16 novembre 2015 ~ 0 Commentaire

Twin Screw Extruders for the compoundingof engineering thermoplastics

Polymers are blended making use of their compounding ingredients in extruders. The blending of basic components such as antioxidants and light stabilisers is done either over the last phases of the polymerisation process or soon after in an extrusion step which is followed by granulation. Actually most if not all plastic material granules sold in carriers, have already been subjected to the effects of heat as well as shear, once after their development plastic sheet extrusion machine and another right time at the compounders who also produce particular grades and colours. Compounding extruders are classified in sole screw and twin screw extruders. The mixing aftereffect of single screw extruders depends on the shear generated between your wall space of the barrel and the screw. The shear mixing of twin screw extruders is definitely more efficient and for that reason the polymer is put through less thermal history.

Brabender experimental twin screw extruder

Twin screw extruders, are used for bulk polymerisation, digesting (pipes, sheet..) or compounding. Mass polymerisation twin screw extruders will be used in the produce of TPU, POM etc. Twin screw extruders are also used, like sole screw extruders in the manufacture of finished products such as pipes and sheet. This short article will get confined to giving an account on twin screw extruders found in the compounding of engineering thermoplastics. In cases like this the extrudate takes the proper execution of slim rods which are pelletised. The pellets are injection moulded.

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