Materials for technical use

Materials for technical use

1. Raw materials

   • Is a substance taken directly from the nature
   • Depending of its origin it can be:
     • Animal-bassed raw material
     • Vegetable-bassed raw material
     • Mineral-bassed raw material

2. Processed material

   • Is a material that is maked by other raw materials and that is used to create products

3. Finished products

   • Is an object created by materials and that has a function
   • Example: we use the trunks from the forest to transform it into plank and transfomr that into furniture.

4. Technical materials

   • Wood
     • Is taken from the ligenous part of a tree
     • Enginereed wood:
       • Plywood
       • Chipboard
       • Fibreboard
   • Metals
     • Metals come from minerals wich are part of a rock
     • Ferrous: contains iron
     • Non-ferrous: doesn't contain iron
   • Plastic
     • mostly made from petrol or carbon and very used to make toys
   • Textiles
     • Used to make threads and then make somethings like a shirt
   • Stone and glass
     • Made from rocks in different forms
   • Ceramics
     • Made by moulding clay and then baked to convert it into ceramic.

5. Technical properties

   • Electrical
   • Thermal expansion
   • Mechanical resistance
   • Toughness
   • Hardness
   • Permeability
   • Oxidation
   • Malleability and ductility
   • Elascity
   • Fusibility

6. Equipment

   • Ruler
   • Carpenter's ruler
   • Measuring tape
   • Protractor
   • Handsaw
   • Keyhole saw
   • C-clamp
   • Brench vice
   • Fret saw
   • Electric drill
   • Circular saw
   • Utility knife
   • Gimlet
   • Hand drill
   • Awl
   • Sandiing machine
   • Planing machine
   • Sandpaper
   • Rasp
   • File
   • Carpenter's mallet
   • Mortise chief

7. General properties of wood, metal and plastic

   • Wood
     • It has acoustic conductivity, thermal expansion, malleability, ductility, toughness, permeability and mechanical resistance.
   • Metal
     • It has: electrical conductivity, thermal conductivity, acoustic conductivity, thermal expansion, fusibility, malleability, ductibility, mechanical resistance, toughness and oxidation.
   • Plastic
     • It has: thermal expansion, some fusibility, malleability, ductibility, mechanical resistance and toughness.