• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The device implements the method to kill edges of a sheet of sheet material from which a box (20) is formed, and comprises an anvil surface in relation to which at least part of the plate is supported, and a trapping member fixed to a movable member which is moved by a driving means towards the anvil surface until the trapping member crushes a portion of a living edge of the plate formed by a dead edge portion (32). The operation of killing the edges by means of the device is carried out in a punching machine during the die cutting of the plate or in a box forming machine during the formation of the box (20). The box (20) and the plate exhibit portions of killed edge (32) exposed or intended to be exposed on an internal side of the box (20). (Machine-translation by Google Translate, not legally binding)
    公开号:ES2580903A1
    申请号:ES201530252
    申请日:2015-02-26
    公开日:2016-08-29
    发明作者:Telesforo González Olmos
    申请人:Telesforo González Olmos；
    IPC主号:
    专利说明:

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    DESCRIPTION
    METHOD AND DEVICE FOR KILLING ARMS OF A SHEET OF LAMINARY MATERIAL FROM WHICH A BOX, MATERIAL IRON IS FORMED
    ROLL, AND BOX
    Technique Field
    The present invention concerns a method and a device for killing edges of a sheet of sheet material from which a box is formed by bending and gluing the sheet of sheet material in a box-forming machine. The present invention also concerns a sheet of sheet material for forming a box, and a box formed from a sheet of sheet material, where both the sheet of sheet material and the box have some portions of their slanted edges.
    Throughout this description, the term "sheet material" is used to designate corrugated cardboard sheet, corrugated plastic sheet, laminate of a simple or composite material including a foamed polymer, and in general any sheet of a material that includes air in its interior and that consequently is susceptible to being crushed.
    Background of the invention
    Document ES 1008620 U discloses a box formed from a sheet of folded and glued sheet material. The sheet of sheet material is obtained by die-cutting using a die-cutting machine and has outer contour edges that define a perimeter and weakened lines that define a rectangular bottom wall, two side walls and two tester walls attached to the bottom wall , and a plurality of flaps extending from edges of the tester walls. In the box, the side walls and the tester walls are perpendicular to the bottom wall and first flaps that extend from the side edges of the tester walls are folded and glued to the side walls and second flaps that extend from upper edges of the tester walls are folded and glued partly on the tester walls themselves and partly on the first flaps on the inner side of the box.
    A variety of boxes of this type are also known where, for example, the tester walls are slightly inclined in convergent directions with respect to the back wall and / or in which the flaps form corner reinforcements and / or roofs, and / or where the flaps extend from upper edges of the side walls and are bent and
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    glued to the side walls themselves on the inner side of the box, and / or the box is stackable and has upper anchoring projections and anchoring openings in the base defined by inner contour edges.
    A first drawback of this type of boxes is that the die-cutting machine that manufactures the sheet of sheet material uses sharp blades to cut the outer and inner contour edges of the sheet of sheet material and, and these blades produce along the outer and inner contour edges and on both sides of the sheet of sheet material live edges that can be sharp. In a box formed from the sheet of sheet material some of these living edges are exposed on the inner side of the box and produce unwanted cuts in the products contained in the box.
    This is especially critical when, as is very common, these types of boxes are used to contain fruits or vegetables, since an alteration or cut produced by such sharp edges on the surface of a fruit or vegetable can lead to an accelerated oxidation process of the same, making it unfit for consumption and putting the rest of the products contained in the box at risk, since the damaged fruit or vegetable becomes a focus of bacteria and other unwanted microorganisms.
    A second drawback of this type of boxes is that due to the existence of said live edges, the operators who handle the plates in the box-forming machines and the operators who manipulate the boxes in the packaging processes, etc., are at risk of experiencing cuts in your hands or fingers produced by the sharp edges.
    Therefore, there is a need for a method and a device to kill some of the living edges of the sheet of sheet material, either during a die cutting operation of the sheet of sheet material in a die cutting machine or during a forming operation of a box by bending and gluing the sheet of sheet material into a box-forming machine, or even during an edge chamfering operation performed after the sheet of sheet material has been punched into the die-cutting machine and before it has been folded and glued on the box-forming machine, in order to obtain boxes devoid of sharp edges on its inner side.
    On the other hand, die-cutting machines are known that have a suffering surface, a mobile organ, blades fixed to the mobile organ, and actuation means that move the mobile organ towards the suffering surface until the blades cut a sheet of supported sheet material on the surface suffridera. In a flat die cutting machine the surface will be constituted by a counter-plate and the
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    Mobile organ is constituted by a plate holder. In a rotary die cutting machine the surface will be constituted by a counter-cylinder and the mobile organ is constituted by a cylinder-holder.
    Also known, for example, from documents ES 0235835 U and ES 0255122 U, box-forming machines made from sheets of die-cut sheet material. These box-forming machines generally comprise four corner assemblies that delimit a molding cavity, a plate feeding device that places the sheets of laminar material one by one in an initial position on a mouth of the molding cavity, and a mandrel that moves by inserting the sheet of sheet material into the molding cavity, thereby causing a bending of different portions of the sheet of sheet material in cooperation with different elements of said corner assemblies.
    Conventional box-forming machines also include an adhesive applicator device that applies adhesive to selected areas of the sheet of sheet material before it is placed in the initial position, and pressure applicator bending elements that fold flaps of the sheet of sheet material including the areas that carry the adhesive, superimpose them on different folded portions of the sheet of sheet material and apply a pressure in cooperation with some surface surfaces constituted by mold side plates adjacent to the molding cavity for a time default to complete a paste.
    Exposition of the invention
    According to a first aspect, the present invention provides a method for killing edges of a sheet of sheet material, comprising the steps of supporting at least part of a sheet of sheet material in relation to a suffering surface, providing a tread member fixed to a mobile organ actuated by actuation means, and by means of said actuation means moving said movable organ towards said suffering surface until said tread member crushes at least a portion of one or more live edges of the sheet of sheet material against the suffering surface to form a portion of killed edge.
    In one embodiment of the method, the desired portions of the one or more living edges of the sheet of sheet material are crushed during a die cutting operation of the sheet of sheet material in a die cutting machine, where an element of
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    Counter die of the die cutting machine is used as the surface of the die and a die holder of the die cutting machine is used as the moving organ.
