JPH05200848A - Manufacturing method of laminated molded product - Google Patents

Abstract

(57) [Summary] [Purpose] It is an object of the present invention to provide a method for producing a laminated molded article, which is capable of thermoforming a thermoplastic resin plate and is laminated and integrated with a prepreg. [Structure] A spacer 3 is provided between a prepreg 1 made of a glass fiber reinforced UV curable resin and a thermoplastic resin plate 2, and the prepreg 1 and the resin plate 2 are sandwiched and fixed by a chamber 4 and a molding die 7 to form a spacer. A method of manufacturing a laminated molded product of a prepreg 1 and a resin plate 2 by pressurizing and depressurizing the space B, the chamber space A and the molding space C, in which the resin plate 2 is placed from the molding space C side. In the state of being heated and softened, the molding die space portion C is decompressed, and the resin plate 2 is applied to the product surface 73 of the molding die 7.
And the chamber space A and the spacer space B are decompressed while the pressure of the molding space C is continuously reduced, and then the chamber space A is opened or pressurized to the atmospheric pressure to form the prepreg 1 in the molding die 7. The resin plate 2 is adhered to the resin plate 2 and the prepreg 1 is irradiated with ultraviolet rays to be cured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a laminated molded article made of a composite material of a prepreg of a glass fiber reinforced UV curable resin and a thermoplastic resin plate.

[0002]

2. Description of the Related Art In general, two resin plates made of different materials are used to make the front and back different colors, and the surface is provided with a makeup such as a pattern or a pattern by a back print to manufacture a highly molded laminated product. Is being done.

Conventionally, as a method for producing this laminated molded article, a spacer is provided between two thermoplastic resin plates, and the thermoplastic resin plates are sandwiched and fixed by a chamber and a molding die. The spacer space portion formed between the plates, the chamber space portion formed between the thermoplastic resin plate and the chamber, and the space portions of the molding die space portion formed between the molding die and the thermoplastic resin plate There is known a method for producing a laminated molded article of a composite material by pressurizing and depressurizing and heating (for example, JP-A-63-30).
3719 gazette).

That is, in this molding method, the two thermoplastic resin plates are heated and softened, the spacer space is decompressed, the thermoplastic resin plates are joined and integrated, and then the chamber space and the molding die space are formed. By pressurizing and depressurizing, the desired laminated molded product is produced in the molding die.

[0005]

However, in the above-mentioned conventional molding method, when the prepreg of the glass fiber reinforced UV curable resin is used as one of the thermoplastic resin plates, the following inconvenience occurs. That is, since the prepreg contains a monomer component such as a styrene monomer, when it is softened by heating, the monomer component in the prepreg volatilizes. As a result, it becomes difficult to join and integrate the prepreg and the thermoplastic resin plate, and a laminated molded product in which voids are formed due to volatilization of the monomer component is formed.

Therefore, in order to avoid the direct heating of the prepreg, it is considered that the prepreg and the thermoplastic resin plate are preliminarily brought into close contact with each other to form a molded sheet.
That is, according to this formed sheet, it is possible to perform vacuum forming and pressure forming by heating only from the thermoplastic resin plate side during forming.

However, also in the case of this molded sheet, the heat from the thermoplastic resin plate side is transferred to the prepreg by heat conduction and volatilizes the monomer component, so that under certain limited molding conditions and molding materials. There is a disadvantage that it can only be used. Further, this molded sheet has a disadvantage that it cannot be stored for a long period of time because the monomer component in the prepreg permeates the thermoplastic resin plate over time and causes swelling of the thermoplastic resin plate.

The present invention has been made on the basis of the above findings, and is capable of producing a laminated molded article capable of forming a thermoplastic resin sheet by heating and laminating and integrating it with a prepreg of a glass fiber reinforced UV curable resin. It is intended to provide a way.

[0009]

A method for manufacturing a laminated molded article according to the present invention for solving the above-mentioned problems includes providing a spacer portion between a prepreg of a glass fiber reinforced UV curable resin and a thermoplastic resin plate. , The prepreg and the thermoplastic resin plate are sandwiched and fixed between the chamber and the molding die, a spacer space formed between the prepreg and the thermoplastic resin plate, a chamber formed between the prepreg and the chamber A method for producing a laminated molded product composed of a prepreg and a thermoplastic resin plate by pressurizing and depressurizing the space and the space of the molding die space formed between the molding die and the thermoplastic resin plate. Then, the thermoplastic resin plate is heated and softened from the molding die space side, and the molding die space portion is depressurized to bring the thermoplastic resin plate into close contact with the product surface of the molding die. After depressurizing the spacer space and the chamber space while continuing to depressurize, the chamber space is opened or pressurized to atmospheric pressure and the prepreg is brought into close contact with the thermoplastic resin plate of the molding die. The prepreg is irradiated with ultraviolet rays to be cured.

