Vacuum forming

What is Vacuum Forming ?

• Where molten plastic is pushed along a screw into a mould
• Where heat, a mould and air is used to manipulate flexible plastic
• Where pressure is put on top of the plastic to force it into a die

What material is used in Vacuum forming ?

• Polypropylene
• H.I.P.S
• Thermoplastic
• All of the above

What is a thermoplastic?

• Plastic that doesn't melt
• A plastic that is constantly hot
• A plastic that resists heat
• Plastics that can be heated, formed and returned to a sheet

What objects can be made from thermoplastics? Choose two

• yogurt pots
• disposable cups
• a water bottle
• plug sockets

The plastic becomes ________ when heated

• molten
• a gas
• Flexible
• difficult to work with

The _______ ________ is turned on to warm the plastic

• wood burner
• electric heater
• warm sun
• hot fire

Why is the Vacuum pump turned off?

• so that the air can enter
• so that the plastic doesn't break
• so that the plastic is softened
• so that the plastic is sucked onto the mould

What type of wood is the mould made from?

• MDF
• scotts pine
• plywood
• mahogany

When do you know the plastic is ready to be formed

• After 3 minutes
• After 7 minutes
• When it starts to sag
• When the plastic is bouncy and loose

Which of the following is NOT a property of vac forming plastic

• it is colourful
• it can only be formed once
• it is easy to clean
• it is inexpensive