JP3136242B2 - Door trim and manufacturing method thereof - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile door trim and a method of manufacturing the same.

[0002]

2. Description of the Related Art A conventional door trim will be described below.

In order to partially soften the armrest 2 and the like in the conventional door trim 1, another pad material 5 is formed as shown in FIG. There is a structure having a structure in which the skin material 4 is adhered to a portion. The pad material 5 is obtained by winding a urethane foam material 7 with eight cloths as shown in FIG.
As shown in (b), a material obtained by injection molding of vinyl chloride 9 is used.

[0004]

However, in the above-mentioned conventional construction, a separate step is required to form the core material 3 of the door trim 1 and the pad material 5, and the man-hour for attaching the pad material 5 is also extra. There were problems such as this.

An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide a door trim which does not require a separate step and reduces the number of processing steps.

It is another object of the present invention to provide a method of manufacturing a door trim which does not require a separate step and reduces the number of processing steps.

[0007]

In order to achieve this object, a door trim of the present invention supplies a molten resin to a lower mold, lowers the upper mold, fills and presses the resin into the cavity, and presses the resin. A synthetic resin elastomer is injected into a clearance formed between the slide die provided in the upper die and the core material on a required portion of the molded core material, and this portion has elasticity. It has a configuration in which the pad material is integrally formed.

According to another aspect of the present invention, there is provided a method for manufacturing a door trim, comprising the steps of: supplying a molten resin to a lower mold; and lowering the upper mold to fill and press the resin into the cavity to form a core material. a step of molding a and held there for several seconds in this state, to form a clearance between the raised slide type provided in the upper mold slide and the core material, of the slide in this clearance A step of injecting the molten synthetic resin elastomer from the gate to form a pad material having a predetermined hardness and elasticity.

[0009]

According to this structure, the pad material is injection-molded into a required portion of the core material by the slide die provided in the upper mold, so that the core material and the pad material can be molded by the same molding device. There is no need for a separate process, and the man-hour for attaching the pad material is reduced.

Further, by this method, the molten resin is supplied to the lower mold, the resin is filled and pressed into the cavity by the upper mold, and the core material is formed.
Since the molten synthetic resin elastomer is injected into the clearance between the slide mold and the core material to form an elastic pad material, it is possible to mold the core material and the pad material with the same molding device. There is no need for a separate process. Also, the man-hour for attaching the pad material is reduced.

[0011]

An embodiment of the present invention will be described below with reference to the drawings. The same components as those shown in the conventional example are denoted by the same reference numerals. In the figure, 1 is a door trim, 3 is a core material, and 5 is a pad material.

As shown in FIG. 1 and FIG. 2, the door trim 1 of the present embodiment is used to soften the armrest 2 portion.
A soft pad material 5 is welded to the armrest 2 of the core material 3, and an insulated cloth 6 is attached to the upper part of the armrest 2.

The core material 3 is made of PP (polypropylene), and is made of, for example, 10% talc to improve heat resistance.
And the pad material 5 is a colored PP elastomer having a hardness of 50 to 60.

As shown in FIG. 3, a molding apparatus 10 using a press molding method has a core material 3 between an upper mold 11 and a lower mold 12.
Are formed, and the lower mold 12 is provided with a plurality of gates 15. The upper die 11 is provided with a slide die 13 which is located at the armrest 2 portion of the core member 3 and rises and falls, and a gate 15 is formed on the slide die 13.

Next, a method of manufacturing the door trim will be described.

First, from the gate 15 of the lower mold 12 to 180-2
The molten resin of the PP composite material at 00 ° C. is supplied, the upper mold 11 is lowered, the resin is filled in the cavity, and pressed, to form the core material 3 of the door trim 1.

After maintaining this state for about 10 seconds, the slide mold 13 is raised to maintain a predetermined clearance between the slide mold 13 and the core member 3, and the gate 1 of the slide mold 13 is moved.
Injecting molten resin of PP elastomer from 5, PP
Since the elastomer and the PP composite are the same resin, they are easily welded to each other to form the pad material 5 on the armrest 2. In addition, there is no need to devise a parting-off portion between the PP elastomer and the PP composite material, and the PP elastomer itself has a soft feeling without foaming. The time required from the start of molding the core material 3 to the molding of the pad material 5 is about 40 seconds.

Furthermore, when the core material 3 of the door trim 1 is injection-molded after the PP elastomer is inserted in advance, the PP elastomer is damaged by heat when the core material 3 is injected. By injecting, no such problem occurs.

As described above, since the pad material 5 is injection-molded to a required portion by the slide die 13 provided on the upper die 11, the core material 3 and the pad material 5 are formed by the same molding apparatus 10.
And a separate process is not required. Also, the man-hour for attaching the pad material 5 is reduced.

The time required for molding the core material 3 of the door trim 1 is about 40 seconds. After 10 seconds from the start of molding, the PP elastomer is injected and the molding of the pad material 5 is completed by the time the molding of the core material 3 is completed. Therefore, the total molding time does not exceed 40 seconds.

As shown in FIG. 4, a pad material 5 made of PP elastomer is injection-molded on the core material 3 of the door trim 1, and then a skin material 4 is adhered to the entire core material 3 by vacuum molding or the like, thereby giving a sense of quality. Some have been issued.

[0022]

As described above, according to the present invention, the molten resin is supplied to the lower mold, and the upper mold is lowered to fill and press the resin in the cavity. Inject synthetic resin elastomer from the slide mold provided in the mold,
By forming the pad material having elasticity in this portion, the core material and the pad material can be molded by the same molding device, so that a separate process is not required, and the man-hour for attaching the pad material is reduced. Door trim can be obtained.

The present invention also provides a step of supplying a molten resin to a lower mold and a step of lowering the upper mold to fill the cavity with the resin.
Pressing and molding the core material, holding in this state for several seconds, raising the slide mold provided in the upper mold, and melting the slide mold and the core material from the slide mold gate into the clearance between the slide mold and the core material Injecting a resin elastomer to form a pad material having elasticity of a predetermined hardness,
It is possible to form a core material and a pad material with the same molding device, so that a separate process is not required, and a method of manufacturing a door trim in which the number of steps for attaching the pad material is reduced.

[Brief description of the drawings]

FIG. 1 is a front view of a door trim according to an embodiment of the present invention.

FIG. 2 is a partial perspective view of the door trim.

FIG. 3 is a cross-sectional view showing a schematic configuration of a door trim forming apparatus.

FIG. 4 is a sectional view of a door trim according to another embodiment of the present invention.

FIG. 5 is a perspective view of a conventional door trim.

FIG. 6A is a perspective view of the pad material. (B) It is a perspective view of the other pad material.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Door trim 2 Armrest 3 Core material 5 Pad material 10 Molding device 11 Upper die 12 Lower die 13 Slide die 15 Gate

Claims (2)

(57) [Claims] 1. A by supplying a molten resin to the lower die, lowers the upper die to the required portions of the core which is formed by filling and press the resin into the cavity, the slide type provided in the upper mold and The core
And injecting a synthetic resin elastomer clearance within which is formed between the wood, scratch pad material having elasticity in this part
A door trim characterized by being formed on a body . 2. A step of supplying a molten resin to a lower mold, a step of lowering the upper mold, filling and pressing a resin in a cavity to form a core material, and holding this state for several seconds. the slide type and the core material by raising the slide type provided in the upper die
Forming a clearance between, and injecting a molten synthetic resin elastomer from the gate of the scan <br/> slide type in this clearance, that and a step of forming a pad material having an elasticity of a predetermined hardness A method of manufacturing a door trim, which is characterized by: