JPH03264196A - Continuous pressurizing apparatus - Google Patents

Abstract

PURPOSE:To execute continuous pressurize forming by introducing pressurizing fluid into pressurizing chambers in upper and lower pressurizing apparatuses and executing the pressurize forming while holding and conveying a material to be compressed between circulated conveying belts arranged in between the upper and lower pressurizing chambers. CONSTITUTION:The pressurizing fluid is introduced into the pressurizing chambers 1 in the upper and lower pressurizing apparatuses and the pressurize forming is executed while holding a conveying the material H to be compressed between the circulated conveying belts 2 arranged in between the upper and lower pressurizing chambers. Then, grooving parts 8 opened at the conveying belts at the circumference of the pressurizing chambers, are formed and the sliding members 9 are fitted as vertically slidable in the groove, and by arranging pushing means at the conveying belt sides and sealing members 16 outside the groove parts 8, leakage of the pressurizing fluid is prevented. By this method, the pressurize forming can be continuously executed to the material to be compressed under uniform pressure.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a continuous pressurizing device used for compression molding of resin.

``Conventional techniques produce resin compression molded products reinforced with paper, cloth, glass fibers, etc., boards made of overlapping resin film sheets, or wooden plywood plates made of resin adhesive. It is essential to perform compression processing such as compression molding or compression bonding.

Conventionally, compression molding or compression bonding was carried out by attaching the object to be compressed to the openings of the upper and lower templates, and applying pressure in batches using a press machine at room temperature or under heat. . However, such a batch system has limitations in terms of saving labor, improving productivity, and achieving uniform quality, so it has been desired to make the pressurizing process continuous.

Therefore, in view of this situation, the present applicant filed a patent application in 1986-
No. 198757 and other patent applications have been filed for a device capable of continuous pressure forming.

An example of the continuous pressurizing device according to this patent application is shown in FIGS. 5 to 7. The continuous pressurizing device of this example includes a pair of pressurizing devices A each having a pressurizing chamber l having an opening 1a, and the pressurizing devices A and A are arranged so that their openings Ia and 1a face each other. opening 1 of a pair of pressurizing devices A
The structure is such that two conveyor belts (steel belts) 2 are provided between a and la, each rotating at a constant speed. In FIG. 5, 3 indicates a drum around which the conveyor belt 2 is wound, 4 is a supply pipe for supplying pressurizing fluid to the pressurizing chamber l, and 5 is a pipe for supplying pressurizing fluid from the pressurizing chamber l. A discharge pipe for discharge is shown. Furthermore, the spacing between the pressurizing chambers 1.1 is set to a constant spacing by using a hydraulic cylinder or a connecting shaft, and this spacing is maintained.

Furthermore, a flange portion 7 is formed at the periphery of the opening 1a to each pressurizing device, and a groove portion 8 is formed on the end surface of these flange portions 7 facing the conveyor belt 2, as shown in FIG.
is formed, and a sliding member 9 is fitted into this groove 8 so as to be slidable up and down C0.

A pressurized space I is formed between the groove portion 8 and the sliding member 9 on the back side.
A sealing fluid is supplied to the pressurized space 10 through a supply hole 11 formed in the flange portion 7. Further, a recess 12 is formed on the surface of the sliding member 9 that contacts the conveyor belt 2, and this recess 12
is a hole 13 formed inside the sliding member 9 and having an L-shaped cross section.
The groove portion 8 is connected to a supply hole 14 opened on the side surface of the groove portion 8 through the groove portion 8, and lubricating fluid is supplied from the supply hole 14.

The continuous pressurizing device configured as described above moves the object H to be compressed between the conveyor belts 2 and 2 in the direction of the arrow in FIG. supply,
By supplying sealing fluid to the pressurized space lO on the back side of the groove 8 and press the sliding member 9 against the compressed object H, the pressurized chamber lO is closed.
A pressurizing fluid can be contained in the space formed between the conveyor belt 2 and the conveyor belt 2, and the pressurized object H can be held and press-molded by the upper and lower pressurized fluids.

