Zhejiang Bohai Conical twin screw barrel

Diameter

Φ25/53,35/77,45/90,51/10,

55/110,65/120,65/132,

70/140,75/150,80/156, 80/172,90/184 92/188.etc

Designing

Screw structure and compression

ratio can be designed according

to different products  &different mixtrues.

 Standard Specifications

ISO9001

Advantages

1.Long time Nitriding Technology 2.Anti-corrosion and Wear-resisting Duplex Metal Spraying Technoloy

3. we uses special alloy powders being sprayed and welded on the screw's ridge,and uses different alloy and welding methods for the screw of different functions.

Materials

38CrMoAlA 

(JIS SACM645)

SKD61 .etc

Application

 PS,HIPS,ABS,SAN,EPN/LDPE,HDPE,UHMPE,

EVA,PP,PVC,PMMA,POM,PAST,PET,PBT

Nitride Depth

0.5mm-0.8mm

Technology

1)Longer time Gas Nitriding treatment 

2)special anti-wear & abrasion alloy (bimetallic)

3)tungsten carbide;4)cobalt base alloy

5)stainless steel 6)Gh113 nickel based alloy  

Nitride Hardness

950-1050HV

Packing

Wrapped up by film in wooden

Nitride Brittleness

≤Grade One

Payment 

Term

T/T , L/C ,Western Union

Surface Roughness

Ra0.4um

Delivery 

Term

20-30 working days

Screw Straightness

0.015mm

Port

 Departure

Shanghai/Ningbo

Alloy Hardness

HRC65-75

Min. Order

1 set

Alloy Depth

1.5mm-3.5mm

Warranty period:2-4years(Depends on the plastic raw materials)

Bimetallic: much longer lifetime.

Nitriding time

Over 180 hours