Breaking new barriers in solutions to porosity

Over the last 30 years Ultraseal has focused on ground breaking solutions to the ubiquitous problem of porosity in castings. This experience and knowledge has resulted in Ultraseal being recognised as the world leader in providing turn-key solutions through both equipment and sealant to a global customer base.By specialising on vacuum impregnation technology and associated processes and specifically focusing on the needs of its customers, Ultraseal is able to offer a wide range of services and products in the general field of fluid technology. The experience and knowledge that has been gained through combining mechanical and chemical engineering has enabled us to offer innovative solutions to the needs of industry.

Quality & Efficiency
With the relentless drive towards greater quality and efficiency, suppliers must continue to enhance their product range and develop innovative solutions to meet client demands.Ultraseal International has always been at the forefront of innovation in impregnation technology. Its success in researching and developing high-quality sealants is demonstrated by its strategic global partnership with leading companies across a diverse range of industry sectors.Ultraseal International maintains total control of the production and quality assurance processes by having all the resources from research and development through to manufacture and despatch at one centrally located site.The company is responsive to ever-changing legislative and environmental considerations, is registered to BS EN ISO 9001:2000, and is committed to achieving the highest global quality standards.

On-site Laboratory
An extensive on-site laboratory at Ultraseal’s UK headquarters performs two key functions: firstly, quality checks on raw materials as well as monitoring production (in addition to testing samples of customer’s sealants when required). Secondly, it concentrates on research and development work crucial to the implementation of new products to meet future requirements, and to maintaining Ultraseal’s world-leading position in the impregnation industry.

Research
Ultraseal’s research and development programme is supported by major universities in the UK who specialise in the filed. This synergic relationship brings together the combined resources of both parties, involving the theory and practical experience necessary for effective development. The results of these studies are invaluable tools, not only in the development of the next generation of sealants but also in fully exploring the future requirements of process equipment.

Ultraseal International: Providing Synergy to the IndustryFew companies worldwide can match Ultraseal’s experience and expertise in both machinery and sealant technology and it is this unique marriage which is not only maintaining, but enhancing the company’s position as a partner to household name global players in the automotive, aerospace and general manufacturing sectors.Backed by highly responsive, worldwide service support, and with a dedication to customer satisfaction second to none, Ultraseal’s position as the world’s leading provider of impregnation solutions remains unchallenged.

What can Ultraseal offer?
Equipment from simple top-load to sophisticated systems
Productivity through automation
Sealant and associated chemicals
Conversion packages for existing equipment
Engineering expertise
Product training
Process Knowledge
Laboratory support
After-sales back-up
A complete turnkey solution!

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Porosity
Porosity is a measure of the void spaces in a material, and is measured as a fraction, between 0–1, or as a percentage between 0–100%. The term porosity is used in multiple fields including manufacturing, earth sciences and construction.
Contents
1 Porosity in earth sciences and construction
1.1 Porosity and hydraulic conductivity
1.2 Sorting and porosity
1.3 Porosity of rocks
1.4 Porosity of soil
1.5 Types of geologic porosities
2 Measuring porosity
3 See also
4 References

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Foundry

A foundry is a factory which produces metal castings from either ferrous or non-ferrous alloys. Metals are turned into parts by melting the metal into a liquid, pouring the metal in a mold, and then removing the mold material or casting. The most common metal alloys produced are aluminum and cast iron. However, other metals, such as steel, magnesium, copper, tin, and zinc, can be processed.

The people who work in the foundry making molds and pouring castings traditionally worked moving sand extensively, and thus were affectionately called sandrats.

Contents

1 Melting
1.1 Furnace
2 Molding
3 Pouring
4 Shakeout
5 Degating
6 Surface Cleaning
7 Finishing
8 Advantages
9 References
10 See also
11 External links
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Sand molded casting

A sand casting is a cast part, which is produced by forming a mold out of a sand mixture and pouring a casting liquid (often molten metal) into the mold. The mold is then air-cooled until the metal solidifies, and the mold is removed. Sand Casting is basically done in these steps:
1. Place a pattern in sand to create a mold2. Incorporate a gating system3. Remove the pattern4. Fill the mold cavity with molten metal5. Allow the metal to cool6. Break away the sand mold and remove the casting.

