JPH0618724B2 - Manufacturing method of automobile interior parts - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for manufacturing automobile interior parts such as automobile door trims and rear corner trims. The present invention relates to a method of manufacturing an interior part for an automobile, in which a contact member is installed to shorten the manufacturing process of an interior part having an improved design effect, and at the same time, the positioning of the center contact member is facilitated to improve workability.

《Prior Art》 Recently, appearance design is particularly required for automobile interior parts such as automobile door trims. For example, the surface of the product is not made of a single material, but a combination of a cloth and a resin sheet. It is becoming more common to use composite skin materials that combine a plurality of materials such as combination and combination of carpet and cloth.

For example, referring to FIG. 5 and illustrating a conventional automobile door trim, the door trim 1 is integrally attached to a resin core material 2 having a required curved surface shape and a surface side of the resin core material 2, The door trim body 4 is composed of the skin material 3 that imparts the decorativeness, and the contact member 5 having a different appearance and feel from the skin material 3 is attached to a predetermined portion of the trim body 4 by adhesion or the like. It is a composition.

A brief description will be given of a method of manufacturing the door trim 1. First, when the door trim body 4 uses a thermoplastic resin material or a thermoplastic composite resin material as the resin core material 2, these sheet-shaped thermoplastic resin plates are used. Alternatively, after the thermoplastic composite resin plate is preheated and softened, it is drawn into a desired curved shape by a cold press molding die (not shown), and the skin material 3 is also integrally attached during press molding of the resin core material 2. The door trim body 4 is molded.

On the other hand, a cloth sheet such as cloth is often used for the center contact member 5,
An adhesive is applied to the attachment portion of the door trim main body 4, and the center contact member 5 is integrally attached to the door trim main body 4 by a pressure bonding type not shown.

Further, a peripheral groove 6 is formed on the side of the door trim body 4 in order to finish the peripheral edge portion of the center contact member 5 in a good appearance.
By grooving the peripheral edge 5a of the central contact member 5 into the circumferential groove 6, the appearance of the peripheral edge of the central contact member 5 is improved.

<< Problems to be Solved by the Invention >> However, the conventional manufacturing method requires two steps, that is, a step of forming the door trim 4 and a step of adhering the intermediate contact member 5 to the door trim 4, resulting in a large number of steps. Therefore, there is a problem that the cost is increased.

Further, in the center contact portion of the door trim 1, since the center contact member 5 and the skin material 3 of the general portion are doubly laminated,
The skin material 2'of this portion is wasted, and two types of molding dies such as the molding die of the door trim body 4 and the crimping die of the contact member 5 are required, which is also a factor of cost increase.

In addition, the center contact member 5 needs to be accurately positioned in the circumferential groove 6, and when rough work is performed, the terminal 5a of the center contact member 5 sticks out from the circumferential groove 6 and spoils the appearance. At the same time, it has been pointed out that the work of graining the inner connecting member 5 is very troublesome and the workability is deteriorated.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to manufacture an interior part for an automobile, in which, in addition to a skin material used for the interior part, surface contact and an intermediate contact member having a different appearance are set. An object of the present invention is to provide a method for manufacturing an automobile interior part that shortens the process and brings about a large cost reduction, and can easily perform the positioning work of the center contact member, thereby improving the work efficiency.

<Means for Solving the Problems> In order to achieve the above object, the method for manufacturing an automobile interior part according to the present invention is such that after setting the contact member at a predetermined position of the lower die for mold press, the peripheral portion is clamped. The held general skin material is overlaid from the upper side, then the mold pressing upper die is lowered, and the general skin material and the intermediate contact member are positioned between the upper and lower mold pressing dies,
The upper and lower molds for mold press maintain a predetermined clearance between molds, and after the molten resin is supplied from the resin injection port formed in the lower mold for mold press into the upper and lower molds for mold press, the molten resin The upper and lower molds for the mold press are clamped until they reach the inside, and at the same time the resin core material is molded, the general-purpose skin material and the intermediate contact member are integrally attached to the resin core material, and then the intermediate contact member It is characterized in that the skin material for general parts located on the upper surface side of the contact member is cut and removed by cutting the skin material for general parts along the peripheral portion.

