Finishes And Surface Treatments (plastics)

Question 1

How are polymers described as (in terms of finishings)

Answer 1

Self finishing. This means that they require no further finishing.

Question 2

Degating

Answer 2

Removing the runners and gates used to inject the polymer into the mould cavity

Question 3

Deflashing

Answer 3

Removing excess polymer, called flashing, which has leaking out between the two halves of the mould

Question 4

Cleaning

Answer 4

Removing the grease and dirt that can be picked up from the ,aching spraying or dipping paarst in a mild detergent

Question 5

Decorating

Answer 5

This may include printing and painting

Question 6

School based finishes

Answer 6

• cleaning and polishing the edges of acrylic

- trimming and the finishing the edges of a vacuum forming

Question 7

Cleaning and polishing

Answer 7

• draw filling the edges
• moving through progressively higher grades of wet and dry paper
• a final polish by hand or by buffer

Question 8

Trimming and finishing the edges of a vacuum forming

Answer 8

• trimming the edges with a craft knife or specialist trimming tool
• scraping a steel ruler along the edges