SU1719236A1 - Device for continuous molding of polymer strip material - Google Patents

Abstract

The invention relates to the processing of polymers. The purpose of the invention is to increase the pressing pressure. To achieve the goal, in the device, which contains storey transport belts, adjacent upper and lower chambers, the cavities of which are connected to a source of liquid medium under pressure and in which pressing plates with throttling openings and rods are mounted, The pressing plates are made with cavities communicating with throttling openings and rods that are connected to a supercharger of the lubricating fluid. 3 il.

Description

The invention relates to polymer engineering and can be used for the continuous molding of sheets from various polymeric materials.

The purpose of the invention is to increase the pressing pressure.

FIG. 1 is a schematic diagram of the device; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. 2

A device for forming sheets of polymeric materials consists of conveyor belts T, 2, pulled on drive drums 3-6. Drums 3, 5 are equipped with electric heaters. An upper pressure chamber consisting of sections 7, 8 and a lower pressure chamber consisting of sections 9,10 are adjacent to the conveyor belts. The enclosures of the pressure chambers are rigidly connected by clamping bolts. The sections are mounted along the length with temperature breaks, which can be filled with heat-insulating gaskets 11. In the pressure chambers there are cavities 12 in which

clamping elements 13 are mounted with the ability to move along the depth of the cavity. On one of the chambers clamping elements 13 can be fixed rigidly. The surface of the clamping elements 13 is covered with wear-resistant anti-friction material. The cavities 12 of the pressure chambers through the nozzles 14 communicate with a source of compressed medium (gas or liquid). In the clamping elements 13, cavities 15 are made. On the side of the conveyor belts, the throttling holes 16 and the drainage grooves 17 are made in the clamping elements 17. The clamping elements 13 are provided with rods 18, 19, in which the channels 20, 21 are made. The cavities 15 of the clamping elements 13 through the nozzle 22, the channel 20 in the rod 18, the heat exchanger and the filter communicate with the superchargers of the lubricating thermostating fluid (not shown in the figures). The belts on the sections of the pressure chambers are made with grooves 23 in which the seals 24 are mounted. Along the perimeter of the clamping

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the elements are mounted seals 25. Seals 26 are mounted between the rods and the bodies of the pressure chamber sections. The drainage channels 27 and the channels 21 in the rods 19 communicate with the intake nozzle of the thermostatically controlled lubricant.

The device for forming sheets of polymeric materials as follows.

Set the gaps between the drive drums on the thickness of the molded sheet. The reels 3.5 are heated to the temperature at which the material is molded. The moldable material 28 is fed into the gap and the belts 1, 2 are moved in the direction of the arrow, the molded material is heated, compacted, takes the form of a sheet and, together with the belts, moves between the upper and lower pressure measures. Through the nozzles 14 sections 7 and 8 in the upper pressure chamber in the cavity 12, a compressed medium is fed under pressure, which ensures high-quality pressing of the material to be formed. Under the action of a compressed medium, the clamping elements 13 of the upper chamber move and d transfer the pressing pressure onto the material, pressing the tape to the lower clamping elements 13. Through channels 20 in rods 18 and fitting 22 in the cavity 15 of clamping elements 13 from the supercharger through a filter and a heat exchanger (in the figures not shown) serves a lubricating thermostatic fluid, which passes through the throttling apertures 16 and provides fluid friction between the belts and pressure members, and a lubricating thermostatic fluid through the drain holes 17 flows through the drainage channels 27 and channels 21 in the rods 19 to the intake pipe of the supercharger. The pressure and flow rate of the thermostatic-lubricating fluid is established from the condition of preventing wear of the working surfaces of the clamping elements and belts, ensuring the minimum value of the coefficient of friction and the required temperature in the area of pressing. Thus, in the cavity of the clamping elements of sections 7.9, a lubricant-thermostatic fluid heated to the molding or polymerization temperature of the moldable material 28 is fed, and in the cavity of the clamping elements of sections 8, 10 a cooled lubricating thermostatic fluid i is fed, which cools the material in the pressing zone and the finished product 29 is separated from the ribbons.

To increase the efficiency between the pressure chamber sections, a temperature gap is made in which the thermal barrier strip 11 is mounted. A seal 24, 25, 26 is used to prevent leakage of the thermostatic fluid.

FORUMAWLAH AND ISLANDS

A device for continuous forming of a tape polymer material containing floor-standing drive endless belts adjacent to the tapes of the upper and lower pressure chambers with cavities connected to pressurized fluid supply means placed in the cavities of the pressure chambers pressure plates with throttling holes on the side of the tapes and with rods

for transporting a thermostatic-lubricating fluid, characterized in that, in order to increase the pressing pressure, the pressure plates are made with internal cavities communicating with

throttling holes and by means of rods - with a supercharger of lubricating-thermostatic liquid, -l

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Claims (1)

Claim A device for continuous molding of tape polymer material containing floor-mounted drive endless belts adjacent to the belts of the upper and lower pressure chambers with cavities in communication with means for supplying liquid under pressure, pressing plates placed in the cavities of the pressure chambers with throttling holes on the side of the tapes and with rods for transporting a thermostatic lubricant, characterized in that, in order to increase the pressing pressure, the pressing plates are made with internal by cavities communicating with throttling holes and by means of rods - with a supercharger of lubricating and thermostatic fluid, -l / 4-D ΤΙ FIG. 2