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MANUFACTURING PROCESSES (Injection Moulding (identifiable features (very…
MANUFACTURING PROCESSES
Injection Moulding
machine is expensive
identifiable features
very detailed
different thicknesses
split line
sprue point
ejector pin marks
materials
polyetheline
polypropelene
high and low density polyetheline
examples
trays
kids toys
cases for phones
things with complicated detail and different thicknesses
Rotational Moulding
examples
kayaks
hollow things
plastic balls from ball pits
identifiable features
split line
materials
thermoplastics
Vacuum Forming
identifiable feature
5 - 10 degree sloped sides
thin and flimsy
materials
polyetheline
examples
thin plastic tray in chocolate box
quite a lot in food packaging
bodies of toy cars
Extrusion
identifiable features
smooth
long sections of the same thickness
examples
tubes
window sills
hollow pipes
slalom poles
materials
thermnoplastics
polythene
PVC
Polypropolene
Blow Moulding
materials
PET
thermosplastics
LDPE
HDPE
polypropelene
Examples
water bottles
hollow containers
identifiable features
split lines