JPH03159714A - Molding method of synthetic resin product covered with decorative sheet and its device - Google Patents

Abstract

PURPOSE:To prevent a sheet member from being projected from a molded object like a burr by a method in which the sheet member is fixed to one mold, and is heated and then it is molded with said mold, and when said mold is clamped, the sheet member is punched and simultaneously fixed, and then the resin is molded by filling the cavity with the resin. CONSTITUTION:The cavity 11 in which the core 12 for sucking air is provided on its bottom surface, is formed in a first mold 10, and the air in the cavity 11 is discharged through a vent 12a. A fixed guide core 30 is inserted into the outer periphery of said molds movably in the axial direction, and fixes a decorative sheet A, and then guides a second mold 20. The core 22 in which the step part 22a to be fitted into the cavity 11 is formed on a base is provided in the second mold 20, and edge pants 11a, 22a1 are formed on the outer edge of the cavity 11 and the step part 22a. The sheet member A is positioned on the cavity 11 and is fixed by the guide core 30, and then it is heated with a heater 42. The air is discharged from a vent 12a, whereby the sheet member A is brought in close contact with the inner surface of the cavity. Next, mold clamping is carried out with the second mold 20. Then the sheet member A is punched with the edge parts 22a1 and 11a, and the edge surface 22a2 of the step part 22a pushes the end surface to be cut.

Description

[Detailed Description of the Invention] Industrial Application Fields> The present invention is directed to the use of a resin product coated with a decorative sheet that improves decorativeness by covering the surface of the molded product with a sheet material at the same time as giving it an attractive appearance. This invention relates to a molding method and apparatus.

Prior Art> As a molding method in which a resin molded product is injection molded and the surface is covered with a sheet material at the same time, for example,
The one disclosed in Publication No. 972 is known. In this method, a preheated sheet material is punched out using a first mold piece and a second mold piece to cover only the area that can be used to produce crystals. The punched part is vacuum-formed according to the shape of the cavity of the first mold part, and then the first mold part is fixed with the mold part.
After the mold pieces and the second mold piece are clamped together with the third mold piece, molten resin is injected to produce a synthetic resin molded product whose surface is covered with a sheet material.

Further, as another molding method, for example, Japanese Patent Application Laid-open No. 6342891
A method disclosed in Publication No. 7 is known.

In this method, after positioning the patterned sheet material at a position covering the cavity of the female mold, the heating plate is moved to a position facing the female mold, and then the heating plate is pressed against the female mold to create the pattern. The patterned sheet material is supported and fixed between a heating plate and a female mold, and then the patterned sheet material is heated and softened by the heating plate, and compressed air is supplied from the heating plate to mold the patterned sheet material into the inner surface of the cavity of the female mold. The heating plate is then retracted to the standby position, the female mold is combined with the male mold and molten resin is injected, and then the pattern is formed using the blade provided on the male or female mold. Punch out the part that is integrated with the Gakai resin molded product from the attached sheet material.

Problems to be Solved by the Invention> However, in the former molding method (Japanese Patent Publication No. 55-25972), the second mold piece is moved to one side of the first mold part to reduce only the area that can be used to produce the molded product. The sheet material is punched out, and in this punching, a concave groove provided outside the periphery of the cavity of the first mold piece and a protrusion provided in the second mold piece are used. The periphery of the punched sheet material is located outside the cavity of the first mold piece. Therefore, after punching, the peripheral edge of the sheet material is supported and fixed by the first mold piece and the second mold piece to prevent positional deviation during vacuum forming, but after injection molding, the peripheral edge They protrude from the synthetic resin molded product like Paris, which not only has an inferior appearance but also requires work such as scraping after molding. In addition, since the sheet material is preheated before being positioned on the first mold piece, it is difficult to improve the positioning accuracy of the sheet material. It was difficult to accurately provide patterns and the like, and there was a risk of misalignment.

On the other hand, in the latter method (Japanese Unexamined Patent Publication No. 63-128917), the sheet material is positioned with respect to the female mold and then heated with a heating plate, so there is no problem like the former method, but the sheet material There was a drawback that it took time to move the heating plate from the waiting position to the position facing the tuna mold during heating.

In addition, after injection molding, the blade part provided in the male or tuna shape can be used to make citrus from the patterned sheet material! Since the sheet material integrated with the A molded product is punched out, there is a risk that a part of the sheet material will protrude from the synthetic resin molded product like a hole, and as in the case of the former case, the appearance will be inferior, as well. There were drawbacks such as the need for operations such as scraping after molding.

