JPH03197032A - Preparation of automotive door trim - Google Patents

Abstract

PURPOSE:To prevent surely bad conditions such as wrinkles on an intermediate adhesive member and peeling from occurrence and a bad appearance from occurring by setting a door trim main body on a mold face of a top force for contact bonding after an intermediate contacting part of the door trim main body is coated with an adhesive and constituting a bottom force for contact bonding from an air bag set on the side wall whereon an opening which is a little larger than the outer shape of the intermediate contacting part is formed on the upper face. CONSTITUTION:When a setting process for a door trim main body 11 and an intermediate contacting member 12 is completed, a top force 20 for contact bonding is lowered by an action of an elevating apparatus and the surface part of the door trim main body comes close to the neighborhood of a clamp apparatus 29 positioned on the upper end of a side wall 23 and the lowering action is stopped. Then, an on-off valve 25 becomes open and air is fed in an air bag 24 from a compressed air apparatus 26 and each part of the intermediate contacting member 12 is pressed under a uniform pressure to the door trim main body 11 by air pressure through an air bag 24.

Description

Detailed Description of the Invention (Industrial Application Field) This invention relates to a method of manufacturing an automobile door trim equipped with an intermediate member. In particular, when the intermediate member is crimped to the trim body, The present invention relates to a method of manufacturing a door trim for an automobile, which prevents excessive tension from being locally applied to the door trim, thereby preventing wrinkles or peeling of the intermediate member.

(Prior Art) Recently, in order to improve the comfort inside the car interior, the materials of interior parts such as car door trims have been upgraded, or decorative members such as cloth and carpets have been attached to appropriate locations on the surface of the door trims. is being attempted.

FIG. 7 shows an outline of the structure of an automobile door trim. In the drawing, an automobile door trim 1 is a door trim body formed by integrally bonding a skin material 3 to the surface of a core material 2 formed into a desired shape. 4, and an intermediate member 5, such as a cloth, which is attached to the door trim body 4 in order to further add decoration to an appropriate location on the surface thereof.

A conventional mounting method for the intermediate member 5 will be explained based on FIG. 8.

First, the door trim body 4 is set on the mold surface of the upper mold 6 for crimping. At this time, the location where the intermediate member 5 is attached to the door trim body 4 is coated with an adhesive in advance.

On the other hand, the intermediate contact member 5 is set in the lower crimping die 7 with its surface facing downward, and its peripheral edge is held by a clamp device 8. The mold surface of this lower mold 7 for crimping matches the final surface shape of the intermediate contact member 5 to be crimped onto the door trim body 4.

After the door trim main body 4 and intermediate member 5 are set in the upper and lower crimping molds 6.7, the upper and lower crimping molds 6 are lowered and the upper and lower molds 6.7 are clamped. Then, the intermediate contact member 5 is bonded. Furthermore, a wood grain bar 9 is provided along the outer periphery of the lower mold 7 for crimping.
rises and the circumferential groove 4 formed in the door trim body 4
The peripheral edge end portion 5a of the intermediate member 5 is press-fitted into the inner portion a, and the end portion is treated to improve the appearance of the peripheral edge portion of the intermediate member 5.

(Problem to be Solved by the Invention) However, in the conventional mounting method of the middle contact member 5, when the middle contact member 5 is crimped to the door trim body 4, the part of the middle contact member 5 shown by A in the figure may be misplaced. Then, it becomes a tent state, and excessive tension is applied locally, increasing the rate of deployment. Therefore, after molding, return stress acts strongly,
There was a problem in that problems such as peeling and wrinkles of the intermediate contact member 5 occurred.

Furthermore, since the unfolded shape of the middle contact member 5 is influenced by the surface shape of the lower mold 7 for crimping, it has been pointed out that the degree of freedom in shaping the developed shape of the middle contact member 5 is restricted.

This invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a method for manufacturing a door trim to which an intermediate member is attached, in which the intermediate member is attached to the door trim body. A manufacturing method for automobile door trims that prevents excessive tension from being applied to the intermediate members, eliminates appearance defects such as peeling and wrinkles, and dramatically improves the degree of freedom in shaping the intermediate members. It is about providing.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a method for manufacturing an automobile door trim in which an intermediate member is attached to a required part of the surface of a door trim body, in which a core material is formed into a required shape. A door trim body is formed by integrally adhering a skin material to the surface of the core material, and a circumferential groove is formed along the periphery of the mounting portion of the intermediate member, and the door trim body is formed by forming a door trim body. After applying adhesive to the middle part, this door trim body was set on the mold surface of the upper mold for crimping, and an opening slightly larger than the outer shape of the middle part of the door trim body was formed on the top surface. A lower mold for crimping is constructed from the side wall and the airbag installed in the side wall, and the intermediate member is set in the opening with the surface side facing downward, and the peripheral edge of the intermediate member is set in the opening. A step of clamping with a clamping device along the upper end of the side wall, and after lowering the upper mold for crimping to near the upper end of the side wall, filling the air bag with air, and applying pressure from the air bag to the door trim body. , a step of crimping the intermediate member to the inner circumference of the side wall, and a step of raising the wood grain bar provided along the inner periphery of the side wall and press-fitting the end of the intermediate member into the circumferential groove formed in the door trim body. It is characterized by consisting of.

(Function) As is clear from the above configuration, according to the method for manufacturing an automobile door trim according to the present invention, the intermediate member is crimped to the door trim body by filling air into the airbag, and air pressure is used to press the intermediate member to the door trim body. Since the intermediate member is crimped to the door trim body, excessive tension is not applied locally, and a uniform pressing force is applied to the entire area of the intermediate member.

Furthermore, the developed shape of the middle contact member is not affected by the mold surface shape of the lower mold as in conventional methods, and the middle contact member is crimped onto the door trim body using air pressure, so it can be applied to any three-dimensional shape. , the degree of freedom in shaping the intermediate member is dramatically improved.

(Example) Hereinafter, a method for manufacturing an automobile door trim according to the present invention will be described in detail with reference to the accompanying drawings.

FIGS. 1 and 2 are perspective views and longitudinal cross-sectional views showing an automobile door trim manufactured according to the present invention, and FIGS. 3 to 6 are cross-sectional views showing steps of the method of the present invention.

In FIGS. 1 and 2, the automobile door trim 10 is
The door trim body 11 is generally composed of a door trim body 11 and an intermediate member 12 such as a cloth attached to a required portion of the surface of the door trim body 11.

More specifically, the door trim body 11 is made by extruding a thermoplastic resin such as polypropylene resin mixed with a filler such as wood powder filler into a sheet using an extrusion molding machine, and then heating and softening this sheet to form the desired shape. It is composed of a core material 13 molded in a cold press mold, and a skin material 14 such as a PVC sheet that is integrally attached during molding of the core material 13.

On the other hand, the intermediate member 12 is made of velvet or jersey.

A polyurethane foam 16 is laminated on the back side of a cloth 15 such as tricot or moquette.

A circumferential groove 17 is recessed in the door trim main body 11 along the circumferential shape of the intermediate member 12, and this circumferential groove 17 is formed at the same time as the core material 13 is press-molded. The peripheral end 12a of the member 12 is connected to this peripheral groove 1.
By being press-fitted into 7 and undergoing terminal treatment, it has an excellent appearance and design.

In addition, as the core material 13, wood fiberboard or the like may be hot-press molded into the desired shape. When the core material 13 is hot-press molded, the skin material 14 is integrated with the core material by vacuum molding or the like in a later process. be converted into

Next, the manufacturing process of the above automobile door trim 10 will be explained in detail, but in the present invention, the door trim body 1
1, since the main part is the process of attaching the intermediate member 12, a description of the process of forming the door trim body 11 will be omitted.

First, as shown in FIG. 3, the door trim body 11 is set on the mold surface of the upper mold 20 for crimping.

At this time, the attachment portion of the intermediate member 12 on the door trim body 11 is coated with an adhesive in advance.

On the other hand, the intermediate contact member 12 is set in the lower crimping mold 21 with the front surface side, that is, the cross 15 facing downward. It consists of a side wall 23 provided on all sides so as to form an opening 22 slightly larger than the outer shape on its upper surface, and an air bag 24 installed inside this side wall 23. This air bag 24 has an on-off valve 25. It is connected to the compressed air device 26 via the air compressor.

Further, the airbag 24 is set on a vertically movable support base 27, and along the upper surface periphery of this support base 27, a wood grain bar 28 for wood graining the end of the intermediate member 12 is installed on the inner periphery of the side wall 23. It is located along the perimeter.

The intermediate member 12 is clamped at its peripheral edge 12 a along the upper end of the side wall 23 by a clamp device 29 so as to cover the opening 22 of the side wall 23 .