<< Operation >> According to the method of the present invention, the intermediate member is simply set in the lower mold for molding, and then the molten resin is supplied into the upper and lower molds for molding to form the upper and lower molds for molding. When tightened, the intermediate contact member can be positioned at a predetermined position by the resin pressure of the molten resin, so that the positioning work of the intermediate contact member can be easily performed.

Furthermore, after setting the center contact member and the skin material of the general part in the upper and lower molds for mold press, supplying molten resin into the upper and lower molds for mold press, and then clamping the upper and lower molds for mold press to form a resin core material. Since the resin core material and the skin material for general parts and the central contact member can be integrally attached together with molding press molding, the resin core material can be molded and the skin material for general part and It is possible to attach the contact member.

<Example> Hereinafter, an example according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a longitudinal sectional view showing an automobile door trim manufactured by applying the method of the present invention, and FIGS. 2 to 4 are sectional views for explaining the steps of the method of the present invention with time.

Referring to FIG. 1, an automobile door trim 10 to which the method of the present invention is applied has a resin core material 11 that is shaped like a curved surface.
And a skin material 12 for general parts that covers the surface of the resin core material 11,
It is mainly composed of the center contact member 13.

More specifically, the resin core material 11 is molded into a required curved surface shape by molding press molding a thermoplastic resin as described later. The material is polypropylene resin in consideration of moldability, cost, mechanical strength and the like. , Polyolefin resin such as polyethylene resin, or ABS
Although a thermoplastic resin material such as a resin is used, a material mixed with a filler such as wood powder may be used if desired. Also,
As the general-purpose skin material 12, a resin sheet such as an ABS mixed PVC sheet or a polyolefin sheet is used.
A cushion layer may be lined on the back side to give a soft feeling.

Next, it is preferable that the center contact member 13 has a different surface appearance and feel from the skin material 12 for general parts, and a cloth is used in this example.

A peripheral groove 14 is formed in the resin core material 11 in order to improve the appearance of the peripheral end portion of the contact member 13.
The peripheral edge end 13a of the central contact member 13 is inserted into the peripheral groove 14 so that the peripheral edge of the central contact member 13 is not frayed, or minute irregularities are conspicuous to the outside, so that the peripheral portion of the central contact member 13 has a beautiful appearance. Is improving.

A method of manufacturing the vehicle door trim 10 having the above structure will be described with reference to FIGS.

First, FIG. 2 shows the contact member 13 and the skin material 1 for general parts.
2 shows the setting step of No. 2, and the apparatus used in the method of the present invention comprises a lower mold 20 for mold press and an upper mold 21 for mold press, and although not shown, the upper mold 21 for mold press has a lifting mechanism. The upper and lower molds 20 and 21 for mold press are provided with mold surfaces that give the resin core material 11 a desired curved surface shape, respectively. And circumferential groove 1
4 is formed on the lower die 20 for molding press to form the peripheral groove 2
2 and convex ridges 23 are formed on the upper die 21 for mold pressing in correspondence with the circumferential groove 22. Then, the center contact member 1 is attached to the lower die 20 for mold press.
3 is set, but at this time, the peripheral edge 1 of the contact member 13
Positioning is performed so that 3a is located in the circumferential groove 22. Then, the skin material 12 for general parts whose peripheral portion is clamped and held by the clamp device 24 is overlapped from the upper side, and the intermediate contact member 13 and the skin material 12 for general part are positioned.

Next, when the positioning of the center contact member 13 and the skin material 12 for general parts is completed, the upper mold pressing die 21 descends, and the upper mold pressing die 21 descends until a predetermined clearance between the molds is obtained. Then, the center contact member 13 and the skin material 12 for general parts are positioned in the upper and lower molds 20 and 21 for mold press. When the mold pressing upper mold 21 is lowered to the predetermined clearance, the molten resin is supplied into the mold pressing upper and lower molds 20 and 21 from the resin injection port 25 formed in the mold pressing lower mold 20. Then, the molten resin is used for the mold press upper and lower molds 2.
Upper and lower molds 2 for mold press until it reaches 0,21
Clamping is performed with 0 and 21 rolls (see FIG. 3). Then, the molten resin is used in the upper and lower molds 20 and 2 for mold press.
The resin amount of a predetermined volume for filling the clearance 1 is predetermined by a resin measuring mechanism (not shown) to fill the clear lands between the molds, and the resin pressure of the molten resin causes the intermediate contact member 13 and the skin material 12 for general parts to The upper surface of the upper mold 21 for mold press is positioned in a pressed state with respect to the mold surface.

