Import Barrier Screw For Plastic Extrusion Mach — Buy in wholesale FOB from Supplier in China

Zhejiang Jiayue Machinery Manufacturing Co., Ltd. produces barrier screws for plastic extrusion machines with diameters from 20 mm to 300 mm. The base steel undergoes heat treatment followed by high-frequency quenching to achieve a hardness of HB 240-280. A bimetallic wear-resistant layer is applied to a depth of 0.8-1.2 mm, with a surface hardness of HRC 58-60. Screw linearity is controlled to 0.015 mm per metre, a tight tolerance that minimis eccentric wear and maintains stable output across long production runs.

The barrier screw design incorporates a secondary flight or mixing section that separates molten polymer from unmelted solids, improving melting efficiency and reducing thermal degradation in heat-sensitive resins. The bimetallic coating, typically a nickel-based alloy with tungsten carbide particles, extends service life in abrasive filled compounds, glass-fibre reinforced polymers and halogenated formulations. The hardness differential between the substrate (HB 240-280, approximately HRC 23-27) and the wear layer (HRC 58-60) provides toughness beneath a hard working surface, reducing catastrophic failure risk under torque spikes or foreign-object intrusion.

These screws suit single-screw extruders processing PVC pipe and profile, PE film and sheet, PP strapping, ABS sheet and engineering polymer compounds. Target buyers include extrusion line operators, OEM machine builders, aftermarket spare parts distributors and compounders running high-wear formulations. The supplier offers dimensional customisation within the 20-300 mm range, though specific alloy composition, conveying geometry, compression ratio, L/D ratio and delivery schedules must be confirmed directly with Zhejiang Jiayue.

Zhejiang Jiayue Machinery Manufacturing Co., Ltd. is located at No.7 Changxin Road, Yancang Subdistrict, Zhoushan, Zhejiang Province, 316041, China. Zhoushan is recognised as China's primary cluster for screw and barrel manufacture, with dense supplier networks for speciality steels, hard-facing alloys and precision grinding services. The company holds a Harbor trust tier, but records a 0.00% response rate and 0-hour average response time, signalling minimal or no platform-based engagement. Buyers should initiate direct contact via telephone or on-site visit given this communication gap.

The listing describes a focused product range around heat-treated and bimetallic-coated extrusion screws, without mention of barrel manufacturing, complete extruder assembly, or downstream equipment such as dies or haul-offs. No ISO 9001, quality management certification, or export licence details are provided. Annual turnover, factory floor area, CNC grinding machine count and installed customer base are absent from the profile and should be verified during supplier audit. The company's proximity to Zhoushan Port (approximately 10 km) offers logistical advantages for heavy freight shipment.