JPH02206513A - Manufacture of trim parts for automobile - Google Patents

Abstract

PURPOSE:To perform molding of the whole in one process, by a method wherein simultaneously with performance of molding of a resin core material within a mold for a molding a skin material for a general part and an intermediate contacting member are stuck integrally to the resin core material. CONSTITUTION:A top and bottom forces 20, 21 for pressing a molding are provided respectively with mold surfaces giving desired curved surface forms to a resin core material 11, on which projected lines 23 are formed to form circumferential groove. An intermediate contacting member 13 is set up between the top and bottom forces 20, 21. In this instance, positioning of the intermediate contacting member 13 is performed so that a fringe terminal 13a of the same is positioned within a circumferential groove 22. A skin material 12 for a general part whose fringe part is held through clamping with a clamping device 24 is superposed upon the upper part of the same and positioning of the intermediate contacting member 13 and the skin material 12 for the general part are performed. Then the top force 21 is lowered, molten resin is fed within the top and bottom forces 20, 21 for cooling and solidification.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a method for manufacturing automobile interior parts such as automobile door trims and rear corner trims, and in particular, 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 for manufacturing interior parts for automobiles in which a contact member is installed to shorten the manufacturing process of interior parts with enhanced design effects, and the positioning of the intermediate contact member is facilitated to improve workability.

(Prior Art) Recently, exterior design is particularly required for automobile interior parts such as automobile door trims. Composite skin materials made by combining multiple materials, such as carpets and cloth, are increasingly being used.

For example, to explain a conventional automobile door trim as shown in FIG. A door trim body 4 is constructed from a skin material 3 that imparts decorative properties, and a middle and horizontal member 5 having a different appearance and feel from the skin material 3 is attached to a predetermined location of the trim body 4 by adhesive or the like. This is the configuration.

To briefly explain the manufacturing method of this door trim 1, first, when a thermoplastic resin material or a thermoplastic composite resin material is used as the resin core material 2, the door trim body 4 is made of a sheet-shaped thermoplastic resin plate. Alternatively, after preheating and softening the thermoplastic composite resin plate, it is drawn into the desired curved shape using a cold press mold (not shown), and the skin material 3 is also integrally attached to the resin core material 2 during press molding to form the door trim. The main body 4 is molded.

On the other hand, a fabric sheet such as cloth is often used for the middle horizontal member 5,
Adhesive is applied to the attachment location of the door trim body 4, and the middle horizontal member 5 is integrally attached to the door trim body 4 using a pressure bonding mold (not shown).

Furthermore, in order to finish the peripheral end portion of the middle horizontal member 5 with a good appearance, a circumferential groove 6 is formed on the door trim body 4 side.
By carving the peripheral edge end 5a of the middle horizontal member 5 into the circumferential groove 6, the aesthetic appearance of the peripheral edge of the middle horizontal member 5 is improved.

(Problem to be Solved by the Invention) However, the conventional manufacturing method requires two steps: a step of molding the door trim 4 and a step of attaching the middle horizontal member 5 to the door trim 4, resulting in a large number of steps. It has been pointed out that this leads to an increase in costs.

Furthermore, in the living area of the door trim 1, the middle and horizontal members 5 and the skin material 3 of the general area are double laminated, so
The skin material 2' in this portion is wasted, and the fact that two types of molds are required, such as a mold for the door trim body 4 and a crimp mold for the middle and horizontal member 5, also increases costs.

In addition, it is necessary to accurately position the middle horizontal member 5 within the circumferential groove 6, and if the work is performed roughly, the end 5a of the middle horizontal member 5 will protrude from the circumferential groove 6, spoiling the aesthetic appearance. At the same time, it has been pointed out that the wood graining work of the middle horizontal member 5 is extremely troublesome and reduces work efficiency.

The present 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 interior parts for automobiles in which, in addition to the skin material used for interior parts, middle and horizontal members with different surface textures and appearances are provided. To provide a method for manufacturing interior parts for automobiles that shortens the process and brings about a significant cost reduction, and also allows easy positioning work of middle and horizontal members and improves work efficiency.

