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Topic: Centrifugal casting

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	Casting - Wikipedia, the free encyclopedia
		Casting is a process by which a material is introduced into a mold while it is liquid, allowed to solidify in the shape inside the mold, and then removed producing a fabricated object, part, or casing.
		Casting is a process by which a fluid melt is introduced into a mold, allowed to cool in the shape of the form, and then ejected to make a fabricated part or casing.
		Industrially, the centrifugal casting of railway wheels was an early application of the method developed by German industrial company Krupp and this capability enabled the rapid growth of the enterprise.
	en.wikipedia.org /wiki/Casting (3474 words)

	Centrifugal Casting
		Centrifugal Casting: In centrifugal casting, a permanent mold is rotated about its axis at high speeds (300 to 3000 rpm) as the molten metal is poured.
		The casting is usually a fine grain casting with a very fine-grained outer diameter, which is resistant to atmospheric corrosion, a typical situation with pipes.
		Centrifuging: Centrifuging is used for forcing metal from a central axis of the equipment into individual mold cavities that are placed on the circumference.
	www.efunda.com /processes/metal_processing/centri_casting.cfm (355 words)

	Deeco Metals - Centrifugal Casting
		Molds for copper alloy castings are usually made from carbon steel coated with a suitable refractory mold wash. Molds can be costly if ordered to custom dimensions, but the larger centrifugal foundries maintain sizeable stocks of molds in diameters ranging from a few inches to several feet.
		The inherent quality of centrifugal castings is based on the fact that most nonmetallic impurities in castings are less dense than the metal itself.
		Centrifugal castings are made in sizes ranging from approximately 2 in to 12 ft (50 nlm to 3.7 m) in diameter and from a few inches to many yards in length.
	www.deeco.net /for/centcast.htm (432 words)

	Riser (casting) - Wikipedia, the free encyclopedia
		Chvorinov's rule states that the solidification time t of molten metal is related to the constant C (which depends on the thermal properties of the mold and the material) and the local volume (V) and surface area (A) of the material, according to the relationship
		Therefore, to ensure that the casting solidifies before the riser, the ratio of the volume to the surface area of the riser should be greater than that of the casting.
		Because risers exist only to ensure the integrity of the casting, they are removed after the part has cooled, and their metal scrapped.
	en.wikipedia.org /wiki/Riser_(casting) (323 words)

	CCBDA Publication 13E: Section 3 - Centrifugal Casting
		Centrifugal castings are produced by pouring molten metal into a mold that is being rotated or revolved during the casting operation.
		The outside surfaces of the casting or the mold surface proper, can be modified from the true circular shape by the introduction of flanges or small bosses, but they must be generally symmetrical about the axis to maintain balance.
		The uniformity and density of centrifugal castings approach that of wrought material, with the added advantage that the mechanical properties are nearly equal in all directions.
	www.ccbda.org /publications/pub13e/13e-Section3.html (265 words)

	New Page 1
		Centrifugal castings are frequently referred to as " liquid forgings " because in the centrifugal process, molten metal is literally forged by the high compressive pressure exerted by the centrifugal force.
		Unlike conventional gravity or static castings that chill from both the inside and outside surfaces, centrifugal castings freeze from the outside surface inward.
		Centrifugal castings are available in most copper alloys.
	www.lnfcc.com /process.htm (330 words)

	Centrifugal Cast Bronze
		Centrifugal castings are frequently referred to as "liquid forgings" because in the centrifugal process, molten metal is literally forged by the high compressive pressure exerted by the centrifugal force.
		Centrifugal cast metal purity withstands greater overload and strain without fracture.
		During spinning, heavier metal is forced outward, displacing the lighter oxides and impurities and causing them to "float" inward toward the central axis to be removed later in the boring operation.
	www.anchorbronze.com /centrifugalcast.htm (256 words)

	Steam Casting 1
		I believe that the expensive high volume casters may actually use the force of a vacuum to cast the metal, but the small vacuum casters that are under $1,000.00 do not use the force of vacuum to actually cast the metal.
		I believe that it is not the force vacuum that actually casts the metal in to the mold, but the force of suction that does the casting.
		Centrifugal casting actually uses a force that is stronger than gravity.
	users.frii.com /dnorris/steamcast1.html (2212 words)

	Centrifugal casting (from metallurgy) -- Encyclopædia Britannica
		It is used for the casting of small precious-metal objects, so that essentially all of the metal goes into the casting instead of the gates and risers.
		In the most common type, called the volute centrifugal pump, fluid enters the pump at high speed near the centre of the rotating impeller and is thrown against the casing by the vanes.
		Centrifugal fans are classified according to blade arrangement as radial, airfoil, and forward curved.
	www.britannica.com /eb/article-81889 (761 words)

