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Green Sand Metalcasting Foundry News

5 Steps to Identify Green Sand Metalcasting Defects

Posted by Hill and Griffith Company on Oct 9, 2018 1:23:05 PM

The procedure of identifying, diagnosing and minimizing or eliminating crucial casting defects is important for a foundry to run in a low-cost, and high-efficiency mode.

It can disprove incorrect conventional wisdom and show that unexpected methods are actually the best way to move forward.

To do this, there are three keys to remember:

1. Focus on identifying a casting defect on the basis of its appearance.

2. Be aware of the interactive nature of foundry processes and variables.

3. Use rigorous experimental design methods to study complex causes of defects.

 

(Thanks to Green Mechanic for the image. You'll find more about metalcasting defects at their site.)

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Tags: Green Sand Casting Products, Green Sand Foundry Supply, Foundry Supply, Foundry Supplies, Green Sand System, Green Sand Metalcasting, Green Sand Metal Casting, Metal Casting, Metal Casting Supplies, Green Sand Foundry Supplies

Foundry Leadership Conference Insights, Guest Post by Doug Kurkul, AFS CEO

Posted by Doug Kurkul on Oct 2, 2018 12:12:04 PM

Metalcasters around the world face many of the same challenges. That point was articulated at the recent Foundry Leadership Conference in Amelia Island, Florida, presented by the American Foundry Society.

Moderated by AFS Vice President Peter Reich, LaempeReich, a panel on the Condition of the Global Foundry Industry also included Brad Muller, Charlotte Pipe and Foundry; Atsushi Nagai, SintoKogio; Carsten Kuhlgatz, HA International; and Denny Dotson, representing the World Foundry Organization.

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Tags: Green Sand Casting Products, Green Sand Foundry Supply, Foundry Supply, Foundry Supplies, Green Sand System, Green Sand Metalcasting, Green Sand Metal Casting, Metal Casting, Metal Casting Supplies, Green Sand Additive Products, Green Sand Foundry Supplies, American Foundry Society

The Metal Casting Foundry Holiday Gift Giving Season is Right Around The Corner

Posted by Hill and Griffith Company on Sep 26, 2018 10:52:42 AM

Here are the top ten metal casting books available in the American Foundry Society (AFS) bookstore

The AFS has compiled a list of the top 10 books purchased in the 2018 fiscal year. If you've purchased a book from AFS, thank you! If you haven't, check out what your friends in the industry are reading.

The top 10 bestsellers of 2018

1.Casting Defects Handbook: Iron & Steel

The first edition of the AFS Casting Defects Handbook was considered the go-to pocket reference for metalcasting personnel worldwide for more than 35 years. This edition has been rewritten by George Goodrich in conjunction with the American Foundry Society (AFS) Cast Iron Division and the Steel Division to provide the metalcasting industry with updates to reflect the changes in foundry technology.

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Tags: Green Sand Casting Products, Green Sand Foundry Supply, Foundry Supply, Foundry Supplies, Green Sand System, Green Sand Metalcasting, Green Sand Metal Casting, Metal Casting, Metal Casting Supplies, Green Sand Additive Products, Green Sand Foundry Supplies, Metal Casting Books

To Develop Organizational Leadership, Build a Deep Bench

Posted by Lieutenant Colonel Chad Storlie on Sep 18, 2018 2:38:32 PM

"The U.S. Army shows that commanders lead because of the skills developed and executed three levels below," Lieutenant Colonel Chad Storlie, Retired. Article in Sep 8, 2018 Foundry Management and Technology Magazine Newsletter

 

During the first six years of my U.S. Army service I had been a member of four different battalions (i.e., about 700 soldiers organized into four sub units) and two combat-arms branches. I also evaluated leaders from six different battalions, and had moved around the world and the United States. Military training had taught me that the commander, the senior officer in charge of a military organization, determined "the quality" of a unit. However, even my limited experience had taught me that the real strength of an organization is found three to four levels down from the commander: Junior leaders in any organization make an organization great, or cause its eventual failure.

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Tags: Green Sand Casting Products, Green Sand Foundry Supply, Foundry Supply, Foundry Supplies, organizational leadership

Metal Casting Foundry Industry Suppliers Association - Hill and Griffith Company Profile

Posted by Hill and Griffith Company on Sep 11, 2018 1:53:28 PM

"The August 2018 Issue of Foundry Management & Technology Magazine highlights the CISA members and the values they preserve and protect for us," Robert Brooks, Editor.

