JPH10138281A - Injection molded product with integrated skin and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce a skin-integrated injection molded product using a single skin material or a skin material which is a joint of different types of skins at low cost and efficiently. A first skin is formed on a molding surface of a first mold.
a, and the second skin 7 is set on the molding surface 17a of the second mold 17 so as to cover the gate 23a.
The molten molding raw material R is injected from the gate 23a of the second mold 17 and the injection pressure pushes the second skin 7 toward the first skin 5 so as to be along the molding surface 15a of the first mold 15 and the skin thereof. The adjacent end 7a is brought into close contact with the back surface of the adjacent end 5a of the first skin 5 by the injection pressure of the melt forming raw material R in a surface contact state. The melt forming raw material R is solidified, and the first and second skins 5,
The door trim in which the skin material 9 made of 7 is integrally provided on the surface of the core material 3 is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a skin-integrated injection-molded product and a method for producing the same, and more particularly, to a skin-integrated injection-molded product made of a single or different material, color, pattern, and the like. It is intended to be manufactured inexpensively and efficiently.

[0002]

2. Description of the Related Art For example, a door trim or an instrument panel as an interior part of an automobile is constituted by integrally covering a surface of a hard resin core material constituting a trim body or the like with a skin material. For example, as disclosed in Japanese Patent Application Laid-Open No. 7-276421, a single skin material is integrally provided on the surface of a core material.

[0003] It is preferable to use two different types of skins as the skin material, since it is possible to present a differently-designed surface and improve the design.

[0004] Such a skin material composed of two kinds of skins is formed by bonding, suturing or welding the adjacent ends of the two kinds of skins with an adhesive prior to molding. It is generally finished in advance as a single skin material.

On the other hand, there is a method in which two kinds of skins are separately adhered to the surface of a heartwood (Japanese Utility Model Application Laid-Open No. 61-146455).
Reference).

Further, as another method, there is a method in which two kinds of skins are set on a molding surface of one mold of a split mold, and a molten molding material is filled in a cavity to integrate the two skins. (See JP-A-8-23086).

[0007]

However, in the above-mentioned Japanese Unexamined Patent Application Publication No. 7-276421, a molding material is set on a molding surface of a metal mold at the time of molding, and a molten molding material is injected into a cavity in a mold-clamped state. In order to set the skin material on the forming surface of the mold, it is necessary to position the skin material with a needle-like pin or to position it with an adhesive. In the latter case, there is a problem that pin marks remain on the surface of the molded product, and in the latter case, the adhesive protrudes and the surface of the molded product is soiled.

[0008] On the other hand, in a method of bonding two adjacent types of skin with adjacent ends of the skin with an adhesive, a mist of the adhesive drifts to a work place and the working environment is deteriorated. Furthermore, an adhesive application step is required, and the number of manufacturing steps and manufacturing time is increased by that amount, and additional equipment must be provided.
There is a problem that the production cost rises. In addition, a sewing machine and a welding device are also required in the method of sewing and welding, and the number of facilities increases as in the former case, resulting in a rise in manufacturing costs.

The method disclosed in Japanese Utility Model Laid-Open Publication No. Sho 61-146455 is the same as the method using an adhesive, but similarly to the above, increases the cost, stains the surface, deteriorates the working environment, reduces the number of manufacturing steps and equipment. There are problems such as an increase.

According to the method disclosed in Japanese Patent Application Laid-Open No. H08-23086, the adjacent ends of the two skins are merely overlapped, and the overlapping state is such that one adjacent end of the skin is connected to the other. Since it is in a line contact state in which it abuts against the adjacent end, there is a possibility that the molten molding material leaks from the adjacent end of the skin, and the appearance is deteriorated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to position a single skin material when an integrally molded skin product such as a door trim is an injection molded product. The goal is to improve the appearance by eliminating pin marks. Furthermore, at least two kinds of skins are integrated simultaneously with the injection molding of the hard resin core material without using an adhesive, a sewing machine, a welding device, etc. Another object of the present invention is to improve the appearance by eliminating the surface contamination by the adhesive and the leakage of the raw material from the end portion of the skin adjacent to the skin, while molding the skin-integrated injection molded product.

[0012]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a method for positioning a single skin material in a predetermined area by using the injection pressure of a raw material for melt molding, or using a split mold. Two skins are separately set in each of the two molds to constitute, and one of the skins is combined with the other by utilizing the injection pressure of the raw material for melt molding. .

