• 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:
    An acoustic shielding car part (11) isolates a through-member passage (10). The automobile sound-proofing part (11) is an integral piece (11) having zones of different density and / or rigidity, so as to constitute lips (12, 13) to the through passage of the movable member (10).
    公开号:FR3028817A1
    申请号:FR1461424
    申请日:2014-11-25
    公开日:2016-05-27
    发明作者:Philippe Godano；Raphael Merrien
    申请人:Autoneum Management AG；
    IPC主号:
    专利说明:

    [0001] The invention relates to an automobile acoustic shielding part allowing the passage of movable or static member between the noise source and the receiver. The invention also relates to a method of manufacturing an automobile acoustic shielding part allowing the passage of movable or static member between the noise source and the receiver. The engine compartment is a significant source of noise, requiring a reduction of noise transmissions into the passenger compartment. For this purpose, acoustic insulation materials are placed inside the door panels, on the floor of the cabin, inside the dashboard, and especially between the engine compartment and the passenger compartment of the car, an insulation part commonly called apron insulation.
    [0002] In FIG. 1, a cabin floor 100 is covered with a carpet 1 of soil with acoustic properties. The separation deck between the engine compartment and the passenger compartment of the automobile is coated with an insulation of apron 3 with acoustic properties. This acoustically sounding deck insulation 3 extends inside the dashboard 4 to the cabin floor 100 and under the floor carpet 1. Between the deck insulation 3 and the panel 4, there is a hollow space or a cavity 5 in which there are known accessories and not shown in detail as the heating and air conditioning unit, and various pipes. This hollow space 5 is generally noisy due to the transmission of engine noise through the deck and acoustic leakage of the penetrations and acoustic repairs on the internal rigid walls of the dashboard 4. The board 4 is generally open at the bottom, the cavity 5 is thus connected to the passenger compartment.
    [0003] In this case, the acoustic insulation between the engine compartment and the passenger compartment of the car is degraded. The reduction of noise transmitted between the engine compartment and the passenger compartment of the automobile is obtained by a well-known technique, in particular by interposition of a part 6 called "under the dashboard" by the specialists. These parts 6 placed under the board 4 and above the feet of the driver and the front passenger, are used to plug the opening between the board 4 and the apron insulation 3 and constitute means of acoustic shielding .
    [0004] This well-known technique, however, encounters difficulties when a static member such as a transmission cable or a movable member such as a pedal assembly passes through the acoustic shielding means. In FIG. 1, a pedal assembly 2 that passes through the acoustic screening means 6 comprises a support 7 and a hinge 8 in the vicinity of the apron and the engine compartment, a pedal 9 in the passenger compartment and a pedal pedal lever 10. the sub-dashboard 6. The invention is particularly useful in its application to the manufacture of these parts 6 called "under the dashboard" by the specialists. A first, well-known, and conventional technique for making these acoustically soundproofing auto parts with passage functions, involves associating a rigid infused plastic support structure with a top layer of noise absorbing material. When a static member such as a transmission cable or a movable member such as a pedal through the acoustic shielding means, it is necessary to perform the corresponding function of passage. For this purpose, an opening is created which produces acoustic leaks and degrades the acoustic insulation of the screen. To remedy this, it is necessary to use specific sealing pieces comprising, for example, a thermoformed polyurethane foam assembled on the piece of rigid injected plastic material.
    [0005] A disadvantage of this state of the art is to require a complex and expensive manufacturing process, requiring assembly of several parts. In addition, a specific sealing piece thus obtained is not only heavy but also difficult to recycle. A second technique, for producing these acoustical shielding acoustic parts with passage functions, provides for the use of a thermoformed fibrous material having thick areas of acoustic absorption very little compressed and having thin edges which are strongly compressed opposite the penetrations or passages. This second technique has the advantage of being a lightweight solution. A disadvantage of this second state of the art is however that the specific sealing piece thus produced lacks rigidity. In the case of these highly compressed edges facing a movable member passage, it must also avoid any collision due to mounting tolerances, which requires to respect a significant gap between the screen 6 and the body mobile 10 of Figure 1.
    [0006] A disadvantage of this second state of the art is therefore that the specific sealing piece thus produced does not provide the desired sealing function at the bushings. A first object of the invention is to improve the known state of the art by providing a new lightened acoustic screening automobile part providing improved insulation of a static or movable organ passage, with a function of FIG. desired sealing at certain passages. A second object of the invention is to provide a new manufacturing method for producing an acoustic screening automobile part according to the invention, in an economical and ecological manner. The subject of the invention is an acoustically soundproofing automobile part made of fibrous material having zones of different density and / or rigidity comprising at least one static or movable body passage, characterized in that the zones of density the weakest are located opposite the passages crossing the room. According to other alternative features of the invention, the material used for the sound-proofing part according to the invention is preferably a thermoplastic felt having binding fibers and possibly filling fibers. The binding fibers may be selected from a group comprising single-component fibers or two-component fibers, in which the components may be a polyester, in particular polyethylene terephthalate (PET), a polyolefin, in particular polypropylene or polyethylene, a polylactic acid (PLA) or a polyamide (PA), in particular a polyamide 6 or a polyamide 6.6. The percentage of the binding fibers relative to the total weight of the material is preferably between 20 and 100.
