Moulding

Question 1

Very common and highoy outomated process.

Example: A chair because it is not uniform cross-section

Answer 1

Injection

Question 2

• Fill the hopper with plastic granules or powder.
• Which in turn is pushed down the chamber by the screw
• The granules are heating up to become a liquid by the heater bands
• The liquid is forced under pressure into the mould.
• The mould is then cooled and opened to remove the finished moulding.

Answer 2

Injection

Question 3

……………… is a continuous process

Answer 3

Extrusion

Question 4

• Fill the hopper with plastic granules or powder.
• Which in turn is pushed down the chamber by the screw.
• The granules are heating up to become a liquid by the heater bands
• It goes through the metal die that shapes the plastic.

Answer 4

Extrusion

Question 5

• Warm compressed air is blown into the tube so it forces into the mould.
• When it hits the mould it cools down because the mould is very cold.
• Open the moulded and remove the moulded plastic.

Answer 5

Blow Moulding

Question 6

Uniform Cross-Section

Answer 6

Anything that is exactly the same all the way through is extruded.