DE1930223B - With a wave-shaped pressing surface formed pressing device within a plant for the production of corrugated asbestos cement panels - Google Patents

Description

i 930

table which is versehui on its upper side with holes which are connected to a suction device 9 (Fig. 2) via a system of connecting lines. In this way it is achieved that the asbestos pulp, immediately after it has been applied to the conveyor belt 2, the water is removed again. The platen press 3 shown in Fig. 2 in section consists of two formed with wave-shaped pressing surface of the press plates 4 and 5. The conveyor belt 2 runs at the ία on it applied and already partially dewatered asbestos cement layer in between the two Pressenplatien4 and 5 therethrough. The remaining water still contained in the asbestos cement layer m is pressed out during the pressing process in the platen press 3 and discharged via bores 10 arranged in the lower press platen 5, which are also connected to the suction device 9.

A rubber structure 11 is arranged under the upper press plate 4. The upper press plate 4 has Bores 12 and groove-like recesses 13 on the profile flanks of the waves. The holes 12 can, according to the respective work cycle, with a suction system 14 or a pressure system 15 can be connected. The pressure generated by the pressure system 15 is via a liquid that is in the Bores 12 penetrates, transferred to the rubber skin 11. Are the holes 12 with the suction system 14 connected, the rubber skin II is created by the negative pressure generated by the suction system 14 sucked firmly to the upper press plate 4.

The operation of the system described is as follows: First, the platen press 3 is opened and the rubber skin 11 is held on the upper press platen 4 by negative pressure. At the same time, the conveyor belt 2 is set in motion, pulp is applied to the conveyor belt 2 from the material dispensing station and the section of the conveyor belt 2 that has already been coated is introduced into the platen press 3. After the conveyor belt 2 is stopped, uie press plate 3 is closed, wherein the upper press plate 4 autsetzt initially in the wave troughs and on the wave crests and the lying there parts of the asbestos cement layer m precompressed. The negative pressure is then reduced with the pressure system 15 and pressure is generated. Through the bores 12 and the groove-like recesses 13, the liquid is against the rubber housing. Pressed 11, and the pressure is increased so that the Gummi.-iaut 11 exerts a uniformly over the entire surface of the asbestos cement layer in distributed contact pressure.

1 sheet of drawings

Claims (2)

a pressing device of the claims described at the beginning: to be raised, in which the press tools are designed in such a way! Miul. ~ That a material shift under the Wi- 1. With a wave-shaped pressing surface recess of the press tools is excluded, so formed pressing device within a plant 5 that all areas of the asbestoszemeiuzuni to be produced Manufacture of corrugated asbestos cement panels subjected to an even pressure len with an endless, with wavy be. Cross-section guided conveyor belt, a The invention solves this problem by duss the Material feed station and one below the pressing device as a plate press with above and Dewatering equipment arranged below the conveyor belt. Presriclming arranged below the conveyor belt. characterized in that the plate is formed in that the two presses die Pressing device as a plate press (3) with plates are each provided with holes that the Above and below the conveyor belt (2) Borrunaen the upper press plate to a suction arranged Press plates (4 or 5) are trained or pressure system connected that the upper det is. that the two press plates (4 and 5) 15 press plate on the profile flanks of the shafts nutarjeweils with bores (12 or 10) provided tine has recesses, which with the bores are that the bores (12) of the upper presses ■ are in communication, and that under the upper plate (4) to a suction or pressure system (14 press plate a rubber skin is arranged, which or 15) are connected so that the upper press is attached to the upper plate by means of the suction or pressure system (4) on the profile flanks of the shafts 40 Ren press plate can be sucked or after the Schlienut-like Has recesses (13), r>: e with ßen of the press in the area of the groove-like recesses Bores (12) are in communication, and mung against the asbestos cement plate to be produced A rubber can be pressed under the upper press plate (4). mihaut (11) is arranged, which by means of the ab- The advantages achieved by the invention are suction or pressure system (14 or 15) on 25 can be seen in the fact that in all areas of the upper press plate (4) can be sucked firmly or, according to the loin, corrugated asbestos cement plates are homogeneous the closing of the press is ensured in the area of the nutarti material distribution and in all areas In the recesses (13) against the one to be produced, an even pressing is sufficient. Asbcstzementplatie is pressable. is cash. The arrangement of one of the upper press 2. Pressing device according to Ans fuch 1. Characterized 30 senplatte associated Gummihdut is the self-identified, that the bores (10) the un- lent pressing pressure is not directly through the press center Press plate (5) to a. ibsaugvorrich- plate, but indirectly through a liquid or device (9) are connected and thereby the un- a gas is applied to the asbestos-cement layer, tere press plate (5) part dtr drainage inlet and thereby experience all parts of the to be pressed direction is. 35 plate the same pressing pressure. This also applies in particular to the manufacture of heavily corrugated plates ten. The monitoring and control of the pressing process can be implemented very easily, as with a suction or pressure system is used, The invention relates to one with a waveform! - 40 that can be controlled very safely. In one embodiment of the invention, it is expedient to lialb a plant for the production of corrugated As- moderately the bores of the lower press best cement panels with an endless, with a welienför- plate connected to a suction device and migcm cross-section guided conveyor belt, one of which is the lower press plate part of the drainage Material feed station and one below the 45 transmission device. drainage device arranged on the conveyor belt. In the following the invention is based on an in Pressing devices of the embodiment described above and shown in the drawing Kind are known. For one from the German Pa- explained in more detail. It shows 1 is a schematic representation of a plant the conveyor belt designed as a filter belt, below 50 in the plan view and that in the area of the upper run corresponding to FIG. 2 in an enlarged representation a partial view len-shaped profiled suction box as a development of a vertical cut in the direction of arrows A in Device to be carried. After a drainage Fig. 1. The actual profiling of the GuU-s placed on the conveyor belt shown in FIG. has a Matethcnd of the waveform to be produced profiled rialaufgabestation 1, an endless conveyor belt 2 roller. This known pressing device has and a plate press 3. The conveyor belt 2 has the disadvantage that the material is driven by the roller through two other areas of the profile flanks of the shafts designed as deflection rollers into the drive rollers 6 and is pushed by means of front and rear valleys. This results in structural changes that are not part of the corrugation device arranged after the platen press 3 and an uneven surface 7 with a corrugated cross-section passed through the material distribution in the asbestos platen press 3 produced. The corrugated device panels, with the fact that, because of the 7, there are also the individual gripping rollers 8, due to the fact that there are several comb-like interlocking unequal distribution of material ,
the. The drainage system consists of one The invention is therefore based on the object. under the conveyor belt