More specifically, the present invention is directed to a skin-integrated injection molded product and a method for producing the same, and has taken the following solutions.

That is, the first and second means for solving the present invention relate to the former skin-integrated injection molded article,
Assuming that the skin material is an injection-molded product integrally provided in a predetermined region of the surface of a hard resin core material obtained by injection-molding a melt molding raw material, the core material is formed by injection pressure of the melt molding raw material. Characterized in that it is located in a predetermined area on the surface of the.

[0015] A second solution of the present invention is a skin integral injection molding wherein a skin material comprising a first and a second skin adjacent to each other is integrally provided on a surface of a hard resin core material obtained by injection molding a melt molding raw material. Assuming a product, one of the first and second skins is brought into close contact with the back surface of the other skin adjacent end by the injection pressure of the molten molding material, and is not separated by the core material. It is characterized by being integrated.

The third to sixth solutions of the present invention relate to the latter method for producing a skin-integrated injection-molded article, and the third solution of the present invention relates to a method in which a single skin material is used for melt-forming raw materials. Assuming a method of manufacturing a skin-integrated injection-molded product integrally provided in a predetermined region of the surface of the injection-molded hard resin core material,
A first mold having a molding surface corresponding to the surface shape of the skin-integrated molded product, and a second mold having a molding surface corresponding to the back surface shape of the skin-integrated molded product and having a gate opened in the molding surface. Is prepared. Then, first, the skin material is set on the molding surface of the second mold of the molding die so as to cover the gate. Next, the molten molding material is injected from the gate of the second mold in the mold-clamped state of the molding die, and the skin material is pushed toward the first mold side by the injection pressure to follow the molding surface of the first mold. Let Thereafter, by solidifying the melt-forming material, a skin-integrated injection-molded article is provided in which the skin material is positioned integrally with a predetermined region of the surface of the hard resin core material obtained by injection-molding the melt-forming material. And

According to a fourth solution of the present invention, in the third solution, a plurality of gates are opened on the molding surface of the second mold, and one of the gates is closed by a skin material. It is assumed that Then, the injection of the molten molding material from the gate closed with the skin material is performed prior to the other gates, and the molten molding material injected with priority is over the outer end portion of the skin material and outside thereof. After that, the molten molding material is injected from another gate.

According to a fifth aspect of the present invention, there is provided a skin integral injection molding wherein a skin material comprising a first and a second skin adjacent to each other is integrally provided on a surface of a hard resin core material obtained by injection molding a melt molding material. Assuming a method of manufacturing a product, a first mold having a molding surface corresponding to the surface shape of the skin-integrated injection molded product, and a molding surface having a molding surface corresponding to the back surface shape of the skin-integrated molded product are provided with a gate. A split mold including an opened second mold is prepared. First, the first skin is set on the molding surface of the first mold of the molding die, and the second skin is set on the molding surface of the second mold of the molding die so as to cover the gate. Next, the molten molding material is injected from the gate of the second mold in the mold clamping state of the mold, and the injection pressure pushes the second skin toward the first skin so as to follow the molding surface of the first mold. At the same time, the skin adjacent end is brought into close contact with the back surface of the adjacent end of the first skin by the injection pressure of the molten molding material. Thereafter, by solidifying the melt-forming raw material, a skin material composed of the first and second skins adjacent to each other is integrally provided on a surface of a hard resin core material obtained by injection-molding the melt-forming raw material, and is a skin-integrated injection-molded product. It is characterized by obtaining.

According to a sixth aspect of the present invention, in the fifth aspect, a plurality of gates are opened on the molding surface of the second mold, and one of the gates is closed by the second skin. It is assumed that Then, the injection of the molten molding material from the gate closed by the second skin is performed prior to the other gates, and the molten molding material injected preferentially exceeds the edge of the second skin adjacent to the skin. After flowing to the first skin side, the molten molding material is injected from another gate.

With the above arrangement, in the first, third and fourth solving means, a single skin material is pushed to the first mold side by the injection pressure of the molten molding raw material, and is pushed along the molding surface, so that the melt molding is performed. Since the raw material is positioned in a predetermined region on the surface of the hard resin core material obtained by injection molding, even when the skin material is set with a pin when setting the skin material on the molding surface of the second mold, the pin mark remains on the back surface of the molded product. Even if it remains and does not remain on the surface of the molded product and is positioned with an adhesive, the protruding adhesive will adhere to the back of the molded product, and in any case, the pin marks and the protruding adhesive will be exposed to the public. It does not improve the appearance.

