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Process Overview

Investment casting, also known as lost-wax casting, is one of the oldest techniques and is widely favored for its ability to create complex shapes with smooth surfaces. Here, a wax pattern is coated with a ceramic material. Once the ceramic is hardened, the wax is melted away, leaving a cavity that is then filled with molten aluminum. This process allows for high detail and accuracy and is often used in industries where precision is paramount, such as aerospace and medical devices.

Moreover, sand casting is remarkably cost-effective, requiring minimal investment in equipment and materials, especially when compared to other casting methods. The use of sand as a primary material is another benefit, as it is abundant and inexpensive. Additionally, advancements in technology, such as the integration of computer-aided design (CAD) and computer-aided manufacturing (CAM), have further improved the efficiency and accuracy of sand casting, allowing for even more intricate designs and rapid prototyping.

2. ساخت قالب الگوی ایجاد شده در مرحله قبل با یک ماده خاص پوشانده می‌شود تا قالب سختی شکل بگیرد. این مرحله می‌تواند شامل استفاده از مواد سرامیکی باشد که تحمل دماهای بالا را دارند.

CNC Sand Casting A Modern Approach to Precision Manufacturing

The addition of water requires careful monitoring, as ideal moisture content usually falls between 2-4%. The mixture is combined using a mechanically controlled mixer to ensure an even distribution of the components. After mixing, the green sand should have a ‘moist’ feel yet be cohesive enough to hold its shape when squeezed in hand. The consistency can be tested by forming small balls; they should hold together without crumbling or falling apart.

3. Die Design and Thermal Considerations The design of the die plays a significant role in the overall success of the die casting process. Proper thermal management is crucial to minimize thermal gradients that can lead to warping or cracking of the resultant parts. Key factors in die design include ensuring adequate ventilation, incorporating cooling channels, and selecting suitable materials for the die that can withstand high thermal stresses.