SU895688A1 - Roller-type extruder for treating polymeric materials - Google Patents

Description

one

The invention relates to equipment for processing polymeric materials, e.g. rubber compounds, and can be used in tire and rubber industrial industries to produce strip blanks, for example, tire treads.

A known extruder for processing polymeric materials, containing two rolls rotating towards each other and a housing in the form of a padlock with a forming tool, with a cylindrical groove in the shoe, which forms a roll channel with the working surface of the forming tool 1.

The disadvantage of this extruder is the poor quality of rubber compounding, especially for wide bands. This is due to the difficulty of controlling the feed rate of the mixture into the forming tool and its spreading speed across the entire width of the strip when extruding the mixture from the forming tool.

The closest in technical essence and the achieved result. The invention is a roller extruder for processing polymeric materials, comprising a housing and with a water roll forming between them a working gap communicated with the output channel of the forming tool 2.

The disadvantage of the extruder is also the poor quality of the sheet material, especially wide bands, due to the lack of special means for controlling the output of the mixture from the forming tool.

The purpose of the invention is to improve the quality of sheet blending.

15

This goal is achieved by the fact that in a roll extruder for processing polymeric materials, comprising a housing and a drive roller, forming between them a working gap communicated with the output channel of the forming tool, the forming tool is made in a series of plates moving relative to each other and a slider moving it in the direction perpendicular to the direction of movement of the plates.

By moving the individual plates relative to the roll, the amount of the mixture passing through the exit channel in each section along the length of the roll can be changed. By this, it is possible to regulate and equalize the speed of the mixture output to the width of the output channel, to achieve an equal strip of the workpiece. By moving the slider relative to the plates, the thickness of the preform is changed.

FIG. 1 schematically invented proposed bead extruder, longitudinal section; in fig. 2 is a view along arrow A in FIG. one. .

The roller extruder contains a drive roller 1 mounted in the housing 2 and forming with. there is a working gap 3. The housing 2 is equipped with a feed funnel 4. The outer part of the housing is equipped with a jacket 5 communicated with a thermostatic system. On the part of the body 2 opposite to the feed funnel 4 in the guides 6. a slider 7 is mounted, forming an output channel 8 with a series of plates 9, each of which is connected to the mechanism 1, of movement. The slider 7 is moved in the guides 6 by means of adjusting screws 11 in the direction perpendicular to the direction of movement of the plates 9. The slider 7 is equipped with channels 12, which, like the cavity of roller 1, are connected to the α system; thermostatically controlled (not shown) .

The roller extruder operates as follows. The processed material from the mixer (in Fig. 1 n-e shown) through the funnel 4 enters the zone. 13 loads, from which roll 1 is carried into the working gap.

In this case, heat carrier is supplied to the jacket 5 of the housing, channels 12 of the slide 7 and into the cavity of roller 1, which ensures the required temperature of the working parts of the extruder and partial heat removal from the material.

As the material moves in the working gap 3, the material spreads along the roll and enters the output channel 8, from which it comes out in the form of a tape, the thickness of which is regulated

moving the slider 7 in the guides 6 by adjusting screws 11. When the tape is unevenly out through the output channel, 8 rows of plates 9 corresponding to the sections with the highest speed of movement of the tape of material are partially removed from the plate 1 by the mechanisms 10 moving them. In this case, part of the mixture re-enters the loading zone 13, which ensures a reduction in the rate of extrusion in this section of the output channel 8.

The invention, by making a forming tool in the form of a series of movable plates and a slider with means for moving it in a direction perpendicular to the direction of movement of the plates, will allow to obtain equal, smooth mixtures both in length, and in width without bends and in corrugations. This will allow to improve the processes of further processing of the mixture and will contribute to improving the quality of products made from sheet mixtures.

Claims (2)

1. Authors certificate of the USSR, W 448957, cl. B 29 B 1/08, 1973. 2. Authors certificate of the USSR 444686, cl. B 29 F 3/012, 1973 (prototype). -R3 DH at “; u