JPH08174577A - Plastic molded article with pad and manufacture thereof - Google Patents

Abstract

PURPOSE: To obtain a plastic molded article with a pad which makes it unnecessary to trim the edge of a skin by post-processing and wherein the external appearance of a joining part of the pad and a core, which is to be a visible part, is excellent. CONSTITUTION: A core 11 has a pad setting face 12, a side wall 13 formed at a position corresponding to a visible part 31 at the peripheral edge of the pad setting face 12 and a non-visible part side end part 15 formed at a position corresponding to a non-visible part 32 at the peripheral edge of the pad setting face 12, while a skin 22 of a pad 21 has an end part 25 for overlap on the non-visible part side of a lateral side part 23. The end part for overlap covers the pad setting face 12 so that it overlap the non-visible part side end part, and a foamed body 27 of the pad is foam-molded between the skin 22 and the pad setting face 12 so that a lateral side part 23a of the skin is held between the foamed body and the side wall 13 of the core.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic molded product with a pad having a pad at a predetermined portion of a core and a method for manufacturing the same, and particularly to a mating portion between the pad and the core.
The present invention relates to a padded plastic molded product having a visible portion that can be seen from the outside even after being attached to a counterpart and a non-visible portion that is hidden by the counterpart after attachment, and a method for manufacturing the same.

[0002]

2. Description of the Related Art A plastic molded product with a pad having a pad having a skin adhered to the surface of a foam on the surface of the core is used in various fields such as interior parts of automobiles or furniture. For example, in an automobile instrument panel, as shown in FIG. 14, a pad 83 is partially provided on the surface of a core 81, or a pad is provided on the entire surface of the core, as shown in FIG. Are used.

As the above-mentioned pad-formed plastic molded article, one conventionally known is manufactured as follows. That is, a skin having a peripheral portion called a skirt portion on the outer periphery of the product portion is arranged on one die surface of the split mold so that the skirt portion is located on the outer periphery of the cavity, and the other die surface has a core. Is used to sandwich the skirt portion of the skin between mold surfaces, and in that state, the liquid foaming raw material is foamed between the skin and the core, and then the skirt portion of the skin is cut off. In addition, a part of the skirt portion of the skin may be brought into contact with the edge of the core and sandwiched between the mold surfaces via the edge of the core.

However, in the case of the above-mentioned manufacturing method, the liquid foaming raw material is likely to leak out from the edge of the product portion of the epidermis to cause burrs, and the skirt portion of the epidermis must be subsequently cut (trimmed). Therefore, there is a problem that it takes time for the subsequent process. In addition, in order to prevent the liquid foaming raw material from leaking out, an elastic sealing material may be attached to the edge surface of the core in contact with the skirt portion, but in that case, a troublesome elastic sealing material attaching work is required. There is. Further, in the plastic molded product with a pad obtained by the manufacturing method, the edge of the skin is only adhered to the foam due to the self-adhesiveness of the foam during the foam molding, and shrinkage due to deterioration of the skin or the like occurs. There was a risk that the edges of the epidermis would separate from the foam.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points and provides a plastic molded product with a pad, which does not require trimming of the edge of the epidermis by post-processing and has a good appearance, and a method for manufacturing the same. It is the one we are trying to provide.

[0006]

The invention of a plastic molded product with a pad has a pad in which a foam is covered with a skin on the surface of a core, and is attached to a mating object at the mating portion of the pad and the core. In a plastic molded product with a pad, which has a visible portion that is exposed even afterward and a non-visible portion that is hidden by the attachment, the core is a sidewall on which a pad mounting surface and a peripheral portion of the pad mounting surface corresponding to the visible portion are formed. And a non-visible portion side end portion formed at a position corresponding to the non-visible portion on the peripheral edge of the pad installation surface, while the skin of the pad has a side surface portion at an edge and a side surface portion of the side surface portion. It has a polymerization end on the non-visible part side, and covers the pad installation surface so that the polymerization end part and the non-visible part side end part of the core overlap, and the foam of the pad is the skin. Fill the space between the pads While bonding with the skin and the pad installation surface, characterized in that it is sandwiched between the skin side surface of the sidewall of the core.

