JPH09136329A - Manufacture of injection molding with slush molding skin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the yield of material, to control the leakage of a slush- molded skin onto the surface side, and to sufficiently demonstrate the properties as a skin material of the slush-molded skin by minimizing the generation of parts to be discarded on the skin and a resin core in a method for manufacturing a molding in which a resin core is injected inside the slush-molded skin molded in advance. SOLUTION: A fin-shaped flange 7 and an inside-oriented piece-shaped flange 8 are made to be connectingly installed respectively on the periphery and on the outer end periphery of the opening part 6 of a slush-molded skin 5 to be integrated with the skin. After the skin 5 being set on the inner surface of a cavity mold 15, a core mold is engaged and assembled, in a process in which a space part 19 for molding a core body is formed between the surface of a core mold 16 and the back of a skin 5, the fin-shaped flange 7 is held by the molds 15, 16, the inside-oriented piece-shaped flange 8 is fixed at a prescribed position by a slide mold 17 from a back part, and a resin material is injected into the space part 19.

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 an injection-molded article with a slush-molded skin, more specifically, injection-filling a core-molding resin on the back side of the slush-molded skin to limit the necessary parts of the resin core. Then, it relates to a method for producing an injection-molded article coated with a slush molding skin.

[0002]

2. Description of the Related Art Conventionally, a vacuum-formed skin with a laminate has been used as a means for integrally covering the surface of a resin core with a skin. Then, as a synthetic method for laminating the laminated skin to the resin core body, compression molding method, injection molding method, or pre-molded skin is fixed on the cavity surface of the upper mold, and the inner mold is closed. There is a SPM molding method in which the core molding resin is injected into the core, the lower mold is then closed and the injected resin is expanded to perform molding of the core and integration with the skin.

It has also been proposed that a slush molded skin is used in place of the laminated vacuum molded skin, and a resin for molding a core is injected to the back surface side of the skin to integrally mold the both. Due to the unique effect of the slush molded skin, the folded molded product using the slush molded skin can more specifically suppress the decrease in the yield of the skin due to the skin shape element, and the improvement of the texture due to the slush molded skin, the skin. There are many things that surpass laminated vacuum-molded skins, such as improving the appearance of the terminal part and the ease of revealing the skin shape including the expression of details with slush-molded skins.

An in-mold injection-molded article using this slush molded skin has a skin preformed by slush molding, and its outer peripheral edge is trimmed with a cutter or the like so that the skin conforms to a predetermined shape. After the outer skin is fixedly attached to the inner surface of the cavity mold, the core mold is fitted and assembled to this mold to form a space between both molds, more specifically, a space between the back surface of the slash skin and the core mold. In the process of forming a core by injection-filling with a synthetic resin, an injection-molded article can be obtained in which the surface side of the core having the same desired shape is covered with a slush molding skin.

[0005]

There is no particular problem in folding the entire surface of the molded product with the slush molded skin, but for example, a large-sized ceiling portion, which is one of automobile interior parts shown in FIG. 11, is used. In the floor console box 31 having an opening, the main part of the product shape is the peripheral wall of the box, and a large opening is required in the ceiling of the box. Since the ceiling portion of the box thus formed has an opening 36 shown by a dotted line in the portion, the skin 35 and the resin core 33 are formed.
They must be trimmed together, and due to the formation of this opening 36, a considerable amount of material is wasted, resulting in a definite loss of material yield, and this trimming is time and skill consuming. Met.

In the present invention, in manufacturing an injection-molded product with a slush molded skin, the slush molded skin is preformed by conforming to the outer shape of the molded product, and concretely, a product such as an entrance / exit of a molded article or a through window. Corresponding to the relative position of the opening of the slush molding, the opening is formed in advance in the skin itself, and a flange acting integrally as a protective piece is formed in advance in the peripheral edge of the opening of the skin and the outer peripheral edge of the skin. Every time, the flange suppresses the leakage of the core molding resin that is injection-filled on the back side of the slush molded skin, saves the skin material and the filled resin material, and prevents the outer skin, that is, the outer surface of the molded product from being contaminated. It is an object of the present invention to provide a method for manufacturing an injection-molded article with a slush molded skin, which aims at maintaining the above-mentioned properties and further simplifying the molding work quickly.

