Screw and Cylinder for Injection Molding Machine

The screw and cylinder constitute the core component set of plastic and rubber processing equipment (including extrusion and injection molding machines), developed by Zhejiang Zhongyang Screw Manufacturing Co., Ltd. Working synergistically, they fulfill key processes such as conveying, melting, plasticizing, homogenizing, and forming raw materials. With advanced material technology, precision manufacturing, and customizable designs, this component set is essential for ensuring processing efficiency, product quality, and operational stability, widely serving global plastic and rubber processing industries.

High-Quality Materials & Advanced Craftsmanship: Crafted from high-performance alloy steels such as 38CrMoAlA (SACM645), 31CrMoV9 (1.8519), and 4Cr5MoSiV1 (SKD61, H13). Key surface treatments include nitriding (hardness HV850-1000, nitriding depth 0.5-0.8mm) for enhanced wear and corrosion resistance. Bimetallic versions adopt advanced technologies like PTA plasma welding, HVOF supersonic thermal spraying (with up to 88% tungsten carbide content in the coating), and centrifugal casting, forming a dense alloy layer (2-3mm for screws, 1.5-2.5mm for cylinders) that doubles service life compared to conventional products.

Diverse Types & Customizable Specifications:

Types: Cover single screw & cylinder (extrusion/injection), conical twin screw & cylinder, parallel twin screw & cylinder, bimetallic screw & cylinder, planetary screw & cylinder, and rubber machine screw & cylinder, catering to different processing scenarios.

Customization: Screw diameter ranges from 15mm to 800mm, length-diameter ratio (L/D) from 12 to 55, and compression ratio can be tailored to product formulas and material properties. Screw structures include gradient, barrier, venting, mixing, and multi-flight types to adapt to varying material characteristics.

Precision Manufacturing & Stable Performance: Undergoes rigorous precision processing, with surface roughness reaching Ra 0.4μm and straightness controlled within 0.015mm/m, ensuring a tight fit between the screw and cylinder to minimize material residue. Equipped with fully automated heat treatment workshops (including 11.5m deep nitriding furnaces) and metallurgical laboratories, full-process quality inspection guarantees consistent performance during long-term high-load operation.

Reliable Quality Assurance: Certified by ISO9001:2015 and China Classification Society Quality Certificate, with a rigorous quality control system covering raw material testing, processing, heat treatment, and final inspection. Backed by over 40 patents and recognition as a "High-Tech Enterprise," the product meets international standards and has earned trust from global partners like Krauss Maffei China.