manufacturing processes Flashcards
1
Q
bending
A
- force is applied to create a bend in the material
2
Q
blow moulding
A
- plastic is heated and placed in hollow tube (parison)
- compressed air is blown into parison to inflate it
- parison fills mould
- product removed from mould
3
Q
compression moulding
A
material placed into heated mold cavity then pressed by a hydraulic press.
4
Q
die casting
A
- two halfs of the die are clamped
- metal injected into the die
- metal is cooled
- material is ejected
- material is trimmed
5
Q
drop forging
A
- material placed in the die
- hammer raised and dropped onto the workpiece
- open die or closed die
- material removed
6
Q
extrusion moulding
A
- granules melt into liquid
2. forced through die to create tube shape
7
Q
injection moulding
A
- material is heated
- injected into mould
- material cools in the mould
- material ejected using ejector pins
8
Q
vacuum forming
A
- plastic heated to forming temperature
- placed across a single surface mould
- forced against the mould by a vaccum
9
Q
when to use “bending”
A
metal with a V shape bend, U shape bend. or any curve
10
Q
when to use “blow moulding”
A
hollow thermoplastic objects
11
Q
when to use “compression moulding”
A
strong plastic parts needed
12
Q
when to use “die casting”
A
non ferrous metals and alloys
13
Q
when to use “drop forging”
A
steel, magnesium, aluminium, stainless steel
14
Q
when to use “extrusion”
A
long tube shapes
15
Q
when to use injection moulding
A
complex metal or plastic parts
16
Q
when to use “vacuum forming”
A
hollow packaging box like shapes
