JPH05162169A - Production of interior automotive trim part - Google Patents

Abstract

PURPOSE:To provide a method for production of an interior automotive trim part wherein the manufacturing process can be remarkably shortened by setting freely a shape of an intermediate member, manufacturing simply the intermediate member and fixing simply and surely the intermediate member to a trim main body. CONSTITUTION:An intermediate member 30 can be set simply and the shape can be set freely by using an insert injection technique and fixing stability of the intermediate member 30 is improved by laying and fixing a fitment 33 for insert and an insert piece provided on a core material of an intermediate part into a resin core material of a trim main body and it is possible to integrate the intermediate member 30 with a trim main body when the trim main body is molded by means of mold press.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing interior parts for automobiles such as door trims for automobiles.

[0002]

2. Description of the Related Art Recently, in order to improve the comfortability of the interior of an automobile, it is often used to upgrade the material of interior parts such as automobile door trim or to attach decorative members such as cloth and carpet to the door trim surface. Has been done.

FIG. 10 and FIG. 11 show a perspective view and a sectional view of an automobile door trim, respectively. A conventional automobile door trim 1 has a core material 2 formed in a required shape and a surface of the core material 2. The door trim body 4 is composed of a skin material 3 integrally attached to the door trim body 4, and an inner contact member 5 attached to the surface of the door trim body 4 in order to further add a decorative property to the door trim body 4. ..

As shown in FIG. 11, the central contact member 5 has a central contact pad material 5b such as polyurethane foam having cushioning property on the surface side of the central contact core material 5a having a support function. Laminated and laminated their outer surfaces with synthetic leather,
Covered with a cloth 5c for the middle contact part, such as a cloth 5 for the middle contact part
The peripheral edge end of c is wound around and fixed to the rear surface side of the peripheral edge of the core material 5a in the contact portion.

Further, the center contact member 5 thus constructed
In order to attach the door trim body 4 to the door trim body 4, a claw 6 made of a steel plate is provided on the core material 5a of the center contact portion of the center contact member 5, and the mounting hole 4a corresponding to the claw 6 is provided in the door trim body 4.
Has been established. Then, after inserting the claw 6 into the mounting hole 4a, the tip end portion of the claw 6 is bent to attach the center contact member 5 to the door trim body 4.

[0006]

As described above, in the conventional automobile door trim 1, it is troublesome to manufacture the intermediate contact member 5 made of a laminated body, and the intermediate contact member 5 is set in the inverse shape. In this case, since it is not possible to attach the skin material 5c for the middle contact portion, it is unavoidable to set it to a substantially flat surface, and it is pointed out that the degree of freedom in shaping the door trim 1 is greatly restricted.

Further, when the center contact member 5 is mounted on the door trim body 4, the claw 6 provided on the center core material 5a is inserted into the mounting hole 4a of the door trim body 4 and then fixed by bending. The door trim body 4 needs to be perforated so that the mounting holes 4a are accurately formed at the positions where the claws 6 of the contact member 5 are set, which results in an increase in the cost of the product due to an increase in the number of steps. In addition, the work of inserting the claws 6 into the mounting holes 4a of the door trim body 4 is a blind work, the workability is extremely poor, and the respective claws 6 must be bent, which is also troublesome. Will be things.

In addition, it is difficult for the fixing work with the claws 6 to accurately integrate the center contact member 5 with the door trim main body 4 due to variations in the work, and the peripheral portion of the center contact member 5 and the door trim main body 4. 4 is likely to cause a gap between the inner trim member 4 and the door trim body 4, and in extreme cases, the middle contact member 5 is displaced with respect to the door trim body 4 due to vibrations during traveling. At the same time, it was pointed out that the mounting stability could not be secured.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method for manufacturing an automobile interior part in which an intermediate contact member is attached to an appropriate place on the surface of a trim body. The center contact member can be easily manufactured, and the shape of the product can be freely set by improving the flexibility of molding the center contact member, and the center contact member can be easily and surely attached to the trim body. Another object of the present invention is to provide a method for manufacturing an automobile interior part, which is capable of significantly shortening the manufacturing process.