The present invention has been made in order to solve the above-mentioned problems of the prior art, and its purpose is to eliminate the risk of the sheet material protruding from the molded product, and to improve the efficiency of the molding work. An object of the present invention is to provide a method and apparatus for molding a synthetic resin product covered with a decorative sheet.

Means for Solving the Problems> In order to achieve the above object, the method for molding a synthetic resin product coated with a decorative sheet of the present invention includes one mold member having a cavity and a mold member inserted into the cavity. a sheet material fixing step of opening the other mold member having a core and fixing the sheet material to one of the mold members; a heating step of heating the sheet material fixed in the sheet material fixing step; A sheet material forming step in which the sheet material heated in the heating step is molded by one mold member, and when inserting the core of the other mold member into the cavity of the one mold member, the opening of the cavity The method includes a punching step of punching out the sheet material using the edge and the core and fixing the punched sheet material in a gap formed by the cavity and the core, and a molding step of molding a synthetic resin in the gap. It is characterized by the fact that

Further, the heating step is performed at the same time as the taking-out step of taking out the molded product from the mold.In addition, in the molding apparatus for synthetic resin products coated with a decorative sheet of the present invention, the sheet material is molded; a mold comprising one mold member provided with a means and the other mold member having a core to be inserted into the cavity; a fixing means for fixing a sheet material to the one mold member; heating means for heating the sheet material fixed by the fixing means, and punching the sheet material to the opening edge of the cavity of the one mold member and the core of the other mold member to be inserted into the cavity. A blade part is provided, and when the core is inserted into the cavity, the blade part punches out the sheet material and the punched sheet material is fixed in the gap formed by the cavity and the core. It is characterized by

Further, the heating means is provided in a take-out means for taking out the molded product from the mold.

<Operation> According to the above means, since the sheet material is heated while being set in one of the mold members, the positioning of the sheet material can be performed with high accuracy, and even when a pattern, etc. is attached to the sheet material, the positioning accuracy of the pattern, etc. can be maintained. is good.

Furthermore, when inserting the core of the other mold member into the cavity of one mold member, the sheet material is punched out using the opening edge of the cavity and the core, so the sheet material after punching is Its peripheral edge does not protrude outside from the opening edge of the cavity as in the conventional case, and is fixed in the gap between the core and the cavity. For this reason, the sheet material is accurately coated at a predetermined position on the surface of the molded product, and the sheet material does not protrude from the molded product like a lump.

Furthermore, when the molded product is taken out of the mold, the sheet material to be molded next is heated, so the molding work can be carried out efficiently.

Embodiment> A preferred embodiment of the present invention will be described below with reference to the drawings. [First Embodiment] FIGS. 1 to 8 show a first embodiment of the present invention. First, an embodiment of the molding apparatus of the present invention will be described. No.l
Reference numeral 10 in the figures to FIG. 8 indicates the first mold member on the movable side;
is the second mold member on the fixed side, 30 is the fixed guide core, 40
is a product retrieval robot.

The first mold member IO is fixed to a movable platen (not shown) and can be moved to the second mold member 20 side. The first mold member 10 is formed with a cavity l1 which is tapered so that the inner diameter on the bottom side becomes smaller, and an air suction lever l2 is provided on the bottom of the cavity l1. .

The air suction mantle 12 communicates with an air suction port 13 provided in the first mold member 1o, and the air suction port l3 is connected to an exhaust pump (not shown). While evacuating the air in the cavity II, a decorative sheet material A made of a thermoplastic resin such as polyvinyl chloride can be sucked and molded along the inner surface of the cavity 11.

Here, the decorative sheet material A is not limited to one with a pattern etc., but may be a plain one, or a plain one or one with a three-dimensional pattern formed by embossing or the like. That is, the decorative sheet material A may be any material that decorates the surface of the synthetic resin product.

Further, a fixed guide core 30 is provided on the outer circumference of the first mold member 10.
is inserted so that it can move in the axial direction. This fixed guide core 30 acts as a sheet material fixing means for fixing the decorative sheet material A to the first mold member lO, and also acts as a guide means for guiding the second mold member 20. A fixing surface 31 that fixes the sheet material A to the peripheral part 14 of the opening surface of the cavity 11 of the first mold member IO and the second mold member 2
A guide hole 32 for guiding 0 is provided.

