We are manufacturer of single plastic extruder screw.

Our company is specialize in manufacturing and researching screw barrel, filter and mold. We have been in this field for 21 years.We can supply and design all kinds of screw barrel according to your requirement. We use Japan numerical control and computer control processing device to process screw.

The single screw and barrel for extruder have the follow specification.

* 1 12289: The single screw and barrel material

A 12289 : 38CrMoAlA. This kind of material is applicable to double alloy and common molding screw.
B 12289 9 Gr 18MoV
C 12289 42CrMo

* 2 12289 Technics

A 12289 : Heating treatment
B 12289 : Nitriding treatment
C 12289     : Spray bimetallic alloy coating

3 12289: Technical parameter

A 12289 Depth of Nitration layer:0.5-0.8mm
B 12289 Hardness of Nitration :900-1000HV
C 12289 Fragility of Nitration:less than grade 1
D 12289 Roughness of the surface::Ra0.4
E 12289 Straightness of the screw:0.015mm
F 12289 Surface hardness of Nitrated Cr coating layer>=950HV
G 12289 The thickness of Chrome-plating layer:0.025-0.085mm
H 12289 Depth of alloy layer.>2mm.