Nitrided & Bimetallic Screws

Screws

An optimal extrusion process depends on the extruder screw design, and the quality of manufacturing the screw. It cannot be overstated that the screw design and quality is critical to your success. Our designers, engineers and machinists understand what it takes to design and manufacture extrusion screws that perform best for our customers. We manufactures barrier screws, mixing screws, general purpose screws, volume reduction screws, and more.

Selecting the right extrusion screw design

Selecting the right screw design for your process is critically important to optimizing melt conditions and maximizing your material properties. Plastic materials have broad variations in viscosity, melting points, volatiles, densities, moisture, sensitivity to shear, abrasive contaminants, etc. All of these variables, alone or in combination present significant barriers to maintaining homogeneity and melt consistency and 1output.
We can help you choose the optimal extrusion screw design for your process. From single-stage general purpose to two-stage barrier designs to double vented and with a host of mixer technologies and wear-resistant alloys, we have what you need to maximize your process. We have everything from low work to high work screw designs that work to keep your resins in proper condition.

We offer various coatings for all screws: Chrome-plating, chemical nickel-plating, TiN-coating, CrN-coating, high speed-flame spraying.



Services

Feed Screws

Custom design feed screws

  • Harnesses our expertise to solve problems and help develop new products / processes. These screws are specifically designed to the customers process.
  • We have a full laboratory for screw evaluation and would be pleased to work with you and your process.

General feed screws

  • Uncomplicated designs for Nylon, PVC, high temp and GP profiles. These are typically designs that are process proven.

Customer supplied feed screws

  • Feed screws manufactured to your design and supplied drawing.

Feed screw modifications

  • Special tips, end-caps and die adapters.

Materials & Surface Treatment

  • Nitrided Steel for high wear resistance and long service life
  • Bimetallic Alloy for extreme abrasion and corrosion resistance
  • Tool Steel Options for heavy-duty applications
  • Surface treatments: nitriding, hard-chrome plating, and specialized coatings

Advantages

  • Outstanding wear and corrosion resistance
  • High-performance mixing and melting
  • Long operational lifespan with minimal maintenance
  • Tailored solutions for specific materials and processes

Applications

  • PVC, PE, PP, ABS, and engineering plastics
  • Profile, pipe, sheet, and film extrusion
  • Compounding and pelletizing
  • Masterbatch production
  • Recycled plastics processing

Design Options

  • Customized screw geometry and compression ratios
  • Variable pitch lengths for optimized throughput
  • Advanced mixing section designs for better homogenization
  • Precision machining for perfect meshing and high output

Quality Assurance

  • Dimensional accuracy checks
  • Hardness and metallurgical testing
  • Surface finish inspections
  • Concentricity verification for smooth operation
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