Technology DT4

  1. Oblique drawing- 4 things you need to do for 100%
    • Labelled in MM
    • Drawn with pencil and ruler
    • Shaded and coloured
    • Use parallel lines
  2. Safety symbols- what colour represents...

    Mandatory
    PrecautionĀ 
    DO NOT
    • Mandatory- blue
    • Precaution - red
    • DO NOT- yellow and black
  3. Scroll saw/ hegner saw
    Used for cutting shapes too intricate to cut with a coping saw. Materials used (e.g.) acrylic, wood
  4. Band facer
    Used for smoothing rough edges on wood
  5. Pillar drill
    Used for drilling precise holes in a range of materials.
  6. try square
    Used to draw straight lines or to draw an accurate 90Ā° right angle
  7. Marking gauge
    Used in metalworking or woodworking to mark out lines for purposes like accurate cutting.Image Upload 1
  8. Hot wire strip heater
    • It is a machine with a strip of wire that heats materials like acrylic so that they become malleable without becoming warped or start to bubble.
    • Image Upload 2
  9. hammer
    Used for nailing in panel pins precisely.
  10. Sand paper
    Used, when rubbed hard against the material, to wear away rough surfaces.
  11. liquid solvent cement
    This welds thermoplastic sheets or pipes together by softening the surface of the material being bonded
  12. PVA glue
    Used to stiffly secure panels of wood together by gluing them
  13. Soldering iron
    Uses SOLDER (an alloy of tin and lead) and melts this onto a PCB to secure electrical components to it.
  14. Wire strippers
    These strips the plastic tubing off an electrical wire so that the joining of the component to the PCB is more efficient and easy.
  15. Pliers
    Used mainly for cutting wire
  16. name the 2 types of plastic:
    Thermosetting plastics and thermoplastics
  17. THERMOPLASTICS
    • Can be reshaped by heat
    • Used for rulers, aerosol tops, wrappers etc
    • Colourful
  18. THERMOSETTING PLASTICS
    • Can chip or crack when dropped
    • Can't be reshaped
    • Generally strong and heat resistant
  19. Explain how plastic is made.
    Oil, air, water and salt are combined and processed to create powders, resins and granules.
  20. POLYESTER RESIN (T.S.P)
    • Paperweights
    • make GRP
    • Boat hulls
  21. EPOXY RESIN (T.S.P)
    • Glues
    • waterproof wood glues
  22. ACRYLIC/ PERSPEX (T.P)
    • Record deck lids
    • Shop signs
    • Baths
    • Jewellery
  23. RIGID POLYSTYRENE (T.P)
    • Disposable cups
    • cosmetic bottles
    • tv cabinets
  24. Explain how plastics like acrylic are shaped.
    They are heated on the hot wire strip heater until they become soft, pliable and malleable and then they can be shaped in different ways into different shaped. They can be folded, bent using equipment like a former or a jig.
  25. Ferrous
    A metal that contains iron
  26. Non-ferrous
    A metal that doesn't contain iron
  27. Mild steel. Properties and uses
    • Tough
    • Ferrous
    • High tensile strength
    • Can be hardened
    • Rusts easily
    • Used commonly in schools, car bodies, nuts and bolts
  28. Copper. Properties and uses
    • Ductile
    • Non- ferrous
    • Can be beaten into shape
    • Conductor of electricity and heat
    • Used for electrical wiring, pipes, kettles and bowls.
  29. Broad leaved hardwood tree (deciduous)

    properties of its wood
    • harder than softwood
    • Trees loose their leaves
    • OAK, ELM, BEECH.
  30. Needle covered soft wood tree (conifers)
Author
taracullen
ID
320791
Card Set
Technology DT4
Description
tech dt4 yr9
Updated