Precision casting technology Introduction

Precision casting,Lost wax casting Casting

Science and technology are primary productive forces, with nearly three decades of reform and opening up, industry has been developing rapidly, precision casting and therefore had a good opportunity for development, precision casting is widely used in aerospace, electronics, petroleum, chemicals, transportation, equipment , shipbuilding and various industries, whether it is a modern industrial demand, or the demand for agricultural machinery as well as the needs of everyday life have been not without casting existence.

Compared with the traditional casting, precision casting can obtain relatively accurate casting shapes and high precision. The so-called casting process, it simply is a fusible fusible material model, specially coated thereon a plurality of layers of fire-resistant coating, after drying and hardening to form an integral shell, then use steam or hot water from the melted shell model, and then placed in the shell in the sand box, fill in the dry sand molding around it, and finally cast into the roaster in the high-temperature roasting, mold or shell after roasting, which pouring molten Metal casting is obtained.

Currently there are two kinds of precision casting technology: lost wax precision casting and molding precision casting technology regulator.

Lost wax casting Casting now known, is a little cutting or no cutting precision casting, precision casting industry is an excellent technology, its application is very extensive. It is not only applicable to all types and alloy precision casting, casting and production of dimensional accuracy, surface quality than other methods must be high precision casting, precision casting and even other methods difficult to cast complex, high temperature resistant, not easy to process castings, can be used Casting casting, too.

Regulator forming precision casting technology mainly for large, complex thin-walled part of the casting production problems and the invention of a new casting technology. Using the technology to produce large, complex thin-walled castings, for better filling ability and feeding ability, the casting grain refinement, improved density, performance improved significantly. As the technology continues to research and development, and application of the technology effect and scope has been continuously strengthened and broadened. Currently regulator forming precision casting technology have been in a class of large, complex thin-walled air aluminum alloy castings production has been engineering applications, technical efficiency is very obvious.

More and more mechanical products using precision casting, precision casting with two major advantages inseparable:

(1) precision casting made of complex castings of various alloys, in particular high-temperature alloy castings can be precision casting. Such as jet engine blades, its streamlined outer profile and the cooling chamber, with the machining process is almost impossible to form. With a precision casting process to produce not only mass production can be done to ensure the consistency of the casting, machining and avoid residual knife pattern of stress concentration.

(2) Since castings Casting has high dimensional accuracy and surface finish, so you can reduce machining work, just on the part of the site require a higher allowance to stay a little, and even some casting leaving only polished, polishing margin, without mechanical processing can be used. Thus, the use of precision casting method can save a lot of machine tools and machining time, substantial savings metal raw materials.