Graphics - First Section (qu 11)

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  • Graphics - Question 11
    • HDPE
      • High Density Polyethene
      • Used for pipes, bowls, milk crates and buckets.
      • Trade name: polythene.
      • Thermoplastics
    • Thermoplastics
    • Polystyrene (PS)
      • High density PS are good for insulation and is hard and brittle.
    • Vacuum Forming
      • Where a sheet of plastic is heated up and pressed against a mould to produce an impression of that shape.
      • Most popular material to use is polystyrene because it's cheap and easy to form.
    • 3D Printing
      • Gives designers and product development teams rapid prototyping technology.
      • CAD software sends 3D image to 3D printer and the item is 'printed' layer by layer in a range of materials.
        • Concept models can be produced easily and quickly and 3D printers offer: speed, low cost and ease of use printing process.
          • 3D Printing
            • Gives designers and product development teams rapid prototyping technology.
            • CAD software sends 3D image to 3D printer and the item is 'printed' layer by layer in a range of materials.
              • Concept models can be produced easily and quickly and 3D printers offer: speed, low cost and ease of use printing process.
      • Laser Cutting
        • Where a piece of material is cut using a laser beam - a powerful wattage laser beam produced inside the machine.
        • A series of mirrors direct the laser beam vertically up and down onto the material to be cut (called 'flying optics').
        • As the laser beam hits the material, the intense heat vaporises it - leaving a polished surface.
          • A series of mirrors direct the laser beam vertically up and down onto the material to be cut (called 'flying optics').
      • Injection Moulding
        • Where plastics can be injected into a mould to make a product shape.
        • Process:
        • 1. Plastic powder or granules are fed from the hopper into a hollow steel barrel.
          • Process:
        • 2. Heaters melt the plastic as screw moves it along towards the mould.
        • 3. Once sufficient melted plastic has been accumulated, the hydraulic system forces the plastic into the mould.
        • 4. Pressure is maintained on the mould, until it has cooled enough to be released.

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