jiachuancasting Yeni Üye
Kayıt Tarihi: 2022-22-Nisan Ülke: Avustralya
Aktif Durum: Pasif Gönderilenler: 2
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Gönderen: 2022-22-Nisan Saat 11:44 | Kayıtlı IP
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The main processes and processes in the shell making process are: 1) Degreasing and degreasing of modules In order to improve the ability of the coating to wet the surface of the module, the oil stain on the surface of the module needs to be removed when the wax-based moulding material is used to make the investment mould. 2) Apply paint and sand on the module Before painting and hanging the paint, the paint should be stirred evenly to reduce the precipitation of refractory materials in the paint bucket as much as possible, and the viscosity or specific gravity of the paint should be adjusted so that the paint can fill and wet the investment mold well. The module is immersed in the paint and shakes up and down, so that the paint can well wet the investment mold and evenly cover the surface of the module. After the paint is applied, sanding can be carried out. 3) Shell drying and hardening After each layer of shell is coated, it must be dried and hardened, so that the binder in the coating changes from sol to jelly and gel, and connects the refractory materials together. 4) Loss of investment in self-molded shell After the shell is completely hardened, the module needs to be melted from the shell. Because the module is usually made of wax- based mold material, this process is also called dewaxing. According to the different heating methods, there are many dewaxing methods, the hot water method and the same pressure steam method are used more. 5) Roasted shell If molding (sand filling) is required for pouring, before firing, the demolded shell should be buried in the sand in the box, and then loaded into the furnace for firing. If the high temperature strength of the shell is high and no casting is required, the demolded shell can be directly sent to the furnace for roasting. During roasting, the furnace temperature is gradually increased, and the shell is heated to 800-1000 ° C and kept for a period of time before pouring. Finally, what kind of investment casting shell gives more precision? To learn more, click investment-casting-shell-making-accuracy- higher/">here
Düzenleyen jiachuancasting 2022-22-Nisan Saat 11:46
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