[0010]

In order to achieve the above object, the present invention is constructed by covering the surface side of the core material of the middle contact portion with a skin material of the middle contact portion, and is mounted on an appropriate place on the surface of the trim body. In the method for molding the intermediate contact member, after setting the intermediate contact surface material in the injection molding die, resin is filled in the cavity of the injection molding die to form the inverse shape intermediate contact core material. The molding is characterized in that the skin material of the middle contact portion is integrally attached to the concave surface of the core material of the middle contact portion.

Further, in the method for manufacturing an automobile interior part according to the present invention, after setting the skin material of the middle contact portion in the injection molding die, resin is filled in the cavity of the die to obtain the inverse shape. Along with molding the contact portion core material, the step of forming the contact portion core material in which the contact portion skin material is integrally attached to the concave surface of the contact portion core material, and when the upper and lower molds for mold press molding are opened, Set the middle contact member on the upper mold for mold press molding with the insert metal fittings or insert pieces facing downward, and position and hold the skin material of the trim body in the upper and lower mold press molds. By setting and supplying the material that distributes the resin material, which is the material of the resin core material, onto the mold surface of the mold, and by engaging the upper and lower molds for mold press molding with a predetermined clearance, the resin core material and The material is integrally molded into the required shape, and the metal fittings for insert provided in the center contact member pierce the skin material, or the insert piece penetrates into the resin core material through the opening and solidifies the resin core material And a mold press forming step in which the member is integrated with the trim body.

[0012]

As is apparent from the above construction, in the method for molding an intermediate contact member according to the present invention, the skin material of the intermediate contact portion is set in the injection molding die, and Molding by filling the resin in the mold cavity, by using the so-called insert injection method, it is possible to set the shape of the core material of the contact portion to any shape such as the inverse shape, and the core material of the contact portion and Since the intermediate contact surface material is integrally molded, the conventional attaching step can be eliminated and the forming step of the intermediate contact member can be greatly shortened.

Furthermore, the method for manufacturing an automobile interior part according to the present invention has a structure in which the insert fitting and the insert piece provided in the center contact member are inserted into the resin core material of the trim main body. As compared with the structure for mounting the center contact member by bending and fixing the claws as described above, the center contact member does not become loose or float, and the center contact member can be securely mounted.

In addition, since the center contact member can be integrated with the trim body during the mold press molding of the resin core material and the skin material, it is possible to eliminate the punching process of the trim body, The troublesome installation work of installing the contact members can be eliminated.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method for manufacturing automobile interior parts according to the present invention will be described in detail below with reference to the accompanying 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 showing the constitution of the automobile door trim, and FIGS. 3 and 4 are constituent members of the automobile door trim. Each cross-sectional view showing the manufacturing process of the contact member, FIG. 5 is a cross-sectional view showing the configuration of a mold press molding apparatus for carrying out the method of the present invention, FIGS. 6 and 7 are cross-sectional views showing each step of the method of the present invention, 8 and 9 are sectional views showing other embodiments of the method of the present invention.

First, in FIGS. 1 and 2, an automobile door trim 10 is roughly composed of a door trim main body 20 and an intermediate member 30 mounted on a required surface portion of the door trim main body 20.

More specifically, the door trim body 20 described above.
Is a resin core material 21 molded and press-molded into a required shape.
And a skin material 22 integrally attached to the front surface side of the resin core material 21. In this embodiment, as the resin core material 21, polypropylene resin is made of talc in consideration of moldability, cost, mechanical strength and the like. A composite resin material mixed with a filler such as is used, and the skin material 22 is a laminated sheet in which a foam layer such as polypropylene foam or polyethylene foam is laminated on the back surface of a resin sheet such as an ABS mixed PVC sheet. ..

Next, the center contact member 30 is formed by injection molding a synthetic resin such as polypropylene resin or ABS resin, and the center contact part core material 31 is formed into an inverse shape, and the center contact part core material 31. The inner contact member 30 is made up of an intermediate contact surface skin material 32 such as a cloth attached to the surface, and the intermediate contact member 30 is securely fixed to the door trim body 20 via an insert fitting 33.

The inner contact member 30 has an inner contact portion core member 31 formed in an inverse shape as shown in the drawing because of the use of the insert injection method as will be described later. The skin material 32 in the middle contact portion is not tensioned with respect to the concave surface of the material 31, and is adhered while maintaining a good close contact.

