12. Molding and casting

Group assignment

review the safety data sheets for each of your molding and casting materials,
then make and compare test casts with each of them
compare printing vs milling molds

Individual Assignment

design a mold around the process you’ll be using,
produce it with a smooth surface finish,
and use it to cast parts
extra credit: use more then two mold parts

Materials

• machinable wax, modeling wax

  • Ferris File-A-Wax : blue

• Silicone rubber

  • MOLD STAR 31T
  • SDS

• Urethanes resin

  • SMOOTH-CAST 320
  • SDS

• So-strong

  • Color Tints for Urethane
  • 0.01% to 3% of total system weight

• Metal

  • Bismuth Based Alloy Ingot
    • 低融点合金地金（ # 138・共晶）・Pb/Cdフリー200g
    • 138 C
    • SDS_JP
  • Tin
    • 231.9 C

Safety

• ventilation
  • open windows, fans…
• protection
  • glass
  • groves
• disposal
  • finish chemicals reaction before dispose -> heat
  • dispose cups and Stir bars directly into bin
  • change groves
    • do not touch any uncovered place, chair, desk…

Endmil

Rough cut

• 1/8 inch

Finish cut

• 1/16 inch

Ref. FA2022

Design

sample

1/16_endmill

Milling

Ref. Wax milling with mods and Genmitsu PROVerXL4030_FA2022

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Last update: April 19, 2024