• 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:
    Drive device (3) for an injection molding machine (4), with a first component (1), in particular a spindle, which can be driven linearly, a second component (2), in particular a crosshead, which is linearly movable by the first component (1), and a coupling device (5), via which the first (1) and the second component (2) are connected in the case of a normal load (N), wherein, in the case of overload (Ü) acting on one of the two components (1, 2), the two components (1, 2) are reversibly decoupled by the coupling device (5), act on the first, linearly driven component (1) and rotatory forces (R), wherein solely by the first component (1) acting on the coupling device (5) Rotational forces (R) in case of overload (Ü) the coupling device (R) is decoupled.
    公开号:AT512311A4
    申请号:T616/2012
    申请日:2012-05-25
    公开日:2013-07-15
    发明作者:Stefan Eppich
    申请人:Engel Austria Gmbh；
    IPC主号:
    专利说明:

    • 1 • ♦ · · * Μ · · * · · · · ♦ 71568 22 / hn
    The invention relates to a drive device for an injection molding machine and an injection molding machine with such a drive device.
    Injection molding machines usually have a variety of different drive devices for various components. Rotational movements, for example of an engine, are often converted into linear or pivotal movements. To prevent damage in the drive device or in the injection molding machine in the case of operating errors, malfunctions or other incidents, overload safeguards are used.
    Often coupling devices are used, which are arranged between two rotating elements. An example of this is apparent from the non-generic DE 24 16 234, which shows an overload clutch in a rotary drive of a screw injection molding machine. Such overload clutches are helpful only with rotary overload. However, as soon as an overload occurs in a linear direction, damage will still occur in any part of the entire drive train.
    The invention therefore relates more to a drive device for an injection molding machine, comprising a first component, in particular a spindle, which can be driven linearly, a second component, in particular a crosshead, which is linearly movable by the first component, and a coupling device, via which at a normal load the first and the second component are connected, wherein in acting on one of the two components overload the two components are reversibly decoupled by the coupling device.
    Thus, in the present invention, it is not a question of pure rotary overload clutches but rather components that are linearly driven and perform a linear movement with each other. An example of such a drive device is apparent from the AT 506 118 B1, which shows a drive device for an injection molding machine with a drive train, in which a predetermined breaking point is provided in a shear bolt, which breaks in case of overload. Instead of the shear bolt described in detail, which has the disadvantage of a costly replacement after overload, is generally described that the interruption device can also be designed as a clutch or the like. Details of this coupling is not described in AT 506 118 B1.
    A problem with such linear drives is that, especially in the case of errors such as jamming etc., the linear forces are relatively low, but the rotational forces resulting from the drive means are very high. Usually the balance of forces between rotational forces and linear forces is about 3: 1.
    The object of the present invention is therefore to provide a drive device in which a damage of interconnected and linearly driven components are prevented by acting on these components in case of overload high rotational forces.
    This is achieved by a drive device with the features of claim 1. According to the invention, it is accordingly provided that rotational forces also act on the first, linearly drivable component, wherein the coupling device can be decoupled solely by the rotational forces acting on the coupling device from the first component in the event of overload. If, due to any malfunction, the actually linearly driven first or second component can no longer move linearly, this overload also introduces rotary forces into one of the components, usually from a drive means via friction, whereby high destructive rotational forces occur between the first and second Act component. In order to prevent damage in the region of these two components, a coupling device between the two components is installed according to the invention, which can transmit both the linear forces occurring at normal load as well as can be decoupled solely by increased rotational forces.
    A rotary overload clutch according to DE 24 16 234 could not be installed in the AT 506 118 B1, since this rotary overload clutch is purely for the transmission of rotational forces and thus can not be used in a linear drive according to the present invention. . * * • 'fl') *; · · Ο 's · ft > · R i · r rt * Λ m *
    r t ft * > »T # 4 I w
    According to a preferred embodiment of the present invention can be provided that after decoupling of the coupling device, the first component is rotatable relative to the second component. Since the first or the second component can thus escape, the high rotational forces can no longer cause destruction.
