PET Packing Belt Screw Barrel

Features:

Feeding stability

Strong plasticization

High yield

Material: high quality alloy steel 38CrMoAlA

Screw length-diameter ratio generally tends to be larger, more than 32 ratio, which can ensure enough extrusion pressure and plasticization degree. The screw structure is roughly divided into three sections plus mixing head. But we also can design screw structure according to customers’ needs.

For raw material impurities, our company can provide exhaust screw barrel, so that the gas impurities can be exhausted from the exhaust port to ensure the smoothness of products. In addition, the drying process is avoided.

screw diameter： Ø25~Ø250

nitriding depth：0.5mm-0.7mm

Bimetal screw： Alloy layer hardness HRC>60

Surface layer hardness: HV960-1100

Alloy layer depth：1.2mm-2.03

Screw Straightness：0.015mm

Chrome plated screws：Chromium layer thickness：0.03-0.06mm

Surface Roughness：0.04Ra/um~0.08Ra/um

L/D：（23~30）：1