A protruding bottle 33 is erected on the end face of one end of the fixed guide member 30, and the protruding bottle 33 passes through a hole 15a provided at one end of the flange 15 of the first mold member 10. There is. Further, a stop pin 16 is erected at the other end of the flange l5 of the l-th mold member 10, and the stop pin l6
is inserted into a recess 34 provided at the other end of the guide member 30.

Here, the tip of the stop pin l6 has a stopper number 1.1.
A spring 18 is interposed between the locking nut [7 and the bottom surface of the recess 34, and the elastic force of the spring 18 causes the fixed guide member 30 to move toward the first mold member 10. It is energizing. Further, the protruding pin 33 separates the fixed guide member 30 from the first mold member 10 against the elastic force of the spring 18, and separates the fixed guide member 30 from the first mold member 10.
A gap B is provided between the mold members 30.

Further, the second mold member 20 is provided with a core 22 having a smaller diameter than the inner diameter of the cavity 11 on its base plate 2l, and when the core 22 is inserted into the cavity 1 (the first mold member When the member 10 and the second mold member 20 are clamped), a molded product-shaped gap C (see FIG. 4) is formed between the cavity 1l and the core 22.

Further, a subroutine 23 for injecting molten synthetic resin from the substrate portion 21 to the core 22 is provided, and a gate 24 communicating with the subroutine 23 is provided on the end face of the core 22.

Here, the core 22 is formed into a tapered shape to match the cavity l1. A stepped portion 22a that fits into the cavity 11 is formed at the base of the core 22. As shown in FIG. 8, a blade portion 11a is formed on the opening edge of the cavity 11, and a blade portion 22a1 is also formed on the outer edge (corner portion) of the stepped portion 22a.
The decorative sheet material AA is punched out in cooperation with the members a and 22a1.

Further, the end surface 22at of the stepped portion 22a is adapted to press against the cut end surface of the punched decorative sheet material A. The depth D (see FIG. 8) at which the end surface 22a2 of the stepped portion 22a enters into the opening of the cavity 1l varies depending on the material, thickness, etc. of the decorative sheet material 6 to be punched, but in this embodiment, 0.1 maxi. It is set to about 0.0 m, preferably 0.3 vm to 0.8 fin. This is because if the depth D is shallower than 0.1 m, it will be difficult to punch out the decorative sheet material A, and if it is deeper than 1.0 m, wrinkles will occur in the decorative sheet material A, especially if the depth D is 0.3 wg to 0. .8
Within the range of a, the decorative sheet material A can be punched out well without wrinkles.

Further, the side surface 22a of the stepped portion 22a is guided to the inner surface 32a of the guide hole 32 of the fixed guide member 30, which is formed with the same taper as the cavity 11, as shown in FIG. The blade portion 22a1 of the portion 22a is prevented from colliding with the blade portion 11a at the opening edge of the cavity 1l and being damaged.

When the first mold member 10 is separated from the second mold member 20 and opened after completing one cycle of molding, the product take-out robot 40 removes the first mold member from the feeding side of the decorative sheet material A. It moves to a position closer to the IO. A suction cup 4l as a product retrieving means is provided on the side of the surface of the product takeout robot 40 facing the second mold member 20, and a suction cup 4l as a means for taking out the product is provided on the side of the side facing the decorative sheet material A fixed by the fixed guide core 30. A heater 42 is provided as a heating means, and is designed to heat and soften the decorative sheet material A to a moldable state in the process of taking out a synthetic resin molded product. That is, the product take-out robot l-40 takes out the molded product from the second mold member 20 side, returns to the first mold member 10 side, heats the decorative sheet material A with the heater 42, and then removes the decorative sheet material. It is designed to retreat to the sending side of 8.

Next, an example of the molding method of the present invention will be described.

First, as shown in FIG. 1, in a state where the first mold member 10 is separated from the second mold member 20 and opened,
3, the fixed surface 31 of the fixed guide core 30 is separated from the opening surface periphery l4 of the cavity 1l of the first mold member 10 to create a gap B, and this gap B is decorated with a known sheet material feeding device (not shown). The sheet material A is sent and the decorative sheet material A is positioned on the opening surface of the cavity 11. Next, when the protruding pin 33 is lowered (moved to the right side in the figure) as shown in FIG. 2, the fixed guide core 30 is urged toward the first mold member 10 by the elastic force of the spring 18. , the decorative sheet material A is clamped and fixed between the fixing surface 3l and the opening surface periphery l4 of the cavity ll. Then, the product take-out robot 40 moves from the feeding side of the decorative sheet material A and heats the decorative sheet material 8 with the heater 42 to soften it.

