A high-efficiency mixing conical twin screw

By improving the thread design and structure of the tapered screw, the mixing and shearing capabilities are enhanced, solving the problem of poor mixing effect in the existing twin-screw structure, and achieving efficient plasticizing and high-speed production.

CN224335008UActive Publication Date: 2026-06-09SUZHOU JWELL PRECISION MACHINERY
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Utility models(China)
Current Assignee / Owner
SUZHOU JWELL PRECISION MACHINERY
Filing Date
2025-07-03
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

The existing twin-screw structure has a weak mixing and shearing effect, resulting in poor dispersion of modified and highly filled materials, poor plasticization, and many defects in the appearance and performance of the products, which cannot meet product requirements.

Method used

It employs a pair of conical screws rotating in opposite directions, with a multi-start thread design. Combined with staggered mixing units and irregularly shaped kneading blocks, it enhances mixing and shearing capabilities. The thread gap can be adjusted as needed to optimize material conveying and venting.

Benefits of technology

It improves the mixing and plasticizing ability of materials, enhances melting efficiency and product quality, and is suitable for high-speed production and extrusion of highly filled formulations.

✦ Generated by Eureka AI based on patent content.

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Abstract

This application discloses a high-efficiency mixing conical twin-screw extruder, comprising a pair of meshing conical screws rotating in opposite directions. Each conical screw includes a shaft and a thread extending helically from front to back along the shaft's axial direction. The shaft comprises, from front to back, a feeding section, a mixing section, a plasticizing section, a venting section, a conveying section, and a metering section. The thread includes a first threaded edge arranged in the feeding section, a second and third threaded edges arranged in the plasticizing section, a fourth threaded edge arranged in the venting section, a fifth threaded edge arranged in the conveying section, and a sixth threaded edge arranged in the metering section. The mixing section has several mixing groups arranged from front to back, each mixing group including several mixing spikes spaced apart circumferentially along the shaft. The plasticizing section also has several irregularly shaped kneading blocks located between the second and third threaded edges. This application improves the structure of the conical screw, enhancing its mixing, shearing, and plasticizing capabilities, ensuring plasticizing effect while meeting high-speed production requirements.
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