Ceramic injection molds and ceramic tensile molds are ceramic molds. Ceramic injection molds are similar to ordinary plastic injection molds. They are used only for special ceramic injection molding processes. The injection molding machine injects the flowing ceramic slurry into the mold and cools it. It can be molded afterwards.
Of course, in order to ensure the quality of the molded part, the corresponding technical requirements are also put on the ceramic injection molding mold.
According to past experience, it is basically enough to make the ceramic injection mold shrink by 1.3. The shrinkage of the ceramic mold is largely determined during the sintering process. In addition, the knife should be polished. Different polishing methods should also require different allowances. Considering the convenience of subsequent mold repair, and without deformation, it is recommended to leave 0.1 on one side. Of course, the thickness of the product should not be ignored, and thick places may shrink more.
Ceramic stretch dies are more suitable for softer materials, so harder materials like copper and aluminum are not suitable. In actual practical use, the ceramic tensile molds are all in one line, and if they are to be customized, they are all batch.
Most of the ceramic molds are made of gypsum. When choosing the gypsum, we must pay attention to its hardness, then cast the sulfur tires, and use the gypsum to turn the sulfur tires. As for the anti-folding and anti-wear It is directly related to hardness. If the hardness is high, these two aspects will not occur.
If high-grade bone china is used, the water absorption rate and temperature of the plaster for ceramic mold should be considered. Generally, the temperature of imported gypsum can be burned to more than 1300 degrees, so there is no problem in high temperature resistance. It is necessary to pay attention to its hardness and solidification time.
In addition, the ceramic mold does not require the whiteness of the gypsum used, but the price of gypsum with high whiteness is also high. For example, gypsum with high whiteness is basically used in medical treatment. In addition, the ceramic slurry is more abrasive to the mold, and the fine particles in the slurry itself are abrasives, which are very abrasive to the metal. Therefore, the longer the ceramic mold is used, the more the mold wears. Therefore, ceramic molds are generally produced, and molds of the same specifications need to be made in multiple sets for use.http://www.yxhgmould.com/