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
Advanced nitrogen process, spraying alloy to anti-friction and anti-corrosion


 

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.