There are two main types of sand molding. "Green sand" is a mixture of silica sand, clay, moisture and some other additives. The "Air set" method uses dry sand that is bonded to other materials other than moist clay, using a fast curing adhesive. When these chemicals are used, they are collectively called "air set" sand castings to distinguish these from "green sand" castings. Many chemicals and mixtures have been designed for this use. Two general sand types are Natural bonded (bank sand) and synthetic (lake sand). And because synthetic sand's composition is more controllable it is preferred.

With both methods, the sand mixture is packed around a master "pattern" in order to form a mold cavity. If necessary, a temporary plug is placed to form a channel for pouring the fluid to be molded. Air-set molds often form a two-part mold having a top and bottom. The sand mixture is tamped-down as it is added, and the final mold assembly is sometimes vibrated in order to compact the sand and fill any unwanted voids in the mold. Then the pattern is withdrawn along with the channel plug.

Then the casting liquid (typically hot molten metal) is poured into the mold cavity left by the pattern. After the metal has solidified and cooled, the casting is separated from the sand mold. The mold is often designed to be single-use. There is typically no mold release agent, and the mold is generally destroyed in the removal process.[1]

The accuracy of the casting is limited by the type of sand and the molding process. Sand castings made from coarse green sand impart a rough texture on the surface of the casting, and this makes them easy to recognize. Air-set molds can produce castings with much smoother surfaces. Surfaces can also be ground and polished, for example when making a large bell.

After molding, the casting is covered in a residue of oxides, silicates and other compounds. This residue can be removed by various means, such as grinding, or shot blasting.

During casting, some of the components of the sand mixture are lost in the thermal casting process. Green sand can be reused after adjusting its composition to replenish the lost moisture and additives. The pattern itself can be reused indefinitely to produce new sand molds. The sand molding process has been used for many centuries to produce castings manually. Since 1950, partially-automated casting processes have been developed for production lines.

Contents
1 Simple manual sand casting process
1.1 Patterns
1.2 Molding box and materials
1.3 Chills
1.4 Cores
1.5 Design requirements
2 Types of Sand Castings
2.1 Green Sand
2.2 Cold Box
2.3 No Bake Molds
3 Essential improvements of the foundry technology
4 Fast molding & sand casting processes
4.1 Mechanized sand molding
4.2 Automatic high pressure sand molding lines
4.2.1 Horizontal sand flask molding
4.2.2 Vertical sand flaskless molding
4.2.3 Matchplate sand molding
5 Decorative use of wood patterns
6 Alternative casting methods
7 See also
8 References
9 External links
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FOUNDRY SAND
Material Description
ORIGIN Foundry sand consists primarily of clean, uniformly sized, high-quality silica sand or lake sand that is bonded to form molds for ferrous (iron and steel) and nonferrous (copper, aluminum, brass) metal castings. Although these sands are clean prior to use, after casting they may contain Ferrous (iron and steel) industries account for approximately 95 percent of foundry sand used for castings. The automotive industry and its parts suppliers are the major generators of foundry sand.

The most common casting process used in the foundry industry is the sand cast system. Virtually all sand cast molds for ferrous castings are of the green sand type. Green sand consists of high-quality silica sand, about 10 percent bentonite clay (as the binder), 2 to 5 percent water and about 5 percent sea coal (a carbonaceous mold additive to improve casting finish). The type of metal being cast determines which additives and what gradation of sand is used.

The green sand used in the process constitutes upwards of 90 percent of the molding materials used.(1)

In addition to green sand molds, chemically bonded sand cast systems are also used. These systems involve the use of one or more organic binders (usually proprietary) in conjunction with catalysts and different hardening/setting procedures. Foundry sand makes up about 97 percent of this mixture. Chemically bonded systems are most often used for “cores” (used to produce cavities that are not practical to produce by normal molding operations) and for molds for nonferrous castings.

The annual generation of foundry waste (including dust and spent foundry sand) in the United States is believed to range from 9 to 13.6 million metric tons (10 to 15 million tons).(2) Typically, about 1 ton of foundry sand is required for each ton of iron or steel casting produced.

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