Manufacturing method for ceramic mold casting

Abstract

The invention discloses a manufacturing method of ceramic mold casting, which comprises the following steps of refractory material selecting, adhesive selecting, electrolyzed water preparing, ceramicslurry preparing, ceramic slurry pouring, drawing, torch firing, and roasting, wherein a ventilating agent and a coagulation accelerator are added during preparation of the ceramic slurry, the gelatinization time after ceramic slurry pouring can be adjusted through the addition amount of a coagulation accelerator, the gelatinization time for a small piece can be controlled to be 4-6 seconds, the gelatinization time for medium and large pieces can be controlled to be 8-15 seconds, when the drawing time is about two times of the gelatinization time, the roasting temperature is 870-950 DEG C after gelatinizing is conducted for 5-15 minutes, roasting lasts for 1-3 hours, and therefore cracks are prevented from being generated. Products machined through the method are high in surface precision,low in cost, and high and stable in quality.

Description

technical field [0001] The invention relates to a manufacturing method of ceramic mold casting, which belongs to the technical field of casting. Background technique [0002] The existing casting process generally adopts sand casting, metal casting and ceramic casting, each of which has advantages and disadvantages for casting molds made of many materials. Now it is necessary to develop a casting process to make the casting effect better and the quality of the cast product better. Part of the market uses mullite to make 2% shrinkage ceramics. This method is not suitable for products that require high surface precision. Some use zircon sand and zirconium powder to make 2% shrinkage ceramics. This method requires zirconium. Sand zirconium powder material cost is too high, and economic benefit is poor, and another part adopts fused quartz (PVC powder) to make 2% shrinkage ceramics, and this kind of method material selection is comparatively important, otherwise it is easy to c...

AI Technical Summary

Problems solved by technology

Part of the market uses mullite to make ceramics with 2% shrinkage. This method is not suitable for products that require high surface precision, and some use zircon sand and zirconium powder to make ceramics with 2% shrinkage. This method requires zirconium. The material cost of sand zirconium powder is too high, and the economic benefit is poor. The other part uses fused silica (PVC powder) to make 2% shrinkage ceramics. This method is more important in material selection, otherwise it will easily cause unstable quality and other situations