JPS6319210A - Heat-pressurizing method - Google Patents

Abstract

PURPOSE:To improve the limit to the size of a plate press molded article and to obtain a long sheet-like laminated molding, by allowing a material to be heat-pressurized to move through a pressure container having a pressurizing mechanism applying pressure to a pressure medium from the inlet thereof to the outlet thereof to heat-pressurize the same in the pressure medium within the pressure container. CONSTITUTION:A laminated molding material 101 is molded under heating and pressure by the pressure medium 104 in a pressure container 103. Heating is performed by injecting the preheated pressure medium 104 in the pressure container 103 of a main body from an injection port 107 and heating said container 103 by a heat exchanger 108, and pressure is applied to the whole of the pressure medium 104 by a hydraulic pump 109. The pressure during molding is removed by operating a relief valve 110. By this method, since pressure and heating are uniformly applied to a material to be heated and pressurized and side pressure is also applied thereto, the material to be heated and pressurized can be sufficiently molded up to the end parts thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a heating and pressing method used in the continuous production of laminated plates widely used as electrical insulating materials and the like.

(Prior art) Conventionally, laminates such as synthetic resin laminates are produced by stacking a required number of substrates impregnated with thermosetting resin, heating them to melt the resin into a fluid state, and rolling it into a sea urchin as shown in Figure 1. Alternatively, as shown in FIG. 2, the substrates are manufactured by laminating the substrates in contact with each other in a multi-stage flat plate press.

In FIG. 2, 1 is a sheet-like material such as a stainless steel plate, aluminum foil, or plastic film, and 2 is a prepreg.

Prepreg is a sheet-like base material made of natural and synthetic organic and inorganic fibers such as paper, glass fiber cloth, glass fiber nonwoven fabric, asbestos cloth, polyester fiber cloth, etc. It is manufactured by impregnating a face of synthetic resin such as resin, polyimide resin, silicone resin, etc. with a liquid-like synthetic side fat, heating and drying it, and making it into synthetic resin iB-5tage. 3 is m pressure, a heating roll, pressurizes the prepreg 2, heats it with the heating roll, pressurizes the molded column on the n laminate, 7 is a movable plate, 8 is a fixed part, 9 is a cylinder, 10 is an oil Chamber, 11 is a hydraulic inlet, 12&X pressure outlet.

The upper plate 5 is supported and fixed to a fixed part 8 by a column 6, and the movable plate 7 is supported by the column so as to be movable up and down. , is pushed upward with the movement of the cylinder 9.

A plurality of heating plates 4 are arranged between an upper plate 5 and a movable plate 7, and a suitable white stopper (not shown) is used to maintain a necessary distance for the laminated molding material to be carried between the gold heating plates and to move the metal upward. are installed in a movable state (the heating plates 4 at the uppermost and lower ends are attached to the upper plate 5 and the movable plate 7, respectively).

Prepreg, which is a laminated molding material, is cut into a predetermined size.The required number of sheets are sandwiched between mirror plates, several to several dozen sets of this configuration are piled up, and then transported between heating plates (Fig. (not shown).

According to the upward movement of the movable plate 7, the hot platen 4 is also pushed upward, and the prepreg is compressed between the fixed upper plate 5 and the movable plate 7, and at the same time the heat required for compression molding is released. teeth,
K steam is supplied through a pipe (not shown) embedded inside the hot platen 4.

(Problem to be Solved by the Invention When manufactured using a no-roll method, the molding material can be molded into long pieces, allowing continuous manufacturing, but it is not possible to shape the bottom by heating and pressurizing it. It can only be applied to synthetic resins that require a short time to press.Most synthetic resins require heating and pressing for several minutes even for a short period of time, so currently most synthetic resins use flat plate presses and roll presses. is only used in cases such as simple bonding.

However, the multi-stage flat plate press can only form sheets of a size limited to the size of the pressure plate of the press.

Therefore, productivity is low.

The present invention improves the limitations on the size of the molded product of a flat plate press, and provides a heating and pressing method that can be used in the production of laminates, etc., and can produce long sheet-like laminate molded products. be.

(Means for solving the problem) The present invention impregnates a synthetic resin face such as phenol resin, epoxy resin, polyester resin, polyimide resin, silicone! A resin into a base material such as paper or glass cloth, and then dries it. A long prepreg made of a metal plate, foil, film, etc. is directly adhered to a liquid pressure medium, heated and pressurized, and molded at °C. The seal is configured so that the temperature of the liquid pressurized medium near the opening is below the temperature inside the pressure vessel, and the amount of leakage of the entire pressurized medium from the opening is minimized. The prepreg is then heated and pressed to form a laminate.

The explanation will be given below based on FIG.

101 is a laminated molding material such as prepreg in the required number of 3 to 10 sheets, 102 is a sheet-like material such as a stainless steel mirror plate, a steel plate, a gold leaf such as aluminum foil, a plastic film, etc., containing the laminated molding material, It is a pair of endless belts. Reference numeral 103 denotes a pressure vessel serving as the main body of the molding machine, and a liquid pressurized medium 104 is stored inside.

105 and 106 are openings of this molding machine, 105 is an inlet, and 106 is an outlet. The laminated molding material 101 enters through the mill entrance 105 and exits through the exit 106. It is desirable that the dimensions of the openings of the inlet 105 and the outlet 106 be as narrow as possible within the range of the cross-sectional dimensions of the molding material 101 and without interfering with passage. The length of the opening is the pressurized medium 104
The length may vary depending on the seed field, but the length may be as long as necessary to minimize leakage of the pressurized medium.

The laminated molding material 101 is a pressurized medium 1 in a pressure vessel 103.
04 to heat and pressurize the bottom shape.

The temperature and pressure can be set to the conditions that are suitable for molding the target compound and resin.For heating, a preheated pressurized medium is injected through the injection port 107 and transferred to the pressure vessel 103 of the main body using the heat exchanger 108. This is done by heating. Pressurization is performed by a hydraulic pump 109 and applied to the entire pressurized medium 104. +7 +7-7 when you want to remove pressure during molding
This is done by manipulating the valve 110.

The material of the pressurizing medium 104 is an alloy such as lead, paraffin,
The material used is a material that becomes a liquid flowable material in a temperature range suitable for molding the desired synthetic resin such as glass or thermoplastic synthetic resin, and solidifies at a temperature lower than this temperature. Although these materials rarely come into direct contact with synthetic resins, it is necessary to select materials that do not dissolve or permeate synthetic resins. Inlet 105 and outlet 106 which are openings
The pressure medium 104 is arranged in such a way that there is minimal leakage in the vicinity.
The gap with the sheet material is made as narrow as possible. For example, it is preferable to have a clearance of ks Q and ISC of 15 mto.

In addition, the temperature of the pressure medium near the opening becomes lower than the temperature inside the pressure vessel.

The laminated molding material sandwiched between sheet-like materials such as stainless steel plates moves while being in contact with the pressure medium.

Many pressure media have lubricity (which allows for smooth movement).

Note that the pressure medium is discharged from the pressurizing pump in an amount slightly larger than the amount of pressure medium leaking from the inlet and outlet of the pressure vessel.

Laminated molding materials that are heated and pressed materials include prepreg and SMC (Sheet Molding C).
cmpound), metal plates, sheet-like wood materials, green sheets, multilayer wiring board structures, collected materials, etc. may also be used. The constituent material of a multilayer wiring board is to stack one or more inner-layer circuit boards on which the necessary circuit pattern is formed on one or both sides of an insulating board using prepreg, and then layer the inner layer circuit board on one or both sides through the prepreg. The circuit board, single-sided steel foil clad laminate, and @i\i are stacked together in one piece.

The single-sided circuit board and single-sided steel foil clad laminate placed in the outer layer are arranged so that the circuit-formed side and the copper foil side are on the outside.

The shape of the laminated molding material may be long or cut into a certain size.

Alternatively, it may be in the form of granules or powder.

In addition, when forming a laminate by heating and pressing a liquid synthetic resin containing a solvent-free or reactive diluent and a base material such as glass cloth, the heating and pressing method of the present invention can be applied to When manufacturing prepreg by heating and pressing the base material,
Synthetic resin and chipped strand mat are heated and pressurized.
When manufacturing MC sheets, they are used in a wide range of fields, including heating and pressing a plastic base material containing a foaming agent to obtain a foam.

Conditions for heating and pressing are appropriately selected depending on the material to be heated and pressed and the intended product.

Example 1゜Paper base phenolic resin impregnated prepreg (α25mco thickness, resin 45, kraft paper 55 parts, kraft paper weighs 13 m.m.)
5 g/mash) were sandwiched between 1.2-thick stainless steel belts and heated and pressurized using the apparatus shown in Figure 1 using industrial normal paraffin having 28 to 30 carbon atoms as the pressurizing medium.
A laminate was obtained. The temperature of the opening was maintained at 150 to 170°C, the opening length was 50 CI++, and the gap with the stainless steel belt was Q, 3 m+n. The temperature of the pressurized medium was 170° C. at the center, and the pressure was 60 kg/−.

The pressurization time was 25 minutes. The thickness of the obtained laminate was 1.
55111rl+, a plate-shaped molded product with no change in shape even when heated at 150° C. for 2 hours was obtained. The movement of each laminate was 1 m per portion, and the length of the main body was 25 m.

Example 2 130 g/[ln! Unsaturated polyester resin for painting (manufactured by Hitachi Chemical, part name: PS-51) made by adding a peroxide curing agent to linter paper (solid content equivalent: 130 g/r)
n' coated paper and stacked 8 sheets of coated paper to a thickness of 1.2
A laminate was obtained by heating and pressurizing the mixture between stainless steel plates of mm in diameter using the apparatus shown in Fig. 5. The conditions of the opening were the same as in the example, the pressurized medium was heated to 150°C and injected, and the temperature at the center was 150°C.
℃, and the temperature of the opening is 130 to 150℃. The pressure was 10 kg/an' and the pressurizing time was 5 minutes. The thus obtained laminate did not change its appearance significantly even after being heated at 130° C. for 2 hours, the moving speed of the ako laminate was 1 m per minute, and the length of the main body was 5 m.

(Effect of the invention) The effects of the present invention are as follows.

(1) In order to move the heated and pressurized material while performing high-temperature and high-pressure forming, a large force is required to overcome frictional resistance. The energy required for movement is l''.

(2) The pressure and temperature of the heated and pressurized material are uniform.

(3) Since lateral pressure is also applied, it is possible to sufficiently form the heated and pressurized material to the edges (uniform plate thickness, uniform physical properties).

(4) Equipment becomes cheaper. The installation space is also reduced.

(5) Pressurization and depressurization can be easily performed.

(6) Pressurization energy can be reduced.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing the method of the invention, and FIGS. 2 and 3 are sectional views showing the conventional method. Explanation of symbols 101 Laminated molding material 105 Pressure vessel 104 Pressure medium 105 Population 106 Outlet'<-

Claims (1)

[Claims] 1. The material to be heated and pressurized is placed under pressure from the inlet to the outlet of a pressure vessel which contains a liquid pressure medium inside and has an inlet and an outlet of the material to be heated and pressurized, as well as a pressurizing mechanism that applies pressure to the pressure medium. A heating and pressurizing method characterized by moving the inside of a container and heating and pressurizing it in a pressure medium inside a pressure vessel.