With the above arrangement, in the second, fifth and sixth solving means, the second skin is pushed to the first skin side by the injection pressure of the molten molding material, and the end adjacent to the first skin is adjacent to the first skin. Because it can be in close contact with the back surface of the end,
At the boundary between the two, a material intrusion prevention band is formed over a predetermined width so that no gap is formed. During molding, the molten molding material does not leak to the surface side from the adjacent ends of the first and second skins, and the appearance is good. improves.

Further, when the melt-forming raw material is solidified to form a core material, the core material backs and integrates the first and second skins to form a single-piece skin material, which is firmly joined. You. Therefore, there is no need for means such as bonding with an adhesive, suturing, or high-frequency welding, and there is no increase in the number of manufacturing steps or deterioration of the working environment due to the use of an adhesive, and low-cost and short-time injection molding of the epidermis. Goods are obtained.

In particular, in the fourth and sixth solutions, the melt-forming raw material injected from one gate flows from the central portion of the single skin material or the second skin toward the periphery and covers the whole. Therefore, even if the molten molding material injected with a time lag from another gate thereafter reaches the outer end of the single skin material or the adjacent edges of the first and second skins, the single skin material The outer end portion or the end portion adjacent to the skin is protected by the molten molding raw material that has reached and is solidifying, and the intrusion of the molten molding raw material injected later is prevented, so that leakage of the raw material is reliably prevented.

[0024]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIGS. 1 and 2 show a skin-integrated injection-molded product according to Embodiment 1 of the present invention. In this example, the skin-integrated injection-molded product is a door trim 1 as an interior part of an automobile. Here are some cases. The door trim 1 is provided with a door trim main body constituting an interior component main body, and the door trim main body is made of a hard resin core material obtained by injection molding a melt-molded raw material made of polypropylene (PP), acrylonitrile-butadiene-styrene (ABS) resin, or the like. 3 A single skin material 9 is provided in a predetermined region of the surface of the core member 3 (door trim main body) on the vehicle interior side, that is, substantially the upper half of the surface of the core member 3 (above the armrest portion of the door trim 1).
Are coated integrally in a substantially rectangular shape, and the core material 3 is exposed from the periphery and the lower half thereof.

As a feature of the present invention, the skin material 9 is formed by the injection pressure of the melt-forming raw material R (shown in FIGS. 4 and 5) and substantially the upper half of the surface of the core material 3 (above the armrest portion of the door trim 1). It is positioned as

The skin material 9 is made of cloth. In this example, the skin material 9 has a two-layer structure in which a backing material 13 is adhered to the back surface of the cloth 11 which is the main body. In addition, this backing material 1
3 can be omitted. A substantially rectangular circumferential groove 3a is formed on the outer periphery of the core material 3 in the area covered with the skin material 9, and the outer end of the skin material 9 is fitted into the circumferential groove 3a.

Next, the door trim 1 constructed as described above.
The manufacturing procedure will be described with reference to FIGS. 3 to 5, but before that, an apparatus used for manufacturing will be briefly described. As shown in FIGS. 3 to 5, the apparatus includes a first mold 15 which is a fixed mold.
And a split mold 19 composed of a movable mold and a second mold 17. The first mold 15 has a molding surface 15a.
Are formed corresponding to the surface shape of the door trim 1, and a molding surface 17a is formed on the second mold 17 corresponding to the rear surface shape of the door trim 1, and the door trim 1 is sandwiched between the two in a mold-clamped state. A cavity 21 for injection molding is formed. Also, the molding surface 17a of the second mold 17 has
Three gates 23a are opened side by side in the vertical direction, and one (upper) gate 23a is open in the upper half of the molding surface 17a and is closed by the skin material 9. Each of the gates 23a includes a runner 23b and a sprue 2
It is connected to the nozzle 25a of the injection machine 25 via 3c. 25b is a cylinder constituting the main body of the injection machine 25, 2
Reference numeral 5c denotes a screw arranged in the cylinder 25b, and the melt forming material R
Is injected from each gate 23a into the cavity 21 through the nozzle 25a, the sprue 23c and the runner 23b. Further, the runner 23b has first and second
The on-off valves 27, 29 are interposed so as to be located between the three gates 23a, and the first and second on-off valves 27, 29 are used when the molten raw material R is introduced only into the upper gate 23a.
When the molten forming raw material R is introduced into the middle gate 23a, the first opening / closing valve 27 is opened and the second opening / closing valve 29 is kept closed. At the time of introduction, two first opening and closing valves 27 and 29 are opened together so that two first
And the second on-off valves 27 and 29 are controlled to open and close.

