Commercial processes (AQA GCSE Design and Technology): Flashcards
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Practise the cards
15 cards from this deck
Key property of thermoplastics
Key property of thermoplastics
Can be softened when heated & reshaped
Two main commercial polymer processes
Two main commercial polymer processes
Injection molding & extrusion
4 popular polymers used commercially
4 popular polymers used commercially
Polystyrene, nylon, polypropylene, polyethylene
What injection molding transforms
What injection molding transforms
Polymer granules into shaped objects
Why injection molding suits mass production
Why injection molding suits mass production
Delivers repeatable accuracy across many items
Stage 1 of injection molding
Stage 1 of injection molding
Plastification - heating granules to melt
Archimedes screw function in injection
Archimedes screw function in injection
Moves granules forward in heated barrel
Stage 2 of injection molding
Stage 2 of injection molding
Injection - filling mold cavity under pressure
Die cavity in injection molding
Die cavity in injection molding
Mold space filled with molten polymer
Stage 3 of injection molding
Stage 3 of injection molding
Cooling & ejection of finished product
What extrusion creates
What extrusion creates
Continuous lengths of shaped polymer
Mandrel in extrusion
Mandrel in extrusion
Solid core inside die to make hollow products
How mandrel creates hollow sections
How mandrel creates hollow sections
Polymer flows around it, leaving hollow center
3 extrusion applications
3 extrusion applications
Plumbing pipes, electrical conduits, structural tubing
Injection molding vs extrusion difference
Injection molding vs extrusion difference
Individual items vs continuous lengths