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Design and Manufacture Materials
Beschreibung
National 5 National 5 Mindmap am Design and Manufacture Materials, erstellt von JamesJambles am 06/04/2014.
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national 5
national 5
Mindmap von
JamesJambles
, aktualisiert more than 1 year ago
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Erstellt von
JamesJambles
vor mehr als 10 Jahre
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Zusammenfassung der Ressource
Design and Manufacture Materials
Wood
Softwoods
Coniferous Trees
Evergreen
needle - leaved
Cone - bearing
examples
Scots pine
Used for DIY
Parana pine
Used for doors and stairs
Spurce
Used in bedrooms and kitchens
Yellow Cedar
Used for furniture
Hardwoods
Deciduous Trees
Black walnut
Willow oak
Box elder
examples
Beech
Used for toys and tool handles
Oak
Used for high class furniture
Mahogany
Used in bars (Pubs)
Balsa
Used for light work modelling
Differences
Hardwoods lose their leaves
Hardwoods are more expensive
Softwoods grow faster
Softwoods are lighter
Metals
Ferrous
Contain iron
examples
cast iron
Mild steel
Medium steel
Stainless steel
Non - ferrous
Don't contain iron
examples
Aluminium
Zinc
Duraumin
Copper
Most metals are good conductors
They can also be recycled
Most metals are extracted from ores using chemical reactions
Metals are usually mixed with other metals to help improve their properties
This is called an Alloy
Plastics
Natural
Plants
Cellulose can be extracted
Trees
Latex and amber can be extracted
Animals
Horn and milk can be extracted
Used to make glues
Synthetic
Crude oil
Coal
Natural gases
Working Properties
Conductivity
Can the material conduct heat or electrical energy
Strength
Can force be applied to it without it breaking
Elasticity
Can it bend and return to how it was before
Plasticity
Can it change shape permanently
Malleability
Can it deform it all directions without breaking
Ductility
Can it deform (usually along it's length)
Hardness
Can it take a bit of wear and tare
Toughness
Can it take blows and sudden shocks without breaking
Durability
Can it withstand wear (Especially with weather)
Fusibility
Can it change state wen it's heated to it's melting point
Components
Smaller parts used to make up an object
Often used to join materials together
Different components are used to join different materials
Plastics
Woods
Metals
Made from resistant materials
Usually read made when bought
Most Common
Nails
Screws
Hinges
Catches
Joints
Most joints are made from more than one piece of material
Joints are used to connect pieces of material together
Permanent joints are intended to stay put. They are normally done used nails, rivets or one of the heating processes.
Temporary fittings are usually involve components being fitted using a screw thread so it can be taken out again.
Plastics are usually moulded so they snap together
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