JPH1119957A - Stamping molding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manufacture a synthetic resin product having satisfactory external appearance with different colors or patterns on its surface at a parting line as a boundary by one time stamping molding by one molding machine. SOLUTION: A lower mold 10 of the stamping molding machine is separated into two half parts 10a, 10b at a vertical separating surface P corresponding to a parting line of a synthetic resin product. The parts 10a, 10b are reciprocated to be moved to approach to one another or separate from one another by an actuator 17, and formed with cut protrusions 13a, 13b brought into contact with a pair of opposed surfaces 12a, 12b at a predetermined interval along the separating surface at the most approached positions. Die heads 34, 39 extrude sheet-like melted resins 30m, 35m having different colors or patterns on surfaces and are supplied so that the surfaces of the resins become upside to cover the upper surfaces of the parts 10a, 10b. Then, the parts 10a, 10b are moved to the most approached positions, and an upper mold 20 is approached from above to the half parts to mold the respective melted resins.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stamping molding apparatus for producing a synthetic resin product having a different surface color or pattern at a predetermined parting line.

[0002]

2. Description of the Related Art For example, in the case of a plate-shaped synthetic resin product such as an automobile door trim, if the upper half and the lower half have different surface colors or patterns in order to enhance the decorativeness, it is common to use such a material. Is prepared by molding the upper half and the lower half separately to prepare a different skin color or pattern, and then integrating them by caulking or the like. When producing a plate-like synthetic resin product by suctioning and bonding a skin material heated and softened to the surface of the integrally formed base material by a negative pressure, the upper half of the product is separated by a parting line. It is also conceivable to use a skin material having a different surface color or pattern between the lower half and the lower half.

[0003]

However, the first problem is to be solved.
In the prior art, there is a problem in that the forming process is required separately for the upper half and the lower half, and the assembling process is also required, so that the manufacturing cost increases. Further, in the second prior art, although the manufacturing cost is reduced, the skin material is displaced along the surface of the base material at the time of suction, so that there is a problem that a parting line shape is distorted and it is hard to see, and in addition, the surface material is flat. Because the surface of the door trim is merely color-coded or patterned, it cannot give a luxurious feel.

An object of the present invention is to solve the above-mentioned problems by enabling a synthetic resin product having a different surface color or pattern to be integrally formed by stamping molding at such a parting line. I do.

[0005]

According to the present invention, there is provided a lower mold having a rear molding surface formed on an upper side, and a gap between the lower molding surface, which is provided on the lower mold so as to be able to approach and separate from above, and is provided at the closest position. The present invention relates to a stamping molding apparatus for producing a synthetic resin product having a different surface color or pattern with a predetermined parting line as a boundary, the upper die having an upper mold having a front molding surface formed on a lower surface having a predetermined value. It consists of two halves that can be separated horizontally from each other with a vertical separation plane corresponding to the parting line, and each of these halves is located at the closest position along the separation plane and at a predetermined distance with the separation plane therebetween. An actuator for forming a pair of opposing surfaces facing each other, and for reciprocating at least one of the halves in the horizontal direction so that the halves are approached and separated from each other, and an opposing surface of each half at the closest position. Between Extrude each sheet-like molten resin with a thickness of the tip part larger than half of the interval and a different surface color or pattern, so that the surface of each molten resin is on the upper side and covers the upper surface of each half. A die head is provided.

First, the upper mold is separated upward from the lower mold,
With the lower mold halves separated from each other in the horizontal direction, each sheet-shaped molten resin having a different surface color or pattern is extruded from each die head, and the upper surface covers the upper surface of each half. Supply as follows. Then, the respective halves of the lower mold are moved to each other by the operating device to be the closest positions,
After the front end corresponding to the parting line of each molten resin is connected to each other by sandwiching it between the opposing surfaces, if the upper die is brought closer to the closest position to the lower die, each molten resin will be Filled and molded. The color of the surface of the molded synthetic resin product is different in color or pattern from the boundary of the joining part of each molten resin corresponding to the parting line.

It is desirable that a thin partition plate be integrally provided on the upper mold so as to protrude from the front-side molding surface toward the lower mold in correspondence with the separation surface. The movement of the surface portion of the molten resin is blocked by the partition plate.

It is preferable that each half of the lower mold is provided with a cutting projection which projects in a direction approaching each other along the lower edge of each opposing surface and whose leading edges contact each other at the closest position of both halves. . With this configuration, by moving each half to the closest position, the excess molten resin at the joint portion along the parting line is cut by the cutting protrusion.