    In another embodiment of the method, the desired portions of the one or more living edges of the sheet of sheet material are crushed during an operation of forming a box by bending and gluing the sheet of sheet material into a box-forming machine, where A mold side plate of the box forming machine is used as the surface of the box and a pressure applicator bending element of the box forming machine is used as the mobile organ.
    According to a second aspect, the present invention provides a device for killing edges of a sheet of sheet material, comprising a surface suffering in relation to which at least part of a sheet of sheet material is supported, a tread member attached to a mobile organ, and drive means that move the mobile organ towards the surface until the tread member crushes at least a portion of one or more living edges of the sheet of sheet material against the surface.
    In one embodiment of the device, the surface will be constituted by a counter plate of a flat die cutting machine and the mobile organ is constituted by a plate holder of the flat die cutting machine.
    In another embodiment of the device, the suffering surface is constituted by a counter-cylinder of a rotary die-cutting machine and the mobile organ is constituted by a die-holder cylinder of said rotary die-cutting machine.
    In yet another embodiment of the device, the surface will be constituted by a side mold plate of a box-forming machine that forms a box by bending and gluing the sheet of sheet material and the mobile organ is constituted by a bending element applicator of box forming machine pressure.
    According to a third aspect, the present invention provides a sheet of sheet material for forming a box by folding and gluing the sheet of sheet material in a box-forming machine. The sheet of sheet material comprises outer contour edges that define a perimeter and weakened lines that define a rectangular bottom wall, two side walls and two tester walls attached to the bottom wall, and a plurality of flaps that extend from the edges of the side walls and / or the walls of the wall. The outer contour edges present
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    live edges all along them except in a few portions of a slanted edge where a sheet material constituting the sheet of sheet material is crushed.
    Optionally, the sheet of laminar material comprises inner contour edges that define openings, and these inner contour edges also have live edges except in portions of slatted edge where the sheet material constituting the sheet of sheet material is crushed.
    In one embodiment of the plate, the sheet material has a flat or bevelled crush formed on one side of the sheet of sheet material provided to be exposed on an inner side of the box.
    In another embodiment of the plate, the sheet material has a rounded concave crush formed on one side of the sheet of sheet material provided to be hidden and facing an external side of the box.
    According to a fourth aspect, the present invention provides a box formed from a sheet of folded and glued sheet material. The box comprises a rectangular bottom wall, two side walls and two tester walls attached to said bottom wall, and a plurality of flaps extending from edges of said side walls and / or said tester walls and which are folded and glued to the side walls and / or to the front walls. The flaps comprise outer contour edges that have vivid edges all along them except in some portions of slanted edge exposed on said inner side of the box, where a sheet material constituting the sheet of sheet material is crushed.
    Optionally, the box also comprises openings defined by internal contour edges in the bottom wall and / or in the side walls and / or in the front walls. These inner contour edges have sharp edges except for portions of a slanted edge exposed on the inner side of the box where the sheet material constituting the sheet of sheet material is crushed.
    In one embodiment of the box, the sheet material has a flat or bevelled crush formed on one side of the sheet of sheet material that is exposed on an inner side of the box.
    In another embodiment of the box, the sheet material has a rounded concave crush formed on one side of the sheet of sheet material that is hidden and facing an outer side of the box.
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    Brief description of the drawings
    The foregoing and other features and advantages will be more fully understood from the following detailed description of some examples of realization, which have a merely illustrative and non-limiting character, with reference to the attached drawings, in which:
    Fig. 1 is a perspective view of a box formed from a sheet of sheet material according to an embodiment of the fourth aspect of the present invention;
    Fig. 2 is a partial top plan view of a corner of the box of Fig. 1;
    Fig. 3 is a front view of a sheet of sheet material for forming a box according to an embodiment of the third aspect of the present invention, from which the box of Fig. 1 is formed;
    Fig. 4 is a perspective view of a box formed from a sheet of sheet material according to another embodiment of the fourth aspect of the present invention;
    Fig. 5 is a perspective view of a box formed from a sheet of sheet material according to yet another embodiment of the fourth aspect of the present invention;
    Figs. 6 and 7 are perspective views of a flat die cutting machine and a rotary die cutting machine, respectively, that include a device for killing edges of a sheet of sheet material according to an embodiment of the second aspect of the present invention, and that implement a method according to the first aspect of the present invention to produce the sheet of sheet material of Fig. 3;
    Fig. 8 is a schematic partial plan or plan view of a die used in a rotary die cutting machine of the type shown in Fig. 6 or in a flat die cutting machine of the type shown in Fig. 7;
    Fig. 9 is a cross-sectional view taken along the plane VIII-VIII of Fig. 8, with the die in a position prior to punching;
    Fig. 10 is a cross-sectional view similar to Fig. 9, with the die in a die-cut position;
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    Figs. 11 and 12 are cross-sectional views similar to Fig. 10, showing different alternative configurations for a tread member adjacent to a cutting blade;
    Fig. 13 is a partial perspective view of a box formed from a sheet of sheet material according to yet another embodiment of the fourth aspect of the present invention;
    Fig. 14 is a perspective view of a device for killing edges of a sheet of sheet material according to another embodiment of the second aspect of the present invention, and implementing the method according to the first aspect of the present invention for produce the box of Fig. 13 in a box-forming machine by folding and gluing a sheet of sheet material; with a mobile organ in a waiting position;
    Fig. 15 is a perspective view of the device of Fig. 14 with the movable organ in a tightening position, including an enlarged detail showing a tread member attached to the movable organ;
    Figs. 16 and 17 are schematic side views of the device of Figs. 14 and 15 in relation to a sheet of sheet material and with the mobile organ in the resting position and in the tightening position, respectively;
    Fig. 18 is a schematic top view of the device of Figs. 14 and 15 in relation to the sheet of sheet material and with the mobile organ in the tightening position;
    Figs. 19, 20, 21 and 22 are partial perspective views similar to the enlarged detail of Fig. 15 showing different alternative configurations for a tread member attached to the mobile organ;
    Fig. 23 is a perspective view of a device according to a variant of the embodiment shown in Figs. 14 to 18, with the mobile organ in the tightening position and sliding slides that carry the tread members in a retracted position; Y
    Fig. 24 is a perspective view similar to Fig. 23, with the slides carrying the tread members in an extended position.
