JP5646189B2 - Manufacturing equipment for interior parts for vehicles - Google Patents

Description

  The present invention relates to a vehicle interior part manufacturing apparatus using a vacuum forming method, and more particularly, to a vehicle interior part manufacturing apparatus provided with means for facilitating release from a mold.

  Many of the interior parts that are used by being mounted in the interior of an automobile are configured by attaching a decorative skin to a synthetic resin core. Further, as a method of attaching the skin to the core material, a vacuum forming method is known in which a synthetic resin skin softened by heating is adsorbed to the surface of the core material (for example, Patent Document 1). reference).

  8 to 11 show a general outline of a vacuum forming apparatus using a vacuum forming method. As shown in FIG. 8, in the conventional vacuum forming method of the skin material, a sheet-like skin material 13 held by the skin gripping frame 12 is disposed above the vacuum forming device 11, and a resin core material 14 (described later) 10 and 11 is raised toward the skin material 13 (or the skin material 13 held by the skin gripping frame 12 is lowered), and the skin material 13 is made to be the resin core material 14. It is designed to be attached so that it can be covered.

  At this time, as shown in FIG. 9, the skin material 13 is preliminarily heated by the heater device 16 and subjected to the softening process, and then disposed above the vacuum forming device 11. The softened skin material 13 can be stuck along the shape of the resin core material 14. Further, the back surface of the skin material 13 is coated with a hot-melt type adhesive, and an adhesive force is generated by heating, whereby it becomes possible to adhere to and integrate with the surface of the resin core material 14. .

  The configuration of the conventional vacuum forming apparatus 11 will be further described with reference to FIGS. 10 and 11. FIGS. 10 and 11 are diagrams schematically showing a cross section of a portion corresponding to the line BB in FIG. 10 shows a state in which the skin material 13 is adhered to the resin core material 14, and FIG. 11 shows that the resin core material 14 is removed from the mold 17 after the skin material 13 is adhered to the resin core material 14. FIG.

  In the molding step shown in FIG. 10, the internal space 19 of the molding die 17 is decompressed by the vacuum pump 18 disposed inside the support housing 15 of the vacuum molding apparatus 11, and the suction holes of the molding die 17 and the entire surface of the resin core material 14 are formed. The skin material 13 is adsorbed through the fine holes provided in the surface. Thereby, the skin material 13 adheres to the surface of the resin core material 14 without generating an air reservoir.

  In the molding step of removing the resin core material 14 from the molding die 17 in FIG. 11, the vacuum pump 18 is stopped to return the space 19 in the molding die 17 to atmospheric pressure, and then the support housing 15 is moved by the drive cylinder 20. By lowering, the resin core material 14 bonded and integrated with the skin material 13 is removed from the mold 17.

  Further, in this vacuum forming method, in the state in which the skin material 13 is adhered to the resin core material 14 (see FIG. 10), the adhesive is coated on the back surface side of the skin material 13, so The skin material 13 is also bonded to the upper surface of the peripheral support housing 15. Usually, in order to release the skin material 13 from the upper surface of the support housing 15, a release tape 21 such as a Teflon (registered trademark) tape is applied to the upper surface portion of the support housing 15 in contact with the skin material 13, Alternatively, a release agent such as silicon resin is coated. For this reason, in the vacuum forming apparatus 11 shown in FIG. 11, a release cylinder 22 is further provided inside the support housing 15, and the skin material 13 is pushed up to promote release.

JP 2001-179759 A

  However, the conventional method of applying the releasable tape 21 such as Teflon (registered trademark) tape and the method of coating the release agent are poor in durability, so maintenance work such as frequent tape replacement This is a factor that reduces productivity.

  The present invention has been made in view of such problems, and air is directly blown onto the back surface of the skin material coated or laminated with an adhesive to cool the adhesive layer, thereby weakening the adhesive strength of the adhesive. Another object of the present invention is to provide an apparatus for manufacturing an interior part for a vehicle having a structure that facilitates release of the skin material.

  In order to solve the above problems, a vehicle interior part manufacturing apparatus according to the present invention is a manufacturing apparatus for attaching a skin material having an adhesive layer formed on a resin core of a vehicle interior part, Molding is promoted by supplying air to the back surface of the peripheral part of the skin material provided along the outer periphery of the molding die to which the resin core material is attached and the molding die. An air supply unit and an air supply system connected to the air supply unit are provided.

  Thereby, the maintenance of the vacuum forming apparatus according to the skin material releasing means mainly maintains the capacity of the air supply unit. Since the air supply unit is more durable than the conventional method, the number of maintenance operations can be reduced, and productivity can be improved. In addition, since air is directly supplied to the adhesive surface of the skin material, the adhesive layer is cooled to show a remarkable effect in reducing the adhesive force, and the mold release that has been difficult in the conventional method becomes easy. Furthermore, the peeling cylinder etc. which were required with the conventional apparatus can be abbreviate | omitted, and it becomes possible to attach another effective component instead of this peeling cylinder.