It is desirable that each die head extrudes, as each molten resin, a laminate of a base molten resin layer and a skin molten resin layer each having a predetermined thickness.

Further, each die head is used as each molten resin,
It is desirable to extrude a laminate of the intermediate molten resin layer and the skin molten resin layer each having a predetermined thickness of the base molten resin layer and the foaming agent kneaded. In this case, the intermediate molten resin layer is foamed and filled between the upper mold and the lower mold after the upper mold and the lower mold are set at the closest positions.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 5 shows the lower and upper halves of a base material 31 and 36 integrally joined at a parting line C in different colors via intermediate foam layers 32 and 37, respectively. FIGS. 1 to 4 show sectional views of a door trim which is covered with the outer skin 33 and the outer skin 38 and thus has different surface colors on the parting line C. FIGS. 1 shows a cross-sectional view of a stamping molding apparatus when the present invention is applied. For example, the vertical and horizontal dimensions are about 600mm
In the case of a door trim of × 900 mm, the thickness of each part is
1, 36 is 2.5 to 4.0 mm, intermediate foam layers 32 and 37 are 1.0 to 3.0 mm, and skins 33 and 38 are 0.3 to 1.0 m.
m, 3.8 to 8.0 mm for the entire door trim. This stamping molding apparatus includes a lower mold 10 and an upper mold 20 attached to a lower fixed mold support member and an upper movable mold support member (both not shown) via platens 16 and 26, respectively. 30m and 35m of sheet-like molten resin respectively
And two sets of die heads 34 and 39 for extruding and supplying the die.

As shown in FIGS. 1 to 4, the lower mold 10 is separated into two halves 10a and 10b by a vertical separation plane P corresponding to the parting line C of the door trim, and the first half 10a is fixed. The second half 10 b is fixed to the plate 16, and is guided and supported on the platen 16 so as to be able to reciprocate in a horizontal direction orthogonal to the separation plane P. The second half 10b is separated from the first half 10a by a hydraulic cylinder device (actuator) 17 provided on a surface plate 16 (see FIG. 1). Contact surfaces 19a, 1 formed at the lower part
9b are reciprocated between the closest positions where they come into contact with each other (see FIGS. 2 to 4). In the closest position, both halves 10
a, 15b, outwardly facing steps 15a, 15
b corresponds to the planar contour of the door trim to be molded.

On the upper side of the first half 10a of the lower mold 10, a first back molding surface 11a having a shape corresponding to the back of the lower half of the door trim shown in FIG. 5 is formed, and the second half 10b is formed. A second rear molding surface 11b having a shape corresponding to the rear surface of the upper half of the door trim is formed on the upper side, and both rear molding surfaces 11a, 11 of both halves 10a, 10b approached to the closest position.
As a result, the rear molding surface 11 for molding the lower surfaces of the base materials 31 and 36 of the door trim is formed. A pair of opposing surfaces that face each other along the separation surface P with the two halves 10a and 10b at the closest positions are provided at a predetermined distance from each other on the back side molding surfaces 11a and 11b. 1
2a and 12b are formed. This interval is a value slightly smaller than the sum of the thicknesses of the leading ends of the sheet-like molten resins 30 m and 35 m extruded from the die heads 34 and 39, respectively. Each of the halves 10a, 10b protrudes in a direction approaching each other along the lower edge of each of the opposed surfaces 12a, 12b, and has cutting edges 13a, 13b are provided, and each of the cutting projections 13a, 13b and its lower contact surface 19a, 19b are provided.
During b (described above), it is excavated at a depth greater than the thickness of the substrate molten resin layer 31m.

Each of the halves 10a, 10b of the lower mold 10 has a cavity 14a1, 14b1 formed therein.
And each of the cavities 14a1 and 14b1 and each back side molding surface 1
Numerous intake holes 1 formed between 1a and 11b
4a2, 14b2 (only a part is shown in the figure), and each intake port 14a opened to each cavity 14a1, 14b1
Suction passages 14a, 14b are formed, and each intake port 14a3, 14b3 is connected to a vacuum source 18, which is common to both halves 10a, 10b comprising a vacuum pump, a vacuum tank, and an on-off valve.