    Detailed description of some examples of realization
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    In relation to Figs. 1 and 2, reference numeral 20 designates a box formed from a sheet of sheet material 40 (shown in Fig. 3) folded and glued. The sheet of sheet material 40 is made of a semi-rigid sheet material, such as for example corrugated cardboard sheet or corrugated plastic sheet, although a sheet of a simple or composite material including a foamed polymer is also within the scope of the invention. or any other sheet of a material that includes air inside. All these sheet materials have in common that they are susceptible to being crushed by pressure.
    The box 20, as is conventional, comprises a rectangular bottom wall 22, two side walls 23 and two tester walls 24 attached to the bottom wall 22, and corner flaps 25 extending from side edges of the walls of tester 24 and which are folded into several portions that form corner columns 29, where a portion of each corner flap 25 is glued to an interior surface of one of the side walls 23 and another portion is glued to an interior surface of the same tester wall 24 from which it extends.
    From an upper edge of the central portions of the corner flaps 25 that make up the corner columns 29, protruding projections 30 protrude, which are inserted into anchor openings 31 formed in the bottom wall of another analogous housing 20 in a situation stacked
    Each of the side walls 23 has a lateral internal reinforcement flap 26 extending from its upper edge and which is bent and glued to an inner surface of the same side wall 23 from which it extends.
    An essential feature of the box 20 of the present invention is that both corner flaps 25 and lateral internal reinforcement flaps 26 have outer contour edges 41 that have sharp edges except in portions of slanted edge 32 that are exposed on an inner side of the box 20. In these slatted edge portions 32, the sheet material constituting the sheet of sheet material 40 is crushed.
    In the example illustrated in Figs. 1 and 2, all the killed edge portions 32 have a bevelled crush formed on a face of the sheet of sheet material 40 that is exposed on the inner side of the box 20. Thus, the killed edge portions 32 eliminate the presence of live edges exposed on the inner side of the box 20 and prevent
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    produce unwanted cuts in the products contained in the box, or even in the hands of the users, as a result of such sharp edges.
    In the corner flaps 25, the killed edge portions 32 are located at edges perpendicular to the bottom wall 22 of the box 20 while in the lateral internal reinforcement flaps 26 the killed edge portions 32 are located both at about perpendicular edges as on edges parallel to the bottom wall 22 of the box 20.
    The killed edge portions 32 existing in the box 20 shown in Figs. 1 and 2 can be produced either during a die cutting operation of the sheet of sheet material 40 in a die cutting machine or during a forming operation of a box 20 by folding and gluing the sheet of sheet material 40 in a forming machine of boxes, as will be explained in greater detail below.
    Fig. 3 shows a sheet of sheet material 40 from which the box 20 described above is formed in relation to Figs. 1 and 2. The sheet of sheet material 40 comprises outer contour edges 41 that define a perimeter and weakened lines 47 that define a rectangular bottom panel 42, two side panels 43 and two tester panels 44 attached to the bottom panel 42, and corner flap panels 45 extending from edges of the tester panels 24 and reinforcement flap panels 46 extending from edges of the side panels 43. The sheet of laminar material 40 also includes anchoring projections 30 in the corner flap panels 45 and anchoring openings 31 in the bottom panel 42.
    The sheet of sheet material 40 is folded and glued in a box-forming machine to form the box 20, such that the bottom panel 42 of the sheet of sheet material 40 constitutes the bottom wall 22 of the box 20, the side panels 43 of the sheet of sheet material 40 constitute the side walls 23 of the box 20, the tester panels 44 of the sheet of sheet material 40 constitute the tester walls 24 of the box 20, the corner flap panels 45 of the sheet of sheet material 40 constitute the corner flaps 25 that form the corner columns 29 of the box 20, and the reinforcement flap panels 46 of the sheet of sheet material 40 constitute the lateral internal reinforcement flaps 26 of the box 20.
    An essential feature of the sheet of sheet material 40 of the present invention is that the outer contour edges 41 have sharp edges except for some portions of slatted edge 32 (represented by shading in Fig. 3) where the sheet material that constitutes the sheet of sheet material 40 is crushed. The
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    mentioned portions of slanted edge 32 are located in certain portions of the edges of the corner flap panels 45 and of the reinforcement flap panels 45 provided to be exposed on an inner side of the box 20.
    The sheet material constituting the sheet of sheet material 40 from which the box 20 is formed has two mutually parallel major faces on opposite sides thereof separated by a certain thickness of the sheet material, and the outer contour edges 41 have a edge surface perpendicular to the major faces, such that the outer contour edges 41 offer two mutually parallel living edges, each of which is arranged at the intersection of the edge surface with one of the major faces.
    Of the two main faces of the sheet of sheet material 40, one is an outer face intended to be on the outer side of the box 20, at least in the bottom, side and front panels 42, 43, 44, and the another is an inner face provided to be on the inner side of the box 20, although in some flap panels, such as corner flap panels 45 and reinforcement flap panels 46, the outer face of the iron sheet material 40 is on the inner side of the box 20 since they are folded into the box 20.
    Accordingly, the sheet of sheet material 40 shown in Fig. 3 has the crushing of sheet material constituting the slatted edge portions 32 formed on the outer face of the sheet of sheet material 40, since it is the face of the panels of corner flap 45 and reinforcement flap panels 46 intended to be exposed on the inner side of the box 20.
    The outer face of the sheet of sheet material 40 usually has an aesthetic finish that may include printed information. The inner face usually has a functional finish that may include, in some cases, a surface treatment, such as a hydrophobic coating.
    The slanted edge portions 32 existing in the sheet of sheet material 40 are preferably produced during a die-cutting operation of the sheet of sheet material 40 in a die cutting machine, as will be explained in greater detail below. However, as an alternative alternative method, the present invention provides that the slatted edge portions 32 are formed after the sheet of sheet material 40 has been punched in the die cutter and before it has been folded and glued into the forming machine of boxes.
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    Fig. 4 shows a box 20 according to another embodiment of the present invention, which has a rectangular bottom wall 22, two side walls 23 and two tester walls 24 attached to the bottom wall 22, and flaps of corner 25 extending from side edges of the tester walls 24 and which are folded and glued to an inner surface of the side walls 23. From a top edge of the tester walls 24, folded horizontal reinforcing flaps 33 extend forming some roofs. The horizontal reinforcement flaps 33 end at their lateral ends with union flaps 34 folded and glued to an outer surface of the corner flaps 25.