The procedure for manufacturing the door trim 1 using the above-described apparatus is as follows. First, as shown in FIG.
The mold 17 is retracted, the mold 19 is opened, and the skin material 9 is opened.
With the fabric 11 facing the first mold 15 side.
The second mold 17 is set on the molding surface 17a of the second mold 17 by fixing it with a needle-like pin or an adhesive, and the skin material 9 closes the upper gate 23a opening in the upper half of the molding surface 17a. In this state, the first and second on-off valves 27 and 29 are both closed to prevent the molten raw material R from being introduced into the middle and lower gates 23a.

Next, as shown in FIG. 4, the second mold 17 is advanced to fasten the mold 19, and the injection machine 25 is operated in this mold clamped state. The melt forming raw material R is introduced into the upper gate 23a thus obtained, and the melt forming raw material R is injected into the cavity 21 from the upper gate 23a prior to the other two gates 23a.

As a result, the skin material 9 is pushed toward the first mold 15 by the injection pressure of the molten molding material R injected from the upper gate 23a and is made to follow the molding surface 15a of the first mold 15.

When the molten material R preferentially injected flows from the center of the skin material 9 toward the periphery and exceeds the outer end, the first opening / closing valve 27 is opened, and the first opening / closing valve 27 is opened. The molten forming raw material R, whose flow has been stopped by the valve 27, is introduced into the middle gate 23a, the molten forming raw material R is injected from the middle gate 23a, and then the second on-off valve 29 is opened with a predetermined time lag to melt. The molding material R is transferred to the lower gate 23a.
And the molten raw material R is injected from the lower gate 23a (see FIG. 5).

At this time, the melt-forming raw material R previously injected from the upper gate 23a flows from the central portion of the skin material 9 toward the periphery and covers the whole, and thereafter, the middle and lower gates 23a Since the solidification is progressing more than the molten molding raw material R injected with a time lag from the above, it is necessary to prevent the molten molding raw material R injected later from entering between the outer end portion of the skin material 9 and the molding surface 15a. It can be prevented by the molten molding raw material R which has been injected and solidified, and the molten molding raw material R can be reliably prevented from leaking to the surface side.

After injecting the melt forming raw material R from each gate 23a and filling the cavity 21 as described above, FIG.
As shown in FIG. 6, the hardening material R is solidified and the hard resin core material 3 is injection-molded, so that the skin material 9 is positioned in a predetermined region on the surface of the hard resin core material 3 obtained by injection-molding the melting material R. Door trim 1 provided integrally
Get.

As described above, in this embodiment, since the single skin material 9 is positioned in a predetermined region on the surface of the core material 3 by the injection pressure of the melt forming raw material R, the skin material 9 is placed on the molding surface of the second mold 17. 1
When the pin 7a is positioned and set with a pin, a pin mark is formed on the back surface of the product, so that the pin mark cannot be seen from the front side of the molded product, and the appearance can be improved. In addition, even in the case of positioning using an adhesive, the protruding adhesive adheres to the back surface of the molded product, so that the appearance can be similarly improved without being noticed by human eyes.

(Embodiment 2) FIGS. 6 and 7 show a skin-integrated injection-molded product according to Embodiment 2 of the present invention. Also in this example, the skin-integrated injection-molded product is a door trim 1 as an interior part of an automobile. Here are some cases. The door trim 1 is provided with a door trim main body constituting an interior component main body. This door trim main body is formed by melt molding made of polypropylene (PP), acrylonitrile / butadiene / styrene (ABS) resin or the like as in the first embodiment. The core material 3 is made of a hard resin core material 3 obtained by injection molding of a raw material, and the entire surface of the core material 3 (door trim body) on the vehicle interior side is covered with the first embodiment.
Unlike the single skin material used in
And a skin material 9 composed of the second skins 5 and 7 is integrally coated.

The first skin 5 is made of resin, and in this embodiment, for example, thermoplastic olefin (TPO)
Alternatively, it is a single layer made of a resin sheet of a polypropylene (PP) film, but has a two-layer structure in which a foam layer made of a soft foam of polypropylene (PP) is integrally joined to the back surface thereof, or polyvinyl chloride (PVC). And a solid layer of polypropylene (PP) and a solid layer of polypropylene (PP). The first skin 5 is formed into a predetermined shape in advance by slash molding, vacuum molding, or the like so as to fit a molding surface 15a of a first mold 15 of a molding die 19 described later (see FIG. 8).

The second skin 7 is made of cloth as in the first embodiment, and has a two-layer structure in which a backing material 13 is adhered to the back surface of a fabric 11 as a main body. May be omitted.

The first skin 5 covers the entire surface of the core material 3 except for substantially the upper half of the surface thereof (above the armrest of the door trim 1), and the second skin 7 covers the first skin.
The area other than the covering area of the skin 5, that is, the substantially upper half of the surface of the core material 3 (above the armrest portion of the door trim 1) is covered in a substantially rectangular shape. The first skin 5 may be covered in the vertical direction up to the armrest portion of the door trim 1, and the core 3 may be exposed therebelow.

As a feature of the present invention, the skin adjacent edge 7a (outer peripheral edge) of the second skin 7 is superimposed on the skin adjacent edge 5a (inner peripheral edge) of the first skin 5 from the back. Thereby, the skin adjacent end 7a of the second skin 7 is brought into close contact with the back surface of the skin adjacent end 5a of the first skin 5 by the injection pressure of the melt forming raw material R (shown in FIGS. 9 and 10). And are integrated with each other so as not to be separated by being backed by the core material 3. A substantially rectangular circumferential groove 3a is formed on the outer periphery of the second skin 7 covering area of the core material 3, and the overlapping portion of the skin adjacent ends 5a, 7a of the first and second skins 5, 7 forms the circumferential groove 3a. And the end 5a of the first skin 5 adjacent to the skin is sunk into the circumferential groove 3a. This allows
In addition to preventing the adjacent skin end 5a of the first skin 5 from being turned up, when the first skin 5 has a foam layer, after removal of the mold, the skin adjacent end 5a is swollen by the elasticity of the foam layer and the periphery is expanded. The appearance is prevented from deteriorating due to being removed from the groove 3a and visible from the outside.

Next, the door trim 1 constructed as described above.
Will be described with reference to FIGS. The device used for the manufacture is the same as the device used in the first embodiment, and the description is omitted.

First, as shown in FIG. 8, the second mold 17 is retracted to open the mold 19, and the first skin 5 is set on the molding surface 15a of the first mold 15 of the mold 19. . At this time, the outer end of the first skin 5 is fixed to the outer end of the first mold 15 with a needle-like pin or an adhesive. Therefore, the portion is cut off by trimming after molding, and does not remain on the molded product as scratches or dirt. A substantially rectangular opening is formed in the first skin 5 corresponding to the bonding region of the second skin 7, and the opening edge of the rectangular opening is bonded to the first and second skins 5, 7. In the state, it is an edge portion which is adjacent to the outer peripheral edge of the second skin 7 so as to face the outer peripheral edge. Further, the second skin 7 is placed on the second mold 7 with the cloth 11 facing the first mold 15.
The needle 17 is set on the molding surface 17a of the die 17 with a needle-like pin or an adhesive, and the second skin 7 closes the upper gate 23a that opens in the upper half of the molding surface 17a. In this state, the first and second on-off valves 27 and 29 are both closed to prevent the molten raw material R from being introduced into the middle and lower gates 23a.

Next, as shown in FIG. 9, the second mold 17 is advanced to fasten the mold 19, and the injection machine 25 is operated in this mold clamped state. The melt forming raw material R is introduced into the separated upper gate 23a, and the melt forming raw material R is injected into the cavity 21 from the upper gate 23a in preference to the other two gates 23a.

Thus, the second skin 7 is pushed toward the first skin 5 by the injection pressure of the molten molding material R injected from the upper gate 23a, and the molding surface 15a of the first mold 15 is pressed.
Along.

Then, the melt-forming raw material R injected preferentially flows from the central portion of the second skin 7 toward the periphery and crosses the skin-adjacent end 7a. The first skin 5 is brought into close contact with the back surface of the skin adjacent end 5a in a surface contact state by the injection pressure of the melt forming raw material R. In this state, both end portions 5 of the first and second skins 5 and 7 are adjacent to each other.
A raw material intrusion prevention zone is formed at a boundary between a and 7a without any gap over a predetermined width, and thereafter, the other two gates 23a are formed.
The intrusion of the molten molding material R injected from the above is prevented by the material intrusion prevention zone.

As described above, when the molten material R preferentially injected flows to the first skin 5 side beyond the skin adjacent end 7a of the second skin 7, the first opening / closing valve 27 is opened, The molten forming raw material R, whose flow has been stopped by the first opening / closing valve 27, is introduced into the middle gate 23a, the molten forming raw material R is injected from the middle gate 23a, and then the second opening / closing valve 29 is opened with a predetermined time difference. It is opened and the melt forming raw material R is introduced into the lower gate 23a, and the melt forming raw material R is injected from the lower gate 23a (see FIG. 10).

At this time, the melt-forming raw material R previously injected from the upper gate 23a flows from the center of the second skin 7 toward the periphery and covers the whole, and thereafter, the middle and lower gates Since the solidification is progressing more than the melt forming raw material R injected with a time lag from 23a, the melt forming raw material R injected later is changed to the first and second skins 5,7.
Can be prevented by the melt-forming raw material R which has been injected and solidified in advance and intrudes into the superposed portions 5a and 7a of the skin adjacent ends 5a and 7a. Leakage to the surface side can be reliably prevented.

After injecting the melt forming raw material R from each gate 23a and filling the cavity 21 in this manner, FIG.
As shown in FIG. 0, the hardening material R is solidified and the hard resin core material 3 is injection-molded, so that the skin material 9 including the first and second skins 5 and 7 adjacent to each other forms the melting material R. The door trim 1 integrally provided on the surface of the injection molded hard resin core 3 is obtained.

The door trim 1 thus obtained is
As shown in FIG. 6, the skin adjacent end 7 a of the second skin 7 comes into surface contact with the back surface of the skin adjacent end 5 a of the first skin 5 and is lined and integrated by the core material 3 so as not to be separated.
It is a solid skin material 9 and is firmly joined.

Therefore, in addition to the functions and effects of the first embodiment, there is no need for means such as bonding with an adhesive, suturing, and high-frequency welding, and the use of the adhesive increases the number of manufacturing steps and deteriorates the working environment. Thus, a good looking door trim 1 can be obtained inexpensively and efficiently in a short time at low production cost.

[0051]

As described above, the first, third, and fourth aspects of the present invention are described below.
According to the present invention, a single skin material is set on the mold molding surface side serving as the back surface of the molded product, and is positioned by pressing against the mold molding surface side serving as the molded product surface by the injection pressure of the molten molding material. In addition, traces of pins for setting the skin material and protrusion of the adhesive are hidden on the back side of the molded product, so that the appearance can be improved.

According to the present invention according to claims 2, 5, and 6,
The second skin is pushed to the first skin side by the injection pressure of the melt-forming raw material, and the skin adjacent end is brought into close contact with the back surface of the skin adjacent end of the first skin, so that in addition to the above effects, Raw materials can be prevented from leaking from the adjacent ends of the first and second skins to improve the appearance. In addition, since the first and second skins are lined with a core material and firmly joined as a single skin material, there is no need to employ means such as adhesive bonding, stitching, and high-frequency welding. It is possible to obtain a skin-integrated injection-molded product at a low production cost and in a short time without increasing the number of manufacturing steps or deteriorating the working environment due to the use of the.

In particular, according to the present invention according to claims 4 and 6, the outer end portion of a single skin material or the adjacent end portions of the first and second skins are covered with the previously injected melt-forming material. The molten molding material injected later is prevented from entering the outer end portion of the skin material or the overlapped portion of the both skin adjacent ends, so that leakage of the raw material is reliably prevented and contamination of the surface of the molded product is prevented. be able to.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a door trim according to a first embodiment.

FIG. 2 is a perspective view of a door trim according to the first embodiment.

FIG. 3 is a manufacturing process diagram showing a state in which a first skin and a second skin are set in a mold in an open state in the first embodiment.

FIG. 4 is a manufacturing process diagram showing a state in which the second skin is pushed to the first skin side by the injection pressure of the melt-forming raw material in the first embodiment.

FIG. 5 is a manufacturing process diagram showing a state where the door trim is formed in the first embodiment.

FIG. 6 is a longitudinal sectional view of a door trim according to a second embodiment.

