JP2007160736A - Molding method and molding device for skin material laminated expanded resin molded article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and a device which can easily suppress the generation of wrinkles on a skin material resulting from a core back while favorably maintaining the setting property of the skin material. <P>SOLUTION: A frame-like third die 50 for which a window section having approximately the same shape as the outer periphery of a core 42 is formed by an edge section 51 is arranged between a first die 30 having a recess-like engraved section 32 and a second die 40 having the protrusion-like core 42. The skin material 12 is held along the skin material holding surface 55 of the third die 50, and the skin material internal section 12a spanning the window section 52 is pushed into a cavity 35 by the front surface of the core 42 while forming the cavity by closing the dies. Then, an expanding resin 92 is injected, and the resin is expanded while performing the core back by this molding method for the skin material laminated expanded resin molded article. In the molding method, after the starting point of the die closing or prior to the starting point of the core back, the section 12a which has been pushed into the cavity and the section 12b which is held along the skin material holding surface of the skin material 12 are automatically separated. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a molding method and a molding apparatus for a foamed resin molded product in which a skin material is integrally laminated on the surface, and more particularly to a core back molding using a frame-shaped mold.

  In recent years, resin products made of a foamable resin for the purpose of weight reduction and the like are being used frequently. In such a method for molding a foamed resin molded article, it is common to inject a foamable resin into a cavity (a space formed by a mold) and foam it with a foaming agent or a supercritical fluid. The cavity is basically formed by a first mold (so-called female mold) having a concave engraving and a second mold (so-called male mold) having a convex core.

  In such a foamable resin molded product, a skin material such as a nonwoven fabric may be laminated on the surface of the molded product for the purpose of improving sound insulation and improving the appearance. As a suitable molding method in such a case, a skin material is disposed along the mold surface constituting the cavity at the time of clamping, and foamed and molded in the cavity (hereinafter referred to as skin material lamination molding). )It has been known. According to the skin material lamination molding, the skin material is laminated on the surface of the molded product at the same time as the molding, so that the process is simplified and more efficient than the case where the skin material is separately bonded after the resin molding. For example, Patent Document 1 discloses a skin material lamination molding using an olefin-based thermoplastic elastomer sheet as a skin material.

  On the other hand, apart from the above-mentioned skin material lamination molding, a molding method called core back molding is generally known. The core back molding is a molding method in which the cavity volume at the time of foaming resin injection is made smaller than that at the time of foaming, and foaming is performed while expanding the cavity volume immediately after the foamable resin is injected. The cavity volume is enlarged by a core back that separates the first mold and the second mold. By performing the core back molding, foaming can be further promoted and a molded product having a high foaming rate can be obtained. For example, Patent Document 2 discloses a technique in which a first mold is a movable mold, a second mold is a fixed mold, and a foamable resin is injected into a cavity and then cored back. In this example, the second mold having the core is fixed, and the first mold having the engraving is separated from the second mold. As described above, the core back may be formed by moving the first mold and the second mold relatively apart from each other, and any mold that is actually moved may be used.

  By the way, when performing core back molding, it is necessary to pay attention to the influence of the skin layer. The skin layer is a layer having a low foaming rate formed in the vicinity of the surface of a molded product close to the mold surface in general foaming resin molding. A problem often encountered in core back molding is a skin layer formed along the engraved contour surface of the first mold in the mold opening / closing direction (the relative movement direction of the first mold and the second mold) (hereinafter referred to as the skin layer). In the case of simply a skin layer, this skin layer shall be indicated). In the part with high foaming rate inside the skin layer, the expansion of the cavity volume by the core back is suitable for promoting foaming, whereas in the part where the skin layer is formed, the foaming rate is low. However, since the cavity volume is forcibly enlarged, the foamed resin is difficult to reach the details of the mold, and there is a possibility that the moldability is deteriorated and the overall rigidity is lowered.

  In such a case, the volume in the mold opening / closing direction in the vicinity of the skin layer is not increased, and a solid portion having a low foaming rate may be intentionally formed so that the skin layer is included in the solid portion. As a specific measure, for example, a molding method using a frame-shaped third mold together with the first mold and the second mold is effective. In the third mold, a window portion having substantially the same shape as the outer periphery of the second mold core is formed by an edge portion. And this 3rd type | mold is interposed between the said 1st type | mold and 2nd type | mold, and a core back is performed in the state by which the core was penetrated by the window part of the 3rd type | mold. In order to form the solid part including the skin layer by the molding method using the third mold, at least the vicinity of the window part of the edge of the third mold is a part of the mold surface constituting the cavity (hereinafter, this part is referred to as “part”). (Referred to as a cavity constituting edge). That is, the core outline may be made smaller than the outline of the first mold engraving in the mold opening / closing direction view.

In this way, the core back expands the volume in the mold opening / closing direction at the position corresponding to the core in the mold opening / closing direction view, but the volume in the mold opening / closing direction at the position corresponding to the cavity configuration edge (outside the core). No enlargement is made. Therefore, a solid portion is formed at a portion corresponding to the cavity constituting edge portion. For example, in Patent Document 3, a frame-shaped third mold is configured by combining a plurality of slide cores (molds that slide in a direction perpendicular to the mold opening / closing direction) provided around the core, and a solid that includes a skin layer. (However, in this patent document, the entire solid part including the skin layer is referred to as a skin layer, and a thick skin layer is formed).
JP 2002-219726 A JP 2003-39517 A JP-A-8-90599

  In performing the above-mentioned skin material lamination molding, it is possible to use a core back molding using a frame-shaped third mold in combination. However, in this case, the following problems occur depending on the conditions.

  This is a problem that occurs particularly when the skin material is laminated at least on the second mold side (core side). As will be described below with reference to FIG. 10, wrinkles due to loosening occur in the skin material. is there.

  FIG. 10 is a diagram showing a molding process of the prior art by the injection molding apparatus 100 when the core material molding using the frame-shaped third mold is used in combination with the skin material lamination molding. (A) is a mold touch state in the middle of the mold clamping process, (b) is a state where the mold clamping process is completed, and (c) is a diagram showing a state where the core back is completed in the foaming process. However, in (c), illustration of a foamable resin is abbreviate | omitted for convenience of explanation.

