<img alt="" src="https://secure.hims1nice.com/150891.png" style="display:none;">

Green Sand Metalcasting Foundry News

"U" - Glossary of Foundry Additives (Including Core Binders)

Posted by Hill and Griffith Company on Aug 14, 2018 12:59:00 PM

U - Foundry Additives Glossary

UFFA TYPE RESINS (See: HOT BOX RESINS-RESINS)
Are resins of a special type commonly used as binders having different setting times, cold-set strengths, hot cured strengths and setting properties.

UNMODIFIED UREA FORMALDEHYDE (See: RESINS-UREA) 
Unmodified UF resins, catalyzed, are difficult to control in setting time when used as cold-set resins. Their cold-set strength is medium, but they have a high hot-cured strength. They have poor setting properties and are sensitive to mold-metal reactions, unless a proper coating is given the sand surface.

UREA BINDER (See: LIQUID UREA BINDER)

UREA FORMALDEHYDE CATALYZED (See: UREA RESIN) 
When urea resins are catalyzed, they start to cure immediately when used. This can be a bench life problem. The higher the temperature, the faster the curing process.

Read More

Tags: Metal Casting, Green Sand Casting Products, Green Sand Foundry Supply, foundry supply, metal casting supplies, foundry supplies, green sand casting, Green Sand Metal Casting, Green Sand System, green sand metalcasting, core binders, Foundry Additives Glossary, Green Sand Additive Products, Green Sand Foundry Supplies

"T" - Glossary of Foundry Additives (Including Core Oils)

Posted by Hill and Griffith Company on Aug 7, 2018 4:21:00 PM

T - Foundry Additives Glossary

TALC (See: SOAPSTONE)
Talc is a hydrated magnesium silicate with the composition [4SiO2 3MgO • H2O]. It is a soft, friable mineral having an oily touch. It has a Moh's hardness of 1 and a specific gravity of 2.8. It is referred to as "soapstone." It is used as a parting compound when impregnated with wax and ground. It has been used in nonferrous mold coatings, ladle refractory coatings, and when blended with clay, bentonite, cereal or dextrin, it is used as a core paste. It is used as an additive in various core compounds and core fillers.

TANNIC ACID (See: BINDERS-CORE BINDERS)
Is prepared from extraction of the liquid squeezed from wetted oak bark. It is rarely, but sometimes used as an auxiliary binder in core sand mixtures where clay is present.  

Read More

Tags: Metal Casting, Green Sand Casting Products, Green Sand Foundry Supply, foundry supply, metal casting supplies, foundry supplies, green sand casting, Green Sand Metal Casting, Green Sand System, green sand metalcasting, Foundry Additives Glossary, Green Sand Additive Products, Green Sand Foundry Supplies, Core Oils, core oil

Happy 5th Anniversary!

Posted by Hill and Griffith Company on Jul 31, 2018 1:20:57 PM

On behalf of all of your colleagues here at at The Hill and Griffith Company. We would like to wish you, Donna Nijak a Happy 5th Year Work Anniversary!

Vice President Sales & Operations, Mike Lawry congratulates Donna Nijak, Plant Manager Indianapolis Facility, on her 5th Anniversary with The Hill and Griffith Company.

Read More

Tags: Metal Casting, Green Sand Casting Products, Green Sand Foundry Supply, foundry supply, metal casting supplies, foundry supplies, green sand casting, Green Sand Metal Casting, Green Sand System, green sand metalcasting, Foundry Additives Glossary, Green Sand Foundry Supplies

"S" - Glossary of Foundry Additives (Including Southern (calcium) Bentonite)

Posted by Hill and Griffith Company on Jul 25, 2018 3:32:50 PM

S - Foundry Additives Glossary

SAFFLOWER OIL (See: CORE OIL - OILS)
This oil is not as popular as other plant oils used in core oil formulas. Safflower is a plant native to the East Indies, Asia, and Egypt. The oil is pressed from the seeds of the plant. It is used sparingly in foundry core oils.

SAL SODA (See: SODA ASH) SALT
The common name for sodium chloride is "salt." The mineral name is "halite." Its chemical formula is (NaCl). It is used in the foundry to harden core and mold coatings so as to give a glaze to mold and core surfaces. Salt is used to glaze refractories such as ladles, linings, and as an addition to clays and other clay-like minerals to lessen their viscosity when used with water slurries. The Moh's hardness of salt is very low, only 2.5. Its specific gravity is 2.1 to 2.6. It has a melting point of 1472° F. (800 ° C.). Expendable cores are made from salt brines for use as cores in casting light metal, such as aluminum. Wonderful results have been obtained with the use of salt cores. Salt brines are used in the quenching of metals. Salt has a world-wide use, but it is not commonly used in sand mixtures of the foundry.