The upper mold 20 can be approached and separated from the lower mold 10 from above, FIG. 1 shows a separated state, FIG. 2 shows a state approaching halfway, and FIGS. 3 and 4 show a closest position. .
On the lower surface of the upper mold 20, a front molding surface 2 for molding the surfaces of the skins 33 and 38 covering the surface of the door trim shown in FIG.
1 is formed. As shown in FIGS. 3 and 4, each half 10a, 10b of the lower die 10 is set to the closest position,
0 is lowered to the closest position to the lower mold 10, and the inward step 23 formed on the upper mold 20 along the outer periphery of the front molding surface 21 is separated from the lower mold 10 by a slight gap. The back mold surfaces 11a and 11b of the lower mold 10 and the front mold surface 21 of the upper mold 20 can be fitted to the outward step portions 15a and 15b.
Is the total thickness of the door trim. The front molding surface 21 is a thin plate (having a thickness of, for example, 1 to 2 mm) from directly above along a position corresponding to the parting line C of the door trim to be molded (therefore, the separation surface P of the lower mold 10). A partition plate 22 whose shape is straight or slightly bent is implanted and fixed so as to protrude toward the lower mold 10 by a predetermined distance.

As shown in FIG.
Each half 1 of the lower mold 10 in a state where 0 is separated upward.
Two sets of die heads 34 and 39 projecting and moving upwards 0a and 10b, respectively, and three supply units each supplying a molten resin material serving as base materials 31 and 36, intermediate foam layers 32 and 37 and skins 33 and 38 thereto. Tubes 34b and 39b (FIG. 1 shows only one each) are provided. Each of the molten resin materials is a polyolefin-based synthetic resin, and the intermediate foamed layers 32, 3
The blowing agent kneaded with the molten resin material of No. 7 is an azodicarbonamide-based one. Each base material molten resin layer 31m and 36m
The molten resin materials of the intermediate molten resin layers 32m and 37m may be the same, but the molten resin materials used for the skin molten resin layers 33m and 38m have different colors.

Next, the operation of the above embodiment will be described. First, in the molten resin supply step, the upper die 20 is separated upward as shown in FIG.
0b are separated from the first half 10a by the hydraulic cylinder device 17 at positions separated from the first half 10a by the base material molten resin layers 31m and 36m forming the base materials 31 and 36, the intermediate foam layers 32 and 37, and the skins 33 and 38, respectively. Intermediate molten resin layer 32m, 37m
The outer molten resin layers 33m and 38m are melted by separate extruders, and the intermediate molten resin layers 32m and 37m are kneaded with a foaming agent. Extrusion port 34
a, 39a from sheet-like molten resin 30m, 3 respectively
The three layers are extruded at a temperature of 110 ° C. to 210 ° C. as 5 m. In the case of a door trim of about 600 mm × 900 mm in length and width, the width of each molten resin 30 m, 35 m is 950 to 1
000 mm, which is slightly larger than the width of the door trim 10. In the illustrated die heads 34 and 39, the base molten resin layers 31m and 36m, the intermediate molten resin layers 32m and 37m, and the skin molten resin layers 33m and 38m are connected to the respective extrusion ports 34a and 3m.
Each molten resin 30 in the form of a three-layer sheet joined immediately before 9a
m, 35m, but each die head 3
Nos. 4 and 39 have independent slit-shaped extrusion ports formed close to each other for each molten resin layer, and after extrusion, each of the base material molten resin layers 31m and 36m and the intermediate molten resin layers 32m and 37 are formed.
m and the skin molten resin layer 33m, 38m are joined to form a lower mold 1
It may be provided on each of the 0 halves 10a, 10b.

Each die head 34, 3 is extruded while extruding a three-layer sheet-like molten resin 30m, 35m laminated on each other.
9 is moved in the horizontal direction orthogonal to the extrusion ports 34a and 39a, so that the molten resin 30m is
With the m-side facing down, almost the entire upper half of the first half 10a of the lower mold 10, that is, the first back side molding surface 11a, the cutting protrusion 13a on one side thereof, and most of the remaining outwardly facing step 15a on the outer periphery. Is supplied so as to cover the second half 10 of the lower mold 10 with the base resin molten resin layer 36m side down.
b, ie, the second back side molding surface 11b, the cutting protrusion 11b on one side thereof, and the remaining outwardly facing step 15
is supplied so as to cover most of b.

