Manufactured boards (AQA GCSE Design and Technology): Flashcards
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15 cards from this deck
What are manufactured boards?
What are manufactured boards?
Engineered materials from wood waste using adhesives & heat
Key advantage of manufactured boards
Key advantage of manufactured boards
Consistent properties throughout every sheet produced
What is dimensional stability?
What is dimensional stability?
Won't warp, twist, or split like natural wood over time
Manufactured boards strength vs natural timber
Manufactured boards strength vs natural timber
Can be stronger than natural timber of same thickness
Manufacturing step 1 for boards
Manufacturing step 1 for boards
Grinding/chipping raw wood into particles, chips, or fibres
Adhesive used in manufactured boards
Adhesive used in manufactured boards
Formaldehyde resin
Manufacturing step 3 for boards
Manufacturing step 3 for boards
Compression under high pressure and heat to bond particles
MDF composition
MDF composition
Wood fibres mixed with formaldehyde adhesive
MDF surface property
MDF surface property
Very smooth and flat, easily machined and painted
MDF health hazard when cutting/sanding
MDF health hazard when cutting/sanding
Produces fine dust particles harmful if inhaled
Chipboard composition
Chipboard composition
Timber flakes, chips, or strands with resin adhesive
Main weakness of chipboard
Main weakness of chipboard
Poor moisture resistance - can swell and deteriorate
How is plywood constructed?
How is plywood constructed?
Multiple thin wood layers (veneers) bonded with adhesive
Plywood grain orientation
Plywood grain orientation
Each layer perpendicular to adjacent layers
Surface treatment needed for boards
Surface treatment needed for boards
Edge treatment & surface finishing with veneer/laminate