Plastic Processes Flashcards
1
Q
What is the mould made from for vacuum forming?
A
MDF
Styrofoam
Aluminium
2
Q
What is needed to make a mould successful when vacuum forming?
A
Draft angle
Vent holes
Rounded corners
3
Q
How is the bottle shape produced from the parison?
A
The parison is molted
Tube is placed inside a split mould
Air is blown into parison (tube)
The parison is expanded to create bottle shape
The mould seals the bottom of the parison
4
Q
In blow moulding explain why the mould is cooled?
A
Freezes polymer on contact
Allowing high speed production
Enables the bottle to be removed easier
5
Q
What types of product are made by: Extrusion Vacuum forming Injection moulding Blow moulding
A
1) pipes
2) food trays, yoghurt pots, hollow objects
3) toys, complex 3D shapes
4) bottles
6
Q
The process of forming a thin sheet of material to make blister packaging?
A
Vacuum forming
