Question

Which of the following methods is used for manufacture of lightweight bottles?

(a) Screw press and blow

(b) Blow and blow

(c) Narrow neck press and blow

(d) Neck blow and press

I have been asked this question during an internship interview.

Asked question is from Manufacture of Glass topic in portion Glass Packaging Materials of Food Packaging Technology

Answer 1

Correct answer is (c) Narrow neck press and blow

To explain I would say: Narrow neck press and blow (NNP&B) is a used for manufacture of lightweight bottles. It is the process in which the gob is delivered into the blank mold and pressed by a metal plunger. The plunger and gob together have the same volume as the blank mold cavity.