JPH0811200A - Vacuum press laminate molding method and apparatus - Google Patents

Abstract

PURPOSE:To reduce the expansion or wrinkles of an outer surface by forming a decorative sheet into a spherical surface shape expanding toward a molded base material by the pressure difference between both chambers and gradually bringing the lower end extreme point part of the decorative sheet formed into a spherical surface shape into contact with the upper surface and outer periphery of the molded base material in succession. CONSTITUTION:After a decorative sheet 1 is set, a heater 15 is operated to heat a rubbery elastic film 14 and the chamber 11 on the side of the sheet is allowed to fall to perform mold clamping. Next, compressed air is supplied to the chamber 11 to pressurize the same while the chamber on the side of a base material is evacuated. When pressure difference is generated between both chambers 11, 21, the pressing force of the rubbery elastic film 14 is applied to the decorative sheet 1 and the decorative sheet l is stretched into a spherical surface shape toward the molded base material 5 from its outer peripheral edge being the part received by a sheet support jig 30 to be downwardly curved. When the decorative sheet 1 curved into a spherical surface shape is gradually brought into contact with the molded base material 5 from its lower extremity point part toward the outer periphery of the base material 5, the air present between the decorative sheet 1 and the molded base material 5 is easily expelled to the outside.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a transfer in which a pattern or the like is applied to the outer surface of a molded base material having a three-dimensional shape such as cabinets of various audio / visual equipments, doors and other fittings, furniture, containers and the like. The present invention relates to a vacuum press laminating method and apparatus suitable for laminating and laminating decorative sheets such as sheets and adhesive sheets.

[0002]

2. Description of the Related Art As a device for laminating a decorative sheet by adhering it to the outer surface of a molding substrate, for example, a vacuum press laminating device 50 as shown in FIG. 7 is known (Jitsuko Sho 46-9276). No. 6, Japanese Patent Sho 60-8924, Japanese Patent Sho 6
0-58014, etc.).

In brief, this apparatus 50 supports and fixes the seat side chamber (upper mold) 11 in which a rubber-like elastic film 14 is stretched so as to close the lower surface opening, the molding base material 5 and it. And a suction table 22 having a required number of ventilation holes 23, in which a table 6 for
It has a base material side chamber (lower mold) 21 in which the decorative sheet 1 is stretched and held so as to close the upper surface opening, and as shown in FIG. 8, the seat side chamber 11 is lowered to the base material side chamber 21 side. Then, the molds are clamped, the rubber-like elastic film 14 is heated by the heater 15, and the air in the substrate-side chamber 21 is vacuum-sucked and the inside of the seat-side chamber 11 is pressurized as necessary. , The rubber-like elastic film 14 is pressed against the decorative sheet 1 by causing a pressure difference between the two chambers, and the decorative sheet 1 is softened by the heat of the rubber-like elastic film 14 as shown in FIG. The decorative sheet 1 is stretched to be pressed and adhered to the outer surface of the molding substrate S (FIG. 9).

This device can be applied regardless of whether the decorative sheet is a sticking sheet or a transfer sheet. When the decorative sheet is a transfer sheet, the decorative sheet 1 is adhered and the transfer portion is left, so that releasability is improved. Only the base sheet is peeled off. According to the conventional vacuum press lamination molding apparatus as described above, not only the pressure difference between the chambers but also the pressing force by the rubber-like elastic film is applied to the decorative sheet, and the decorative sheet is heated by the rubber-like elastic film. The decorative sheet can be pressed against the molding substrate and softened by heating sufficiently and uniformly, and good moldability should be obtained.

[0005]

However, when a decorative sheet is actually adhered to a molding substrate by such a method and laminated molding is performed, as shown in FIG. 10, the molding substrate 5 and the decorative sheet 1 are laminated at the time of lamination molding. The air existing between and may not be completely exhausted and may remain in the form of bubbles (K). Due to the residual bubbles K, the outer surface of the product swells,
There has been a problem that transfer defects, wrinkles and other molding defects occur. Even if the residual bubbles are inconspicuous at the completion of the lamination molding, they may cause back blister, peeling, etc. depending on the subsequent temperature conditions and the like, which significantly deteriorates the quality of the obtained molded product.

