A die set is a specialized tooling system used in press machines to ensure the correct positional relationship between the upper and lower dies. Its primary function is to facilitate the attachment of dies to the press machine, allowing for precise and efficient forming processes. The die set consists of several key components:
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Molding Part: This component directly contacts the material and is responsible for forming the product. It is designed to have a simple shape to facilitate easy and precise manufacturing.
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Mounting Part: This part is designed to securely mount the molding part onto the press machine. It ensures that the die set is properly aligned and attached to the press, maintaining the necessary accuracy during operation.
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Pressure Receiving Part: This component is crucial for absorbing and distributing the pressure exerted during the forming process. It helps to relax the pressure acting on the molding part and transmits it effectively to the press machine body, ensuring the longevity and efficiency of the die set.
The design and manufacturing of die sets focus on simplicity and standardization, which allows for their use in multiple processes and with various products. This versatility is achieved by replacing only specific parts, such as the forming parts, while maintaining the integrity of the die set.
Ensuring "eccentricity accuracy" is vital for the proper functioning of the die set. Poor processing and assembly accuracy can lead to issues with concentricity between the punch side (upper side) and the die side (lower side), which can negatively impact the mold and the final product.
Typical examples of die sets include enclosed die sets for general-purpose press machines and high-precision die sets designed for exceptional concentricity (10 μm or less) between the upper and lower dies. Recent advancements have led to the development of smart die sets, which incorporate sensing technology, such as PiezoBolt sensors, enhancing their functionality and precision.
In the context of pellet pressing, die sets are specifically designed to handle the shaping of pellets. These sets include components like die sleeves, plunger rods, spacers, base plates, and release rings, all made from carefully selected and heat-treated steels to ensure durability and reliability under high stresses. The shapes produced can range from very thin to over 2 inches in length, with a focus on precision machining to achieve the best possible results.
Overall, the die set is a critical component in press machine operations, ensuring accuracy, efficiency, and versatility in various manufacturing processes.
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