Introduction to Conical Twin Screw

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Conical twin-screw is different from parallel twin-screw in appearance. The diameters of its two ends are different. The diameter of the feeding section is large, while the diameter of the homogenizing section is small. The middle is gradually transitional. Conical twin-screw is meshed, and most of them rotate in opposite directions. Two conical screws mesh and rotate in opposite directions in the barrel. There is a reasonable gap between the top of the screw rib of one screw and the root of the other screw. Due to the opposite rotation, the way of the material screw on one screw is blocked by the other screw, and the material can only move forward axially through the gap of each part under the push of the screw.

When the material passes through the radial gap between the two screws, it is like passing through the gap between the two rolls. The stirring and shearing are very strong. Therefore, the plasticization of materials is very uniform, which is particularly suitable for processing PVC plastics. The compression ratio of conical twin-screw is not only formed by the deep to shallow screw grooves, but also by the large to small outer diameter of the screw, so the compression ratio is quite large. Therefore, the materials are plasticized more fully and evenly in the barrel, ensuring the quality of the products. In this way, on the premise of ensuring the quality, the rotational speed of the extruder can be increased, so as to improve the production capacity of the extruder.

Scope of application: PVC wood plastic, PE wood plastic, ultra-high molecular board, unburned brick pallet, soft PVC sheet, PVC foam board and other ordinary plastics, PP, PE, ABS, PVC, raw material granulation, production pipes, profiles, sheets, etc.

Our company is a professional manufacturer of rubber, plastic machinery, extrusion machinery barrel screw and accessories from design, research and development, production, heat treatment and sales. The company has rich experience in the industry, and knows that the glue melting barrel and screw accessories play an important role in rubber and plastic machinery, so we do our best to achieve “zero defect” in the process of development, production and quality inspection.