The following can be considered as the cause of this. That is, in the conventional vacuum press lamination molding method, the decorative sheet 1 is brought into contact with the molding substrate 5 during preheating when the decorative sheet is heated (preheated) by the rubber-like elastic film to be in a softened state and due to the pressure difference between both chambers. During the initial bonding process, the decorative sheet 1 hangs downwardly. In this case, the decorative sheet 1 has a curved surface with a large radius of curvature (the degree of curvature is gentle), and since the tension is still small at this time, it makes weak surface contact with the entire upper surface of the molding substrate 5 almost simultaneously (state of FIG. 8). ). At this time, a small amount of air is trapped between the molding substrate 5 and the decorative sheet 1. Further, the decorative sheet is brought into contact with the molding substrate 5 with some wrinkles and distortions.

However, at this time, the adhesive layer disposed on the back surface side of the decorative sheet 1 or on the outer surface of the molding substrate 5 is activated or the adhesive property (fusion property) of the decorative sheet 1 itself is developed. A decorative sheet 1 even during lamination molding
Is partially bonded to the molding substrate 5. When the decorative sheet 1 is thus bonded, even if vacuum suction is performed, the air remaining inside the bonded portion cannot be sucked and degassed to the outside. Therefore, even after the completion of the lamination molding, the air remains as bubbles.

Further, the decorative sheet which has been once wrinkled or strained and deformed does not return to its original shape because of the adhesive. Due to these reasons, the wood-based molded product (MD
In the case of F) or the like, air remaining between the molding base material and the decorative sheet can be degassed to the outside through the molding base material by vacuum suction. In the case of synthetic resin molded products, ceramics, etc., it is impossible to deaerate, so air bubbles remain, and molding defects such as swelling, transfer defects and wrinkles occur on the outer surface of the product.

In view of the above points, the present invention provides a decorative sheet with not only a pressure difference between chambers but also a pressing force by a rubber-like elastic film in order to solve the above-mentioned problems in the conventional vacuum press lamination molding method and apparatus. In addition to heating the decorative sheet with a rubber-like elastic film, it is possible to prevent air from remaining between the molding substrate and the decorative sheet, resulting in blistering on the outer surface, poor transfer, and wrinkling. It is an object of the present invention to provide a vacuum press laminating method and apparatus capable of reducing the above problems as much as possible.

[0010]

In order to achieve the above-mentioned object, the vacuum press lamination molding method according to the present invention is performed on a suction table provided in a box-shaped substrate-side chamber having an open top surface. While arranging the base material, arranging a decorative sheet on the molding base material at a predetermined interval so as to close the upper surface opening of the base material side chamber, and closing the lower surface opening of the sheet side chamber. By disposing the rubber-like elastic film disposed so as to face the decorative sheet, heating the rubber-like elastic film, and causing a pressure difference between the sheet-side chamber and the substrate-side chamber, The decorative sheet is softened by a rubber-like elastic film and is pressed against the outer surface of the molding substrate so that the decorative sheet adheres to the molding substrate. Both sides The spherical shape is such that it projects to the side of the forming base material due to the pressure difference between the chambers, and the lowermost pole portion of the spherical decorative sheet is first brought into contact with the upper surface of the forming base material, and then the lower end. It is characterized in that the poles are gradually brought into contact with each other and bonded to the outer circumference.

Further, the vacuum press lamination molding apparatus according to the present invention is for carrying out the above-mentioned method, and is provided on a suction table provided in a box-shaped substrate-side chamber having an open top surface.
A height above the upper surface of the molding base is received so as to receive the portion closer to the center than the peripheral edge of the decorative sheet holding the peripheral edge and to surround the molding base placed on the suction table. The present invention is characterized in that the tubular seat bearings that it has are arranged.

In carrying out the above-described vacuum press lamination molding method of the present invention, the vacuum press apparatus known in the related art can be used as it is for the basic components. The decorative sheet to be bonded and laminated in the method of the present invention is a synthetic resin transfer sheet and a sticking sheet (sticking laminated sheet).
It may also be a sheet-like material other than resin, and an adhesive layer formed or coated on the back side thereof or an adhesive layer formed or coated on the molding substrate side, and further The adhesive property of itself is activated or expressed by heat or the like to adhere to the molding substrate.