    [0007] The filling fibers may be synthetic fibers or natural fibers, preferably recycled fibers or from a material derived from a recycling process. The recycled fibers are preferably in the group consisting of: frayed cotton, frayed synthetic material, frayed polyester, or frayed natural fibers. The frayed natural fibers represent at least 51% by weight of the filler material, while 49% of the filler material may be composed of fibers from other sources. A frayed polyester contains for example 51% by weight of polyester-based material.
    [0008] The frayed material may also be a mixture of natural and synthetic fibers, with no predominance of either type. The fibers may be short fibers or filaments of indefinite length. The filling fibers may be synthetic, preferably polyester, for example polyethylene terephthalate. A preferred material for producing the automotive part according to the invention can be made by a combination of two-component polyester comprising binding fibers and a polyester filler. This arrangement allows easy recycling of the automobile part according to the invention.
    [0009] Additional layers may be provided on the top or bottom of the automotive part, particularly nonwoven decorations, or decorative cover coatings. The automotive sound-proofing part according to the invention is a single piece of fibrous part in which the zones of the lowest density are located facing the members passing through the part, reducing or eliminating the gap between the said part. organ and the screen. With a reduced gap and absorption at the edges of the aperture, the acoustic performance of the screen is improved in the presence of the through members. The shape of the screen can be defined so that the low-density edge of the screen is at least partially in contact, with or without deformation of the edge, with the traversing member, when the member and the screen are mounted on the vehicle.
    [0010] In the case where the traversing member is movable, the cut-out in the screen must allow the complete movement of the member either by a minimum preferably constant interstice around the member or by a limited effort in case of contact. When the cut is smaller than the width of the through member, the workpiece deforms and the low density edges bend. In order to control the fold direction, it is preferable to create an angle between the low density edge and the adjacent compressed portion of the screen by thermoforming one side of the low density edge. This configuration is optimal for the sealing function of the screen in the presence of the member and simplifies assembly. In the case of a movable member, the relative movement between the member and the low density edges may be in the plane of the screen or perpendicular to the plane of the screen. In order to minimize the forces perpendicular to the plane of the screen and to avoid the folding of the edge and the screen, the shape of the flexible edge of the screen is defined so as to correspond with the trajectory of the point of contact of the screen. organ. Thermoforming one side of the low density edge enhances cohesion between the fibers and prevents fraying of the flexible edge when the thermoformed face is in contact with a member, particularly a movable member. The automotive sound-proofing part according to the invention may consist of a needled felt of initial mass per unit area of between 500 and 1500 g / m 2, preferably between 600 and 900 g / m 2. The material constituting the automotive acoustic screening part according to the invention may comprise polyester bonding fibers and polyester filling fibers. The automotive sound-proofing part according to the invention may comprise a zone of articulation of the low-density zones enclosing the passage of a movable member. The subject of the invention is also a process for manufacturing an automobile acoustic-shielding part according to the invention, comprising a step of hot molding a blank cut in a blank of material, characterized in that the method comprises a hot molding step that avoids heating the low density areas by defining a mold gap greater than the thickness of the material flank without contact with the tool. Preferably for creating an angle between the low density edge 20 and the adjacent compressed portion of the screen by thermoforming one side of the low density edge, the invention provides for forcing the contact between the material flank and the tool. hot only on one side of the low density edge. The thermoforming time of the part is chosen to heat only the low density edge at the surface, but is sufficient to consolidate the adjacent compressed portion of the screen. The method preferably comprises an intermediate demolding step and rapid transfer of the hot-molded blank to a cooling die, prior to a cutting step finalizing the shape and characteristics of the acoustic-shielding workpiece according to the invention. invention. The invention will be better understood from the following description given by way of nonlimiting example, with reference to the accompanying drawings, in which: FIG. 2 schematically represents a cross-sectional view of a first automobile part according to FIG. invention in interaction with an organ. Figure 3 schematically shows a cross-sectional view of a second automobile part according to the invention in interaction with a member. Figure 4 schematically shows a perspective view of a third automobile part according to the invention in interaction with a fixed member.