[0007]

In order to achieve the above object, a method of manufacturing an injection molded article with a slush molded skin according to the present invention is such that each edge of the slush molded skin has a flange integrally formed with the skin in advance. The molding skin is formed on the inner surface of the cavity mold, and when the core mold is fitted and assembled with the cavity mold with the skin, the molding skin is formed between the assembly molds. The flange portion is fixed, and the core molding resin is injected into the void formed between the core mold and the back surface of the slush molding skin.

First, the edge portion of the slush molded skin provided with the flange is the peripheral edge of the opening provided in a part of the skin. This flange, which has a fin shape extending in the direction of the center of the opening and is integrally formed with the slush molding skin, is sandwiched between the mating and assembled molds, and the skin is sandwiched between the pair of molds. And the skin is placed on the inner surface of the cavity mold.

The edge portion of the other slush molded skin provided with the flange is the outer peripheral edge of the skin. The inwardly flared flange that is integrally formed with the skin in the inner direction of the molded skin has a mold that is fitted and assembled, and the inwardly bent state is fixed from the back side to fix the skin end. It is placed on the inner surface of the mold.

The slush molding skin fixedly attached to the inner surface of the assembled cavity mold, more specifically, the slush molding is always performed for the void formed between the back surface of the molding skin and the core mold. The injection port of the resin for molding the core is directly directed to the back surface of the skin.

Regarding the means for injecting the resin for molding the core into the void, the flange at the peripheral edge of the opening of the slush molded skin is sandwiched, and the inwardly flared flange at the peripheral edge of the outer end of the molded skin is used. Of the molds fixed and assembled from the back side, the resin that opens through the core mold that is fitted and assembled into the cavity mold that has the molding skin set on the inner surface and that opens to approximately the center of the skin opening The core body molding resin is introduced into the void formed between the core die and the back surface of the skin through the introduction passage and the resin supply passage radially formed from the end portion of the introduction passage through the resin supply passage cut in the end surface of the core die. Is supplied by injection.

Among the assembled molds, a belt-shaped cover covering the entire resin supply passage formed on the end surface of the core mold is a fin-shaped flange provided at the end edge of the opening of the slush molding skin. The strip-shaped cover is integrally formed and suppresses the leakage of the resin material from the supply passage.

Among the flanges provided on each end edge of the slush molding skin, a step portion which is one step lower than the flange is continuously provided on the outer end peripheral edge of the inward piece-like flange, and the flange and the step portion are connected to each other. The part is trimmed as a trim line, and this trim surface is always expressed inside the skin, and the peripheral finish of the skin is made good.

Of the flanges provided at each end of the slush molding skin, there is a fin-shaped flange provided at the peripheral edge of the opening of the skin, on the resin supply path provided at the end surface of the core mold after fitting and assembly. The lower part of the flange that is located relative to the stepped part is provided with a step portion that is one step lower, and the trim line at the connection part between the flange and the stepped part trims the part of the end surface of the flange to the solid surface layer of the slush-molded skin. Is exposed.

The slush molded skin is composed of a single solid layer, a two-layer laminated structure consisting of a solid surface layer and a foam layer inside the solid surface layer, or both surfaces of the foam layer. Each has a three-layer laminated structure in which a solid surface layer and a solid back surface layer are arranged, and one of these is selected as the skin.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an example of a method for producing an injection-molded article with a slush molded skin according to the present invention will be specifically described as a method for producing a floor console box as one of automobile interior parts. This will be described with reference to the drawings.

FIG. 1 is a perspective view showing a floor console box manufactured by carrying out the present invention by cutting out an end portion thereof, and a recessed ceiling opening 2 is formed in a ceiling portion which constitutes an overall shape of a product 1. The synthetic resin core 3 is covered with a slush molded skin 5 on its surface, leaving a lower portion 4 hidden in the floor of the automobile.

The skin 5 has a good texture and is formed by slush molding in which it is relatively easy to express its accurate shape including the edge portion and the surface portion,
An opening 6 is formed in the ceiling portion of the skin 5 so as to correspond to the recessed ceiling opening 2 of the core body 3.

A fin-shaped flange 7 is formed integrally with the skin at the periphery of the opening 6 of the skin, and the fin-shaped flange 7 is located at the peripheral portion of the ceiling opening 2 of the core body and has an internal resin core. Body 3
Is concealing.

The outer peripheral edge of the slush molded skin 5 covering the peripheral wall surface of the floor console box 1 is
An inwardly facing piece-shaped flange 8 is formed integrally with the outer skin, and the flange 8 holds a part of the resin core body 3 to prevent the outer end portion of the outer skin 5 from being peeled off from the core body 3. It has been fixed to the strong resin core surface.

