Screw & barrel for squeezing machine

▌Brief Introduction:

Screw barrel for squeezing machine are almost very big diameter, most popular screw diameter is from Φ250-Φ350mm, screw aspect ratio is around 3-4, screw always has 3 parts: main screw, screw head and end cap; barrel always has a lot of small holes on the body, barrel inner wall has 5-6 pieces uniform distributed straight welded bars, this type screw barrel set has a lot accessories, we all can produce.

▌Specification:

Screw diameter: Φ220-Φ380mm

Aspect ratio: 3-6

▌Basic material: 38CrMoAlA

▌Technics:

Tempering treatment

Nitriding treatment

▌Technical Parameter:

Hardness after tempering: HB260-300
Nitriding hardness: 850-1000HV
Nitrided layer depth: 0.5-0.8mm
Nitrided brittleness: Less than grade 2
Surface roughness: Ra0.4
Screw straightness: 0.015mm