JP3476562B2 - Mold for laminated molded article and molding method of laminated molded article - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold for a laminated molded article for molding a laminated molded article having a surface coated with a surface material, and a method for molding the laminated molded article, such as an automobile such as a sun visor and a headrest. It can be used when manufacturing parts or furniture parts such as chair backs.

[0002]

2. Description of the Related Art Conventionally, as a vehicle interior product such as a sun visor and a headrest, a laminated molded product in which at least a part of its surface is covered with a flexible skin material has been used. According to such a laminated molded product, since the surface is covered with the flexible skin material, it is possible to give a good feel when touched by hand, and also to use a woven fabric or the like as the skin material. For example, decorativeness can be imparted. Also,
Since good cushioning properties can be obtained by increasing the thickness of the skin material, if a laminated molded product is used for the lid of the console box or the like, impact noise during opening and closing, vibration during running, etc. can be suppressed. Furthermore, the skin surface material having cushioning properties is
Since it becomes possible to seal the gap, it is possible to impart good sound insulation and sealing properties.

Such a laminated molded article can be manufactured by fixing a skin material to the molding surface of the mold and then filling the mold with a molten resin. The following molds can be used to manufacture the laminated molded product. I. A mold provided with a fixing frame for sandwiching the peripheral edge of the skin material outside the cavity filled with the molten resin (Japanese Patent Publication No.
63-24807 publication). B. A die that is provided outside the cavity with a pin that is inserted into the skin material and fixes the peripheral edge of the skin material with this pin (Japanese Patent Laid-Open No. 5-77264). C. A mold for forming a suction hole for sucking the skin material on the molding surface, and fixing the skin material with the suction hole (Japanese Patent Publication No. 60-38250). D. A mold in which a molding surface is formed of a porous member having air permeability, and a negative pressure is applied to the back surface side of the molding surface so that the skin surface material is sucked and fixed to the molding surface.

[0004]

The molds shown in the above items 1 to 2 have the following problems. [Problems of A and B molds] Since the skin surface material extends to the outside of the cavity, the skin surface material around the molded product becomes an excess portion. Since this surplus portion is unnecessary, post-processing such as trimming work for cutting off the surplus portion of the skin material after molding is required, and there is a problem that this post-processing impairs the manufacturing efficiency of the laminated molded product. Further, since it is difficult to fix the skin surface material to a part of the surface of the molding surface, there is a problem that it is not suitable for manufacturing a partially laminated molded product. [Problem of the die of C] There is a problem that the traces of the suction holes remain on the surface of the molded product, and the traces impair the appearance of the molded product. On the other hand, if the suction holes are made small so that the traces of the suction holes are not conspicuous, the suction force becomes insufficient, and it becomes difficult to fix the skin surface material. [Problem of Die Mold] Since the porous member is easily clogged, there is a problem in that, during continuous operation or the like, the suction force is reduced and the skin surface material cannot be securely fixed.

It is an object of the present invention to provide a die for a laminated molded article and a method for molding a laminated molded article, which can surely fix a skin surface material without deteriorating the appearance quality of the molded article.

[0006]

A first aspect of the present invention is a die for a laminated molded article for molding a molded article having a flexible skin material adhered to at least a part of the surface thereof. A fixing mechanism for fixing the skin surface material to the molding surface by a suction hole for sucking the skin surface material, and the fixing mechanism includes a valve for opening and closing the suction hole by projecting and retracting from the molding surface. A body is provided, and the valve body is shaped so as to close the suction hole when it is submerged in the molding surface and form the same surface as the molding surface. In the above, the fixing mechanism is provided with an urging means for urging the valve body in a direction projecting from the molding surface, and the urging means is stronger than the suction force of the suction hole and is internal. It is preferable to have an urging force that is weaker than the pressure applied to the molten resin filled in. Further, in order to prevent the displacement of the skin material, an auxiliary needle that is inserted into the skin material may be provided on the molding surface of the mold. The auxiliary needle does not need to completely fix the skin material. For this reason, as the auxiliary needle, an extremely fine needle in which traces formed on the molded product are not conspicuous or a short needle that can be pierced shallowly into the skin material can be used.
If the auxiliary needle is also used to fix the suction hole, the suction force of the suction hole can be set low.