    [0011] Figure 5 schematically shows a perspective view of a fourth automotive part according to the invention in interaction with a movable member. Figure 6 schematically shows a top view along arrow VI of Figure 5 of an automobile part according to the invention in interaction with a movable member. Figure 7 schematically shows a sectional view along the line VII-VII of Figure 5 of a car part according to the invention in interaction with a movable member. Figure 8 shows schematically a perspective view of a fifth automobile part according to the invention in interaction with a movable member. Figure 9 schematically shows a sequence of manufacturing steps illustrating a manufacturing method according to the invention. In FIG. 2, a first automobile acoustic screening part according to the invention made of fibrous material, viewed in cross section, is generally designated 11. The automobile part 11 is shown in interaction with a movable member 10 such that a pedal lever, for example a clutch or brake pedal lever, a pull tab, or any similar member movable in translation or rotation. The automobile part comprises two thick lips or uncompressed portions 12 and 13 enclosing the pedal lever 10.
    [0012] The thick lips or uncompressed portions 12 and 13 are formed by cutting the fibrous material through a slot terminated by two conformations 12a, 13a spaced from the pedal lever 10. These thick lips or uncompressed portions 12 and 13 correspond to a low density of material remaining in its swelling state. The central zone corresponding to the thick lips or uncompressed portions 12 and 13 and to the slotted portion is of very low density: it advantageously corresponds to an uncompressed felt, preferably a needle felt with polyester binding fibers and essentially polyester filler fibers, with initial mass per unit area of between 500 and 1500 g / m 2, preferably between 600 and 900 g / m 2. This material is advantageous in that it allows easy recycling after use and re-insertion into a manufacturing process.
    [0013] The reduced interstice between the two conformations 12a, 13a and the pedal lever 10 and the absorption at the edges of the opening ensure good acoustic performance of the screen 11, including the passage of the pedal lever 10. The reduced gap between the two conformations 12a, 13a and the pedal lever 10 is preferably constant around the pedal lever 10 and thus allows its free and complete movement without contact and therefore without friction or parasitic effort. The central zone corresponding to the thick lips or uncompressed portions 12 and 13 and the slotted portion is bordered by a compressed edge 14 of the same fibrous material, unlike the second known technique using a thermoformed fibrous material having thick areas. acoustic absorption very little compressed and having thin edges strongly compressed opposite the crossings or passages of movable member.
    [0014] By way of example, the central zone corresponding to the slotted portion and to the thick lips or uncompressed portions 12 and 13 has a maximum thickness of between 5 and 20 millimeters, whereas the compressed zone 14 has a thickness of about from 1 to 5 millimeters.
    [0015] The compressed zone or border 14 may form an articulation of the central zone to facilitate the passage of the pedal lever 10 during assembly. The slot in the central zone may also extend to the edge of the automobile part 11 to facilitate the passage of the pedal lever 10 during assembly. Because the lips 12 and 13 are flexible and correspond to an uncompressed felted part, they are also laterally flexible, so that acoustic sealing is effective on both sides of the pedal lever 10. In FIG. 3, a second soundproofing automobile part according to the invention made of fibrous material, seen in cross section, is generally designated 21. The automobile part 21 is shown in interaction with a movable member 10 such that a pedal lever, for example a clutch or brake pedal lever, a pull tab, or any similar member movable in translation or rotation. The automobile part 21 comprises two thick lips or uncompressed portions 22 and 23 enclosing the pedal lever 10.
    [0016] The thick lips or uncompressed portions 22 and 23 are formed by cutting the fibrous material through a narrow slot terminated by two conformations 22a, 23a in tangential contact with the pedal lever. These thick lips or uncompressed portions 22 and 23 correspond to a low density of material remaining in its free-flowing state of very low density. The absence of gaps between the two conformations 22a, 23a and the pedal lever 10 and the absorption at the edges of the opening ensure good acoustic performance of the screen 21.
    [0017] The central zone corresponding to the thick lips or uncompressed portions 22 and 23 and to the slotted portion is bordered by a compressed edge 24 of the same fibrous material, unlike the second known technique using a thermoformed fibrous material having thick areas. acoustic absorption very little compressed and 3028817 10 having thin edges highly compressed opposite the bushings or passages of movable member. For example, the central zone corresponding to the slotted portion and the thick lips or uncompressed portions 22 and 23 has a thickness of between 5 and 20 millimeters, whereas the compressed zone 24 has a thickness in the order of 1 to 5 millimeters. The compressed zone or border 24 forms an articulation of the central zone to allow flexible mobility of the thick lips or uncompressed portions 22 and 23 during the movement of the pedal lever 10. The shape of the screen 21 is defined so that the zone of low density of the screen 21 is at least partially in contact, with deformation of the edge, with the traversing member 10, when the member and the screen are mounted on the vehicle.