Therefore, since the center contact member 30 is not restricted to a flat surface as in the conventional case and is molded into a complicated curved surface shape, the appearance performance is improved and it is possible to cope with the complicated curved surface shape. Since the middle contact surface skin material 32 is adhered in close contact, it does not float and has a good feel to the touch.

Next, the molding process of the inner contact member 30 will be described with reference to FIGS.

First of all, as shown in FIG. 3, the skin material 32 of the middle contact portion is attached to the movable side mold 40 constituting one side of the injection molding mold.
And the insert fitting 33 is set in the other fixed-side mold 41.

Next, the movable side mold 40 is moved to fill the cavity 42 formed between the movable side mold 40 and the fixed side mold 41 with the resin through the sprue 43 as shown in FIG. While molding the inversely shaped core material 31 of the contact portion, and integrally adhering the skin material 32 of the contact portion to the concave surface which is the surface side of the core material 31 of the contact portion, inside the core material 31 of the contact portion The fitting 33 for insert is embedded and fixed to.

The core material 31 and the skin material 32 of the contact portion
When the cloth is used as the skin material 32 of the inscribed portion, each fiber of the cloth bites into the core material 31 of the inscribed portion,
Good bonding can be obtained by the so-called anchor effect.

By using the insert injection method as described above, the center contact member 30 can be easily manufactured, and the shape of the center contact member 30 can be easily adapted to a complicated curved surface shape such as an inverse shape. At that time, good adhesion between the central contact portion core material 31 and the central contact portion skin material 32 is also possible.

Similarly, the insert fitting 33 does not need to be separately attached, and can be attached at the same time in the molding process of the contact member 30.

Next, the structure of the mold press molding apparatus used in the molding process of the door trim main body 20 and the integration process of integrating the contact member 30 with the door trim main body 20 will be described with reference to FIG.

The molding apparatus includes a lower mold press molding die 50 having a desired mold surface, and an upper mold press molding die 60 located above the lower mold die 50 and having substantially the same mold surface. The upper die 60 can be moved up and down by an elevating device (not shown), and is configured to maintain a predetermined clearance with respect to the lower die 50 and to be engaged and tightened.

Further, the upper and lower molds 5 for mold press molding
A support frame 70 for setting the skin material 22 is provided at an intermediate portion between 0 and 60, and a holding means for holding the center contact member 30 is provided on the upper die 60 for mold press molding.

In this embodiment, the central contact member 30 is held by the upper mold 60 by a vacuum suction mechanism, and vacuum suction holes 61 are formed at a plurality of positions at the mounting positions of the upper mold 60. It is connected to the vacuum suction pump 63 through the vacuum suction pipe 62.

An extruding machine 51 is attached to the lower mold press molding die 50, and a resin material 80 in a molten state is put on the mold surface of the lower mold press molding die 50 from the extruding molding machine 51. A distribution supply gate 52 is provided.

Next, the molding process of the door trim main body 20 and the integration process of the contact member 30 will be described with reference to FIGS.

First, as shown in FIG. 6, when the upper and lower molds 50, 60 for molding press molding are in the mold open state, the peripheral edge portion of the skin material 22 of the door trim body 20 is held by the support frame 70, and the molding press is performed. The center contact member 30 is set at a predetermined position of the upper molding die 60. At this time, the skin material 22 is preheated to a predetermined temperature and is in a softened state.

For example, when a laminated sheet having a polyethylene foam lined on the back of a PVC sheet is used, the surface temperature of the skin material 22 is set to 100 to 120 ° C.
When the PVC sheet alone or the foamed PVC sheet alone is used, the surface temperature of the skin material 22 may be set to 80 to 100 ° C.

Further, the center contact member 30 is sucked and held by the vacuum pump 63 through the vacuum suction tube 62 and the vacuum suction hole 61 on the mold surface of the upper mold 60 for mold press molding. The metal fitting 33 for insert inserted in 31 faces downward.

A predetermined amount of the semi-molten resin material 80 is distributed and supplied to the mold surface of the mold press molding lower mold 50 through the extruder 51 and the gate 52.

After that, as shown in FIG. 7, the upper mold press molding die 60 is lowered to maintain a predetermined clearance, and the upper and lower mold press molding dies 50 and 60 are tightened by engaging pressure. The pressing pressure at this time was 80 kg / cm ² , and the pressing time was 40 seconds.

