Revision sets for AQA product design alevel timber.
Name 3 Hardwoods and 3 Softwoods, and 3 Man Made Boards.
Hardwoods Include; Beech, Oak, Mahogany, Ash.
Softwoods Include; Douglas Fir, SprucePine, Scots Pine.
Man-made Boards Include; Medium Density Fiberboard, Chipboard, Hardboard, Plywood.
Name 4 Stock forms of timber.
Stock forms include; Sheet, Plain square edge, Dowel, Rough Sawn.
Name the Advantages of using Man-made boards over Natural Woods.
Man-made boards are available in large sizes, so small pieces of natural woods do not have to be glued.
They are readily available for use as they can be produced when needed.
They are often economically friendly as they are made from scrap wood.
They are a lot cheaper than natural woods.
Made-made boards are consistent, and have the same structure in every board. EG) Natural woods may have different knots/grain.
Man-made boards are stable as they do not warp or twist.
What does this Logo represent.
It is the Forest Stewardship Council logo. It indicates that the timber has come from a sustainable forest.
Name these Joins and their Advantages and most common uses. 1)
1) Dowel Joint, most commonly used for flat pack furniture and home assembly uses. Neat join that does not affect the aesthetics of the product.
2) Dovetail Joint, one of the strongest joint for box constructions. Joint can look very decorative, but can be difficult to cut by hand. It is difficult to pull the joint apart, and is usually used in box constructions such as draws and furniture where strength is required.
3) Cross Dowel, a metal screw is inserted and hold a machine screw in place. It is very strong joint and is often used in kitchen cabinets.
Hardwood; Give the properties, and uses of Beech. (Chopping Board).
Straight, close grained wood.
Hard but easy to work with.
It is a close grained wood which prevents food being absorbed into the chopping board.
Good hardness, which prevents the knifes cutting it.
Hardwood; Give the properties and uses of Oak (Expensive furniture).
Very strong, open grained wood.
Difficult to work with.
Contains tannic which stains blue in contact with steel.
Very little shrinkage.
Is very durable and is resistant to wear and tear with a long product life, meaning users would be getting their moneys worth.
It has a very decorative pattern/finish which suits a lot of users tastes.
Man-made board; Give the properties and uses of MDF. (School tables)
Made from waste wood fibers and urea formaldehyde adhesive.
Easily damaged by moisture.
Easily maintained, no grain.
MDF is available in long boards, so several small natural woods do not have to be glued together.
It can be laminated so any drinks, or chemicals spilt onto it can be wiped and cleaned.
The laminate also allows the table to have a nice asthetic finishes so is appealing to the school/users.
It is a readily available material, so the cost of buying the material/table is relatively low.
It is very stable, and does not warp or twist which is why it is a suitable use for table where the surface would need to be completely flat.
State the simple properties and uses of chipboard.
Difficult to join and is very weak.
Easily damaged by moisture.
The edges are easily damaged, and needs some for of protection.
Often used for kitchen top surfaces (laminated) and fire doors.
State how these Man-made boards are manufactured.
1) MFD 2) Chipboard 3) Hardboard 4) Plywood
1) MDF is made from waste wood fibers mixed together with urea formaldehyde (adhesive) under heat and pressure.
2) Chipboard is chips of timber glued together and pressed into sheets.
3) Hardboard is pulped wood fibers compressed with bonding agents, and pressed between two heated sheets.
4) Plywood is layers of veneers glued together, each veneer is glued at a right angle to the previous sheet. There is always an off number of layers.