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Tags: Green Sand Casting Products, Green Sand Foundry Supply, Foundry Supply, Foundry Supplies, Green Sand System, Green Sand Metalcasting, Green Sand Metal Casting, Metal Casting, Metal Casting Supplies, Green Sand Foundry Supplies, Casting Industry Suppliers Association

"W, X, Y, Z" - Glossary of Foundry Additives (Including core oils)

Posted by Hill and Griffith Company on Sep 4, 2018 9:24:48 PM

W, X, Y, Z - Foundry Additives Glossary

WAD ORE (See: MANGANESE DIOXIDE) 

WATER GLASS (See: SODIUM SILICATE) 
"Sodium silicate," "soluble glass," and "silicate of soda" are all called "water glass." Water glass is a composition of various ratios of Na, O to SiO, in dry crystalline or hydrated form. It is used as a binder in mold and core sand mixtures. The Carbon Dioxide (C02)-Sodium Silicate Process is used by the foundry industry. When 2% to 4% sodium silicate (Water Glass) is added to a clean silica sand or a refractory sand and carbon dioxide gas is passed through this formed mold or core, it hardens into a refractory mass, making excellent cores and molds for certain castings. Sodium silicate dissolves in hot water. Sodium silicate (water glass) is made by melting sodium carbonate with silica or by applying heat and melting sodium carbonate together with sand, charcoal and soda. This product, fused sodium silicate, is then ground and dissolved in boiling water for use as a foundry binder. Sodium and potassium carbonate can also be made into a double soluble water glass. 

WATERLESS BINDERS (See: NEO-BOND)
Neo-Bond is a waterless binder which is very popular in the foundries where waterless binders are required. No temper water is necessary. Five percent (5%) by weight Neo-Bond, plus less than 2% of a high viscous coastal oil is all that is required when mulled together to form a waterless molding sand mixture. Waterless binder mixtures have produced, and are producing castings, with better detail than more expensive processes such as shell molding. Such waterless mixtures are molded "green" and are generally a low cost repetitive operation. Waterless binders, such as Neo-Bond, are used with fine silica sands, olivine, zircon, or Hevi-Sand mixtures.

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Tags: Green Sand Casting Products, Green Sand Foundry Supply, Foundry Supply, Foundry Supplies, Green Sand System, Green Sand Metalcasting, Green Sand Metal Casting, Metal Casting, Metal Casting Supplies, Foundry Additives Glossary, Green Sand Additive Products, Green Sand Foundry Supplies, Core Oil

Article Review: "How Properties Vary Throughout a Casting" from Modern Casting Magazine

Posted by Hill and Griffith Company on Aug 28, 2018 9:32:49 PM

A study set out to show how properties can vary throughout a casting and why that’s ok. 

(Introduction)

The bulk of A356 castings are poured in permanent molds with solidification times generally less than 10 minutes. This process normally provides the best metallurgical properties when compared to the other common casting processes such as high pressure die casting (traditional or vacuum), sand casting, plaster molding and investment casting. Because of these properties, the tilt poured permanent mold process is used often for high integrity parts.

Tensile strength and ductility are closely tied to metallurgical properties such as secondary dendrite spacing, the level of microporosity, and the metal cleanliness which impacts the level of inclusions.

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Tags: Green Sand Casting Products, Green Sand Foundry Supply, Foundry Supply, Foundry Supplies, Green Sand System, Green Sand Metalcasting, Green Sand Metal Casting, Metal Casting, Metal Casting Supplies, Foundry Additives Glossary, Green Sand Additive Products, Green Sand Foundry Supplies

"V" - Glossary of Foundry Additives (Including Vegetable Core Oils)

Posted by Hill and Griffith Company on Aug 21, 2018 3:51:12 PM

V - Foundry Additives Glossary

VEGETABLE OILS (See: CORE OIL-COTTONSEED OIL-LIN­SEED OIL-OILS-TUNG OIL)
These are oils obtained from plants. They are used in the foundry as drying oils, as lubricants, and for other purposes. Examples of vegetable oils are linseed oil, cottonseed oil, olive oil, palm oil, and castor oil. The chief distinction between vegetable oils and fats is physical. Oils are fluid at ordinary temperatures. Vegetable oils can be thickened by oxidation, or more simply by blowing air through them. They may be hydrogenated by passing hydrogen gas through them. in the presence of a catalyst. Foundry oils contain a large quantity of the vegetable oils sold.

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Tags: Green Sand Casting Products, Green Sand Foundry Supply, Foundry Supply, Foundry Supplies, Green Sand System, Green Sand Metalcasting, Green Sand Metal Casting, Metal Casting, Metal Casting Supplies, Foundry Additives Glossary, Green Sand Additive Products, Green Sand Foundry Supplies, Core Binders, Core Oil

"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.

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Tags: Green Sand Casting Products, Green Sand Foundry Supply, Foundry Supply, Foundry Supplies, Green Sand System, Green Sand Metalcasting, Green Sand Metal Casting, Metal Casting, Metal Casting Supplies, Foundry Additives Glossary, Green Sand Additive Products, Green Sand Foundry Supplies, Core Binders

"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.  

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Tags: Green Sand Casting Products, Green Sand Foundry Supply, Foundry Supply, Foundry Supplies, Green Sand System, Green Sand Metalcasting, Green Sand Metal Casting, Metal Casting, Metal Casting Supplies, Foundry Additives Glossary, Green Sand Additive Products, Green Sand Foundry Supplies, Core Oil, Core Oils

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