
404 Engineering Materials Technology
9 Intricate, complex
shapes
- injection moulding, blow moulding, transfer
moulding and extrusion.
10 Threads - injection moulding, blow moulding, casting and machining.
11 Large formed
sheets
- thermoforming.
Figure 19.5 shows some of the characteristics of the different types of polymer
processes.
The assembly processes that can be used with plastics are welding, adhesive
bonding, riveting, press and snap-fits, and thread systems.
Casting
Forming
Compression transfer moulding
Injection moulding
Extrusion
1(T
4
1(Γ
3
1(T
2
10
_1
1 10
Section thickness m
Casting
Forming
Compression transfer moulding
Injectio