  As shown in FIG. 10A, the injection molding apparatus 100 includes a first mold 130 having a concave engraving 132, a second mold 140 having a convex core 142, and an outer periphery of the core 142 by an edge 151. The frame-shaped third mold 150 formed with the substantially identical window 152 is arranged so that the engraving 132 and the core 142 face each other, and the core 142 is inserted into the window 152 by clamping. ing. In the injection molding apparatus 100, the second mold 140 is a fixed mold, and the first mold 130 and the third mold 150 are movable molds. Connected to the second mold 140 is a tip nozzle of an injection unit 160 that injects a foamable resin into the cavity 35.

  As a first step, an unillustrated skin material setting step is provided. In the skin material setting process, the skin material 16 is set along the shape of the engraving 132 on the first mold 130 side in the mold open state, and in the mold opening / closing direction (left-right direction in the figure) on the second mold 140 side. The skin material 12 is set from the edge portion 151 to the window portion 152 along the skin material holding surface 155 of the vertical third mold 150.

  In the mold clamping process following the skin material setting process, first, the first mold 130 is moved closer to the second mold 140 while the skin material holding surface 155 of the third mold 150 is kept flush with the tip surface of the core 142. It is done. A state where the first mold 130 is in contact with the third mold 150 via the skin material 12 and the skin material 16 is a mold touch state shown in FIG. When the mold is touched, a closed space, that is, a cavity 35 is formed by the first mold 130, the second mold 140, and the third mold 150.

  After the mold touch, the first mold 130 and the third mold 150 move together in the direction of the second mold 140. As a result, the core 142 relatively enters the cavity 35. At that time, the portion (skin material inner portion 12 a) of the skin material 12 that covers the window 152 is also pushed relatively toward the tip of the core 142 and pushed into the cavity 35 side from the skin material holding surface 155.

  At the time of completion of mold clamping shown in FIG. 10B, the core 142 has entered the cavity 35 relatively deepest. The actual area of the skin material 12 in the cavity 35 at this time is larger than the projected area in the mold opening / closing direction (area before mold clamping). This is because a step is generated between the skin material inner portion 12a and the skin material outer portion 12b, and a slope-like slope portion 12c that connects the steps is formed. This increase in area is achieved, for example, by stretching the skin material 12, pulling in from the outside (skin material outer portion 12b), or the like.

  When the mold clamping is completed, the foaming resin is injected (injected) into the cavity 35 by the injection unit 160 in the next injection step. Further, in the foaming process immediately after that, foaming is performed while performing the core back that separates the first mold 130 and the third mold 150 from the second mold 140. Since the volume of the cavity 35 is expanded by this core back, foaming is promoted and a molded product having a high foaming rate can be obtained.

  FIG. 10C shows a state where the core material is held back to a position where the skin material holding surface 155 of the third mold 150 is flush with the tip surface of the core 142. As shown in this figure, when the core is backed up, the skin material 12 having an increased area becomes loose. In the figure, for the purpose of explanation, the skin material 12 is shown as slack and a slack portion 12d is formed, but the skin material 12 is actually pressed outward by a filling pressure or foaming action of a foaming resin (not shown). In close contact with the core 142 and the edge 151. In this state, foaming is completed, and a molded product integrated with the skin material 12 is obtained. At this time, the area increase of the skin material 12 becomes wrinkles and appears on the surface of the molded product. This wrinkle is not preferable in appearance.

  In order to prevent the wrinkles, for example, in the skin material setting step, the skin material 12 is previously separated into the skin material inner portion 12a and the skin material outer portion 12b, and the core 142 and the skin material holding surface 155 are respectively separated. A method of setting them separately can be considered. However, in this case, the setability of the skin material 12 is deteriorated, and a new problem occurs that the operation becomes complicated and the apparatus becomes complicated.

  In view of such circumstances, the present invention, in the skin material layered molding combined with the core back molding using a frame-shaped mold, the wrinkle of the skin material due to the core back while maintaining the setability of the skin material is good It is an object of the present invention to provide a molding method and a molding apparatus that can easily suppress the above.

  The invention according to claim 1 for solving the above-mentioned problems is that a first mold having a concave engraving, a second mold having a convex core, and a window portion having substantially the same shape as the outer periphery of the core is formed by an edge. The frame-shaped third mold is disposed so that the engraving and the core are opposed to each other, and the core is inserted into the window portion by clamping, so that the first mold and the second mold are disposed. A skin material is held from the edge portion to the window portion along the skin material holding surface of the third mold, which is substantially perpendicular to the mold opening / closing direction which is a relative movement direction with the mold, and the first mold, the While forming the cavity by clamping the second mold and the third mold, the skin material applied to the window portion was pushed into the cavity inside the skin material holding surface on the front surface of the core and formed. A foamable resin is injected into the cavity to separate the first mold and the second mold. In the molding method of the skin material laminated foamed resin molded product in which the foamable resin is foamed in the cavity while performing the core back to enlarge the cavity volume, the time after the start of the mold clamping and the time of the start of the core back Previously, the portion of the skin material pushed into the cavity and the portion held along the skin material holding surface are automatically separated.

  Note that the mold movement in the core back relatively separates the first mold and the second mold. Regardless of the name of the core back, even if the mold to be actually moved is the first mold, It may be of type 2 or both.

  The invention according to claim 2 is the molding method of the skin material laminated foamed resin molded product according to claim 1, wherein at least the vicinity of the window portion of the edge portion forms a part of the mold surface constituting the cavity. The foaming rate of the foamable resin corresponding to the cavity constituent edge as viewed in the mold opening / closing direction is lower than the foaming rate of the foamable resin corresponding to the core.

  The invention according to claim 3 is the molding method of the skin material laminated foamed resin molded product according to claim 1 or 2, wherein the skin material is automatically separated during the mold clamping, and the skin material Is held in contact with the boundary between the skin material holding surface and the window portion, and when the front surface of the core passes through the window portion, the skin material is applied by a shearing force acting on a location in contact with the boundary. Is automatically disconnected.

  The invention according to claim 4 is the molding method of the skin material laminated foamed resin molded article according to claim 2, wherein the skin material is automatically separated during the injection of the foamable resin. At the time of completion of tightening, a slope portion is formed on the skin material to connect the step between the portion held along the skin material holding surface and the portion pushed inside the cavity into a slope shape, The skin material is automatically cut off at the slope portion by a filling pressure when the foamable resin is injected.

  The invention according to claim 5 is the molding method of the skin material laminated foamed resin molded product according to any one of claims 1 to 4, wherein the separation amount between the first mold and the second mold in the core back. Is substantially equal to the amount of approach from the skin material holding surface of the front surface of the core to the cavity side during the mold clamping.