(Means for Solving the Problems) In order to achieve the above object, the method for manufacturing automotive interior parts according to the present invention includes setting a middle horizontal member at a predetermined location of a lower mold for a mold press, and then clamping the peripheral part. The held skin materials for general parts are overlapped from above, and then the upper die for mold press is lowered, and the skin material for general parts and the middle horizontal member are positioned between the upper and lower dies for mold press. While maintaining the specified clearance between the upper and lower molds, the molten resin is supplied into the upper and lower mold press molds from the resin injection port formed in the lower mold press mold, and then the molten resin spreads throughout the upper and lower mold press molds. At the same time, the upper and lower dies for the mold press are clamped and the resin core material is molded. At the same time, the skin material for the general part and the middle horizontal member are integrally attached to this resin core material, and then the peripheral part of the middle horizontal member is attached. The general part skin material located on the upper surface side of the middle and horizontal member is cut and removed by cutting the general part skin material along the lines.

(Function) According to the method of the present invention, all that is required is to set the middle and horizontal members in the lower mold for molding, and then supply the molten resin into the upper and lower molds for the mold press, and move the upper and lower molds for the mold press into the mold. When tightened, the middle horizontal member can be positioned at a predetermined position by the resin pressure of the molten resin, so it becomes possible to easily perform the positioning work of the middle sandwiching member.

Furthermore, after setting the intermediate member and the skin material for general parts in the upper and lower molds for a mold press, and supplying molten resin into the upper and lower molds for a mold press, the upper and lower molds for a mold press are clamped. The resin core material, the skin material for general parts, and the intermediate member can be integrally attached together with the resin core material. In addition, it becomes possible to attach an intermediate member.

(Embodiments) Hereinafter, embodiments of 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 illustrating the steps of the method of the present invention over time.

In FIG. 1, an automobile door trim 10 to which the method of the present invention is applied includes a resin core material 11 shaped into a required curved surface shape, a general part skin material 12 that covers the surface of the resin core material 11, and an intermediate member. It is roughly composed of 13.

More specifically, the resin core material 11 is molded into the desired curved shape by mold-pressing a thermoplastic resin as described later, but the material is polypropylene, taking into consideration moldability, cost, mechanical strength, etc. , polyolefin resin such as polyethylene resin, or ABS
A thermoplastic resin material such as resin is used, but if desired, a material mixed with a filler such as wood flour may be used. Also,
The skin material 12 for general parts uses a resin sheet such as an ABS-containing PVC sheet or a polyolefin sheet.
The back side may be lined with a cushion layer to give a soft feel.

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

In order to improve the appearance of the peripheral end portion of the habitat part 13, a circumferential groove 14 is formed in the resin core material 11.
The peripheral edge end 13a of the intermediate sandwich member 13 is inserted into this circumferential groove 14, and the beauty of the peripheral edge of the intermediate sandwich member 13 is maintained so that fraying or minute irregularities on the peripheral edge of the intermediate sandwich member 13 are not noticeable to the outside. Improving.

A method of manufacturing the automobile door trim IO having the above structure will be explained based on FIGS. 2 to 4.

First, FIG. 2 shows the intermediate member 13 and the general part skin material 1.
2, the apparatus used in the method of the present invention consists of a lower mold press 20 and an upper mold press 21. Although not shown, the upper mold press 21 is equipped with a lifting mechanism. These upper and lower mold press molds 20 and 21 are each equipped with a mold surface that imparts a desired curved shape to the resin core material 11. And circumferential groove 1
4 (the lower die 20 for mold press has a circumferential groove 2).
2, and a protrusion 23 is formed on the upper die 21 for mold press in correspondence with this circumferential groove 22. Then, the intermediate member 13 is attached to this mold press downstream die 20.
is set, but at this time, the peripheral end 13 of the intermediate member 13
a is positioned within the circumferential groove 22. Then, the intermediate portion member 13 and the general portion skin material 12 are positioned by overlapping the general portion skin material 12 whose peripheral edge portion is clamped and held by the clamp device 24 from above.

Next, when the positioning of the intermediate member 13 and the general part skin material 12 is completed, the upper die 21 for the mold press is lowered, and the upper die 21 for the mold press is moved until a predetermined clearance is obtained between the molds. It is lowered, and the intermediate member 13 and the general part skin material 12 are positioned in the upper and lower mold press molds 20.21. When the upper mold press 21 is lowered to a predetermined clearance, molten resin is supplied into the upper and lower mold press molds 20 and 21 from the resin injection port 25 formed in the lower mold press 20. After that, the molten resin is transferred to the upper and lower molds 2 for the mold press.
Press the upper and lower molds 2 for the mold press until the
Mold clamping is performed between 0.21 and 2.5 seconds (see Figure 3). Then, this molten resin is applied to the upper and lower molds 20 and 21 for mold press.
The amount of resin in a predetermined volume to fill the clearance between the molds is predetermined by a resin measuring mechanism (not shown), and the clearance between the molds is filled, and the resin pressure of this molten resin is used to fill the intermediate horizontal member 13 and the skin material for general parts. 12 is positioned in a depressed manner with respect to the mold surface of the upper die 21 for mold press.

