PVC Extruder machine gearbox tandem bearing F-83053.T2AR 

Product Details

PVC Extruder machine gearbox tandem bearing F-83053.T2AR

F83053T2AR f-83053.t2ar bearings specification as following:

Plastic Extrusion: Single-Screw Machines

Extruder machines are employed primarily to manufacture thermoplastics including larger-profile products such as bars, PVC pipes, and hoses. They come in single-screw and twin-screw varieties; the majority are single-screw.

The single-screw extrusion process works as follows: The plastic raw material is fed from a hopper or feeder into the extruder barrel. The extruder’s heater melts the material in the barrel, triggering a chemical reaction. A screw located in the barrel rotates at a constant speed, propelling the melted material forward. Speeds in single-screw extruders are normally low, ranging from 25 to 450 rpm (or r/min).

Twin-Screw Extruders

The basic operation of twin-screw extruders is similar to that of single-screw machines, with one important difference: twin-screw extruders have two intermeshing screws that rotate in the same direction (co-rotating) or in opposite directions (counter-rotating). Co-rotating machines provide additional mixing power, whereas counter-rotating machines generate a smoother, more consistent end product.

Twin-screw extruders operate at relatively low rotational speeds of up to 1,200 r/min. They are driven by parallel-shaft gearboxes that have two output shafts instead of one. Axial loads induced on both screws are supported by thrust bearings on the gearbox output shafts.