    Sections in the horizontal reinforcement flaps 33 determine anchor projections 30 that are prolongation of the tester walls 24, and anchor openings 31 are formed partly on the bottom wall 22 and partly on the tester walls 24 The anchoring projections 30 are inserted into the anchoring openings 31 of another analog box 20 in a stacked situation.
    The box 20 shown in Fig. 4 is obtained from the folding and gluing of a corresponding sheet of sheet material (not shown) comprising outer contour edges 41 defining a perimeter, inner contour edges 27 defining the anchor openings 31, and weakened lines defining panels that constitute the different walls and flaps of the box 20.
    Both the outer contour edges 41 and the inner contour edges 27 have sharp edges except for a few portions of slanted edge 32 where the sheet material constituting the sheet of sheet material 40 is crushed. In the box 20 shown in Fig. 4, the killed edge portions 32 encompass vertical end edges of the corner flaps 25 and horizontal upper edges of the anchor openings 31, which are exposed on an inner side of the box.
    Fig. 5 shows a box 20 according to another embodiment of the present invention, which is analogous to the embodiment described in relation to Fig. 4 except that there are corner flaps 25 extending from the edges. sides of the tester walls 24 are folded and glued to an outer surface of the side walls 23. In the box 20 shown in Fig. 5, the slatted edge portions 32 encompass horizontal upper edges of the side walls 23 and about horizontal upper edges of the anchor openings 31, which are exposed on an inner side of the box.
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    The killed edge portions 32 existing in the box 20 shown in Fig. 5 are produced during a die-cutting operation of the sheet of sheet material 40 in a die-cutting machine, as will be explained in greater detail below. In this embodiment, the sheet material constituting the sheet of sheet material has, in the portions of slatted edge 32, a bevel crush formed in the inner face of the sheet of sheet material, which is what remains on the inner side of the sheet. box 20 on the bottom, side and front walls 22, 23 and 24.
    One skilled in the art will recognize that there is a wide variety of boxes formed from a sheet of folded and glued sheet material of different configurations, in which, for example, the tester walls may have at their upper edges portions of edge killed, or they may have other types of fins including portions of killed edge, in any case on one side of the sheet material exposed on the inner side of the box 20.
    In relation to Figs. 6 to 24, a method for killing edges of a sheet of sheet material 40 from which a box 20 is formed by bending and gluing the sheet of sheet material 40 is described below.
    The method of the present invention comprises supporting at least part of a sheet of sheet material 40 in relation to a suffering surface 3, arranging a tread member 5 attached to a mobile organ 4 actuated by actuating means, and moving by means of actuating the movable organ 4 towards the suffering surface 3 until the tread member 5 crushes at least a portion of one or more live edges of the sheet of sheet material 40 against the suffering surface 3 to form one or more portions of slanted edge 32.
    According to the method, the action of crushing one or more portions of the one or more living edges of the sheet of sheet material 40 can be carried out during a die-cutting operation of the sheet of sheet material 40 in a die cutting machine 8, 11, or alternatively during an operation of forming the box 20 by folding and gluing the sheet of sheet material 40 into a box-forming machine, or even by a simple edge chamfering operation performed after the sheet of sheet material 40 has been punched in the die cutting machine 8, 11 and before it has been folded and glued in the box forming machine.
    Figs. 6 to 12 illustrate a device for killing edges of a sheet of sheet material 40 according to an embodiment in which the edge killing operation is performed
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    during a die-cutting operation of the sheet of sheet material 40 in a flat die cutting machine 8 (Fig. 6) or in a rotary die cutting machine 11.
    In this embodiment, the device of the present invention comprises a suffering surface 3, a moving organ 4, actuation means that move the moving organ 4 towards the suffering surface 3, and a tread member 5 fixed to the moving organ 4.
    In the flat die cutting machine 8 shown in Fig. 6, the suffering surface 3 is constituted by a counter-plate 6 on which an initial sheet of sheet material 2 is supported (Figs. 9 to 12) from which it goes obtaining the sheet of sheet material 40 by die-cutting, and the mobile organ 4 is constituted by a die-holder plate 7 on which a plurality of cutting blades 12 fixed to cut the sheet of initial sheet material 2 and forming the sheet of material are fixed laminate 40.
    In the rotary die cutting machine 11 shown in Fig. 7, the suffering surface 3 is constituted by a counter-cylinder 9 on which the initial sheet of sheet material 2 (Figs. 9 to 12) is supported, from which it goes to obtain the sheet of sheet material 40 by die-cutting, and the mobile organ 4 is constituted by a cylinder holder 10 on which a plurality of cutting blades 12 are configured to cut the sheet of initial sheet material 2 and form the sheet of material laminate 40.
    Fig. 8 shows a portion of the die holder plate 7 of the flat die cutting machine 8 or a portion of a flat development of the die holder cylinder 10 of the rotary die cutting machine 11 constituting the mobile organ 4. On this mobile organ 4 of the machine The cutting blades 12 are arranged to make cuts that define a perimeter of the sheet of sheet material 40 to be stamped, and also weakened blades 13 arranged to make a weakened lines defining different panels and flaps in the die are fixed. sheet of sheet material 40. The weakened blades 13 are configured to perform a weakening, such as for example a crease, a partial deep cut, or a discontinuous "stitching" cut that facilitates a subsequent bending of the sheet of sheet material 40
    On both sides of the cutting blades 12 are disposed ejector elements 21 that follow the path of the cutting blades 12 at a certain distance from them. These ejector elements 21 are made of an elastic material, such as rubber or a relatively soft elastomer, and have the function of facilitating the separation of the semi-rigid sheet material and the cutting blade 12 once the cutting has been performed. The cut made by the cutting blade 12 is a clean cut perpendicular to the faces
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    larger than the flat sheet of sheet material 40, which produces two live edges adjacent to the two sides of the sheet material at the cut edges. These live edges have the risk of being sharp although the sheet material is made of paper, as is the case of corrugated cardboard.
    The mobile organ 4 of the die cutting machine also has a set of tread members 5 arranged in positions adjacent to portions of the cutting blades 12 provided for cutting edges of the sheet of sheet material 40 that will be exposed on an internal side of a box 20 to be formed by bending and gluing the sheet of sheet material 40. Each tread member 5 is disposed on one side of the cutting blade 12 corresponding to the sheet of sheet material 40 to be obtained by punching the plate of initial sheet material 2, and the cutting blade 12 has an edge that protrudes from an end surface of the tread member 5.