  The invention according to claim 6 is the molding method of the skin material laminated foamed resin molded product according to any one of claims 1 to 5, wherein a separation line is set in the skin material, and the separation line is A fragile part is previously formed along.

  The invention according to claim 7 is the molding method of the skin material laminated foamed resin molded product according to any one of claims 1 to 6, wherein the foamable resin contains reinforcing fibers in advance. Features.

  The invention according to claim 8 is the molding method of the skin material laminated foamed resin molded product according to any one of claims 1 to 7, wherein the foamable resin contains a supercritical fluid in advance. It is characterized by.

Note that the supercritical fluid is a known fluid in which carbon dioxide (CO ₂ ), nitrogen (N ₂ ), or the like is in a critical state of a predetermined critical temperature or higher and a critical pressure or higher.

  The invention according to claim 9 is a first mold having a concave engraving, a second mold having a convex core facing the engraving, and an outer shape substantially the same as the outer periphery of the core, and the core is inserted therethrough. A window-shaped third mold formed by an edge, and a mold moving means for relatively moving at least the first mold and the second mold in the mold opening / closing direction across the third mold. A skin holding means for holding the skin material from the edge portion to the window portion along the third type skin material holding surface substantially perpendicular to the mold opening / closing direction, and injecting a foamable resin into the cavity The skin moving material is applied to the window while the mold moving means clamps the first mold, the second mold, and the third mold holding the skin material to form a cavity. Is pushed into the cavity inside the skin material holding surface at the front surface of the core, After that, the injection means injects the foamable resin into the cavity, and the mold moving means expands the cavity volume by separating the first mold and the second mold during the subsequent foaming. In the molding apparatus for the skin material laminated foamed resin molded article, the portion pressed into the cavity inside the skin material and the skin material holding surface after the mold clamping start time and before the core back start time It is characterized by being configured to automatically separate the portion held along.

  The invention according to claim 10 is the molding apparatus of the skin material laminated foamed resin molded product according to claim 9, wherein at least the vicinity of the window portion of the edge portion forms a part of the mold surface constituting the cavity. The foaming rate of the foamable resin corresponding to the cavity constituent edge as viewed in the mold opening / closing direction is lower than the foaming rate of the foamable resin corresponding to the core.

  The invention according to claim 11 is the molding apparatus for the skin material laminated foamed resin molded product according to claim 9 or 10, wherein the skin material is automatically separated during the mold clamping, and the skin material Is held in contact with the boundary portion between the skin material holding surface and the window portion, and when the front surface of the core passes through the window portion, the skin material is automatically applied by a shearing force acting on the boundary portion. It is characterized by being separated.

  The invention according to claim 12 is the molding apparatus for the skin material laminated foamed resin molded product according to claim 10, wherein the skin material is automatically separated during the injection of the foamable resin, At the time of completion of tightening, a slope portion is formed on the skin material to connect the step between the portion held along the skin material holding surface and the portion pushed inside the cavity into a slope shape, The skin material is automatically cut off at the slope portion by a filling pressure when the foamable resin is injected.

  A thirteenth aspect of the present invention is the molding apparatus for a skin material laminated foamed resin molded product according to any one of the ninth to twelfth aspects, wherein a separation amount between the first mold and the second mold in the core back. Is substantially equal to the amount of approach from the skin material holding surface of the front surface of the core to the cavity side during the mold clamping.

  The invention according to claim 14 is the molding apparatus for the skin material laminated foamed resin molded product according to any one of claims 9 to 13, wherein the foamable resin contains reinforcing fibers in advance. Features.

  The invention according to claim 15 is the molding apparatus for the skin material laminated foamed resin molded product according to any one of claims 9 to 14, wherein the foamable resin contains a supercritical fluid in advance. It is characterized by.

  According to the invention of claim 1, as described below, in the skin material lamination molding using the core back molding using a frame-shaped mold, it is caused by the core back while maintaining the setability of the skin material satisfactorily. Generation of wrinkles in the skin material can be easily suppressed.

  According to the configuration of the present invention, after the mold clamping start time and before the core back start time, the part pushed into the skin material engraving side and the part held along the skin material holding surface are automatically cut. Let go. In other words, since the skin material is already separated when performing the core back, the skin material pushed into the cavity is not loosened by the core back. Therefore, generation of wrinkles due to the slack is effectively suppressed.

  On the other hand, when setting the skin material on the mold portion, it is only necessary to hold the uncut skin material from the edge portion to the window portion along the third-type skin material holding surface. In other words, the setting property of the skin material can be maintained satisfactorily because only one set operation is required.

  According to the invention of claim 2, as described below, the deterioration of the moldability and the decrease of the overall rigidity in the skin layer are effectively suppressed.

  According to the configuration of the present invention, the core back increases the volume in the mold opening / closing direction at a position corresponding to the core as viewed in the mold opening / closing direction, but does not increase the volume at the position corresponding to the cavity constituting edge. Therefore, a solid portion having a low foaming rate is formed at a location corresponding to the cavity constituent edge. For this reason, the skin layer is included in the solid part (the width of the cavity constituting edge is made larger than the thickness of the skin layer), so that the skin layer that has a low foaming rate is forcibly expanded in volume. Therefore, the deterioration of the moldability and the decrease in the overall rigidity due to this are effectively suppressed.

  According to the invention of claim 3 or claim 4, there is no need for a separate cutter for separating the skin material, a driving means of the cutter, or a control means thereof, and the shearing force is achieved with a simple configuration (claim 3). ) Or filling pressure (Claim 4), the skin material can be automatically separated.

  According to the invention of claim 5, the skin material pushed into the first die engraving side at the time of clamping is returned to the skin holding surface of the third die at the time of foaming. That is, the pressed skin material is returned to form the same surface again as the non-pressed skin material, so that no discontinuous portion of the skin material due to separation occurs on the surface of the molded product. In particular, when the third die has a cavity constituting edge (see claim 2), a continuous surface of the skin material can be formed on the surface of the molded product corresponding to the boundary between the edge and the core.

  According to the invention of claim 6, since the skin material is easily separated at the fragile portion along the separation line, it is possible to improve the separation position accuracy.