A second aspect of the present invention is a suction hole for sucking the surface material in order to form a molded article in which a flexible surface material is attached to at least a part of the surface,
A mold provided with a fixing mechanism having a valve body that forms the same surface as the molding surface when the suction hole is opened and closed is used, and the skin material is fixed inside the mold by the fixing mechanism. After that, the mold is filled with molten resin, and the valve body of the fixing mechanism is closed. In the above, the fixing mechanism is provided with an urging means for urging the valve body in a direction projecting from the molding surface, and the urging force of the urging means is stronger than the suction force of the suction hole, In addition, the pressure applied to the molten resin filled inside is set to be weaker. Then, the valve body is pressed against the suction force of the suction hole to open the suction hole to fix the skin surface material, and then the molten resin is filled in the mold, and the pressure is applied to the molten resin. It is preferable that the urging means is bent to close the suction hole with the valve body, and the molten resin is molded with the suction hole closed.

In the present invention as described above, the following materials and molding methods can be adopted. (1) Material As the synthetic resin forming the molded article, polypropylene,
Thermoplastic resins such as polystyrene, polyethylene, ABS, polycarbonate, mixtures of these resins, and
Those obtained by adding a filler such as talc, mica or glass fiber to these thermoplastic resins can be adopted. Further, as the skin surface material, a thermoplastic resin surface material, a foam surface material (preferably having independent pores), and a single layer surface material such as a film on which a decorative pattern or the like is printed, and a thermoplastic elastomer (hereinafter, As a surface material such as TPO) or vinyl chloride resin, a multilayer surface material in which a lining material made of a thermoplastic resin, a foam of a thermoplastic resin, a non-woven fabric or the like is lined can be adopted.

(2) Molding method As the molding method, any method can be adopted as long as a predetermined pressure is applied to the molten resin filled in the mold. For example, a general injection molding method of filling a molten resin in a completely closed mold with an injection molding machine, after filling the molten resin with an injection molding machine in a closed mold leaving a compression allowance,
An injection compression molding method in which the mold is completely closed, and a press molding method in which the mold in an open state is filled with molten resin by a press molding machine and then the mold is closed can be adopted. this house,
The press molding method also includes a molding method such as flow stamping for molding a molten resin extruded from an extruder or sheet stamping using a heated resin sheet.

[0010]

In the present invention as described above, when the mold is filled with the molten resin and a predetermined pressure is applied to the molten resin, the skin surface material mounted in the mold is no longer attracted by the suction holes. If not, it is fixed in place in the mold. Therefore, after the molten resin is filled in the mold, the filled molten resin fixes the surface material, so that no problem occurs even if the suction holes are closed. Also, by closing the suction hole, the valve body that closed the suction hole forms the same surface as the molding surface of the mold, so there is no trace of the suction hole on the surface of the obtained molded product, and the appearance of the molded product Will be good. further,
Even if the size of the suction hole is set according to the desired suction force, it will not affect the appearance of the molded product at all, so setting the appropriate size will ensure that the skin material is inside the mold. It becomes fixable, which achieves the above-mentioned object.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a main part of an injection compression molding machine 1 of the present embodiment. This injection compression molding machine 1 is a general-purpose horizontal injection molding machine in which a compression molding mechanism is incorporated, and a molten resin 30 It has an injection device 10 for injecting and a molding die 20. The injection device 10 is provided with a screw 12 for kneading a molten synthetic resin 30 inside a cylindrical barrel 11. A nozzle 13 is provided at the tip of the barrel 11.
By connecting the nozzle 13 to the bush 21 of the mold 20 and injecting the molten resin 30, the inside of the mold 20 is filled with the molten resin 30.

The mold 20 includes a fixed mold part 20A on the right side of the drawing,
The movable mold part 20B on the left side and the cavity 22 formed between these mold parts 20A and 20B are provided. Of these, the fixed mold portion 20A is fixed to the injection compression molding machine 1 immovably. In addition to the bush 21 described above, the fixed mold portion 20A is provided with a direct gate 23 for supplying the molten resin 30 to the substantially central portion of the cavity 22. The parting shape of the die 20 is such that it forms a spigot structure. The movable mold part 20B is movably provided in the injection compression molding machine 1. A mold clamping device (not shown) is arranged on the left side of the movable mold part 20B in the figure. By pressing the movable mold part 20B toward the fixed mold part 20A with this mold clamping device, the mold 20 is closed.

These fixed mold section 20A and movable mold section
The skin surface material 2 is attached to each of the molding surfaces 24 and 25 of the 20B facing each other by the fixing mechanism 40. In addition, the skin surface material 2 attached to the fixed mold portion 20A side
At this position, a resin introduction hole 2A having a size slightly larger than that of the direct gate 23 is formed at a position corresponding to the direct gate 23. With this resin introduction hole 2A, the mold parts 20A, 20B
The molten resin 30 can be filled between the skin surface materials 2 attached to each of the. The fixing mechanism 40 is provided with a suction hole 41 that is opened on the surface of each molding surface 24, 25 and is connected to a vacuum suction device (not shown), and a valve portion 42 that opens and closes the suction hole 41. is there. Valve part 42 of fixing mechanism 40
As shown in FIG. 2, has a valve body 43 that opens and closes the suction hole 41 by projecting and retracting from the molding surfaces 24 and 25, respectively.
The valve body 43 is a rotating body having a substantially T-shaped side surface, and has a suction hole.
It is movably provided along the extension direction of 41 (left-right direction in the figure). The valve body 43 has a mortar-shaped plug portion 44 corresponding to the opening 26 of the suction hole 41 formed on the molding surfaces 24 and 25, and is integrally molded with the plug portion 44 and faces the inside of the suction hole 41. And a rod-shaped valve stem 45 extending in a vertical direction.

When the plug portion 44 is submerged in the opening 26 formed in the molding surfaces 24 and 25, the mortar-shaped bottom surface 44A of the plug portion 44 forms the molding surface.
It is designed to be flush with 24 and 25. The valve stem 45 has a collar portion 46 at its intermediate portion.
The collar portion 46 is provided with a ventilation hole 47,
A coil spring 48 as an urging means for urging the valve body 43 in a direction projecting from the molding surfaces 24, 25 is in contact therewith. The flange portion 46, which is urged by the coil spring 48 and advanced, is locked to the stepped portion 49A provided on the inner surface of the suction hole 41. The plug portion 44 can be projected from the molding surfaces 24 and 25 by the predetermined dimension A by the engagement between the collar portion 46 and the stepped portion 49A. The end portion of the coil spring 48 on the left side in the drawing has a stepped portion 49 facing the stepped portion 49A in the suction hole 41.
Abuts B. The biasing force of the coil spring 48 is stronger than the suction force with which the negative pressure suction hole 41 sucks the valve body 43, and when the molten resin 30 is filled in the mold 20, the molten resin 30 It is set to be weaker than the pressure applied to.

In this embodiment, injection compression molding is performed by the following procedure. First, the vacuum suction device is activated, and when the fixing mechanism 40 can fix the skin surface material 2, the mold 20 is opened, and as shown in FIG. 3 (A), the fixed mold part 20A and the movable mold part 20A. The skin surface material 2 is attached to the molding surfaces 24 and 25 of the mold portion 20B, respectively. After mounting the skin surface material 2, the mold clamping device is driven to advance the movable mold part 20B toward the fixed mold part 20A, and the movable mold part 20B is located at a position before the completely closed position of the mold 20. To stop. As a result, the closed state of the mold 20 is changed to an incomplete closed state in which the compression margin remains. Next, the injection device 10 is driven to start the filling process, and the molten resin 30 is filled in the cavity 22 of the mold 20. Immediately before or immediately after the completion of this filling process, the compression device is driven to start the compression process, and the movable mold part 20B is advanced.
As shown in FIG. 3B, pressure is applied to the molten resin 30 in the cavity 22 so that the molten resin 30 is spread and filled in the entire cavity 22.

At this time, the pressure applied to the molten resin 30 causes the molten resin 30 to push the valve body 43 against the molding surfaces 24 and 25 against the biasing force of the coil spring 48, and the plug portion of the valve body 43.
44 goes into the openings 26 of the molding surfaces 24 and 25,
44A is flush with molding surfaces 24 and 25. After the molten resin 30 has spread over the entire cavity 22, a pressure holding step of holding the pressure applied to the molten resin 30 is performed. During this pressure holding step, the molten resin 30 is cooled and solidified. Even in this pressure-holding step, the pressure applied to the molten resin 30 is maintained, so that the bottom surface 44A of the plug portion 44 and the molding surfaces 24, 25 remain the same surface. When the molten resin 30 is sufficiently cooled and solidified, the pressure holding step is completed, the mold 20 is opened, and the molded product is taken out. When the injection is completed, the plasticizing step of plasticizing the molten resin 30 for the next injection molding is started.