  In the vehicular interior part manufacturing apparatus according to the present invention, the air supply unit has a plurality of ejection holes for ejecting air supplied from the air supply system.

  According to this configuration, air can be ejected from a specific portion using the ejection hole, so that the air supply can be easily controlled and air can be ejected effectively.

  In the vehicular interior part manufacturing apparatus according to the present invention, the air supply unit includes an air flow path provided in an outer peripheral portion of the molding die.

  According to this configuration, air can be easily supplied to the outer periphery of the mold through the air flow path provided on the outer periphery of the mold.

  According to the vehicle interior part manufacturing apparatus according to the present invention, air is blown directly on the back surface of the skin material coated or laminated with the adhesive to cool the adhesive layer, and the adhesive strength of the adhesive is weakened. This has the effect of facilitating mold release.

It is a schematic diagram which shows the vacuum forming apparatus which concerns on this invention with the skin material attached to the skin holding frame. It is a figure which shows typically the cross section of the vacuum forming apparatus which concerns on this invention. FIG. 3 is a partially enlarged view of the vacuum forming apparatus shown in FIG. 2. It is explanatory drawing which shows the embodiment of the vacuum forming apparatus which concerns on this invention. It is explanatory drawing which shows the embodiment of the vacuum forming apparatus which concerns on this invention. It is explanatory drawing which shows the embodiment of the vacuum forming apparatus which concerns on this invention. It is a schematic diagram which shows the modification of the support housing | casing used with the vacuum forming apparatus which concerns on this invention. It is a schematic diagram explaining the outline | summary of the conventional vacuum forming apparatus. It is explanatory drawing which shows an example of the preliminary process in a vacuum forming method. It is a mimetic diagram showing the section of the conventional vacuum forming device in the state where the skin material is stuck on the resin core material. It is a schematic diagram showing a cross-section of a conventional vacuum forming apparatus in a state where the resin core material is removed from the mold after the skin material is adhered to the resin core material.

  Hereinafter, an embodiment of a vehicle interior part manufacturing apparatus according to the present invention will be described in detail with reference to the drawings. Throughout the description of the embodiment, the same elements as those in the conventional vacuum forming apparatus shown in FIGS.

  FIG. 1 is a schematic view showing a vacuum forming apparatus 11 as an embodiment of a vehicle interior part manufacturing apparatus according to the present invention, together with a skin material 13 attached to a skin gripping frame 12. 2 is a diagram schematically showing a cross section of a portion corresponding to the line AA in FIG. 1, and FIG. 3 is a partially enlarged view of FIG.

  1 to 3, in the vacuum forming method using the vacuum forming apparatus 11, a sheet-like skin material 13 held by the skin gripping frame 12 is disposed above the vacuum forming apparatus 11 (see FIG. 1). The support housing 15 to which a resin core material 14 (FIGS. 4, 5, and 6) to be described later is attached is raised toward the skin material 13 (or the skin material 13 held by the skin gripping frame 12 is lowered). Then, the resin core material 14 is attached so as to cover the resin core material 14, and then the support housing 15 is lowered to remove the resin core material 14 from the mold 17. As a result, the resin core material 14 and the skin material 13 are integrated in a predetermined shape to be an interior part for a vehicle.

  In the support housing 15, a plurality of air ejection holes 24 for ejecting air from the upper surface of the support housing 15 are arranged at appropriate intervals around a molding die 17 on which the outer peripheral portion of the skin material 13 is disposed. Is provided. In addition, a vacuum pump 18 is disposed inside the support housing 15, and an air pipe 23 is disposed corresponding to the air ejection hole 24.

  The vacuum pump 18 performs vacuum forming by evacuating the internal space 19 of the mold 17 and reducing the pressure.

  On the other hand, the air pipe 23 forms a flow path of air ejected from the air ejection holes 24, and a plurality of air ejection nozzles 25 are provided corresponding to the respective air ejection holes 24. The air pipe 23 is disposed in a state where each air ejection nozzle 25 is inserted into the corresponding air ejection hole 24. And in the air piping 23, the air of predetermined pressure is ejected from the upper surface of the support housing | casing 15 through each air ejection hole 24 from each air ejection nozzle 25, These air piping 23, the air ejection nozzle 25, and an air ejection hole 24 constitutes an air supply section 26 of the vacuum forming apparatus 11.

  The air pipe 23 is connected to an air compressor 29 that is an air supply system provided outside the support housing 15 via an air hose 27 and an opening / closing valve 28. The opening / closing control of the opening / closing valve 28 and the start / stop of the air compressor 29 are controlled by receiving an open / close signal and an ON / OFF signal from a control unit (not shown), respectively. The on-off valve 28 and the air compressor 29 may be provided in the support housing 15, and means other than the air compressor 29 may be used as the air supply system.

  4 to 6 schematically illustrate a vacuum forming process in which a skin material 13 having an adhesive layer formed on the back surface is adhered to the front surface of the resin core material 14 using the vacuum forming apparatus 11 according to the present invention. It is explanatory drawing shown. Hereinafter, the vacuum forming procedure will be described in the order of FIGS.

