RU164876U1 - EXTRUDER FOR PROCESSING FINE-BUILDING AND POLYMERIC MATERIALS - Google Patents

Abstract

An extruder for the processing of finely dispersed building and polymeric materials, including a housing consisting of a feed zone, a compression zone, a metering zone, a gripping device, an auger made prefabricated, in the feed zone the auger is made in the form of a conical section, in the metering zone the auger is made of two sequentially arranged conical and cylindrical sections, characterized in that the screw in the compression zone contains four blades placed across the screw, and the blade of each coil is offset from the previous 90 degrees, and about azuyuschie input channel, output channel, the small and large loop vane gap.

Description

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

Known extruder for processing thermoplastics (patent UA No. 5779, publ. March 15, 2005, Bull. No. 3), selected as a prototype. The extruder comprises a housing, a gripping device, an auger, a feed zone, a compression zone, which consists of a barrier section and a decompression section, a metering zone made of successive conical and cylindrical sections.

A disadvantage of the known design is that in the case of processing building and polymeric materials consisting of secondary, primary raw materials, fillers, dyes and other components necessary for secondary building and polymeric materials (secondary polymer-building mix) a set of expensive equipment is necessary for preliminary preparation feedstock (mixers, presses, 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 due to the new design of the screw in the compression zone.

The essence of the technical solution: an extruder for the processing of finely divided building and polymeric materials, including a housing consisting of a feed zone, a compression zone, a metering zone, a gripping device, a screw made prefabricated, in the feed zone the screw is made in the form of a conical section, in the metering zone, the screw made of two conical and cylindrical sections in series, and the screw in the compression zone is made in the form of a barrier section and a four-way mixing section with four mixing blades, and the blade to zhdogo coil shifted relative to the previous one by 90 degrees and the blade geometry in the coil along the coil is short and long transverse coil.

The difference between the claimed device is the new design of the screw in the compression zone in the form of a barrier section and a four-way mixing section with four mixing blades, the blade of each coil being offset 90 degrees from the previous one and the blade geometry in the turn is short along the turn and long across the turn

The use of the claimed extruder in the processing of finely divided secondary mixtures allows you to combine preparatory operations (filling, pressing, mixing, granulating) and the operation of obtaining new high-quality products by extrusion during the processing of a multicomponent mixture.

In FIG. 1 shows a general view of an extruder for processing finely dispersed building and polymeric materials.

In FIG. 2 shows a part of the screw located in the compression zone.

The extruder for processing finely dispersed building and polymeric materials (Fig. 1) contains a housing 1, a gripping device 2, a screw 3, made in the form of a prefabricated structure. The housing consists of a feed zone 4, a compression zone 5, a metering zone 6. In the feed zone 4, the screw is made in the form of a conical section, in a compression zone 5 the screw consists of a barrier section 7 and a mixing section of a multicomponent building and polymer mixture 8. In the metering zone 6 , the screw 3 is made of two consecutive parts: from a conical 9 and a cylindrical section 10. On (Fig. 2) is a part of the screw located in the compression zone 5, containing blades 11 placed across the screw 12, while the material passes from the input channel 13 to the output channel 14 h a small gap 15 of the blade coil and a large gap 16 of the blade coil. The size of the gaps of the blade turn depends on the diameter of the screw 3 and should be 4-5% of the diameter for a small gap of the blade turn and 18-20% of the diameter for the large gap of the blade turn, which will ensure optimal mixing quality. With a lower ratio, the melt will not be able to uniformly move along the extruder, and with a larger ratio, a uniform dispersing mixing effect on the melt will not be provided.

An extruder for processing finely divided building and polymeric materials works as follows (Fig. 1).

Various finely dispersed building and polymeric materials (primary, secondary, dyes and other fillers) are supplied by separate dispensers to the gripper 2, captured by a screw 3, which rotates in the housing 1, are transported in solid form, and compacted in the supply zone 4, then in the compression zone 5, in the barrier section 7, the construction mixture is moved and the polymer mixture is completely melted, the mixture is created with a temperature uniform throughout the volume, in the mixing section of the multicomponent fine builder Foot and polymer melt 8 compression zone 5 occurs uniformly dispersing mixing action, by the use of designs with quadrifilar mixing section with four mixing vanes 9 and conical section 10 cylindrical zone 6 of dosing and pressure determine the amount of stability and performance, which develops extruder.

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

Claims (1)

An extruder for the processing of finely dispersed building and polymeric materials, including a housing consisting of a feed zone, a compression zone, a metering zone, a gripping device, an auger made prefabricated, in the feed zone the auger is made in the form of a conical section, in the metering zone the auger is made of two sequentially arranged conical and cylindrical sections, characterized in that the screw in the compression zone contains four blades placed across the screw, and the blade of each coil is offset from the previous 90 degrees, and about azuyuschie input channel, output channel, the small and large loop vane gap.

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