Site Map | XML | Home | Email | Inquiry Basket Aluminum Sand Casting, Gravity Die Casting, Aluminum Die Casting Manufacturer.
Advantages of investment casting

  The so-called investment casting process, it simply is to use fusible material, the fusible model, on which several layers of a special fire-resistant coating paint "paint, after drying and hardening to form a whole shell after, then steam or hot water melt away from the shell in the model, then the shell placed in sand box, when filling the dry sand molding around it, and finally the mold into the roaster in the high temperature roasting (such as the use of high-strength shell, may not have modeling and the release of the shell directly after baking), mold or shell after firing, in which the molten metal pouring obtained castings.

  Size high precision castings, generally up CT4-6 (sand casting of CT10 ~ 13, die-casting of CT5 ~ 7), of course, due to the investment casting process is complex, factors affecting the dimensional accuracy of the casting is more, such as mold material shrinkage, melting mold deformed shell line the amount of change in the heating and cooling process, the shrinkage of the alloy and casting solidification during deformation, etc., so the ordinary investment castings dimensional accuracy, although high, but its still need to improve consistency (using the high-temperature wax casting size consistency to improve the lot).

  When pressed melt mold cavity surface finish using a high-pressure, therefore, melting mold surface finish is relatively high. In addition, the shell from special binder and refractory high temperature refractory coating formulated into "target =" _ blank "> paint painted and hung on the melting mold made cavity surface in direct contact with the molten metal finish Therefore, the surface finish Castings higher than the general castings, generally up Ra.1.6 ~ 3.2μm.

  Casting biggest advantage is due to the castings with high dimensional accuracy and surface finish, it is possible to reduce the machining work, but in the higher part of the site can stay a little allowance, and even some casting only stay grinding, polishing margin, without having to machining can be used. Thus, the use of investment casting method can save a lot of machine tools "target =" _ blank "> equipment and processing time, substantial savings of metal raw materials.

  Another advantage of the investment casting method is that it may be cast complex castings of various alloys, in particular high-temperature alloy castings can be cast. Such as jet engine blades, its sleek profile with a cooling cavity, with the machining process is almost impossible to form. Investment casting process to produce not only mass production can be done to ensure the consistency of the casting, and to avoid the concentration of residual stress knife pattern after machining.

Copyright © 2017 Hebei Riton Dali Trading Co., Ltd. all right