    A first embodiment of the present invention may provide that the coupling device has friction surfaces, via which the first and the second component are frictionally connected at normal load, wherein the friction surfaces are mutually rotatably movable in overload.
    According to an alternative alternative Ausführungsfbrm it can be provided that the coupling device has coupling elements on the normal load is a positive connection between the first and second component, wherein at overload a coupling element, preferably via at least one angled edge, rotationally and linearly relative to the other coupling element movable and the positive connection can be canceled. In this second variant, not only the pure rotational overload movement is thus possible, but there is also a linear relative movement of the two components to each other. In this embodiment, it is preferably provided that at least one coupling element of a force accumulator, preferably by a plate spring, is subjected to a force.
    The coupling devices should be set so that the overload is at least 10%, preferably at least 15%, above the normal load, the normal load force being dependent on the size of the spindle (for example, this force could be between 5 and 20 kilonewtons).
    According to a further embodiment, a drive means, preferably a spindle nut, via which the first component, preferably the spindle, can be driven linearly be provided. In this case, it is preferably provided that the drive means carries out a rotational movement and, by means of a corresponding transmission mechanism (for example ball circulation), rotates this rotational position.
    Movement in a linear motion of the first component converts. Even with a normal load, it is provided that rotational forces can be transmitted to the first component by the drive means via friction. However, these low rotational forces are not sufficient to decouple the coupling devices. Rather, this takes place only with appropriate overload.
    Protection is also desired for an injection molding machine with a drive device according to the invention.
    Further details and advantages of the present invention will be explained in more detail below with reference to the description of the figures with reference to the exemplary embodiments illustrated in the drawings. Show:
    Fig. 1 Fig. 2 Fig. 3 Fig. 4 and Fig. 5 Fig. 6 to 8 an injection molding machine with a drive device, a drive device with a frictional coupling device, a drive device with a positive coupling device at normal load, a drive device with a positive coupling device at overload and schematic details of the positive coupling device.
    In Fig. 1, an injection molding machine 4 is shown, in which on a frame 16, the fixed platen 14 is mounted. On the frame 16, a guide 17 is also arranged, on which the end plate 15 is fixed and along which the movable platen 13 is movable. The movable platen 13 is moved linearly via a toggle mechanism 20 so that a cavity formed between the mold halves 18 of the tool is closed. The toggle mechanism 20 is driven by a drive device 3, wherein by the preferably motor drive means 12 in the form of a not detailed dargstellten spindle nut, the first component 1 (spindle) is linearly movable along the machine axis and a second component (crosshead) linearly drives. By this linear drive, the levers of the toggle mechanism 20 are accordingly ............................................................................................................................................................................ moved or pivoted so that the movable platen 13 moves along the spars 19. Especially when the drive device 3 is in end positions or other incorrect operations occur overloads that can cause damage in the various parts of the entire drive train between the drive means 12 and the mold halves 18. Since the damage in the linear movements are usually less serious due to the lower linear forces, it has been recognized in the invention, especially to protect the occurring during overload high rotational forces. These occur mainly in the region of the first component 1, since this can no longer continue to move linearly in a malfunction and thereby the frictional forces resulting from friction by the drive means 12 destructive especially on the connection between the first component 1 and the second component 2 can affect.
    In order to solve this problem, a first variant of a coupling device 5 is shown in FIG. In this case, the first component 1 (spindle) has a plurality of components at its end remote from the drive means, with a receiving element 22 being clamped between fastening means 24 and the first component 1 via a fastening element 24 (Allen screw). The fastening device 24 is connected to the first component 1 via the thread 25. On the receiving element 22 in turn is attached via the fastening elements 23 of the retaining ring 21. These components 1, 24, 22, 21 and 23 always move with each other under normal load N and overload Ü.