    The function of these tread members 5 is to crush the sheet material constituting the sheet of sheet material 40 next to selected edges to form portions of slanted edge 32 provided to be exposed on an inner side of the box 20 to be formed from the sheet of sheet material 40.
    Fig. 9 schematically shows an initial sheet of sheet material 2 supported on the suffering surface 3 of the corresponding die cutting machine, and the mobile organ 4 of the die cutting machine facing the suffering surface 3 in a resting position in which the blade of cutting 12, the ejector elements 21 and the tread member 5 are separated from the initial sheet of sheet material 2. In this example, the sheet material constituting the sheet of initial sheet 2 is a double-layer corrugated cardboard sheet, although alternatively it could be another type of corrugated cardboard or any other material capable of being crushed, such as corrugated plastic sheet, laminate of a simple or composite material including a foamed polymer, and in general any laminate of a material that includes air in its inside.
    Fig. 10 shows the mobile organ 4 of the die-cutting machine in a die-cutting position that is reached after the actuating means of the die-cutting machine have moved the mobile organ 4 towards said suffering surface 3 for a predetermined distance. In the die-cutting position shown in Fig. 10, the cutting blade 12 has completely cut the initial sheet of sheet material 2 forming the outer contour edges 41 that separate the sheet of sheet material 40 from the rest of the sheet of sheet material initial 2, and has penetrated a short surface distance
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    3, the ejector elements 21 have elastically compressed between the mobile organ 4 and the sheet material, and the tread member 5 has crushed a living edge of a portion of the contour edge 41 of the sheet of sheet material 40 adjacent to the blade of cut 12 to form the portion of slain edge 32.
    Usually, in the die-cutting machines the suffering surface 3 is made of a relatively hard plastic material that nevertheless allows the penetration of the cutting blades 12. Many die-cutting machines have a positioning device that slightly changes the position of the suffering surface 3 with respect to the mobile organ 4 after each die-cutting cycle to retard the deterioration of the suffering surface 3, and a rectifying device that lowers the suffering surface 3 by milling or turning whenever it is deemed necessary to eliminate a damaged surface part.
    Once the stamping has been carried out, the mobile organ 4 is moved back to the rest position and the ejector elements 21 undergo an elastic recovery that pushes on one side the sheet material constituting the sheet of sheet material 40 and on the other side the sheet material that constitutes the rest of the sheet of initial sheet material 2 to separate them from the cutting blade 12.
    In the embodiment shown in Figs. 9 and 11, the end surface of the tread member 5 has a planar shape perpendicular to a side surface of the cutting blade 12 and parallel to the suffering surface 3, which results in a flat crushing of the laminar material of the killed edge portion 32
    Fig. 11 shows another alternative embodiment of the tread member 5, where the end surface of the tread member 5 has a flat inclined shape with respect to the lateral surface of the cutting blade 12, and where the edge of the end surface of the tread member 5 which is adjacent to the side surface of the cutting blade 12 is at a level closer to the cutting edge of the cutting blade 12 than the opposite edge, which results in a bevel crushing in the sheet material of the slatted edge portion 32.
    Fig. 12 shows yet another alternative embodiment of the tread member 5, where the end surface of the tread member 5 has a rounded shape, which results in a rounded concave crush in the laminar material of the killed edge portion 32. In this concave crush rounded, the layers of the sheet material closest to the tread member experience a shortening greater than the farthest layers, resulting in a rising of the portion of the outer contour edges 41
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    corresponding to the portion of the edge killed 32 from the surface surface 3 to the mobile organ 4.
    Both the flat crushing (Fig. 10) and the chamfering crushing (Fig. 11) of the killed edge portions 32 are suitable when the punching and crushing are formed on a face of the sheet of sheet material 40 intended to be exposed in the inner side of the box 20. The rounded concave crushing (Fig. 12) is suitable when the punching and crushing are formed on one side of the sheet of sheet 40 provided to be hidden and facing the outer side of the box 20 It should be borne in mind that all the slanted edge portions 32 of a sheet of sheet material 40 will be formed on the same side of the sheet of sheet material 40, while, depending on the configuration of the box 20, the side of the sheet of laminar material 40 where the stamping and crushing have been carried out can be exposed on the inner side of the box 20 in some flaps and hidden and facing the outer side of the box 20 in others. barnacles
    Fig. 13 shows a box 20 obtained by folding and pasting a sheet of sheet material 40 by means of a box-forming machine (not shown). The box 20 shown in Fig. 13 has slatted edge portions 32 on some edges exposed on an inner side of the box 20. However, and in accordance with another alternative embodiment of the method of the present invention, the sheet of sheet material 40 from which the box 20 is formed has all its sharp edges and the killed edge portions 32 are produced during a bending and gluing operation of the sheet of sheet material 40 in the box forming machine, which includes for This purpose is a device for killing edges according to another alternative embodiment of the present invention.
    The box 20 shown in Fig. 13 comprises a rectangular bottom wall 22, and two side walls 23 and two tester walls 24 attached to the bottom wall 22. Each of the tester walls 24 has an internal reinforcing flap of tester 35 which extends from its upper edge and which is folded and glued to an inner surface of the same tester wall 22 from which it extends. The tester walls 24 and the internal reinforcement flaps of the tester 35 have aeration recesses 39 on an upper bending edge.
    External corner flaps 36 extend from side edges of the tester walls 24 which are folded and glued to outer surfaces of the corresponding side walls 23 and from side edges of the flaps of
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    internal booster reinforcement 35 extends internal corner flaps 37 that are folded and glued to interior surfaces of the corresponding side walls 23. The internal corner flaps 37 have column portions 38 that are inclined forming corner reinforcements in The corners
    From the upper edges of the tester walls 24 and the outer corner flaps 36 adjacent to the corners, protruding projections 30 protrude, which are inserted into conjugated anchor cuts 28 formed at lower edges of the tester walls 24 and of the outer corner flaps 36 of another analog box 20 in a stacked situation.
    The inner corner flaps 37 have slatted edge portions 32 formed at vertical end edges exposed on an inner side of the box 20, and the aeration recesses 39 of the inner stiffening flap 35 have portions of slatted edge. 32 formed on horizontal edges exposed on an inner side of the box 20. All of the killed edge portions 32 have been produced by the edge killing device included in the box forming machine.
    Figs. 14 to 18 show the device for killing edges included in the box-forming machine, where the suffering surface 3 is constituted by mold side plates 15a and mold tester plates 15b pre-existing in the box-forming machine and the mobile organ 4 is constituted by pressure applicator bending elements 16 conventionally included in the box-forming machine and modified according to the present invention as explained in detail below.
    As shown in Figs. 14 and 15, the mold side plates 15a and the mold tester plates 15b are fixed in stationary positions in a structural element 14 of the box forming machine defining a molding cavity, and the pressure applicator bending elements 16 are fixed to a support 51 which in turn is fixed to a tree 48 which is supported on the structural element 14 so that it can rotate with respect to an axis perpendicular to the mold side plates 15a and parallel to the mold tester plates 15b , and also parallel to the bottom wall 22 of the box 20 when the box 20 is being formed in the box forming machine. Conventional drive means included in the box forming machine rotates the shaft 48 together with the pressure applicator bending elements 16 between a waiting position (Figs. 14 and 16) and a tightening position (Figs. 15, 17 and 18).
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    During an operation of forming the box 20 in the box-forming machine, the sheet of sheet material 40 is placed in an initial position on a mouth of the molding cavity and a mandrel inserts the sheet of sheet material into the cavity. of molding while the pressure applicator bending elements 16 are in the waiting position (Figs. 14 and 16), thereby causing a bending of different portions of the sheet of sheet material in cooperation with different elements (not shown) associated with the molding cavity so that the tester walls 24 are arranged in a position perpendicular to the bottom wall 22 and supported on the mold tester plates 15b, the outer corner flaps 36 are also arranged in a position perpendicular to the wall bottom 22 and supported on the side mold plates 15a and the side walls 23 are also arranged in a position perpendicular to the wall of fo Node 22 and resting on external corner flaps 36.
    Subsequently, the mandrel is removed from the molding cavity and conventional actuating means effect a rotational movement of the pressure bending elements 16 relative to the shaft of the shaft 48 to the tightening position (Figs. 15, 17 and 18 ), thereby folding the inner reinforcement flaps 35 and internal corner flaps 37 and pressing them against the front walls 24 and side walls 23, respectively, which in turn are supported on the side plates of mold 15a and in mold tester plates 15b, respectively. The box-forming machine conventionally has a glue applicator device that applies glue on selected areas of the sheet of sheet material 40 before it is folded, and the pressure-applying bending elements 16 are held in the tightening position for a short time. adequate time to ensure that the tail performs its bonding effect.
    The pressure applicator bending elements 16 have beveled surfaces 16b adapted to form the corner reinforcements in the corners of the box 20 by means of the column portions 38 during the action of folding the inner corner flaps 37.
    Each pressure applicator bending element 16 has one or more pressure surfaces and has at least one tread member 5 protruding from one of the pressure surfaces of the pressure applicator bending element 16. In the embodiment shown in Figs. 14 and 15, the tread member 5 is formed in an additional piece 49, which is fixed to the pressure applicator bending element 16 by removable fixing elements, such as screws 50. The additional piece 49 is configured so that the member treadmill 5 protrudes from a lateral pressure surface 16a of the element
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    pressure applicator bender 16 to produce the portion of slanted edge 32 at the end edge of the inner corner flap 37 of the box 20.
    As the enlarged detail of Fig. 15 best shows, the tread member 5 extends partly along an extension of the additional piece 49 that partially overlaps the lateral pressure surface 16a of the pressure applicator bending element 16, and it has an inclined flat pressure surface with respect to the lateral pressure surface 16a of the pressure applicator bending element 16. This configuration produces a crushing of the sheet material at the extreme vertical edge of the inner corner flap 37, which is exposed in the inner side of the box 20, creating a portion of slanted edge 32 beveled with a significantly obtuse bevel angle.
    Optionally, another additional tread member (not shown) is fixed to the support 51 between the two pressure applicator bending elements 16 so that when the pressure applicator bending elements 16 are moved to the tightening position, the additional tread member crushes the material laminating producing a portion of slanted edge 32 chamfered on a horizontal edge of the aeration recess 39 exposed on the inner side of the box 20.
    Fig. 19 shows a tread member 5 associated with a pressure applicator bending element 16 according to another alternative embodiment, which is analogous to that described in relation to Figs. 14 to 18 except that here the additional piece 49 does not have an extension partially overlapping the lateral pressure surface 16a of the pressure applicator bending element 16 but that the tread member 5 covers only the thickness of the additional piece 49 to create a portion of slanted edge 32 bevelled with an obtuse bevel angle at the extreme vertical edge of the inner corner flap 37, which is exposed on the inner side of the box 20.
    Fig. 20 shows a tread member 5 associated with a pressure applicator bending element 16 according to another alternative embodiment, which is analogous to that described in relation to Fig. 19 except that here the pressure surface of the tread member 5 has a flat shape parallel to the lateral pressure surface 16a of the pressure applicator bending element 16 to create a flat slanted edge portion 32.
    Fig. 21 shows a tread member 5 associated with a pressure applicator bending element 16 according to another alternative embodiment, which is analogous to that described in relation to Fig. 19 except that here the pressure surface of the tread member 5 has a convex curved shape between a leading edge of the additional piece 49 and an edge
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    front of the lateral pressure surface 16a of the pressure applicator bending element 16 to create a slanted edge portion 32 rounded concave.
    Fig. 22 shows a tread member 5 associated with a pressure applicator bending element 16 according to another alternative embodiment, in which the tread member 5 is not formed in an additional piece 49 fixed to the pressure applicator bending element 16 but is formed directly on the pressure applicator bending element 16. The tread member 5 shown in Fig. 22 has the same shape as tread member 5 shown in Figs. 14 to 18, although alternatively it could have any other form deemed convenient.
    Figs. 23 and 24 show another embodiment of the device for killing edges of a sheet of sheet material applied to a box-forming machine that includes mold side plates 15a and stationary mold tester plates 15b and pressure applicator bending elements 16 fixed to a support 51 which in turn is fixed to a tree 48 which can rotate with respect to an axis parallel to the bottom wall 22 of the box 20 when the box 20 is being formed in the box-forming machine. A drive means rotates the shaft 48 together with the pressure applicator bending elements 16 between a waiting position (not shown) and a tightening position (Figs. 23 and 24).