    [0018] The central zone corresponding to the slotted portion is of very low density: it advantageously corresponds to an uncompressed felt, preferably a needle felt with polyester binding fibers and polyester filling fibers. This material is advantageous in that it allows easy recycling after use and re-insertion into a manufacturing process. As the slot between the two conformations 22a, 23a is narrower than the through member 10, the thick lips or uncompressed portions 22 and 23 of the part 21 deform. To control the direction of these deformations, an angle 26 is created under the conformations 22a, 23a in tangential contact with the pedal lever 10, by thermoforming only one side of the low density zone. This optimal angular configuration for the sealing function of the screen 21 in the presence of the movable member 10 also simplifies its mounting.
    [0019] Thermoforming a single side of the low density zone strengthens the cohesion between the fibers and avoids fraying of the soft edges, when the thermoformed side is in contact with the movable member 10.
    [0020] The thermoformed face of the acoustic shielding car part 21 according to the invention comprises an interface 25 which extends under the underside and on the inner edges of the lips 22 and 23 coming into contact with the pedal lever 10.
    [0021] This interface 25 is a resistant interface having an anti-abrasion function during the movement of the pedal lever 10 in contact with the lips 22 and 23. This interface 25 is glazed on the surface, so as to allow sliding and good resistance of the lips 22 and 23 in contact with the pedal lever 10 and prevent fraying of the lips 22 and 23 by the friction of the pedal lever 10. The sliding of this interface 25 on the movable member 10 thus avoids damaging the outer and upper portions of the thick lips 2 and 3 corresponding to an uncompressed felt surface and produces a limited contact force on the movement of the lever 10 pedal. In FIG. 4, a third soundproofing automobile part according to the invention is designated as a whole by 31. The automobile part 31 is shown in interaction with a fixed member 10a such as a cable. thick central 32 enclosing cable 10a. This thick central zone 32 corresponds to a low density of uncompressed fibrous material. Contiguous slots 33 are formed in the material of the thick central zone 32. The thick central zone 32 is shaped to give good flexibility when mounting the cable 10a, while ensuring a good seal around the cable 10a after mounting. The central zone 32 is of very low density: it advantageously corresponds to an uncompressed felt, preferably a needle felt with polyester binding fibers and polyester filling fibers. This material is advantageous in that it allows easy recycling after use and re-insertion into a manufacturing process.
    [0022] The central zone 32 is bordered by a first compressed peripheral zone 34. The first peripheral zone 34 is compressed so as to maintain the thick central zone 32 around the cable 10a. For example, the thick central zone 32 has a thickness of between 5 and 20 millimeters, while the compressed zone 34 has a thickness of the order of 1 to 2 millimeters. The first peripheral zone or peripheral edge 34 surrounding the central zone 32 is bordered by a second compressed peripheral zone 35, typically having a thickness of between 2 and 5 millimeters. This second peripheral zone 35 can serve to fix the automobile part 31 according to the invention in position, so as to constitute a sub-dashboard. With reference to FIGS. 5 to 7, a fourth automobile acoustic-shielding part according to the invention is generally designated 41. The automobile part 41 is shown in interaction with a movable member 10 such as a pedal lever. for example a clutch or brake pedal lever, a pull tab, or any similar member movable in translation or rotation. The automobile part comprises two thick lips 42 and 43 enclosing the pedal lever 10. These thick lips 42 and 43 are formed by cutting the material by a slot terminated by at least one transverse conformation, for example a V-shaped conformation. The assembly thus cut is shaped to give good flexibility when moving the pedal lever 10, while ensuring acoustic sealing on both sides of the pedal lever 10.
    [0023] The central zone of these thick lips 42 and 43 corresponding to the split portion is of very low density: it advantageously corresponds to an uncompressed felt, preferably a needle felt with polyester binding fibers and polyester filling fibers. . This material is advantageous in that it allows easy recycling after use and re-insertion into a manufacturing process. The central zone corresponding to the lips 42 and 43 is bordered by a first compressed peripheral zone 44.
    [0024] The first peripheral zone 44 is compressed so as to constitute a hinge or articulation allowing pivoting and opening up of the lips 42 and 43 during the displacement of the pedal 10. By way of example, the corresponding central zone the slotted portion 10 and the lips 42 and 43 has a thickness of between 5 and 20 millimeters, while the compressed zone 44 has a thickness of the order of 1 to 2 millimeters. The first peripheral zone or peripheral edge 44 forming the articulation of the central zone is bordered by a second compressed peripheral zone 45, typically having a thickness of between 2 and 5 millimeters. This second peripheral zone 45 can be used to fix in position the automobile part 41 according to the invention. Because the lips 42 and 43 are flexible and correspond to an uncompressed felted part, they are also laterally flexible, so that the seal is effective on either side of the pedal lever 10 as seen on Figure 6. Thus, the flexible lips 42 and 43 deform transversely to the passage of the pedal lever 10 and close again after the passage of the pedal lever 10. In FIG. 7, the acoustic-shielding automobile part according to the invention comprises a thin skin 46 which extends under the underside and on the inner edges of the lips 42 and 43 coming into contact with the pedal lever 10.