Reference numeral 9 is a partition box for partitioning the ceiling opening of the product, and the box product 1 whose interior is partitioned by the partition box.
From the ceiling opening of the
Fit inside.

The slush molded skin 5 used in the present invention is a single solid surface layer 5 shown in FIG.
a, a two-layer laminated skin in which a solid surface layer 5a on the surface side of the skin 5 and a foam layer 5b are laminated inside the skin as shown in FIG. 7, or the two-layered skin as shown in FIGS. A three-layer laminated skin in which a solid back surface layer 5c is further laminated on the back surface side of the laminated skin (FIG. 7) can be used.

The slush molding skin 5 is excellent in accurately expressing the shape of the molding die. As part of the epidermis composition,
As shown in FIG. 7 and FIG. 8, by interposing the foam layer 5b, the molded skin 5 itself is rich in elasticity and the contact feeling can be made good.

Further, as shown in FIG. 8, by arranging a solid surface layer 5a and a solid back surface layer 5c on both sides of the foam layer 5b, the presence of this solid layer occurs during the process of manufacturing the injection molded product. It is possible to prevent the core molding resin from entering into the foamed layer 5b, suppress the occurrence of the hardening phenomenon of the surface skin, and further improve the surface appearance and feel of the finished product for a long period of time. .

FIG. 2 is a perspective view showing the console box by cutting out the end portion of the console box immediately after it is removed from the molding die, and FIGS. 3 and 4 are sectional views taken along the line AA and BB of the box shown in FIG.
It is a sectional view including a metallic mold immediately after completion of molding of a product in a metallic mold in a section line position.

Molded skin 5 manufactured by slush molding
The material is a pulverized product of vinyl chloride resin or other thermoplastic elastomer, and the core 3
As the molding material, polypropylene, ABS, polystyrene resin or the like is used.

A slush molded skin 5 having a recessed opening 6 formed in the ceiling, which integrally covers the exposed surface of a desired box, is preliminarily formed on each edge of the skin in the slush molding process. Specifically, the flanges 7 and 8 are integrally formed on the opening 6 and the outer peripheral edge, respectively.

Next, the flange 7 of the slush molded skin 5 with a flange will be described using a three-layer laminated molded skin shown in FIG. 8 which has many advantages over its structure.

As shown in FIG. 9, the flange 7 provided on the periphery of the opening of the skin 5 extends like a fin toward the center of the opening. Then, as shown in the upper part of FIG. 9, the flange 7 is attached to the resin supply passage 22 portion provided on the end face of the core mold 16 which will be described later with reference to FIG. A step portion 9 that is one step lower is integrally provided on a part of the flange 7 that is relatively located.
Of the flange 7, more specifically, the intersection of the bottom surface extension of the flange 7 and the step 9 is trimmed as a trim line, and the trim surface 10 of the flange 7 is always expressed inside the skin, more specifically, on the back surface of the flange 7. Core mold 1 of the flange 7
The solid surface layer 5a of the molding skin 5 is exposed in a woven shape at the end surface portion of the flange that is relatively aligned with the resin supply passage 22 of 6.

As a result, when the skin 5 is set in the cavity mold 15, the end face itself on which the solid surface layer of the flange having the accurate shape is arranged is positioned on the resin supply path 22 by slush molding. Therefore, it is possible to reliably prevent the resin from entering the foam layer 5b from the end of the flange 7 which is a concern during the subsequent press-fitting of the core-molding resin.

Of the end face of the flange 7, the other part of the flange 7 on which the solid surface layer 5a is arranged is shown in FIG.
Middle, trimmed along the dotted line (a)
The solid surface layer 5a and the foamed layer 5b forming the skin 5 are continuous with the flange end surface portion where the solid surface layer 5a is exposed.
And the three-layer laminated structure of the solid back surface layer 5c is shown on the trim surface (see FIG. 10).

The flange 7 portion, which has a trim surface showing a three-layer structure exposed on the end face, is a mold for both the cavity and the core 1.
The elastic effect of the flange 7 further strengthens the sealing effect on the core molding resin that is sandwiched and sandwiched by 5, 16 and is filled.