[0010]

According to the manufacturing method of the present invention, first, the thermoplastic resin plate is heated and softened from the molding die space side, and the molding die space is depressurized to form a thermoplastic resin on the product surface of the molding die. Since the plates are brought into close contact with each other, the heat of the prepreg is prevented by the heat insulation by the spacer space.

While the pressure in the mold space is continuously reduced, the spacer space and the chamber space are decompressed, and then the chamber space is opened or pressurized to atmospheric pressure so that the prepreg heats the mold. The prepreg can be laminated and integrated with the molded body of the thermoplastic resin plate that has been radiatively cooled by irradiating the prepreg with ultraviolet rays to cure the prepreg in close contact with the plastic resin plate.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. (A) Preparation of prepreg As shown in FIG.
A 0 μm polyvinyl alcohol (hereinafter, simply referred to as PVA) film 12 was provided to form a prepreg 1 having a thickness of 1 to 2 mm.

However, the prepreg layer 11 is 40 to 50
100 parts by weight of unsaturated polyester resin containing 45% by weight of styrene monomer (manufactured by Nippon Yupica Co., 4516)
A resin composition containing 10 parts by weight of a styrene monomer, 1.5 parts by weight of a thickener (MgO), and 1.0 part by weight of a curing agent (Irgacure 651, manufactured by Ciba-Geigy). Fiber (diameter, about 13 μm, length, about 25 m
m) was used to make the glass fiber content 25 to 30% by weight.

The peripheral portion of the prepreg 1 (see FIG. 2)
Since 10 is clamped and fixed at the time of molding, it was previously irradiated with ultraviolet rays and cured (it is convenient to do this). (B) Thermoplastic resin plate Kydax (Aryl modified thermoplastic resin plate manufactured by Tsutsunaka Plastics Co., Ltd.) having a thickness of 1, 1.5 and 3 mm was used. (C) Manufacture of Laminated Molded Product As shown in FIGS. 2 to 5, first, the prepreg 1 is prepared.
And a thermoplastic resin plate 2 are provided with a spacer 3 having an air supply port 31 and an exhaust port 32, and the prepreg 1, the spacer 3, the thermoplastic resin plate 2 are connected to the air supply port 41.
The chamber 5 having the exhaust port 42 and the clamp 5 are clamped and fixed. At this time, the prepreg 1 has a PV on the lower surface.
PVA film 1 only on the upper surface by peeling A film 12
2 is provided, and as shown in FIG. 2, the prepreg layer 1
1 and the thermoplastic resin plate 2 directly face each other.

Then, from the bottom surface of the thermoplastic resin plate 2, the infrared heater 6 heats the thermoplastic resin plate 2 to raise the temperature to the molding temperature (see FIG. 2). At this time, since the spacer space portion B is formed between the thermoplastic resin plate 2 and the prepreg 1, the heat insulation of the spacer space portion B with air prevents the prepreg 1 from being heated and the styrene monomer. Will be prevented from volatilizing.

Next, the peripheral edge of the opening of the molding die 7 having the air supply port 71 and the air exhaust port 72 and capable of supplying and exhausting air from the ventilation port 74 provided on the product surface is connected to the thermoplastic resin plate 2
Abut the bottom surface (see FIG. 3).

Then, an exhaust port 71 is provided by the vacuum pump 8.
By exhausting from the space, the mold space C formed in the mold 7 is depressurized and the spacer space B is opened to the atmospheric pressure.

Then, the thermoplastic resin plate 2 comes into close contact with the product surface 73 of the molding die 7, and a molded body of the thermoplastic resin plate 2 is molded (see FIG. 4).

After that, the thermoplastic resin plate 2 is sufficiently cooled. This cooling is performed by radiating heat to the molding die 7. As a method of positively cooling, the air supply port 31 and the exhaust port 32 provided in the spacer 3 are used to allow the space in the spacer space B to be reduced. It can be performed by circulating air.

Then, while continuing the exhaust from the exhaust port 71, the exhaust is also performed from the exhaust port 31 and the exhaust port 41, so that the chamber space A and the spacer space B are simultaneously depressurized. This pressure reduction is 160 mmHgab
It is desirable to make the vacuum state below s.

