In the metal packaging and vessel manufacturing sectors, the challenge often lies in the transition from a flat metal sheet to a structurally sound, seamless dome. Our Head Stretching Mold solutions are engineered specifically to navigate the complexities of metal flow, ensuring that every industrial cap or tank head meets uncompromising safety standards.
1. Core Technical Architecture
Unlike conventional stamping tools, our head stretching (deep drawing) systems incorporate a multi-stage stress distribution design:
Integrated Blank Holder System: Regulates the material "in-flow" to eliminate flange wrinkling during the high-compression phase.
Optimized Die Radius: Precisely calculated curvature to prevent localized thinning and potential fracture points at the base of the head.
Interchangeable Insert Design: Allows for rapid replacement of high-wear zones, extending the overall die life and reducing long-term maintenance costs.
2. Key Performance Indicators
Material Suitability: Optimized for Grade 304/316 Stainless Steel, P265GH Pressure Vessel Steel, and High-Strength Alloys.
Drawing Ratio: Capable of achieving deep draws in a single stroke, depending on material thickness and geometry.
Surface Integrity: Finished with mirror-polishing and DLC (Diamond-Like Carbon) or TiN coating to ensure a scratch-free output.
Dimensional Accuracy: Maintains strict concentricity and wall thickness uniformity within $\pm 0.08mm$.
3. Overcoming Common Production Hurdles
We understand that material springback and surface galling are the enemies of efficiency. Our Head Stretching Molds utilize advanced thermal treatment processes (Vacuum Quenching + Cryogenic treatment) to stabilize the steel's molecular structure. This results in:
Minimized Springback: Precise geometry control even when working with high-resiliency materials.
Reduced Friction: Lower heat generation during the draw, which protects both the mold and the workpiece surface.
Enhanced Durability: Rated for high-cycle environments, ensuring stable production runs without frequent recalibration.
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