Metal Casting Zone Info Blog

Doug Means asked:


When Contious Casting of steel (and probably other metals) you are interested in increasing the speed of the casting. When doing that too much, the firm shell of the steel flow becomes to thin to withstand the pressure from the still liquid core and the slab/pre-slab start to bulge. What is the term for this phenomena? I have heard the word “Moby Dick” being used, but that is to shop-floorish for my need…. Anyone?

Metal Casting Forum

Neel asked:


What products can be produced using Centrifugal technology in non-ferrous metals? Which industry uses these type of products? One eg. of non ferrous centrifugal casting parts is liners, bearing parts, bushes, etc.. which industry this is helpful.

Learn Metal Casting

sweety_atspacecase0 asked:


I want to press a small cylinder out of copper
as in make my own .22LR shell casing.
so, I realize that there is no economical reason to do this.
I have read that it is a series of progressive dies,
but what do they look like ?
how far can you take the metal each pressing ?
I could make one that would have straight walls,
but I can’t figure out how to get the edge on the outside and to make that space hollow on the inside. same thing with most of the large rifle rounds, they are big inside with a small opening in the top, are they cast ?
I have a 10 ton press to play with and I have annealed copper sheets (I know I should use brass and I have a little of that).
I am willing to make the dies, but don’t know what shape.
I looked at everything I could find in google for about 3 hours and could not find an answer.
I got reloading dies to see how they worked and they don’t push the metal around much at all
any ideas anyone ?
thank you for the bullet info it gave me some ideas,
but I was looking for the casing info, the brass part, the part with the primer in the back that holds the powder, not the bullet.

and the cases for the large rifles I could cast,
cases for a .357 I could press because it is straight walled.

rim fire 22 shells have a flared edge on the back where you hit them to set it off.

in the 1800s they had a .32 rimfire and the ammo is no longer made in quantity.

I am curious how to reproduce the .32 rimfire.
the bullet part is no problem as they are easy to cast or swage, the gun powder is easy to buy and harder to make but possible.
the brass casing is what has me perplexed.

Metal Casting Forum

kevinthenerd asked:


Assume a perfectly smooth mold.
Post processing is not a viable option, and surface finish is the ONLY requirement. Air cooling has already been shown to be insufficient.
I can cool it as quickly or as slowly as necessary. I can use anything as fast as boiling heat transfer or as slow as a gradual heater stepdown. Is slower always better? Is there a point of diminishing returns? I’m currently thinking of using 60/40 solder but may switch to plumber’s solder.
Not sure if I was clear… post processing is not an option, which means I can’t sand, sandblast, buff, polish, abrade, wax, paint, anodize, or anything else you might have in mind. None of them are practical for this application.
Everyone assumed this is injection molding. It isn’t. It’s for a process I’m inventing/improving to some extent. I believe much of the reason why spattered solder looks shiny is that it cools completely undisturbed. The process is homemade but more sophisticated than you might think. I’m choosing solder because it’s a eutectic alloy which has certain grain structure properties when cooling.

Metal Casting DIY

Ken P asked:


A. a mold damaged by excessive heat
B. an unequal cooling rate of molten metal
C. a slow cooling of the liquid metal
D. an incompatibale alloy mixture of casting metal

Metal Casting DIY

Syra asked:


How does one go about fixing a broken mold and/or pouring a mold?

What safety measures should be considered?

What should be done with a mold before you fill it with Zinc to ensure it doesn’t break?

Please keep in mind that I am an accountant, so I don’t know some technical terms.

Metal Casting

holley_heffernan asked:


I have been working with metal all my life it seems and I want to start making my own casts?
does anyone work at a foundry anymore these days or is it all done offshore?
also how did you get a job at a foundry if there is anymore left in north america

Metal Casting Zone

yaowie asked:


what is needed to produce a pattern for metal casting?
a life size bronze statue

Iron Metal Casting

SmIleY BeN asked:


Hey, I read it someone and I didn’t understand what it meant…
Metal work if that helps but I think it is actually casting than a forging but I cannot be sure… Any info would help greatly.
Cheers Ben

Metal Casting Information

odwadikwayo asked:


this process is used in metal making in the manufacturing industry.

DIY Metal Casting