    [0025] This thin skin 46 is a stiffened skin to have an anti-abrasion function during the movement of the pedal lever 10 in contact with the lips 42 and 43. This stiffened skin 46 has a thickness typically between 0.2 and 0.6 millimeters , so as to allow good hold of the lips 42 and 43 in contact with the pedal lever 10 and prevent fraying of the lips 42 and 43 by the friction of the pedal lever 10. This thin skin 46 slightly deforms in contact with the pedal 10 to present a rounding as can be seen in FIG. 7, while it resumes an angular shape behind and in front of the pedal lever 10, thus closing the the gap between the thick lips 42 and 43. Thus, during the displacement of a movable member, for example the pedal lever 10, the abrasion-resistant skin 46 has sufficient flexibility to adapt to the contour of the lever 10 pedal and let the thick lips 42 and 43 close on either side of the pedal lever 10. The sliding of this thin skin 46 on the movable member 10 thus avoids damaging the outer and lower portions of the thick lips 42 and 43 corresponding to a non-compressed felt surface. In FIG. 8, a fifth acoustically soundproofing vehicle part according to the invention, seen in cross-section, is generally designated 51. The automobile part 51 is shown in interaction with a movable member 10 such that a pedal lever, for example a clutch or brake pedal lever, a pull tab, or any similar member movable in translation or rotation. The automobile part 51 has a central slotted zone, with two thick lips 52 and 53, of very low density and advantageously corresponding to an uncompressed felt. The central zone corresponding to the lips 52 and 53 is bordered by two cylindrical edges 54 of compressed material. The two cylindrical edges 54 of compressed material are extended laterally by two flanges 55.
    [0026] By way of example, the central zone corresponding to the slotted portion and to the lips 52 and 53 has a thickness of between 5 and 20 millimeters, while each cylindrical edge 54 of compressed material has a thickness of the order of 1 to 5 millimeters.
    [0027] Each rim 55 can be used to fix in position the automotive part 51 according to the invention. In the case of a movable member 10 rotatably mounted on an axis 10b, the central axis of the cylindrical shapes 54 on the axis 10b is chosen so as to avoid any radial force on the lips 52 and 53 of low density and thus to avoid their fraying, deformation and / or deformation of the automobile part 51 according to the invention. Thus, by matching the trajectory of the point of contact of the member with the curvature of the flexible edges 52, 53 of the screen 51 in contact with the member 10, the relative movement between the member 10 and the lips 52 and 53 of low density occurs at constant radius. The forces perpendicular to the surface of the screen 51 are thus canceled, so that any risk of folding or radial deformation of the flexible edges 52, 53 of the screen 51 and the screen 51 itself are avoided.
    [0028] Of course, the invention is applicable to all kinds of fibrous materials, in particular of the kind felt, needled or not, comprising a single component or comprising a plurality of components with binding fibers or filling fibers. The essential thing is to be able to manufacture the automobile part according to the invention in one piece from a blank of a previously prepared material, so as to simplify the manufacture and to avoid any problem of assembly of two parts. different, thus overcoming the disadvantages of the prior art. Providing compressed areas and uncompressed areas allows the soundproofing and acoustic shielding properties to be modulated according to the sound properties required in the passenger compartment. The automotive soundproofing part according to the invention can also be adapted to the sound signature of the engine compartment, to mitigate it in the manner chosen by the manufacturer of the motor vehicle or desired by the customer. The invention applies to all kinds of acoustic screens with fixed or movable member passage, so as to achieve properties close to automotive acoustic insulation parts, having no fixed or movable body passage or cable. Of course, the invention applies to all kinds of felt-like or needled materials comprising a single component or comprising a plurality of components with bonding fibers or filling fibers. The essential thing is to be able to manufacture the automobile part according to the invention in one piece from a blank of a previously prepared material, so as to simplify the manufacture and to avoid any problem of assembly of two parts. different, thus overcoming the disadvantages of the prior art. In Figure 9, a manufacturing line is schematically shown. The manufacturing process begins in step A by placing a blank of material in a hot mold comprising a central recessed portion to avoid compressing the central portion of the blank. The hot molding of the blank forms peripheral areas compressed and thermoformed to predetermined values imposed by the shape of the hot mold. To create an angle between the low density zone and the compressed and thermoformed peripheral zones and to force the contact between the material flank and the hot tool only on one side, the central lower part of the mold has a central protuberance forming a unilateral thermoforming. The thermoforming time of the room is chosen to heat only the low density area on the surface, while still sufficient to consolidate the adjacent compressed portion of the screen. The hot mold insert having a recessed central portion to avoid compressing the central portion of the workpiece is provided with compressed and thermoformed edges at predefined areas comparable to the areas described with reference to FIGS. 2-8.