Further, the invention of a method for producing a plastic molded article with a pad has a pad in which a foam is covered with a skin on the surface of the core, and at the joining portion between the pad and the core,
In a method of manufacturing a plastic molded product with a pad, which has a visible portion that is exposed even after being attached to an opponent and a non-visible portion that is hidden by the attachment, the pad mounting surface and the visible portion on the periphery of the pad mounting surface are corresponded. A core having a side wall formed at a position and an end portion of the peripheral portion of the pad mounting surface corresponding to the non-visible portion side end portion,
The pad mounting surface is arranged on one mold surface of the split mold so that the pad mounting surface faces the other mold surface, and on the other hand, the side surface part formed on the edge and the non-visible part side of the side surface part are formed. The skin having a polymerization end, the visible side surface of the skin is substantially in contact with the side wall of the core, and the polymerization end is opposed to the non-visible side end of the core. Place it on the mold surface,
A foam produced by sandwiching the polymerization end of the skin and the non-visible side end of the core between the mold surfaces of the molding die and foaming a liquid foaming raw material between the skin and the pad mounting surface. Is integrated with the skin and the core.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings. 1 is a cross-sectional view of an embodiment of a plastic molded product with a pad according to the present invention, FIG. 2 is an enlarged cross-sectional view near the side wall of the core and the pad, which is the visible part, and FIG. 3 is also a non-visible part. It is an expanded sectional view of the side.

FIG. 4 is a sectional view of a molding die showing an embodiment of a method for producing a plastic molded product with a pad according to the present invention, and FIG. 5 is an enlarged view of a part of the molding die during foaming in the embodiment. FIG. 6 is a cross-sectional view showing the other part of the mold in the same embodiment in an enlarged manner, and FIG. 7 is a cross-sectional view showing a part of the mold in which the liquid foaming raw material is filled between the skin and the core.
FIG. 8 is a sectional view showing the other part of the forming die. Further, FIG. 9 is a partial sectional view of a molding die showing another embodiment of the manufacturing method of the present invention, FIG. 10 is a sectional view showing a part of a molding die of still another embodiment, and FIG. Sectional view showing the part,
FIG. 12 is a partial sectional view of a molding die showing still another embodiment,
FIG. 13 is a cross-sectional view showing another part of the molding die of the same embodiment.

A plastic molded product with a pad 10 according to an embodiment of the present invention shown in FIGS. 1 to 3 is used as an instrument panel of an automobile, and has a core 11
The pad 21 and the core 1 are provided with a pad 21 in a part thereof, and a visible portion 31 which is exposed even after being attached to the vehicle body and can be seen from the outside, and an invisible portion 32 which is hidden by the attachment.
It is included in the joint portion A with 1. The visible portion corresponds to 88, 89 in the instrument panel shown in FIG. 14, for example, and the non-visible portion is both ends 90, 90 of the instrument panel hidden by the side inner surface of the front part of the vehicle body or the glove box. This corresponds to the passenger seat side end portion 91 hidden by. In the following description, an instrument panel will be described as an example, but the molded product and manufacturing method of the present invention are not limited to the instrument panel, and can be applied to various molded products depending on the application.

The core 11 is made of a hard plastic such as ABS resin (acrylonitrile-butadiene-styrene resin), polypropylene or the like, or a plastic having a high shape-retaining property such as a fiber reinforced plastic. It is 12. The pad mounting surface 12 is provided in a portion where the pad 21 is arranged, with a size, a shape and the like according to a design of the molded product, an application and the like.

A side wall 13 is formed on a part of the periphery of the pad mounting surface 12. The side wall 13 is provided at a position corresponding to the visible portion 31 of the mating portion A. The side surface of the pad 21 is in close contact with the side wall 13 and the mating portion A
A gap is not formed in the visible portion 31 of.

Further, in this embodiment, the peripheral edge of the pad mounting surface 12 corresponding to the non-visible portion 32 of the mating portion A is bent toward the side opposite to the pad 21 to form the non-visible portion side end portion 15. ing. The non-visible portion side end portion 15 of the core may be formed as a substantially extended surface of the pad mounting surface 12 depending on the shape of the foamed molded product and the like. Reference numeral 16 is an injection hole for the liquid foaming raw material.

On the other hand, the pad 21 comprises a skin 22 and a foam 27. The skin 22 is made of plastic leather or the like formed by slush molding or the like, has a side surface portion 23 formed at the time of molding, and covers the pad mounting surface 12 so as to cover it. The epidermal side surface portion 23 includes the epidermal side surface portion 23 on the visible portion 31 side.
a and the skin side surface portion 23b on the non-visible portion 32 side are present, and the superimposing end portion 25 extends from the end of the non-visible portion 32 side skin side surface portion 23b. The polymerizing end portion 25 is formed on the side of the invisible portion 32 when the foam 27 is molded.
1 for preventing the liquid foaming raw material from leaking from between the skin 1 and the skin 22, and the shape of the skin 22 or the foam 27
Depending on the molding conditions, etc., the length from the end of the skin side surface portion 23b to the tip of the superimposing end portion 25 is set to an appropriate length.