  FIG. 4 shows a state in which the resin casing 14 is mounted on the mold 17 and the support housing 15 driven by the drive cylinder 20 is being raised toward the skin member 13 held by the skin gripping frame 12. Yes. As described above, the skin material 13 is heat softened by the heater device 16. On the other hand, the internal space 19 of the mold 17 is decompressed by the vacuum pump 18, and the resin core material 14 is adsorbed through suction holes (not shown) provided in the mold 17.

  In addition, the resin core material 14 here needs to have air permeability in order to vacuum-suck the skin material 13, and for example, a general-purpose thermoplastic resin such as polypropylene resin, polyethylene resin, ABS resin or the like is used as a material. In some cases, fine holes are formed at the stage of molding the resin core material 14. In addition, a mixture of PP resin fibers and wood fibers in an appropriate ratio is mixed, formed into a mat shape through heating and pressurizing steps, and then subjected to press processing to provide a breathable wood with a desired thickness. A fiberboard can also be used.

  On the other hand, as the skin material 13, for example, a laminated sheet material in which a foam layer such as polypropylene foam or polyethylene foam is lined on the back surface of a top layer such as a TPO (thermoplastic olefin) sheet is used, and further on the back surface of the foam layer. A hot melt sheet such as polyethylene is coated. Further, an adhesive such as an acrylic resin may be coated.

  FIG. 5 shows a state in which the support housing 15 finishes rising toward the skin material 13 held by the skin gripping frame 12 and the skin material 13 is adhered to the resin core material 14 attached to the molding die 17. It is a schematic diagram which shows. Further, as described above, the internal space 19 of the molding die 17 is decompressed by the vacuum pump 18, and the skin material 13 is adsorbed through the suction holes of the molding die 17 and the fine holes provided on the entire surface of the resin core material 14. On the other hand, also on the outer peripheral portion of the mold 17, the skin material 13 is adhered to the upper end portion of the support housing 15 with a peelable tape 21 (or an applied or laminated adhesive) provided on the release coating surface.

  When the skin material 13 is adhered to the resin core material 14 and then shifts to the mold release state, prior to this, the open / close valve 28 is opened in response to a control signal from a control unit (not shown), and the air compressor 29 Air is supplied to the supply unit 26. This air is ejected from the air ejection hole 24 through the air ejection nozzle 25 at a predetermined pressure suitable for separating the outer peripheral portion of the skin material 13 from the upper surface of the mold 17, and the air peels off the skin material 13 from the air. The adhesive layer of the adhesive tape 21 is cooled and receives a peeling force. Thereby, the adhesive force of the adhesive layer on the back surface of the skin material 13 is lost. Next, when the support housing 15 is lowered by the drive cylinder 20, as shown in FIG. 6, the skin material 13 is peeled off from the upper surface of the support housing 15 together with the resin core material 14, and is smoothly removed from the mold 17. be able to.

  Therefore, in the vacuum forming apparatus according to the present embodiment, the air blowing holes 24 are provided in the forming die 17 so as to correspond to the periphery of the forming die 17, that is, the outer periphery of the forming skin material 13. Since it can assist, durability and peeling performance can fully be exhibited. Moreover, the peeling cylinder etc. which were required with the conventional apparatus can be abbreviate | omitted, and it becomes possible to attach another effective component instead of this peeling cylinder. Further, by blowing air toward the skin material 13, a cooling effect on the hot melt or the like on the back surface of the skin material can be obtained, the hot melt becomes solidified, and the detachment work is improved.

  In the above embodiment, the structure in which one mold 17 is provided in the support housing 15 is disclosed. However, the number and shape differ depending on the product. For example, in FIG. A structure in which a plurality of air ejection holes 24 are provided in one support housing 15 is shown.

  As mentioned above, although the preferable embodiment of this invention was explained in full detail, the manufacturing apparatus of the interior component for vehicles which concerns on this invention is not limited to the embodiment mentioned above, It is the present invention described in the claim. Various modifications and changes are possible within the scope of the gist.

11 Vacuum forming device 12 Skin gripping frame 13 Skin material 14 Resin core material 15 Support housing 16 Heater device 17 Mold 18 Vacuum pump 19 Internal space 20 Drive cylinder 21 Peeling tape 22 Release cylinder 23 Air piping 24 Air ejection hole 25 Air ejection nozzle 26 Air supply unit 27 Air hose 28 Open / close valve 29 Air compressor (air supply system)

Claims (1)

A manufacturing apparatus for attaching a skin material in which an adhesive layer is formed to a resin core material of an interior part for a vehicle,
A mold on which the resin core material provided on the support housing is mounted;
Provided so that air is ejected from the upper surface of the support housing, which is disposed in contact with the outer peripheral portion of the skin material adhered to the resin core material, along the outer peripheral portion of the mold . in order to weaken the adhesive strength of the back surface of the adhesive layer, and the air supply unit to promote release by supplying air to the peripheral portion rear face of the skin material is adhered to said resin core member,
An air supply system connected to the air supply unit;
An apparatus for manufacturing interior parts for vehicles.

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