Screw
 

Screw is responsible for mixing plastic raw material with additional materials (calcite, colour pigment, etc.) and convert them to uniform melt thus, makes it the most important part of a plastic machinery.

Due different plastic materials have different melting properties, the geometrical design of the screw is crucial. EFOR LTD designs each screw uniquely according to type of plastic raw material which, aims to achieve the best melt quality.

The dimension span of the screws manufactured by EFOR LTD can be found on Table-3. Note that the values given in Table-2 are the dimension of 1-pieced screws. The screws with more length are produced as multiple pieced barrel.