JPH0262369B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Field of Application] This invention is directed to reinforcing materials such as paper, cloth, glass fiber, etc. impregnated with liquid thermosetting resin, or thermoplastic resin laminated with sheets, films, etc. The present invention relates to a continuous pressing method suitable for compression molding and foam processing of foams such as polystyrene and polyurethane. [Prior Art] As this type of continuous pressurization method, the present applicant previously proposed Japanese Patent Application No. 1983-56424. A fixed pressure chamber is provided on each back side (the side that does not come into contact with the object to be compressed) of a pair of conveyor belts that sandwich and convey the object to be compressed, and a pressurizing fluid is supplied to this pressure chamber. , a sealing fluid is supplied and filled between the peripheral edge of the fixed pressurizing chamber and the conveyor belt to confine the pressurizing fluid in the fixed pressurizing chamber, and the pressurizing fluid pressurizes the object to be compressed. It is. According to this proposal, a gap is formed between the periphery of the pressurizing chamber and the conveyor belt by the sealing fluid,
Since the conveyor belt is transferred without contacting the fixed pressurizing chamber, excessive frictional force is not applied to the conveyor belt or the pressurizing chamber. Therefore, the conveyor belt can maintain a good polished surface for a long time, and extremely excellent pressure processing is possible. [Problems to be Solved by the Invention] By the way, in the conventional continuous pressurization method described above, since the temperature of the pressurization chamber was uniform, processing such as heating and cooling performed continuously was difficult. I couldn't do it. The present invention was made against this background, and an object of the present invention is to provide a continuous pressurization method that can perform heating and cooling continuously. [Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides at least one pair of pressurizing chambers whose openings face each other, and at least one pair of conveyance chambers which circulate between the openings. The object to be compressed, which is conveyed while being sandwiched between the pair of conveyor belts, is continuously pressurized via the conveyor belt by a pressurizing fluid supplied to the pressurizing chamber. In the continuous pressurization method, the pressurization chamber is divided into a plurality of chambers, and these chambers are assigned to a heating chamber and a cooling chamber, and water is supplied to the cooling chamber as a pressurizing fluid. The gist of the present invention is to supply an anti-emulsion oil as a pressurizing fluid to the heating chamber, form a sealing portion around the pressurizing chamber, and supply the sealing fluid to the sealing portion. [Function] According to the above configuration, heating processing and cooling processing can be performed continuously. Moreover, water as a pressurizing fluid has a large heat transfer ability and can obtain a good cooling effect. Furthermore, since anti-emulsion oil is used as the pressurizing fluid for heating, it can be easily separated even if mixed with water, which is the pressurizing fluid for cooling. Furthermore, by supplying the sealing fluid to the sealing portion, smooth movement of the conveyor belt is possible and leakage of the pressurizing fluid is minimized. [Example] Hereinafter, an example of the present invention will be described with reference to the drawings. Figures 1 and 2 are diagrams showing the configuration of an embodiment of the present invention, with Figure 1 being a side sectional view showing the overall configuration, and Figure 2 being an enlarged sectional view showing the configuration of the press section. . In the figure, 1a, 1a and 1b, 1b are
They are drums that are placed vertically apart from each other by a certain distance. Endless steel belts (conveyor belts) 2, 2 are tensioned around the two sets of drums 1a, 1b, and are driven to rotate vertically at a constant speed. The object 3 to be compressed is sandwiched between these endless steel belts 2, 2 and conveyed. On the back side of each endless steel belt 2, that is, on the side that does not come into contact with the object 3 to be compressed, the openings of the fixed pressurizing chambers 4, 4 face each other. Fixed pressurization chamber 4
1 is a pressurizing chamber having a rectangular horizontal cross section, and is divided into two pressurizing chambers 4a and 4b, respectively. Further, a pressurizing fluid 6a for heating is circulated and supplied to the pressurizing chamber 4a, and a pressurizing fluid 6b for cooling is circulated and supplied to the pressurizing chamber 4b.
is being circulated and supplied. These pressurizing fluids 6 (6a, 6b) supplied from the outside pressurize the compressed object 3 via the endless steel belt 2 with uniform surface pressure. Here, water is used as the pressurizing fluid 6b for cooling, and as the pressurizing fluid 6a for heating,
It is advantageous to use an anti-emulsion oil that is easily separated from the cooling water. These reasons will be discussed later. Peripheral portion 8a of housing 8 forming pressurizing chamber 4
A seal portion 5 is formed between and the endless steel belt 2. That is, the sealing fluid 7 pushed out from the peripheral edge part 8a fills the sealing part 5, preventing the pressurized fluids 6a and 6b from flowing out to the outside, and creating a space between the endless steel belt 2 and the peripheral edge part 8a. During the sealing fluid 7
form. Therefore, the endless steel belt 2 is transported without contacting the peripheral edge 8a.
Note that although the seal portion 5 is drawn large in the drawing for convenience of explanation, it is actually approximately 0.1 μm to 0.1 mm. In such a configuration, the object 3 to be compressed is held between the endless steel belts 2 and is pressurized while being conveyed to the right in FIG. That is, the pressurizing fluids 6a, 6b injected into the pressurizing chambers 4a, 4b flow through the flow paths shown in FIG.
4b, the endless steel belt 2 is pressurized with a uniform surface pressure, and this force presses the compressed object 3 with a uniform surface pressure. Furthermore, the object to be compressed 3 is heated or cooled due to the temperature difference between the pressurizing fluids 6a, 6b and the endless steel belt 2. That is, the object 3 to be compressed is heated when passing between the pressurizing chambers 4a, and the object 3 to be compressed is cooled when passing through the pressurizing chamber 4b.
As a result, when laminating, for example, the material is heated and fused in the pressurizing chamber 4a, and then

[Table] As can be seen from this table and equation (1), the same oil is used for the pressurized fluid 6a for heating and the pressurized fluid 6b for cooling, and the former is heated to 200°C and the latter to 40°C. Then, the heat transfer coefficient on the cooling side drops to about 1/2 of the heat transfer coefficient on the heating side, resulting in a decrease in cooling capacity. On the other hand, when water is used as the cooling pressurized fluid 6b, the thermal conductivity k
is 5 times higher and the kinematic viscosity μ is 1/200, so the heat transfer coefficient h increases approximately 7 times. In other words, the heat transfer capacity is approximately 7
increase twice. Therefore, high cooling capacity can be obtained. In this case, the pressurized fluid 6a for heating and the pressurized fluid 6b for cooling are mixed to some extent through the partition walls of the two pressurizing chambers 4a and 4b, so it is necessary to collect and separate them. It is desirable to use oils with anti-emulsion properties. Although the endless steel belt 2 is used in this embodiment, a sheet-like belt made of a material such as plastic may be used instead. [Effects of the Invention] As explained above, according to the present invention, heating processing and cooling processing can be performed continuously.
In addition, high cooling capacity can be obtained, and the pressurized fluid for heating can be easily separated and recovered. Furthermore, leakage of the pressurizing fluid is suppressed, allowing smooth movement of the conveyor belt.

[Brief explanation of the drawing]

Figures 1 and 2 are diagrams showing the configuration of an embodiment of the present invention, and Figure 1 is a side sectional view showing the overall configuration;
FIG. 2 is an enlarged sectional view showing the configuration of the pressurizing section. 1a, 1b...Drum, 2...Endless steel belt (conveyor belt), 3...Object to be compressed, 4
...Fixed pressurization chamber, 4a...Heating pressurization chamber, 4b...
... Pressurized chamber for cooling, 5... Seal portion, 6... Fluid for pressurization, 6a... Pressurized fluid for heating, 6b... Pressurized fluid for cooling, 7... Fluid for sealing, 8a...
...periphery.

Claims (1)

[Scope of Claims] 1. At least one pair of pressurizing chambers whose openings face each other, and at least one pair of conveyor belts that circulate between the openings, and between the pair of conveyor belts. In a continuous pressurizing method, in which an object to be compressed that is sandwiched and conveyed is continuously pressurized via the conveyor belt by a pressurizing fluid supplied to the pressurizing chamber, the pressurizing chamber is Divided into a plurality of chambers, these chambers are assigned to a heating chamber and a cooling chamber, and the cooling chamber is filled with water as a pressurizing fluid, and the heating chamber is filled with anti-emulsion water as a pressurizing fluid. A method for continuous pressurization, characterized in that oil is supplied, a seal is formed around the pressurizing chamber, and a sealing fluid is supplied to the seal.