FIG. 7 is a perspective view of a door trim according to the second embodiment.

FIG. 8 is a manufacturing process diagram showing a state in which a first skin and a second skin are set in a mold in an open state in the second embodiment.

FIG. 9 is a manufacturing process diagram showing a state in which the second skin is pushed to the first skin side by the injection pressure of the melt-forming raw material in the second embodiment.

FIG. 10 is a manufacturing process diagram showing a state where a door trim is formed in the second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Door trim (skin-integrated injection molded product) 3 Core material 5 1st skin 5a 1st skin adjacent edge of 1st skin 7 2nd skin 7a 2nd skin adjacent edge of skin 9 Skin material 15 1st mold 15a Molding surface 17th 2 mold 17a Molding surface 19 Mold 23a Gate R Melt molding raw material

Claims (6)

[Claims] 1. A skin-integrated injection-molded product in which a single skin material is integrally provided in a predetermined region on a surface of a hard resin core material obtained by injection-molding a melt-forming raw material, wherein the skin material is formed of a melt-forming raw material. A skin-integrated injection-molded product, which is positioned in a predetermined region on the surface of the core material by injection pressure. 2. A skin-integrated injection-molded article in which a skin material comprising a first and a second skin adjacent to each other is integrally provided on a surface of a hard resin core material obtained by injection-molding a melt-forming raw material. And one end adjacent to one skin of the second skin is in close contact with the back surface of the other end adjacent to the skin by the injection pressure of the molten molding material, and is integrated so as not to be separated by the core material. Injection molded product with integrated skin. 3. A method for manufacturing a skin-integrated injection-molded product, wherein a single skin material is integrally provided in a predetermined region of a surface of a hard resin core material obtained by injection-molding a melt-forming raw material, wherein the skin-integrated injection-molded product is provided. Divided mold comprising a first mold having a molding surface corresponding to the surface shape of the first mold, and a second mold having a molding surface corresponding to the back surface shape of the integrally molded skin product and having a gate opened in the molding surface. A mold is prepared, and the skin material is set on the molding surface of the second mold of the molding die so as to cover the gate. Then, the molten molding material is fed from the gate of the second mold in the mold-clamped state of the molding die. By injecting, the skin material is pushed toward the first mold side by the injection pressure and made to follow the molding surface of the first mold, and then, the skin material is solidified by solidifying the melt molding material. Positioned in a predetermined area on the surface of the injection molded hard resin core Method for producing an integral skin molded article, characterized in that to obtain the integral skin injection molded article provided on the body. 4. A plurality of gates are opened on the molding surface of the second mold, one of which is closed by a skin material, and a gate from the gate closed by the skin material is provided. The injection of the molten molding material is performed prior to the other gates, and after the molten molding material that has been preferentially injected flows over the outer end of the skin material to the outside thereof, the molten molding material is discharged from the other gates. 4. The method for producing a skin-integrated injection molded product according to claim 3, wherein the injection molding is performed. 5. A method for producing a skin-integrated injection-molded product, wherein a skin material comprising a first and a second skin adjacent to each other is integrally provided on a surface of a hard resin core material obtained by injection-molding a melt-forming raw material, A first mold having a molding surface corresponding to the surface shape of the skin-integrated molded product, and a second mold having a molding surface corresponding to the back surface shape of the skin-integrated molded product and having a gate opened in the molding surface. Is prepared, and the first skin is set on the molding surface of the first mold of the molding die, and the second skin is covered with the molding surface of the second mold of the molding die. Then, the molten molding material is injected from the gate of the second mold in a state in which the mold is clamped, and the second skin is pushed toward the first skin by the injection pressure to form the first mold. Along the molding surface, the end adjacent to the skin is adjacent to the first skin. The surface of the first and second skins adjacent to each other is injection-molded by solidifying the melt-forming material by bringing the melt-forming material into close contact with the end back surface by the injection pressure of the melt-forming material. A method for producing a skin-integrated molded product, characterized by obtaining a skin-integrated injection-molded product integrally provided on a surface of a hard resin core material obtained in this way. 6. A plurality of gates are opened on a molding surface of a second mold, one of which is closed by a second skin, and the gate closed by the second skin. Injection of the molten molding material from the first gate is performed prior to the other gates, and the molten molding material injected with priority is over the first skin over the edge adjacent to the second skin.
6. The method according to claim 5, wherein the molten molding material is injected from another gate after flowing to the skin side.