Next, when the step of setting the door trim main body 11 and the intermediate member 12 is completed in this way, the upper mold 20 for crimping is
It is lowered by the operation of a lifting device (not shown), and as shown in FIG. 4, the surface portion of the door trim body 10 approaches a portion near the clamp device 29 located at the upper end of the side wall 23, and the lowering operation stops.

Thereafter, the on-off valve 25 is opened, and the air bag 24 is filled with air from the compressed air device 26, as shown in FIG.
The intermediate member 12 is pressed against the door trim body 11 by the pressure of the air via the air bag 24 with uniform pressure at each part.

The outer periphery of the airbag 24 is laminated with a nylon net 30 to reduce friction.

In this way, the air bag 24 is used to apply a uniform pressing force to the door trim body 11 to press the intermediate member 12 against the door trim body 11, so that the intermediate member 12 is pressed against the door trim body 11 locally. Excessive tension is not applied to the material, and the problem of wrinkles and peeling due to excessive action of the return horn after molding is effectively solved.

Furthermore, no matter how complex the surface shape on which the intermediate contact member 12 is attached is, the airbag 24 can easily adapt to the surface shape of the intermediate aircraft portion, so the degree of freedom in shaping is restricted. The degree of freedom in design is dramatically improved.

Finally, as shown in FIG. 6, the support base 27 is raised and the end portion 12a of the intermediate member 12 is press-fitted into the circumferential groove 17 formed in the door trim body 11 by the woodgrain bar 28.

(Effects of the Invention) As explained above, the method of the present invention has the following special effects.

■According to the method of the present invention, in the process of crimping the intermediate member to the door trim body, the intermediate member is crimped to the door trim body by filling air into the air bag and applying uniform air pressure through the air bag. Because it is meant to be fixed,
Compared to the conventional method of crimping the trim body and the intermediate member using upper and lower crimping mold clamps, there is no chance of the intermediate member being misplaced, and excessive tension is not applied locally. This effectively solves problems such as wrinkles and peeling of parts, reliably prevents appearance defects, and ensures long-term quality performance in product appearance.

■According to the method of the present invention, the intermediate member is crimped and fixed to the door trim body side using the air pressure filled in the airbag, and since the airbag can be shaped into any three-dimensional shape, it can be used in the door trim. No matter how you set the shape of the intermediate part, the pressing force necessary to crimp the intermediate member to the door trim body can be guaranteed, so by increasing the degree of freedom in the design of the intermediate member, you can improve the product quality. This has the effect of dramatically improving the degree of freedom in modeling.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an automobile door trim manufactured by the method of the present invention, Fig. 2 is a sectional view taken along the line ■-■ in Fig. 1, and Figs. 3 to 6 show the steps of the method of the present invention. FIG. 7 is a sectional view showing a conventional automobile door trim, and FIG. 8 is a sectional view showing a conventional method for attaching an intermediate member to a door trim body. It is a diagram. 10...Automotive door trim 11...Door trim body 12...Middle member 17...Peripheral groove 20...Upper die for crimping 21...Lower die for crimping 23...Side wall 24...・Air bag 26...Pneumatic device 27...Support stand 28...Kimekomi bar 29...Clamp device

Claims (1)

[Claims] 1. A method for manufacturing an automobile door trim (10) in which an intermediate member (12) is attached to a required surface portion of a door trim body (11), including forming a core material (13) into a required shape. Then, the skin material (14) is integrally attached to the surface of this core material (13) to form the door trim body (
11) and forming a circumferential groove (17) along the periphery of the mounting portion of the intermediate member (12); and an intermediate portion of the door trim body (11). After applying adhesive, set this door trim body (11) on the mold surface of the upper mold for crimping (20), and then
A lower mold for crimping ( 21
), and an intermediate member (
12) with the surface side facing downward, and clamping the peripheral edge of the intermediate member (12) along the upper end of the side wall (23) with a clamping device (29); and the upper mold for crimping. (20) is lowered to near the upper end of the side wall (23), the air bag (24) is filled with air, and the pressing force from the air bag (24) is applied to the door trim body (11). , a step of crimping the intermediate member (12), and raising the wood grain bar (28) provided along the inner periphery of the side wall (23) to raise the circumferential groove (17) formed in the door trim body (11). ) of the intermediate member (12).
A method for manufacturing an automobile door trim, comprising the steps of: (a) press-fitting.