    On the second component 2 (crosshead), the flange 29 is additionally attached, to which the clamping element 30 can be screwed and fixed via the fastening means 39. The preferably annular friction element 27 is fastened to the tensioning element 30 via the fastening elements 28. In contrast, the likewise annular friction element 26 is fastened directly in the first component 1 via the fastening elements 40. In order to ensure the linear force transmission between the first component 1 and the second component 2, the clamping element 30 is screwed in until the receiving element 22 and the retaining ring 21 is clamped between the two friction elements 26 and 27, so that the friction surfaces 6 of the • # • ·
    Components 21 and 22 abut the friction surfaces 6 of the friction elements 26 and 27.
    At normal load N, the first component 1 moves linearly and - depending on the direction in which the linear force L is exerted by the drive means 12 - move the second component 2 in accordance with linear. However, as soon as an overload occurs Ü, which is noticeable in the first component 1 as unintentional high rotational force R, the weakest connection point in the entire drive train - namely the frictional connection between the friction surfaces 6 - - lifted and firmly connected to the first component 1 components can rotate about the axis A relative to the components fixedly connected to the second component 2. As soon as the high rotational forces R which have occurred due to the overload Ü decrease again and sink below the frictional force between the friction surfaces 6, a normal operation can again be run. Thus, due to the frictional coupling device 5, formed by the friction surfaces 6 of the friction elements 26 and 27 and the retaining ring 21 and the receiving element 22, no destruction in the connecting region between the first component 1 and the second component 2.
    3 to 8 show an embodiment of the present invention, in which instead of a frictional coupling device 5, a positive coupling device 5 is used.
    3, the first component 1 and the second component 2 are shown at normal load N act on the first component 1 in turn by a drive means 12, not shown, linear forces L on the first component 1. With the first component 1 is firmly connected Receiving element 31, which is firmly clamped on the fastening element 24 (Allen screw). On the receiving element 31, the coupling element 7 is attached via the fastening element 32, which is designed as a gear-shaped ring, wherein the teeth 33 engage in the teeth 33 of the coupling element 8, which is also designed as an annular gear. This coupling element 8 is again via an energy storage • • • • * «·« ··· Λ · * ** · «· ·» * · · · · · · «· ** 7 ......... ...... 11a in the form of disk springs, whereby this energy store 11a is supported on the spring base 38 firmly connected to the receiving element 31.
    On the second component 2 (crosshead), a coupling element 9, which is designed as an annular gear, is also fastened via the fastening element 37. About the teeth 33 and this coupling element 9 engages the teeth 33 of the coupling element 8 at. On the second component 2, the spring base 34 for the energy accumulator 11b is connected via the connecting element 35 and the fastening element 36. This energy storage 11b in the form of cup springs acts between the spring base 34 and the coupling element 8. The coupling elements 7, 8 and 9 together form the frictional coupling device 5.
    In Fig. 6 is suitable to see how the teeth 33 of the coupling elements 7 and 9 engage in the teeth 33 of the coupling element 8, wherein the teeth 33 aulweisen each side inclined flanks 10.
    If, as shown in FIG. 7, an overload Ü occurs in the form of a rotational force R originating from the first component 1, the coupling element 7 or 9 moves in the direction of rotation and thereby also slides away from the coupling element 8 in the linear direction L. This is achieved by the chamfered flanks 10.
    In FIG. 8, the high rotational force R has caused a complete separation and thus uncoupling of the coupling elements 7 and 9 from the coupling element 8. Accordingly, not only a rotational decoupling but also a partially linear decoupling of the coupling device 5 occurs in this embodiment variant. The rotational forces R not only have to overcome the frictional force between the flanks 10, but also work against the force accumulators 11a and 11b, as can be seen from FIGS. 4 and 5.
    FIG. 4 shows a case when the first component 1 can no longer move to the right. This results in an increased rotational force transmission from the drive means 12 ago in the first component 1 and its parts attached thereto.
    By a decoupling as shown in FIGS. 7 and 8, the coupling element 8 against the frictional force between the flanks 10 and against the force of the energy accumulator 11a as far to the right (or depending on the direction of rotation to the left) moves until the coupling device 5 completely decoupled is and the first component 1 together with its attached components can let the rotational forces R spin out without causing damage. The second component 2 moves while compressing the force accumulator 11a relative to the first component 1 to the right.