  According to the invention of claim 7, the rigidity of the molded product can be improved by the reinforcing fiber. In particular, when glass fiber, carbon fiber, nanofiber or the like is selected as the reinforcing fiber, a springback phenomenon in which the reinforcing fiber rises in the mold opening / closing direction during foaming is effective. Due to the springback phenomenon, the physical properties of the molded product such as rigidity can be enhanced while further promoting foaming. As other reinforcing fibers, linear or granular fillers or natural fibers may be selected.

  According to the invention of claim 8, a finer and more uniform foamed cell structure can be formed, and the physical properties of the molded product such as rigidity can be improved. This is because a supercritical fluid having properties that the density is close to that of a liquid and the fluidity is in a gaseous state actively moves in the molten resin during foaming and diffuses deep into the molecule.

  According to the ninth to fifteenth aspects of the present invention, it is possible to easily obtain a molding apparatus for a skin material laminated foamed resin molded product having the effects corresponding to the first, second, third, fourth, fifth, seventh and eighth aspects, respectively. .

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

  FIG. 1 is a perspective view showing a usage pattern of a trunk mat 10 obtained by the first embodiment of the present invention. The trunk mat 10 is a thin plate-like rug laid on the trunk floor 6 in the trunk room 5 of the automobile. The trunk mat 10 is a skin material laminated foamed resin molded product 8 in which a foamable resin molded into a thin plate shape having a substantially rectangular outline and a skin material made of a nonwoven fabric or the like laminated on the surface thereof are integrally molded. The main part is hereinafter referred to as a molded product 8).

  FIG. 2 is a schematic configuration diagram of the injection molding apparatus 1 for manufacturing the molded article 8 (one embodiment of the molding apparatus for the skin material laminated foamed resin molded article according to the present invention) centering on the mold structure. .

  The mold part 20 of the injection molding apparatus 1 includes a first mold 30, a second mold 40, and a third mold 50. The second mold 40 is a fixed mold, and the first mold 30 and the third mold 50 are movable molds. The first mold 30 is formed with an engraving 32 having a contour shape substantially the same as the contour shape of the molded product 8. The engraving depth is substantially equal to the final plate thickness (16 mm, preferably 12 to 24 mm) of the molded product 8.

  On the other hand, the second mold 40 is formed with a convex core 42 that can be fitted into the engraving 32. The contour shape of the core 42 is made smaller than the contour shape of the engraving 32 with a substantially constant width. The 1st type | mold 30 and the 2nd type | mold 40 are arrange | positioned so that the engraving 32 and the core 42 may oppose.

  For convenience of explanation, in the mold part 20, the protruding direction of the core 42 of the second mold 40 is the front, and the opposite side is the rear.

  The third mold 50 is a frame-shaped mold disposed between the first mold 30 and the second mold 40. That is, a window portion 52 penetrating in the front-rear direction is formed in the central portion of the third mold 50, and an edge portion 51 is configured so as to surround the window portion 52. The contour shape of the window 52 is substantially the same as the contour shape of the core 42, and the core 42 can be inserted in the front-rear direction with a slight gap (clearance).

  Of the edge portion 51, a portion having a predetermined width that particularly surrounds the window portion 52 is a cavity constituting edge portion 53. The surface of the cavity constituting edge 53 that faces the first mold 30 constitutes the rear surface of the cavity formed by mold clamping together with the front surface of the core 42 (see FIG. 4C).

  In the vicinity of the four corners of the edge 51, four rods 54 projecting rearward are provided. On the other hand, the second mold 40 is provided with four rod insertion holes 44 through which the rods 54 are slidably inserted. The third die 50 is moved by being guided by the sliding movement of the rod 54 with respect to the rod insertion hole 44.

  A mold moving means 80 for moving the first mold 30 and the third mold 50 back and forth (in the mold opening / closing direction) is provided. The mold moving means 80 includes a first mold moving means 82 for moving the first mold 30 and a third mold moving means 84 for moving the third mold 50 to make the first mold 30 and the third mold 50 independent of each other. To move. In FIG. 2, the first-type moving means 82 and the third-type moving means 84 are schematically shown as block bodies. Specifically, these are constituted by known mechanisms such as a hydraulic mechanism and a motor drive mechanism.

  Further, a mold / injection control unit 70 for controlling the operation of the mold moving means 80 is provided in order to cause the first mold 30 and the third mold 50 to perform predetermined movement operations in the mold clamping process and the mold opening process. . The mold / injection control unit 70 also controls the foaming resin injection operation of the injection unit 60 described later.

  An injection unit 60 (injection means) is connected to the rear of the second mold 40. The injection unit 60 is a known mechanism that melts the foamable resin, feeds it forward with a screw, injects it, and injects the foamable resin into the cavity. The foamable resin injected from the injection portion 60 is configured to be guided into the cavity through an injection passage 48 that penetrates the core 42 back and forth.

  In the present embodiment, a chemical foaming agent is used as a means for foaming the foamable resin, but the injection molding apparatus 1 is configured to be able to select to use a supercritical fluid (details will be described later). Therefore, a gas tank 75 that stores the supercritical fluid and a supercritical fluid control unit 72 that controls the supercritical fluid in the gas tank 75 to be appropriately supplied to the injection unit 60 are connected to the injection unit 60.

  As shown in FIG. 2, the mold part 20 is configured to hold the skin material 12 and the skin material 16. That is, the skin material 16 is attached to the first mold 30 and the skin material 12 is attached to the third mold 50 and held in the skin material setting step before clamping (see FIG. 3A).

  The surface of the edge 51 that faces the first mold 30 and is perpendicular to the mold opening / closing direction, that is, the front surface is a skin material holding surface 55. The skin material 12 is attached and held in a planar shape from the edge portion 51 to the window portion 52 along the skin material holding surface 55. An appropriate number of pins 56 (skin material holding means) projecting forward are provided on the skin material holding surface 55, and the skin material 12 is held (temporarily fixed) by abutment of the skin material 12 with the pins 56. ) An appropriate number of pins 46 protruding forward are also provided in the vicinity of the outer periphery of the front surface of the core 42 of the second mold 40 in the same manner as the pins 56.

  The fragile portion 14 is provided at a position corresponding to the boundary between the window portion 52 and the edge portion 51 in the state of being held on the skin material holding surface 55 of the skin material 12. The fragile portion 14 is a portion that is lower in strength than the surroundings or is likely to cause stress concentration, and is specifically formed by providing a perforation. The fragile portion 14 is provided along a predetermined separation line. The separation line in the present embodiment is along the contour shape of the window portion 52.