The foam 27 is made of polyurethane resin or the like foamed between the outer skin 22 and the pad mounting surface 12, and fills the space between the outer skin 22 and the pad mounting surface 12 to cover the outer skin 22 and the pad mounting surface 12. Adhesion is performed, and the side surface portion 23 a of the skin is sandwiched between the side wall 13 of the pad mounting surface 12.

The skin side surface 23a is sandwiched between the skin 22 and the core 11 by the volume increase of the foam (liquid foaming raw material) and the pressure of the foaming gas at the time of molding the foam 27 between the skin 22 and the core 11. Pressed against the side wall 13,
This is done by hardening the foam 27 in that state.
Therefore, since the mating portion between the skin side surface portion 23a on the visible portion 31 side and the side wall 13 of the core 11 is in close contact with each other and no gap is formed in the mating portion, the appearance is not deteriorated.

Further, in this embodiment, an inwardly projecting groove 24 which is recessed inward is formed in the skin side surface portion 23a sandwiched between the side wall 13 of the core 11 and the foam 27.
Due to the inwardly projecting groove 24, the foam body 27 and the skin side surface portion 23a are engaged with each other, and the skin side surface portion 23a is securely fixed to the foam body 27 by the synergistic effect of the adhesion. Therefore, even if the skin 22 contracts due to deterioration or the like, there is no possibility that the skin side surface portion 23 a will be separated from the foam 27.

Further, the inwardly projecting concave groove 24 of the outer skin side surface portion 23a enhances the rigidity of the outer skin side surface portion 23a at the time of manufacturing the plastic molded product 10 with the pad, and unnecessary corrugation or the like on the outer skin side surface portion 23a. To prevent the side surface 23 of the epidermis
There is an effect of preventing a defective seal between a and the side wall 13 of the pad mounting surface. In addition, when the foamed body intrudes between the skin side surface portion 23a and the side wall 13 of the pad mounting surface at the time of manufacturing the padded plastic molded product 10, the invading foamed body is housed in the inwardly projecting concave groove 24. Then, it also has an action of preventing leakage to the surface of the epidermis 22. Reference numeral 26 is an outwardly projecting groove formed in the superimposing end portion 25 of the surface skin, which increases the rigidity of the superimposing end portion 25.

The plastic molded product 10 with a pad thus formed is attached to an object, which is a vehicle body in this embodiment. At that time, in the visible portion 31, the skin side surface portion 23a
Is sandwiched between the foam 27 and the side wall 13 and there is no gap, so that the appearance is good. On the other hand, the non-visible portion 32 is hidden by the counterpart article 35 as shown in FIG. 3, which is a glove box, instrument panel, etc. in this embodiment, so that the superimposing end portion 25 of the skin 22 is longer than necessary or the skin 22 Even if there is a gap between the overlapping end portion 25 and the non-visible portion side end portion 15 of the core 11, the appearance is not spoiled.
Therefore, according to the plastic molded product with a pad 10 having this structure, it is not necessary to trim the outer skin end of the visible portion 31 and the outer skin end of the invisible portion 32 after cutting the foam 27 by trimming.

Next, an embodiment of the manufacturing method of the present invention will be described. FIG. 4 is a sectional view of a forming die showing an embodiment of the manufacturing method, FIG. 5 is a partially enlarged sectional view of the forming die showing the middle of foaming, and FIG. 6 is an enlarged sectional view of another portion of the forming die during the same foaming. FIG. 7 is a partial cross-sectional view of the molding die filled with the liquid foaming raw material, and FIG. 8 is a cross-sectional view of another portion of the molding die.

The molding die 40 shown in FIGS. 4 to 8 is composed of split dies 41 and 43, and has a cavity 4 for molding therein.
4 A nozzle hole 42 for inserting the injection nozzle N of the foam molding apparatus is formed in one of the split molds 41. The core 11 is arranged on the mold surface of the one split mold 41 by using a clip or the like provided on the mold surface. At this time, the pad mounting surface 12 of the core 11 is made to face the other split mold 43 side. In addition, on the mold surface of the other split mold 43 facing the pad mounting surface 12, the skin 22 has a side surface 23 with the side surface 23 facing the pad mounting surface 12, and a skin side surface portion having the inwardly projecting concave groove 24. 23a is on the side of the side wall 13 of the pad mounting surface, and the superimposing end portion 25 is arranged to face the non-visible portion side end portion 15 of the core 11.

