Single-screw extrusion cavity with good mixing effect

Abstract

The invention discloses a single-screw extrusion cavity with a high mixing effect. The extrusion cavity comprises an extrusion rod combined by different screw threads, a seal cavity shell body, a cooling cavity shell body, an extrusion port close plate and a material guiding baffle plate; the seal cavity shell body is internally provided with a cylindrical seal cavity, and the inner side of the seal cavity shell body is provided with four groups of pin structures; the screw-thread extrusion rod is provided with two extrusion screw threads formed by combining different shapes; the outlet end of the seal cavity shell body is provided with the extrusion port close plate; the diameter of an extrusion port of the extrusion port close plate is 1.1-1.3 cm. Through shrinking the pore diameter of an extrusion port of a cavity body of a conventional commonly-used single-screw extruder, the pressure between the extrusion cavity internal screw-thread extrusion rod and mixed materials is improved, and at the same time, with cooperation of the multiple groups of pin structures inside an extrusion cavity, uniform stress between different materials at positions in the extruder seal cavity is ensured, and the mixing effect of whole powder coating raw materials is improved; and a produced product is high in density and high in glossiness, the materials are convenient to discharge by the intermittent extrusion screw threads, and large-scale continuity production of enterprises is convenient.

Description

technical field [0001] The invention relates to the field of powder coating production equipment, in particular to a single-screw extrusion chamber for improving the mixing effect of a single-screw extruder. Background technique [0002] The single-screw extruder is mainly used to extrude thermoplastics such as soft and hard polyvinyl chloride and polyethylene, and can process a variety of plastic products, such as blown film, extruded tube, press plate, ribbon, etc., and can also be used for melt granulation. The plastic extruder has advanced design, high quality, good plasticization, low energy consumption, and adopts involute gear transmission, which has the characteristics of low noise, stable operation, large bearing capacity and long service life. [0003] At present, the diameter of the extrusion port of the single-screw extruder on the market is generally 2cm. Due to the large radial area of ​​the exit, the raw materials of the powder coating are under less force in ...

AI Technical Summary

Problems solved by technology

[0003] At present, the diameter of the extrusion port of the single-screw extruder on the market is generally 2cm. Due to the large radial area of ​​the exit, the raw materials of the powder coating are under less force in the cavity of the extruder and the residence time is shorter, which leads to This means that the raw materials cannot achieve a good mixing effect in the extrusion chamber of the extruder; at the same time, due to the particularity of the threaded extrusion rod structure in the extrusion chamber, although the contact area between the continuous extrusion thread and the raw material is large, the Its discharge efficiency is relatively low, and it is difficult to carry out continuous material operation in the actual production process.

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