Nicety of the law that break candle is cast say nicety of fusible pattern nicety is cast now, it is a kind of little cutting or the accurate foundry technology that do not have cutting, it is nicety casts one of the industry superior engineering technology, its application is very wide. It applies to the nicety of all sorts of all sorts of types, alloy to cast not only, and quality of the cast dimension precision that production gives, surface casts a method to want than other nicety tall, even other nicety casts a method be hard to the complex, high temperature resistant, does not machine easily cast that casting gets, all can use nicety of fusible pattern nicety to cast casting to get. The development on the foundation that casts in archaic wax-pattern nicety rises nicety of fusible pattern nicety is cast. Regard civilization as ancient country, china is to use one of countries of prior of this one technology, far count in BC hundred years, working people of our country ancient time created this kind of nicety that break candle to cast a technology, use nicety to cast the goods such as the Zhong Ding that contains all sorts of fine figure and written language and household utensils, the grave of Ceng Hou second when be like age honour dish wait. Grave of Ceng Hou second honour dish the dragon that base twines each other for many, their end to end, fluctuation crisscross, form among hollow-out pattern of record of much stratus grain, these design use common and accurate foundry technology to be made very hard, and with foundry technology of nicety of the law that break candle, can use olefin to do not have intensity, easily carven characteristic, can carve a Ceng Hou second that reachs with place good with common tool grave honour dish the handicraft with same olefin qualitative capable person, add again next gating system, coating, dewax, pouring, can get grave of elegant Ceng Hou second honour dish. Nicety of contemporary fusible pattern casts a method to get applied actually in industrial production is in 20 centuries 40 time. At that time the development of aviation reaction engine, ask the form such as production elephant lamina, impeller, nozzle is complex, size is exact and the heat-resisting alloy spare parts with bright and clean surface. As a result of heat-resisting alloy material be hard to machining, spare parts form is complex, as a result cannot or be hard to make with other method, accordingly, need those who search a kind of new nicety to shape craft, draw lessons from ancient time to circulate the nicety breaking candle that come down is cast then, pass the improvement of pair of material and craft, nicety of contemporary fusible pattern casts a method to achieve significant progress on the foundation of archaic craft. So, the development of aviation industry drove the application that fusible pattern nicety casts, and be improved what fusible pattern nicety casts ceaselessly and perfect, also raised function to create advantageous condition further for aviation industry. Our country is at going up century 5, 60 time begin to cast fusible pattern nicety application to be produced at industry. Ever since this kind of advanced accurate foundry technology gets tremendous progress, it is in succession in the production industry such as instrument of turbine of aviation, car, machine tool, shipping, internal-combustion engine, gas, telecommunications, weapon, medical apparatus and instruments and cutting tool be used extensively, also use at the production that arts and crafts tastes at the same time. Foundry technology of nicety of so-called fusible pattern, say simply even if use Yi Rong data (for example candle expects or plastic) make model of Cheng Kerong sex (abbreviation fusible pattern or model) , on its Tu Fure does a tailor-made fireproof painting, the course is dry after forming a whole hard surface with sclerosis, reoccupy vapour or hot water from model the frit in housing drops a model, next model in housing park sandbox, in its all around fill does arenaceous model, roast of high temperature of the course in putting casting mould roast heat finally (if use high strenth case when, but need not modelling and hind of drawing of patterns model housing is direct roast) , casting mould or model after housing classics roast, at among them pouring melt metal and receive cast. Precision of dimension of fusible pattern cast is taller, can amount to CT4-6 commonly (sand mold nicety is cast for CT10~13, die Casting is CT5~7) , the process that casts as a result of fusible pattern nicety of course is complex, the factor that affects cast dimension precision is more, for example of the systole that the model expects, fusible pattern be out of shape, model the shrinkage that housing is heating and the line in cooling process measures change, alloy and in the cast in caky process be out of shape etc, so although the dimension precision of cast of common fusible pattern is taller, but its consistency still needs to rise (the cast size consistency that uses material of candle of medium, high temperature should rise a lot of) . When suppress fusible pattern, use model antrum surface is bright and clean degree of tall profiling, accordingly, the surface of fusible pattern is bright and clean degree taller also. In addition, model the fireproof coating besmear that housing makes up by high temperature resistant special binder and fireproof material is hanged on fusible pattern and make, contact directly with melt metal model the surface inside antrum is bright and clean degree tall. So, the surface of fusible pattern cast is bright and clean degree cast than general nicety tall, can amount to Ra commonly. 1.
6~3.
2 μ M. Because fusible pattern cast is having very tall dimension precision and face,fusible pattern nicety casts the biggest advantage is bright and clean degree, can reduce machining work so, just ask on the spare parts higher position leaves a few mental allowance can, certain even cast leaves surplus of burnish, polish only, need not machining can be used. This shows, use fusible pattern nicety to cast a method to be able to save machine tool equipment and treatment man-hour in great quantities, substantially managing metallic raw material. The another advantage that fusible pattern nicety casts a method is, it is OK and accurate the complex cast that casts all sorts of alloy, particularly OK and accurate cast cast of high temperature alloy. Be like the lamina of jet-propelled engine, its are clipper-built outside outline and refrigeration use lumen, with machining craft cannot be formed almost. With fusible pattern nicety foundry technology production can accomplish batch production not only, assured the consistency of cast, and the stress concentration that Dao Wen remains after avoiding machining. CNC Milling
CNC Machining