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| Investment casting |
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2009-11-13 08:11:29 | 发表人: hdhshhe |
Investment casting ised hardy an industrial process based on and also called lost-wax casting, one of the oldest known metal-forming techniques.[url=1] From 5,000 years ago, when beeswax formed the pattern, to today’s high-technology waxes, refractory materials and specialist alloys, the castings allow the production of components with accuracy, repeatability, versatility and integrity in a variety of metals and high-performance alloys. Lost foam casting is a modern formwow power leveling of investment casting that eliminates certain steps in the process. The process is generally used for small castings, but has produced complete aircraft door frames, steel castings of up to 300 kg and aluminium castings of up to 30 kg. It is generally more expensive per unit than die casting or sand casting but with lower equipment cost. It can produce complicated shapes that would be difficult or impossible with die casting, yet like that process, it requires little surface finishing and only minor machining.
Since itsUGG Boots on Sale foundation, Beijing Changhang Investment Casting Co., Ltd. has been paying emphasized attention to R & D of high-tech products, with its new product coming out every year. At present, it has developed products such as rough cobalt-based alloy artificial joints, cast non-allowance impellers, vanes and air-core vanes for aircrafts, trains and ships, as well as various high-temperature resistant, abrasion-proof and corrosion-resistant products and so on, which wow goldare widely used in the fields such as medicine, aviation, space flight, metallurgy, chemical industry, construction and military industry. High-tech products have become the mainstay for the company’s development. Assemble the wax patterns: The wax pattern is then removed from the mold. Depending on the application multiple wax patterns may be created so that they can all be cast at once. In otherinvestment casting applications, multiple different wax patterns may be created and then assembled into one complex pattern. In the first case the multiple patterns are attached to a wax sprue, with the result known as a pattern cluster, or tree; as many as several hundred patterns may be assembled into a tree.[url=3] Foundries often use registration marks to indicateUGG Boots exactly where they go.[url=citation needed] The wax patterns are attached to the sprue or each other by means of a heated metal tool.[url=2] The wax pattern may also be chased, which means the parting line or flashing are rubbed out using the heated metal tool. Finally it is dressed, which means any other imperfections are addressed so that the wax now looks like the finished piece.
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