According to this embodiment as described above, there are the following effects. That is, after the mold 20 is filled with the molten resin 30 and a predetermined pressure is applied to the molten resin 30 so that the suction force of the suction hole 41 becomes unnecessary, the suction hole 41 is closed and the valve body 43
Since the plug portion 44 of the same forms the same surface as the molding surfaces 24, 25 of the mold 20, no trace of the suction hole 41 remains on the surface of the obtained laminated molded article, and the appearance of the laminated molded article Can be good.

Further, even if the dimensions such as the diameter are changed, the suction hole 41 does not have any influence on the appearance of the laminated molded product. Therefore, by setting the diameter of the suction hole 41 to an appropriate dimension, the die The skin surface material 2 can be securely fixed within 20.

Further, since the fixing mechanism 40 is composed of the valve body 43 having a substantially T-shaped side surface, the coil spring 48, etc.,
The fixing mechanism 40 has a simple structure, can be easily applied to the mold 20, and the existing mold 20 can be easily modified.

Further, the pressure applied to the molten resin 30 causes the plug portion 44 of the valve body 43 to be automatically submerged in the openings 26 of the molding surfaces 24 and 25. Therefore, the injection compression molding machine 1 side It is not necessary to modify the control circuit, etc., and the implementation can be facilitated.

Next, the effects of the present invention will be described based on concrete experimental examples. [Experimental Example 1] The experimental example 1 is an experiment for molding a laminated molded article based on the present invention. In Experimental Example 1, a disc-shaped laminated molded product having a decorative film attached to both surfaces is formed by a mold having suction holes provided with the valve portion 42 shown in the above-described embodiment. [Comparative Example 1] In order to confirm the effect of the present invention, Comparative Example 1 is an experiment in which the same molded product as that of Experimental Example 1 is obtained by an injection molding method of a conventional technique. In Comparative Example 1, a conventional vacuum suction type fixing mechanism, that is, a mold in which only a suction hole is provided and the valve portion 42 is omitted, is used to mold the same disk-shaped laminated molded product as in Experimental Example 1. To do.

[Common Injection Conditions] Experimental Example 1 and Comparative Example 1
Then, molding is performed using the following materials, devices, molding conditions, and the like. (1) Material As a synthetic resin constituting a molded article, polypropylene (made by Idemitsu Petrochemical Co., Ltd., trade name: Idemitsu Polypro J-505
0, MI 55g / 10 minutes (230 ° C, 2.16kgf)) is used. Also,
As the surface material, a decorative pattern is printed with a thickness of 0.1 mm
Of polypropylene film is used. (2) Molding device As the molding device, a general-purpose horizontal injection molding machine (maximum clamping force: 200 ton, manufactured by Toshiba Machine Co., Ltd.) with an injection compression molding mechanism is used. (3) Mold As the mold, the mold having the structure shown in the above embodiment is adopted. Specifically, a disk-shaped cavity 22 with a diameter of 250 mm
The mold 20 is provided with a direct gate 23 for supplying molten resin to the center of the cavity 22, and a suction hole 41 for fixing the skin surface material. Of these, the suction hole 41 is
Four fixed mold parts 20A and four movable mold parts 20B are provided, and the fixed mold parts 20A and the movable mold parts 20B are arranged at equal intervals on a circumference that is concentric with the outer peripheral edge of the cavity 22. As described above, the mold 20 used in Experimental Example 1 is provided with the valve portion 42 at the outlet portion of the suction hole 41, while the comparative example 1 has a valve portion 42 at the outlet portion of the suction hole 41. The valve section 42 is not provided. In the above, regarding the mold 20 of Experimental Example 1, the diameter of the plug portion 44 of the valve portion 42 was set to 5 mm, and the plug portion 44
The predetermined dimension A protruding from the molding surfaces 24, 25 is 1 mm. On the other hand, in Comparative Example 1, the diameter of the outlet portion of the suction hole 41 is 1.0 mm.