    [0029] Upon exiting the hot molding, the automobile part in the form of a blank with compressed and thermoformed zones does not yet have any slits or internal lips released. After hot forming in the mold, the process continues with rapid demolding and transfer. This rapid demolding and transfer step is preferably carried out in a time interval of less than 30 seconds, advantageously of the order of 15 seconds. The demolded and transferred part is then placed in a step B in a cooled cold die and is then held for a predetermined time corresponding to sufficient cooling to stiffen the part and give it a definitive shape. After leaving the cold matrix, the room becomes a room with compressed and thermoformed areas. After leaving the cold room, the process continues in a step C of making the slots corresponding to the creation of lips contiguous or not in the central area of uncompressed felt. This embodiment of the slots can be performed by cutting by means of a blade, a shear cutting tool, a laser, a water jet or any other suitable cutting means.
    [0030] The central groove and the transverse grooves can be made simultaneously in the workpiece. The slot or slots in the central area of uncompressed felt may open outwards or to the edge of the room. Finally, the process terminates in step D of packaging and conditioning of the acoustic shielding automobile parts according to the invention completed in containers or delivery packages before delivery to a car manufacturer's site. The invention described with reference to a particular embodiment is in no way limited thereto, but on the contrary covers any modification of form and any variant embodiment within the scope and spirit of the appended claims. The essential is to provide lips of very low density around a movable member such as a pedal lever or around a fixed member such as a control cable.
    [0031] An anti-abrasion function avoids the deterioration of the unstressed or unstressed moving lips when they are in contact with a traversing body, and in particular by constituting a stiffened anti-abrasion skin of slight thickness in contact with the body. movable member 5 to surround.
    权利要求:
    Claims (27)
    [0001]
    REVENDICATIONS1. Automotive acoustic screening part made of fibrous material having zones of different density and / or stiffness and comprising at least one fixed or movable through-body passage (10, 10a), characterized in that a zone of low density is located at the passage crossing the car part.
    [0002]
    2. Automobile part according to claim 1, characterized in that a low density zone is an uncompressed zone of fibrous material and in that the low density zone comprises thick lips separated by a slot corresponding to the passage. through member (10, 10a).
    [0003]
    3. Automobile part according to claim 2, characterized in that the low density area located at the passage through the workpiece comprises thick lips (12, 13) which are spaced from the member through a gap of reduced width.
    [0004]
    4. Automobile part according to claim 2, characterized in that the low density zone located at the passage through the workpiece comprises thick lips (22, 23) which are in contact with the body through.
    [0005]
    5. Automobile part according to claim 4, characterized in that the thick lips (22, 23) are in tangential contact with the traversing member and in that the thick lips (22, 23) have an angle (26). imposing the direction of their deformations during the movement of the traversing organ.
    [0006]
    6. Automotive part according to claim 1, adapted for isolating a passage of a member (10) movable, characterized in that the low density area located at the passage through the automobile part comprises lips (42, 43) thick flexible formed in an uncompressed area and which are delimited by a longitudinal groove terminated by two transverse grooves.
    [0007]
    7. Automobile part according to claim 1, adapted to the insulation of a passage of a member (10a) fixed, characterized in that the zone 3028817 20 low density (32) located at the passage through the automobile part comprises contiguous slots (33).
    [0008]
    8. Automobile part according to claim 1, adapted for isolating a passage of a member (10) movable rotating, characterized in that the low density zone located at the passage through the workpiece has a cylindrical curvature , whose central axis substantially corresponds to the axis (10b) of rotation of the movable member (10), to avoid any radial force on the low density area and thus prevent deformation or fraying. 10
    [0009]
    9. Automobile part according to claim 1, characterized in that the low density area is bordered by a zone (14, 24, 34, 44, 54) compressed of higher density.
    [0010]
    10. Automotive part according to claim 9, characterized in that the area (24, 44) compressed higher density comprises a thick lip joint area to a movable member passage.
    [0011]
    11. Automobile part according to claim 1, characterized in that the acoustic shielding car part is an integral piece and having areas of different density and / or rigidity, the lips (42, 43) and an abrasion-resistant skin (46) in contact with the through member (10).
