Casting for Construction of Parts.

Metals and Metal Working / Machineing +

BTY: You can use hot melt glue guns to make plastic injection molded parts.

See also:

• https://www.rotometals.com/zamak-2-ingot-aluminum-4-copper-3-zinc-93-kirksite/ Kirksite is an Aluminum / Zinc alloy with a melting point of only 725'F.+
• http://www.instructables.com/id/Machinable-Wax/?ALLSTEPS Making machinable wax yourself. Apparently he is just melting Plastic Shopping Bags (HDPE or LDPE, Recycle symbol #2 or #4) into paraffin wax (4:1 wax to plastic) at 300'F. Paraffin ignites at 400'F so proper temperature control is critical. Melted wax is nasty at those temperatures if it gets on your skin, so gloves and goggles are strongly recommended. Remaining lumps removed manually or by straining and then the result poured into molds. New batches can incorporate 50 to 75 percent re-melted chips from prior batches. Eventually, the plastic starts to break down from re-heating, so continual reuse is not actually possible.
• http://www.alumilite.com/ Alumilite is a nice light plastic that has excellent strength to weight characteristics.+
• http://www.mcmanis.com/chuck/robotics/projects/casting/index.html Some examples of alumilite use.+
• http://www.buildyouridea.com/foundry.html This guy has really nailed the casting of parts from CNC cut foam blanks

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