Single stage stretch blow moulding is always preferred than two stage stretch blow moulding for increase in production rate.(a) True(b) FalseThis question was addressed to me in an online quiz.Question is taken from Blow Moulding and Thermoforming in section Moulding with Polymers of Casting-Forming-Welding II

Single stage stretch blow moulding is always preferred than two stage

1.	Single stage stretch blow moulding is always preferred than two stage stretch blow moulding for increase in production rate.(a) True(b) FalseThis question was addressed to me in an online quiz.Question is taken from Blow Moulding and Thermoforming in section Moulding with Polymers of Casting-Forming-Welding II
Answer» The CORRECT answer is (b) False The explanation: Two stage stretch blow moulding is same as SINGLE stage stretch blow moulding, except preforms (TUBE of plastic) which are already made in the two stage process. The single stage process is generally accomplished by using single MACHINE, where the two stage process USES preforms that already present in the process. This results in saving of time which directly increases production rate.

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