Since this heating step is performed after positioning and fixing the decorative sheet material A, there is no possibility that positioning of the pattern becomes difficult as in the case of preheating outside the mold.

Note that since there is no molded product to be taken out here, only the heating of the decorative sheet material A is performed.

Next, as shown in FIG. 3, the inside of the cavity 11 is evacuated from the air suction port 13 through the vent hole 12a of the air suction mandrel 12, and the decorative sheet material A is molded so as to fit closely along the inner surface of the cavity 1l. . At this time, cavity 11
If an uneven pattern is provided on the inner surface of the decorative sheet material A, the uneven pattern can be formed on the outer surface of the decorative sheet material A.

Next, as shown in FIG. 4, the first mold member 10 and the fixed guide core 30 are moved to the second mold member with the decorative sheet material A in close contact with each other under suction.
Move it to the mold member 20 side and clamp the mold. During this mold clamping, when the core 22 enters the cavity 11 of the first mold member 10, the stepped portion 22 as shown in FIG.
a blade portion 22a I is the blade portion 1 at the opening edge of the cavity 11
1a, the decorative sheet material A is punched out, and the cut end surface of the decorative sheet material A is 0.1 am-1, O rta from the opening surface of the cavity l1.
Push it in firmly to secure it. Here, in the punching process, the end face 22a2 is formed into the cavity l.
Since it penetrates about 0.1 am-1.0 III1 from the opening surface of No. 1, punching is performed well, and
Wrinkles do not occur in the punched decorative sheet material A.

Furthermore, since the side surface 22a of the stepped portion 22 is guided by the guide surface 32a of the guide hole 32 of the fixed guide core 30, there is no fear that the blade portion 22a will collide with the opening edge of the cavity 11 and be damaged.

Furthermore, the decorative sheet material A includes the fixed surface 3l and the opening surface peripheral portion 14.
Since it is fixed in place, there are no problems such as poor punching due to misalignment of the decorative sheet material A or misalignment of the pattern during punching. When punching and mold clamping are completed, a gap C in the shape of a molded product is created between the core 22 and the cavity l1.

Next, as shown in FIG. 5, the molten synthetic resin P is injected and filled into the gap C from the sublue 23 through the gate 24. As a result, the adhesive previously applied to the back surface of the decorative sheet material A and the molten synthetic resin become welded together, and the decorative sheet material A is integrated with the preparatory resin P.

If the decorative sheet material A and the synthetic resin P are made of the same material, no adhesive is required. When the injected resin P is cooled and solidified, the first mold member IO and fixed guide core 30 are returned to the positions shown in FIG. 1, as shown in FIG. Then, a gap B is created between the first mold member IO and the fixed guide core 30 by the protruding pin 33, and the remaining punched decorative sheet material A is transferred from the gap B by a sheet material feeding device (not shown) into the first mold member IO. While being fed out from the mold member 1O, a new decorative sheet material A is fed and positioned onto the opening surface of the cavity 1l.

Then, the product take-out robot 40 moves the heater 42 toward the decorative sheet material A side to a position closer to the first mold member. Next, as shown in FIG.
The synthetic resin molded product P' is adsorbed from 22 and released from the mold. At this time, the protruding bottle 33 is lowered (moved to the right side in the figure),
The fixed guide core 30 is biased toward the first mold member 10 side by the elastic force of the spring l8, and the fixed guide core 30 is pressed against the fixed surface 3l and the cavity l.
The decorative sheet material A is supported and fixed by the opening surface peripheral portion l4 of No. 1.

The decorative sheet material A is then heated and softened by the heater 42 of the moving product take-out robot 40.

Since this heating step is performed at the same time as the product removal step, the efficiency of the molding operation can be improved compared to the conventional case where only the heating step is performed alone.

Thereafter, the decorative sheet material A is formed into a shape that follows the inner surface of the cavity 1l as shown in FIG. 3, and then the decorative sheet material A is punched out as shown in FIG. As shown, molten synthetic resin is injected and the same operation is repeated. [Second Embodiment] FIGS. 9 to 13 show a second embodiment of the present invention. This second embodiment shows a case in which a hole Pa is provided in a part of a synthetic resin molded product P', and the inner peripheral surface of the hole Pa is also covered with the decorative sheet material A.

Note that the same parts as those shown in FIGS. L to 8 are designated by the same reference numerals, and their explanations will be omitted.

The air suction member 12 of the first mold member 10 is located at the hole-opening portion P of the synthetic resin molded product P' at the bottom of the cavity 1l.
The core 22 is disposed at a position corresponding to the position shown in FIG. It is being The depth of these four portions 22b is such that even if the convex portion 12a is inserted into the concave portion 22b, the convex portion 12a
The convex portion 1 is arranged so that the tip surface of the convex portion 1 does not come into contact with the bottom surface of the concave portion 22b.
It is formed slightly larger than the height of 2a.

FIG. 9 corresponds to the state shown in FIG. 2 of the first embodiment, in which the decorative sheet material A is attached to the fixed surface 3 of the fixed guide core 30.
1 and the peripheral portion 14 of the opening surface of the cavity 11 of the first mold member 10.

From the state shown in FIG. 9, the product take-out robot 4
After heating and softening the decorative sheet material A with the heater 42 of 0,
When exhausting air from the ventilation hole 12a of the air suction cylinder 12,
As shown in FIG.
It is shaped according to the inner surface shape of.

Next, the mold is clamped as shown in Figure 11. At this time, the decorative sheet material A is punched out by the cooperative action of the blade part 22a provided on the stepped part 22a and the blade part 11a provided on the opening edge of the cavity 11, and as shown in FIG. The convex portion 12a of the child 12 is fitted into the concave portion 22b on the end face of the core 22, and the decorative sheet material A is punched out by the blade portion 22bl at the opening edge of the cough concave portion 22b. Here, the insertion ID' of the convex portion 12a is set to, for example, 0.1 wa-1.0 cm. Thereafter, when the molten synthetic resin is injected and filled into the gap C, a synthetic resin molded article P' as shown in FIG. 13 is formed. The decorative sheet material A is also applied to the inner circumferential surface of the perforated portion Pa.
is covered. FIG. 14(a), Φ) is a modification of the second embodiment,
When the decorative sheet material A is thin, the decorative sheet material A can be punched out with the blade portion 22b+ of the recessed portion 22b without any hindrance.

That is, if the decorative sheet material A is thin, it will be difficult to punch out. In particular, when the air suction mandrel 12 is provided with a convex portion 12a as in the second embodiment, as shown in FIG. Although the thickness of the decorative sheet material A1 does not change, the portion of the decorative sheet material A2 that is in contact with the circular surface of the convex portion 12a is stretched and becomes thinner, and the blade portion 22b1 of the recessed portion 22b. It becomes difficult to punch out. For this reason, on the side of the core 22 where the recess 22b is provided, a raised portion 22b2 is provided that rises from the periphery of the recess 22b, thereby substantially reducing the height of the convex portion 12a. Here, the height of the raised portion 22b2 is set to 1/2 to 1/3 of the thickness of the synthetic resin molded product.

In this way, even if the decorative sheet material A is shaped along the inner surface of the cavity 11, the convex portions 12 of the decorative sheet material A
The portion A2 that contacts the circumferential surface of the blade portion 22b.a is not stretched much, and has almost no thickness different from the thickness of the portion A1 that contacts the tip end surface of the convex portion 12a. This makes punching easier.

[Third Embodiment] Figures 15 and 16 show a third embodiment of the present invention. In this third embodiment, a perforated part Pa is provided in a part of the synthetic resin molded product P', but as in the second embodiment, the inner peripheral surface of the perforated part Pa is covered with a decorative sheet material A. It shows the case where it is not done.

Note that the same parts as those shown in FIGS. 1 to 14 are designated by the same reference numerals, and the explanation thereof will be omitted.

Tip surface 12 of air suction insert l2 of first mold member IO
As in the case of the first embodiment, b is at the same height as the inner surface of the cavity l1, and a recess 1 is formed in the tip surface 12b.
It is shaped like 2c. Further, a convex portion 22c is provided on the end surface of the core 22 to be inserted into the concave portion 12c. Here, the height of the convex portion 22c is set so that it does not come into contact with the bottom surface of the concave portion 12c, and its tip surface is inclined. In this way, when the mold is clamped, the blade part 22aI provided on the step part 22a and the blade part 11 provided on the opening edge of the cavity l1.
In addition to punching out the decorative sheet material A by the ta action with a, the convex part 22c is inserted into the concave part 12c as shown in FIG.
At the time of this insertion, a blade 22c provided at the edge of the tip surface of the convex portion 22c, a blade 12c provided at the opening edge of the recessed portion 12c,
A predetermined portion of the decorative sheet material 8 can be punched out by the cooperative action.

Thereafter, by injecting and filling the molten synthetic resin, a synthetic resin molded crystal P' having a perforated part Pa not covered with the decorative sheet material A on the inner peripheral surface as shown in FIG. .

In addition, although the case where the tip of the convex part 22c is made into an inclined surface is shown, it may be formed into a flat shape, a concave shape, or a substantially M-shape.

[Fourth example] FIGS. 17(a) and 17(b) show a fourth embodiment.

In the first, second, and third embodiments, the decorative sheet material A is clamped and fixed between the first mold member IO and the fixed guide core 30.

This case is suitable when it is necessary to align the characters, patterns, etc. applied to the decorative sheet material A with the molded resin product. However, in the case of a single-colored decorative sheet material A, there is no need to align the letters, patterns, etc. with the molded resin product. This fourth embodiment is suitable for cases where there is no need to align the letters, patterns, etc. applied to the decorative sheet material A with the molded resin product. That is, a through hole 19 is provided in the first mold member 10 as shown in FIG. 14(a), and the decorative sheet material A is inserted into the through hole 19 using a known sheet material feeding device (not shown). It is fixed by positioning it in a tensile state. In other words, the sheet material feeding device is used as a sheet material fixing means. Therefore, from the first mold member lO to the stop pin 16,
Since the spring 18 and the like can be omitted, the first mold member 10 can be easily erected. In addition, instead of using the sheet material feeding device, as shown in FIG.
and the first mold member 10 to form the decorative sheet material A in the through hole l9.
may be supported and fixed.

Effects of the Invention> As explained above, according to the present invention, since the sheet material is punched out using the opening edge of the cavity provided in the first mold member and the core provided in the second mold member, The peripheral edge of the sheet material does not protrude from the synthetic resin product after the synthetic resin molding process, and there is no risk of spoiling the appearance.

Furthermore, if a pattern or the like is attached to the sheet material because the sheet material is heated after positioning, the pattern or the like can be accurately positioned at a predetermined position on the molded product. Furthermore, if the sheet material is heated at the same time as the molded product removal process, the shaping work efficiency can be improved.

[Brief explanation of the drawing]

1 to 8 show a first embodiment of the present invention,
1 to 7 are process explanatory diagrams, FIG. 8 is a partially enlarged explanatory diagram during punching of the decorative sheet material, and FIGS. 9 to 14 (al, (b) are illustrations of the second embodiment. 9 to 10 are process explanatory diagrams, FIG. 12 is a partially enlarged explanatory diagram during punching of a decorative sheet material, FIG. 13 is a sectional view of a synthetic resin molded product, and FIG. 14 ( a) and (b) are explanatory sectional views showing a modification of the second embodiment, and FIGS. 15 and 16 are explanatory sectional views showing the third embodiment, and FIGS.
FIGS. 7(a) and 7(b) are explanatory diagrams showing the fourth embodiment.

Claims (4)

[Claims] (1) A sheet material fixing step of opening one mold member having a cavity and the other mold member having a core inserted into the cavity and fixing the sheet material to the one mold member; a heating step of heating the sheet material fixed in the sheet material fixing step; a sheet material forming step of molding the sheet material heated in the heating step with one mold member; and a heating step of heating the sheet material fixed in the sheet material fixing step; When inserting the core of the other mold member, the sheet material is punched out by the opening edge of the cavity and the core, and the punched sheet material is fixed in the gap formed by the cavity and the core. 1. A method for molding a synthetic resin product covered with a decorative sheet, comprising: a step of molding a synthetic resin within the void. (2) The method for molding a synthetic resin product covered with a decorative sheet according to claim (1), characterized in that the heating step is performed simultaneously with a step of taking out the molded product from the mold. (3) A mold consisting of one mold member provided with a molding means for molding a sheet material, and the other mold member having a core inserted into the cavity; and a sheet in the one mold member. a fixing means for fixing the sheet material, and a heating means for heating the sheet material fixed by the fixing means, and the opening edge of the cavity of the one mold member and the other mold member inserted into the cavity. A blade portion for punching out the sheet material is provided in the core of the member, and when inserting the core into the cavity, the blade portion punches out the sheet material and the punched sheet material is inserted into the cavity formed by the cavity and the core. 1. A molding device for a synthetic resin product covered with a decorative sheet, characterized in that the device is configured to be fixed therein. (4) The apparatus for molding a synthetic resin product covered with a decorative sheet according to claim (3), wherein the heating means is provided in a take-out means for taking out the molded product from the mold.