At the time of extruding the three layers, the intermediate molten resin layers 32m and 37m and the skin molten resin layers 33m and 38m
extruding timing of each base material molten resin layer 31m, 3
6 m, the tip of each molten resin 30 m, 35 m is only the base resin molten resin layer 31 m, 31 m, and each die head 34, 39 directs each molten resin 30 m, 35 m outward from each cutting protrusion 13 a, 13 b side. It is supplied toward the steps 15a and 15b. As a result, as shown in FIG. 1, each of the cutting protrusions 13a and 13b is covered with each of the base material molten resin layers 31.
m, 36 m, and each intermediate molten resin layer 32 m, 37 m
m and each of the skin molten resin layers 33 m and 38 m
The rear molding surfaces 11a and 11b come to be covered from the middle of a and 12b. Since each of the molten resins 30m and 35m is in a semi-molten state that is not cut by its own weight and is rich in plasticity, as shown in FIG. 1 by a solid line and a two-dot chain line, it almost follows each of the back side molding surfaces 11a and 11b. It is deformed into a shape, and its peripheral part is each cutting projection 13a, 13b and each outward step part 15a,
It is almost adhered to around 15b.

In the joining step following the molten resin supply step, as shown in FIG. 2, the second half 10b is moved closer to the first half 10a by the hydraulic cylinder device 17 to be the closest position. Thereby, the portions corresponding to the parting line C of the base resin molten resin layers 31m and 36m of the respective molten resins 30m and 35m are directly sandwiched between the opposing surfaces 12a and 12b of the respective halves 10a and 10b. Bonded to the intermediate molten resin layer 3
The 2 m, 37 m and the skin molten resin layers 33 m, 38 m are also integrally joined. At the same time, each of the opposing surfaces 12a, 12a
Since the leading edges of the cutting projections 13a and 13b provided along the lower edge of the b are in contact with each other, the unnecessary base material molten resin layers 31m and 36m located below the cutting projections 13a and 13b are separated from the cutting projections 13a and 13m.
b.

In the suction contact step following the bonding step, the lower mold 1
0 each suction passage 14 formed in each half 10a, 10b
a, 14b is supplied with a negative pressure from the vacuum source 18, and each molten resin 30m, 35m is passed through a number of intake holes 14a2, 14b2.
a. This makes each molten resin 30m, 35m
Is a back side molding surface 11 of the upper surface of the lower mold 10 as shown in FIG.
a and 11b are completely adhered to the entire surface. During this suction contact process, the two die heads 34 and 39 are completely retracted outward from above the lower mold 10.

In the mold clamping process following the suction contact process, the upper mold 20 is lowered toward the lower mold 10, and the distance between each of the back molding surfaces 11 a and 11 b of the lower mold 10 and the front molding surface 21 of the upper mold 20 is reduced. Reaches the closest position where the predetermined value is larger than the thickness of the molten resin 30m, 35m, the lowering of the upper mold 20 is stopped. As shown in FIG. 3, at the closest position, gaps S1 and S2 remain between the front molding surface 21 and the surfaces of the skin molten resin layers 33m and 38m. It is pushed into the V-shaped concave portion on the upper part of the joint between the skin molten resin layers 33m and 38m. In the middle of the mold clamping process, the inward step 23 of the upper mold 20 is fitted with the outward step 15a, 15b of the lower mold 10, whereby the outward step 15 is formed.
a, 30m, 35 of molten resin protruding outside from 15b
Unnecessary portions of m are cut off by the shearing action of the two steps that fit together. In addition, as for such a step portion used for cutting unnecessary portions of the molten resin 30m and 35m, the lower die 10 side may be an outward step portion and the upper die 20 side may be an outward step portion. Alternatively, instead of such shearing by the stepped portions fitted to each other, a pressing blade provided downward along the outside of the front molding surface 21 of the upper die 20 is pressed against the flat surface of the outer periphery of the lower die 10. It may be.

In the foaming step following the mold clamping step, the lower mold 10
The molding surfaces 11 and 21 are set at 130 ° C. to 2 ° C. by heaters (not shown) provided on the two halves 10 a and 10 b and the upper mold 20.
It is heated to 50 ° C. (for example, both molding surfaces 11 and 21 are 13
0 ° C.), whereby the foaming agent in each of the intermediate molten resin layers 32m and 37m is thermally decomposed to generate an inert gas such as nitrogen gas, and foaming is started. Due to this foaming, the thickness and volume of each of the intermediate molten resin layers 32m and 37m increase and the front side molding surface 2
1 and the gaps S1 and S2 between the surfaces of the skin melt resin layers 33m and 38m decrease, and after 40 to 60 seconds, the surfaces of the skin melt resin layers 33m and 38m have the front side molding surface as shown in FIG. The molten resin 30m, 35m is filled between the upper and lower molds 10, 20 and molded. The heater may be an electrothermal type surface heater provided on each of the molding surfaces 11 and 21, or may be a molding surface 11 inside each of the dies 10 and 20.
The heating steam may be passed through a heat exchange tube provided near 21.

In the cooling step following the foaming step, the heaters are stopped to lower the temperature of the molding surfaces 11 and 21 by transferring heat to the insides of the dies 10 and 20, for example. In the case where a heat exchange tube is provided in each of the molds 10 and 20, the temperature of each of the molding surfaces 11 and 21 may be lowered by passing cooling water through the tube. Each molding surface 1
When the respective molten resins 30 m and 35 m are hardened by the temperature decrease of 1, 21, the upper mold 20 is raised and the door trim is taken out. As a result, one cycle of door trim molding is completed, and a door trim in which the base materials 31, 36, the intermediate foam layers 32, 37, and the skins 33, 38 of different colors are integrated is obtained. As a result, door trims having different surface colors with respect to the predetermined parting line C are manufactured by only one molding device.

In the above embodiment, the partition plate 22 is
Is provided, so that the skin molten resin layers 33m, 38m which are likely to move slightly when the molten resin 30m, 35m are filled.
Are separated by the partition plate 22, and the boundary of color or pattern is not disturbed, so that a synthetic resin product having a clear boundary can be obtained. However, depending on the shape or molding conditions of the synthetic resin product, the partition plate 22 is not always necessary.

In the above-described embodiment, the case where the surface colors are made different by making the colors of the molten resin materials used for the respective skin molten resin layers 33m and 38m different from each other has been described. The molten resin material used for the layers 33m and 38m may be mixed with a plurality of different colors so that the pattern appearing on the surface is different.

In the above embodiment, each molten resin 30
An example in which the die heads 34 and 39 extrude and supply a laminate of the base molten resin layers 31m and 36m, the intermediate molten resin layers 32m and 37m kneaded with a foaming agent, and the skin molten resin layers 33m and 38m as m and 35m will be described. ing. If the skin melt resin layers 33m and 38m are used, only the skin melt resin layers 33m and 38m need to be made different from each other in order to make the surface color or pattern different.
Since the base material molten resin layers 31m and 36m that are used in large amounts are common, it is easy to arrange the molten resin material. If an intermediate molten resin layer in which a foaming agent is kneaded is used, a soft feel can be given to the surface of the obtained product. However, the die heads 34 and 39 are provided with the base molten resin layers 31 m and 36.
The molten resin 30m, 35m in which the m and the skin molten resin layers 33m, 38m are laminated may be extruded and supplied, or the molten resin 30m, 35m composed of only the base resin molten resin layers 31m, 36m may be extruded and supplied. It may be a thing. In the latter case, the base material molten resin layer 31m,
What is necessary is just to make the color or pattern of each synthetic resin material used for 36m differ.

Further, in the above embodiment, the molten resin 30m, 35m is supplied onto each half 10a, 10b of the lower die 10 by the two die heads 34, 39. However, each die 10a, 35m is supplied by one die head. Molten resin 30 on 10b
m, 35 m can also be supplied. For this purpose, for example, the base material molten resin layers 31m, 3
A die head is used in which an extrusion port for extruding each of the intermediate molten resin layers 32m and 37m is arranged on both sides of a slit-shaped extrusion port for extruding 6m, and an extrusion port for extruding the skin molten resin layers 33m and 38m is further outside. I just need. This die head stops supplying the molten resin material that becomes the intermediate molten resin layer 37m and the skin molten resin layer 38m when the molten resin 30m is supplied onto the one half 10a, and the base molten resin layer 31m moves downward. When the die head is moved in such a direction as to be on the side, and when the molten resin 35m is supplied onto the other half 10b, the supply of the molten resin material to be the intermediate molten resin layer 32m and the skin molten resin layer 33m is stopped. Then, the respective molten resins may be supplied by moving the die head in such a direction that the base resin molten resin layer 36m is on the lower side (opposite to the above).