    In contrast, it is shown in Fig. 5, when coming from the left, a linear force L is exerted on the first component 1 together with its components. In the reverse manner, a force could also be exerted on the second component 2 from the right. As soon as this is the case, the coupling element 8 moves under compression of the energy accumulator 11b, whereby the coupling element 8 releases from the coupling element 9. As a result, the second component 2 moves relative to the first component 1 to the left. For a pure linear overload already sufficient energy storage 11a and 11b. However, when a mainly rotational overload occurs, the energy accumulators 11a and 11b alone can not prevent destruction. Rather, by the occurring in the flanks 10 rotational overload forces either the coupling element 7 or the coupling element 9 from the coupling element 8 (even overcoming the force of the energy storage 11a and 11b) are solved, so that in the case of FIG. 4, the coupling element not moved with the rotational forces of the first component 1 and in the case of FIG. 5, the coupling element 8 moves with the rotational forces of the first component 1. The second embodiment thus has the advantage that not only the decoupling according to the invention is made possible with rotary overload, but in addition to the rotational overload on a occurring in the connection region between the first component 1 and second component 2 purely linear overload is taken into account.
    Innsbruck, on May 24, 2012
    权利要求:
    Claims (9)
    [1]
    71568 22 / eh

    1. Drive device (3) for an injection molding machine (4), with - a first component (1), in particular a spindle, the linear can be driven, - a second component (2), in particular a crosshead, which is linearly movable from the first component (1), and - a coupling device (5) via which the first (1) and the second at a normal load (N) Component (2) are connected, wherein in one of the two components (1, 2) acting overload (Ü), the two components (1,2) are reversibly decoupled by the coupling device (5), characterized in that the first, linearly driven component (1) and rotational forces (R) act, only by the first component (1) on the coupling device (5) acting rotational forces (R) in case of overload (Ü), the coupling device (R) is decoupled.
    [2]
    2. Drive device according to claim 1, characterized in that after decoupling of the coupling device (R), the first component (1) relative to the second component (2) is rotatable.
    [3]
    3. Drive device according to claim 1 or 2, characterized in that the coupling device (5) friction surfaces (6) via which at normal load (N) the first (1) and the second component (2) are frictionally connected, wherein at overload (Ü) the friction surfaces (6) are rotatable relative to each other.
    [4]
    4. Drive device according to claim 1 or 2, characterized in that the coupling device (5) coupling elements (7, 8, 9) via which at Nomnallast (N) a positive connection between the first (1) and second component (2) is given , wherein at overload (Ü) a coupling element (7, 9), preferably via at least one angled edge (10), rotationally and linearly relative to the other coupling element (8) movable and the form-fitting can be canceled. • · · · ***** 71568 22 / eh • Λ · · · ** · * * • 2 · ♦ * * »* ···· · · · * * · · ··········· * · «* ·· *
    [5]
    5. Drive device according to claim 4, characterized in that at least one coupling element (8) by a force accumulator (11a, 11b), preferably by a plate spring, is subjected to a force.
    [6]
    6. Drive device according to one of claims 1 to 5, characterized in that the overload (Ü) is at least 10%, preferably at least 15%, above the normal load (N).
    [7]
    7. Drive device according to one of claims 1 to 6, characterized by a rotary drive means (12), preferably a spindle nut, via which the first component (1), preferably the spindle, is linearly driven.
    [8]
    8. Drive device according to claim 7, characterized in that from the rotary drive means (12) at overload (Ü) via friction rotational forces (R) to the first component (1) are transferable.