As will be better understood from FIG. 6, an elastic material 45 such as urethane elastomer is embedded in the mold surface of the split mold 43 in which the superimposing end portion 25 of the skin is arranged. 45 in the recess 46 on the surface, the end 2 for polymerization
The outwardly projecting concave groove 26 of 5 is fitted and held.

Then, the split molds 41 and 43 are closed. With this closed mold, the skin 22 covers the pad mounting surface 12 so as to cover the pad mounting surface 12, and the visible side skin surface side portion 23a having the inwardly projecting groove 24 is substantially in contact with the side wall 13 of the pad mounting surface 12. become. When the mold is closed and the skin 22 is arranged, the skin side surface portion 23a has high rigidity due to the inwardly projecting concave groove 24, so that an irregular gap due to corrugation or the like does not occur between the skin and the side wall 13. Further, by the closed mold, the superimposing end portion 25 of the skin 22 overlaps the non-visible portion side end portion 15 of the core 11, and is sandwiched and sealed between the mold surfaces of the split molds 41 and 43.

Next, a liquid foaming raw material P such as a polyurethane raw material is injected from the injection nozzle N inserted into the nozzle hole 42 of the split mold 41 through the injection hole 16 of the core 11 to the pad mounting surface 12 and the skin 22 of the core. Injected in between. The injected liquid foaming raw material P fills the space between the pad mounting surface 12 and the skin 22 while forming a foam by a foaming reaction. And
When the foam (liquid foaming raw material P) reaches the visible skin side 23a on the visible side as shown by the chain line in FIG.
3a is pressed to the side wall 13 side of the pad mounting surface 12 and pressure-bonded to the side wall 13 to seal between the side wall 13 and the skin side surface portion 23a. At that time, the skin side surface portion 23a is formed by the inwardly projecting groove 2
4, the waviness and the like are reduced, so that the side wall 13 can be surely adhered. The seal prevents the foam from leaking from between the skin side surface portion 23a and the side wall 13, and the visible portion 31 having a good appearance is obtained. Further, as shown in FIG. 7, even if the foam 27 may invade between the skin side surface portion 23a and the side wall 13, the invading foam body 27a is accommodated in the inwardly projecting concave groove 24 of the skin side surface portion 23a, It is prevented from being exposed from between the skin side surface portion 23a and the side wall 13.

On the other hand, at the joining portion of the non-visible portion 32, the superimposing end portion 25 of the skin 22 and the non-visible portion side end portion 15 of the core 11 are formed.
Is sandwiched between the mold surfaces of the split molds 41 and 43 and sealed, so that leakage of the foam can be prevented. Moreover, as shown in FIG. 8, even when the foam 27 enters between the superimposing end portion 25 of the skin 22 and the non-visible side end portion 15 of the core 11, the invading foam member 27 b will be replaced by the superimposing end portion 25. Since it is housed in the outwardly projecting concave groove 26 formed in, the leakage of the foam is prevented. Even if the foam leaks to some extent on the non-visible portion side and forms burrs or the like, since the non-visible portion is hidden after the plastic molded product with the pad is attached, there is no problem in appearance. . Therefore, according to this manufacturing method, it is not necessary to attach a sealing material for preventing foam leakage to the outer skin 22 or the core 11, and the manufacturing work is facilitated.

The self-adhesiveness of the foam (liquid foaming raw material) generated during the foaming causes the foam 27 and the surface skin 22 to adhere to each other to form a pad, and the foam 27 serves as the pad mounting surface 12 of the core 11. To glue. After that, if the molding die is opened and the molded product is taken out, the desired plastic molded product with pad 10 shown in FIG. 1 is obtained.

The molded product 10 thus obtained has a very good appearance, with no leakage of foam and no gap at the joint between the core 11 and the pad 21 of the visible part 31 as described above.
Moreover, the skin side surface portion 23a on the visible portion 31 side is the foam 27.
Since it is firmly fixed to the outer skin side surface portion 23a, there is no fear of peeling. Further, the overlapping end portion 2 on the non-visible portion 32 side
No. 5 does not need to be cut even if it is too long, and no extra trimming work is necessary because it is hidden by the mating object after the plastic molded product with a pad is attached.