Note that in order to reduce the friction between the conveyor belt 2 and the sliding member 9 to the level of fluid friction and reduce the driving force of the conveyor belts 2, 2, the gap between the conveyor belt 2 and the sliding member 9 is It is necessary to set it in the range of about 0.1 μm-1 mm.

For this reason, in the continuous pressurizing device having the above structure, a lubricating fluid is supplied between the sliding member 9 and the conveyor belt 2 from the supply hole 14.

``Problem to be Solved by the Invention'' However, in the continuous pressurizing device having the above configuration, since a slight gap is provided between the sliding member 9 and the conveyor belt 2 as described above, it is difficult to eliminate this gap. There was a problem that the pressurizing fluid leaked through the tube. For this reason, there was a problem in that the pressurizing fluid was likely to be lost.

In addition, in the continuous pressurizing device having the above configuration, since the conveying heald 2.2 passes through the pressurizing chamber 1.1, the conveying heald 2.
If there was any foreign matter attached to 2, there was a risk that the foreign matter would directly enter the pressurizing chamber.

The present invention has been made to solve the above problems, and provides a continuous pressurizing device that can solve the problem of leakage of pressurizing fluid and is configured to prevent foreign matter from entering the pressurizing chamber. The purpose is to

"Means for Solving the Problems" In order to solve the above problems, the present invention provides a pair or more pressurizing devices each having a pressurizing chamber having an opening, which are arranged one above the other with the openings facing each other, and pressurizing At least one pair of conveyor belts passing through and circulating between the openings of the apparatus are provided, and the object to be compressed is conveyed while being sandwiched between the pair of conveyor belts, and the object is conveyed while being held in each pressurizing chamber. In a continuous pressurizing device, a material to be compressed is continuously pressurized and molded via a conveyor belt by the pressurizing fluids of the upper and lower pressurizing devices by introducing a pressurizing fluid into the pressurizing chamber, and the pressurizing fluid is conveyed to the periphery of the opening of the pressurizing chamber. A groove opening toward the belt side is formed, a sliding member is fitted into the groove so as to be movable up and down, and the pressing device is provided with a suppressing means for pressing the sliding member toward the conveyance heald side; A storage groove that opens toward the conveyor belt is formed on the outer side of the groove at the periphery of the opening of the pressurizing chamber, and a seal member is fitted into the storage groove so as to be movable up and down, and the seal member is attached to the pressurizing device. It is provided with a pressing means for pressing the member toward the conveyance heald.

"Operation" The sliding member is pressed against the conveyor belt side, and the opening of the pressurizing chamber of the pressurizing device is closed by the conveyor belt and the sliding member, so fluid can be pressurized into the pressurizing chamber, and this pressurization The object to be compressed is continuously pressed and molded by a fluid through a conveyor belt with a uniform pressing force. Furthermore, a knoll member is provided on the outer side of the sliding member at the peripheral edge of the pressurizing device, and this sealing member is lightly pressed against the conveyor belt, so that the pressurizing fluid leaking outward through the sliding member is prevented. It is blocked by a sealing member. Further, the pressurized fluid blocked by the seal member is discharged to the outside of the pressurizing device through the discharge hole.

``Example'' Figures 1 to 3 show an example of the present invention. It has roughly the same configuration as the pressure device, but the parts described below are different. Note that the same components as those of the continuous pressurizing device described based on FIGS. 5 to 7 are designated by the same reference numerals, and their description will be omitted.

First, in the continuous pressurizing device of this embodiment, in one pressurizing device A′ disposed above the conveyor belt 2.2, the pressure inside the groove portion 8 is applied to the peripheral edge of the pressurizing device A′. A supply hole II' for supplying sealing fluid to the space IO is formed to open on the upper surface side of the pressurizing device A'.

Further, a supply hole +4' for supplying sealing fluid to the hole 13 of the sliding member 9 is formed to open on the upper surface side of the pressurizing device A.

