JP2002283374A - Method for manufacturing composite molded object - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manufacture a composite molded product consisting of a base material part comprising a thermoplastic resin and a thermoplastic resin foamed sheet member, high in the mutual joining strength of the base material part and the foamed sheet member and excellent in appearance at a low cost. SOLUTION: The thermoplastic resin foamed sheet member is supplied to a part of the surface of the cavity between a pair of male and female molds and a molten thermoplastic resin is supplied and charged in the cavity from the cavity surface on which the sheet member is not present to form the thermoplastic resin base material part, and the end part of the thermoplastic resin foamed sheet member and the end part of the thermoplastic resin base material part are integrally joined.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a composite molded article in which a base material made of a thermoplastic resin and a base material made of a foamed thermoplastic resin sheet are joined at their edges.

[0002]

2. Description of the Related Art Molded articles made of thermoplastic resin are used in automobile interior parts, because of their economical efficiency, light weight and good shapeability.
It is widely used in interior and exterior parts of home appliances and other wide fields. Also, molded articles made of thermoplastic resin foam sheets are widely used mainly for automobile interior parts mainly because of their economical efficiency, light weight and good shapeability.

[0003] A molded article made of such a thermoplastic resin and a molded article made of a thermoplastic resin foam sheet are combined,
A composite molded product as shown in FIG. 1 in which the edges are joined to each other is conventionally a molded product made of a thermoplastic resin (6) by injection molding or press molding, or a thermoplastic resin foam sheet by vacuum molding or the like. Molded articles made of (7) were manufactured in advance, and then the edges of these molded articles were assembled together and joined by means such as heat staking.
(Fig. 2)

[0004] However, a composite molded article in which such a molded article made of a thermoplastic resin and a molded article made of a foamed thermoplastic resin sheet are separately manufactured, and the end portions are assembled and joined in a later step, is used in a process. In addition to the above, there is a problem that the position is displaced at the time of joining the two, and heat is applied to the surface at the time of heat staking to cause poor appearance of the product.

[0005]

SUMMARY OF THE INVENTION
The present inventors have developed a composite molded product comprising a base material portion made of a thermoplastic resin and a thermoplastic resin foam sheet member, in which the joining strength between both ends is strong, and the appearance of the composite molded product is also excellent. As a result of studying a manufacturing method at a low cost, the present invention has been reached.

[0006]

That is, according to the present invention, a thermoplastic resin foam sheet member is supplied to a part of a cavity surface between a pair of male and female molds, and then the cavity surface is removed from the cavity surface where the sheet member does not exist. Composite molding that supplies and fills a molten thermoplastic resin into a thermoplastic resin base to form a thermoplastic resin base, and joins and integrates the end of the thermoplastic resin foam sheet member with the end of the thermoplastic resin base A method for producing a body is provided.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. This description is an example of the present invention, and the present invention is not limited to this.

The composite molded article produced according to the present invention comprises a base material (6) made of a thermoplastic resin and a foamed thermoplastic resin sheet member (7), similarly to a conventionally known composite molded article. A molded article (1) having a typical shape is shown in FIG.
As shown in FIG. 1, the plan view seen from the surface side is the same as the conventional composite molded body as shown in FIG. 2, but in the composite molded body manufactured according to the present invention, it was cut along AA in FIG. As shown in FIG. 3 (a), the joint (F ′) between the base material (6) made of thermoplastic resin and the thermoplastic resin foam sheet member (7) is Ends of the sheet member (7) and the base material (6) made of a thermoplastic resin are integrally joined by thermal fusion. Alternatively, as shown in FIG. 3 (b), a thermoplastic resin foam sheet member (7) is formed at a joint (F portion) between a substrate (6) made of thermoplastic resin and a thermoplastic resin foam sheet member (7). Are integrally joined so that their ends are wrapped with the thermoplastic resin constituting the base material (6).

