Sand Casting with Pattern Resin

[david929190]

Is that a PINKO lathe

[grantham418]

This flask is made of 3 x 4 inch tubular steel. The cope and drag are 1 1/2 inch, for a total height of 3 inches. The sides are 1 x 1 angle with a 1/4" pin on one side and a 5/16" pin on the other. The pins are different diameter to maintain register. The are bolts with the heads cut off and tapered. I have made flasks up to 6" x 9" x 8" high. You can also use aluminum. No welding is needed.

[m3952ike]

what is the dementions of the flask and what are the handle/guides made of?

[grantham418]

The flask is steel rectangle tubing. The sand is petrobond, a commercial product available from mifco.com

[m3952ike]

what was the flask made from. also what was the sand mixture consist of.

[adv9xx]

outstanding video!

[CaptainSmog]

Hi grantham418,

I like the little hand muller in this video. What shape is the mixing blade and is there a sieve in the bottom?

Thanks.

[Bobdog6t9]

@CaptainSmog i think it just looks like one of those flour sifters used in cooking

[CaptainSmog]

@Bobdog6t9 Thanks a lot. I will try one. Interesting video

[drescher3]

Thanks for this informative and interesting video Rod!

[Whitebear329]

A search for hard pattern resin on Google comes up with all kinds of resins. Obviously you use one that cures in UV light and is water soluble. Any hint for an on line source? A part number of what you are using maybe and Mfr..

[ComputerLearner]

Question:

After you added the second half of the flask to the top, I did not understand this part. It seems that you added more sand to the second half? But then later, how did you get that circle inlet in the second half, the shaft in which later the metal gets poured into. I did not understand that part, how the second flask piece was assembled.

[Axbent]

The first flask is upside down in teh first process, then the top flask is added ontop, after the first flask is turnd upside up.

[junkymagi]

You use a piece of conduit (thin wall pipe) to remove sand. Just press it gently into the sand either on top of a flat area of the pattern or to the side of the pattern. Sand goes into the pipe then is pulled out when the pipe is pulled out, leaving a hole. You then just use a knife to make the top of the hole beveled so that it's easier to hit the hole while pouring.

[Qiqidh]

Yeah, what a great video. Simple yet very informative.

[nomuken1]

Hey im looking to start sand casting alloy wheels ........

Can anyone point me in the direction so i can learn some more?

[junkymagi]

You'll still need some good milling and turning machines to get it usable for vehicle. You wouldn't want it to be out of round, off center. Attempting that will be hard since if you get it wrong, it may shatter at high speeds.

[guitarfreakazod]

With CNC you'd have a bunch of ugly tooling paterns to real with. With small tooling, it would be slow too. Trust me.

Also, you'd never get square inside lettering corners on a CNC mill.

[ThorsgaardFoundry]

--yeah you can with the right software. Trust ME.

[guitarfreakazod]

Software dosent make square corners, tooling does ;-) Regardless of which tooliing you used, you would always be left with a inside corner radius. Nothing at all to do with software packages.

[ThorsgaardFoundry]

I was wrong. Software helps. The thing I was thinking about was that signmaking software by Vectric, I think. Nice, crisp corners cut with a V bit - of course, they're beveled....

[straker1999]

really excellent ... i am very impressed ... well done

[Hobbynut]

Great Video! I will no doubt check out the website.

[lbush1880]

Great video, very interesting!

[soverton]

Interesting video! Where do you get pattern resin?

[grantham418]

granthams dot com/Pattern/