A mandrel is a cylindrical tool used in annular dies to shape and support hollow extruded profiles during plastic or metal extrusion processes.
A mandrel is a precision-engineered cylindrical component that forms the internal surface of hollow profiles during extrusion through an annular die. It maintains dimensional accuracy, controls wall thickness uniformity, and provides structural support to prevent collapse of the material being extruded. In annular die systems, the mandrel is typically mounted concentrically within the die body, creating the annular gap through which material flows to form pipes, tubes, or other hollow cross-sections.
该组件会出现在以下整机或工业产品中。
诱因 → 失效模式 → 工程缓解
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The mandrel creates and maintains the internal dimensions of hollow extruded products, ensuring consistent wall thickness and preventing collapse during material flow.
Mandrel geometry, surface finish, and thermal properties directly impact product dimensional accuracy, surface quality, and production speed through controlled material flow and cooling.
Tool steels like H13 are standard for durability; carbide or ceramic coatings are added for abrasive materials or high-temperature applications to extend service life.
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