Understanding Injection Moulding Techniques

What is the primary material used in injection moulding?

• Metal

• Plastic

• Wood

• Glass

Which of the following is a key advantage of injection moulding?

• High production cost

• Limited design flexibility

• High production speed

• Low durability

In injection moulding, what is the purpose of the mould?

• To cool the plastic

• To shape the plastic

• To heat the plastic

• To colour the plastic

What is the typical temperature range for the plastic in the injection moulding process?

• 20-50°C

• 100-150°C

• 200-300°C

• 400-500°C

Which of the following is NOT a phase in the injection moulding cycle?

• Clamping

• Injection

• Cooling

• Painting

What is the role of the injection unit in an injection moulding machine?

• To open the mould

• To inject molten plastic into the mould

• To cool the mould

• To remove the finished product

Which of the following is a common defect in injection moulding?

• Warping

• Rusting

• Fading

• Cracking

What is the typical pressure range used in the injection moulding process?

• 10-50 psi

• 100-200 psi

• 500-1000 psi

• 1000-2000 psi

Which of the following materials is commonly used for making injection moulds?

• Aluminium

• Steel

• Copper

• Plastic

What is the function of the cooling system in an injection moulding machine?

• To heat the plastic

• To maintain the temperature of the mould

• To solidify the plastic

• To lubricate the machine