SU1705096A1 - Screw machine for reprocessing high-viscosity polymeric materials - Google Patents

Abstract

The invention relates to equipment for the processing of polymeric materials. used in rubber and tire industries. The purpose of the invention is to improve the quality of mixing of the processed material, this in the pin, mixing zone of the cylinder on the core of the screw between the gaps in its cutting made additional mixing elements. The elements can be made in the form of partitions of the worm channel or eccentric screw cuts. It is also possible to perform mixing elements with additional gaps with the placement of these elements at a length greater than the distance between adjacent gaps in the cutting of the screw. At the height of the rubber mixture, loaded into the cylinder, is fed into the pin mixing zone. In this zone, the mixture is exposed to pins and additional mixing elements. Due to the presence of these elements, the mixture is subjected to intense shear deformations by pushing the mixture through the gaps between the elements and the cylinder. This contributes to the transformation of a highly viscous mixture into a uniform, uniformly plasticized mass. Зз.п. f-ly, 2 ill. Q IS --- i

Description

The invention relates to equipment for the processing of polymeric materials and moss; it can be used in the rubber and tire industries.

The aim of the invention is to improve the mixing quality of the processed material by improving its homogenization and kneading.

In Fig. 1, a machine is depicted in the mixing zone with mixing elements made in the form of partitions and eccentric cuts, a common seed, in Fig. 2, the embodiment is

machines with mixing elements with additional breaks.

The screw-driver contains a material cylinder 1 with loading and unloading openings (not shown), in which the screw-to-2 is coaxially mounted with the possibility of rotation with a screw conveying thread 3, made with breaks k. The pins 5 are installed on the inner surface of cylinder 1 in the mixing zone in the planes perpenlicular to the axis of rotation of the black. The pins 5 are installed with the possibility of placing in the gaps of the cut 3. On the sergand

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In the spaces between the breaks k, the mixing elements are made in the form of partitions 6 of the transport channel or of screw-eccentric cuts 7. The partitions 6 are made with a height less than the height of the transporting cut 3. It is also possible to make mixing elements 8 with additional breaks 9, while the mixing elements 8 are placed at a length greater than the distance between adjacent breaks A of cutting 3 (for example, at a length of two or more cutting steps 3).

Chervna machine works as follows.

The high-volume rubber mixture, loaded into the material cylinder 1 through the loading opening, is caught by the cutting turns 3 of the screw 2 and is fed into the mixing zone with the pins 5. In this area, the mixture is exposed to the pins 5. Those lumps of high-viscosity rubber mixture that have not been exposed pins 5 and remained insufficiently plated and homogenized7 while moving along the channel between the transporting turns of the 3 worm cutting, intensively moved and homogenized by additional mixing elements 6, 7, or 8, pushing through 1s between them and the inner surface of cylinder 1 and undergoing intense shear deformations. In this case, the high-viscosity mixture is transformed into a uniform, uniformly placable mass. avoids the need to install the mixing zone after the pin mixing zone, which entails an elongation of the screw and cylinder, and, consequently, increases the drive power of the machine.

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Thus, the use of additional mixing elements in the pin mixing zone improves the mixing quality of the processed highly viscous rubber mixtures by improving the properties of homogenization and kneading of this zone,

Claims (3)

1. Worm machine for processing highly viscous polymeric materials containing coaxially mounted worms k to the material cylinder rotatably to, made with gaps in the transporting thread, and pins mounted on the inner surface of the cylinder in the mixing zone in planes perpendicular to the axis of rotation screw with the possibility of placement in the breaks of cutting the screw, characterized in that, in order to improve the quality of mixing of the processed material by improving its homogenization and kneading, mixing elements are made on the core of the worm between the gaps. 2. Machine pop.1, which differs in the fact that the mixing elements are made in the form of partitions of the transport channel of the screw with a height less than the height of the transporting thread. 3. Machine pop.1, characterized by the fact that the mixing elements are made in the form of helical eccentric cuts. A. Machine as in claim 1, characterized in that the mixing elements are made with additional gaps and are placed at a length greater than the distance between the adjacent worm cutting bits. fig 1 FIG. 2