As shown in FIG. 9, a gas vent hole 28 is formed in the outwardly projecting groove 26 of the superposing end portion 25 of the outer skin 22.
May be provided in an appropriate shape such as a circle and at an appropriate interval. Then, excess foaming gas generated from the foaming raw material and easily accumulated between the skin 22 and the core 11 efficiently escapes from the gas vent holes 28 through the parting surfaces 47 of the split dies 41 and 43 to prevent voids and the like. It is possible to form a good foam 27 that is not present.

FIG. 10 shows another manufacturing method. Hereinafter, the same members as those in the above-described embodiment will be denoted by the same reference numerals.
In this embodiment, a through hole 54 that communicates the inside and the outside is formed in the side wall 53 of the core 51 that faces the inwardly projecting groove 24 of the side surface 23a of the skin 22. Therefore, even if a large amount of foam penetrates between the skin side surface portion 23a and the side wall 53, the penetrating foam 27a flows out of the core side wall 53 through the through hole 54 of the side wall 53, so that the skin 22 It is possible to reliably prevent the leakage to the surface of the visible part side. Moreover, the surplus foaming gas between the skin 22 and the core 51 can be efficiently escaped from the through hole 54 to the outside, and the generation of voids or the like in the foam 27 can be prevented.

Further, as shown in FIG. 11, a through hole 56 for communicating the inside and the outside is also formed at the end 55 on the non-visible portion side of the core 51 at a position opposed to the outwardly projecting groove 26 of the overlapping end 25. May be formed. Then, the foam 27b that has entered between the outwardly projecting concave groove 26 and the invisible portion side end 55, and the surplus foaming gas between the skin 22 and the core 51 of the foam 27b is invisible from the through hole 56 of the core. Since it flows out to the back surface of the side end 55, a good molded product can be obtained.

Still another embodiment shown in FIG. 12 is a core 6
The side wall 63 of No. 1 is formed with a groove 64 facing the inwardly protruding groove 24 of the side surface 23a of the skin 22. Therefore, even if the amount of the foam 27a that penetrates between the visible skin side surface portion 23a and the side wall 63 is large, a large space formed between the inwardly projecting concave groove 24 and the concave groove 64 facing the concave groove 24. Further, the invading foam body 27a can be accommodated, and there is no fear that the invading foam body 27a leaks to the surface of the skin 22 on the visible side.

Further, in the groove 64 of the side wall 63, the side wall 6
If the through-hole 65 communicating between the inside and the outside of 3 is provided, the intruding foam 27a flows out of the side wall 63 of the core through the through-hole 65 even if the amount of the invading foam 27a increases. 22 It is possible to prevent the foam from leaking to the surface.
In that case, the excess foaming gas between the skin 22 and the core 61 can also escape to the outside through the through hole 65.

Further, as shown in FIG. 13, at the end portion 65 on the non-visible portion side of the core 61, the superimposing end portion 25 of the skin is also formed.
The concave groove 67 facing the outwardly protruding concave groove 26 may be provided, or the through hole 66 that communicates the inside and the outside may be formed in the concave groove 67. Then, the same action and effect as the through hole 65 of the side wall 63 can be obtained.

In each of the above embodiments, the case where the pad is provided on a part of the core has been shown. However, the plastic molded product with a pad and the manufacturing method thereof according to the present invention are applicable to the case where the pad is provided on the entire one side of the core. Also applies. In that case, the sidewalls of the core are formed at the edges of the core. Moreover, the injection of the liquid foaming raw material may be an open injection performed by opening a split mold.

[0035]

As shown and described above, in the plastic molded product with a pad of the present invention, the side surface of the skin is closely adhered to the side wall of the core at the joint between the pad and the core, which is the visible part. , The appearance is good. Further, the visible side is not exposed because the side surface of the skin is sandwiched between the side wall of the core and the foam, and on the other hand, the non-visible side has a superimposing end of the superficial skin that overlaps the end of the non-visible side of the core. , It can be used without trimming the edge of the skin because it is not exposed by being hidden by the opponent after the plastic molded product with a pad is attached.

Further, according to the manufacturing method of the present invention, as described above, the visible portion of the joint between the pad and the core has a good appearance, and the padded plastic molded product does not require the trimming operation of the skin in the subsequent step. Can be easily manufactured without attaching a sealing material to the core or the like.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of a plastic molded product with a pad according to the present invention.

FIG. 2 is an enlarged cross-sectional view in the vicinity of a mating portion between a side wall of a pad mounting surface on the visible side and a pad.

FIG. 3 is an enlarged cross-sectional view of the non-visible portion side.

