Ruian Yumin machine screw co.,ltd is a factory specialized in making screw barrel, filter, mould, gearbox and recycling machine. These products are main parts of plastic machines and package machines. Founded in 1988, Yumin machine screw factory has worked in this field more than 20 years and has become the main supplier of some famous plastic machine and package machine factories in Wenzhou area and other parts of China. With the advanced technology and efficient management, we have the confidence and ability to give the best product with excellent quality for our customers.

Size: screw diameter:Φ20-Φ500mm

      Maximum screw length:10000mm

      Barrel inner bore diameter:Φ500mm

Material:    38CrMoAlA   

                 40CrMo   

                 42CrMo  

                 high quality alloy steel

Technology: nitriding treatment,

                   alloy coating spraying,

                   heating treatment,

                   screw fully hardening,

specifications:

 Depth of nitriding layer: 0.5-0.8mm

Nitriding treatment, surface hardness: HV≥900-1000

Fragility of nitriding: less than grade 1

Surface roughness: Ra 0.4um

Surface of hardness of nitrated Cr coating layer: ≥950HV

Thickness of Cr coationg layer: 0.03-0.08mm

Used for granulation,PP, PE, PA, PC,ABS,ASetc

We can manufacture various kinds of screw barrels according to the customer’s requirement