JP5626893B2 - Direct molding method of cushion body for assembly - Google Patents

Description

The present invention mainly reduces the impact and noise when a main body (box main body) constituting an assembly such as a console box and a grab box for a vehicle and a movable body (lid body) against the main body come into contact with each other. The present invention relates to a method for directly forming a cushion body.

  For example, in the grab box disclosed in Patent Document 1, a cushion body (rubber part) is preliminarily molded on the lid body side that opens and closes with respect to the main body configured in the instrument panel. This rubber part comes into contact with the main body when the lid is closed to alleviate impact and noise.

Japanese Utility Model Publication No. 6-78559

  In addition to the grab box disclosed in Patent Document 1, it is common to provide a plurality of cushion bodies at locations where the movable body contacts the main body. In order to assemble the cushion body to the main body or the movable body, the anchor portion integral with the cushion body is forcibly inserted into the mounting hole opened through the main body or the movable body. It ’s bad. It is also necessary to manage a large number of cushion bodies.

  This invention solves such a subject, The objective is to make the operation | work which attaches a cushion body to a main body or a movable body, and the components management of a cushion body unnecessary.

The present invention is for achieving the above object, and is configured as follows.
A method of directly forming a cushion body provided at a mutual contact portion for buffering an impact at the time of contact between a main body constituting an assembly and a movable body movable relative to the main body, the main body or the movable body one was a base material to form a cavity by placing a mold on the location of Oite predrilled in which the through-holes at positions corresponding to the contact portion of the substrate by the through holes of the forming die and the substrate . Against this cavity by injecting the elastic material in a molten state using a locatable injection unit anywhere in the substrate, forming directly a cushion body located on the contact portion in the state of being coupled with the substrate .

Preferably, by injecting a molten elastic material into the cavity constituted by the mold and the through hole of the base material from the non-design surface side of the main body or movable body as the base material using an injection unit. is there.

More preferably, Oite at positions corresponding to each other of the contact portion and the gap of the main body or a movable body that becomes the base material, molding by placing the mold in the position of the through hole penetrating across and the clearance of these contact portions A cavity is formed by the mold and the through-hole, and a molten elastic material is injected into the cavity using an injection unit, so that the cushion body located at the contact portion and the coating located at the gap are combined with the base material. It is to mold directly into the state.

In the present invention, by directly forming the cushioning body for impact buffering using either the main body or the movable body in the assembly as a base material, the work of assembling the cushioning body in the assembly and the component management of the cushioning body become unnecessary. .
In addition, by injecting the molten elastic material from the opposite side of the design surface of the main body or movable body as the base material, all of the gate traces of the injection, burrs or seizure of the elastic material, etc. occur on the non-design surface side, Good appearance of the design surface can be maintained.
Furthermore, by directly molding the cushion body and the film using one of the main body or the movable body in the assembly as a base material, the work of assembling the cushion body and the film individually to the assembly and the management of parts become unnecessary.

The external appearance perspective view showing the console box for vehicles. The external appearance perspective view showing the lid of a console box. The top view showing the inner side of the lid of a console box. Sectional drawing of the AA arrow direction of FIG. Each external perspective view showing two types of cushion bodies. The block diagram showing the molding equipment of the cushion body. Sectional drawing showing the periphery of one molding cavity. FIG. 8 is a side sectional view of FIG. 7. Sectional drawing showing the periphery of another shaping | molding cavity. FIG. 6 is an external perspective view showing a part of a lid in the second embodiment. The external appearance perspective view of the state by which the cushion body was provided in the cover body of FIG. The expanded sectional view of the BB arrow direction of FIG. Sectional drawing showing the cavity for shaping | molding of the cushion body in Embodiment 2. FIG. Sectional drawing showing the example of a change of the metal mold | die in the cavity for shaping | molding of FIG. Sectional drawing showing two examples of the installation change of the cushion body in Embodiment 2. FIG.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
In FIGS. 1 to 9 showing the first embodiment of the present invention, a console box 10 is targeted as an example of an assembly for a vehicle interior. As shown in FIG. 1, the main body 12 of the console box 10 includes a storage portion 14 whose upper surface is opened. The upper surface opening portion of the storage portion 14 is opened and closed by a lid 16. Accordingly, the lid 16 corresponds to a movable body with respect to the main body 12 of the assembly. FIG. 1 shows a state where the lid 16 is opened, and the inside of the storage unit 14 can be accessed in this state.

