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| Building a milling machine |
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| NormanV:
I've done a bit more today. I had to wait for a period without rain which was rather frustrating. Today I cast a part for mounting the pulleys for the drive. It is a lot lighter than most of the other parts I have cast for this machine. It is only 10mm thick. It was a bit more complicated to mould than the previous parts I have made and I was pleased how my way around it worked out. |
| NormanV:
I made the pattern in two parts, the main part being the item itself and then the separate part that fits under the main part to fill the awkward cavity underneath. I moulded it with it standing upright on the mould board and when I had rolled it over I removed the filler piece and completed packing the sand in. I rolled it back to open it leaving the cavity filling sand on the base. The sand broke away a little at the base but that is unimportant as it can be trimmed off when I tidy up the casting. |
| awemawson:
Nothing there that a bit of fetling won't sort out :thumbup: |
| NormanV:
Buoyed up by my success this morning I thought that I would do some more casting this evening even though the weather was looking a bit dodgy. I tried to be clever and cast three items in one pour. I know(?) that I cut gates between all three patterns but when I poured it seemed as if I hadn't. I got two of the castings OK but with a lot of flashing around the edges. That will teach me not to try to rush and to beat the weather! |
| vtsteam:
Nice work Norman. Kinda hard to stop casting when you're on a roll! We need parts, parts..... :dremel: |
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