As the molten resin is cooled and solidified by the upper and lower mold brace molds 20 and 21, the resin core material is shaped to have a required curved surface shape along the mold surface shapes of the upper and lower mold brace molds 20 and 21. 11 is formed, and the middle and horizontal members 13 and the general part skin material 12 are integrally attached to the resin core material 11.

As described above, according to the method of the present invention, the resin core material 11 is molded by the upper and lower mold brace molds 20 and 21, and at the same time, the middle and horizontal members 13 and the general part skin material 12 are molded to the resin core material 11. The molding process of the resin core material 11 and the intermediate member 13 are carried out in one step. Adhesion molding of the general part skin material 12 is performed. In addition, the reference numeral 26 in FIG. 3 is a molten resin supply path formed in the lower die 20 for mold press, and molten resin is supplied from the nozzle of the extrusion molding machine to the resin injection port 25. In this example, the resin injection port 25 is set at the set portion of the middle horizontal member 13, the installation location of the resin injection port 25 is not particularly limited, and the resin injection port may be provided at a plurality of locations.

Next, when the forming is completed, as shown in FIG. The general part skin material 12' is cut and removed, and the burr 28 formed on the resin injection port 25 is cut off to complete the production of the automobile door trim 10.

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

■The method of the present invention involves molding the resin core material in a mold and simultaneously attaching the skin material for general parts and the middle and horizontal members to the resin core material, which is different from conventional methods. Compared to the previous two processes that required the molding process of the door trim body and the process of attaching the middle and horizontal members to the door trim body, the entire molding process can be done in one process, resulting in significant cost reductions due to the shortened process. There are benefits that can be expected.

■According to the method of the present invention, the resin core material is molded and the skin material and middle and horizontal members are attached to the resin core material within the molding die, so it is not necessary to use the method for molding the door trim body as in the conventional method. Since there is no need for two types of molds such as cold press molds and crimp molds for attaching intermediate members, the molding equipment is simplified and costs can be reduced.

■According to the method of the present invention, all you have to do is set the middle and horizontal members in the lower die for the mold press, and then use the resin pressure of the molten resin by clamping the upper and lower molds for the mold press to accurately place the middle and horizontal members in the predetermined locations. Since positioning can be performed, the work of positioning the middle and horizontal members can be easily and easily performed, compared to the conventional method of positioning the middle and horizontal members, which has the advantage of significantly improving work efficiency.

■According to the method of the present invention, excess skin material is cut and removed from the living parts of the interior parts and unnecessary skin material for general parts is eliminated, which contributes to weight reduction.

[Brief explanation of the drawing]

Fig. 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 inventive method over time, and Fig. 5 is a conventional automobile door trim. FIG. 2 is an explanatory diagram showing the configuration of. 10...Automotive door trim 11...Resin core material 12...Skin material for general parts 13...Middle horizontal member 14...Peripheral groove 20...Lower die for mold press 21...Mold Upper die for press 25...Resin injection port 27...Cut blade

Claims (1)

[Claims] 1. After setting the intermediate member (13) at a predetermined location of the lower die for mold press (20), overlay the general part skin material (12) whose peripheral part is clamped from above,
Next, the upper die for the mold press (21) is lowered, and the skin material for the general part (12) and the intermediate member (13) are positioned between the upper and lower dies for the mold press (20, 21). While maintaining the specified clearance between the molds (20, 21), the lower mold for mold press (
After supplying the molten resin into the upper and lower mold press molds (20, 21) from the resin injection port (25) formed in 20), until the molten resin spreads throughout the upper and lower mold press molds (20, 21), Upper and lower molds for mold press (20, 21
) is mold-clamped and the resin core material (11) is mold press-molded, and at the same time, the general part skin material (12) and the intermediate member (13) are integrally attached to this resin core material (11), and then By cutting the general part skin material (12) along the peripheral edge of the intermediate member (13), the intermediate member (13) is cut.
13) A method for manufacturing an automobile interior part, characterized in that the general part skin material (12') located on the upper surface side is cut and removed.