Haihe Machinery

Diameter: φ15mm – φ500mm
Maximum Length: ≤ 10,000mm

Pin-type cold-feed screw & barrel systems feature pins installed at specific positions in the barrel, which are inserted into the screw to enhance rubber mixing and plasticization, increase extrusion output, and improve the surface gloss and air-tightness of extruded profiles.

Diameter: Φ15 – Φ350 mm
Maximum Length: ≤ 10,000 mm
Surface Treatment: Nitriding, hardness HV ≥ 900
Nitriding Depth: 0.5 – 0.8 mm
Material: Surface WC/Co full overlay welding, effectively extending screw service life

Features:
High wear resistance and durability
Optimized for pelletizing...

Screw Base Material: Dual-alloy 38CrMoAlA
Barrel Base Materials: 40Cr, 42CrMo, 38CrMoAlA

Alloy Composition Options:
Wear-Resistant: Fe + Ni + Cr + B
Corrosion-Resistant: Ni + Cr + Co + B
High Wear & Corrosion Resistance: Ni + Cr + WC + Co + B

Vented cold-feed screw & barrel systems are designed to remove moisture, air, and low-molecular volatiles from the rubber compound. By vacuum venting, the extruded products are bubble-free with high cross-sectional density, making them especially suitable for compounds containing recycled rubber or ...

Process: Nitriding & Bimetal
Nitriding Layer Depth: 0.5 – 0.7 mm
Bimetal Screw Hardness: HRC > 60
Nitrided Layer Hardness: HV 960 – 1100
Screw Straightness: 0.015 mm
Chromium-Plated Screws: Chrome layer thickness 0.03 – 0.06 mm
Surface Finish: Ra 0.04 – 0.08 μm
Nitriding Brittleness: ≤ Grade 2
L/D...

Diameter: Φ20 – Φ300 mm
L/D Ratio: 1:18 – 1:55
Material: High-quality 38CrMoAlA nitriding steel, nitriding hardness HV 850 – 1000, nitriding layer depth 0.5 – 0.7 mm.
Optional Bimetal: Can be selected per customer requirements, alloy layer depth 1 – 2 mm, hardness HRC 56 – 65.

Designed primarily for extrusion of rubbers such as:
Butyl (IIR)
Nitrile (NBR)
Ethylene Propylene Diene (EPDM)
Acrylate (ACM)
Ethylene-Acrylic Rubber (AEM)

Designed for extruders processing PVC pipes, C-profiles (doors & windows), WPC (wood-plastic), foam, pelletizing, and other extrusion applications.