The molten resin is cooled and solidified by the mold press upper and lower molds 20 and 21, so that the resin core material is provided with a required curved surface shape along the mold surface shape of the mold press upper and lower molds 20 and 21. 11 is formed, and the inner contact member 13 and the skin material 12 for general parts are integrally attached to the resin core material 11.

As described above, according to the method of the present invention, the resin core material 1 is molded by the upper and lower molds 20 and 21 for mold press, and at the same time, the intermediate contact member 13 and the skin material 12 for general part are attached to the resin core material 11. The resin core material 1 is attached in one step and made in one step
1 molding process and in contact member 13, skin material for general part 1
Adhesive molding of 2 is performed. Reference numeral 26 in FIG. 3 is a molten resin supply passage formed in the lower mold 20 for mold press, and the molten resin is supplied from the nozzle of the extrusion molding machine to the resin injection port 25. Although 25 is set in the set portion of the contact member 13, the installation position of the resin injection port 25 is not particularly limited, and the resin injection ports may be set in a plurality of positions.

Next, when the molding is completed, as shown in FIG. 4, the general portion skin material 12 ′ located on the upper surface side of the contact member 13 is cut along the circumferential groove 14 by the cutting blade 27, and this surplus is cut off. The general-purpose skin 12 'is cut off and the burr 28 formed in the resin injection port 25 is cut to complete the manufacture of the automobile door trim 10.

<< Effects >> As described above, according to the method of the present invention, the following special operational effects are obtained.

According to the method of the present invention, the resin core material is molded in the mold for molding, and at the same time, the skin material for general parts and the contact member are integrally attached to the resin core material. Compared to the two steps required to form the main body and attach the center contact member to the door trim body, the entire molding can be done in one step, resulting in a significant cost reduction by shortening the steps. There are promising benefits.

According to the method of the present invention, since the resin core material is molded and the skin material and the contact member are attached to the resin core material in the mold for molding, the conventional method for molding the door trim main body is used. Since there is no need for two types of molds such as a cold press mold and a pressure bonding mold for adhering a contact member, there is an advantage that molding equipment can be simplified and cost reduction can be expected.

According to the method of the present invention, it is only necessary to set the center contact member in the lower mold for mold press, and then the center contact member is accurately positioned at a predetermined position by the resin pressure of the molten resin by the mold clamping of the upper and lower mold press molds. As a result, the positioning work of the intermediate contact member has conventionally been troublesome, but the positioning work of the intermediate contact member can be performed easily and easily, and the work efficiency is significantly improved.

According to the method of the present invention, the surplus skin material is cut and removed at the portion where the interior parts are in contact with each other, and the useless skin material for the general part is eliminated.

[Brief description of drawings]

1 is a longitudinal sectional view showing an automobile door trim to which the method of the present invention is applied, FIGS. 2 to 4 are sectional views showing the steps of the method of the present invention with time, and FIG. 5 is a conventional automobile door trim. It is explanatory drawing which shows the structure of. 10 …… Automotive door trim 11 …… Resin core material 12 …… Surface material for general parts 13 …… Insulation member 14 …… Surrounding groove 20 …… Lower mold for mold press 21 …… Upper mold for mold press 25 …… Resin injection port 27 …… Cut blade

Claims (1)

[Claims] 1. An intermediate contact member (13) is set at a predetermined position of a mold press lower die (20), and then a general portion skin material (12) having a peripheral edge clamped is superposed from the upper side thereof. Then, the upper mold (21) for mold press is lowered, the skin material (12) for general part and the contact member (13) are positioned between the upper and lower molds (20, 21) for mold press, and the upper and lower mold presses (21) are positioned. While maintaining a predetermined clearance between the molds (20, 21), molten resin is introduced into the upper and lower mold press molds (20, 21) from a resin injection port (25) formed in the lower mold press mold (20). After being supplied, the molten resin is heated by the upper and lower molds (20,
21) Up and down mold for mold press (2
0, 21) are clamped and the resin core material (11) is press-molded, and at the same time, the skin material (12) for general parts and the contact member (13) are integrally attached to the resin core material (11). Then, the outer skin material for general parts (12) is cut along the peripheral edge of the inner contact member (13), so that the outer skin material for general part ( 1
A method for manufacturing an automobile interior part, characterized in that 2 ') is cut and removed.