    In the embodiment shown in Figs. 23 and 24, each tread member 5 is connected to a slide 17 slidably mounted on glutton members 18 fixed to the corresponding pressure applicator bending element 16 so that the slide 17 is movable between a retracted position (Fig. 23) , in which the tread member 5 does not protrude from a lateral pressure surface 16a of the pressure applicator bending element 16, and an extended position (Fig. 24), in which the tread member 5 protrudes from said lateral pressure surface 16a of the pressure applicator bending element 16 constituting a protruding flange.
    Each slide 17 is connected to a linear actuator 19, such as a pneumatic actuator, installed on the pressure applicator bending element 16. During an operation of forming a box 20 by folding and gluing a sheet of sheet material 40 into the box forming machine, and after the shaft 48 together with the pressure applicator bending elements 16 has been rotated from the waiting position (not shown) to the tightening position (Figs. 23 and 24) to bend, position and apply pressure to the internal tester reinforcement flap 35 and corner flaps
    internal 37 (Fig. 13), the linear actuators 19 are activated to move the slides 17 together with the tread elements 5 from the retracted position (Fig. 23) to the extended position (Fig. 24), and thereby create portions of killed edge 32 at the extreme vertical edges of the inner corner flaps 37, which are exposed on the inner side 5 of the box 20.
    The scope of the present invention is defined in the appended claims.
    权利要求:
    Claims (22)
    [1]
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    1. - Method for killing edges of a sheet of sheet material (40) from which a box (20) is formed, comprising the steps of: supporting at least part of the sheet of sheet material (40) in relation to a suffering surface (3); disposing a tread member (5) attached to a mobile organ (4) actuated by drive means; and moving said moving organ (4) towards said suffering surface (3) until said tread member (5) crushes at least a portion of one or more living edges of the sheet of sheet material (40) against the Suffering surface (3) to form at least a portion of slatted edge (32) on one side of the sheet of sheet material (40) intended to be exposed on an inner side of the box (20).
    [2]
    2. - Method for killing edges of a sheet of sheet material according to claim 1, characterized in that it comprises crushing said at least one portion of the one or more living edges of the sheet of sheet material (40) during a die cutting operation. the sheet of sheet material (40) in a die cutting machine (8, 11).
    [3]
    3. - Method for killing edges of a sheet of sheet material according to claim 1, characterized in that it comprises crushing said at least one portion of the one or more living edges of the sheet of sheet material (40) during an operation of forming the box (20) by folding and gluing the sheet of sheet material (40) into a box-forming machine.
    [4]
    4. - Device for killing edges of a sheet of sheet material (40) from which a box (20) is formed, comprising a suffering surface (3) in relation to which at least part of a sheet of iron is supported. sheet material (40), a tread member (5) fixed to a mobile organ (4), and actuation means that move said movable organ (4) towards said suffering surface (3) until said tread member (5) crushes at least a portion of one or more live edges of the sheet of sheet material (40) supported by the surface (3) formed at least one portion of slatted edge (32) on one side of the sheet of sheet material (40) intended to be exposed on an inner side of the box (20).
    [5]
    5. - Device for killing edges of a sheet of sheet material according to claim 4, characterized in that the surface (3) is constituted by a counter-plate (6) of a flat die cutting machine (8) and the mobile organ (4 ) is constituted by a die holder plate (7) of said flat die cutting machine (8).
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    [6]
    6. - Device for killing edges of a sheet of sheet material according to claim 5, characterized in that the tread member (5) is fixed to said die holder plate (7) in a position adjacent to at least a portion of a cutting blade (12) fixed to the die holder plate (7) and on one side of said cutting blade (12) corresponding to the sheet of sheet material (40), where an edge of the cutting blade (12) protrudes from an end surface of the tread member (5).
    [7]
    7. - Device for killing edges of a sheet of sheet material according to claim 4, characterized in that the suffering surface (3) is constituted by a counter-cylinder (9) of a rotary die cutting machine (11) and the mobile organ (4 ) is constituted by a die-holder cylinder (10) of said rotary die cutting machine (11).
    [8]
    8. - Device for killing edges of a sheet of sheet material according to claim 7, characterized in that the tread member (5) is fixed to said die holder cylinder (10) in a position adjacent to at least a portion of a cutting blade (12) fixed to the die holder cylinder (10) and on one side of said cutting blade (12) corresponding to the sheet of sheet material (40), where a cutting blade edge (12) protrudes from an end surface of the tread member (5).
    [9]
    9. - Device for killing edges of a sheet of sheet material according to claim 6 or 8, characterized in that said end surface of the tread member (5) has a shape selected from a flat surface perpendicular to a side surface of the cutting blade (12), a flat surface inclined with respect to said lateral surface of the cutting blade (12) having an edge adjacent to the lateral surface of the cutting blade (12) at a level closer to the cutting edge of the cutting blade (12) than an opposite edge, and a rounded surface.
    [10]
    10. - Device for killing edges of a sheet of sheet material according to the
    claim 4, characterized in that the surface will suffer (3) is constituted by a
    side mold plate (15a) or a mold tester plate (15b) of a machine
    Forming boxes forming said box (20) by folding and gluing the sheet of sheet material (40), and the mobile organ (4) is constituted by a pressure-applying bending element (16) of said box-forming machine.
    [11]
    11. - Device for killing edges of a sheet of sheet material according to the
    claim 10, characterized in that said pressure applying bending element (16) makes a turning movement with respect to an axis parallel to a bottom wall (22) of the box (20) when the box (20) is being formed in the box forming machine.
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    [12]
    12. - Device for killing edges of a sheet of sheet material according to the
    claim 10 or 11, characterized in that the tread member (5) comprises a protruding flange formed on a pressure surface of said pressure applicator bending element (16).
    [13]
    13. - Device for killing edges of a sheet of sheet material according to the
    claim 10 or 11, characterized in that the tread member (5) is fixed to said pressure applying bending element (16) by removable fixing elements and constitutes a protruding flange on a pressure surface of said pressure applying bending element (16 ).