	Castcraft - centrifugal casting information (Site not responding. Last check: 2007-10-11)
		Because the centrifugal force acts to increase the pressure on the casting material, castings with relatively thin parts can be made.
		A mold for a spin casting machine is often designed to make a dozen or so identical parts at one time, with the mold cavity for each part equally spaced around the disk of the rubber mold.
		Other types of small spin casting machines are used by jewelry makers, usually to cast small amounts of precious metals, and not using rubber molds.
	www.castcraft.com /centinf.htm (483 words)

	Sand Casting: Introduction
		The processes of sand casting are discussed in this section, include patterns, sprues and runners, design considerations, and casting allowance.
		The purpose of this is feed the molten metal to the mold cavity as the molten metal solidifies and shrinks, and thereby prevents voids in the main casting.
		In a two-part mold, which is typical of sand castings, the upper half, including the top half of the pattern, flask, and core is called cope and the lower half is called drag.
	www.efunda.com /processes/metal_processing/sand_casting_intro.cfm (612 words)

	Hycast Metals - Centrifugal Casting
		Centrifugal casting is a fast, efficient and low-cost method of producing superior quality hollow-bar for machining into your components.
		The centrifugal force also displaces any dissolved gases and suspended non-metallics ensuring that they are segregated to the inside diameter for easy removal by machining.
		Hycast Metal's centrifugal cast hollow bars are available in a broad range of standard and non-standard sizes and all types of air melted alloys.
	www.hycast.com.au /centrifugalcasting.htm (481 words)

	Manufacturing
		Centrifugal Casting: In this group of processes the molten metal is forced to distribute into the mold cavity due to centrifugal acceleration.
		Continuous Casting: In continuous casting, a stream of molten metal comes out of a water-cooled orifice and forms a continuous strip or rod which is then cut by a circular saw.
		Continuous casting has a very high metal yield, about ninety-eight percent compared to eighty-seven percent in conventional ingot-mold practices, excellent quality of cast, controlled grain size and the ability of casting special cross-sectional shapes.
	www.esm.psu.edu /courses/emch13/design/design-tech/manufacturing/manuf_4.html (623 words)

	Odessa Babbitt Bearing Company - Odessa, TX - Houston, TX - Manufacturer of Bearings & Labyrinth Seals: Technical ...
		The centrifugal casting process employed by OBBCO delivers a remarkably uniform, flaw-free casting that will be shaped, appropriate babbitt coated, and finally milled to its ultimate form.
		The chilled casting is then removed from the form and transported to the rough turnng lathe room area.
		Castings may be left full size, or cut into appropriate lengths for further processing.
	www.obbco.com /techinfo1.html (219 words)

	Centrifugal Casting - American Centrifugal - ACIPCO
		Casting is defined as the act of forming a plastic or liquid substance (molten iron or steel) into a particular shape, as by pouring the substance into a mold and allowing it to solidify.
		The gates and risers are subsequently removed and discarded in the cleaning of the casting.
		The inside of cylindrical conventional castings (usually known as static castings) is formed by the portion of the mold known as the core.
	www.acipco.com /centrifugal/casting (187 words)

	Saint-Gobain Vetrotex: Centrifugal Casting
		Centrifugal casting is increasingly used to produce poles, such as telephone and street lighting poles.
		The resin impregnates the reinforcement under the effect of the centrifugal force and forms, after polymerization, a cylindrical structure.
		After the materials have been introduced into the mold, the speed of rotation is increased until the molding speed is reached.
	www.sgva.com /fabrication_processes/rna_centrif.html (157 words)

	Centrifugal Casting (Site not responding. Last check: 2007-10-11)
		Centrifugal castings are produced by pouring molten metal into a mold that is being rotated or revolved.
		Molten metal is poured into the spinning mold cavity and the metal is held against the wall of the mold by centrifugal force.
		The uniformity and density of centrifugal astings approaches that or wought material, with the added advantage that the mechanical properties are nearly equal in all directions.
	www.gfmco.com /centrifugal.htm (131 words)

	Casting - keyword information
		Centrifugal casting is a casting process by which axi-symmetrical parts are made.
		NYCastings is a casting wire service providing top-quality casting to directors and producers in Film, TV,...
		Sand Casting is a process by which molten metal is poured in sand molds to produce parts in an economical manner.
	www.top-adsense-keywords.com /keywords/casting.htm (244 words)

	[No title]
		The metal to be cast is poured in one end and as the tube spins the molten metal is forced to the inside of the tubes outer surface forming a hollow cylinder.
		To obtain similar pressures in a sand casting would require a sprue height which is impossible to obtain.
		The centrifugal force is radially outward, while the inward forces are those due to the pressure differential, gravity, and the shearing force due to the viscosity of the molten.
	et.nmsu.edu /~etti/winter99/manufacturing/gohmann/gohmann.html (966 words)