    [9]
    9. injection molding machines (4) with a drive device (3) according to one of claims 1 to 8. Innsbruck, 24 May 2012
    类似技术:
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    DE3111583C2|1992-07-16|
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    DE102011081556A1|2012-03-08|Electromechanical locking device, in particular electromechanical lock
    AT514629B1|2015-03-15|Drive device for an injection molding machine
    EP0281593B1|1990-01-31|Gearbox with overload safety clutch
    EP1772416B1|2009-07-01|Drive unit with two motors, in particular for a hoisting gear
    EP2776730B1|2015-07-15|Machine assembly
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    DE102020120064A1|2022-02-03|Using a ball screw and actuator assembly
    EP3828128A1|2021-06-02|Device for closing a container with a screw cap
    DE19515085C2|2000-01-20|Lowering lock for a preferably vertical slide of a machine tool
    AT506118A1|2009-06-15|DRIVE DEVICE FOR INJECTION MOLDING MACHINES WITH OVERLOAD PROTECTION
    DE4336446B4|2004-02-12|Actuator with a safety device
    WO2021234116A1|2021-11-25|Use of a ball screw drive, and actuating drive assembly
    同族专利:
    公开号 | 公开日
    AT512311B1|2013-07-15|
    DE102013006257B4|2017-11-09|
    DE102013006257A1|2013-11-28|
    CN103419325A|2013-12-04|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE3717692A1|1986-05-30|1987-12-23|Barmag Barmer Maschf|Clutch between the motor and gear in extruders|
    JPH05345337A|1992-06-16|1993-12-27|Sodick Co Ltd|Electrically-driven injection molding machine|
    DE2416234A1|1974-04-03|1975-10-16|Demag Kunststofftech|Worm screw feed injection moulding machine overload protector - formed by a gear in the shape of an overload clutch|
    SG83785G|1981-07-27|1989-12-22|Olofsson Corp|Lead screw overthrust protection|
    DE4236282C1|1992-10-28|1994-01-27|Karl Hehl|Screw coupling device on a plastic injection molding machine|
    JPH08183079A|1994-12-28|1996-07-16|Fanuc Ltd|Movable member-propelling mechanism of motor-driven injection molding machine|
    US5645868A|1995-11-17|1997-07-08|Cincinnati Milacron Inc.|Drive apparatus for an injection unit|
    DE19756157C1|1997-12-17|1999-04-15|Moenninghoff Gmbh & Co Kg Masc|Overload coupling for motor vehicle transmission shaft|
    JP3708769B2|1999-12-08|2005-10-19|日精樹脂工業株式会社|Molding device for injection molding machine|
    CN2604565Y|2002-11-22|2004-02-25|北京航空航天大学|Friction overdrive clutch|
    JP4454995B2|2003-09-19|2010-04-21|三菱重工プラスチックテクノロジー株式会社|Electric injection device|
    CN100582517C|2007-09-18|2010-01-20|洪涛|Compression type claw overrunning clutch|
    AT506118B1|2007-11-28|2010-01-15|Engel Austria Gmbh|DRIVE DEVICE FOR INJECTION MOLDING MACHINES WITH OVERLOAD PROTECTION|
    CN100586695C|2008-03-13|2010-02-03|华南理工大学|Dual-transmission function electrical injection molding system and molding method thereof|
    CN101585178B|2008-05-23|2011-01-05|谢智庆|Jugged component and hand tool with same|
    CN102009467B|2010-10-31|2013-12-11|华南理工大学|Single-motor-driven all-electric mold closing and moving system and implementation method and application thereof|CN106553316B|2015-09-25|2018-11-06|桦钦机械厂有限公司|The electric mode locking device of plastic injection machine|
    DE102017104000A1|2017-02-27|2018-08-30|EWIKON Heißkanalsysteme GmbH|Hot runner device with an overload protection device|
    AT522876B1|2020-01-21|2021-03-15|Engel Austria Gmbh|Injection unit for a molding machine and molding machine with such|
    法律状态:
    2022-01-15| MM01| Lapse because of not paying annual fees|Effective date: 20210525 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA616/2012A|AT512311B1|2012-05-25|2012-05-25|Drive device for an injection molding machine|ATA616/2012A| AT512311B1|2012-05-25|2012-05-25|Drive device for an injection molding machine|
    DE102013006257.8A| DE102013006257B4|2012-05-25|2013-04-11|Drive device for an injection molding machine|
    CN2013101963191A| CN103419325A|2012-05-25|2013-05-24|Driving device for an injection-moudling device|
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