The joining surface may be all or a part of the edge of the thermoplastic resin foam sheet member (7) and the thermoplastic resin foam sheet member (7). There is no particular limitation as long as the two are joined to such an extent that there is no problem.

[0010] A skin material may be laminated on a part or all of the surface of the base material made of the thermoplastic resin of the composite molded article produced by the present invention. For example, FIG.
As shown in FIG. 4 (b), a plane viewed from the surface side of the composite molded product is shown by a cross section taken along line CC in FIG. 4 (a). As shown in FIG. 5 (a), FIG. 5 (a) shows a cross section taken along line DD in FIG. 5 (a). Alternatively, a skin material (8) may be laminated on a part of the surface of a substrate (6) made of a thermoplastic resin.

Also, a thermoplastic resin foam sheet member (7)
As shown in FIG. 6 (a), a skin material (8 ') is laminated on the surface of the thermoplastic resin foam sheet member as a cross section at the joint between the resin and the base material made of thermoplastic resin.
As shown in (b), a backing material (9) such as a reinforcing sheet may be laminated on the back surface of the thermoplastic resin foam sheet member.

Further, on the back surface of the thermoplastic resin foam base material, ribs for improving the product strength and projections such as bosses for assembling with other parts may be integrally provided. The ribs and bosses may have ribs (10) formed over the entire length of the back surface of the thermoplastic resin foam sheet member (7) as shown in FIG.
(B) thermoplastic resin foam sheet member (7)
The ribs (10) may be partially formed on the rear surface of the ribs, and the arrangement and shape of the ribs (10) are not particularly limited as shown in FIG. It is appropriately determined according to the purpose of use.

Of course, such ribs and bosses are not limited to the thermoplastic resin foam sheet member, but may be provided on the base material made of thermoplastic resin or on both of them.

Further, the composite molded article produced by the present invention has a state in which the base material (6) made of the thermoplastic resin and the end portions of the thermoplastic resin foam sheet member (7) as described in the above example are abutted against each other. 8 (a), a base material (6) made of a thermoplastic resin may be sandwiched between thermoplastic resin foam sheet members (7) as shown in FIG. As shown in FIG. 8 (b), the entire periphery of the thermoplastic resin foam sheet member (7) may be surrounded by a base material (6) made of a thermoplastic resin, or vice versa. The entire periphery of the base material (6) may be surrounded by a thermoplastic resin foam sheet member (7). The arrangement of the substrate (6) made of a thermoplastic resin and the thermoplastic resin foam sheet (7) is not particularly limited,
A base part made of a plurality of thermoplastic resins or a plurality of foamed thermoplastic resin sheet members may be appropriately combined.

Such a composite molded article is manufactured by the following method. FIG. 9 is a schematic sectional view of an example of a mold used in the method of the present invention. In this mold, the outer peripheral portion of the male mold (11) and the inner peripheral portion of the female mold (12) serve as sliding surfaces. The male mold surface has a fitting groove (14) for fitting a holding body (13) for holding the end of the thermoplastic resin foam sheet member. In addition, the molten resin supply port (16) is opened via the molten resin supply passage (15). This molten resin supply port may be provided at a location corresponding to the formation portion of the base material made of a thermoplastic resin, and the number and arrangement thereof may be determined according to the product shape and size.

