Archive for December, 2009

need info re bronze lost wax casting process?

December 30, 2009 - 9:49 am 3 Comments


google is your friend e,g,: http://www.artworksfoundry.com/process/casting.htm

or check if your library has the book "from clay to bronze"

between investment casting and powder metalurgy, which is more economical to produce water pump impeller?

December 30, 2009 - 9:49 am 1 Comment


Investment casting. Powder metals will require a big forging press or a big autoclave to HIP it. You will get better strength with a forging or HIP but at a price.

What is the advantage of Cast Aluminium Cookware?

December 30, 2009 - 9:49 am 3 Comments

Cookware included Pot, Fry Pan, Grill Pan which is made of Die Cast Aluminium

Aluminum is a great conductor of heat. That is why many stainless steel pans have a layer of it incapsulated in their bottoms. Downside is that they are not good for tomatoe products. The acids take a toll on them.

In the centrifugal casting cylinder liner manufacturing what is the melting point of SG Iron & Gray cast iron?

December 30, 2009 - 9:49 am 1 Comment


Cast iron melts at 1275 degrees Celsius. SG irons have castability similar to that of cast iron, so I would have to say it has a similar melting point.

What kind of equipment do you need to cast your own brass shells?

December 30, 2009 - 9:49 am 3 Comments

Look, I already know that there is no brass making equipment that is meant for hand loaders. But how much would the cheapest industrial grade equipment cost?

Lots….just visit a plant or do some research on the net.

Where can I get custom glass castings or molds made?

December 30, 2009 - 9:49 am 2 Comments

I would like to know what type of glass manufacturer you would have to go to get some castings made so that you can pour melted glass in them to form shapes. Any good companies you can point me in the direction of would be appreciated.

You will need graphite or iron molds. If you are going to pour glass, you need a furnace capable of 2000F and an annealer capable of lowering the temperature slowly over several days depending on the thickness. Alternatives are pressed glass and kiln casting. Kiln casting of unique examples can be done with molds made of a 50/50 plaster and silica flour mix.
One source of graphite http://users.ticnet.com/mikefirth/glos-src.htm#EDW
other info
http://users.ticnet.com/mikefirth/what-can.htm
http://users.ticnet.com/mikefirth/molds.htm

What is easiest preparation method for casting in bronze.?

December 30, 2009 - 9:49 am 2 Comments


what do you want to prepare? If you want to prepare yourself, it is by far easiest to take a class. The necessary equipment will be available and you will be taught everything.

rapid prototyping? what material should i use for sand casting?

December 30, 2009 - 9:49 am 2 Comments

what is the best material out there to rapid prototype a part from when using it for a sand cast mold?

Maybe you should consider a rapid prototyping service.

You probably want to choose a system that produces a good prototype that has dimensional stability over time, so I’d avoid sterolithography and choose one that uses a plastic material. I’ve linked info on the various kinds of rapid prototyping available.

What is the best aluminum grade for casting a strong differential case A356 T6 or 2014 T6?

December 30, 2009 - 9:49 am 2 Comments


According to MatWeb (www.matweb.com) 2014-T6 is "used in applications requiring high strength/hardness, including elevated temperature uses."

The Brinell hardness of 2014-T6 is 135 compared to A356 T6 hardness of 70.0- 105.

The other data points show that 2014-T6 is much more robust than A356 T6.

It should be stressed that the data point information provided by MatWeb and the Aluminum Association, Inc. are NOT FOR DESIGN.

The links below are the data sheets for A356 T6 and 2014 T6 provided by MatWeb

How Do I Melt Metal Over A Fire For Metal Casting?

December 30, 2009 - 9:49 am 2 Comments

Okay, I Want to melt metal such as pop cans, aluminum foil, etc.

but I cant build a foundry in my back yard, all i can do is make a really hot fire.

I would like some helpful suggestions.

I’ve melted aluminum, zinc and copper in one of those large cast-iron backyard chimneys. I just kept adding hardwood ’til the fire was shooting out the top. (It’s about 7 feet tall) It got so hot that I had to wear a thick jacket to get near it. I used tongs to put in and replace the melting bowl. I had to wear gloves soaked in water to get within 2 feet of the opening with the tongs. Even then the water started boiling almost instantly, so I had to be quick & fling the gloves off. All of those metals were so hot they ran like water when I poured them. Is that hot enough for ya?