When you quenched the part I wondered if you know that you still have to go through a heat cycle to harden the part. Then a couple of seconds later you have the shot of the part in the oven. And I thought, "Someone who knows what he is doing".
@pakster98792 жыл бұрын
very informative video, thanks a lot Olli !
@valic0002 жыл бұрын
Very nice Olli! Very clever with the plate to have split the casting in half. I usually make a 2 part pattern, but that is more work of course. Great idea! The finish is very nice!! Compliments Olli!!
@OlliKarhun
2 жыл бұрын
Thank you Peter! I made the pattern first and learned after that that many use split pattern 🙈 Luckily the split plate works nicely, ofcourse it is a bit of a chore to make one but the copy of a drawing got me close and then a lot of filing was involved.
@kencroft7933
2 жыл бұрын
@@OlliKarhun I always used match-plate patterns and I made a fixture to withdraw the pattern without disturbing the sand. Basically I copied the method used by the late Gerald Smith as described in the article he wrote for some model engineering magazine years ago.
@OlliKarhun
2 жыл бұрын
@@kencroft7933 thanks for the info Ken. That would definately be an interesting article to read!
@jirvin4505
Жыл бұрын
Yes it would be interesting to read the Gerald Smith article
@ixb12 жыл бұрын
It looks just perfect!
@anuarabdulsamad268815 күн бұрын
no core insert..?
@erickgalaz55852 жыл бұрын
Greetings sir... what type of aluminum have you used for the monoblock? Is it conventional aluminum scrap from windows or aluminum scrap from car/motorcycle pistons? What degasser have you used? ...I'm his fan, also of Valic and Rodrio Castellanos
@OlliKarhun
2 жыл бұрын
Hello Erik, I did use AlSi12 aluminium that I got from the local foundry and I did use nitral c 19 for degassing of the melt. Degasser with a preheated bell plunger at about 780 and right after that a drossing flux and scoop it off the top of the melt. Then measure temp again and start pour at 650-675. Last pour I started at around 630 as the melt had cooled off a bit more than I wanted but that worked also fine.
@erickgalaz5585
2 жыл бұрын
@@OlliKarhun ...I really appreciate your answer, and your advice. I hope soon to be able to achieve some castings, at the moment I have (still unfinished) the patterns of a Nova and Deezil in mdf and wood, and a Satelitt (David Andersen 1cc) in 3D plastic. But first I'll try a base for engine tests.
Пікірлер: 12
When you quenched the part I wondered if you know that you still have to go through a heat cycle to harden the part. Then a couple of seconds later you have the shot of the part in the oven. And I thought, "Someone who knows what he is doing".
very informative video, thanks a lot Olli !
Very nice Olli! Very clever with the plate to have split the casting in half. I usually make a 2 part pattern, but that is more work of course. Great idea! The finish is very nice!! Compliments Olli!!
@OlliKarhun
2 жыл бұрын
Thank you Peter! I made the pattern first and learned after that that many use split pattern 🙈 Luckily the split plate works nicely, ofcourse it is a bit of a chore to make one but the copy of a drawing got me close and then a lot of filing was involved.
@kencroft7933
2 жыл бұрын
@@OlliKarhun I always used match-plate patterns and I made a fixture to withdraw the pattern without disturbing the sand. Basically I copied the method used by the late Gerald Smith as described in the article he wrote for some model engineering magazine years ago.
@OlliKarhun
2 жыл бұрын
@@kencroft7933 thanks for the info Ken. That would definately be an interesting article to read!
@jirvin4505
Жыл бұрын
Yes it would be interesting to read the Gerald Smith article
It looks just perfect!
no core insert..?
Greetings sir... what type of aluminum have you used for the monoblock? Is it conventional aluminum scrap from windows or aluminum scrap from car/motorcycle pistons? What degasser have you used? ...I'm his fan, also of Valic and Rodrio Castellanos
@OlliKarhun
2 жыл бұрын
Hello Erik, I did use AlSi12 aluminium that I got from the local foundry and I did use nitral c 19 for degassing of the melt. Degasser with a preheated bell plunger at about 780 and right after that a drossing flux and scoop it off the top of the melt. Then measure temp again and start pour at 650-675. Last pour I started at around 630 as the melt had cooled off a bit more than I wanted but that worked also fine.
@erickgalaz5585
2 жыл бұрын
@@OlliKarhun ...I really appreciate your answer, and your advice. I hope soon to be able to achieve some castings, at the moment I have (still unfinished) the patterns of a Nova and Deezil in mdf and wood, and a Satelitt (David Andersen 1cc) in 3D plastic. But first I'll try a base for engine tests.