    [0012]
    12. A method of manufacturing a soundproofing automobile part according to any one of the preceding claims, comprising a step (A) of hot molding a blank of material, characterized in that the hot molding of the The blank is made in a mold having a recessed central portion to avoid compressing the central portion of the blank.
    [0013]
    13. The manufacturing method according to claim 12, characterized in that the hot molding of the blank is carried out in a mold having a central protuberance to give an angular shape to the central part of the blank.
    [0014]
    14. The manufacturing method according to claim 12 or claim 13, characterized in that the method comprises a step (B) cooling in a matrix fixing the final shape of the workpiece during cold cooling. 3028817 21
    [0015]
    15. The manufacturing method according to claim 12, characterized in that the method comprises a step (C) of cutting slots in the low density area located at the passage through the automobile part. 5
    [0016]
    16. Use for the manufacture of a soundproofing automobile part according to any one of claims 1 to 11 of a fibrous material or felt of thermoplastic material comprising substantially filling fibers and connecting fibers.
    [0017]
    17. The use for the manufacture of an acoustic screening automobile part according to claim 16 of a fibrous material, wherein the bonding fibers are selected from a group comprising: single-component fibers or two-component fibers, wherein The components may be a polyester, in particular a polyethylene terephthalate (PET), a polyolefin, in particular a polypropylene or a polyethylene, a polylactic acid (PLA) or a polyamide (PA), in particular a polyamide 6 or a polyamide 6.6.
    [0018]
    18. Use for the manufacture of a soundproofing automobile part according to one of claims 16 or 17 of a fibrous material, wherein the percentage of the binding fibers with respect to the total weight of the material is preferably included between 20 and 100%.
    [0019]
    19. The use for the manufacture of an automotive acoust-ktue automotive part according to any one of claims 16 to 18 of a fibrous material, wherein the filling fibers are selected from a group comprising: fibers synthetic and / or natural fibers, preferably recycled fibers or from a material from a recycling process.
    [0020]
    20. The use of a fibrous material comprising recycled fibers selected from the group consisting of: frayed cotton, frayed synthetic material, frayed polyester or fibers for the manufacture of a sound-shielding automobile part according to claim 19. natural frayed.
    [0021]
    21. The invention relates to a method for producing an acoustically soundproof automobile part according to claim 20, in which the frayed natural fibers represent at least 51% by weight of the filling material, while 49% of the material is filled with fibrous material 3028817. filling can be composed of fibers from other sources. 5
    [0022]
    22. Use for the manufacture of a soundproofing automobile part according to any one of claims 1 to 11 of a fibrous material comprising short fibers.
    [0023]
    23. Use for the manufacture of a soundproofing automobile part according to any one of claims 1 to 11 10 of a fibrous material comprising filaments of indefinite length.
    [0024]
    24. Use for the manufacture of an automotive acoustic blanking part according to any one of claims 1 to 11 of a fibrous material comprising a combination of two-component polyester comprising binding fibers and a polyester filling, for example polyethylene terephthalate.
    [0025]
    25. Use for the manufacture of a soundproofing automobile part according to any one of claims 1 to 11 of a fibrous material in which the low density zone is subjected to one-sided thermoforming on one side, to enhance the cohesion between the fibers and avoid fraying.
    [0026]
    26. Use for the manufacture of a soundproofing automobile part according to any one of claims 1 to 11 of a fibrous material consisting of a felt of initial mass density between 500 and 1500g / m2, preferably between 600 and 900g / m2.
    [0027]
    27. Use for the manufacture of a soundproofing automobile part according to any one of claims 1 to 11 of a fibrous material having a thickness of between 5 and 20 millimeters in its swelling state, and able to be compressed up to at a thickness of the order of 1 to 5 millimeters.
