SU1039736A1 - Worm type machine for dewatering plastic material - Google Patents

Description

2. The machine screw in the worm shaft on the side of claim 1, on the disk surface on the screw side on the disk and on 1039736 radial loader shaft ty are made.

This invention relates to mechanical engineering and can be used to dehydrate synthetic rubbers.

A known worm screw machine for dewatering plastic materials, comprising a housing, a worm shaft, as well as a device for adjusting pressure in a press chamber with an actuator and a die plate with holes mounted in the housing.

. However, this machine is characterized by design complexity and insufficiently smooth pressure regulation, since the throttling process is two-stage, which reduces the quality of the materials being processed.

The purpose of the invention is to improve the quality of the materials being processed by smoothly adjusting the pressure and simplifying the design.

The goal is achieved by the fact that in a screwdriver for dewatering plastic materials, comprising a housing a worm gear, as well as a device for controlling pressure in a press chamber with an actuator and a spinneret mounted with a hole in the housing, the pressure control device is designed as a housing mounted rotatably and a disk coupled with a filler with grooves whose walls are bounded by cylindrical surfaces with guides in the form of Archimedes spirals kinematically connected with a drive, the axes from The dies are located on cylindrical surfaces with guides in the form of Archimedes spirals, with the said spirals made with a common pole aligned with the axis of rotation of the disk, and the holes of the dies are aligned with the said grooves of the disk

At the same time, radial blades are made on the worm shaft on the disk side and on the disk surface on the worm shaft side.

Figure 1 shows a screw machine for processing plastic materials; FIG. 2 is a section A-A in FIG. one.

The screw-forming machine for processing plastic materials has a housing 1 with a feed funnel (not shown), a screw shaft 2 with cylindrical spirals 3, a disk k with grooves 5 and a spinneret 6 with holes 7. The die 6 and the disk k are coaxial with each other and installed in relation to each other without or with a minimum (0.05-0.25 mm) gap. The disk k through gear 8 is connected with the drive 9. The holes 7 of the spinnerets and the grooves 5 are placed along the matching spirals of Archimedes with a common pole aligned with the axis of rotation of the disk 4. The disk has radially located blades 10, and the blades are made at the end of the screw 2 11, also radially spaced. Chervna machine is equipped with a knife granulator torus 12.

Worm machine for processing plastic materials works as follows.

The material, for example, crumbs of wet synthetic rubber, enters the feed hopper, is captured from the crater by spirals 3 of the worm shaft 2 and moves along the housing 1. The movement is accompanied by an increase in pressure and heating of the rubber along with the water contained in it. The water in the rubber is at a high temperature in a superheated liquid state and cannot evaporate. The rubber is then forced through the openings 7 at the outlet of which the water is instantly evaporated due to pressure throttling to atmospheric pressure.

In this case, the drying efficiency is the higher, the larger the ratio of the surface area of the polymer, extruded through the holes 7 of the spinneret, to the volume of this polymer. Structurally, this is achieved by using the maximum possible number of holes.

At the exit of the openings 7, the rubber cords are broken into pieces (or swell) by the vaporized water vapor and are further crushed by a granulator. Air (gas) is supplied to the granulation zone to transport the rubber granules for further processing and cleaning the granulator knives from the adhering crumb. The disk k is turned manually or from the drive 9 (during operation or stopping of the machine).

Automatic control of the dewatering process is carried out as follows.

03973.64

The impulse from the temperature sensor installed in the output part of the screw-type machine is fed to the converter and. further on the regulator. The output signal from the regulator should be on the actuator - drive 9.

When the disk is rotated with respect to the die 6, one of the edges of the jumpers 13 is moved to the front part of the holes 7, as a result of which the segment overlaps of the living sections of the holes 7 are achieved.

The economic effect of introducing J5 of the invention is achieved by increasing the smoothness of the regulation and simplifying the design.

Claims (2)

1. WORM MACHINE FOR DEWATING PLASTIC MATERIALS, comprising a housing, a worm shaft, as well as a device for regulating the pressure in the pressing chamber with a drive and a die mounted in the housing with holes, because of the fact that in order to improve the quality of the processed materials by smoothly regulating the pressure and simplifying the design, the device for regulating the pressure is made in the form of a disk with grooves, the walls of which are limited, mounted in the housing with the possibility of rotation and mated to the die cylindrical surfaces with guides in the form of Archimedes spirals kinematically connected to the drive, the axes of the die holes are placed on cylindrical surfaces with guides in the form of Archimedes spirals, the spirals being made with a common pole aligned with the axis of rotation of the disk, and the holes of the nozzles are aligned with grooves drive. 2, The worm machine according to claim 1, characterized in that radial hazards are made on the worm shaft from the side of the disk and on the surface of the disk from the side of the worm shaft.