Wood, Metal And Plastic Flashcards by Leighton Ree

Name the 3 types of woods

Softwood
Hardwood
Manufactured

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Give some examples of softwood

Scots pine
Spruce
birch
Douglas fir
redwood
yew

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Give some examples of hardwood

Oak
Mahogany
Beech
Ash

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What wood can be coniferous?

Softwood

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What wood can be deciduous?

Hardwood

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How do you identify

a softwood tree?

Softwood have needles, pines and are evergreen

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How do you identify

a hardwood tree?

Harwood does not have needles and pine cones. The leaves also fall off annually

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What is a manufactured wood?

Manufactured woods are made from machines and are made up of scraps of wood

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Give some examples of manufactured wood

Plywood
MDF
Chipboard
Blockboard
Hardboard

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Name some wood work joints

Mortise and Tenon
  (stopped and through)
Lap joint
Butt rub joint
Dowel Joint
Rebait joint
Having joint

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What is a thermoplastic?

A plastic that can be heated and shaped as many times as you want

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What is a thermosetting plastic?

A plastic that can only be heated and shaped once

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Give some examples of

thermoplastics

Acrylic
Polystyrene
Polythene ( HDPE & CDPE)

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Give some examples of

thermosetting plastics

Epoxy resin

Polyester

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How can you tell if something has been injection moulded?

Look for the:
Injection marks
Ejection marks
The split lines
Surface designs

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What plastic process would be used to make a wheelie bin?

Rotation moulding

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What plastic process would be used to make

tubes, boxes and bars?

Extrusion moulding

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What plastic process would you use to make chairs?

Injection moulding

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What plastic process would you use to make plastic bottles?

Blow moulding

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What plastic process would you use to make biscuit trays?

Vacuum forming

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What are the 2 advantages of using plastic dip moulding?

Makes it look better

Protects metal from rust

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Name the 4 main parts of a

Wood turning lathe

Headstock
Tailstock
Tool rest
Bed

Name some wood turning tools

Revolving centre 
Dead centre
Fork centre
Parting took
Gouge
Round scraper
Skew chisel

What are face plates used for?

To make wooden bowls on the lathe

What is the 1st stage in wood turning?

On both ends of the wood mark a line from corner to corner to establish the centre

What is the 2nd stage in wood turning?

On one end of wood, using a centre punch, make a hole

What is the 3rd stage of wood turning?

On the opposite side of the centre punch cut a kerf for the centre fork

What is the 4th stage in wood turning?

Plane all 4 corners from top to bottom to make a octagon shape

Name the metal lathe processes

``` knurling Facing off Parting off Parallel turning Taper turning Centre drilling Chamfering ```

What are the main parts of the metal work lathe?

``` Headstock Tailstock Bed Tool post 3 jaw chuck Saddle Saddle wheel Cross slide Compound slide ```

What is the skew chisel used for?

Used to give a good finish on wood when working on the lathe

What is the round scraper used for?

They are used for working on the inside of wooden bowls & goblets

What are Revolving centres used for?

Used to support long pieces of wood and metal when working on the wood or metal lathe

Name the plastic processes

``` Extrusion injection blow rotational vacuum forming line bending ```

What is an alloy?

A mixture of pure metals or a metal with a substance such as carbon added steel (iron & carbon) duralumin (aluminium & copper) brass (copper & zinc) bronze (copper & tin)

What is a ferrous metal?

A metal that contains iron cast iron mild steel high carbon steel

What is a non-ferrous metal?

A metal that doesn’t contain iron ``` aluminium copper brass duralumin lead tin zinc ```

What shapes do metals come in?

``` round rod sheet squares flats tubes angled ```

What is engineer’s blue?

Blue ink that is applied to metal to make markings out easier

What is the difference | between an engineers square and a try square?

An engineer square is smaller and made of metal. It can be used on metal and plastic

What is a centre punch used for?

Before metal can be drilled there must be a centre punch so the drill bit doesn’t slide on the metal

What are the spring dividers | used for?

Used to mark out circles and arks

Why is a micro meter better than a steel rule?

A micrometer is a lot more accurate and you can see smaller sizes

What is an odd leg calliper used for?

They are used to mark out lines parallel to the edge on metal

What are tin snips, notchers and guillotines used for?

Used to cut sheets of metal

Name the 3 taps

Taper tap Second tap Plug tap

What tool hold taps?

Tap wrench

Name the 4 rivets

Snap/round headed Countersink Flat Pop

what is work hardening?

if a material has been bent, hammered or twisted consistently over a period of time the metal will harden

what is annealing?

used to fix work hardening by softening the metal

what is malleability?

this is the ability of material to withstand being hammered, rolled or bend without snapping

what is ductility?

this is the ability of material to withstand being stretched and not breaking

what is toughness?

the amount of energy it can absorb without breaking and measures its ability to withstand shocks, the opposite of brittleness

what is brittleness?

hard but easy to brake