The transfer sheet is composed of a releasable base sheet and a transfer layer, and the base sheet is made of a material to be transferred (molded base material) such as a resin molded product produced by injection molding. When the surface is generally curved, polyamides such as nylon 6 and nylon 66, polyolefins such as polyethylene and polypropylene, low crystalline polyesters such as polyethylene terephthalate, polyethylene terephthalate-isophthalate copolymer, polyvinyl chloride, vinylon, etc. ,
A thermoplastic resin film having flexibility or a laminate of these is appropriately used, and as a release layer provided as necessary, flexibility, heat resistance during molding, baking of a release layer and a transfer layer are used. A thermosetting acrylic for the purpose of preventing sticking, etc.
It is preferable to use one kind or a mixture of two or more kinds of resins such as melamine, urethane, polyester, aminoalkyd, and epoxy. On the other hand, the decorative transfer layer is usually composed of only a pattern layer (however, a thermoplastic resin is used as a binder and also serves as a heat-sensitive adhesive layer, and a dye, a pigment, etc. are added), a pattern layer and a heat-sensitive adhesive layer. , A release layer, a pattern layer, and a heat-sensitive adhesive layer,
There are those comprising a release layer and a pattern layer, and these are appropriately used natural or synthetic resins such as a cellulose resin, a styrene resin, an acrylic resin, a vinyl resin, a rosin ester resin and a polyamide resin. A printing ink pattern, partial metal vapor deposition of aluminum or the like is applied to the.

The laminating laminated sheet is composed of a base sheet and a heat-sensitive adhesive layer, and is used for various pattern printing, metal deposition, etc. in order to impart design property and industrial function to the base sheet. Decorative treatment, chemical or physical treatment, etc. are appropriately applied. In addition, the heat-sensitive adhesive layer can be omitted when the laminating laminated sheet itself has adhesiveness and when the adhesive layer is formed or coated on the molding substrate side, and in that case, it is necessary. Corona discharge treatment, various primer coatings, and the like may be performed according to the above in order to improve the adhesiveness to the molding substrate. The material of the base material sheet is a film having thermoplasticity, and in addition to the material of the releasable base material sheet, acrylic resin, ABS (acrylonitrile-butadiene-styrene copolymer), or polystyrene can also be used. In this case, releasability is unnecessary.

For the heat-sensitive adhesive layer used for adhering the above-mentioned transfer sheet and laminating laminated sheet, a thermoplastic resin, an ionomer or the like can be appropriately used. As the resin, for example, ethyl cellulose, cellulose nitrate, cellulose acetate, ethyl hydroxyethyl cellulose, a cellulose derivative such as cellulose acetate propionate, polystyrene, a styrene resin such as poly α-methylstyrene or a styrene copolymer, polymethyl methacrylate, Polyethyl methacrylate, polyethyl acrylate,
Acrylic resin such as polybutyl acrylate, polyvinyl chloride, polyvinyl acetate, vinyl chloride-vinyl acetate copolymer, ethylene-vinyl alcohol copolymer, vinyl polymer such as polyvinyl butyral, rosin, rosin modified maleic acid resin, Examples thereof include rosin-modified phenol resin and rosin ester resin such as polymerized rosin.

Further, the molding substrate to be adhered in the vacuum press lamination molding method of the present invention is not only a plate-like body such as a flat plate or a curved plate but also a relatively complicated three-dimensional object having an uneven portion or the like. Well, the material is not particularly limited, and may be any of wood, synthetic resin, metal, ceramics, etc., but the feature of the present invention is that the three-dimensional synthetic resin molded article having no breathability,
It is used for metal moldings, non-air-permeable porcelain, hard porcelain, glazed porcelain, etc. In this case, examples of the material of the synthetic resin molded product include ABS, polystyrene, acrylic, polyvinyl chloride, phenol resin and the like.

On the other hand, the sheet supporting member used in the vacuum press laminating apparatus according to the present invention can surround the molding base material placed on the suction table and has a height exceeding the upper surface of the molding base material. If it has a cylindrical shape, its material,
Regardless of the shape, it is lower than the height position of the peripheral edge of the decorative sheet set in the base material side chamber (upper edge of the peripheral wall of the base material side chamber), and the molding base is placed in the opening in plan view. All materials need to be stored. Under that condition, it is more preferable that the projected area in plan view (the area of the portion that receives the decorative sheet) is large.