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    同族专利:
    公开号 | 公开日
    CN107073801A|2017-08-18|
    WO2016083398A1|2016-06-02|
    EP3224086A1|2017-10-04|
    FR3028817B1|2018-03-02|
    US10427625B2|2019-10-01|
    US20170259757A1|2017-09-14|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE19508968A1|1995-03-13|1996-09-19|Daimler Benz Ag|Damping module for insulating passenger car interior against engine noise|
    DE10143167A1|2001-09-04|2003-03-27|Hp Chem Pelzer Res & Dev Ltd|Heat-insulating and sound-absorbing lining for engine compartment of motor vehicles, has microperforated heat reflector in contact with polyurethane foam layer on engine side and cover layer facing away from engine side|
    DE20120923U1|2001-12-20|2002-06-06|Sachsenring Fahrzeugtechnik Gm|Cover for a hand brake lever gap of a motor vehicle|
    DE102007020832A1|2007-05-02|2008-11-13|Bayer Materialscience Ag|Lightweight, sound-insulating panel for a body part of a motor vehicle and method for its production|
    FR3010026A1|2013-08-30|2015-03-06|Peugeot Citroen Automobiles Sa|ACOUSTIC PROTECTION DEVICE WITH OPENING EQUIPPED WITH PROTECTIVE WIRES FOR THE PASSAGE OF A MOBILE CONTROL MEMBER OF A VEHICLE|
    FR3012557A1|2013-10-31|2015-05-01|Cera|ACOUSTIC SEAL|
    DE2526325C2|1975-06-12|1987-10-22|Daimler-Benz Ag, 7000 Stuttgart, De|
    US6951263B2|2000-04-12|2005-10-04|Carcoustics Tech Center Gmbh|Sound absorber, especially for motor vehicles, and a method for producing a sound absorber|
    DE10334274B3|2003-07-25|2005-03-03|Carcoustics Tech Center Gmbh|Sound-insulating composite part and method for its production|
    WO2005021334A1|2003-08-25|2005-03-10|Cascade Engineering, Inc.|Dashmat with component bridge|
    WO2005021335A1|2003-08-25|2005-03-10|Cascade Engineering, Inc.|Dashmat with component gap seal|
    US6981737B2|2003-11-26|2006-01-03|Denso International America, Inc.|Double plate heater pipe seal to dash|
    DE102006009134B4|2006-02-24|2016-03-24|Bayer Materialscience Aktiengesellschaft|Improved process for producing a lightweight, soundproofing panel for automobiles and related trim|
    CN101934785B|2009-06-26|2015-05-13|福特有限公司|Cover for an aperture|
    CN202063093U|2011-02-25|2011-12-07|温州市环球汽车衬垫有限公司|Automobile cab internal front wall sound insulating pad|
    JP4828658B1|2011-03-14|2011-11-30|株式会社タケヒロ|Sound insulation for vehicles|
    JP5701665B2|2011-04-12|2015-04-15|豊和繊維工業株式会社|Dash silencer mounting structure|
    CN102310613B|2011-05-28|2013-11-06|无锡吉兴汽车声学部件科技有限公司|Method for producing front wall sound insulation pad of automobile driving cabin|
    US8888174B2|2013-03-11|2014-11-18|GM Global Technology Operations LLC|Pass-through element for a motor vehicle front of dash system|
    CN203485853U|2013-09-13|2014-03-19|周振华|Double-component car front wall deadening felt capable of being formed|FR3047699B1|2016-02-17|2019-08-02|Peugeot Citroen Automobiles Sa|ACOUSTIC PROTECTION DEVICE FOR THE DASHBOARD OF A MOTOR VEHICLE|
    DE102018009633A1|2018-01-12|2019-07-18|Sew-Eurodrive Gmbh & Co. Kg|Drive comprising an electric motor with brake, fan cover and rod for manual brake application and method of manufacturing a drive|
    JP2019142373A|2018-02-21|2019-08-29|トヨタ自動車株式会社|vehicle|
    JP2019202688A|2018-05-24|2019-11-28|トヨタ自動車株式会社|Structure for suppressing noise to vehicle cabin|
    法律状态:
    2015-11-19| PLFP| Fee payment|Year of fee payment: 2 |
    2016-05-27| PLSC| Publication of the preliminary search report|Effective date: 20160527 |
    2016-11-18| PLFP| Fee payment|Year of fee payment: 3 |
    2017-11-21| PLFP| Fee payment|Year of fee payment: 4 |
    2019-11-20| PLFP| Fee payment|Year of fee payment: 6 |
    2020-11-20| PLFP| Fee payment|Year of fee payment: 7 |
    2021-11-22| PLFP| Fee payment|Year of fee payment: 8 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1461424A|FR3028817B1|2014-11-25|2014-11-25|AUTOMOBILE ACOUSTIC ECRANTAGE PIECE AND METHOD FOR MANUFACTURING THE SAME|
    FR1461424|2014-11-25|FR1461424A| FR3028817B1|2014-11-25|2014-11-25|AUTOMOBILE ACOUSTIC ECRANTAGE PIECE AND METHOD FOR MANUFACTURING THE SAME|
    US15/529,306| US10427625B2|2014-11-25|2015-11-24|Automobile part for acoustic screening and its production process|
    CN201580063030.XA| CN107073801A|2014-11-25|2015-11-24|Automotive component and its manufacturing process for acoustic shielding|
    EP15800806.0A| EP3224086A1|2014-11-25|2015-11-24|Automobile part for acoustic screening and its production process|
    PCT/EP2015/077542| WO2016083398A1|2014-11-25|2015-11-24|Automobile part for acoustic screening and its production process|
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