production of materials - timber

Question 1

summarise 5 steps of timber production

Answer 1

1. trees cut down
2. bark removed. trunk sawn up
3. wood is seasoned by drying it
4. converted into different useful forms
   (5. processed into manufactured timbers)

Question 2

give 2 ways a trunk can be sawn

Answer 2

slab sawn

quarter sawn

Question 3

it what ways does the way a trunk is sawn affects it?

Answer 3

appearance

how much they bend / warp (twist)

Question 4

what is air - drying?

Answer 4

stacking wood outside / inside sheds allowing air to circulate around it

Question 5

what is kiln-drying?

Answer 5

done in heated chamber with fans to circulate air

quicker drying process

conditions need to be carefully controlled to avoid wood drying too quickly and damaging wood

Question 6

what is CHIPBOARD made from?

Answer 6

mixture of dried wood chips / shavings / sawdust

materials often from discarded or waste material from another process

Question 7

what is added to wood mixtures and what is the process?

Answer 7

glue - urea formaldehyde

heated / pressed into sheets / left to dry

Question 8

summarise stages of plywood production

Answer 8

1. wood softened
2. thin sheet is peeled off it then cut to suitable size and dried
3. put into stacks
4. glue added between layers then sheets heated and pressed