JPH08118580A - Device for continuous manufacture of multilayer face material - Google Patents

Abstract

PURPOSE: To convert the size of a structure while holding the sealability of a cushion by partially or perfectly restricting a single or a plurality of pressure chambers by an elastically deformable material to perfectly seal them to a pressure plate and an attached press belt in an airtight or liquidtight manner. CONSTITUTION: A slide sheet 12 formed from polytetrafluoroethylene is arranged between a pressure cushion 6 and a circulating press belt 1 to be fixed to the front end surface extending at a right angle to the press belt of a pressure plate 5. In this case, since the fixing of the slide sheet 12 is performed by a fixing screw 14, the slide sheet 12 can be simply converted as an abrasion member. The other end of the slide sheet 12 freely comes into contact with the work belt section of the press belt 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention guides laminated material between two press belts forming a reaction zone,
A device for continuously producing a multi-layered planar material, which is heated and pressurizes the laminated material by at least one of the press belts, in the reaction region on the side of the press belt opposite to the laminated material, in a gaseous or liquid state. At least one pressure chamber is arranged which is loaded with a pressure medium, the pressure chamber cooperating with the pressure plate on the side opposite the press belt.

[0002]

2. Description of the Prior Art Continuously operating presses with at least one endless circulating belt which is pressed onto a workpiece by a pressure medium are known (West German Patent No. 3313406), in which the pressure The medium is introduced on the side of the pressure plate facing the press belt into a rectangular pressure chamber adjacent to the press belt, which is sealed by an annular sealing strip.

The sealing strip is connected to a suitable rectangular frame, which frame is guided in the groove of the pressure plate and is movably mounted in and out of the groove and seals. It is compressively loaded in the direction of a press belt slidably arranged along the strip.

The gap sealed by the sealing strip with respect to the circulating press belt fails due to uneven wear of the sealing strip, tightening of the frame in the groove of the pressure plate, fluctuation of the work width, etc. At times, this results in a loss of pressure medium, which leads to defects on the surface of the product.

Furthermore, a device for applying a surface pressure to a workpiece conveyed by at least one circulating press belt is known (US Pat. No. 2,937,972), said press belt being pressed inside the press belt. The work piece is crimped onto the work piece by means of a pressure medium in the pressure chambers which are arranged one behind the other in the effective pressing surface of the belt, said pressure chambers being provided with sealing strips.

In the case of this construction as well, if a failure occurs during operation, the pressure medium flows out through the gap between the sealing strip and the press belt.

[0007]

SUMMARY OF THE INVENTION The object of the present invention is to eliminate the need for directly limiting the pressure chamber by means of the press belt, thus eliminating the sealing gap between the circulating press belt and the lateral limit of the pressure chamber. The object is to provide a device of the type mentioned at the outset.

[0008]

According to the present invention, the above-mentioned problem is solved by the present invention, in which a pressure chamber or a plurality of pressure chambers are partially or completely limited by an elastically deformable material, and a press plate and an endless circulating press belt. It is solved by providing a slide sheet between the pressure chamber or chambers and the endlessly circulating press belt, which is hermetically or liquid-tightly sealed against.

[0009]

Advantageously, the pressure chambers are embodied as side-by-side elastic tubes which are loaded inside by the pressure medium and which are connected to one another on the end side by distribution channels. .

The pressure chamber can be bounded on the side facing the press belt by means of an elastic diaphragm, the free edge of which is completely sealed to the surrounding atmosphere and fixed to the pressure plate.

Since the pressure chamber or chambers can be constituted by a cushion which closes the pressure chamber and is internally loaded by a pressure medium, it can be machined in the device without adversely affecting the sealing properties of the cushion. You can change the size of things.

If the slide seat is arranged as a separate functional member between the pressure cushion and the endless circulating belt, the slide seat forming the wear member can be easily replaced.

The heat generated due to the friction between the slide sheet as a wear member and the endless circulating belt is used as process heating.

Further advantageous configurations are given in the other claims.

[0015]

The double-belt press according to FIG. 1 has an endless circulating press belt 1 whose working belt section limits a press gap for a workpiece 3 in a reaction zone 2. In this case, the work piece 3 passes through the double belt press in the direction of arrow 4. The reaction area 2 is formed on each side by a pressure plate 5 and a pressure cushion 6.

The pressure plate 5 is composed of an insulating plate 7 and a heating plate 8.

The pressure cushion 6 is formed in the embodiment of FIGS. 1 to 4 and 6 by an inherently elastic tube 10, which extends at right angles to the press belt 1 and is juxtaposed to each other. And is loaded internally with a pressure medium. The pressure medium can be gaseous or liquid or hydropneumatic.

In FIG. 2, the pressure cushion 6 is shown in plan view.

Since the inner chambers of the tubes 10 juxtaposed to one another are connected to each other on the longitudinal side of the pressure cushion 6 by a distribution passage 11, the pressure medium is introduced into one of the distribution passages 11, which can be formed by a metal part. . The pressure medium can either be provided stationary or be guided in a circulating manner.

In the embodiment shown in FIG. 1, a slide sheet 12 is provided between the pressure cushion 6 and the circulating press belt 1.
The slide sheet 12 is made of polytetrafluoroethylene and is fixed to the front end surface 13 of the pressure plate 5 extending at right angles to the press belt 1.

In this case, since the fixing is performed by the screw 14, the slide sheet 12 can be easily replaced as a wear member. The other end of the slide sheet 12 freely contacts the working belt section of the press belt 1.

In the embodiment shown in FIG. 6, the slide sheet 12 arranged between the pressure cushion formed by the tube 10 and the press belt 1 has the pressure plate 17 on both end surfaces 1 thereof.
5 and 16 are fixed so as to be dissociated.

As a modified embodiment of this construction, a winding or payout roller for a slide sheet may be provided before and after the pressure plate when viewed in the direction of conveyance of the workpiece 3.

The slide sheet 12 can also be formed as an endless belt that circulates a pressure plate.

FIG. 3 shows a partial sectional view of a double belt press during no-load operation, in which the inner chamber of the tube 10 is filled with pressure medium but the tube is not deformed. As a result, the press gap is limited.

FIG. 4 shows a partial sectional view of a double-belt press similar to that of FIG. 3 during production operation, in this case the thickness of the workpiece 3 passing through the reaction zone 2 of the double-belt press. Intrinsically elastic tube 10 based
Transforms into an ellipse.

Workpieces of any size can be guided via the reaction zone 2 without causing airtightness and pressure medium outflow into the atmosphere in the pressure cushion range.

In the embodiment described above, the pressure cushion is formed by an intrinsically elastic tube extending at right angles to the direction in which the workpiece is conveyed, whereas in the embodiment of FIG. 5 the pressure chamber 18 is elastic. The diaphragm 19 has a free edge 20 which is tightly fixed to the pressure plate 5.

In the pressure chamber, the working pressure is formed by the gaseous or liquid pressure medium introduced via the pressure plate.

Also in this embodiment, the slide sheet 21 is provided between the diaphragm 19 and the press belt 1 of the belt press.
Is arranged. In the illustrated embodiment, the slide sheet 2
1 is detachably fixed only to the end face 13 of the pressure plate 3 by a screw 14.

The slide sheet 21 can also be formed as an outer layer of the diaphragm. The slide sheet 21 can also form the inner layer of the press belt which cooperates with the pressure chamber.

Since the tube 10 can be provided with a sliding layer on the outside, the slide sheet 12 can be omitted.

In the embodiment shown in FIG. 6, since the pressure cushion 6 and the pressure plate 17 assigned to each press belt 1 are composed of a large number of unrelated constituent units 22, it is necessary to replace the constituent units. Even if there is
Production operation can be continued.

In the embodiment shown, the pressure plate 17 has a horizontal guide surface 23 extending at right angles to the press belt, which guide surface 23 is slidable on a guide surface 24 which is stationary on the frame. It is supported so that it can be hooked.

The working pressure in the sealed pressure cushion has a pressure range of up to 20 bar and a temperature range of 25.
It reaches 0 ℃.

The device operates without noise and is easy to maintain.

FIG. 7 illustrates the reaction area of another embodiment of the double belt press during no load operation and FIG. 8 during press operation.

In these embodiments, the pressure plate 5 and the pressure frame 25 are
A pressure cushion made up of a tube 26 is arranged between the pressure cushion and the tube 26.
The pressure in 6 is higher than the pressure in the tube 10 forming a pressure cushion between the pressure plate 5 and the press belt 1.

The compression loading of the tube 26 forms an elastic support between the pressure plate 5 and the pressure frame 25, which support is used as an additional heat insulating means and which also serves as the pressure frame 25. To compensate for the deflection.

The elastic tube 26, which is loaded with the pressure medium therein, extends, like the tube 10, at right angles to the conveying direction 4 of the workpiece and is connected on the end side by a distribution passage for the pressure medium. ing.

In the embodiment shown in FIG. 9, roller carpets 27 are provided between the pressure plate 5 and the press belt 1 so as to be guided so as to circulate endlessly.

Between the pressure plate 5 and the pressure frame 25, a pressure cushion composed of elastic tubes 26 juxtaposed to each other is arranged. In this pressure cushion, the elastic tubes 26 are arranged inside. Loaded by pressure medium. On the end side, the tube 26 is connected via a distribution channel for the pressure medium.

[Brief description of drawings]

FIG. 1 is a schematic side view of a double belt press in which an airtight or liquid-tight pressure cushion is assigned to each press belt in the reaction area.

FIG. 2 is a view seen in the direction of arrow II in FIG.

FIG. 3 is a diagram showing a part of a reaction area of a double belt press during press-free operation.

FIG. 4 is a diagram showing a part of a reaction area of a double belt press when a workpiece passes through.

FIG. 5 is a longitudinal sectional view of a pressure cushion limited by an elastic diaphragm sealed against a pressure plate.

FIG. 6 shows the reaction area of a double-belt press with a number of interchangeable building blocks, each with one sealed pressure cushion.

FIG. 7 is a view showing a part of a reaction region during press-free operation, which is provided with an additional pressure cushion between a pressure plate and a pressure frame.

FIG. 8 is a view showing the reaction area of FIG. 7 when a workpiece passes through.

FIG. 9 is a vertical sectional view of a double belt press provided with a roller carpet.

[Explanation of symbols]

 1 Press Belt 2 Reaction Area 3 Workpiece 5,17 Pressurizing Plate 6 Pressurizing Cushion 7 Insulating Plate 8 Heating Plate 10,26 Tube 11 Distribution Passage 12,21 Slide Sheet 13,15,16 End Face 14 Screw 18 Pressure Chamber 19 Diaphragm 20 Free edge 22 Constituent units 23, 24 Guide surface 25 Pressure frame 26 Roller carpet

Claims (18)

[Claims] 1. A multi-layer sheet material or another material, in which the laminated material is guided between two press belts forming a reaction zone, heated or cooled and the laminated material is pressed by at least one of the press belts. An apparatus for continuously producing workpieces, wherein at least one pressure chamber loaded with a gaseous or liquid pressure medium is arranged on the side of the press belt facing away from the laminated material in the reaction zone, In the type in which the pressure chambers cooperate with the pressure plate on the side opposite to the press belt, the pressure chamber or chambers are partially or completely restricted by the elastically deformable material, 5, 17) and the associated press belt, which is completely airtight or liquid-tightly sealed and has a slide sheet (1) between the pressure chamber or chambers and the press belt. 2, 21) are provided for continuously producing a multi-layered sheet material. 2. Device according to claim 1, wherein the slide sheet (12) is fixed only to the front end face (13) of the pressure plate (5) extending at right angles to the transport direction (4). 3. The slide sheet (12) is a pressure plate (5).
Device according to claim 1, fixed to both end faces (15, 16) of the. 4. Device according to claim 1, characterized in that before or after the pressure plate (5) there are winding or pay-out rollers for the slide sheet (12). 5. The device according to claim 1, wherein the slide sheet is guided as an endless belt that circulates through the pressure plate. 6. The pressure chambers are constructed as juxtaposed elastic tubes (10) inside which are loaded by a pressure medium, which tubes are connected to one another on the end side by distribution channels (11). The device of claim 1, wherein: 7. The device according to claim 6, wherein the tube (10) extends at a right angle to the conveying direction (4) of the workpiece. 8. The pressure chamber on the side facing the press belt,
2. A diaphragm (19), which is bounded by a resilient diaphragm (19), the free edge (20) of which is sealed against the ambient atmosphere and fixed to the pressure plate (5). apparatus. 9. Device according to claim 8, characterized in that the slide sheet is arranged as a replaceable component between the diaphragm (19) and the press belt (1). 10. The slide sheet is a diaphragm (1
Device according to claim 8, which is formed as an outer layer according to 9). 11. An endless circulating press belt (1) is provided, the slide sheet being formed as an inner layer of the endless circulating press belt (1) cooperating with a pressure chamber. The described device. 12. The device according to claim 6, wherein the tube (10) is provided with a sliding layer on the outside. 13. A pressure cushion associated with an endless circulating press belt (1) and associated pressure plate (17) are composed of a number of interchangeable component units (22) which are independent of one another. 13. The device according to claim 1, wherein the component units each have a pressure cushion sealed to the pressure plate (17) and the press belt (1). 14. The pressure plate (17) has a horizontal guide surface (23) extending at right angles to the conveying direction (4),
This guide surface (23) is a guide surface (24) fixed on the frame.
14. The device of claim 13, which is slidably mounted on the. 15. Disposed between the pressure plate (5) and the pressure frame (25) are juxtaposed elastic tubes (26) inside which are loaded by a pressure medium. 2. The device according to claim 1, which is connected to each other on the end side by a distribution passage. 16. The device according to claim 15, wherein the tube (26) extends at right angles to the workpiece transport direction (4). 17. Device according to claim 15 or 16, wherein the pressure in the tube (26) is higher than the pressure in the pressure cushion arranged between the pressure plate (5) and the press belt (1). 18. A pressure cushion is provided between the pressure plate (5) and the pressure frame (25), and the roller carpet (27) is provided between the pressure plate (5) and the press belt (1). 16. The apparatus according to claim 15, wherein is arranged.