  The lid 16 has a rectangular shape in plan view, and has a hinge 18 that is coupled to the main body 12 so that the long side can be opened and closed (FIGS. 2 and 3). Further, the edge 20 on the other side of the long side of the lid body 16 is a portion that is received by contacting a corresponding portion of the main body 12 when the upper surface opening portion of the main body 12 is closed by the lid body 16. That is, the edge portion 20 of the lid body 16 and the corresponding portion of the main body 12 that receives it correspond to the “contact portion between the main body and the movable body” of the present invention.

Cushion bodies 30 are provided on the edge portion 20 of the lid body 16 at a total of three locations, the center and the left and right sides, respectively (FIGS. 2 to 4). These cushion bodies 30 are each formed of a material such as rubber or elastomer having moderate elasticity. And when the upper surface opening part of the main body 12 is closed with the cover body 16, the impact and noise in a mutual contact part are relieve | moderated by each cushion body 30. FIG.
The cushion body 30A at the center of the edge 20 shown in FIG. 5A and the cushion bodies 30B on the left and right sides shown in FIG. However, when these cushion bodies 30A and 30B and the cushion body 30C in the second embodiment to be described later are described, these are collectively referred to as the cushion body 30 unless it is particularly necessary to distinguish them.

Next, a facility for so-called direct molding, in which the cushion body 30 is directly molded using the lid body 16 as a base material, will be described. In this direct molding facility, an injection unit 40 shown in FIG. 6 is used. The injection unit 40 is, for example, a handy type, and can be molded by moving the injection unit 40 to an arbitrary portion of the base material.
The injection unit 40 heats and melts the pellet-shaped elastic material fed into the body 42 from the hopper 46 near the tip of the body 42, and operates the injection cylinder 43 to melt the elastic material in the molten state. It can be ejected from the nozzle 44 at the tip of the body 42.

  Direct molding is a molding means that forms a cavity by aligning a mold with a part of a resin product (primary molded product) as a base material, and directly molds another resin molded product (secondary molded product) there. is there. According to this direct molding, without changing the mold of the primary molded product, the molded product of the final shape can be obtained by molding the secondary molded product to a free part of the primary molded product. it can.

  In the present embodiment, as described above, the cushion body 30 is directly molded using the lid body 16 which is a primary molded product as a base material. In the edge portion 20 of the lid body 16, through holes 22 penetrating the front and back of the lid body 16 are opened at locations where the cushion bodies 30 shown in FIG. 3 or 4 are formed (FIGS. 7 to 5). 9). At the positions of these through holes 22, the upper mold 50 is disposed on the upper surface side of the edge portion 20, and the lower mold 52 is disposed on the lower surface side. The upper mold 50 and the lower mold 52 and the through hole 22 constitute a cavity 54 having the shape shown in FIGS. 7 and 8 is for molding the cushion body 30A, and the cavity 54 shown in FIG. 9 is for molding the cushion body 30B.

The upper mold 50 is coupled to the tip of the body 42 in the injection unit 40, and a molten elastic material is injected from the upper mold 50 side toward the cavity 54. Moreover, the lower surface side of the edge 20 shown in FIGS. 7 to 9 is a design surface of the lid body 16, and the upper surface side is a non-design surface of the lid body 16. Therefore, the upper mold 50 is disposed on the non-design surface side of the lid 16, and the molten elastic material is injected into the cavity 54 from the non-design surface side. A part of the cavity 54 formed by the upper mold 50 corresponds to the anchor portion 32 (FIGS. 5 and 6) of the cushion body 30.
In the cavity 54 of the cushion body 30 </ b> A, as shown in FIG. 7, the protrusion 24 protruding from the lower surface side of the edge portion 20 also constitutes a part of the cavity 54. As shown in FIG. 5, these protrusions 24 prevent the cushion body 30A having a rectangular shape from rotating and hold it in a predetermined state.

In the direct molding of the cushion body 30, as already described, the upper mold 50 and the lower mold 52 are formed at the positions of the through-holes 22 opened in the edge portion 20 using the lid 16 that is a primary molded product as a base material. Are arranged to form the cavities 54 (FIGS. 7 to 9). Thereafter, the injection unit 40 injects the molten elastic material into the individual cavities 54 to form the three cushion bodies 30 on the edge portion 20 of the lid body 16 so as to be integrated with the edge portion 20. (FIGS. 2 to 4).
In addition, when the cover body 16 which is a base material is made of polypropylene, if an olefin-based elastomer is used as an elastic material of the cushion body 30, mutual adhesiveness is good, and the integration between the lid body 16 and the cushion body 30 is achieved. Enhanced.

  Thus, by directly forming the cushion body 30 on the edge 20 of the lid body 16, the work of assembling a previously molded cushion component to the lid body 16 and the management of the components become unnecessary. Further, by injecting into the cavity 54 from the non-design surface side of the lid body 16, the gate trace of the injection, burrs, or seizure of the elastic material occurs on the non-design surface side, and the design surface of the lid body 16 is attractive. Kept in good condition.

  The vehicle interior assembly in FIGS. 10 to 15 showing the second embodiment of the present invention is also intended for a vehicle console box, a grab box, and the like. The lid 16 shown in FIGS. 10 and 11 is connected to the main body 12 shown in FIG. 12 so as to be openable and closable, and the main body 12 and the lid 16 correspond to the “main body and movable body” of the present invention. The lid body 16 has a frame portion 26 in which the cushion body 30C is accommodated on the inner side surface (FIGS. 10 and 11). Further, the side surface of the lid body 16 is provided with a coating 34 that is positioned in the gap with the main body 12 and absorbs the dimensional tolerance (FIGS. 11 and 12). The cushion body 30C and the coating 34 are integrally connected by a through hole 28 formed in the side wall of the lid body 16 (FIG. 12).

  The cushion body 30 and the coating 34 are directly molded using the lid body 16 as a base material as in the first embodiment. Specifically, as shown in FIG. 13, the upper mold 50 is disposed so as to cover the frame portion 26 of the lid body 16, and thereby the cushion body 30 </ b> C and the coating 34 are interposed between the lid body 16 and the upper mold 50. A cavity 54 is formed for molding. The upper die 50 is coupled to the tip of the body 42 in the injection unit 40 similar to that of the first embodiment, and a molten elastic material can be injected from the injection unit 40 into the cavity 54. Thus, the cushion body 30C and the coating 34 as shown in FIGS. 11 and 12 are formed on the lid body 16 in an integrated state with the lid body 16.

In forming the film 34, a slide die 56 can be used as shown in FIG. 14, and the shape and size of the film 34 can be arbitrarily set. Further, the through-hole 28 can be omitted by integrating the cushion body 30C and the coating 34 over the edge of the lid body 16.
Furthermore, as shown in FIG. 15, the cushion body 30 </ b> C and the coating 34 can be directly molded on the main body 12 side. In the molding facility of the second embodiment, the lower mold 52 may be used as in the first embodiment as necessary.

  As described above, in the second embodiment, by directly forming the cushion body 30A and the film 34 on the lid 16 which is a primary molded product, the man-hours are compared with the conventional work in which these are individually assembled. And inventory of individual parts becomes unnecessary. The film 34 is not peeled off when the lid 16 is opened and closed, and the shape can be selected in consideration of design, unlike the case where felt or the like is pasted.

10 Console box (assembly)
12 Body 16 Lid 30 Cushion 50 Upper mold 52 Lower mold 54 Cavity

Claims (3)

A cushion body direct molding method provided at a mutual contact portion for buffering an impact at the time of contact between a main body constituting an assembly and a movable body movable relative to the main body,
And one of the main or the movable body and the base material, by a through-hole of placing the mold in the position of the through-holes are opened in advance Oite the portion corresponding to the contact portion of the substrate forming die and the substrate and a cavity, against this cavity by injecting the elastic material in a molten state using a locatable injection unit anywhere in the substrate, a cushion body located on the contact portion is coupled with the substrate A direct molding method for a cushion body for an assembly which is directly molded into a state. A method of directly forming a cushion body for an assembly according to claim 1,
A cushion body for an assembly in which a molten elastic material is injected from a non-design surface side of a main body or a movable body serving as a base into a cavity constituted by a mold and a through hole of the base using an injection unit Direct molding method. A method of directly forming a cushion body for an assembly according to claim 1,
Oite mutual contact of the body or the movable body as the base material and the portion corresponding to the gap, these contact portion and the forming die and the through holes are arranged molds in the position of the through hole penetrating across the gap and configure the cavity by, by injecting an elastic material in a molten state using an injection unit into the cavity, directly molded to the state of the cushion body and coating located in the gap is coupled with the substrate located in the contact portion Direct molding method for cushion body for assembly.

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