	Vertical Centrifugal Investment-Casting Machine
		The major components of the vertical centrifugal investment-casting machine are a funnel, a turntable with a clamping mechanism, an electric motor, exterior shells and supports, a base plate, two semicylindrical ceramic heaters with insulation, a heat-conducting interior drip shield, and a heater-control device with feedback from a thermocouple.
		Although not part of the machine, a digital stroboscope and an accelerometer with a temperature-compensation and signal-amplification circuit are used during the vertical centrifugal investment-casting process.
		For each shell being cast, it is necessary to test for vibrations, using a hand-held stroboscope, in order to determine the exact masses and locations of counterweights and the optimum rate of rotation.
	www.nasatech.com /Briefs/Mar98/MFS31181.html (546 words)

	TCE - Centrifugal Vacuum Casting Machine for investment casting
		The machine is suited to produce precision casting of jewellery alloys, dental alloys, industrial alloys, containing gold, silver, platinum, palladium, steel, nickel, CrCo (Chrome-Cobalt), copper, titanium and other reactive elements, with lost-wax investment casting system.
		The casting cycle begins with alloy melting under protective gas or vacuum and the following casting into the flask by centrifugal force.
		A medium frequency induction heating system guarantee a fast and homogeneous mixing of the alloy before casting while temperature measurement is achieved with an accurate infrared optical pyrometer.
	www.topcast.it /eng/TCE.htm (271 words)

	[Jewelry making - Article 00159] - Re: [Orchid] Vacum casting vs. centrifugal casting
		Centrifugal equipment my be the least expensive way to go but it will limit the size of castings you can produce.
		I don't believe, unless you use a high end centrifugal casting system, you can obtain the same temperature consistency with centrifugal casting using a torch to melt the metal as you can with a vacuum system and electro melt furnace.
		With a centrifugal system the flask temperature may cool or be heated by the torch before pouring the metal.
	www.ganoksin.com /orchid/archive/200406/msg00159.htm (618 words)

	(WO 01/45879) METHOD FOR CENTRIFUGAL CASTING OF BLANKS FOR ROLLERS USED IN MACHINES FOR CONTINUOUS CASTING OF BLANKS ... (Site not responding. Last check: 2007-10-11)
		Prior to casting and introducing iron powder (IP), a powder-like modifying additive is introduced into the melt until an outer layer of the blank is obtained.
		In accordance with the invention, when the outer layer of the blank is formed the introduction into the melt of the powder-like modifying additives continuously accompanied by a reduction in the consumption thereof down to zero.
		Simultaneously the iron powder is introduced into the melt with an increase the consumption thereof from zero up to 1.5 - 3.0 % in relation to the casting metal per second until the formation of an intermediate layer of a mixture of the powder-like modifying additives and the iron powder of 2-4 mm thickness.
	www.wipo.int /ipdl/IPDL-CIMAGES/view/pct/getbykey5?KEY=01/45879.010830 (279 words)

	Centrifugal Casting Manufacturer Miller Centrifugal Casting Company
		Miller Centrifugal Casting Company (MCC) has specialized in designing, casting and finishing high grade, centrifugally cast ferrous and non-ferrous products for over 40 years.
		Our patented unique near-net shape casting process gives us the capability to cast and machine complex, irregular shapes as well as concentric shapes, in sizes up to 120 inches in diameter and weights up to 30,000 pounds.
		Miller Centrifugal Casting Company produces standard and complex contoured shapes as a single item or in high volume quantities in a broad range of copper, nickel, cobalt, iron and aluminum based alloys.
	www.millercentrifugal.com (148 words)

	Castcraft - Centrifugal Casting book (Site not responding. Last check: 2007-10-11)
		Spin Casting is used to make large quantities of small metal or plastic products with relatively inexpensive machinery.
		Instead of the hundreds of thousands of dollars that is required for large scale injection molding machinery, spin casting equipment is in the $10-20,000 range.
		He shows the necessary equipment and supplies, and shows which silicone rubber materials are best for making the spin casting molds, and how to make the molds.
	www.castcraft.com /prod13.htm (165 words)

	☞ reference - Casting (Site not responding. Last check: 2007-10-11)
		Such soothsayers took too casting things such as stick, stones or bones upon the ground and divining their meaning from...
		Casting is a process by which a material is introduced into a...
		Casting is often used for creating one or...
	www.1st-web-reference.info /casting (587 words)

	Centrifugal Casting INSTRUCTA (Site not responding. Last check: 2007-10-11)
		As a representative of the casting methods with permanent moulds, e.g.
		The eutectic tin/lead alloy (melting point exactly 183ºC), is heated in the gray cast iron ladle and poured into a fire-clay lined crucible.
		The centrifugal casting machine is delivered complete and ready to use in a robust case.
	www.technolab.org /Instructa/CentrifugalCasting.htm (254 words)

	Casting Machines
		All Kerr Centrifico™ Casting Machines produce a strong yet controlled centrifugal force, producing dense castings.
		Casts all flasks up to 3-1/2" diameter x 2-5/8" (90mm x 65mm) high.
		Integral Systems' Casting Well comes complete with a galvanized steel base for use with centrifugal casting machines.
	www.canyonstatedentalsupply.com /casting.htm (118 words)

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