  As will be described later, the skin material 12 is configured to be cut at the fragile portion 14 before the start of the core back and separated into the skin material inner portion 12a and the skin material outer portion 12b. Further, a hole 15 for guiding the injected foamed resin into the cavity is provided at a position of the skin material 12 corresponding to the opening of the injection passage 48 of the second mold 40 in the set state.

As the material of the skin materials 12 and 16, the one on the front side of the molded article 8 (either the skin material 12 or the skin material 16) is provided with a non-woven fabric 300g / m ² and a polyethylene (PE) 100g / m ² backing. It is preferable that the side of the molded product 8 (the other of the skin material 12 or the skin material 16) be 200 g / m ^{2 of} nonwoven fabric.

  As the material of the other skin materials 12, 16, a breathable sheet, a breathable film or the like is suitable.

  Note that general-purpose polypropylene (PP) is used as the foamable resin used in the present embodiment. Specifically, it is preferable that the base and dilution are homo PP, or the base is homo PP and the dilution is block PP.

  Moreover, 20% of glass fibers (long fibers) are mixed in the foamable resin as reinforcing fibers. Instead of glass fiber, carbon fiber, nanofiber, fibrous or granular filler, natural fiber, or the like may be used.

  In addition, 3% of a color master batch is mixed for coloring.

  The chemical foaming agent is preliminarily mixed with the foamable resin in the injection section 60, and the amount thereof is 6% of the foamable resin (preferable range is 4 to 8%).

  Next, the molding process of the molded product 8 will be described. FIG. 3 is a diagram illustrating a process cycle for molding the molded product 8, where (a) is a state in which the skin material setting process is completed, (b) is a mold touch state during the mold clamping process, and (c) is a mold. The fastening process completion state, (d) shows the state during the injection process, (e) shows the core back completion state in the foamable resin process, and (f) shows the molded product removal state in the mold opening process. The white arrow shown between each state shows the order of a process.

  4 is an enlarged view of a part of the process shown in FIG. 3, and (a), (b), and (c) correspond to (b), (c), and (e) of FIG. 3, respectively. FIG.

  In the skin material setting step shown in FIG. 3 (a), the skin material 16 is set in the first mold 30 along the concave shape of the engraving 32 in the mold open state, and is held in close contact. For this purpose, for example, a vacuum suction device (not shown) may be used to vacuum-suck between the skin material 16 and the engraving 32.

  On the other hand, the skin material 12 is set from the edge portion 51 to the window portion 52 along the skin material holding surface 55 of the third mold 50. The skin material 12 is pierced and held by a pin 56 protruding from the skin material holding surface 55. As shown in the figure, when the skin material holding surface 55 and the front surface of the core 42 are flush with each other, the skin material 16 is also pierced and held by a pin 46 protruding from the front surface of the core 42 ( The front surface of the core 42 may be moved backward relative to the skin material holding surface 55 so that the pin 46 stabs the skin material 12 during the subsequent mold clamping process).

  In the subsequent mold clamping process, first, the first mold 30 is moved rearward and comes into contact with the third mold 50 through the skin materials 12 and 16 to enter the mold touch state (FIGS. 3B and 4A). ). At this point, a cavity 35 is formed which is a closed space surrounded by the engraving 32 of the first mold 30, the cavity constituting edge 53 of the third mold 50, and the front surface of the core 42 of the second mold 40. Each mold surface constituting the cavity 35 is covered with the skin material 12 or the skin material 16.

  After the mold touch, the first mold 30 and the third mold 50 are moved together in the direction of the second mold 40. As a result, the core 42 relatively enters the cavity 35. Accordingly, a shearing force acts on a portion of the skin material 12 that is in contact with the boundary between the skin material holding surface 55 and the window portion 52. Since the fragile portion 14 (see FIG. 1) is provided at the location where the shearing force acts, the skin material 12 automatically moves along the fragile portion 14 to the skin material inner portion 12a and the skin material outer portion 12b. Disconnected. By providing the fragile portion 14 in advance, the shear stress acting in the vicinity of the fragile portion 14 is concentrated on the fragile portion 14 and is easily separated by the fragile portion 14. That is, the separation position accuracy in the separation line provided with the fragile portion 14 is improved.

  The skin material inner portion 12 a is held by the pin 46 projecting from the front surface of the core 42 and enters the cavity 35, and the skin material outer portion 12 b is maintained in a state of being held along the skin material holding surface 55. (FIG. 3 (c), FIG. 4 (b)).

  At this time, the total actual area of the skin material inner portion 12a and the skin material outer portion 12b in the cavity 35 is equal to the projected area in the mold opening / closing direction. That is, by separating the skin material 12 into the skin material inner portion 12a and the skin material outer portion 12b, the slope portion 12c shown in FIG. 10 (b) seen in the conventional method is not formed.

  In the state of FIG. 4B in which the core 42 has entered most into the cavity 35, the distance (basic plate thickness) between the front surface of the core 42 and the bottom surface of the first mold 30 is 4 mm with respect to the final plate thickness of 16 mm. It is. In addition, the suitable range of basic board thickness is 3-6 mm with respect to final board thickness 12-24mm.

  In the subsequent injection step, the foamable resin 92 is injected from the injection portion 60 and injected into the cavity 35 (FIG. 3D). The injection amount of the foamable resin 92 is the same as the volume of the cavity 35. In anticipation of foaming, a short shot in which the injection amount is smaller than the volume of the cavity 35 may be performed. The preferred value for short shot is 0-8%.

  Immediately after the injection step, a foaming step with a core back is performed (FIGS. 3E and 4C). The amount of separation between the first mold 30 and the second mold 40 during the core back is equal to the amount of entry from the skin material holding surface 55 of the core 42 into the cavity 35 in the mold clamping process. That is, after the core back, the front surface of the core 42 is flush with the skin material holding surface 55 again. Accordingly, the skin material inner portion 12a and the skin material outer portion 12b (FIG. 4B) once separated become the skin material 12 forming the same surface again (FIG. 4C). At this time, since there is no difference between the actual area of the skin material 12 and the projected area in the mold opening / closing direction, the slack portion 12d as shown in FIG. 10C does not occur. Therefore, in the molded product 8, it can suppress effectively that wrinkles generate | occur | produce in the skin material 12. FIG.

  Moreover, since the skin material 12 becomes a continuous surface, a discontinuous surface due to a step is not generated at the separation portion, and a good appearance can be obtained.

