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This series of two-sided heterotrophic parallel twin-screw and barrel are suitable
for manufacturing pipe material, special shape material, plate material, sheetmaterial, changing plastic properties, and soft / hard PVC pelletizing. The compression
ratio of screw and barrel can be designed according to different raw materialsand products.Technical specifications:1) Material: quality 38CrMoAlA2) Hardness after hardening and tempering: HB240-2803) Nitride hardness: HV850-10004) Nitride case depth: 0.45 - 0.7mm5) Nitride brittleness: less than grade 26) Surface roughness: Ra 0.47) Screw straightness: 0.015mm8) Surface chromium-plating's hardness after nitriding: ≥900HB 9) Chromium-plating depth: 0.05 - 0.10mm10) Alloy hardness: HRC50-6511) Alloy depth: 0.8 - 2.0mm