Specifications

What we do is to guarantee the highest level of quality for each screw and barrel from shenglong machinery.

screw and barrel for extruder

 

Screw diameter: Φ20-Φ500mm

Maximun screw length: 10000mm

 

The propertise are summarized ;

 

1. Materials:  38crmoALA(this kind of material is applicable to double alloy and common molding screw), 42CrMo, SKD61(this material is abrasion resistance),SACM425, stainless steel(this kind of material is corrosion resistance, and applicable to PC,PVC, transparent material),  and so on.

 

2. Treatment; quenching, nitriding,blackening, electroplated hard-chrome (according to the clients' requirement).

 

3. Suitable plastic material: PP,PE,ABS,AS,PS etc.

 

4. We can do all types of screws according to clients' requirements.

 

If you have any questions or want more details of our products, please contact with us.

 

3.Technical parameter:

 

1):Depth of Nitration Layer:0.5-0.8mm

 

2):Hardness of Nitration:900-1000HV

 

3):Fragility of Nitration:Less than grade 1

 

4):Roughness of the surface:Ra0.4

 

5):Straightness of the screw:0.015mm

 

6):Surface hardness of Nitrated Cr coating Layer:>=950Hv

 

7):The thickness of Chrome-plating layer:0.025-0.085mm