JPS63290712A - Continuous pressurizing device - Google Patents

Abstract

PURPOSE:To run conveyor belts perfectly synchronously, reduce the cost of a device and make the same compact by mounting a driving unit on a rotating drum of only either side of a couple of conveyor belts. CONSTITUTION:When a lower rotating drum 1b is rorated by a driving unit 9, a conveyor belt 2b is started to run together. Said conveyor belt 2b, however, is in contact with a conveyor belt 2a in pressurizing chambers 4a and 4b through a subject 3 to be compressed, and the conveyor belt 2a is started to run, too. In that case, the driving source is only one and the conveyor belt 2a being in the free state on one side is driven by the conveyor belt 2b being in contact through the subject 3 to be compressed, and the conveyor belts 2a and 2b run perfectly synchronously. It is, therefore, not necessary to have a fine adjustment function to make the device expensive in the driving unit 9.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention is applicable to reinforcing materials such as paper, cloth, glass fiber, etc. impregnated with liquid thermosetting resin, or thermoplastic resin sheets or films. This invention relates to a continuous pressurizing device suitable for use in compression molding a laminated product.

[Prior Art] The present applicant previously proposed Japanese Patent Application No. 1983-56424 as a continuous pressurizing device of this type. In this method, a fixed pressurizing chamber is provided on each back side (the side that does not come into contact with the compressed object) of a pair of conveyor belts that sandwich and convey the compressed object, and the pressurizing fluid is evenly distributed in each of these pressurizing chambers. At the same time, a sealing fluid is supplied and filled between the peripheral edge of each fixed pressurizing chamber and each conveyor belt to confine each pressurizing fluid in each fixed pressurizing chamber, and these pressurizing fluids are The object to be compressed is pressurized by the compressor.

According to this proposal, a gap is formed by the sealing fluid between the peripheral edge of each pressurizing chamber and each conveyor belt, and each conveyor belt is transferred without contacting its respective fixed pressurizing chamber. Excessive frictional force is not applied to the conveyor belt or each pressurizing chamber. Therefore, the conveyor belt can maintain a good polished surface for a long period of time, and extremely excellent pressure processing is possible.

[Problems to be Solved by the Invention] By the way, in order to further improve the performance of the continuous pressurizing device, it has been found that the following points need to be improved.

That is, since each conveyor belt in the continuous pressure device is driven by a separate drive device,
It is difficult to completely synchronize each of them, and a drive device that can be highly finely adjusted is required just to synchronize them to a level that does not interfere with operation, which is an obstacle to lowering the cost of the device.

This invention was made in view of these circumstances,
It is an object of the present invention to provide a continuous pressurizing device that can completely synchronize the running of each conveyor belt and can also reduce the cost and size of the device.

[Means for Solving the Problems] The inventor of the present invention has conducted extensive research to solve the above-mentioned problems, and has suggested the following unexpected, quite simple, and effective solution mechanism. I have come to the conclusion that this is the case.

In other words, when the drive device of the conveyor belt was attached only to the rotating drum of one conveyor belt, and the drive device was not installed on the other conveyor belt, and the drive device was operated in a free state, the running of each conveyor belt was not hindered in any way. Instead, it has been found that the free conveyor belt runs completely synchronously with the driven conveyor belt.

The present invention has been made based on this knowledge. That is, the present invention includes at least a pair of pressurizing chambers whose openings face each other, and at least a pair of conveyor belts that circulate between the opposed openings, and wherein the pair of conveyor belts In the continuous pressurizing device, the object to be compressed, which is conveyed while being sandwiched between the two, is continuously pressurized via the conveyor belt by pressurizing fluid supplied to each of the pressurizing chambers, respectively. The present invention is characterized in that a drive device is attached only to the rotating drum of one of the conveyor belts.

[Function] According to the above configuration, since only one drive device is required for a pair of conveyor belts, the running of each conveyor belt can be completely synchronized.Furthermore, since only one drive device is required, fine adjustment functions are provided. It becomes possible to sufficiently use a drive device without the present invention, and the initial cost of the device can be reduced, and at the same time, the device can be made smaller.

[Example code] Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a side sectional view showing the overall configuration of a continuous pressurizing device according to an embodiment of the present invention.

In the figure, 1 a, 1 a and 1 b, 1 b
are drums arranged vertically with a fixed gap between them. Endless steel belts (conveyor belts) 2a, 2 are attached to the two sets of drums 1a, 1b.
b is hung in a tense state and can be rotated freely.

And these endless steel belts 2a.

The object 3 to be compressed is sandwiched between the rollers 2b and conveyed.