  Since the volume of the cavity 35 is increased by performing the core back, foaming is promoted and a resin molded body 90 having a high foaming rate can be obtained. The foaming rate of the resin molded body 90 is not uniform and varies depending on the part. That is, since a large volume expansion is performed at a position corresponding to the core 42 in the mold opening / closing direction, a high expansion ratio portion 96 (represented schematically by a circle in FIG. 4C) having a relatively high expansion ratio. On the other hand, a solid portion 94 having a relatively low foaming rate is formed at a location close to the mold surface or at a location corresponding to the cavity constituting edge 53 as viewed in the mold opening / closing direction (in FIG. 4C). Schematically shown with cross-hatching). By providing the cavity constituting edge 53, the solid portion 94 includes a low foaming skin layer formed in the vicinity of the mold surface of the first mold 30. This effectively suppresses the deterioration of formability and the decrease in the overall rigidity due to the forced expansion of the volume of the skin layer that originally has a low foaming rate.

  In particular, in the high expansion ratio portion 96, a spring back phenomenon occurs in the glass fiber contained in the foamable resin 92. The spring back phenomenon means that when the foamable resin 92 is filled, the glass fiber axes are aligned in the flow direction of the molten resin (in this embodiment, the direction substantially perpendicular to the mold opening / closing direction), but foaming is performed by the core back. This is a phenomenon in which the glass fiber rises in the mold opening / closing direction. Due to the springback phenomenon, the physical properties of the molded product such as rigidity can be enhanced while further promoting foaming. In addition to glass fiber, when carbon fiber, nanofiber, or the like is selected, the effect of this springback phenomenon can be obtained.

  After the foaming / molding is completed and predetermined cooling is performed, the first mold 30 is separated from the second mold 40 and the third mold 50 in the mold opening process (FIG. 3F). Then, the molded product 8 in which the skin materials 12 and 16 are laminated on the surface of the resin molded body 90 is taken out.

  Thereafter, the process proceeds again to the skin material setting step (FIG. 3A), and the above cycle is repeated.

  By the process cycle as described above, it is possible to obtain a molded article 8 having a good appearance that is free from wrinkles due to the slackness of the skin material 12 during the core back. In particular, since the skin material 12 is cut off in the mold clamping process, the skin material 12 that has not been cut off from the edge 51 to the window 52 along the skin material holding surface 55 in the skin material setting process. Just hold it. In other words, the setting property of the skin material can be maintained satisfactorily because only one set operation is required.

  Moreover, since the skin material 12 is separated by the shearing force when the core 42 passes through the window portion 52 in the mold clamping process, a separate cutter or cutter driving means for separating the skin material 12, Alternatively, automatic separation can be realized with a simple configuration without using the control means or the like.

  FIG. 5 is a diagram showing a second embodiment of the present invention, and (a), (b), and (c) are partially enlarged views corresponding to (b), (c), and (e) of FIG. 3, respectively. It is. This embodiment differs from the first embodiment only in the shape of the mold, and the other configurations are the same. 5 and subsequent figures, members having the same or the same functions as those in FIGS. 1 to 4 are denoted by the same reference numerals, and redundant description thereof is omitted.

  This embodiment is different from the first embodiment in that the contours of the core 42a and the window 52a are substantially the same as the contour of the engraving 32. That is, the edge 51a does not have a portion corresponding to the cavity constituting edge 53 in the first embodiment. For this reason, as shown in FIG. 5C, the solid portion 94 is thinned. Therefore, it is preferable to apply when the influence of the skin layer is not a problem. Since the proportion of the high expansion ratio portion 96 occupying the resin molded body 90 increases as the solid portion 94 becomes thinner, there is an advantage that the overall expansion ratio can be increased.

  FIG. 6 is a diagram showing a third embodiment of the present invention, wherein (a), (b), and (c) are partially enlarged views corresponding to (c), (d), and (e) of FIG. 3, respectively. It is. This embodiment has the same structure as that of the first embodiment including the mold structure, but the cut-off form of the skin material 12 is different. In other words, the skin material 12 is automatically separated in the injection process.

  At the time of completion of the mold clamping process shown in FIG. 6A, the skin material inner portion 12a and the skin material outer portion 12b are not yet separated, and the slope portion 12c that connects the steps between them in a slope shape is formed. Yes. Accordingly, the actual area of the skin material 12 at this time is larger than the projected area in the mold opening / closing direction.

  Then, the foamable resin 92 is injected into the cavity 35 in the subsequent injection process. The filling pressure at that time increases the internal pressure of the cavity 35 and presses the inclined surface portion 12c outward. The skin material 12 is automatically separated along the fragile portion 14 (see FIG. 1) by the pressing force. By this separation, the inclined surface portion 12c is in close contact with the edge portion 51, and the surplus portion (corresponding to the area increase) is in close contact with the side surface portion of the core 42 (FIG. 6B). The volume of the cavity 35 is expanded by the separation of the skin material 12, and the expanded cavity 92 is filled in the expanded cavity 35.

  Although the core back is made in the subsequent foaming process, since the skin material 12 has already been separated at this point, the skin material 12 does not sag due to the core back. In the state after foaming (FIG. 6C), the area increase of the slope portion 12c is buried in the resin molded body 90, so that it does not appear as wrinkles on the surface. Further, since the cut end of the inclined surface portion 12c is hidden inside the resin molded body 90, a better appearance can be obtained.

  In order to smoothly perform the above process, the strength of the fragile portion 14 is not separated by the shearing force when the core 42 passes through the window portion 52, but is separated by the filling pressure of the foamable resin 92. Adjust to the extent you want.

  Also in this embodiment, as in the first embodiment, it is possible to obtain a good setting property in the skin material setting step, and a separate cutter or cutter driving means for separating the skin material 12 or its control means. Thus, automatic separation can be realized with a simple configuration without using the above.

  FIG. 7 is a diagram showing a fourth embodiment of the present invention. (A), (b), and (c) are partially enlarged views corresponding to (b), (c), and (e) of FIG. 3, respectively. It is. This embodiment differs from the first embodiment in the setting position of the skin material 12.

  In the present embodiment, the pin 56a erected on the third mold 50b is provided on the second mold 40 side. That is, the skin material holding surface 55b of the third mold 50b is formed on the second mold 40 side. In the skin material setting step, the skin material 12 is held along the skin material holding surface 55b (FIG. 7A).

  In the mold clamping process, the skin material 12 is separated into the skin material inner portion 12a and the skin material outer portion 12b by the shearing force when the core 42 enters the window portion 52 (FIG. 7B). Even if it does in this way, like the first embodiment, it is possible to obtain a good setting property in the skin material setting step, and a separate cutter for cutting off the skin material 12, a cutter driving means, or its control means Thus, automatic separation can be realized with a simple configuration without using the above.

  In addition, as shown in FIG.7 (c), the location which faces the cavity structure edge part 53 of the resin molding 90 is not covered with the skin material 12. FIG. To cover this portion with the skin material 12, after the molded product 8 is taken out, the remaining skin material 16 (the portion sandwiched between the first mold 30 and the edge portion 51) on the outside of the resin molded body 90 is placed inside. Folding may be performed separately using an adhesive or the like.

  FIG. 8 is a view showing a fifth embodiment of the present invention, and (a), (b), and (c) are partially enlarged views corresponding to (b), (c), and (e) of FIG. 3, respectively. It is. This embodiment differs from the first embodiment in the form of holding the skin material 12.

  In the present embodiment, the third mold 50 is divided into two layers of an edge portion 51c and an edge portion 51d. And it is comprised so that the skin material 12 may be hold | maintained via the spring 58 (skin material holding means) along the skin material holding surface 55c, 55d formed in the meantime (FIG. 8 (a)).

  Then, in the mold clamping process, the skin material 12 is separated into the skin material inner portion 12a and the skin material outer portion 12b by a shearing force when the core 42 passes through the window portion 52d and enters the window portion 52c (FIG. 8B). )). Even if it does in this way, like the first embodiment, it is possible to obtain a good setting property in the skin material setting step, and a separate cutter for cutting off the skin material 12, a cutter driving means, or its control means Thus, automatic separation can be realized with a simple configuration without using the above.

  In this embodiment, since the shearing force acts in a state where the skin material 12 is regulated from both the front and back surfaces, there is an advantage that it is easy to perform better separation.

  FIG. 9 is a view showing a sixth embodiment of the present invention, and (a) and (b) are enlarged views corresponding to (b) and (c) of FIG. 3, respectively. However, since the configuration on the first mold 30 side is the same as that of the first embodiment, it is omitted. This embodiment differs from the first embodiment in the structure of the third mold 50e.

  In the present embodiment, the third mold 50e is configured to surround the second mold 40 in a box shape. The rear surface of the second mold 40 and the inner surface of the third mold 50e are connected by a rod 54a. By varying the length of the rod 54a, the second mold 40 and the third mold 50e can be moved relative to each other, and the amount of protrusion of the core 42 from the skin material holding surface 55e can be varied.

The embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the invention described in the claims. For example, as a means for foaming the foamable resin 92, a supercritical fluid may be used instead of or in addition to the chemical foaming agent. A supercritical fluid is a known fluid that is in a supercritical state at a predetermined critical temperature or higher and a critical pressure or higher. The kind of supercritical fluid used in this embodiment is an inert gas, preferably carbon dioxide (CO ₂ ) or nitrogen (N ₂ ). A supercritical fluid has a fluidity of a gas while having a density close to that of a liquid. The critical temperature of CO ₂ is 31 ° C., and the critical pressure is 7.4 MPa. N _{2 has} a critical temperature of −147 ° C. and a critical pressure of 3.4 MPa.

  When the supercritical fluid is mixed in advance with the foamable resin, the supercritical fluid is stored in the gas tank 75 shown in FIG. 2 and the supercritical fluid is sent to the injection unit 60 via the supercritical fluid control unit 72. You can do it.

  When a supercritical fluid is mixed with the foamable resin 92, it actively moves in the molten resin during foaming and diffuses deep into the molecule, so that a finer and more uniform foamed cell structure is formed, and the rigidity of the resin molded body 90 is increased. The physical properties such as can be improved.

  In the above embodiment, the second mold 40 is a fixed mold, and the first mold 30 and the third mold 50 are movable molds. However, the present invention is not limited to this. For example, the first mold 30 is a fixed mold, The second mold 40 and the third mold 50 may be movable. Alternatively, the injection unit 60 may be provided on the first mold 30 side so that the foamable resin 92 injected from the injection unit 60 is injected into the cavity 35 through the inside of the first mold 30.

It is a perspective view which shows the usage type of the trunk mat obtained by 1st Embodiment of this invention. It is a schematic apparatus block diagram centering on a type | mold structure of the injection molding apparatus for manufacturing the skin material laminated foamed resin molded product which is a main structural member of the trunk mat shown in FIG. It is a figure which shows the process cycle for shape | molding a skin material laminated foamed resin molded product, Comprising: (a) is a skin material setting process completion state, (b) is the type | mold touch state in a mold clamping process, (c) is a type | mold. The fastening process completion state, (d) shows the state during the injection process, (e) shows the core back completion state in the foamable resin process, and (f) shows the molded product removal state in the mold opening process. It is a figure which expands and shows a part of process shown in FIG. 3, (a), (b), (c) is the elements on larger scale corresponding to (b), (c), (e) of FIG. 3, respectively. It is. It is a figure which shows 2nd Embodiment of this invention, (a), (b), (c) is the elements on larger scale corresponding to (b), (c), (e) of FIG. 3, respectively. It is a figure which shows 3rd Embodiment of this invention, (a), (b), (c) is the elements on larger scale corresponding to (c), (d), (e) of FIG. 3, respectively. It is a figure which shows 4th Embodiment of this invention, (a), (b), (c) is the elements on larger scale corresponding to (b), (c), (e) of FIG. 3, respectively. It is a figure which shows 5th Embodiment of this invention, (a), (b), (c) is the elements on larger scale corresponding to (b), (c), (e) of FIG. 3, respectively. It is a figure which shows 6th Embodiment of this invention, (a), (b) is an enlarged view corresponding to (b), (c) of FIG. 3, respectively. It is a figure which shows the shaping | molding process of the prior art by the injection molding apparatus at the time of using together the core back shaping | molding which used the frame-shaped type | mold for skin material lamination | stacking shaping | molding, (a) is the type | mold touch state in the middle of a clamping process, (b ) Shows a state where the mold clamping process is completed, and (c) shows a state where the core back in the foaming process is completed.