Thereafter, the exhaust from the exhaust port 41 is stopped and the air supply port 42 is opened to open the chamber space A to the atmospheric pressure.

Then, the prepreg 1 is deformed in the direction of the spacer space B and comes into close contact with the thermoplastic resin plate 2 of the molding die 7 (see FIG. 5). At this time, in order to improve the close contact state between the prepreg 1 and the thermoplastic resin plate 2, compressed air may be sent into the chamber space A to bring it into a pressurized state.

Finally, the ultraviolet ray lamp 9 is irradiated to cure the prepreg 1, and at the same time, the prepreg 1 is brought into close contact with the thermoplastic resin plate 2.

After demolding the molding die 7, the molding die 7
By cutting out a portion corresponding to the product surface 73, a laminated molded product (not shown) is obtained.

The spacer 3 is reused by removing it from the laminated body (not shown) after taking out the laminated molded product (not shown). However, the spacer 3 is made of a stretchable elastic material, As shown in FIG.
In addition, if the frame 35 is provided so that it can be supplied and exhausted through the air supply / exhaust port 34 and is configured to be separable, this removal can be easily performed. Further, as shown in FIG. 7, the air supply port 1 is provided in the spacer portion 36 including a step portion formed in the peripheral portion 10 of the prepreg 1 in the cured state.
By forming 4 and the exhaust port 15, it is possible to perform molding without using the separate spacer 3, and it is possible to omit the work of removing the spacer 3.

Further, the prepreg 1 is not limited to the prepreg 1 as shown in the present embodiment, but it is a prepreg 1 which can be subjected to normal vacuum forming, and its adhesiveness with the thermoplastic resin plate 2 can be secured. If it is a thing, the prepreg 1 of various compounding can be used.

Further, the thermoplastic resin plate 2 is not limited to the thermoplastic resin plate 2 as shown in this embodiment, and any thermoplastic resin plate 2 that can be heat-molded and the adhesiveness with the prepreg 1 can be secured. The thermoplastic resin plate 2 having various materials and thicknesses can be used.

[0028]

As described above, according to the present invention, the thermoplastic resin plate can be thermoformed while the prepreg is prevented from being heated, and the prepreg and the thermoplastic resin plate are combined with each other. Since it is possible to laminate and integrate by pneumatic molding, it is possible to obtain a good laminated molded product in which bubbles are not generated due to heating of the prepreg.

Further, since the thermoplastic resin plate can be thermoformed, it is possible to easily perform pneumatic molding without narrowly limiting the applicable range of the material, thickness and molding conditions of the thermoplastic resin plate. ..

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing the outline of the overall configuration of a prepreg.

FIG. 2 is a cross-sectional view showing a step of heating a thermoplastic wood board in a method for manufacturing a laminated molded product.

FIG. 3 is a cross-sectional view showing a state before molding of a thermoplastic wood board in a method for manufacturing a laminated molded product.

FIG. 4 is a cross-sectional view showing a state after molding of a thermoplastic resin board, that is, before molding of a prepreg in a method for manufacturing a laminated molded product.

FIG. 5 is a cross-sectional view showing a state after molding a prepreg in a method for manufacturing a laminated molded product.

FIG. 6 is a perspective view showing another embodiment of the spacer.

FIG. 7 is a perspective view showing another embodiment of the prepreg.

[Explanation of symbols]

 1 Prepreg 2 Thermoplastic Resin Plate 3 Spacer 4 Chamber 7 Mold 73 Product Surface A Chamber Space B Spacer Space C Mold Space

Claims (1)

[Claims] 1. A spacer is provided between a prepreg of a glass fiber reinforced UV curable resin and a thermoplastic resin plate, and the prepreg and the thermoplastic resin plate are sandwiched and fixed between a chamber and a molding die, A spacer space formed between the prepreg and the thermoplastic resin plate, a chamber space formed between the prepreg and the chamber, and a molding die space formed between the molding die and the thermoplastic resin plate. A method for producing a laminated molded product comprising a prepreg and a thermoplastic resin plate by pressurizing and depressurizing each space part, wherein the thermoplastic resin plate is heated and softened from the mold space part The mold space is depressurized, the thermoplastic resin plate is brought into close contact with the product surface of the molding die, and the spacer space and chamber space are depressurized while continuing to depressurize the molding space. After that, the chamber space is opened to the atmospheric pressure or pressurized to bring the prepreg into close contact with the thermoplastic resin plate of the molding die, and in this state, the prepreg is irradiated with ultraviolet rays to be cured, thereby producing a laminated molded article. Production method.