FIG. 4 is a cross-sectional view of a molding die showing an embodiment of a method for manufacturing a plastic molded product with a pad according to the present invention.

FIG. 5 is an enlarged cross-sectional view showing a part of a mold during foaming in the same example.

FIG. 6 is an enlarged cross-sectional view showing another portion of the molding die in the embodiment.

FIG. 7 is a cross-sectional view showing a part of a molding die in which a liquid foaming raw material is filled between a skin and a core.

FIG. 8 is a cross-sectional view showing another part of the molding die.

FIG. 9 is a partial cross-sectional view of a molding die showing another embodiment of the manufacturing method of the present invention.

FIG. 10 is a cross-sectional view showing a part of a molding die according to still another embodiment.

FIG. 11 is a cross-sectional view showing another part of the molding die.

FIG. 12 is a partial cross-sectional view of a molding die showing still another embodiment.

FIG. 13 is a cross-sectional view showing another portion of the molding die of the same example.

FIG. 14 is a perspective view of a general plastic molded product with a pad for an instrument panel.

[Explanation of symbols]

 11: core 12: pad installation surface 13: side wall 15: non-visible part side end 21: pad 22: skin 23: side part 23a: visible part side skin side part 23b: non-visible part side skin side part 24: inward Protruding groove 25: End portion for polymerization 26: Outer protruding groove 27 Foam 31: Visible part 32: Invisible part 41, 43: Split type

Claims (7)

[Claims] 1. A pad having a foam covered with a skin is provided on a surface of a core, and a visible portion which is exposed even after being attached to an object and a non-visible portion which is hidden by the attachment at a mating portion of the pad and the core. In a plastic molded product with a pad having a portion, the core has a pad mounting surface, a side wall formed at a position corresponding to the visible portion on the peripheral edge of the pad mounting surface, and the non-visible portion on the peripheral edge of the pad mounting surface. And a non-visible portion side end portion formed at a corresponding position, while the epidermis of the pad has a side surface portion at an edge and a superimposing end portion on the non-visible portion side of the side surface portion. Covering the pad mounting surface such that the superimposing end portion and the non-visible portion side end portion of the core overlap, the foam of the pad fills a space between the skin and the pad mounting surface, and the skin and the pad mounting surface. With the above A plastic molded article with a pad, characterized in that the side surface portion of the skin is sandwiched between the side wall of the core and the side surface portion. 2. The plastic molded product with a pad according to claim 1, wherein an inwardly projecting concave groove recessed inward is provided on a side surface portion of the skin sandwiched by the side wall of the core and the foam. 3. A pad having a foam covered with a skin is provided on a surface of a core, and a visible portion which is exposed even after being attached to an object and a non-concealed portion which is hidden by the attachment at a mating portion of the pad and the core. A method for producing a plastic molded article with a pad having a visible portion, wherein a pad mounting surface, a side wall formed at a position corresponding to the visible portion on a peripheral edge of the pad mounting surface, and the non-visible portion on a peripheral edge of the pad mounting surface. A core having a non-visible portion side end portion formed at a position corresponding to, is arranged on one mold surface of the split mold so that the pad installation surface faces the other mold surface, and one edge A skin having a side surface portion formed on the side surface portion and a polymerization end portion formed on the non-visible portion side of the side surface portion, the visible portion side surface portion of the skin portion is substantially in contact with the side wall of the core, and The end faces the end on the non-visible side of the core. Thus arranged on the other mold surface, the end for superimposing the skin and the non-visible portion side end of the core are sandwiched between the mold surfaces of the molding die, and liquid between the skin and the pad mounting surface. A method for producing a plastic molded article with a pad, which comprises foaming a foaming raw material and integrating the resulting foam with the skin and the core. 4. The method for manufacturing a plastic molded product with a pad according to claim 3, wherein an inwardly projecting concave groove that is recessed inward is provided on a side surface portion of the skin that is disposed so as to be substantially in contact with the side wall of the core. . 5. The method for manufacturing a plastic molded product with a pad according to claim 3 or 4, wherein an outwardly projecting concave groove that is recessed outward is provided at the superimposing end portion of the skin. 6. The method according to any one of claims 3 to 5,
A method for producing a plastic molded product with a pad, characterized in that a groove facing the inwardly projecting groove on the side surface of the skin is provided on the side wall of the core. 7. The molded plastic product with a pad according to claim 5, wherein a concave groove facing the outwardly protruding concave groove of the superimposing end portion of the skin is provided at the end portion of the core on the invisible portion side. Production method.