By this mold press molding, the resin material 80 is molded into a desired curved shape, the resin core material 21 is molded, and the skin material 22 is integrated on the surface side of the resin core material 21.

At this time, the insert metal fitting 33 embedded in the core material 31 of the middle portion pierces the skin material 22 and penetrates into the softened resin core material 21.
By the solidifying action of the resin core material 21, the insert fitting 33
Is firmly embedded and fixed inside the resin core material 21.

Therefore, when the door trim body 20 is molded and press-molded, the center contact member 30 is integrated at the same time, and the conventional drilling process for the door trim body and the separate mounting work of the center contact member can be eliminated. The manufacturing process of can be greatly shortened.

Next, FIGS. 8 and 9 show another embodiment of the present invention. In this embodiment, when the core material 31 of the contact portion and the skin material 32 of the contact portion are formed by the insert injection method. In place of the metal fitting 33 for insert, an insert piece 34 is provided integrally with the core material 31 of the contact portion, and the metal fitting 33 for insert is eliminated to reduce the number of members and the mounting man-hours. Since it is integrated with the central contact portion core material 31, a high melting point material such as ABS resin is used as the material of the central contact portion core material 31 so that the insert piece 34 is not softened by the heat of the resin core material 21. It must be used.

Further, unlike the insert fitting 33, which does not have a function of piercing the skin material 20, the skin material 22 is provided with an opening 23 slightly smaller than the outer shape of the center contact member 30 in advance.

Further, the insert piece 34 may be set in a shape having an anchor function such as an L shape so as not to fall off.

Then, as shown in FIG. 9, when the upper and lower molds 50 and 60 for mold press molding are engaged with each other, the resin core material 21 and the skin material 22 are mold press molded into a required curved surface shape and In the contact member 30, the insert piece 34 digs into the inside of the resin core material 21 through the opening 23 of the skin material 22, and the anchor effect causes the resin core material 21 and the center contact member 30 to be firmly bonded.

[0046]

As described above, according to the present invention, the following operational effects are achieved.

(1) Since the method of molding the intermediate contact member according to the present invention is to integrate the core material of the intermediate contact portion and the skin material of the intermediate contact portion by injection molding using the insert injection method. The shape of the intermediate contact member can be set to an arbitrary shape such as a curved surface, which has the effect of dramatically improving the degree of freedom in shaping the product, and also has the effect of significantly shortening the manufacturing process of the intermediate contact member.

(2) According to the method for manufacturing an automobile interior part according to the present invention, the metal fitting for insert and the insert piece provided on the core material of the intermediate portion are embedded and fixed in the resin core material of the trim body. Therefore, compared to the conventional mounting method in which the claws are bent and fixed, firmer mounting can be expected, and the middle contact member does not become loose and there is no gap between the peripheral edge of the middle contact member and the trim body. , While improving the appearance,
There is an effect that the central contact member can be firmly attached.

(3) According to the method of the present invention, since the center contact member is integrated during mold press molding of the trim body, it is possible to eliminate the boring process of the trim body, thereby shortening the manufacturing process. There is an effect that can be done.

(4) According to the method of the present invention, when the trim body is press-molded, the center contact member is integrated at the same time. Since the troublesome mounting work of mounting the member by bending the claws can be eliminated, the manufacturing process can be significantly shortened.

[Brief description of drawings]

FIG. 1 is a perspective view showing an automobile door trim manufactured by applying the method of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a cross-sectional view showing a molding step of a contact member used in the present invention, showing a material setting step.

FIG. 4 is a cross-sectional view showing a step of injection molding, showing a molding step of the intermediate contact member used in the present invention.

FIG. 5 is a cross-sectional view showing the configuration of a mold press molding apparatus for carrying out the method of the present invention.

FIG. 6 is a cross-sectional view showing one step of the method of the present invention, showing the step of setting and supplying the material to the mold press molding apparatus.

FIG. 7 is a cross-sectional view showing one step of the method of the present invention, showing a mold press molding step.

FIG. 8 is a cross-sectional view showing a second embodiment of the method of the present invention and showing a step of setting and supplying a material to a mold press molding apparatus.

FIG. 9 is a sectional view showing a mold press molding step in the second embodiment of the method of the present invention.

FIG. 10 is a perspective view showing a conventional automobile door trim.

