Name: Conical twin-screw and barrel
Specification:  φ 45/90-   φ  92/188     L/D: 15-45 

Material:  High quality38CrMoALA or 9Cr18MoV
Craft
High quality dual phase stainless steel
Spraying hard metal with heat or cold method
Advanced nitrogen craft
Bimetal technology
 

Technical Index

Tempering Hardness: HB260-290

Nitrogen hardness: 900-1000HV

Nitrogen layer deepness: 0.5-0.75mm

Chrome-plating thickness: 0.5-0.10mm

Chrome-plating hardness: HV＞85℃

Alloy layer deepness: 1.2-2.0mm

Alloy layer hardness: HRC50-65

Nitrogen brittleness: ＜ level 1
Surface roughness: Ra0.4u

Straightness: 0.015mm

 

       Zhoushan Sitong Plastic Machinery Co., Ltd located in Zhoushan, which has always enjoyed the reputation of being a “ hometown of screw, is an early domestic company that professional in the production of precision screw and sol tube in large-scale.

      Our company specializes in making high temperature barrel & screw, wear-resisting barrel & screw and conventional barrel & screw, etc. Products are made of high quality alloy steel (38CrMoALA) and characterized with wear-resistance through fine workmanship such as the tempering qualitative, surface nitriding and polishing, which are the ideal matching products for injection molding machine, extruder, rubber machinery manufacturer and so on.