1.4.5 The use of adhesives and fixings

Question 1

Name some adhesives and substances used to stick materials together

Answer 1

Polyvinyl acetate
Contact adhesives
UV hardening adhesives
Solvent cement

Question 2

Explain PVA

Answer 2

polyvinyl acetate is used to bond most woods. Water based adhesive which soaks into the surface of the wood and sets once the wood has absorbed the water content. Not waterproof usually. Often used for indoor furniture products

Question 3

Explain contact adhesives

Answer 3

Used for large areas like sheet metal. Can join same or different materials and two surfaces are coated in adhesive and left for 10 mins before being brought into contact with each other. No clamping required as adhesion is instant

Question 4

Explain UV hardening adhesives

Answer 4

a clear liquid that cures to form a bond when exposed to UV light. Can join metal, glass and polymers. Any excess adhesive can be wiped away with a cloth before setting with UV light, giving solid and clean joint . No mixing and fast curing time. Used when transparency is important

Question 5

Explain solvent cement

Answer 5

clear liquid used to join polymers. Softens the surface of polymers to be joined, allowing them to fuse together

Question 6

What is a fixture?

Answer 6

Holds work in a given position while a manufacturing process takes place

Question 7

What is a jig?

Answer 7

Holds both the work and guides a tool