After adequate dry thickness, together with temperature, with the intention that internal melting wax off, get in line the cavity with the required precision casting blank is compared with the traditional casting process in terms of a casting method could be relatively accurately shape and high casting made the production of precision casting process: first, to make the necessary rough electrode, second electrode corruption model specific, forming the third cavity, with casting wax casting route to obtain the original model in wax on wax Brush layers of sand on the high temperature of the liquid material and finally cast each morning mold cavity in molten iron, the shell removed after curing can be finished with high exquisitely detailed.
China is in the last century, the fifties and sixties began casting for industrial production. This advanced casting process was an incredible development, one after another in the aerospace, automotive, machine tools, ships, internal combustion engines, gas turbine, telecommunications equipment, weapons, Manufacture of medical equipment and cutting tools are widely employed industry, but also for arts and crafts processing.
The so-called investment casting process, it simply will be use fusible material can melt model, in its coated with some special fire-resistant coating layer, after drying and hardening after the formation of a whole shell, and then steam or hot water out of your Shell in the melting of the model, then Place the shell in the sand box, fill your market surrounding dry sand molding, and finally cast in the roaster in the warm roasting, shell mold or by calcination in which pouring molten metal and get casting.
High dimensional accuracy of castings, generally up to CT4-6, of course, applying as the associated with casting complex factors that affect not really precision casting more materials such as mold shrinkage, melting mode of deformation, and shell in the heat amount of cooling change to create your own of the line alloy solidification shrinkage and deformation with the casting process, the actual size of ordinary investment castings precision are higher, yet still need to strengthen their consistency.
Suppression of melting mode, the cavity surface finish using high-pressure type, therefore, melting mold surface finish is relatively high. In addition, a special shell from the warm binder and refractory material made inside a fire-resistant paint coating on the wax pattern hanging made with molten gold cavity is in direct contact with high surface finish.
Melt casting the biggest advantages is capsicum is derived from TIG Casting has very high precision, surface finish Do not be worried mechanical processing work, Zhi Shi in part on the requirements of the site to stay a little higher allowances can be, and even some of the casting Zhi stay grinding, Polishing margin, can be used without machining. Essential that the involving investment casting method can save much of machine tool equipment and processing time, a substantial savings of metal materials.
Another casting strategy of the advantages reality it can cast a variety of complex alloy castings, in particular, could be made into high-temperature alloy castings. Like jet engine blades, its sleek profile and cooling right out the cavity, with the machining process is almost impossible to form into. With your production of investment casting process can performed not only to mass production, ensures consistency of the casting and machining to avoid the knife after the pattern of residual stress concentration.