RU163853U1 - EXTRUDER FOR PROCESSING BUILDING AND POLYMERIC MATERIALS - Google Patents

Abstract

An extruder for processing 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, and consisting of a barrier section and a decompression section in the compression zone, in the metering zone made of conically arranged and a cylindrical section, characterized in that in the feed zone the screw is made in the form of a six-way mixing stage with six intermittent mixing coils made with a thickness of the coil increasing from enshego to more turns.

Description

The technical solution relates to the field of processing building and polymer materials by pressure and can be used in the processing of building and 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 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 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, plasticizers, granulators, press). 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, to ensure the receipt of new materials by extrusion.

The essence of the technical solution: An extruder for processing building and polymeric materials, including a housing consisting of a feed zone, a compression zone, a dosing zone, a gripper, an auger made prefabricated, and consisting in a compression zone of a barrier section and a decompression section, in the dosing zone of conical and cylindrical sections arranged in series, moreover, in the feed zone, the screw is made in the form of a six-way mixing stage with six intermittent mixing turns, made with a turn thickness Chiva from smaller to larger coil.

Distinctive features of the claimed solution is the implementation of the screw in the feed zone in the form of a six-way mixing stage with six intermittent mixing turns, and the thickness of the coil increases from a smaller to a larger coil.

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

In FIG. 1 shows an extruder.

Figure 2 schematically shows a screw with turns.

The device (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 six-way mixing stage 7 with six intermittent mixing turns. In the compression zone 5, the screw consists of a barrier section 8 and a decompression section 9. In the metering zone 6, the screw is made up of conical 10 and cylindrical sections 11 located in series. Fig. 2 shows a six-way mixing stage 7 with six intermittent mixing turns 12 , which have an increasing thickness of the coil from the smallest to the largest by 20%, which is optimal for high-quality mixing of dissimilar secondary building and polymeric materials. The number of turns of the mixing stage can be from 4 to 9. When the number is less than 4, the mixing of a multicomponent polymer-polymer melt occurs poorly, and with an increase in the mixing steps more than 10, the channels of the mixing coil become too small to move the secondary building material along the channel. The value of the thickness of the coil depends on the length of the mixing stage 5 and should be 1-4% of its length, which will ensure optimal quality of mixing. With a lower ratio, the melt will not be homogeneous, and with a larger ratio, the melt will not be able to move along the extruder.

The extruder for processing building and polymeric materials works as follows.

Various finely dispersed building and polymeric materials (primary, secondary, dyes and other fillers) are fed into the housing 1 by separate dispensers into a gripper 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 with six intermittent turns of mixing 12, then in the channel of the barrier section 8 of the compression zone 5, the polymer-polymer mixture is completely melted, creating mass with a temperature uniform throughout the volume, due to the use of the barrier section 8, in the decompression section 9 of the compression zone 5, 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 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 construction-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 processing 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, and consisting of a barrier section and a decompression section in the compression zone, in the metering zone made of conically arranged and a cylindrical section, characterized in that in the feed zone the auger is made in the form of a six-way mixing stage with six intermittent mixing turns made with a turn thickness increasing from enshego to more turns.

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