Question

What is the maximum thickness that can be allowed for a plastics sheet in a vacuum forming process?

(a) 3 mm

(b) 3.1 mm

(c) 3.2 mm

(d) 3.3 mm

This question was posed to me by my college director while I was bunking the class.

The question is from Blow Moulding and Thermoforming in section Moulding with Polymers of Casting-Forming-Welding II

Answer 1

Right choice is (c) 3.2 mm

The best explanation: Vacuum forming process is one of the important processes that are employed in thermoforming processes. The maximum thickness of the plastic sheet has to be noted, as a clamp is to be fitted around the plastic sheet. The maximum allowable thickness of this plastic sheet is 3.2mm.