The Advantages Of Precision Casting

- May 27, 2017 -

Casting Casting is known as precision casting, is a less cutting or no cutting precision casting process, precision casting industry is an excellent process technology, Precision Casting its application is very extensive. It is not only suitable for all types, precision casting of various alloys, but also to produce the casting size accuracy, surface quality than other precision casting methods to be high, and even other precision casting method difficult to cast the complex, high temperature, easy to process Of the casting, can be used to cast precision casting.

Precision casting is developed on the basis of the ancient wax mold precision casting. As an ancient civilization, China is one of the earlier countries to use this technology, Precision Casting as far as hundreds of years BC, the ancient Chinese working people to create this lost wax precision casting technology, used for precision casting with a variety of fine patterns And the text of the Zhong Ding and utensils and other products, such as the Spring and Autumn period Zeng Houyi tomb tomb and so on. Zeng Houyi tomb tomb tomb for a number of intertwined dragon, they are connected to each other, up and down staggered, the formation of the middle hollow multi-layer cloud pattern, these patterns with ordinary precision casting process is difficult to manufacture, Precision Casting and loss of wax Precision casting process, you can use the strength of the paraffin is not easy, easy to carve the characteristics of ordinary tools can be carved with the Zeng Hou tomb to be the same as the gravel material of the handicrafts, and then additional pouring system, paint, Pouring, you can get a fine Zeng Houyi tomb tomb plate.

Modern precision casting method in industrial production has been the practical application in the twentieth century, the fifties. At that time the development of aviation jet engines required the manufacture of heat-resistant alloy parts such as blades, Precision Casting impellers, nozzles and other complex shapes, precise dimensions and smooth surface. Since the heat-resistant alloy material is difficult to be machined and the parts are complicated in shape so that they can not or can be difficult to be manufactured by other methods. Therefore, it is necessary to find a new and precise molding process. Then, by drawing on the lost casting of the ancient wax, Process improvement, Precision Casting modern precision casting method in the ancient process on the basis of access to important development. Therefore, the development of the aviation industry to promote the application of precision casting, and precision casting of continuous improvement and improvement, but also for the aviation industry to further improve the performance to create favorable conditions.

China is in the last century, the sixties and sixties began to apply precision casting in industrial production. Since then, this advanced precision casting process has been greatly developed and has been widely used in the manufacturing industries such as aviation, automobiles, Precision Casting machine tools, ships, internal combustion engines, gas turbines, telecommunications equipment, weapons, medical devices and knives. Manufacture of arts and crafts.

The so-called precision casting process, simply that is made of fusible material (such as wax or plastic) made of fusible model (referred to as investment or model), in which a number of layers of special refractory coating, after drying and hardening After a whole shell, and then steam or hot water from the shell in the melt off the model, and then put the shell in the sand box, filled with dry sand in its shape, and finally the mold into the roasting furnace after high temperature roasting (Such as the use of high-strength shell, Precision Casting you can not shape the mold after the shell directly fired), casting or shell by roasting, pouring molten metal in which to get castings.

The biggest advantage of precision casting is because the investment casting has a high dimensional accuracy and surface finish, it can reduce the machining work, but in the parts on the higher parts of the request to leave a little margin can be processed, and even some cast only Polished, polished margin, no mechanical processing can be used. It can be seen that the use of precision casting method can save a lot of machine tools and processing time, substantial savings in metal raw materials.

Another advantage of the precision casting method is that it can accurately cast complex castings of various alloys, especially for precision casting of high temperature alloy castings. Such as jet engine blades, the streamlined profile and cooling with the cavity, with the mechanical processing technology is almost impossible to form. With the precision casting process can not only do mass production, to ensure the consistency of the casting, but also to avoid the mechanical processing of residual stress after the knife.