JPH0540976Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) The present invention relates to an apparatus for molding a plate-shaped object such as a laminate by continuously heating and pressurizing it for a certain period of time.

(Prior art) Conventionally, when manufacturing a laminate by stacking a plurality of prepregs and heating and pressing them, a single-stage or multi-stage press heating plate having dimensions greater than the thickness or area of the workpiece is used. A method is used in which one or multiple sets of workpieces are sandwiched between the two, pressurized by mechanical pressure means or hydraulic pressure, and heated for a certain period of time while maintaining a certain pressure to form the material. .

However, since such a molding method is a batch method with intermittent operation for each press molding, it is not possible to perform the molding process efficiently and continuously.

Furthermore, as a conventional method for forming a plate-shaped body such as a laminate, a method using a continuous heating and pressurizing apparatus as shown below has also been carried out.

In other words, as shown in Fig. 2, a pair of upper and lower endless steel belts with mirror-finished surfaces run in the same direction and at the same speed as the plate-shaped workpiece 1 that runs continuously in the horizontal direction. 2, and heated and pressurized part 3 through this steel belt 2.
The structure is such that the material is heated and pressurized in the cooling and pressurizing section 4, and then cooled and molded in the cooling and pressurizing section 4.

Oil is used as a heating and pressurizing medium and a cooling and pressurizing medium. Thermal oil heated and pressurized to a constant temperature and pressure by the heating and pressing mechanism is heated and pressurized to a chamber (room) that envelops the traveling path of the workpiece 1 and the steel belt 2 in the heating and pressing section 3. 5, and the workpiece 1 is inserted through the steel belt 2.
After applying stable thermal energy perpendicular to the thickness direction for a certain period of time, it is configured to flow back to the heating and pressing mechanism.

In addition, the cooling pressurizing section 4 is exactly the same as the heating and pressurizing section 3 described above, except that instead of circulating heated and pressurized thermal oil, cooled and pressurized thermal oil is circulated. It is composed of

Note that these heating pressurizing section 3 and cooling pressurizing section 4
In this case, the steel belt 2 of the chamber 5 and the running end and running end of the workpiece 1 are each sealed liquid-tightly from the inside by a sealing material 6.

(Problem to be solved by the invention) However, in such conventional devices, the thickness of the workpiece 1 is constant or
When the steel belt 2 changes continuously in units of mm, the steel belt 2 can follow this change and expand and contract somewhat, but if the type or size of the workpiece 1 is changed significantly or the workpiece 1 If there are discontinuities (such as material shortages), the steel belt 2 will not be able to follow the intermittent changes in thickness, and the sealing of the heat transfer oil by the steel belt 2 will break, causing oil leakage. It was inevitable that it would occur.

Once an oil leak occurs in this way, the pressurizing pressure of the heat transfer oil decreases and it takes a considerable amount of time for the pressure to reach an appropriate level again, which is why various molded products require precise pressure control. A problem had occurred.

In addition, workpieces and products were often contaminated by leaked oil.

This invention was developed to solve these problems, and the heat transfer oil is completely sealed, so that even if there is an interruption in the thickness of the workpiece, there will be no oil leakage or the accompanying pressure drop phenomenon. It is an object of the present invention to provide a continuous heating and press molding device that does not cause the above-mentioned problems.

[Structure of the invention] (Means for solving the problem) The continuous heating and pressure forming apparatus for plate-shaped bodies of the present invention contacts the upper and lower surfaces of a plate-shaped workpiece that runs continuously in the horizontal direction. an endless metal belt that is arranged opposite to the workpiece and runs at the same speed in the same direction as the workpiece; a chamber that liquid-tightly encloses the travel path of the workpiece and the metal belt; In the continuous heating and pressing apparatus for forming a plate-shaped body, the apparatus includes a mechanism for circulating a heating and pressing medium, and a pair of heat-resistant elastic bodies is provided on the outer surface of the metal belt inside the chamber along the length direction. It is characterized in that sheets are arranged and protective screens are inserted between these sheets and the metal belt.

In the present invention, a thin metal sheet or a sheet made of a composite material such as plastic laminated metal is used as the pair of heat-resistant elastic sheets arranged vertically on the outer surface of the metal belt, and These sheets are arranged inside the chamber so as to follow the outer surface of the metal belt and cover the upper and lower portions of the chamber in a liquid-tight manner.

Further, as the protective screen 18 inserted between such a sheet and the metal belt, it is desirable to use a stainless steel net-like body made of ultra-fine mesh.

(Function) In the continuous heating and pressure forming apparatus for plate-shaped bodies of the present invention, a heat-resistant elastic sheet arranged vertically on the outer surface of the metal belt inside the chamber,
The thermal energy and pressure of the heat transfer oil is efficiently transmitted to the workpiece through the metal belt, and the leakage of the heat transfer oil is prevented by expanding and contracting according to changes in the thickness of the workpiece. It has the function of preventing pressure and maintaining pressure. However, this sheet alone cannot sufficiently withstand the pressure applied by the heat transfer oil, and the pressure-resistant function is mainly carried out by the metal belt.

In addition, the protective screen inserted between the heat-resistant elastic sheet and the metal belt has the function of preventing wear of the elastic sheet due to contact with the metal belt, and also has the function of preventing the wear of the elastic sheet due to contact with the metal belt. It can follow changes in elasticity, and it works to reinforce the strength of the elastic sheet.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

FIG. 1 is a diagram schematically showing an embodiment of the continuous heating and press molding apparatus of the present invention.

In the figure, reference numeral 7 indicates a workpiece that runs continuously in the horizontal direction, and a pair of endless steel belts 8 are disposed facing each other so as to contact the upper and lower surfaces of the workpiece 7, respectively. These steel belts 8 are running in the same direction and at the same speed as the workpiece 7, respectively.

These workpieces 7 and steel belts 8
Both run through the center of the chamber 9 in the horizontal direction, and their running ends and running ends of the chamber 9 are each liquid-tightly sealed by a sealing material 10. ing.

Further, within such a chamber 9, a heating medium oil 11 is continuously circulated by a heating and pressurizing mechanism. The heating and pressurizing mechanism includes a heating section 13 that heats the heat medium oil 11 stored in the heat medium oil tank 12, a pressure pump 14, and a flow rate control valve 15, and is configured to heat the heat medium supplied into the chamber 9. The oil 11 is configured to return to the heat transfer oil tank 12 again and be heated and pressurized.

Further, inside the chamber 9, a sheet-shaped inner chamber seal 16 made of a heat-resistant elastic material is arranged so as to follow the outer surface of the running steel belt 8. This chamber inner seal 1
The ends of the chambers 6 are respectively sandwiched between the flange portions of the chamber 9 from the inside and fixed with flange bolts 17 through packing.

Furthermore, a protective screen 18 made of stainless steel mesh is inserted between the chamber inner seal 16 and the running steel belt 8.

In the continuous heating and pressing apparatus configured with the heating and pressing section as described above, the heating oil 11 stored in the heating oil tank 12 is heated to a predetermined temperature while passing through the heating section 13, and then heated to a predetermined temperature. After being pressurized to a predetermined pressure by the pressure pump 14, the flow control valve 1
5 into the chamber 9. The workpiece 7, which is continuously running, receives the heat and pressure of the heat transfer oil 11 press-fitted into the chamber 9 via the steel belt 8 during the time it runs inside the chamber 9, and is integrally laminated. be done. Here, an inner chamber seal 16 made of a heat-resistant elastic material is disposed outside the steel belt 8, and this seal 16 is attached to the workpiece 7.
By expanding and contracting while following changes in the thickness of the steel belt 8, the outer surface of the steel belt 8 is liquid-tightly covered. 7 is efficiently transmitted.

Furthermore, since a protective screen 18 made of stainless steel is inserted between the inner chamber seal 16 and the steel belt 8, the inner chamber seal 16 is reinforced by this. Further, since the inner chamber seal 16 is prevented from being worn out due to contact friction with the steel belt 8, it can be used for a long period of time.

In the above embodiments, only the heating and pressing part of the heating and pressing apparatus was explained, but the cooling and pressing part configured by circulating cooled and pressurized heat transfer oil in the chamber can be It can also be configured to be provided behind the heating and pressurizing section along the travel path of the workpiece.

[Effects of the invention] As explained above, according to the continuous heating and pressing apparatus for plate-shaped bodies of the invention, even if the thickness of the workpiece changes, oil, which is the heating and pressing medium, will not leak. never occurs.

Therefore, a high-quality laminate molded product can be efficiently manufactured without causing a temporary decrease in pressing force or contamination of the product.

[Brief explanation of the drawing]

FIG. 1 is a sectional view schematically showing an embodiment of the continuous heating and pressing apparatus of the present invention, and FIG. 2 is an explanatory diagram showing the schematic configuration of a conventional continuous heating and pressing apparatus. 7...Workpiece, 8...Steel belt, 9...
...Chamber, 11... Heat transfer oil, 16... Seal inside the chamber, 18... Protective screen.

Claims (1)

[Scope of utility model registration request] a pair of endless metal belts that are arranged opposite to each other in contact with the upper and lower surfaces of a plate-shaped workpiece that runs continuously in a horizontal direction, and that run in the same direction and at the same speed as the workpiece; In a continuous heating and pressing apparatus for forming a plate-shaped body, the apparatus includes a chamber that liquid-tightly encloses an object and a running path of the metal belt, and a mechanism that circulates a liquid heating and pressing medium within the chamber. A pair of heat-resistant elastic sheets are disposed along the length on the outer surface of the internal metal belt, and a protective screen is inserted between each of these sheets and the metal belt. A continuous heating and pressure forming device for plate-shaped bodies, which is characterized by: