In 2003, the gravity casting business of Zhonghuan was officially launched, and aluminum sand casting was simultaneously deployed, opening the road to professional and large-scale casting development. After more than 20 years of intensive cultivation and iteration, the company has now built 11 green sand casting production lines and 1 resin sand casting production line, forming stable and efficient batch manufacturing capabilities. It can undertake various aluminum alloy sand castings weighing from several kilograms to hundreds of kilograms. The maximum molding weight of a single piece reaches 200 kilograms, meeting the needs of large-size, structural parts and customization.

Relying on mature technology and stable production capacity, aluminum sand castings are widely used in high-end equipment fields such as automobiles and trucks, ships and oceans, engineering machinery, new energy equipment, impellers and robots. With stable quality and consistency, our products are exported to markets in North America, Europe, Africa and Southeast Asia, and we have become a trusted aluminum alloy casting partner for global customers.

The company's core competitiveness lies in its full-process mold design and independent manufacturing capabilities, from mold development, process finalization to mass production closed-loop control, to achieve the dual advantages of stable quality and delivery efficiency. The current standard delivery cycle can be stably controlled within 2 weeks, which is significantly better than the industry standard of 3-4 weeks, providing strong support for customers to respond quickly, reduce costs and increase efficiency.

In terms of process guarantee, we adhere to the dual track of experience and digitalization. For aluminum sand castings with different structures, senior casting engineers relied on long-term practice to accurately optimize the design of the gating system, exhaust channels and risers, and predict and eliminate common defects such as shrinkage cavities, porosity, and cold shut in advance.

With 23 years of ingenuity, digital process empowerment and full-chain quality control, the company continues to delve into the field of aluminum alloy sand casting and is committed to becoming a high-performance, fast-delivery, and reliable aluminum casting manufacturing and solution service provider preferred by domestic and foreign customers.

Sand casting has a wide range of applications and can produce ferrous metal castings such as cast iron and cast steel, as well as most non-ferrous metal castings such as aluminum and copper alloys. The mainstream process is divided into two categories: green sand casting (clay sand) and resin sand casting: Green sand is prepared with molding sand, clay and water, which has low cost, good reusability, and efficient mold making. It is the mainstream process in the industry; resin sand is solidified and molded with a chemical binder, which has higher dimensional accuracy, better surface quality, lower risk of defects, and a relatively higher overall cost.

Relying on mature technology and material systems, sand casting is versatile, economical and flexible. It has long been the core basic technology of equipment manufacturing and is widely used in high-end manufacturing fields such as automobiles, engineering machinery, ships, new energy, and robots.

1. The degree of automation of traditional processes is limited, the degree of manual participation is high, and the working environment and labor intensity are relatively outstanding.
2. The dimensional accuracy and surface finish of castings are slightly lower than those of die casting, precision casting and other processes, and some castings require subsequent machining to improve quality.
3. Affected by manual modeling and material characteristics, it is more difficult to control the consistency of castings, and the scrap rate of traditional processes is relatively high.