On the other hand, a flange 8 provided on the outer peripheral edge of the outer skin
Is formed by an inward piece in which the edge of the skin 5 is bent to the inner surface. As shown in the lower part of FIG. 9, the inward flange 8 has a stepped portion 11 that is one step lower than the flange 8 that extends parallel to the peripheral wall of the epidermis at the tip of the inward flange 8.
Is continuously provided in advance, and the connecting portion between the flange 8 and the step portion 11 is trimmed as a trim line (b). The trim surface 12 of the flange 8 is configured to be always expressed inside the skin. The finished product itself, and thus the finished product, is beautiful.

A slush molded skin 5 having the above shape
After being attached to the inner surface of the cavity mold 15 as shown in FIG. 3, the core mold 16 is fitted into the cavity mold 15, and the openings of the molding skin 5 are opened by the two molds 15 and 16. The fin-shaped flange 7 provided on the periphery of the portion 6 is sandwiched by fitting and assembling of both molds, and the molding skin 5 is firmly fixed to the surface of the cavity mold 15.

On the other hand, in the process of assembling the two molds 15 and 16, the slide mold 17 which is divided over the entire circumference between the two molds and can be assembled is moved toward the center of both molds. By this movement, the inner end protrusion 18 of the slide die 17 presses the inwardly-facing piece-shaped flange 8 portion provided on the outer peripheral edge of the molding skin 5 from the back portion to bring the flange 8 portion to a predetermined position. Fix it.

Both the cavity and core molds 15,
16 and the slide mold 17 are fitted and assembled, between the molds, more specifically, between the back surface of the slush molding skin 5 and the core mold 16, or partially, but the core mold 1.
An annular space 19 is formed between 6 and the slide mold 17 so as to match the shape of the core body.

At the center of the core mold 16 corresponding to the approximate center of the opening 6 of the molding skin 5, the core mold 16 has a tip opening.
Of the resin introduction passage 21 opening to the end face of the
From the tip end of the core metal molding resin is press-fitted from the resin introduction passage 21 through the resin supply passage 22 radially communicated with the annular space 19 formed in the end surface of the core mold 16.
The resin is filled and supplied to the annular space 19 via the resin supply passage 22.

On the resin supply path 22 of the core mold 16 fitted and assembled to the cavity mold 15, a part of the end face of the flange 7 of the molding skin 5 which is pinched and fixed in position is fixed. In particular, by arranging the woven solid surface layer 5a, the pressurized core-molding resin that is filled and supplied does not directly penetrate into the foam layer 5b in the skin 5 and It suppresses the occurrence of local curing and makes the appearance and feel of the finished product good.

Furthermore, by using a three-layer laminated skin using the solid back surface layer 5c shown in FIG. 8 as the slush molding skin 5, it is possible to prevent the core molding resin from entering the foam layer 5b in the skin 5. The elasticity expected on the skin 5 can be ensured for a long period of time.

When the core molding resin is filled in the cavity 19, the skin opening 6 tightly seals between the molds 15 and 16 with the flange 7 provided at the peripheral edge of the skin opening 6, thereby allowing the flow under pressure. The resin material does not leak to the surface side of the skin 5,
The resin material under pressure is supplied only to the back surface side of the outer skin 5 when the annular space 19 is filled, and in the process of flowing down the inner space 19, the outer skin 5 is moved to the cavity mold. By pressing on the inner surface of 15, the accurate product shape is expressed on the core body and the epidermis.

Since the resin material is directly supplied to the back surface side of the skin and flows down, the flange 8 portion provided on the outer peripheral edge of the skin is not peeled off from the inner surface of the cavity mold 15 and the end surface of the slide mold. Since the shape of the flange at the outer edge of the outer skin can be accurately maintained and the shape can be retained, leakage of the injected resin material from the outer edge of the outer skin can be prevented, and the surface of the outer skin can be used for core molding. It is possible to eliminate the concern that the resin material will be contaminated.

FIG. 5 is a view showing another embodiment of the console box immediately after demolding shown in FIG.
At the position corresponding to the resin supply path 22 cut on the end surface of the core mold 16 fitted and assembled to the slush molding skin 5
The resin supply passage 22 integrally formed with the flange 7 in such a manner that the fin-shaped flanges 7, 7 provided on the periphery of the opening of the
By providing a slightly wider strip-shaped cover 7a and covering the resin supply path 22 with the strip-shaped cover 7a for the entire length, when the resin for molding the core body is injected, the pressure resin material outside the resin supply path 22 is removed. Leakage can be suppressed more reliably.