[0018]

[Operation] In the vacuum press lamination molding method according to the present invention configured as described above, not only the pressure difference between the chambers but also the pressing force by the rubber-like elastic film is applied to the decorative sheet and the rubber-like elastic film is formed. The decorative sheet is heated through the heating to evenly soften the decorative sheet and to give a sufficient and uniform pressing force to the decorative sheet. In doing so, for example, a cylindrical sheet support having a height exceeding the upper surface of the molding substrate is arranged on the suction table so as to surround the molding substrate.

In this state, for example, when the inside of the substrate side chamber is vacuum-sucked and a pressure difference is generated between the two chambers by supplying compressed air to the sheet side chamber, the decorative sheet is heated and softened by the rubber-like elastic film. Because of the pressure difference between the two chambers, they are projected so as to project toward the molding substrate. Here, in the decorative sheet that is projected so as to project toward the molding substrate side, the portion closer to the center than the peripheral edge portion is received by the sheet support. Therefore, when the pressure difference between the two chambers is further increased, the decorative sheet extends toward the molding substrate side in a spherical shape with the portion received by the sheet support member as the outer peripheral edge. in this case,
Since the decorative sheet has a spherical shape with a small radius of curvature and a larger tension (tension) as compared with the case without the sheet supporting member, first, only the lower end pole part of the base material comes into contact with the upper surface of the forming base material. Then, contact is gradually made from the lower end pole portion to the outer peripheral side.

As described above, when the spherically shaped decorative sheet gradually comes into contact with the molded base material from the lowermost pole portion toward the outer peripheral side, the decorative sheet is subjected to a relatively large tension. The air existing between the decorative sheet and the molding substrate is easily expelled to the outside by the decorative sheet, and the decorative sheet is bonded to the molding substrate without leaving air between them.

Since the decorative sheet is adhered to the molding base material while the wrinkles and distortions are extended, it can be adhered without causing wrinkles and distortions. Therefore, even if the molding substrate is a metal product, synthetic resin molded product, ceramics, etc. that does not have air permeability, air bubbles do not remain between the decorative sheet and the molding substrate, and therefore the outer surface of the product It is possible to obtain a high-quality decorated product without forming defects such as swelling, transfer defects, and wrinkles.

[0022]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. FIG. 1 shows a main part of an example of a vacuum press laminating apparatus used for carrying out the method of the present invention. Vacuum press lamination molding apparatus 10 in the illustrated example
Has the same basic configuration as the conventional device 50 shown in FIG. 7 described above.

The vacuum press lamination molding apparatus 10 of FIG. 1 has a piston rod 13 in a fluid pressure cylinder apparatus 12 with an automatic lock function which is supported by a support frame (not shown).
It has a seat side chamber 11 which is connected to a tip end and is vertically moved up and down, and a base material side chamber 21 which is mounted on a stationary machine base (not shown) so as to face the seat side chamber 11. ing.

The seat-side chamber 11 has a box-like shape with an open lower surface, and a rubber-like elastic film 14 made of silicon rubber or the like having heat resistance and stretchability is stretched over the lower surface opening so as to close it. A plurality of infrared or far-infrared type heaters 15 are attached to the ceiling surface portion in a predetermined manner, and one side surface portion is provided with a supply / discharge device for supplying / discharging air to / from the chamber 11. A port 16 is formed.

On the other hand, the base material side chamber 21 has a box shape with an open upper surface, and the decorative sheet 1 is provided on the upper end of the peripheral wall 21a.
The peripheral portion of the sheet is fixed and stretched by an appropriate means, the upper surface opening is closed by the decorative sheet 1, and a large number of through holes 23 are formed in the inside in a predetermined arrangement state. The plate-shaped suction table 22 is attached, and the chamber 21 is attached to the lower part of one side surface.
Air supply / exhaust port 26 for supplying / exhausting air to / from
Are formed. Further, a base material mounting base 6 for supporting and fixing the molding base material 5 at the time of laminate molding is attached to the central portion on the upper surface side of the suction mounting base 22. Although the mounting table 6 can be omitted, it is preferable to use the mounting table 6 in order to extend the decorative sheet along the side surface of the molding substrate 5 and partly the back surface thereof. Base material 5
It is preferable to use the mounting table 6 having a narrower width.

