Extrusion Process are mainly of three types- Direct or Forward Extrusion, Indirect or Backward Extrusion & Hydrostatic Extrusion. This blog would speak on Forward or Direct Extrusion.
Direct Extrusion, also known as forward extrusion or in-line compounding, is used greatly in production of semi-finished products including films, plates, profiles and even tubes in one process step. The intermediate steps of pelletizing are not needed in forward extrusion, thereby being very economical. It requires very little investment and has considerably low operating costs and energy requirements for extrusion. Till date, certain products can only be manufactured by in-line compounding owing to the single-stage direct extrusion needed. In direct extrusion, final product quality is the most important decisive factor in the complex production process.
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