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Tools/castingcrucible/induction: Difference between revisions
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Line 30:
* What are Sprus, Gates and Risers and why you need each of them
* Design them into the mold, or cut them afterwards once you've made the sand form
* The possibility of designing, 3D printing, Casting and then finishing on the [[Tools/boxford|Boxford CNC Mill]].
* Printing out a mold, carving a mold from wood, high surface finish needed
Line 38:
* Using the dry sand for safety
* Getting out the crucible and setting it up in the casting tray
* Selecting which crucible to use - Aluminium reside in the default crucible
* Choosing your metal and checking it over carefully
* Keeping the gas bottle well away from the burners
* Mounting the regulator
** Left-hand thread on the regulator
** Do not use PTFE tape on the thread
* Burners are self-lighting and have auto-shutoff
** Turn the blower on first and off last
* Selecting suitable metal
** Reused old castings are cheapest, but have increased risk of voids, porosity and poor strength
Line 92 ⟶ 97:
* This means that before metal goes into the crucible it must be pre-warmed around the outside of the forge, and then only added in small amounts so it doesn't radically cool the crucible. Little and often is the way to add metal.
* Additions must be made carefully to avoid splashing.
* The maximum capacity of the crucible is about 3Kg of aluminium, or 10Kg of copper. That equates to the crucible being about 75% full. This is approx 1.5l of liquid metal.
Making the Pour
Line 164 ⟶ 169:
* Sweeping up everything
* Putting the casting tray back
* Returning
* Dust masks to bin, they cannot be re-used
* Re-order any PPE that was damaged
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