11 is a sectional view taken along line XI-XI in FIG.

[Explanation of symbols]

 10 Automotive Door Trim 20 Door Trim Body 21 Resin Core Material 22 Skin Material 23 Opening 30 Middle Contact Member 31 Middle Contact Core Material 32 Middle Contact Skin Material 33 Insert Metal Fitting 34 Insert Piece 40 Movable Side Mold 41 Fixed Side Mold 42 Cavity 50 Lower mold for mold press molding 51 Extruder 52 Gate 60 Upper mold for mold press molding 61 Vacuum suction hole 62 Vacuum suction pipe 63 Vacuum pump 70 Support frame 80 Resin material

Claims (3)

[Claims] 1. A trim body (2), which is constructed by covering the surface side of a core material (31) of a middle contact portion with a skin material (32) of the middle contact portion.
0) In the molding method of the intermediate contact member (30) mounted on an appropriate place on the surface, the intermediate contact surface material (3) is placed in the injection molding die (40, 41).
After setting 2), the cavity (42) of the injection molding die (40, 41) is filled with resin to mold the intermediate-section core material (31) of the inverse shape. A method for forming an intermediate contact member, comprising integrally adhering an intermediate contact skin material (32) to a recessed surface of a contact core (31). 2. The resin core material (21) and the skin material (22) are integrally molded into a required shape by mold press molding to form a trim body (20), and an appropriate place on the surface of the trim body (20). A method of manufacturing an interior part for an automobile, in which an intermediate contact member (30) is attached to an inner contact part skin material (3) in an injection molding die (40, 41).
2) and insert metal fittings (33) are set,
The cavity (42) of the mold (40, 41) is filled with a resin to form an inversely shaped core material (31) for the contact portion, and the core surface of the contact portion (31) is contacted with the concave portion. The step of forming the intermediate contact member (30) integrally attached with the partial skin material (32) and the upper mold (60) for mold press molding when the upper and lower molds (50, 60) for mold press molding are opened. Inscribed member (3
0) with the metal fitting (34) for insert facing downward, and the upper and lower molds (50, 6) for mold press molding.
0) The skin material (22) of the trim body (20) is positioned and held in the trim body (20), and the resin material (80) which is the material of the resin core material (21) is placed on the mold surface of the lower mold (50) for mold press molding. By setting and supplying the material to be distributed and supplied and by engaging the upper and lower molds (50, 60) for mold press molding with a predetermined clearance, the resin core material (2
1) and the skin material (22) are integrally molded into a required shape, and an insert fitting (3) provided on the center contact member (30)
3) The mold press in which the skin material (22) penetrates into the resin core material (21) and the resin core material (21) is solidified so that the intermediate contact member (30) is integrated with the trim body (20). A method of manufacturing an automobile interior component, comprising: a molding step. 3. A trim core body (20) is formed by integrally molding a resin core material (21) and a skin material (22) into a required shape by mold press molding, and an appropriate place on the surface of the trim body (20). A method of manufacturing an interior part for an automobile, in which an intermediate contact member (30) is attached to an inner contact part skin material (3) in an injection molding die (40, 41).
After setting 2), resin is filled in the cavity (42) of the mold (40, 41) to form an inversely shaped core material (31) of the intermediate portion in which the insert piece (34) is integrally provided. At the same time, an intermediate contact member (30) formed by integrally adhering an intermediate contact skin material (32) to the concave surface of the intermediate contact core material (31).
During the molding step of the above, and when the upper and lower molds (50, 60) for mold press molding are opened, the inner contact member (3
0) is set with the insert piece (34) facing downward, and the upper and lower molds (50, 60) for mold press molding are applied to the skin material (22) in which the opening (23) is opened at the location corresponding to the center contact member (30). ), And a step of supplying and supplying the resin material (80), which is the material of the resin core material (21), on the mold surface of the lower mold (50) for mold press molding, and a mold press molding process. The resin core material (21) and the skin material (22) are integrally press-molded by opening and closing the skin material (22) by tightening the upper and lower molds (50, 60) with engaging pressure. Opening (23)
Through the insert piece (34) of the intermediate contact member (30) into the inside of the resin core material (21) to form the resin core material (21).
By solidifying the inner contact member (30), the trim body (20)
A method for manufacturing an automobile interior part, comprising: