SU1641631A1 - Device for cooling of polymeric sheet material - Google Patents

Abstract

The invention relates to the processing of polymeric materials and can be used to cool strip polymeric materials, in particular long rubber cloth. The purpose of the invention is to save liquid cooling agent. For this, the zones of the supply channels 6 corresponding to each cell are limited by deaf partitions 11. In the zones on the carrier plate 2, bimetallic plates 12 are equipped with valves 13 to close the inlet openings of the connecting channels. Drops of the cooling agent condensed on the surface of the cooled material are blown off by air to the restricted zones of the channels 6. The droplets heat up the plates 12 and bend, and the agent flows through the connecting channels into the cells 3. The plates 12 are set so that each cell along the cooled material 3 is fed by a smaller amount of cooling agent. 4 sludge.

Description

WITH/

WITH

The invention relates to the processing of polymeric materials and can be used to cool strip polymeric materials, in particular long rubber agent.

The purpose of the invention is to save liquid cooling agent.

FIG. 1 shows a cooling device, a cross-section; in fig. 2 shows section A-A in FIG. one; in fig. 3 - inlet opening of connecting channels with valves; in fig. 4 - the same, valves are closed.

A device for cooling a polymeric tape material comprises a chamber 1 for creating a dynamic cushion under the material being cut in the shape of a truncated pyramid and a carrier plate 2 mounted thereon with 3 cells in which

evenly spaced holes 4 in the form of confusion, interconnected by means of channel 5 (Fig. 1). Liquid cooling agent is supplied to each cell through longitudinal feed channels 6, made in carrier plate 2, and through connecting channels 7. Pipe 8 serves for supplying compressed air to chamber 1, and pipe 9 for possible removal of excess cooling agent from channels 6. In channels 6, cut-off visors 10 are installed. The 3 zones of power channels 6 corresponding to each cell are limited by deaf partitions 11, the upper cut of which is flush with the upper cut of channels 6 (Fig. 2). In the zones on the carrier plate 2 by means of bimetallic planes

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Since the valves 12 are installed, the valves 13 are used to close the inlet openings of the bimetallic plate 12 facing the bottom of the channel 6; the lower layer has a linear expansion coefficient smaller than the upper one. Within each partitioned zone of channels 6 that are isolated from each other by partitions 1, valves 13 on bimetallic plates 12 have a single fixed position. In this case, one end of the plate 12 is rigidly connected to the bottom of the channel 6, and the second to the valve 13 (FIG. 3). To fill the system with an armature (not shown), each communicates with the corresponding cell 3.

The device works as follows.

Compressed air is supplied to the plenum 1 through the pipe 8. At the same time, having passed through the openings 4 of the cells 3 of the plate 2, the air enters under the web of polymeric material 16 and creates an air gap here. Liquid cooling agent, for example, water flows through the manifold nozzles 15 into the cells 3. Since the upper section of the openings 4 of the cells 3 is on the same level, water simultaneously feeds all the holes of the cells 3 of the plate 2 at the same time. At the same time, try to fill the confusers holes 4, water is ejected, dispersed by air streams into small droplets. Water on the dust is thrown to the surface of the cooled material 16, is deposited on it and is heated. Drops of water under the dynamic influence of air flows are blown off from the heated surface of the polymer material 16 and. the cut-off peaks 10 flow mainly into the 3 zones of the channels 6 corresponding to each cell. Exhaust air is thus freely displaced into the environment. Since as a result of heat exchange, water acquires a temperature greater than the initial one, the bimetallic plates 12 are deformed and the valves 13 form annular gaps with the inlets 14. Since the level of the upper cut-off of the openings 4 of the plate 2 is below the bottom of the supply channels 6, when there is a sufficient amount of water accumulated in the latter, according to the law of communicating vessels, the water flows through the connecting channels 7 into the corresponding cells 3. At this moment the supply stops using the fittings fluids through the manifold nozzles 15. As a result of heat exchange during dispersion, the waste water, when returned to the wells, acquires the quality of a fresh refrigerant. After a certain period of time in the system, a balanced state occurs, characterized by the fact that, depending on the temperature of the polymer

the web at a predetermined location of the length of the device returns a certain amount of coolant with an acquired temperature to the appropriate cell from the feed channel. Customized

0 bimetallic plates 12 with valves 13 due to the thermal effect of the waste liquid in the supply channels 6 regulate the supply of refrigerant in such a way that each subsequent flow

5, during the movement of the polymer web 16, the cell 3 is supplied with a smaller amount of cooling agent.

In the place of the device where the polymer material 16 has acquired technologically

0 the predetermined final temperature of cooling, the valve 13 of the bimetallic plate 12 completely covers the opening 14 of the connecting channel 7 of the corresponding / cell 3. The subsequent cells 3 of the carrier

5, the surfaces of the plate 2 are not supplied with a liquid cooling agent, and the polymer web 16 is then moved along the device on an air cushion, which makes it possible to combine the process of drying the cooled polymer 16 of this by simultaneous transportation. In the process of transporting the polymer web 16 along the carrier plate 2 of the device cooling fluid from each

The 5 cells are partially entrained by the moving material in the next moving cells.

At overflow of isolated sections of channels 6 with waste liquid

0 it is discharged through nozzles 9 either to the drain or to re-feed. In order to compensate for that part of the coolant that evaporates from the surface of the polymer web 16 to be dried and

5 is discharged to the drain; the predetermined flow rate of the liquid refrigerant is maintained to the first in the direction of movement of the belt 16, the cell 3 of the plate 2 through the manifold nozzle 15. Cooling of the polymer web can

0 to be intensified by surface air-blowing, for example, a fan system (not shown).

The proposed device allows you to organize almost closed circulation

5 liquid refrigerant and is capable of automatically after a predetermined period of time for a balance to reconfigure for processing when switching from one type-size of the polymer web to another. In the latter case, it changes

the length of the power supply area of the device coolant.

Claims (1)

Apparatus of the Invention A device for cooling a polymeric band material, comprising a chamber for creating a dynamic cushion under the material being processed, a profiled support plate with cells on the working surface mounted on it, in the bases of which there are holes for the working medium to escape from the chamber, BUT LA D. / g wm / m five 0 An apparatus for supplying a liquid cooling agent to cells in the form of longitudinal feed channels and connecting channels made in the carrier plate, characterized in that, in order to save a liquid cooling agent, the zones of the feed channels corresponding to each cell are limited by deaf partitions, and in the zones on the carrier plate bimetallic plates mounted valves to close the inlet of the connecting channels. f Cool 2 one eight Szh.Vozd. / H FIG. one LA bozs FIG. 2 7 # fcJ