Next, a method of manufacturing the composite molded article shown in FIG. 1 using such a mold will be described. FIG.
(A) is a plan view schematically showing an example in which the edge of a thermoplastic resin foam sheet member (17) is sandwiched by a sandwiching body (13a). The sandwiching of the thermoplastic resin foam sheet member (17) may be fixed so as not to cause displacement during molding. In this example, the thermoplastic resin foam sheet member (17) is sandwiched between the portion sandwiching the edge of the thermoplastic resin foam sheet member. This shows a state in which the missing portion is alternated. That is, G- in FIG.
As shown in FIG. 10 (b), the edge of the thermoplastic resin foam sheet member is firmly held by the holding body (13a) in the portion G, whereas the portion HH in FIG. As shown in FIG. 10C, the edge of the thermoplastic resin foam sheet member is not directly held by the holding body (13a). The portion not sandwiching the edge of the thermoplastic resin foam sheet member (17) shown in FIG.
At the time of molding, the molten thermoplastic resin enters, and when a composite molded article is formed after molding, the thermoplastic resin foam sheet member (1
The edge of 7) corresponds to a portion to be joined to the thermoplastic resin base material (6), and if this portion is increased, the thermoplastic resin base material (6) and the thermoplastic resin foam sheet member (17) However, there is a problem that the positioning property of the thermoplastic resin foam sheet member (17) is deteriorated. For this reason, it is preferable that the portion where the edge of the thermoplastic resin foam sheet member is firmly held by the holding body and the portion where the edge is not directly held are alternately and finely arranged.

At this time, the thermoplastic resin foam sheet member (17) sandwiched by the sandwiching body (13a) may be sandwiched by the sandwiching body (13a) as it is, but it is heated in advance and softened. It is preferable to pinch. Further, a product shaped in advance into a product shape may be sandwiched. The holding body (13) is detachable from the fitting groove (14), and the holding body is detached from the fitting groove to take out the holding body.
Generally, after the thermoplastic resin foam sheet member (17) is sandwiched between the sandwiching members as described above, it is generally fitted into the fitting groove while maintaining the sandwiched state.

FIG. 11 shows a thermoplastic resin foam sheet member (1).
7 shows a state in which the holding body (13a) holding the holding member (7) is fitted into the fitting groove (14) provided in the male mold (11).
At this time, a clamp frame (not shown) is provided on the outer periphery of the male mold (5).
Or the like may be provided to fix the outer peripheral portion of the thermoplastic resin foam sheet member. FIG. 12 shows a state where the molten thermoplastic resin (18) is supplied from the molten resin supply port (16) provided in the male mold at a portion where the thermoplastic resin foam sheet member (17) set between the molds does not exist. It shows the state where it is. The number and arrangement of the molten resin supply ports (16) are appropriately determined depending on the shape and size of the product. Further, the cavity clearance of the male and female molds when supplying the molten thermoplastic resin (18) is appropriately determined according to the appearance quality required for the product.

FIG. 13 shows a state in which the mold clamping has been completed. FIG. 13 (a) shows a portion where the thermoplastic resin foam sheet member (17) is sandwiched, and FIG. The figure shows a state in which the mold is clamped in a portion where the resin foam sheet member (17) is not sandwiched, and the molten thermoplastic resin enters the gap in the portion where the thermoplastic resin foam sheet member (17) is not sandwiched. Thus, the thermoplastic resin base material and the thermoplastic resin foam sheet member are firmly joined. The timing of the mold clamping may be either while supplying the molten thermoplastic resin (18) or after the supply is completed. When the mold clamping is performed after the supply of the molten thermoplastic resin (18) is completed, the mold clamping is preferably started immediately after the completion of the supply of the molten thermoplastic resin. Also, the mold clamping of the male and female molds is shown in the figure as an example in the vertical direction,
The mold clamping direction may be vertical or horizontal.
Thereafter, the mixture is cooled and solidified, and the male and female molds are opened to take out a composite molded article in which the thermoplastic resin foam sheet member is firmly joined to the thermoplastic resin base material.

In this method, the thermoplastic resin base material and the thermoplastic resin foam sheet member can be similarly integrated when the holding member (13b) shown in FIG. 14 is used as the thermoplastic resin foam sheet member. . When this holding member is used, the mold clamping is completed after the supply of the molten thermoplastic resin (see FIG. 1).
In 5), the molten thermoplastic resin enters around the edge of the portion (FIG. 15 (b)) where the thermoplastic resin foam sheet member (17) is not sandwiched, and the thermoplastic resin base material becomes the thermoplastic resin foam sheet. The thermoplastic resin base material and the thermoplastic resin foam sheet member are formed so as to surround the edge of the member, and are firmly joined.

FIG. 16 shows an example of manufacturing a composite molded article in which ribs are provided on the back side of a thermoplastic resin foam sheet member. The mold used at this time has, in addition to the above-described mold example, a concave portion (19) for forming a rib or a boss in a part of a portion of the male mold covered with the thermoplastic resin foam sheet member. Also, a molten resin supply passage is connected to this concave portion so that the molten thermoplastic resin can be supplied from the molten resin supply port (20). An opening / closing valve (not shown) is provided at the molten resin supply port, and a molten resin supply port (16) for supplying a molten thermoplastic resin to a portion serving as a base material portion and a molten thermoplastic resin at a rib or a boss portion. Molten resin supply port (2
0), it is preferable that the supply timing and supply time of the molten resin can be independently adjusted. FIG. 17 shows a thermoplastic resin foam sheet member in which a molten thermoplastic resin is supplied from a molten resin supply port (20) through a molten resin supply passage to a concave portion (19) for forming a rib or a boss provided in a male mold. (17) shows the rib (10) integrally formed on the back surface by heat fusion. The timing of supplying the molten thermoplastic resin for forming the ribs and the bosses is preferably performed after the closing of the male and female molds is completed.

Next, a method for producing a composite molded article in which a skin material is bonded and integrated on the surface of a thermoplastic resin substrate will be described. FIG. 18 (a) shows a holding member (13) in which the edges of the skin material (8) and the thermoplastic resin foam sheet member (17) are overlapped.
FIG. 4C is a plan view schematically showing an example of the pinching in c). Skin material (8) and thermoplastic resin foam sheet member (1
It is sufficient that the clamping of 7) is fixed so as not to cause displacement during molding. In this example, the skin material (8) and the edge of the thermoplastic resin foam sheet member (17) are overlapped and clamped. It shows a state in which the part and the part that is not sandwiched are alternated. That is, as shown in FIG. 18 (b), the portion II of FIG. 18 (a) is formed by holding the skin material (8) and the edge of the thermoplastic resin foam sheet member (17) together with the holding body (1).
3c).
As shown in FIG. 18 (c), the portion JJ of (a) is a skin material (8) and a thermoplastic resin foam sheet member (1).
The edges of 7) are not directly held by the holding body (13c). The portion not sandwiching the edges of the skin material (8) and the thermoplastic resin foam sheet member (17) shown in FIG. 18 (c) is around the edge of the thermoplastic resin foam sheet member (17) during molding. When the molten thermoplastic resin enters into the gaps, the edge of the thermoplastic resin foam sheet member (17) corresponds to the portion wrapped by the thermoplastic resin base material (6) when the composite molded article is formed after molding. If this portion is increased, the bonding strength between the thermoplastic resin base material (6) and the thermoplastic resin foam sheet member (17) increases, but the surface of the thermoplastic resin foam sheet member (17) has a thermal effect. There is a problem that a plastic resin enters or positioning property is deteriorated. For this reason, it is preferable that the portion where the edges of the skin material and the thermoplastic resin foam sheet member are firmly sandwiched by the sandwiching body and the portion that is not directly sandwiched are alternately and finely arranged. .

At this time, the thermoplastic resin foam sheet member (17) sandwiched by the sandwiching body (13c) may be sandwiched as it is by the sandwiching body (13c). It is preferable to pinch. Further, a product shaped in advance into a product shape may be sandwiched. As for the skin material (8), the skin material (8) may be sandwiched as it is, may be sandwiched in a pre-heated state, or may be sandwiched in a state of being shaped into a product in advance.

FIG. 19 shows a holding groove (1c) provided in a male mold (11) with a holding body (13c) in which the edges of a skin material (8) and a thermoplastic resin foam sheet member (17) are overlapped and held.
4) shows the state of fitting. At this time, the male type (1
A clamp frame (not shown) or the like may be provided on the outer peripheral portion of 1) to fix the outer peripheral portion of the skin material and / or the thermoplastic resin foam sheet member. FIG. 20 shows a state where the molten thermoplastic resin is supplied from the molten resin supply port (16) between the skin material set between the molds and the male mold through the molten resin supply passage in the male mold. I have. This molten resin supply port (16)
Although the number and arrangement of are determined appropriately according to the shape and size of the product, when the skin material is bonded and integrated only to a part of the surface of the thermoplastic resin substrate, the skin material is arranged at least in a place where the skin material exists. It is necessary to. The cavity clearance of the male and female molds when supplying the molten thermoplastic resin (18) is appropriately determined depending on the type of the skin material used.

FIG. 21 shows a state where the mold clamping is completed. FIG. 21 (a) shows a portion where the edge of the skin material (8) and the edge of the thermoplastic resin foam sheet member (17) are sandwiched. FIG. 21 (b) shows a state in which the skin material (8) and the thermoplastic resin foam sheet member (17) are clamped at a portion where the edge is not sandwiched, and the skin material (8) and the heat In a portion where the edge of the thermoplastic resin foam sheet member (17) is not sandwiched, a thermoplastic resin base material is formed so as to wrap around the skin material (8) and the edge of the thermoplastic resin foam sheet member (17). The thermoplastic resin base material and the thermoplastic resin foam sheet member are firmly joined. The timing of the mold clamping may be either while supplying the molten thermoplastic resin (18) or after the supply is completed. When the mold clamping is performed after the supply of the molten thermoplastic resin (18) is completed, the mold clamping is preferably started immediately after the completion of the supply of the molten thermoplastic resin. Thereafter, cooling and solidification were performed, and by opening both the male and female molds, the skin material was bonded and integrated on the surface of the thermoplastic resin base material, and the thermoplastic resin foam sheet member was firmly joined. The composite article is removed.

The thermoplastic resin applied to the thermoplastic resin substrate of the present invention is a resin usually used in compression molding, injection molding, extrusion molding and the like, and is, for example, polypropylene, polyethylene, acrylonitrile styrene- General thermoplastic resin such as butadiene block copolymer, polyamide such as polystyrene and nylon, polyvinyl chloride, polycarbonate, acrylic resin, styrene butadiene block copolymer, EPM and EPDM
And the like, a mixture thereof, and a polymer alloy using the same. These may be foamable or non-foamable. In addition, these thermoplastic resins may contain fillers such as commonly used glass fibers and various inorganic or organic fillers, if necessary.Of course, various pigments and lubricants that are commonly used, Various additives such as an antistatic agent and a stabilizer may be blended.

Examples of the skin material applicable to the present invention include fabrics and knits such as moquettes and tricots, nonwoven fabrics such as needle punched carpets, and sheets or films of metal foil, thermoplastic resin and thermoplastic elastomer. These skin materials may be two or three or more laminated skin materials in which a foam layer and a backing layer are appropriately laminated as necessary, but may be heat-fusible with a thermoplastic resin,
Alternatively, it is necessary that the back surface of the skin material is impregnated with a thermoplastic resin in a molten state and can be bonded to the base resin portion. In this case, the foamed layer may be a polyolefin foam such as polypropylene or polyethylene, a polyvinyl chloride foam, a soft or semi-rigid polyurethane foam, or the like.The backing layer may be a nonwoven fabric or a synthetic resin sheet or film. And the like. Natural fibers such as cotton, wool, silk and hemp or synthetic fibers such as polyamide, polyester and nylon can be used as the fibers constituting the nonwoven fabric.
These can be used alone or as a blend to form a nonwoven fabric by various methods. For example, needle punch type,
Thermal bond type, spun bond type, melt blow type,
Non-woven fabrics such as spunlace type are exemplified. Examples of the sheet or film made of a synthetic resin include thermoplastic resin such as polypropylene and polyethylene and sheets and films of a polyolefin-based thermoplastic elastomer, and those having a fusibility with the thermoplastic resin used as the base resin. Used.

