3.1 Moulding

Question 1

What product are created with blow moulding

Answer 1

drink bottles
shampoo bottles

Question 2

What is the process of blow moulding

Answer 2

paris of thermoplastic sits between mould halves

mould halves close and grip parison

hot air blown inwards forcing parison against side of mould

Question 3

What is injection moulding used for

Answer 3

electrical casings:
computers, TVs, vacuum

Question 4

How does injection moulding work (process)

Answer 4

archimedian screw turns molten thermoplastic granules towards mould.
mould moves with hydraulic ram

Question 5

What is vacuum forming used for

Answer 5

lightweight trays,
box inserts
takeaway cups and yoghurt pots

Question 6

What is the process of vacuum forming

Answer 6

mould is placed on platen and thermoplastic is heated

platen is raised whilst vacuum pumps out air and thermoplastic shapes around mould

Question 7

What is required for moulds in vacuum forming

Answer 7

draft angle
air holes
rounded corners

Question 8

What is extrusion used for

Answer 8

solid rods, tubingm curtain track

Question 9

What is the process of extrusion

Answer 9

similar to injection moulding but polymer forced through a die

Question 10

What is rotational moulding used for

Answer 10

traffic cones, kayaks, large tanks, children play equipment

Question 11

What is the process of rotational moulding

Answer 11

producing seamless hollow components

continuously roating through heating and cooling stages