Which process can most thermoplastics be processed by?

• Rotational Moulding

• Injection Moulding

• Blow Moulding

• Compression Moulding

What form is the material introduced into the injection moulding machine?

• Small pellets

• Solid blocks

• Large pellets

• Liquid

What is used to heat up the material in the injection moulding machine?

• Sunlight

• A furnace

• Chemical reaction

• A heater

What happens to the plastic granules as they are pushed along the heater section?

• They expand

• They solidify

• They melt into a liquid

• They change color

What is the purpose of the plunger in the injection moulding process?

• To force the liquid into a mould

• To mix the plastic

• To cool the plastic

• To eject the plastic

Why is injection moulding suitable for producing Lego blocks?

• It allows for exceptional accuracy

• It is faster than other methods

• It uses less plastic

• It is cheap

What is a parting line?

• A line indicating the product's center

• A decorative line on the product

• A line where two halves of the mould meet

• A line where the plastic is cut

What causes ejector pin marks on an injection moulded product?

• Defects in the plastic

• Marks from the heating element

• Pins used to eject the plastic from the mould

• Scratches during packaging

What are gate marks?

• Indents from the cooling process

• Scratches made during demoulding

• Marks from the machine's gate

• Small nubs where the plastic enters the mould

What advantage does injection moulding provide to the finish of plastic products?

• Textured finish

• Matte finish

• Smooth finish

• Glossy finish