A fixed pressurizing chamber 4a, a
The openings of 4b are opposite to each other. Each fixed pressurization chamber 4a, 4
b is a pressurizing chamber with a rectangular horizontal cross section, and the endless steel belt 2as is
2b, the object 3 to be compressed is pressurized with uniform surface pressure. The pressurizing fluid 6 in each of the pressurizing chambers 4a, 4b flows out through fluid outflow pipes 7a, 7b whose flow rate is reduced from that of the fluid supply pipes 5a, 5b.

A sealing fluid is supplied to the groove-shaped peripheral edge part 8a of the housing 8 constituting each pressurizing chamber 4aq 4b.
1 μm to 0.1 μm), it is in close contact with each of the endless steel belts 2a and 2b.

The endless rotor belts 2a, 2b are moved only by a drive device 9 connected to one of the lower drums 1b. Although this drive device 9 can select the required rotation speed, it is an inexpensive device that does not have a fine adjustment function like the conventional one. The feature of the present invention is that the upper and lower endless steel belts 2a, 2b are driven by only one drive device 9 in this way.

In the above configuration, when the lower rotary drum lb is rotated by the drive device 9, the conveyor belt 2b runs accordingly, and this conveyor belt 2b is moved by the pressurizing chambers 4a, 4b through the compressed object 3. Since the conveyor belt 2a is pressed against the conveyor belt 2a, the conveyor belt 2a also runs at the same time. In this case, there is only one driving source, and one conveyor belt 2a in a free state is in contact with the conveyor belt 2a in a press-contact state via the compressed object 3.
Since the transport belt 2a and the transport belt 2b are driven by the transport belt 2b, the transport belt 2a and the transport belt 2b run in complete synchronization. Therefore, the drive device 9 does not require the fine adjustment function that increases the cost of the device as described above.

As described above, the object 3 to be compressed is held between the endless steel belts 2a and 2b, and is pressurized while being conveyed to the right in FIG. Each pressurizing chamber 4a.

The pressurizing fluid 6 injected into each pressurizing chamber 4a is injected into each pressurizing chamber 4a.

While circulating within the endless steel belt 2a
, 2b are pressurized with a uniform surface pressure, and this force presses the compressed object 3 with a uniform surface pressure.

Note that the pressurizing fluid 6 and the endless steel belt 2a,
The object 3 to be compressed can be heated or cooled by the temperature difference 2b. Further, in the peripheral portion 8a, a pressurizing chamber 4a,
The sealing fluid is injected at a pressure higher than the pressure of each pressurizing fluid 6 in the pressurizing fluid 4b, and as it flows out of the peripheral edge 8a, a stable thin film is formed in the gap between the peripheral edge 8a and the endless steel belts 2a, 2b. form.

This thin film layer allows the pressurizing fluid 6 to be transferred to the pressurizing chamber 4a.

4b, and prevents the peripheral portion 8a and the endless steel belts 2a, 2b from coming into contact with each other. Therefore, Endless Steel Bell) 2a,
The surface 2b passes between the openings of the pair of upper and lower pressurizing chambers 4a and 4b without friction with the peripheral edge 1'118a.

[Effects of the Invention] As explained above, the present invention includes at least one pair of pressurizing chambers whose openings face each other, and at least one pair of conveyor belts that circulate between the facing openings. death,
The object to be compressed, which is conveyed between the pair of conveyor belts, is continuously pressurized via the conveyor belts by the pressurizing fluid supplied to each of the pressurizing chambers. The pressurizing device is characterized in that a drive device is attached only to the rotating drum of one of the pair of conveyor belts.

Therefore, according to the continuous pressurizing device of the present invention, since only one drive device is required for a pair of conveyor belts, the running of each conveyor belt can be completely synchronized, and furthermore, since only one drive device is required, Even a drive device without an adjustment function can be used satisfactorily, the initial cost of the device can be reduced, and at the same time, the device can be made smaller.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view showing the overall structure of a continuous pressurizing device according to an embodiment of the present invention. l a, 1 b...Drum, 2a, 2b...
・・Endless steel belt (conveyor belt), 3・・
...Object to be compressed, 4a, 4b... Fixed pressurizing chamber, 5a, 5b... Fluid supply pipe, 6... Pressurizing fluid, ? a, 7b...Fluid outflow pipe, 8...Housing, 8a...Periphery of housing, 9...
Conveyor belt drive device.

Claims (1)

[Scope of Claims] At least one pair of pressurizing chambers whose openings face each other, and at least one pair of conveyor belts that circulate between the opposite openings, the pair of conveyor belts A continuous pressurizing device that continuously pressurizes an object to be compressed, which is sandwiched between the two and conveyed, via the conveyor belt by pressurizing fluid supplied to each of the pressurizing chambers. A continuous pressure device characterized in that a drive device is attached only to the rotating drum of one of the conveyor belts.