As the thermoplastic resin applied as the thermoplastic resin foam sheet member of the present invention, the same thermoplastic resins as those exemplified as the thermoplastic resin substrate can be applied.
The same type of thermoplastic resin as the thermoplastic resin substrate that can be fused to each other is particularly preferably applicable.

The expansion ratio and thickness of the thermoplastic resin foam sheet member are not particularly limited, but the expansion ratio is about 2 to 10 times and the thickness is 1 to 1 in consideration of the balance between the weight and strength of the product.
About 0 mm can be preferably applied. Further, in the thermoplastic resin foam sheet member, a skin material such as a nonwoven fabric may be laminated on the surface in advance, or a sheet of a thermoplastic resin or a thermoplastic elastomer for reinforcement may be laminated on the back surface. Good.

As a molding method applied to the composite molded article of the present invention, when a skin material is bonded and integrated, compression molding which can reduce damage to the skin material can be preferably applied, as shown in FIG. After the thermoplastic resin foam sheet member is set in the mold as described above, the male and female molds are closed as shown in FIG. 22, and then the molten thermoplastic resin is supplied to shape the molded article.

[0031]

According to the method of the present invention, even when the thermoplastic resin base material and the thermoplastic resin foam sheet member are integrally joined, the joining strength between the two ends is high and the position is high. A composite molded article having good appearance without any displacement can be efficiently and inexpensively manufactured.

[Brief description of the drawings]

FIG. 1 is a plan view showing an example of a composite molded product of the present invention.

FIG. 2 is a cross-sectional view of a composite molded product according to the prior art.

FIG. 3 shows an example of an AA sectional view of the composite molded article shown in FIG.

4A and 4B show an example of a composite molded product of the present invention, wherein FIG. 4A is a plan view and FIG. 4B is a cross-sectional view taken along line CC of FIG.

FIGS. 5A and 5B show an example of a composite molded product of the present invention, wherein FIG. 5A is a plan view and FIG. 5B is a sectional view taken along line DD of FIG.

FIG. 6 shows an example of a cross-sectional view taken along the line AA of the composite molded article shown in FIG.

7 shows an example of a cross section of the composite molded article shown in FIG. 1, wherein (a) and (b) are AA cross sectional views,
(C) shows a BB cross-sectional view.

FIG. 8 is a plan view showing an example of the composite molded product of the present invention.

FIG. 9 is a schematic sectional view showing an example of a mold used in the method of the present invention.

10A and 10B are schematic diagrams illustrating a holding body that holds an edge of a thermoplastic resin foam sheet member, wherein FIG. 10A is a state of the holding member viewed from above, and FIG. 10B is a GG of FIG. (C) shows a cross-sectional state when cut along HH.

FIG. 11 is a cross-sectional view of a mold during supply of a thermoplastic resin foam sheet member in a manufacturing process according to the method of the present invention.

FIG. 12 is a cross-sectional view of a mold during supply of a molten thermoplastic resin in a manufacturing process according to the method of the present invention.

FIG. 13 is a cross-sectional view of a mold after clamping in a manufacturing process according to the method of the present invention. FIG. 13 (a) shows a portion sandwiching a thermoplastic resin foam sheet member.
(B) shows a portion where the thermoplastic resin foam sheet member is not sandwiched.

14A and 14B are schematic views showing a holding body that holds an edge of a thermoplastic resin foam sheet member, wherein FIG. 14A is a view of the holding body viewed from above, and FIG. (C) shows a cross-sectional state when cut along G'-H '.

FIG. 15 is a cross-sectional view of a mold after clamping in a manufacturing process according to the method of the present invention, in which (a) shows a portion sandwiching a thermoplastic resin foam sheet member;
(B) shows a portion where the thermoplastic resin foam sheet member is not sandwiched.

FIG. 16 is a sectional view of a mold after clamping in a manufacturing process according to the method of the present invention, showing a portion where a thermoplastic resin foam sheet member is not sandwiched.

FIG. 17 is a cross-sectional view of a mold after a mold is clamped in a manufacturing process according to the method of the present invention, in which a molten thermoplastic resin is supplied to a rib portion.

18A and 18B are schematic views showing a sandwiching body which sandwiches the edges of a skin material and a thermoplastic resin foam sheet member, wherein FIG. 18A shows a state where the edge is viewed from above, and FIG. The cross-sectional state when cut along II is shown, and (c) shows the cross-sectional state when cut along JJ.

FIG. 19 is a cross-sectional view of a mold when a skin material and a thermoplastic resin foam sheet member are supplied in a manufacturing process according to the method of the present invention.

FIG. 20 is a sectional view of a mold during supply of a molten thermoplastic resin in a manufacturing process according to the method of the present invention.

FIG. 21 is a cross-sectional view of a mold after clamping in a manufacturing process according to the method of the present invention. FIG. 21 (a) shows a portion sandwiching a skin material and a thermoplastic resin foam sheet member.
(B) shows a portion where the skin material and the thermoplastic resin foam sheet member are not sandwiched.

FIG. 22 is a sectional view of a mold after a mold is clamped in a manufacturing process according to the method of the present invention.

[Explanation of symbols]

 1: Composite molded article 2: Composite molded article 3: Composite molded article 4: Composite molded article 5: Composite molded article 6: Thermoplastic resin base material 7: Thermoplastic resin foam sheet member 8, 8 ': Skin material 9: Backing Material 10: Rib or boss 11: Male type 12: Female type 13: Clamp body 14: Fitting groove 15: Molten resin supply passage 16: Molten resin supply port 17: Thermoplastic resin foam sheet member 18: Molten thermoplastic resin 19: recess 20: molten resin supply port

Claims (7)

[Claims] 1. After a thermoplastic resin foam sheet member is supplied to a part of a cavity surface between a pair of male and female molds,
A molten thermoplastic resin is supplied and filled into the cavity from the cavity surface where the sheet member does not exist to form a thermoplastic resin base portion, and the end portion of the thermoplastic foam sheet member and the thermoplastic resin base portion A method for producing a composite molded article, comprising joining and integrating an end of the composite molded article. 2. A skin material is supplied to a part or all of a cavity surface of a pair of male and female dies which does not have a thermoplastic resin foam sheet member, and then the skin material and one of the dies are provided. 2. The composite molding according to claim 1, wherein a molten thermoplastic resin is supplied and filled into a cavity between the molding resin and a molding material, and a skin material is bonded and integrated to at least a part of the surface of the thermoplastic resin base. How to make the body. 3. The method for producing a composite molded article according to claim 1, wherein a molten thermoplastic resin is supplied between the unclosed molds and filled into the cavity by mold clamping. 4. An end portion of a thermoplastic resin foam sheet member is sandwiched between clamping members, and the clamping member is fitted into a fitting groove provided in a mold to form the thermoplastic resin foam sheet member into a mold. The method for producing a composite molded article according to claim 1, wherein the composite molded article is fixed to a molding surface. 5. The skin material is overlapped with the edges of the foamed thermoplastic resin sheet member and sandwiched by a sandwiching body, and the sandwiched body is fitted into a fitting groove provided in a mold to cover the skin material. The method for producing a composite molded article according to claim 2, wherein the thermoplastic resin foam sheet member is fixed to a mold. 6. A protrusion formed by using a mold provided with a recess in a mold corresponding to the back side of a thermoplastic resin foam sheet member and supplying the molten thermoplastic resin to the recess. The method according to any one of claims 1 to 5, wherein the portion and the thermoplastic resin foam sheet member are integrated by fusion. 7. The method for producing a composite molded article according to claim 1, wherein a thermoplastic resin foam sheet member in a softened state is supplied by heating between a pair of male and female molds.