The core mold 16 of the console box 1
After demolding, the strip-shaped cover 7a portion is cut and removed together with the resin bridge portion 25 integrally remaining on the back surface of the strip-shaped cover 7a. Needless to say, the Y-shaped resin bridge portion 25 shown in FIG. 2 is also provided with a similar Y-shaped band cover in a plan view to prevent the resin material from leaking out, but the existence of the band-shaped cover 7a is reduced to that extent. As a result, the yield of the slush molded skin is reduced.

When the filling of the resin material is completed, the molded product and the lower end of the front half of the console box 1 are held by the inward flange 8 of the skin, and in the latter half, the flange 8 is the middle of the core body. Part, slide type inner end protrusion 18
A part of the core body is embraced in the inside of the parting groove 20 relatively formed by, and the outer peripheral edge of the outer skin is stably fixed in the core body 3 by using the flange 8 thereof.

Although the resin core 3 is exposed in the lower half of the rear half of the box 1 in the non-skin state, the exposed portion is located below the floor when the box is mounted on the automobile floor. Only the skin portion of the box 1 is exposed on the floor surface.

When the opening portion of the console box 1 is divided as needed, the resin corresponding to the shape of the partition 13 is formed on the end surface of the core die 16 of the die assembled and assembled as described above. By separately providing the supply path 22, the partitioning members 13 and 13 can be formed at the same time when the core body is formed.

When the console box 1 is released from the mold after completion of the molding, first, the slide mold 17 is retracted outward, and the core mold 16 with the molded product attached is separated from the cavity mold 15 to finally release the mold. Molded product 1 is core mold 16
Will be removed more. After that, the resin introducing portion 21 and the resin supplying passage 22 provided on the end surface of the core mold 16 cut and remove the resin bridge portion 25 remaining in the product opening portion on the rear surface side of the fin-shaped flange 7.

[0048]

By applying the slush molded skin to the skin covering the surface of the molded product, the good texture possessed by the skin, the appearance of the cut-off at the end of the skin, and the overall shape of the entire skin are clarified. The expression of details and good shape retention can be revealed directly on the product, and the material itself can be linked to the improvement of product price.

In the slush-molded skin forming a part of this molded product, the skin opening is formed in advance at a position corresponding to the opening of the product from the time of forming the skin, and the slush-molded skin is also formed. Even when molding, to the place corresponding to the opening of the product,
By completely cutting off the supply of the resin for molding the core body, the generation of the material to be discarded can be suppressed as much as possible, and the improvement of the yield of the material by this effectively works directly in terms of the cost of the product.

At the time of forming the skin, a flange is integrally connected to the edge of the slush-molded skin in advance, and the fin-shaped flange portion provided around the opening of the molded skin is a pair of molds. When mated, they are clamped by both molds,
By the sandwiching, it is possible to seal the end of the void for molding the core formed between the two molds, to prevent the injection resin material from leaking from the portion to the skin surface, and to avoid waste of the resin material,
It is possible to reliably prevent the skin surface from being soiled. Further, since the resin for molding the core is not supplied to the ceiling opening portion of the core by the seal of the skin, the waste of the resin material, that is, the yield of the material can be improved also in this aspect.

Further, the presence of another flange provided on the peripheral edge of the molded skin, that is, an inwardly flared flange extending to the inside of the skin, causes the core-forming resin material to be injected into the assembled void. Can be prevented from leaking to the skin surface side, and the occurrence of contamination by the leaked resin on the skin surface from the edge is also prevented. Further, after the molding, the flange portion bites into the core body, and the flange having a part of the core body wound therein effectively suppresses the peeling of the outer end portion of the epidermis from the core body.

Further, the core resin injected into the void is always supplied directly to the back surface of the skin, so that the edge of the skin is peeled off from the inner surface of the cavity mold by the resin pressure when the resin is injected. In this case, the shape of the edge portion of the skin is accurately fixed, and the leakage of the core-forming resin from the skin edge can be reliably suppressed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a console box according to the present invention with an end portion cut away.

FIG. 2 is a perspective view in which an end portion of a console box immediately after demolding from a molding die is cut away.

FIG. 3 is a cross-sectional view including a mold of a molded product in the mold at a line AA sectional line position of the box shown in FIG.

FIG. 4 is a cross-sectional view including a mold of a molded product in the mold at a line BB section line position of the box shown in FIG.

FIG. 5 is a view corresponding to FIG. 2 showing another embodiment.

FIG. 6 is a longitudinal cross-sectional view of a portion of a single layer slush molded skin.

FIG. 7 is a longitudinal sectional view of a part of a two-layer laminated slush molded skin.