Explanation of symbols

1 Injection molding equipment (molding equipment for skin material laminated foamed resin moldings)
8 Skin material laminated foamed resin molded product 12 Skin material 12a Inner part of skin material (the part that is pushed into the cavity after separation of the skin material)
12b Outer part of the skin material (the part that is held along the skin material holding surface after the skin material is cut off)
12c Slope part 14 Fragile part 30 1st type | mold 32 Engraving 35 Cavity 40 2nd type | mold 42 Core 50, 50a, 50b, 50c, 50e 3rd type | mold 51,51a, 51b, 51c, 51d, 51e Edge part 52,52a, 52c, 52d Window 53 Cavity component edge 55, 55a, 55b, 55e Skin material holding surface 56, 56a Pin (skin material holding means)
58 Spring (skin material holding means)
60 Injection part (injection means)
80 type moving means 92 Foamable resin

Claims (15)

A first mold having a concave engraving, a second mold having a convex core, and a frame-shaped third mold in which a window portion having substantially the same shape as the outer periphery of the core is formed by the edge portion; While facing the core, and arranged so that the core is inserted through the window by clamping,
The skin material is held from the edge portion to the window portion along the skin material holding surface of the third die, which is substantially perpendicular to the mold opening / closing direction, which is the relative movement direction of the first die and the second die. And
While the first mold, the second mold, and the third mold are clamped to form a cavity, the skin material applied to the window portion is placed on the front side of the core on the inside of the cavity from the skin material holding surface. Indent,
Injecting foamable resin into the formed cavity,
In the molding method of the skin material laminated foamed resin molded article in which the foaming resin is foamed in the cavity while performing the core back to expand the cavity volume by separating the first mold and the second mold,
After the mold clamping start time and before the core back start time, the portion pushed into the cavity inside the skin material and the portion held along the skin material holding surface are automatically separated. A method for molding a skin material laminated foamed resin molded product characterized by the above. At least the vicinity of the window part of the edge part is a cavity constituting edge part of a mold surface constituting the cavity,
2. The skin material laminated foamed resin according to claim 1, wherein a foaming rate of the foamable resin corresponding to the cavity constituting edge in a mold opening / closing direction is lower than a foaming rate of the foamable resin corresponding to the core. Molding method for molded products. The above-mentioned skin material is automatically cut during the mold clamping,
The skin material is held in a state where it is in contact with the boundary between the skin material holding surface and the window portion, and when the front surface of the core passes through the window portion, a shearing force acting on a location in contact with the boundary is used. 3. The method for molding a skin material laminated foamed resin molding according to claim 1 or 2, wherein the skin material is automatically separated. The automatic separation of the skin material is performed during the injection of the foamable resin,
At the time of completion of the mold clamping, a slope portion is formed on the skin material to connect the step between the portion held along the skin material holding surface and the portion pushed into the cavity into a slope shape. And
The molding of the skin material laminated foamed resin molded product according to claim 2, wherein the skin material is automatically separated at the slope portion by a filling pressure when the foamable resin is injected. Method.   The amount of separation between the first mold and the second mold in the core back is substantially equal to the amount of approach from the skin material holding surface on the front surface of the core to the cavity side at the time of clamping. The molding method of the skin material laminated foamed resin molded product according to any one of claims 1 to 4.   The skin material laminated foamed resin according to any one of claims 1 to 5, wherein a separation line is set in the skin material, and a fragile portion is formed in advance along the separation line. Molding method for molded products.   The method for molding a skin material laminated foamed resin molding according to any one of claims 1 to 6, wherein the foamable resin contains reinforcing fibers in advance.   The method for molding a skin material laminated foamed resin molding according to any one of claims 1 to 7, wherein the foamable resin contains a supercritical fluid in advance. A first mold having a concave engraving;
A second mold having a convex core facing the engraving,
A frame-shaped third mold that is substantially the same shape as the outer peripheral shape of the core and in which the window portion through which the core is inserted is formed by an edge portion;
Mold moving means for relatively moving at least the first mold and the second mold in the mold opening and closing direction across the third mold;
A skin holding means for holding the skin material from the edge portion to the window portion along the third type skin material holding surface substantially perpendicular to the mold opening and closing direction;
An injection means for injecting a foamable resin into the cavity,
The mold moving means clamps the first mold, the second mold, and the third mold holding the skin material to form a cavity, and the skin material applied to the window portion is placed on the front surface of the core. Then, the inside of the cavity is pushed into the cavity from the skin material holding surface, and then the injecting means injects a foamable resin into the cavity. Further, during the subsequent foaming, the mold moving means has the first mold and the first mold. In a molding apparatus for skin material laminated foamed resin molded article that performs core back to increase the cavity volume by separating two molds,
After the mold clamping start time and before the core back start time, the portion pushed into the cavity inside the skin material and the portion held along the skin material holding surface are automatically separated. It is comprised as follows. The shaping | molding apparatus of the skin material laminated foamed resin molded product characterized by the above-mentioned. At least the vicinity of the window part of the edge part is a cavity constituting edge part of a mold surface constituting the cavity,
10. The skin material-laminated foamed resin according to claim 9, wherein a foaming rate of the foamable resin corresponding to the cavity constituting edge in a mold opening / closing direction is lower than a foaming rate of the foamable resin corresponding to the core. Molding device. The above-mentioned skin material is automatically cut during the mold clamping,
The skin material is held in contact with a boundary portion between the skin material holding surface and the window portion, and the skin is applied by a shearing force acting on the boundary portion when the front surface of the core passes through the window portion. 11. The apparatus for molding a skin material laminated foamed resin molded article according to claim 9 or 10, wherein the material is automatically separated. The automatic separation of the skin material is performed during the injection of the foamable resin,
At the time of completion of the mold clamping, a slope portion is formed on the skin material to connect the step between the portion held along the skin material holding surface and the portion pushed into the cavity into a slope shape. And
The molding of a skin material laminated foamed resin molded product according to claim 10, wherein the skin material is automatically separated at the slope portion by a filling pressure when the foamable resin is injected. apparatus.   The amount of separation between the first mold and the second mold in the core back is substantially equal to the amount of approach from the skin material holding surface on the front surface of the core to the cavity side at the time of clamping. The shaping | molding apparatus of the skin material laminated | stacked foaming resin molding of any one of Claim 9 thru | or 12.   The molding apparatus for a skin material laminated foamed resin molded product according to any one of claims 9 to 13, wherein the foamable resin contains reinforcing fibers in advance.   15. The molding apparatus for a skin material laminated foamed resin molded product according to any one of claims 9 to 14, wherein the foamable resin contains a supercritical fluid in advance.

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