(4) Molding conditions The following values are adopted as molding conditions. Molding temperature 200 ℃ Mold temperature 40 ℃ Resin injection time 1.4 seconds Resin injection pressure 90 kg / cm ² (gauge pressure) Resin cooling time 40 seconds Mold compression amount 10 mm Mold clamping start timing From injection start 1 Compressing speed after 0 seconds 10 mm / second Compressive force during mold clamping 50 t [Experimental result] In Experimental Example 1, displacement of the skin material 2 and wrinkles did not occur, and traces of the suction holes 41 also occurred. Without doing so, a good laminated molded product having an excellent appearance was obtained. On the other hand, in Comparative Example 1, since traces of the suction holes 41 remain on the surface of the laminated molded product, the resulting laminated molded product has a poor appearance.

[Experimental Example 2] This Experimental Example 2 is the same as Experimental Example 1 described above.
It is an experiment in which a laminated molded article in which a foamed polyurethane sheet is attached instead of the decorative film of 1 is molded according to the present invention. The molded product 50 molded in this Experimental Example 2 is as shown in FIG.
As shown in (B), a soft portion 52 made of a foam surface material is attached to a part of one surface of a rectangular hard portion 51. In this molded product 50, the vertical dimension S1, the horizontal dimension L1, and the thickness dimension T1 of the hard portion 51 are 100 mm and 30 mm, respectively.
It is 0 mm and 1.5 mm, and the longitudinal dimension S2, lateral dimension L2, and thickness dimension T2 of the soft part 52 are 60 mm and 200, respectively.
mm and 5.0 mm.

[Common Injection Conditions] In Experimental Example 2, the following materials, devices, molding conditions and the like are adopted. (1) Polypropylene (made by Idemitsu Petrochemical Co., Ltd., trade name: Idemitsu Polypro J-5050, MI
55g / 10 minutes (230 ° C, 2.16kgf)) is used. Also, the soft part
A foamed polyurethane sheet is used as the skin material to be 52. (2) Molding Device As the molding device, as in the first embodiment, a general-purpose horizontal injection molding machine with an injection compression molding mechanism incorporated therein is used. (3) Mold As the mold, as shown in FIG. 5A, a mold 60 having the same structure as the mold 20 of the above-mentioned embodiment is used. This mold 60
The skin surface material 2 is attached only to the movable mold part 60B.
Therefore, the fixing mechanism 40 is provided only in the movable mold part 60B. The movable mold part 60B is provided with a recess 61 depending on the size of the skin material 2, and the suction hole 41 of the fixing mechanism 40 is opened in the recess 61. In the vicinity of the suction hole 41, an auxiliary needle 62 that is inserted into the surface skin material 2 is projected. The auxiliary needle 62 and the recess 61 prevent the skin surface material 2 attached to the movable mold portion 60B from being displaced. The length dimension of the auxiliary needle 62 is adjusted so that the tip of the auxiliary needle 62 does not penetrate through the surface material 2 and protrude toward the molten resin 30 when the surface material 2 is compressed by clamping the mold 60. Is set to be smaller than the thickness dimension B of the skin material 2 at the time of compression, as shown in FIG. 5 (B).

(4) Molding conditions As the molding conditions, the following values are adopted. Molding temperature 200 ℃ Mold temperature 40 ℃ Resin injection time 1.0 seconds Resin injection pressure 80 kg / cm ² (gauge pressure) Resin cooling time 30 seconds Mold compression amount 20 mm Mold clamping start timing From injection start 0 Compression rate after 8 seconds 10 mm / sec Compression force during mold clamping 40 t [Experimental result] The molded article obtained in Experimental Example 2 has no displacement of the skin surface material 2 and no entrainment of resin at the edge portions. Moreover, there is no trace of the suction hole 41, and the appearance is good.

Although the present invention has been described with reference to the preferred examples and experimental examples, the present invention is not limited to these examples and experimental examples, and various modifications are possible within the scope of the present invention. Can be improved and the design can be changed. For example, the synthetic resin forming the molded article is not limited to polypropylene, but polystyrene, polyethylene, A
Thermoplastic resins such as BS and polycarbonate, mixtures of these resins, and talc for these thermoplastic resins,
It is also possible to add a filler such as mica or glass fiber. Further, the skin surface material is not limited to a film or a foam surface material on which a decorative pattern or the like is printed, but a single layer surface material such as a normal thermoplastic resin surface material, and a surface material such as TPO or vinyl chloride resin, It may be a multilayer surface material lined with a lining material made of a thermoplastic resin, a thermoplastic resin foam, or a non-woven fabric.
Further, the mold is not limited to one having only one cavity, and may be a mold having a plurality of cavities such as a family mold type mold.

Further, the fixing mechanism is not limited to a passive type in which the valve body pressed by the pressure applied to the molten resin closes the suction hole, but an active type in which the driving mechanism such as a hydraulic cylinder device opens and closes. However, if the passive type is adopted as in the above-mentioned embodiment, the valve body is automatically closed by the filling of the molten resin, so that the control circuit of the injection compression molding machine side need not be modified. The effect that it can be easily implemented is obtained.

Further, the fixing mechanism is not limited to the one provided with a round hole-shaped suction hole and a valve body composed of a rotating body having a substantially T-shaped side surface, and a suction hole elongated in a slit shape and the suction hole. It may be an elongated valve body formed corresponding to the suction hole, and the specific structure of the fixing mechanism may be set appropriately in practice.

Further, the biasing means is not limited to the coil spring but may be another type of spring such as a leaf spring. In short, the valve body is biased against the suction force of the suction hole so that the suction hole is opened. Anything that can be opened will do.

The present invention is not limited to the injection compression molding method, but a general injection molding method in which a molten resin is filled in a completely closed mold by an injection device, and a press molding method in an open mold. It can also be applied to a press molding method in which the mold is closed after filling the molten resin with a machine. Among them, the press molding method includes a molding method such as flow stamping for molding the molten resin extruded from the extruder or sheet stamping using a heated resin sheet.

[0032]

As described above, according to the present invention, the skin surface material can be reliably fixed without impairing the appearance quality of the molded product.

[Brief description of drawings]

FIG. 1 is a sectional view showing a main part of an injection compression molding machine according to a first embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view showing a fixing mechanism in the embodiment.

FIG. 3 is a view for explaining a molding procedure of the above embodiment.

FIG. 4 is a two-sided view showing a molded product molded in Experimental Example 2 according to the present invention.

FIG. 5 is a diagram for explaining a mold used in Experimental Example 2 according to the present invention.

[Explanation of symbols]

2 Skin material 20, 60 mold 24, 25 molding surface 30 Molten resin 40 fixing mechanism 41 Suction hole 43 Disc 48 Coil spring as biasing means

Continuation of front page (51) Int.Cl. ⁷ Identification code FI B29C 45/26 B29C 45/26 // B29L 9:00 B29L 9:00 31:58 31:58 (56) Reference JP-A-5-200780 (JP, A) JP-A-5-212754 (JP, A) JP-A-7-276425 (JP, A) Actually developed 55-154111 (JP, U) (58) Fields investigated (Int. Cl. ⁷⁾ , DB name) B29C 33/18 B29C 43/18 B29C 43/34 B29C 43/36 B29C 45/14 B29C 45/26

Claims (4)

(57) [Claims] 1. A mold for a laminated molded article for molding a molded article in which a flexible skin material is attached to at least a part of the surface, the suction hole sucking the skin material. It has a fixing mechanism that fixes the skin surface material to its molding surface.
A valve body is provided that opens and closes the suction hole by protruding and retracting from the molding surface, and the valve body closes the suction hole when it sinks into the molding surface and forms the same surface as the molding surface. Molds for laminated molded products characterized by 2. The mold for a laminated molded article according to claim 1, wherein the fixing mechanism is provided with a biasing means for biasing the valve body in a direction projecting from the molding surface. The means has a biasing force that is stronger than the suction force of the suction holes and weaker than the pressure applied to the molten resin filled inside, and the molding die for a laminated molded article. 3. A suction hole for sucking the skin material and a suction hole for sucking the skin material to form a molded article in which a flexible skin material is attached to at least a part of the surface, and when the suction hole is opened and closed. Using a mold provided with a fixing mechanism having a valve body forming the same surface as the molding surface, after fixing the skin surface material to the inside of the mold by the fixing mechanism,
A method for molding a laminated molded article, which comprises filling the mold with a molten resin and closing the valve body of the fixing mechanism. 4. The method for molding a laminated molded article according to claim 3, wherein the fixing mechanism is provided with a biasing means for biasing the valve body in a direction projecting from the molding surface. The biasing force of the means is set to be stronger than the suction force of the suction hole and weaker than the pressure applied to the molten resin filled inside, and the valve body is pushed against the suction force of the suction hole. After fixing the skin surface material with the suction hole open, the molten resin is filled in the mold, and the biasing means is bent down by the pressure applied to the molten resin to cause the valve body to suck the suction hole. Is closed, and the molten resin is molded with the suction hole closed.