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| Making a milling vice |
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| NormanV:
As I suspected, even though the pattern is a bit rough it moulded up OK. Here is the flask set ready for pouring. I am now waiting for the aluminium to melt. |
| vtsteam:
Good morning Norman! I meant small radiused fillets -- just a wipe of body putty on the old pattern, and chamfering the outer corner to reduce mass at the joint. The ends are pretty massive now, and even thicker at the base than the new thicker sprue and riser. My guess is that the joint will continue to stay liquid internally longer than any other part of the pour. You really hope the sprue and riser are the last to solidify so that they can feed everything else. But maybe it will work. As Bohr said, prediction is difficult, especially about the future. I hope for a good part! :thumbup: |
| NormanV:
Oh! I totally misunderstood you. The internal corners were already filleted with body putty, there were no sharp corners. I couldn't chamfer the outside corners as that is quite an important part of the base. I'm going to knock it out in a few minutes and then we will know what the outcome is. |
| NormanV:
It turned out fine. There is a little shrinkage at one end but that will be machined out. There are no cracks. The header has suffered enormous shrinkage, right back down inside the tin can. The top of it can barely seen in the second photo. |
| mattinker:
Nice to see this coming along, Casting is such a buzz! Regards, Matthew |
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