Bakelite injection screw barrels

• Specification

• Screw diameter: Ø12-300MM L/D:15-55




• Barrel diameter:  Ø25-500MM      Length:300-1000MM

• 1. Desigin structure of screw and barrel based on real situation




• 2. Professional technician offer optimal solution to reach better performance




• 3. Applying advanced bimetallic spraying process




• 4. Professional skilled worker manufacture high precision screw barrel




• 5. Wood package to maintain shipping safety




• 6. Promptly after sales tracking service




• 7. 24 hours inquiry servicef




• Material

38CrMoAlA(JIS SACM645)

Cr12MOV(JIS SKD-11) 
4Cr5MoSiV1(JIS SKD-61) 
42CrMo(AISI 4140)

9Cr18MoV
Stainless steel,etc.




• Parameter




Roughness of the surface:Ra0.4um

Linearity of the screw: ≤0.015mm

Linear axis limit: ≤0.02mm

Fragility of Nitration:≤Two class


Nitriding treatment(120 Hours)

Depth of Nitrided Layer: 0.5-0.8 mm

Hardness of Nitrided Layer: 900-1020Hv (HRC56°-65°)

Grade	Material	Process
Standard grade	38CrMoAlA	Nitriding 96 hours
Bimetallic grade	38CrMoAlA	HP/HVOF
TC-A grade	Tungsten carbide 40%	Centrifugal casting
TC-B grade	Tungsten carbide 25%	Centrifugal casting
TC-C grade	Tungsten carbide 10%	Centrifugal casting

• Feature

• The most important design requirements for bakelite screw barrel.




• The injection screw has no zone of compression.




• The cylinder should be heated by oil.




• The screw should be made of wear-resistant steel with a surface hardness of 60 HRC.




• The cylinder should be also wear-resistant (bimetallic cylinder).




• Electric heating cartridges can be used to heat the mould