Deforming and reforming (AQA GCSE Design and Technology): Flashcards
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Laminating definition
Laminating definition
Joining thin timber layers with adhesive to create stronger material
Steam bending definition
Steam bending definition
Using steam to soften timber fibres for bending into curves
Effect of thinner laminates on curves
Effect of thinner laminates on curves
Thinner laminates allow tighter curves
Best adhesive for laminating timber
Best adhesive for laminating timber
PVA (Polyvinyl Acetate)
Hardwoods best for steam bending
Hardwoods best for steam bending
Ash, elm, hickory, and oak
Strength of laminated vs solid timber
Strength of laminated vs solid timber
Laminated timber is significantly stronger than solid timber
What steam bending does to moisture content
What steam bending does to moisture content
Increases moisture content of timber
What steam breaks down in wood
What steam breaks down in wood
Lignin - makes wood flexible
Why steam-bent timber is stronger than cut curves
Why steam-bent timber is stronger than cut curves
The grain follows the curve rather than being cut across
Steam timing per 25mm thickness
Steam timing per 25mm thickness
Around one hour per 25mm of timber thickness
Purpose of barrier sheet in laminating
Purpose of barrier sheet in laminating
Prevents laminates sticking to former
Type of material laminating creates
Type of material laminating creates
Composite material
Common applications of steam bending
Common applications of steam bending
Walking stick hooks and curved chair backs
Working time after removing from steam box
Working time after removing from steam box
Limited - must bend while hot and flexible
How laminating overcomes short grain weakness
How laminating overcomes short grain weakness
Distributes weak areas throughout the structure