Although not shown, the supply / discharge ports 16 and 26 are configured to be selectively connected to a compressor and a vacuum pump through three-way switching valves, respectively. Substrate side chamber 2
The inside of 1 can be depressurized or pressurized from the state of being open to the atmosphere, or can be maintained at a constant pressure. Further, the heat generation amount of the heater 15 can be controlled by controlling the power supply amount, power supply time, phase distribution angle, and the like.

In this example, the suction table 22 provided in the base material side chamber 21 receives a portion of the decorative sheet 1 whose peripheral portion is held at the time of adhesive molding, closer to the center than the peripheral portion. In addition, a cylindrical sheet supporter 30 having a predetermined height is arranged so as to surround the molding substrate 5 arranged on the suction table 22. Here, as shown in FIG. 3, the seat support 30 has a cylindrical truncated cone shape in which a side view has a trapezoidal shape so that a projected area in plan view (an area of a portion for receiving the decorative sheet 1) becomes large. And as shown in FIG. 1, its height Hb
Is lower than the height Ha (upper end of the peripheral wall of the base material side chamber) of the peripheral portion of the decorative sheet 1 set in the base material side chamber 21 from the upper surface of the suction base 22, and the upper surface of the molding base material 5. Is set to exceed the height Hc. In addition,
The height Hb of the seat support 30 is set to be lower than the height Ha of the peripheral edge of the decorative sheet 1 when the height Hb is set higher than the height Ha so that the decorative sheet 1 will be attached when the decorative sheet 1 is set.
This is because it is pushed up by 0 and is subjected to an undesired deformation, and the height Hc of the upper surface of the molding substrate 5 is set lower than that, so that the sheet supporting member 30 is prior to the sheet supporting member 30 at the time of adhesive molding. This is because the decorative sheet 1 comes into contact with the molding base material 5 and does not serve as a support tool.

The size (area) and shape of the opening portion of the support 30 in plan view are set so that the molding substrate is entirely accommodated inside the opening in plan view. Next, the vacuum press laminating apparatus 10 having the above-mentioned configuration
An example of carrying out the vacuum press lamination molding method according to the present invention will be described with reference to FIG. In this example, first, as shown in FIG. 1, a molded base material made of synthetic resin having a three-dimensional shape and having no air permeability on the base material mounting table 6 arranged on the suction mounting table 22 of the base material side chamber 21. 5 is positioned and installed. The molding substrate 5 is coated with a heat-sensitive adhesive on its outer surface. Further, the decorative sheet 1 is fixed and stretched on the upper end of the peripheral wall 21a of the base material side chamber 21 by an appropriate means. At this stage, the decorative sheet 1 is applied to the molding substrate 5.
Are spaced apart by a predetermined distance.

After the decorative sheet 1 is set, or before the heater 15 is activated, the rubber-like elastic film 14 is heated and the seat side chamber 11 is lowered to perform mold clamping (see FIG. 1 (solid line), the decorative sheet 1 is superposed on the rubber-like elastic film 14 and preheated. At this time, if necessary, in order to prevent the decorative sheet 1 from hanging down, as shown by the alternate long and short dash line in FIG.
Thereby, the rubber-like elastic film 14 and the decorative sheet 1 are drawn into the seat side chamber 11 so as to be convex upward while being overlapped. This state is continued for about 20 seconds, whereby heat of the rubber-like elastic film 14 is gradually conducted to the decorative sheet 1, and the decorative sheet 1 is heated and softened.

Next, when pressure-supplied air is supplied to the sheet-side chamber 11 to pressurize it and the substrate-side chamber 21 is vacuum-sucked to reduce the pressure, a pressure difference is generated between the chambers 11 and 21, as shown in FIG. The rubber-like elastic film 1
The pressing force of 4 is applied to the decorative sheet 1, so that the decorative sheet 1 is softened and stretched together with the rubber-like elastic film 14 and is projected downward so as to project toward the molding substrate 5 side.