SAND (See: FOUNDRY SAND - MOLDING SAND)
Sand is a specific particle size of grains, rocks, or minerals. Sand is a size, not a mineral. It is formed in nature by winds, water action, and other elements of the weather. Sand composes much of the earth's surface. The most useful and commercial sand found for use in the foundry is silica, but other materials such as zircon, chromite, olivine, silicon carbide, or ceramic materials may be called "sand," if they are of that "size." There are more sand foundries in the United States than those casting by any other process. Metal cast into sand molds comprises 96% of the total foundry industry. Die casting into metal molds represents about 3%. All other methods account for the balance of 1%. Silica sand is perhaps the best known sand used in the foundry for making molds, cores and refractories, but there are many minerals used as "foundry sand." (Also See: CHAMOTTE-CHROMITE-FOUNDRY SAND-HEVI-SAND­MOLDING SAND-NATURALLY BONDED SAND-OLIVINE -SILICA-SILICA SAND-SILICON CARBIDE-SYNTHETIC SAND-TENNESSEE SAND-ZIRCON SAND.)

Read More

Tags: Metal Casting, Green Sand Casting Products, Green Sand Foundry Supply, foundry supply, metal casting supplies, foundry supplies, green sand casting, Green Sand Metal Casting, Green Sand System, green sand metalcasting, Foundry Additives Glossary, Green Sand Additive Products, Green Sand Foundry Supplies, Southern (calcium) bentonite

Green Sand Casting Process in Fine Art Education

Posted by Hill and Griffith Company on Jul 17, 2018 7:47:21 AM

Introduction for Sand Casting Process in the Foundry at Camberwell College of Art London.

Introduction for Sand Casting Process with Philip White and Jenny Dunseath in the foundry at Camberwell College of Art London. Video by Chris Follows part of the Process Arts Project.

Read More

Tags: Metal Casting, Green Sand Casting Products, Green Sand Foundry Supply, foundry supply, metal casting supplies, foundry supplies, green sand casting, Green Sand Metal Casting, Green Sand System, green sand metalcasting, Green Sand Foundry Supplies

See the Green Sand Casting Process

Posted by Hill and Griffith Company on Jul 10, 2018 6:47:43 PM

Green Sand Casting Your Product, from Reliance FoundrySurrey, British Columbia, Canada

A man dressed in a silver protective suit pours red-hot metal into a mold

This foundry worker pours molten metal into a sprue during sand casting. Although there are many types of metal casting, sand casting is by far the most commonly-used type.

The process sounds deceptively simple. A replica of the desired metal item is pushed into foundry sand, where it creates a hollow “negative” of the object. That void is filled with molten metal, capturing its details. When the void cools, the metal object is pulled from the sand, with the original design faithfully captured.

Anyone who has built a complex sandcastle or sand sculpture has some experience with how sand can be good at capturing small designs. As well as being pliable, sand is inexpensive and resilient in the high heat conditions necessary for metal casting.

Read More

Tags: Metal Casting, Green Sand Casting Products, Green Sand Foundry Supply, foundry supply, metal casting supplies, foundry supplies, green sand casting, Green Sand Metal Casting, Green Sand System, green sand metalcasting, Foundry Additives Glossary, Green Sand Foundry Supplies

"R" - Glossary of Foundry Additives

Posted by Hill and Griffith Company on Jul 3, 2018 9:58:52 AM

R - Foundry Additives Glossary

RED OIL (See: OLEIC ACID)

REFRACTORIES
Any substance which resists high temperatures is called a refrac­tory. They are generally used for lining melting furnaces, pouring ladles and metal pots. Clay minerals are the oldest and most commonly used refractories. Natural refractories are ceramic materials such as fire clay, bauxite, ball clay, kaolin, zircon, silica, chromite-spinel, olivine, magnesite, and hundreds of others. Refractories are usually classified as being acid, basic, or neutral. The silica refractories are called "acid," the "basic" refractories are magnesite, dolomite and a few others. The "neutral" refractories are chromites, graphite and alumina. A product is not considered "refractory" unless it withstands at least 2806°F (1541°C). High grade refractory materials should withstand at least 3100°F. (1700°C.) and should resist slag, metallic oxide and chemical attacks. Refractories are prominently used in the foundry industry in every operation where heat is applied.

RELEASE AGENTS (See: PARTING COMPOUNDS-POWDER RELEASE AGENT)
Kerosene and light oils containing waxes are used as release agents with most green sand mixtures. Silicone type release agents appear to be very effective for use with furan no-bake binder mixtures, hot box and shell applications. There are many commercial types and grades. 