[0029]

As described above, according to the present invention, it is possible to manufacture a synthetic resin product having a different surface color or pattern with only one molding device at the parting line, and thus the surface is classified into a plurality of colors. Alternatively, it is possible to manufacture a laminated body having a good appearance in which patterns are separated at a low cost. In addition, the boundary between the two molten resins, which is the boundary for color or pattern separation, is slightly dented due to the viscosity of each molten resin to form a V-shaped groove in cross section. Can be

According to the apparatus provided with the thin partition plate protruding from the front side molding surface of the upper mold, the movement of those surface portions is blocked by the partition plate at the time of filling the molten resin. A sharp product is obtained.

In addition, according to the lower mold having the cutting projections provided along the lower edge of each opposing surface of each half, unnecessary portions of the front end portion of each molten resin before the joining portion are formed by the lower mold. Since the half portion is cut by moving to the closest position, the post-molding post-processing labor is reduced.

According to the structure in which each die head extrudes, as each molten resin, a laminate of a base material molten resin layer and a skin molten resin layer each having a predetermined thickness, the molten resin is melted in order to make the surface color or pattern different. It is only the skin melt resin layer that needs to be made of a different resin material, and the base material melt resin layer that uses a large amount is common, so that the arrangement of the melt resin material becomes easy.

Further, each die head is used as each molten resin,
According to the method of extruding the laminate of the intermediate molten resin layer and the skin molten resin layer obtained by kneading the base material molten resin layer and the foaming agent each having a predetermined thickness, in addition to the effects of the preceding paragraph, the surface of the obtained product Can be given a flexible feel.

[Brief description of the drawings]

FIG. 1 is a sectional view of a stamping molding apparatus according to an embodiment of the present invention in a molten resin supply step.

FIG. 2 is a cross-sectional view of the embodiment shown in FIG. 1 at the end of a coupling step and a suction / adhesion step.

FIG. 3 is a sectional view of the embodiment shown in FIG. 1 at the end of a mold clamping step.

FIG. 4 is a sectional view of the embodiment shown in FIG. 1 at the time of completion of a foaming step.

FIG. 5 is a cross-sectional view of an example of a synthetic resin product manufactured according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Lower mold, 10a, 10b ... Half part, 11 ... Back side molding surface, 12a, 12b ... Opposing surface, 13a, 13b ... Cutting projection, 17 ... Actuator, 20 ... Upper mold, 21 ... Front side molding surface,
22: partition plate, 30m, 35m: molten resin, 31m, 3
6m: base material molten resin layer, 32m, 37m: intermediate molten resin layer, 33m, 38m: skin molten resin layer, 34, 39: die head, C: parting line, P: separation surface.

Claims (5)

[Claims] 1. A lower mold having a rear molding surface formed on an upper side, and a front side provided at the lower mold so as to be able to approach and separate from above and having a predetermined gap between the lower molding surface at a closest position. In a stamping molding apparatus for producing a synthetic resin product having an upper mold having a molding surface formed on a lower surface and having a different surface color or pattern at a predetermined parting line, the lower mold has a vertical separation corresponding to the parting line. Two halves which are horizontally separable from each other in plane and each of which has a pair of opposing opposing surfaces which are located at the closest position along the separation surface and at a predetermined interval with the separation surface interposed therebetween. An actuator for forming a surface and reciprocating at least one of the halves in a horizontal direction so that the halves are moved toward and away from each other, and the predetermined device between the opposing surfaces of the halves at the closest position. of The thickness of the tip portion is larger than half of the interval and the sheet-like molten resin having a different surface color or pattern is extruded so that the surface of each molten resin faces upward and covers the upper surface of each of the half portions. A stamping molding device comprising a die head for supplying to a die. 2. The upper die has a shape corresponding to the separation surface.
The stamping forming apparatus according to claim 1, wherein a thin partition plate is integrally provided so as to protrude from the front side forming surface toward the lower mold. 3. A cutting projection is provided on each of the halves so as to approach each other along a lower edge of each of the opposing surfaces and a leading edge of each of the halves comes into contact with each other at the closest position of the halves. The stamping molding apparatus according to claim 1 or 2. 4. The method according to claim 1, wherein each of the die heads extrudes a laminate of a base material molten resin layer and a skin molten resin layer each having a predetermined thickness as the molten resin. 3. The stamping molding apparatus according to claim 1. 5. Each of the die heads extrudes, as each of the molten resins, a laminate of an intermediate molten resin layer and a skin molten resin layer obtained by kneading a base material molten resin layer having a predetermined thickness, a foaming agent, and the like. The stamping molding apparatus according to claim 1.