The use of finishes, POLYMERS 3.1.5

Question 1

What is Over moulding?

Answer 1

Moulding a second polymer over specific parts of a product.
- TPE is often used
- Overmoulding provides read of grip or texture
- Overmouldings can highlight different colours for different components parts on product.

Question 2

What are the two methods of overmoulding?

Answer 2

Two Injections Moulding moulds :
- One mould for the product and another for the grip area
- product is injection moulded, then placed into a second mould.
Twin shot INjection moulding
- very fast continuous cycle process
- mould has two cavities that can be rotated so they line up with twin injector points
- main product is created in first mould cavity
- Mould will open slightly and rotate
mould closes and a second injection is applied to overmould.

Question 3

What are examples of polymer finishing?

Answer 3

• Adding Pigments
• Overmouldings
• Acrylic spray paint