Timber based material Flashcards
what is chipboard
a man made sheet material, made from small chips of timber glued together to produce a dense sheet
what is MDF
manufactured board made from small timber fibres that are mixed with wax and resin. they are heated and compressed so that a flat, usable sheet is produced
how is plywood made
by gluing at least three layers of sheet timber together at right angles to each other (laminating)
why is plywood a strong wood
because the grain of the timber sheets are glued together in different directions
ways timber can be altered
- staining
- varnishing
- oiling
- waxing
- painting
- laminating
why is MDF often laminated with a single sheet of hardwood veneer
to give the impression that solid hardwood gad been used to make a product, but at a fraction of a cost
how to prevent timber from snapping
- kerfing
- soaking the timber in water
- exposing the timber to steam
what is kerfing
cutting slots in a material to aid bending
how to reinforce or strengthen timber
- have the timber glued at right angles to each other, it makes it harder to bend
what is high cross - sectional stability
the ability to withstand flexing
How is timber made step by step
- tree is chopped
- branches are removed, so were only left with the trunk
- the tree trunks are transported to a sawmill, where the trees are cut to usable planks (this is called conversion)
- At this point, the timber can be sold, and if its been freshly cut, its sold as green timber because of its high moisture content
- if the timber has been dried out before being sold, then it has been seasoned, can be done by air or with kiln
what is rough cut timber
timber that is cut quickly with a saw only
what is a planed square edge
the process of using a plane to smooth one edge of a plank
what is a plank
a piece of timber that is longer and wider than it is thick
what is board
a piece of material that is much wider than it is thick