Then, at the peripheral edge of the pressurizing device A°, the supply hole 14'
Further outward (on the left side in FIG. 1) is a storage groove 15 that opens toward the conveyor belt 2, and a seal member 16 is fitted into this storage groove 15 so as to be slidable up and down. There is. This sealing member 16 can be made of materials such as rubber, plastic, soft metal, and felt.

Further, the upper part of the storage groove 15 is opened to the upper side of the pressurizing device A' by an introduction hole 17, and sealing fluid is supplied to the storage groove 15 through the introduction hole 17, and the sealing member 16 is conveyed. It can be pressed against the belt 2 side.

Furthermore, a discharge space S is formed by the seal member 16, the peripheral edge of the pressure device A', the sliding member, and the conveyance heald 2, and this discharge space S is formed at the peripheral edge of the pressure device A'. The upper part of the pressurizing device A' is communicated with the outside through a discharge hole 18.

Note that the pressure device A' disposed below the conveyor belts 2, 2 has the same structure as the above-described pressure device A' disposed above the conveyor belts 2.2.

By the way, the planar shape of the pressurizing device A° is rectangular as shown in FIG. It is formed almost all around the circumference of A. In addition, in FIG. 2, the supply hole 14° and the opening of the introduction hole 17 are omitted.

Next, the case of using the pressurizing device having the above structure will be explained.

In order to pressure-form the object H in the continuous pressurization device having the above configuration, the trams 3, 3 are rotated and the conveyor belt 2.2 is moved at a constant speed, as in the case of the conventional device shown in FIG. At the same time, the object to be compressed H is moved while being sandwiched between the conveyor belts 2, 2. Then, a pressurizing fluid is introduced into the pressurizing chambers 1 above and below the conveyor belts 2, 2. In addition, the pressure of the pressurizing fluid at this time is 50 = 1.00 kg/c
The upper limit is about m'.

Through the above operations, the conveyor belt 2 can be pressurized with uniform surface pressure using the pressurizing fluid, and this force can be used to pressurize the compressed object H.
can be applied with uniform surface pressure from above and below.

Moreover, at this time, the compressed object H is heated or cooled due to the temperature difference between the pressurizing fluid and the conveyor belt 22.

In addition, when the compressed object H is pressure-molded, the sliding member 9
The sealing fluid is injected into the recess I2 at a pressure higher than the pressure of the pressurized fluid in the pressurizing chamber L, and this sealing fluid is injected into the recess I2.
2 to the outside of the pressurizing device A° as shown by the arrow in FIG. 1, forming a fluidized bed with a stable thickness in the gap between the sliding member 9 and the conveyor belt 2. Further, a sealing fluid is injected into the storage groove 15 through the introduction hole 17, and the sealing member 16 is pressed against the conveyor belt 2 with an appropriate pressure. The pressing force at this time may be a small pressure of about 0.1 to Ikg/c-. Note that the sealing fluid is supplied to the supply hole 11.
The fluid supplied from 14 may be of a different type.

The fluidized bed makes it possible to completely confine the pressurizing fluid in the pressurizing chamber l, and also to prevent the sliding member 9 of the pressurizing device A° and the conveyor belt 2.2 from coming into contact with each other. Therefore, the conveyor belts 2, 2 are
A pair of upper and lower pressurizing chambers 1 without friction with the sliding member 9 of °
．． It passes between the openings of 1 and 1.

The flow rate of the sealing fluid flowing out from the recess 12 of the sliding member 9 depends on the pressure in the pressurizing chamber 1, the size of the gap between the sliding member 9 and the conveyor belt 2, and the pressure of the pressurizing device A°. It is determined by the surface conditions of the peripheral edge and the conveyor heald 2, the viscosity of the sealing fluid, etc.

Here, in order to reduce the friction between the sliding member 9 of the pressurizing device A'' and the conveyor heald 2 to the level of fluid friction and reduce the driving force of the conveyor heald 2, it is necessary to It is necessary to maintain the interval at a constant value within a range of about 01 μm=1 mm.

The sliding member 9, the pressurizing chamber IO, and the supply holes 11° and 14° play this role.

That is, due to the undulations on the surface of the compressed object H, the sliding member 9
The gap between the transfer heald 2 and the transfer heald 2 widens, and in the area where the pressure in the gap decreases, the sealing fluid in the pressurizing chamber IO flows into the sliding member 9.
is pressed against the conveyor belt 2 side to narrow the gap.

On the other hand, in a portion where the gap between the sliding member 9 and the conveyor belt 2 is narrowed and the pressure in the gap increases, the pressure of the sealing fluid in the supply hole 14 causes the sliding member 9 to remove the sealing fluid from the pressurizing chamber IO. Since it is pressed, the gap is widened.

Therefore, the gap between the sliding member 9 and the conveyor belt 2 is maintained substantially constant by moving the sliding member 9 vertically by an appropriate distance following the undulations of the surface of the object to be compressed H.

This not only improves the sealing effect in the gap, but also minimizes the outflow of the sealing fluid from the gap.

However, it is unavoidable that a small amount of the pressurizing fluid leaks from the gap between the conveyor belt 2 and the sliding member 9.

Here, the fluid that has passed through the gap leaks into the discharge space S, but since this discharge space S is closed by the seal member 16 pressed against the conveyor belt 2, the pressurizing fluid that has remained in the discharge space S is It is discharged through the discharge hole 18. Since the pressurizing fluid leaked from the pressurizing chamber 1 can be recovered from the discharge hole 18 in this way, the pressurizing fluid can also be reused. In order to efficiently discharge the pressurized fluid from the discharge hole 18, a suction device may be provided separately, or a structure may be adopted in which the pressurized fluid is discharged naturally without providing any special device.

Furthermore, if there is any foreign matter attached to the conveyance heald 2.2, there is a risk that the foreign matter will enter the pressurizing chamber II by the conveyance heald 2.2. Since it is scraped by .16, the pressure chamber 1.
There is no risk of intrusion into 1. Therefore, the sealing member 16 can function as a dust scraper for removing foreign matter that adheres to the transport heald surface and enters the pressurizing chamber 1.

Note that the pressure in the discharge space S is much lower than the pressure in the pressurizing chamber 1, and is usually close to atmospheric pressure. The pressure for pressing the seal member 16 should be set to <0.0 as described above, since it is sufficient to prevent the pressurized fluid leaked into the discharge space S from leaking to the outside of the seal member 16. A low pressure of about 1 to 1 kg/cmt is sufficient.

FIG. 4 shows a second embodiment of the present invention, and the continuous pressurizing device A'' of this embodiment is designed to further completely prevent leakage of the pressurized fluid by connecting the sealing member 16 to the pressurizing device. This is a configuration in which two units are provided at the periphery of A°.

That is, in the peripheral portion of the pressurizing device A' of the first embodiment, another storage groove 25 is provided further outside the storage groove 15, and the seal member 26 is fitted into this storage groove 25 so as to be vertically movable. An introduction hole 27 is provided in communication with the storage groove 25, and a discharge hole 28 is provided between the introduction hole 27 and the introduction hole 17.

Is it possible to achieve the same effect as the previous embodiment with the above configuration? In the structure of this embodiment, even if pressurized fluid leaks through the seal member 16, the seal The pressurizing fluid can be dammed by the member 26.

By the way, in the embodiment described above, one or two seal members are provided outside the sliding member 9, but three seal members are provided outside the sliding member 9.
Of course, more than one may be provided. Further, in the above embodiment, fluid pressure is used as means for pressing the sliding member 9 and the sealing member 16.26, or the groove portion 8
Alternatively, an elastic body such as rubber or a spring, or a container made of an elastic body capable of supplying pressurizing fluid may be inserted into the storage groove 15.25, and the sliding member 9 can be moved by the elastic force of the elastic body. Alternatively, a configuration may be adopted in which the seal member 1626 is pressed.

Furthermore, the following modifications can be considered to each of the above embodiments.

(2) A heating device or a cooling device is provided inside and outside the pressurizing chamber 1, so that it can be heated or cooled freely.

(2) The pressurizing chamber 1 is divided into a plurality of chambers, and the temperature can be changed for each divided chamber, so that pressure molding can be performed under various temperature conditions.

(2) The drum 3 is configured to be able to be heated freely, and furthermore, a preheating device is provided between the drum 3 and the pressurizing chamber 1, so that the conveyor belt 2 and the object to be pressed H can be preheated.

(2) Rather than having a structure that allows the pressurizing fluid to be circulated as in the previous embodiment, the structure should be such that the pressurizing fluid can be pressurized in a sealed state without circulation.

"Effects of the Invention" As explained above, the present invention introduces pressurizing fluid into the pressurizing chambers of the upper and lower pressurizing devices, and also provides a conveying heddle that circulates between the upper and lower pressurizing chambers, and Since pressure molding is carried out while conveying the object to be compressed while being sandwiched therebetween, the object to be compressed can be continuously pressure molded with uniform pressure.

In addition, since the sliding member provided on the peripheral edge of the pressurizing device is pressed toward the conveyor heald side, and the sealing member provided on the outer side is pressed against the conveyor belt, the pressurizing fluid leaks through the sliding member. can be dammed up by the sealing member, and it is possible to prevent the pressurizing fluid from flowing out to the outside of the pressurizing device and being lost.

Further, since the pressurizing fluid that has been dammed and stopped by the sealing member can be discharged through the discharge hole, it is easy to recover the leaked pressurizing fluid, and the pressurizing fluid can be reused. Further, since the sealing member contacts the conveyor belt, foreign matter adhering to the conveyor belt can be scraped off, thereby preventing foreign matter from entering the pressurizing chamber.

[Brief explanation of drawings]

FIG. 1 is a sectional view of the main parts of the first embodiment of the present invention, FIG. 2 is a schematic plan view of the pressurizing device, FIG. 3 is a sectional view taken along line B-B in FIG. 2, and FIG. A sectional view of the main parts of the second embodiment of the present invention,
Figures 5 to 7 show a continuous pressurizing device for which the applicant of the present invention has previously applied for a patent. Figure 5 is a configuration diagram, Figure 6 is an enlarged configuration diagram of main parts, and Figure 7 is an enlarged sectional view of the main part. A', A''...pressurizing device, l...pressurizing chamber, part, 2...
Transport heald, 3... tram, 8... sliding member, lO.
・・Pressure space, II supply hole, 15.25・・Storage groove, r
6, 2 material, 17.27・Introduction hole, 18.28...Object to be compressed. la... Opening groove, 9 14°, 6, seal, discharge hole, H

Claims (1)

[Claims] A pair or more pressurizing devices each having a pressurizing chamber having an opening are disposed one above the other with the openings facing each other, and the pressurizing device is provided between the openings of the pressurizing device, and the pressurizing device is provided with a pressurizing chamber having an opening. At least one pair of circulating conveyor belts is provided, and the object to be compressed is conveyed while being sandwiched between the pair of conveyor belts, and a pressurizing fluid is introduced into each pressurizing chamber to control the upper and lower pressurizing devices. In a continuous pressurizing device that continuously pressurizes an object to be compressed via a conveyor belt using a pressurizing fluid, a groove portion opening toward the conveyor belt side is formed at the periphery of the opening of the pressurizing chamber, and an upper and lower groove is formed in the groove portion. A sliding member is movably fitted into the pressurizing device, and the pressing device is provided with a pressing means for pressing the sliding member toward the conveyor belt. A storage groove opening toward the conveyor belt is formed, a sealing member is fitted into the storage groove so as to be movable up and down, and the pressing device is provided with a pressing means for pressing the sealing member toward the conveyor belt. A continuous pressurization device featuring: