Molding sand, also known as foundry sand, is a sand that when moistened and compressed or oiled or heated tends to pack well and hold its shape. It is used in the process of sand casting for preparing the mould cavity. Green sand. Green sand is an aggregate of sand, bentonite clay, pulverized coal and water.
What is Foundry Sand? • Foundry sand is a high-quality uniform silica sand that is used to make molds and cores for ferrous and nonferrous metal castings. • Foundry sands typically comprise of >80% high-quality silica sand, 5-10% bentoniteclay, 2 to 5% water and less than 5% sea coal.
Apr 16, 2014· Oil sand is messy and can be problematic with bronze. I had to look a long time for someone to take it off my hands as I did not want it in the land-fill. I have visited a foundry in Idaho which does mostly silicon bronze door hardware every day, fascinating!
Because the sand has almost perfect adhesion qualities, it is used for high-precision mould making. Also, unlike cheaper sand made up using water, it poses no risk of explosion when suddenly exposed to hot metal. Petrobond can easily be used on a small scale for casting anything from pewter to aluminium. Qty: 1kg.
Jun 23, 2013· I received a 50# bag of Halliburton brand Petro Bond II a few days ago and here is how I mixed it without using a muller. At this point, I don't yet have a muller so I wanted to see if one was ...
Jul 30, 2017· Comparing my old petrobond foundry sand to a new batch that I just purchased. Both the old and new sand was purchased from the same supplier. Please consider supporting this channel by becoming a ...
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For foundry purposes without the use of water. Mix consists of a mulled mixture of fine sand, Petrobond, oil and a small amount of catalyst. Produces a finish to your castings that far exceeds that produced when using Albany sand. Mixed with oil. 50 lbs.
May 19, 2019· Back in the 70's I joined a Night School Foundry class at the school where I taught Physics. There were two shop rooms, one green sand, the other Petro Bond sand. We first did only green sand, and then near the end switched to the Petro Bond room, wow, the difference was quit noticeable.
Molding Sand Additives Brochure. TECHNICAL SERVICES. Our sand and bentonite laboratory facilities are staffed with a team of highly qualified engineers and technicians. Our USA testing facilities offer extensive product testing and research capabilities that allow us to better support our customers and assist them in meeting their competitive ...
Our "Petro Bond" green sand mold processing assures consistent mold compaction producing exceptional cast surface finishes and aesthetic qual ite . In addition, our surface finish provides a superior base for secondary processing such as powder coating, plating, anodizing, zinc plating or traditional wet painting.
Jun 15, 2004· The sand gets powdery after it sits and it is best to mull it or warm it before use. When green strength starts to fade, add in some alcohol.----- Sand: F110 from US Silica My cost per pound $0.21 $8.95 / 100 lbs. from Abrasives & Equipment of Atlanta This is an excellent foundry sand. You should try to get it.
Molding Sand. Molding sand is more than just sand. Typically it is a fine grade of sand (mine is 110 grit sand blasting sand), clay binder and something to moisten it. There are two types of molding sand of interest to the casting hobby. Water bonded sand. Water bonded sand or Green Sand has
Petrobond Oil Sand 25Kg for metal casting. Petrobond sand has a special oil binder instead of bentonite clay and water as used in traditional greensand. No steam is generated when the metal is poured. This means that there is a reduced need for venting of the mold and the sand doesn't need to be as permeable.
Supplying Professional Quality Foundry Products & Green Sand for Micro-Foundries, Hobby and Backyard Metal Casting Enthusiasts. We also do one-off castings and small production runs in Aluminium and Bronze for artists, inventors and designers. We have been doing metal casting since 2001 and started out using Petrobond Sand.
Apr 25, 2010· PETRO BOND sand may be used as a facing for tion. The mix may be added as a facing or blend- green sand molds. When PETRO BOND sand is ed into the heap in order to ensure a constant blend of used as a facing, the burned sand readily mixes old and new material.
K-Bond is named for Kent State where it was developed by one of Tom Cobett's Students. It is an almost smokless oil bonded foundry sand for casting zinc, aluminum, brass, bronze and iron. On this page you will find the receipe along with some dos and donts.
Mar 25, 2014· I tumbled the mix dry first so the sand particles would coat then tempered it with water. This works fine for brass and bronze - it also gets better with use after it's mulled a few times. If you still want Petrobond, get a copy of "Metal Casting: A Sand Casting Manual For The Small Foundry" by Chastain (volume 1 has the Petrobond recipe).
– Petrobond is a formulated bonding agent, bonding sand with oil instead of water – Less gas is formed permitting use of finer sands with lower permeability. Petrobond gives a finer finish. – Petrobond produces near die cast quality casting with green sand practice. – Petrobond is ideal for limited run or one-of-a-kind casting.
When I make an impression into petrobond I have to be very delicate in pulling it out otherwise it messes up a lot. I personally find delft clay to be a much better product. Don't get me wrong, petrobond is still good. Bottom line, petrobond is ok for open pour design, but for closed casting I recommend Delft.
Apr 25, 2010· Petro Bond foundry molding sand ... bonding sand with oil instead of water. A PETRO BOND sand consists of a mulled mixture of sand, oil, PETRO BOND bonding agent, and a small amount of P-l Catalyst'. ... Petro Bond Foundry Sand Brochure Hobby Foundry…