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General Knowledge - Coggle Diagram

- - - - can make bespoke products easily
      - smooth surfaces
      - very little net waste generated
      - able to mass produce products
      - rapid speed of manufacture
      - high level of accuracy
      - cheaper as doesn't involve moulds
  - - - 1) laser beam guided by a mirror traces a single layer onto the surface of a vat of liquid polymer to cure the polymer using UV light
      - 2) cured material then lowered below remaining liquid, recoating with more resin
      - 3) process is repeated again and again until structure is formed
      - 4) post curing is required to fully solidify the part
    - - medical bone implants
      - electrical discharge machining electrodes
      - nozzels for metal spraying
      - phone cases
      - automotive wheel rims
  - - - 1) uppermost layer of bed of powdered metal is loosely bonded through slight sintering by a scanned laser beam
      - 2) new layer of powder swept across the surface and the process is repeated building the model layer by layer
      - 3) when complete, porous model is infiltrated with liquid bronze which wets and is drawn into the porosity giving a fully dense product
  - - - similar to metal version
      - use oxygen laser instead
      - use ABS, nylon, investment casting wax or polycarbonate instead of metal powder
    - - versatile
      - accurate
      - fast
    - - fluid and motion control
      - housings
      - handles for power tools
      - testable circuit breaker components
      - emergency vehicle spotlight assemblies
  - - - successive deposition, bonding and laser cutting of layers of sheet materials
      - coated feed materials is fed from a roll, positioned over the model and vut to shape by a guided laser beam
      - cut profile is pressed into the model by a heated roller bonding it to the layers underneath
    - - moulding and casting patterns
      - limited test or visual models
  - - - 1) creates negative image of the layer of the part to be electrostatically on a glass plate
      - 2) mask positioned over bath of phososensitive resin and clear areas cured by exposure to UV light
      - 3) resin wiped clear leaving hardened areas intact
      - 4) wax applied to top surface to provide support to cured resin and solidified by chilling
      - 5) model then lowered by 1 layer thickness and the next layer of resin is applied for curing
      - 6) the top surface is then milled back to the required thickness and the next layer of resin is applied for curing
  - - - 1) fine stream of thermoplastic is deposited by a two axis heated extrusion head
      - 2) material is extruted and the deposited into layers (0.1mm) one at a time, starting at the base
      - 3) this builds the model vertically on a fixtureless base as successive layers adhere through thermal fusion
- - - - solid solution hardening (chemistry)
      - precipitation hardening (microstructure)
      - work hardening (microstructure)
    - - cross linking (chemistry
      - Chain branching (chemistry)
    - - components and lay up (architecture)
    - - cell structure (architecture)