With the deep understanding of ceramics, ceramic processing technology is also constantly improving, and the corresponding mold design concept has also undergone great changes. Due to the increase in the technical content of ceramic molds, the structure and layout have undergone great changes, and hot die casting technology has become the main process for the production of ceramic molds.
However, before this, it is necessary to rationally design ceramic hot-die-casting molds. According to the characteristics of ceramic products and considering the scale of actual production, when designing ceramic hot-die-casting molds, the production and development of small batches are mostly in the form of single molds. Form one product at a time. And as far as possible, the net size is used for molding, and subsequent machining is not required, and the blank is directly sintered.
Large-scale production requires the design of a cavity multi-mode ceramic hot die-casting mold, which can produce many blanks in one shot molding. However, no matter which kind of production method, it must be based on the tolerance grade and precision requirements of the product, shape, roundness, verticality, etc., so that the designed ceramic hot die-casting mold is favorable for grouting and easy to demould, and the structure Be as simple as possible.
In the ceramic hot die casting mold design, the contents include mold material, size, etc. The material is generally wrought iron, cast iron or hard aluminum, 45# steel; and the size is multiplied by the size factor of the product according to the size of the product. In addition, venting grooves should be designed in ceramic hot die casting molds to prevent undesirable phenomena.
In addition, the grouting port of the ceramic hot die casting mold is generally a bell mouth, and the specific angle depends on the size of the product, but is generally controlled at 5°-20°. For small workpieces, 5°-10° can meet the requirements, but it is necessary to extend the elliptical bell mouth appropriately.
Of course, all of the above are theoretical values. In the actual industrial production of ceramic hot die casting molds, the scale factor is often used to determine the size of the mold. However, the process requirements are exactly the same as the process of processing the product, and the technical parameters are the same.