Read More

Tags: Metal Casting, Green Sand Casting Products, Green Sand Foundry Supply, foundry supply, metal casting supplies, foundry supplies, green sand casting, Green Sand Metal Casting, Green Sand System, green sand metalcasting, Foundry Additives Glossary, Green Sand Additive Products, Green Sand Foundry Supplies

"Q" - Glossary of Foundry Additives

Posted by Hill and Griffith Company on Jun 26, 2018 4:34:38 PM

Q - Foundry Additives Glossary

QUARTZ (See: MOLDING SAND-QUARTZITE-SAND-SILICA FLOUR-SILICA SAND)
Is widely deposited and is the most common variety of the min­eral, silica ( SiO2). Most quartz deposits contain impurities. It usually crystallizes in hexagonal prisms, or hexagonal pyramids. Its specific gravity is 2.65. It has a Moh's hardness of 7. Quartz is so widely used in the foundry that it is a basic aggregate.

QUARTZITE (See: GANISTER-QUARTZ-SAND-SILICA)
Is a massive group of quartz grains cemented together by water, silica gel, and pressure. Most quartzites contain angular grains of silica. Quartzite is said to have been derived from sandstones under intense metamorphism. It is a refractory, as it has a melting point of 3092°F. (1700°C.) when it is in the pure state. Foreign contaminants lower its refractory value and its commercial foundry value. It is widely used in the foundry industry, not only for the base sand in molding and core making, but for various refractory purposes in lining furnaces, ladles and other uses. 

Read More

Tags: Metal Casting, Green Sand Casting Products, Green Sand Foundry Supply, foundry supply, metal casting supplies, foundry supplies, green sand casting, Green Sand Metal Casting, Green Sand System, green sand metalcasting, Foundry Additives Glossary, Green Sand Additive Products, Green Sand Foundry Supplies

"P" - Glossary of Foundry Additives (including Liquid Parting Products)

Posted by Hill and Griffith Company on Jun 20, 2018 9:39:30 AM

P - Foundry Additives Glossary

PANTHER CREEK (See: BENTONITE-BONDS-CLAY-SOUTH­ERN BENTONITE)

PARAFFIN (See: WAX)
It is one of the waxes used for making wax patterns in the "Lost Wax Process." It is used as a release agent for liquid partings when it is dissolved in a liquid carrier such as kerosene. (See: PARAFFIN OIL.)

PARAFFIN OIL (See: OILS)
This is the drip oil from the wax presses in processing an extracted paraffin wax from the wax bearing distillate in the refining of petroleum. The oil is treated, redistilled, and separated into various grades of lubricating oils varying from light to heavy. They may be treated and bleached with sulfuric acid, or neutralized with an alkali. They may be bleached with acid. The specific gravity of paraffin oil varies between 21° and 26° Baume. Paraffin oil is used in many liquid foundry parting compounds when blended with kerosene, which is used as the carrier oil. It is usually soluble in ether, benzene and essential oils.

PARTING COMPOUND (See: AGATE-DRY PARTING-FUEL OIL-KEROSENE-LIQUID PARTING-LYCOPODIUM­ MICA-MINERAL FLOUR-PARAFFIN OIL-PARTING RELEASE AGENT-SOAPSTONE-TALC-WAX)
Materials used to separate patterns from the molding or core sand mixtures. Parting compounds may be dry parting dusted or sprayed as a liquid parting onto the patterns or core boxes so as to prevent any mold or core adherence.

PARTINGS (See: DRY PARTING-LIME-LIQUID PARTING­-LYCOPODIUM-MICA-MINERAL FLOUR-PARTING COMPOUND-TALC) 

Read More

Tags: Metal Casting, Green Sand Casting Products, Green Sand Foundry Supply, foundry supply, metal casting supplies, foundry supplies, green sand casting, Green Sand Metal Casting, Green Sand System, green sand metalcasting, Foundry Additives Glossary, Green Sand Additive Products, Green Sand Foundry Supplies, Core Oils

Mike Rowe on when to Pursue Trades, Passion and Opportunity

Posted by John Hitch on Jun 12, 2018 4:48:03 PM

For the host of several shows that add a positive luster to rugged industrial work, America’s $1 trillion in student loans and 6 million open jobs doesn’t add up. He explains how it happened and how to fix it.

Read More

Tags: Metal Casting, Green Sand Casting Products, Green Sand Foundry Supply, foundry supply, metal casting supplies, foundry supplies, green sand casting, Green Sand Metal Casting, Green Sand System, green sand metalcasting, Foundry Additives Glossary, Green Sand Foundry Supplies

Subscribe to the Green Sand Metal Casting News

Recent Metalcasting News

Follow us

Metalcasting News Categories

see all