Cast Steam
Sunday, January 17th, 2010Cast Steam
Investment Casting
Investment Casting
10 Stages of Manufacture
The Lost Wax Investment castings Process can be used for making Precision Castings in Iron, Aluminium , Copper or Aluminium Alloys and Steel investment casting.
The Investment Casting process is almost Identical for each Metal Specification.
The main benefits are Precision casting investment with closer dimensional tolerances than Sand Casting techniques and exact re-peatability
1) Construct an Aluminium Die to allow the manufacture of Waxes
2) Assemble the waxes onto a Runner or Downsprue
3) Dip assembly into a Ceramic Slurry
4) Sprinkle ( by various methods ) grains of a Refractory Material onto the assembly. Repeat 3 & 4 enough times until you have a thickness of shell to hold the molten metal.
5) Completely dry the assembly prior to inverting it and placing into a Steam Autoclave to remove the investment casting wax.
6) Place the now hollow assembly or Mould into a Firing Oven to both cure the ceramic and to preheat the mould.
7) Fill the mould with molten Steel, Iron, Copper Alloy or Aluminium.
Vibrate the Castings inside the assembly to break down the ceramic.
9) Cut the castings off the assembly, grind where required.
10) Inspect the casings prior to despatch.
Engineers or Buyers should be aware that there are many technical considerations to be added to these 10 stages. For example the contraction of Iron, Steel, Copper Alloys and Aluminium are different and these factors will have to be considered when making the Tool or Die.
Investment Casting is avaliable from Jade Trading the UK's number one supplier of lost wax investment castings
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Lionel 6 8702 Southern Crescent 4 6 4 Steam Locomotive and Tender 1977 1978 | |
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