    [14]
    14. - Device for killing edges of a sheet of sheet material according to the
    claim 10 or 11, characterized in that the tread member (5) is attached to a
    slide (17) slidably mounted on glutton elements (18) fixed to said pressure applicator bending element (16), said slide (17) is connected to a linear actuator (19) installed on the pressure applicator bending element (16), and said linear actuator (19) moves the slide (17) between a retracted position, in which the tread member (5) does not protrude from a pressure surface of the pressure applicator bending element (16), and a extended position, in which the tread member (5) protrudes from said pressure surface of the pressure applicator bending element (16) constituting a protruding flange.
    [15]
    15. - Sheet of sheet material (40) for forming a box (20) by folding and gluing the sheet of sheet material (40) in a box-forming machine, said sheet sheet sheet material (40) comprising edges of outer contour (41) defining a perimeter and weakened lines (47) defining a rectangular bottom panel (42), two side panels (43) and two tester panels (44) attached to said bottom panel (42) , and a plurality of flap panels extending from edges of said side panels (43) and / or of said tester panels (44), characterized in that said outer contour edges (41) have live edges except in portions of slatted edge (32) where a sheet material constituting the sheet of sheet material (40) is crushed.
    [16]
    16. - sheet of sheet material for forming a box (20) according to claim 15, characterized by comprising interior contour edges (27) defining openings, and said interior contour edges (27) have live edges except in
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    portions of slatted edge (32) where said sheet material constituting the sheet of sheet material (40) is crushed.
    [17]
    17. - sheet of sheet material for forming a box (20) according to claim 15 or 16, characterized in that said sheet material has in said portions of slatted edge (32) a flat or beveled crush formed on one side of the plate of sheet material (40) intended to be exposed on an inner side of the box (20).
    [18]
    18. - sheet of sheet material for forming a box (20) according to claim 15 or 16, characterized in that said sheet material has in said portions of slatted edge (32) a rounded concave crush formed in one side of the plate of sheet material (40) intended to be hidden and facing an external side of the box (20).
    [19]
    19. - Box formed from a sheet of sheet material (40) folded and glued, said box (20) comprising a rectangular bottom wall (22), two side walls (23) and two tester walls (24) joined to said bottom wall (22), and a plurality of flaps that extend from edges of said side walls (23) and / or said tester walls (24) and that are folded and glued to the side walls (23 ) and / or to the tester walls (24), characterized in that said flaps comprise outer contour edges (41) that have sharp edges except in portions of slanted edge (32) exposed on an inner side of the box ( 20) where a sheet material constituting the sheet of sheet material (40) is crushed.
    [20]
    20. - Box formed from a sheet of sheet material (40) according to claim 19, characterized by comprising openings defined by inner contour edges (27) in the bottom wall (22) and / or in the walls lateral (23) and / or on the walls of the head (24), and said inner contour edges (27) have sharp edges except in some portions of slanted edge (32) exposed on said inner side of the box (20) wherein said sheet material constituting the sheet of sheet material (40) is crushed.
    [21]
    21. - Box formed from a sheet of sheet material (40) according to claim 19 or 20, characterized in that said side walls (23) and / or said tester walls (24) have on their upper edges portions of killed edge (32) on said inner side of the box (20).
    [22]
    22. Box formed from a sheet of sheet material (40) according to claim 19, 20 or 21, characterized in that said sheet material has a flat or bevelled crush formed on said face on said slatted edge portions (32). of the sheet of sheet material (40) intended to be exposed on said inner side of the box (20).
    5 23.- Box formed from a sheet of sheet material (40) according to the claim
    19, 20 or 21, characterized in that said sheet material has a rounded concave crush formed in said sheet portions formed on one side of the sheet of sheet material (40) provided to be hidden and facing an external side of the box (20).
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    同族专利:
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    ES2580903B1|2017-05-24|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    GB143316A|1919-02-20|1920-05-20|Harry Bridgman Smith|An improved method of and mechanism for making covered box shells|
    DE2634948A1|1976-08-04|1978-02-09|Ver Verpackungs Gmbh|Cardboard fruit and vegetable crate - consists of one piece of cut=out card folded and glued together to form stacking crate with reinforced ends|
    GB2171050A|1984-01-31|1986-08-20|Astin France Sarl|Method and equipment for cyclically treating a travelling web|
    ES2007712A6|1987-09-09|1989-07-01|Embalaje Iberoamericana|Machine for forming containers|
    FR2693941A1|1992-07-22|1994-01-28|Megatec Sarl|Honeycomb packaging manufacture - comprises wheels and rollers providing pleating, rollers for stamping corrugations and continuous edge cutting.|
    ES2217286T3|1994-11-14|2004-11-01|Graphic Packaging International, Inc.|PROCESS AND APPLIANCE FOR THE PRODUCTION OF TROQUELATED CARTON.|
    WO2014063827A1|2012-10-26|2014-05-01|Baypack Gmbh|Transport crate, particularly for vegetables or fruit|ES2785773A1|2019-04-03|2020-10-07|Telesforo Gonzalez Maqu Slu|MACHINE FORMING POLYEDRIC BOXES WITH INCLINED WALLS FROM FLAT SHEETS OF LAMINAR MATERIAL |
    WO2022009217A1|2020-07-08|2022-01-13|Scitech Centre|Reinforcement pillar assemblies and a method for manufacturing such assemblies|
    法律状态:
    2016-11-22| PC2A| Transfer of patent|Owner name: TELESFORO GONZALEZ MAQUINARIA SLU Effective date: 20161116 |
    2017-01-24| GD2A| Contractual licences|Effective date: 20170124 |
    2017-05-24| FG2A| Definitive protection|Ref document number: 2580903 Country of ref document: ES Kind code of ref document: B1 Effective date: 20170524 |
    2019-07-01| GD2A| Contractual licences|Effective date: 20190701 |
    2021-06-15| GD2A| Contractual licences|Effective date: 20210615 |
    优先权:
    申请号 | 申请日 | 专利标题
    ES201530252A|ES2580903B1|2015-02-26|2015-02-26|Method and device for killing edges of a sheet of sheet material from which a box, sheet of sheet material, and box is formed|ES201530252A| ES2580903B1|2015-02-26|2015-02-26|Method and device for killing edges of a sheet of sheet material from which a box, sheet of sheet material, and box is formed|
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