In the extrusion process, a cast type barrel is mainly used for the heating of polymer material.(a) True(b) FalseThe question was asked in a national level competition.I want to ask this question from Extrusion in Polymers in portion Moulding with Polymers of Casting-Forming-Welding II

In the extrusion process, a cast type barrel is mainly used for the he

1.	In the extrusion process, a cast type barrel is mainly used for the heating of polymer material.(a) True(b) FalseThe question was asked in a national level competition.I want to ask this question from Extrusion in Polymers in portion Moulding with Polymers of Casting-Forming-Welding II
Answer» Correct option is (b) False For explanation I would say: There are MAINLY two types of barrel HEATERS used in the extrusion process, which are band and cast barrel. The band type barrel is used for heating the polymer MATERIAL while the cast type includes some channels to contain a flow of cooling medium which is USUALLY water, but the oil is more preferred because it can prevent thermal shock to the barrel.

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