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Each screw is meticulously crafted using advanced CNC technology and undergoes rigorous quality control to ensure unparalleled precision.

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Parallel Twin Screw

Parallel Twin Screw

Parallel twin screws enable
high-performance mixing
and extrusion in plastics.

  • Material: Bimetallic Nitrided Steel
  • Tolerances: ±0.01mm
CUSTOM AVAILABLE
Rubber & Plastic Twin Screw

Single Screw

Single screw provides simple,
continuous melting and
conveying for plastics.

  • Material: Bimetallic Nitrided Premium Steel
  • Tolerance:±0.001mm
CUSTOM AVAILABLE
PS Foaming Twin Screw

Conical Twin Screw Barrel

Conical twin screw barrel
provides high mixing
efficiency and torque.

  • Material: High-Speed Tool Steel
  • Tolerance:±0.0005mm
CUSTOM AVAILABLE
PVC Pipe Screw Barrel

Injection Molding Screw

Injection screw melts plastic
and injects into the
mold precisely.

  • Material:Nitrided SteeI + Bimetallic
  • Tolerance: ±0.001mm

Our Products

Apply Various Plastics In Production

Our barrel and screw components enhance efficiency for your production

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GRANULATION

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WOOD-PLASTIC COMPOSITE

Product Application

PVC PRODUCTS

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PLASTIC PIPE

Product Application

FILM BLOWING

Product Application

INJECTION MOLDED PRODUCTS

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We serve the entire plastic production industry. Contact our engineering team to discuss your specific application requirements and discover how our precision screws can elevate your manufacturing processes.

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+86-13505809642

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Block C,No.2 West Section,Xingzhou Avenue,Dinghai District ,Zhoushan City,Zhejiang Province

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About Us
Zhoushan Nanhaiya Plastic Machinery Co., Ltd.
ABOUT OUR COMPANY

Global Premium Screw Solutions

Built on Excellence

Zhoushan Nanhaiya Plastic Machinery Co., Ltd., one of the earliest professional manufacturers in China to delve into the precision screw and barrel market, has been dedicated to the R&D and manufacturing of this niche market since its establishment.

Leveraging its extensive technical expertise, advanced production processes, and intelligent equipment, the company has integrated over a decade of experience in screw and barrel manufacturing and actively introduced cutting-edge European and American technologies and techniques. This has enabled the company to establish a comprehensive system from core technology R&D to full-line product production. This encompasses custom screw design, alloy spray welding, and full-scale product manufacturing, including single screws, conical twin screws, and parallel twin screws. The company also offers specialized screw and barrel solutions for specialized applications such as PE wood-plastic composites,WPC, PVC, EVA, TPR, TR, and aluminum-plastic composite panels.

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Block C,No.2 West Section,Xingzhou Avenue,Dinghai District ,Zhoushan City,Zhejiang Province

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Latest From The Blog
Distributive vs Dispersive Mixing: Screw Design and Configuration for Twin-Screw Extrusion

Distributive vs Dispersive Mixing: Screw Design and Configuration for Twin-Screw Extrusion

  • Distributive mixing spreads components through the melt; dispersive mixing breaks agglomerates or reduces the size of a dispersed phase. A twin-screw configuration often needs both, but the balance should follow the defect and formulation rather than a preference for higher shear. First identify the problem, then compare mixing quality within the line's thermal and mechanical limits.
Conical Twin Screw Extruder vs Parallel Twin Screw Extruder for PVC

Conical Twin Screw Extruder vs Parallel Twin Screw Extruder for PVC

  • Choose a conical twin screw extruder or a parallel twin screw extruder by the PVC formulation, required production window and machine configuration, not the geometry label alone. Compare equivalent process duties, then check accepted output, product quality, energy use and mechanical compatibility. For an existing line, decide whether you need replacement parts or a different machine architecture before requesting a quotation.
Extruder Screw Pitch and Lead: How They Affect Conveying, Pressure and Melt Quality

Extruder Screw Pitch and Lead: How They Affect Conveying, Pressure and Melt Quality

  • Extruder screw pitch is the axial spacing between adjacent flights; lead is the axial advance of the same helix through one complete turn. They are equal on a regular single-start section, but not on every screw. Choose a lead change by its effect on feeding, melting and pressure delivery, rather than assuming that wider spacing guarantees more good output.
Extruder Screw Channel Depth: How It Affects Output, Pressure and Melt Temperature

Extruder Screw Channel Depth: How It Affects Output, Pressure and Melt Temperature

  • Extruder screw channel depth describes the space between the screw root and a defined outer reference. A deeper channel provides more space, but it does not automatically deliver more good output against die resistance. Choose the profile by its feeding, melting and pumping duties, with the actual dimensions, material and matching barrel defined.
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