From October 18 to 21, 2023, the 17th China Precision Casting Annual Meeting was held in Dongying, Shandong Province. Dongying Kunwei Machinery Manufacturing Equipment Co., LTD.

From November 17 to 21, 2019, the 16th China Precision Casting Annual Meeting was held in Wuxi, Jiangsu Province. Dongying Kunwei Machinery Manufacturing Equipment Co., LTD.

At present, the concentration of the domestic precision casting industry is relatively low. There are many precision casting enterprises in China, but the vast majority of them are relatively small in scale. With the development of the industry, market competition in the future will become increasingly fierce. Precision casting production enterprises must continuously improve their technical level, introduce advanced equipment, and expand their production scale in order to maintain their market position in the industry.

A casting method for producing castings using ceramic slurry as a casting mold. Ceramic slurry is composed of a mixture of ethyl silicate hydrolysis solution and fine refractory sand with relatively pure texture and high thermal stability, such as fused quartz, zircon, corundum, etc. To facilitate the bonding of ceramic slurries in a short period of time, calcium hydroxide or magnesium oxide are often added as catalysts. Due to the similarity in composition and appearance of the refractory materials used to ceramics, they are called ceramic molds.

Among the total casting production, 60-70% of the castings are produced using sand molds, and about 70% of them are produced using clay sand molds. The main reason is that sand casting has lower costs, simpler production processes, and shorter production cycles compared to other casting methods. So castings such as engine cylinder blocks, cylinder heads, and crankshafts in cars are all produced using clay green sand technology. When the wet type cannot meet the requirements, consider using clay sand surface dry sand type, dry sand type, or other sand types.

Precision casting refers to the general term for the process of obtaining precision dimensional castings. Compared to traditional sand casting technology, precision casting produces castings with more precise dimensions and better surface smoothness. It includes investment casting, ceramic casting, metal casting, pressure casting, and lost foam casting. Precision casting, also known as wax loss casting, produces products that are precise, complex, and close to the final shape of the parts. They can be used directly without or with minimal processing, and are an advanced process for near net shape formation.

It includes investment casting, ceramic casting, metal casting, pressure casting, and lost foam casting. The most commonly used one is investment casting, also known as wax loss casting: selecting suitable investment materials (such as paraffin) to manufacture investment molds; Repeatedly apply refractory coating and sprinkle refractory sand on the investment mold, harden the shell and dry it;

Wax molds are a commonly used casting method. Investment casting mainly consists of mold manufacturing, wax mold manufacturing, shell mold manufacturing, and subsequent processes such as drying, roasting, pouring, and solidification. Wax molds are used to form the mold cavity of castings. In order to obtain castings with high dimensional accuracy and surface finish, wax molds themselves should have high dimensional accuracy and surface finish. The factors that affect the dimensional accuracy of wax molds in the manufacturing process are relatively complex, and there are many process parameters, so the range of variation in the dimensional accuracy of wax molds is relatively large.