RU154542U1 - THERMOPLAST PROCESSING EXTRUDER - Google Patents

Abstract

An extruder for processing thermoplastics, including a housing consisting of a feed zone, a compression zone, a metering zone, a gripping device, a screw made prefabricated, and consisting of a barrier section and a decompression section in the compression zone, in the metering zone made of conical and cylindrical sections arranged in series characterized in that in the feed zone the screw is made in the form of a six-way mixing stage with two continuous wiping coils and four grooved mixing coils, the geometry of the main winding and a double-threaded, and more are intermittently.

Description

The technical solution relates to the field of processing of polymeric materials by pressure and can be used in the processing of polymer waste to produce high-quality products.

A known extruder for processing thermoplastics, selected as a prototype, which contains a housing consisting of a supply zone, a compression zone, a metering zone, a gripper and a screw made prefabricated, and in the supply zone is made conical, in the compression zone consists of a barrier section and section decompression, and in the metering zone the screw is made up of conical 10 and cylindrical sections 11 located in series. [UA Patent No. 5779, publ. March 15, 2005, Bull. Number 3].

A disadvantage of the known design is that in the case of the processing of polymeric materials consisting of secondary, primary raw materials, dyes and other components necessary for secondary polymeric materials (secondary polymer mixture), a set of expensive equipment is necessary for preliminary preparation of the initial raw materials (mixers, plasticizers, granulators ) The use of directly unprepared preliminary raw materials for the known design does not give good quality of the resulting secondary products due to insufficient mixing abilities of the design.

The objective of the technical solution is to improve the extruder by changing the design of the screw in the feed zone.

The essence of the technical solution: An extruder for processing thermoplastics, comprising a housing consisting of a feed zone, a compression zone, a metering zone, a gripper, an auger made prefabricated, and consisting in a compression zone of a barrier section and a decompression section, in a metering zone made of sequential conical and cylindrical sections, moreover, in the feed zone the screw is made in the form of a six-way mixing stage with two continuous wiping coils and four chipped mixing coils, with a geometer The main loop is two-way, and the additional ones are intermittent.

The use of the claimed extruder in the processing of combined secondary mixtures allows you to combine preparatory operations (filling, mixing, granulation) and the operation of obtaining new high-quality products by extrusion.

The device (Fig. 1) contains a housing 1, a gripping device 2, a screw 3, made in the form of a prefabricated structure. The casing consists of a feeding zone, a compression zone, a dosing zone. In the feeding zone 4, the auger is made in the form of a six-way mixing stage with two continuous wiping coils and four grooved mixing coils 5. In the compression zone 6, the auger consists of a barrier section 7 and a decompression section 8 In the dispensing zone 9, the auger is made up of conical 10 and cylindrical sections 11 located in series. Fig. 2 shows a view of a six-way mixing stage 5 with two continuous turns of wiping 12 and four cut turns of cm Shivani 13, the geometry of the primary coil 12 is a bifilar and coils 13 are intermittently.

The extruder for processing thermoplastics works as follows.

Various polymeric materials (primary, secondary, dyes and other fillers) are fed into the housing 1 by separate dispensers in a gripping device 2, captured by a screw 3, which rotates, and are transported in solid form, uniformly mixed and compacted in the channel of the supply zone 4, due to the use of six-way mixing stage 5 with two continuous turns of rubbing 12 and four chipped mixing turns 13, then in the channel of the barrier section 7 of the compression zone 6, the polymer mixture is completely melted, the melt with a temperature uniform throughout the volume, due to the use of the barrier section 7, in the decompression section 8 of the compression zone 6, the volatile compounds contained in the waste are removed through the use of a design with a partially filled flow channel and a ventilation hole in the housing 1, conical 10 and cylindrical 11 sections of the metering zone 9 determine the magnitude and stability of the pressure and productivity that the extruder develops.

The use of the claimed extruder in the processing of combined secondary mixtures allows you to combine preparatory operations (filling, mixing, granulation) and the operation of obtaining new high-quality products by extrusion.

Claims (1)

An extruder for processing thermoplastics, including a housing consisting of a feed zone, a compression zone, a metering zone, a gripping device, a screw made prefabricated, and consisting of a barrier section and a decompression section in the compression zone, in the metering zone made of conical and cylindrical sections arranged in series characterized in that in the feed zone the screw is made in the form of a six-way mixing stage with two continuous wiping coils and four grooved mixing coils, the geometry of the main winding and a double-threaded, and more are intermittently.

Images