What is extrusion die?

Extrusion dies are mold components used in the extrusion molding process: when materials (such as metals, plastics, rubber, etc.) are pushed or forced through the die under pressure, they acquire a specific cross-sectional shape at the die exit, thereby forming continuous products (profiles, tubes, rods, strips, etc.).

Key Features:

• Determines cross-sectional shape: The die profile corresponds to the final product’s external shape, internal bore, wall thickness, etc.

• Influences forming quality: Including surface quality, dimensional tolerances, wall thickness uniformity, tensile/stress conditions, etc.

• Common materials and structures: Typically manufactured from high-strength, wear-resistant materials (e.g., tool steel, cemented carbide, ceramics, etc.) and may incorporate cooling or heating structures.

Typical Applications

• Metal Profile Extrusion: Such as aluminum profiles, copper bars, and tubes.

• Plastic Extrusion: Such as pipes, sheets, profiles, and flooring profiles.

• Rubber Extrusion: Such as sealing strips and custom-shaped seals.

If you could specify whether you are asking about metal or plastic extrusion, as well as the general product shape (tube/profile/sheet/special-shaped), I can provide further details on common die configurations (such as single-cavity/multi-cavity, mandrel, core shaft, calibration section, etc.) and common issues that may arise.