Here, the decorative sheet 1, which is projected so as to project toward the molding substrate 5, has a portion closer to the center than the peripheral edge thereof received by the sheet support member 30.
Therefore, when the pressure difference between the two chambers 11 and 21 is further increased, the decorative sheet 1 is extended spherically toward the molding substrate 5 side with the portion received by the sheet support 30 as the outer peripheral edge. Go out to the bay. In this case, the decorative sheet 1 has a spherical shape with a small radius of curvature and a large tension (tension) as compared with the case without the sheet supporting member 30, and therefore, as shown in detail in FIG. First of all, the bottom pole point A is formed on the upper surface of the molding substrate 5.
Only the part (central part) contacts, and then the lower end pole A
The portion gradually comes in contact with the outer peripheral side, such as a portion B near the portion, and a portion C outside the portion B.

In this manner, when the spherically shaped decorative sheet 1 gradually contacts the molding substrate 5 from the lower end pole point A portion to the outer peripheral side, the decorative sheet 1 is applied with a relatively large tension. As a result, the air existing between the decorative sheet 1 and the molding substrate 5 is easily expelled to the outside by the decorative sheet 1, and the decorative sheet 1 is molded while the wrinkles are extended and no air remains between them. It will be adhered to the base material 5.

In this example, the rubber-like elastic film 14 is used.
The decorative sheet 1 has a pressing force of about 3 kg / square centimeter, a pressing time of about 120 seconds, and a heating temperature of 120.
As a result, as shown in FIG. 5, a part of the upper surface, the side peripheral surface, and the lower surface of the molding base material 5 is stretched by extending the inner portion of the decorative sheet 1 from the sheet support 30. It goes around and is bonded.

By doing so, the molding substrate 5
Even if the product is a non-breathable metal product, synthetic resin molded product, ceramics, etc., bubbles do not remain between the decorative sheet 1 and the molding substrate 5, and therefore, swelling and transfer to the outer surface of the product It is possible to obtain a high-quality decorated product without defective molding such as defects and wrinkles. Actually, using the conventional vacuum press lamination molding apparatus 50 as shown in FIG. 7 and the vacuum press lamination molding apparatus 10 according to the present invention as shown in FIG. 1, the following (a), ( A comparative experiment was performed using the material of b).

(A) As a molding base material 5, a video front panel made of ABS is used, and as the decorative sheet 1, PVC: 0.
1 mm thick, as a transfer layer, a solid print of nitrocellulose ink / a solid print of acrylic ink / a pattern of a mixed ink of acrylic and vinyl chloride / vinyl acetate / a solid print of a mixed ink of acrylic and vinyl chloride The attachment transfer sheet was subjected to adhesive lamination molding, and after molding, only the PVC sheet was peeled off. (B) MDF video side panel as the molding substrate 5, PVC: 0.1 mm thick as the decorative sheet 1, and a nitrocellulose-based ink pattern / polyamide-based solid printing solid transfer as the transfer layer The sheet was adhesively laminated and molded, and after molding, only PVC was peeled off.

When the above-mentioned (a) and (b) were bonded and laminated by the conventional apparatus 50 and the apparatus 10 of the present invention in the same manner as described above, the conventional apparatus 50 and the present invention are used in the materials and modes of the above (b). In any of the devices 10, bubbles and the like did not remain between the decorative sheet 1 and the molding base material 5, and molding defects did not occur. However, in the material / mode of the above (a), in the conventional device 50, bubbles, wrinkles, etc. remained, and a molding defect such as partial removal of the handle occurred. On the other hand, in the device 10 of the present invention, the molding substrate 5 is made of an AB material having no air permeability.
Despite being an S-molded product, bubbles do not remain between the decorative sheet 1 and the molding substrate 5, and high-quality decorative molding without blister on the outer surface of the product, defective transfer, wrinkles, or other defective molding. Goods have been obtained.

In the above embodiment, by using the sheet support member 30, the decorative sheet 1 is formed into a spherical shape so as to project to the molding substrate 5 side, and the decorative sheet 1 first formed into the spherical shape. The lower end pole point portion is brought into contact with the upper surface of the molding base material 5, and then the lower end pole point portion is gradually brought into contact with the outer peripheral side so that the residual air between the decorative sheet 1 and the molding base material 5 is expelled and bonded. However, it is not always necessary to use the seat support, and other means may be taken.