FIG. 8 is a partial vertical cross-sectional view of a three-layer laminated slush molded skin.

FIG. 9 is a perspective view of a part of the skin in which a step portion is integrally provided at a tip end portion of a flange provided on the opening portion of the skin and an outer peripheral edge.

FIG. 10 is a perspective view of a part of the epidermis after trimming the step portion shown in FIG.

FIG. 11 is a perspective view of a conventional console box with a slush-molded skin, in which the opening before cutting the opening is cut away.

[Explanation of symbols]

 1 Molded Product (Console Box) 3 Resin Core 5 Slush Molded Skin 5a Solid Surface Layer 5b Foamed Layer 5c Solid Back Layer 6 Skin Opening 7 Fin-like Flange 8 Inward Flange Flange 9 Step 10 Trim Surface 11 Step Part 12 Trim surface 15 Cavity mold 16 Core mold 17 Slide mold 18 Inner end protrusion 19 Void 21 Resin introduction path 22 Resin supply path

Claims (11)

[Claims] 1. A slush molded skin is preliminarily formed with a flange at each edge portion integrally with the skin, and the skin is face-bonded to the inner surface of the cavity mold, and the cavity mold and the core metal combined with the cavity mold. A method for producing an injection-molded product with a slush molded skin, comprising fixing the flange portion with a mold by a mold and injecting a core-molding resin into a void formed between the core mold and the back surface of the skin. 2. A fin-shaped flange extending in the central direction of the opening is integrally formed with the skin on the periphery of the opening provided in a part of the slush molded skin, and the flange is fitted and assembled. The method for producing an injection-molded article with a slush molding skin according to claim 1, wherein both sides of the cavity mold and the core mold are clamped and fixed. 3. The outer edge of the slush molded skin has a peripheral edge,
An inwardly extending piece-like flange extending inward of the molding skin is formed integrally with the skin, and the flange has a cavity mold and a slide mold assembled and assembled, and the inward state is fixed from the back side of the skin. The method for producing an injection-molded article with a slush molded skin according to claim 1. 4. The injection port of the core-molding resin into the void formed between the core mold and the slush molding skin fixed to the inner surface of the cavity mold is always the back surface of the slush molding skin. The method for producing an injection-molded article with a slush-molded skin according to claim 1, wherein the method is directed directly to the portion. 5. A fit formed by sandwiching a fin-shaped flange around an opening provided in a part of a slush molded skin, and fixing an inward flange on the peripheral edge of the molded skin from the back side. Among the assembled molds, a resin introducing passage that is provided so as to penetrate through the core die and opens toward the substantially central portion of the skin opening, and at least one core die from the end of the introducing passage. The slush molding skin according to claim 1, wherein the core body molding resin is injected into a void formed between the mold and the back surface of the skin through a resin supply passage formed on the end face. Of injection-molded product with a seal. 6. A strip-shaped cover body, which covers the entire surface of a resin supply passage formed on an end surface of a core die of the assembled die,
The method for producing an injection-molded article with a slush-molded skin according to claim 5, wherein the slush-molded skin is integrally formed with a flange provided around the opening of the skin. 7. A trim surface formed by a trim line at a connecting portion between the flange and the step portion, wherein a step portion having a lower step is provided in series at the tip portion of an inwardly-facing flange provided on the outer peripheral edge of the slush molded skin. The method for producing an injection-molded article with a slush-molded skin according to claim 1, wherein is always expressed inside the skin. 8. Among the fin-shaped flanges provided on the periphery of the opening of the slush molding skin, a part of the flanges located on the end face of the core mold after fitting and assembling and facing each other is provided with one step. 6. A slush molded skin according to claim 5, wherein a low step portion is provided, and a solid upper layer surface of the slush molded skin is exposed at a part of an end surface of the flange by trimming with a trim line of a connecting portion between the flange and this step portion. Of injection-molded product with a seal. 9. The method for producing an injection-molded article with a slush molded skin according to claim 1, wherein the slush molded skin is formed of a single solid layer. 10. The method for producing an injection-molded article with a slush molded skin according to claim 1, wherein the slush molded skin is a two-layer laminate in which a solid surface layer and a foam layer inside the solid surface layer are laminated. 11. The slush molded skin according to claim 1, wherein the slush molded skin comprises a three-layer laminate in which a solid surface layer is laminated on the front side of the foam layer and a solid back surface layer is laminated on the back side of the foam layer. Manufacturing method of injection-molded product with skin.