JPH0464287B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a pressure press apparatus for molding fiber-reinforced composite materials and various other press-molded materials by heating and pressurizing them.

(Prior Art) The application of various composite materials is expanding in all industries such as aircraft and automobiles, and to explain the conventional pressure molding of fiber-reinforced composite materials generally called FRP, In order to expel gas pockets and excess resin between the laminated materials and harden and mold them, a pressure source as well as a heating source is essential for the molding, and as shown in Figure 5 A and B, an exhaust port b ₁
The composite material a on the tool c covered with the film b is placed in an autoclave d, and the composite material a in the autoclave d is heated with a heating fluid e and pressurized with nitrogen gas g at the same time to form a film b. It has become common practice to use an autoclave, which exhausts air, etc. in the composite material a through an exhaust port _b1 , hardens it, and then molds it. In addition, f in the figure is a circulation fan.

(Problems with the prior art) The conventional autoclave molding apparatus is expensive, large-scale equipment, and the cost is high.
Processing costs increase because a pressurized medium such as nitrogen gas is used, and it is necessary to separately control pressurization and heating. It is necessary to move tools, products, etc. in and out, which requires complicated operations, and there are problems such as variations in processing accuracy and lack of reliability.

(Objective of the invention, means for solving problems) The present invention was developed to solve the above-mentioned problems, and includes a base on which a pressurized material is placed, and a base on which a pressurized material is placed. An upper mold fixed thereon and covering the pressurized molding material, an airtight bag containing liquid disposed in a space formed by the base and the upper mold, and a heating mechanism for the liquid. The upper mold is fixed on the base, the pressurized molding material and the airtight bag containing liquid are placed in the space formed by the base and the upper mold, and the heating mechanism By heating the liquid, the structure of the device can be significantly simplified and made more compact, and the operation of putting in and out of pressurized molding materials, products, etc. can be made simple and easy. In addition, by controlling only the heating of the liquid, the heating and pressurization of the pressurized material can be easily and accurately controlled, and processing costs are significantly reduced due to no consumption of nitrogen gas, etc., and less power consumption. It is an object of the present invention to provide a pressurizing press device which has significantly improved machining accuracy, reliability, and machining efficiency, and which solves the above-mentioned problems.

(Embodiment) An embodiment of the present invention is shown in Figs. 1 to 4, and the pressure press device of the present invention places a pressurized molded material a such as a fiber-reinforced composite material. a base tool 1, an upper mold 2 fixed on the base 1 by appropriate detachable fixing means and covering the pressurized material a, a base 1, and the base 1. An airtight bag 3 containing a liquid 10 placed together with the pressurized molding material a in a space formed by the upper die 2 placed and fixed thereon, and a heating mechanism 5 for the liquid 10. The airtight bag 3 is made of expandable rubber or plastic film to seal the vapor pressure generated together with the liquid 10, and the heating mechanism 5 is airtight as shown in FIG. It is possible to configure a heater 5a, a seat heater 5b, etc., which are installed in the seat portion of the bag 3.

In addition, if necessary, as shown in Figure 3, the base 1
Place a heat insulating material 6 on top to prevent heat leakage,
Alternatively, as shown in FIG. 4, the pressurized molded material a placed on the base 1 may be covered with a film 7 provided with a discharge port 7a and fixed.

Furthermore, to explain in detail the method of pressurizing the pressurized molded material a using the pressure press apparatus, first, the pressurized molded material such as a laminated material is laminated in a predetermined shape on the base 1. At the same time, an airtight bag 3 containing a liquid 10 is placed on the pressurized molding material a, and an upper mold 2 is placed on the base 1 from above.
The upper mold 2 is fixed on the base 1 by appropriate removable fixing means (not shown), and the upper mold 2 is fixed with sufficient fixing support force to resist internal pressure. Ru.

The airtight bag 3 containing the liquid 10 can be configured so that the size of the airtight bag 3, the amount of the liquid 10, etc. can be selected in accordance with the size of the pressurized material a, the material of the laminated material, processing performance, etc. In order to make it possible to select the type of liquid 10 itself, the mixture of multiple types of liquids, the mixing ratio, etc., a wide variety of airtight bags 3 are prepared.

Further, as the heating mechanism 5 for the liquid 10, various mechanisms such as a heater 5a and a seat heater 5b built into the seat of the airtight bag 3 as shown in FIG. 3 can be used. As shown in FIG. 3, a heat insulating material 6 is used to increase thermal efficiency, and as shown in FIG. Cover and secure with vacuum pressure to improve molding precision.

The liquid 10 is heated by the heating mechanism 5 and evaporated as shown in FIG. 2 or 3 to expand the airtight bag 3, and the interior formed by the base 1 and the upper mold 2 is uniformly heated with vapor pressure. The vapor pressure is controlled by a heating mechanism 5 to expel gas pockets, excess resin, etc. from the pressurized molding material a, densify it, and harden it while keeping it pressurized.

(Effects of the Invention) As described above, the present invention comprises a base 1 on which a pressurized material a is placed, an upper die 2 fixed on the base 1 and covering the pressurized material a, and a base. Since it is equipped with an airtight bag 3 containing liquid 10 placed in the space formed by the table 1 and the upper mold 2, and a heating mechanism 5 for the liquid 10, the device can be greatly simplified in structure and made compact. Pressure molding can be carried out easily and easily by controlling the type of liquid in the bag, the mixing ratio, etc., and controlling the heating of the liquid. The heating and pressurization of materials can be easily and accurately controlled, and processing costs are significantly reduced by eliminating the consumption of nitrogen gas, reducing power consumption, etc., and significantly improving processing accuracy and reliability. This has the effect of significantly improving accuracy and processing efficiency.

Although the present invention has been described above with reference to embodiments, it goes without saying that the present invention is not limited to such embodiments, and that various design modifications can be made without departing from the spirit of the present invention. .

[Brief explanation of the drawing]

FIGS. 1A and 1B are an overall vertical cross-sectional view showing one embodiment of the present invention, a perspective view of an airtight bag containing liquid, and FIGS.
The figure is a longitudinal sectional view showing one aspect of the pressure press, FIG. 3 is a longitudinal sectional view showing another aspect of the pressure press, and FIG. 4 is a longitudinal sectional view of the press-formed material on the base. Figure 5A
is an external side view showing the conventional example, and Fig. 5B is Fig. 5A.
FIG. 1...Base, 2...Upper mold, 3...Airtight bag,
10...Liquid, a...Pressure molded material.

Claims (1)

[Claims] 1. A base on which the pressurized material is placed, an upper mold fixed on the base and covering the pressurized material, and a space formed by the base and the upper mold. A pressurizing press apparatus comprising: an airtight bag containing a liquid to be placed; and a heating mechanism for the liquid.