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Al Metal Casting: Tips for Making Good & BIG ones at home!

23 tips that have really helped to improve the quality of the parts we can cast with molten aluminum, from our home furnace. In the process, we make a large casting for the CNC machine we have been building. The next video, where we turn this casting into a precise part for the Z axis is here:    • PRECISION the easy way, making CNC pa...   If you got something out of this and would like to show Sam and me some love, go here https://ko-fi.com/floweringelbow and shout us a coffee or buy the 3D model of the CNC or our metalized epoxy guide. ‪@olfoundryman8418‬'s channel:    • Basin and sprue design for sand casti...   this is a good video on the pouring technique to get started, but see his others too. ‪@luckygen1001‬'s channel is also wonderfully good for all things casting related - you could start here with the video I referred to about de-gassing    • Can you degass aluminuim with carbon ...   See also this video by MetalMusings, if you are interested in de-gassing:    • Degassing aluminium with argon gas   Our video about easy heat-treatment of castings at home:    • Heat Treating Aluminium [Easy DIY met...   Andrew Martin's video about 'surge traps' aka 'spin traps'    • Foundry 44: Surge Trap, What is a Sur...   Which alloy to use for casting blog post: http://www.floweringelbow.org/which-s... 00:00 Intro to the casting project and tips. 00:27 1. Why stop making aluminium muffins? 01:30 2. How to avoid 'drop out'. 02:19 3. Ways to modify flasks. 02:50 4. 'Directional solidification' and what it means for castings. 03:47 5. Notes on parting dust. 04:20 6. Rammer tech. 04:45 7. Consider green sand 'permiability'. 05:17 8. Prepare for mistakes. 05:38 9. How to coat patterns for easy removal. 07:00 10. Why add a 'spin trap'? 07:30 11. The 'very shallow drag' strategy. 08:57 12. The use of compressed air. 09:40 13. Put handles by the pins on the cope. 10:07 14. The pouring basin. 10:40 15. Which aluminium alloy to use? 10:59 16. Vent holes 11:45 17. Why be snappy about the melt? 12:23 18. Pre-heating and why it's important. 12:40 19. Doing a 'dry run'. 13:17 20. The crucible is how full!? 13:54 21. Pouring technique. 15:16 22. The significance of relative humidity. 16:49 23. How to analyse the casting. Aluminum and Aluminum Alloys, Elwin L Rooy in ASM handbook vol.15 - http://s1.iran-mavad.com/ASM%20hanboo... AFS Transactions 2005 American Foundry Society, paper the graph was from: https://www.jetir.org/papers/JETIR210... Lets Connect! Ko-fi: Shout us a coffee: https://ko-fi.com/floweringelbow Our website: http://www.FloweringElbow.org FB:   / floweringelbow