RU156859U1 - EXTRUDER FOR PROCESSING SECONDARY POLYMERS - Google Patents

Abstract

An extruder for the processing of secondary polymers, including a body made in the form of a prefabricated structure, consisting of a feed zone, a compression zone, a dosing zone, a gripping device, a screw made in the form of a prefabricated structure, consisting in the compression zone of a barrier section and a decompression section, in the zone dispensing is made of conical and cylindrical sections arranged in series, characterized in that in the feeding zone the inner walls of the housing are ribbed in the form of a six-way mixing stage with six slotted mixing turns, and the geometry of the turns is made intermittently.

Description

The technical solution relates to the field of processing of polymeric materials by pressure and can be used in the processing of polymeric waste with obtaining 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 of conical and cylindrical sections arranged in series, [patent UA 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.

Known extruder for processing thermoplastics (FISHER E. and others, Extrusion of plastics, Moscow, Chemistry, 1970, p. 88-108), comprising a housing having a feed zone, a compression zone, a metering zone, a gripping tool, a screw made prefabricated, in the feed zone, the screw is made in the form of a conical section, the metering zone screw is made of a conical and cylindrical section.

A disadvantage of the known extruder is the insufficient quality of the products obtained.

The task of the technical solution is to improve the extruder by changing the design of the housing in the power zone.

The essence of the technical solution: An extruder for processing secondary polymers, comprising a prefabricated housing, consisting of a feed zone, a compression zone, a dosing zone, a gripping device, a screw made a prefabricated, consisting of a barrier section and a decompression section in the compression zone, in the dosing zone of conical and cylindrical sections arranged in series, moreover, in the supply zone, the housing is made in the form of a six-way mixing stage with six grooved mixing turns, the geometry of these turns in is 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 made in the form of a prefabricated structure, a gripping device 2, a screw 3 made in the form of a prefabricated structure. The casing consists of a feeding zone 4, a compression zone 5, a dosing zone 6. In the feeding zone 4, the inner walls of the casing are ribbed in the form of a six-way mixing stage with six grooved mixing turns 7. In the compression zone 5, the screw consists of a barrier section 8 and a decompression section 9. In the metering zone 6, 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 7 with six grooved mixing turns 12, the geometry of which is interrupted then.

The extruder for the processing of secondary polymers 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 a six-way mixing stage of the housing 7 with six grooved mixing turns 12, then in the channel of the barrier section 8 of the compression zone 5, the polymer mixture is completely melted, creating a melt with a uniform throughout temperature, due to the use of the barrier section 8, in the decompression section 9 of the compression zone 5, volatile compounds contained in the waste are removed through the use of a structure with a partially filled flow channel and a ventilation hole in the housing 1, conical 10 and cylindrical 11 sections dosage zones 6 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 secondary polymers, including a housing made in the form of a prefabricated structure, consisting of a feed zone, a compression zone, a dosing zone, a gripping device, a screw made in the form of a prefabricated structure, consisting in a compression zone of a barrier section and a decompression section, in the zone dosing is made of conical and cylindrical sections arranged in series, characterized in that in the feed zone the inner walls of the housing are ribbed in the form of a six-way mixing stage with six GOVERNMENTAL mixing coils, wherein the coils formed intermittently geometry.

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