The seat support 3 used in the above embodiment
Although 0 has a cylindrical truncated cone shape with a C-shaped cross section, it may have a shape as shown in FIGS. 6A to 6E instead. In this case, FIG.
The seat support 31, 32, 33, 34 of (D) is designed so that the projected area (the area of the portion receiving the decorative sheet 1) in plan view is larger than that of the seat support 30. The seat support 35 shown in FIG. 6 (E) has a larger area for receiving the decorative sheet 1.
As described above, the laminate moldability is improved as compared with the case where the decorative sheet 1 is received only on the upper surface.

[0039]

As can be understood from the above description, according to the vacuum press lamination molding method and apparatus of the present invention, not only the pressure difference between the chambers but also the pressing force by the rubber-like elastic film is applied to the decorative sheet and the rubber is pressed. Since the decorative sheet is heated via the elastic elastic film, it is possible to uniformly heat and soften the decorative sheet, and in addition to being able to give a sufficient and uniform pressing force to the decorative sheet,
Since the air existing between the decorative sheet and the molding base is pushed out by the decorative sheet to the outside and the wrinkles are stretched and adhered, air is not left between the molding base and the decorative base. It is possible to reduce swelling of the outer surface, transfer defects, wrinkles, etc. as much as possible, and it is possible to significantly improve the quality of the obtained molded product.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram used for explaining a main part of an example of a vacuum press lamination molding apparatus used when carrying out a method of the present invention and a procedure of an embodiment of the present invention.

FIG. 2 is a diagram which is used for describing a procedure of an example of the present invention.

FIG. 3 is a schematic perspective view showing a seat support used in an embodiment of the present invention together with a substrate side chamber.

FIG. 4 is a schematic partial enlarged view for explaining the operation of the embodiment of the present invention.

FIG. 5 is a diagram which is used for describing a procedure of an example of the present invention.

FIG. 6 is a view showing another example of the seat support tool used in the present invention.

FIG. 7 is a diagram provided for explaining a configuration and a procedure of a conventional vacuum press laminating apparatus.

FIG. 8 is a diagram provided for explaining a procedure of a conventional vacuum press laminating apparatus.

FIG. 9 is a diagram provided for explaining a procedure of a conventional vacuum press laminating apparatus.

FIG. 10 is a schematic partial enlarged view for explaining a problem in the case of performing laminate molding by a conventional vacuum press laminate molding apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Decorative sheet 5 ... Molding base material 6 ... Base material mounting base 10 ... Vacuum press lamination molding apparatus 11 ... Sheet side chamber 12 ... Cylinder device 14 ... Rubber-like elastic film 15 ... Heater 16, 26 ... Supply / discharge port 21 ... Base Material side chamber 22 ... Suction table 23 ... Through holes 30-34 ... Sheet support

Claims (2)

[Claims] 1. A molding base material is placed on a suction table provided in a box-shaped base material side chamber having an open top surface, and the molding base is arranged to close the top surface opening of the base material side chamber. A decorative sheet is arranged on the material at a predetermined interval, and a rubber-like elastic film arranged so as to close the lower surface opening of the sheet side chamber is arranged to face the decorative sheet,
By heating the rubber-like elastic film and causing a pressure difference between the sheet-side chamber and the substrate-side chamber, the rubber-like elastic film softens the decorative sheet and the outside of the molding substrate. In a vacuum press lamination molding method of pressing and adhering to a surface, in adhering the decorative sheet to the molding substrate, a spherical surface that overhangs the decorative sheet toward the molding substrate side due to a pressure difference between the chambers. Characterized in that the lower end pole point portion of the spherical decorative sheet is first brought into contact with the upper surface of the molding substrate, and then the lower end pole point portion is gradually brought into contact with the outer peripheral side for adhesion. Vacuum press lamination molding method. 2. A suction table provided in a box-shaped substrate-side chamber having an open top surface, which receives a portion of the decorative sheet whose peripheral portion is held closer to the center than the peripheral portion, and the suction table. 2. A method for carrying out the method according to claim 1, wherein a tubular sheet support having a height above the upper surface of the molding substrate is arranged so as to surround the molding substrate arranged above. Vacuum press lamination molding equipment.