| Technical Feature | Standard Specification | Premium Configuration (Optional) |
| Main Material | Cr12MoV (Long-life alloy) | DC53 / Tungsten Carbide Inserts |
| Hardness (HRC) | 58-62 HRC | Up to 65 HRC (Cryogenic Treatment) |
| Processing Method | CNC Machining + Manual Polishing | High-Precision EDM + Mirror Grinding |
| Mould Life | 500,000+ Strokes | 1,000,000+ Strokes |
| Applicable Press | 400T - 1000T Hydraulic Press | Automated Servo Press Lines |
| Component Name | Key Function | Material Grade |
| Deep Drawing Die | Forming the cylinder upper/lower halves | Alloy Steel (High Wear Resistance) |
| Trimming & Joggling Die | Precise edge cutting and overlapping joint prep | Specialized Cutting Tool Steel |
| Valve Boss Die | Piercing and forming the top valve seating | Hardened Tool Steel |
| Guard Ring Mould | Forming the protective handle ring | High-Strength Cast Iron/Steel |
| Foot Ring Mould | Base ring stamping and ventilation holes | Structural Die Steel |
Precision Engineering for High-Stress Applications
Unlike standard stamping dies, LPG tank tooling must manage significant metal flow without compromising material density. Our design philosophy centers on Incremental Forming Logic. We analyze the R-angle and friction coefficient of the draw bead to ensure that the steel sheet flows smoothly into the cavity. This precision minimizes thinning at the base corners-the most critical safety point of any pressurized vessel.
Material Selection & Thermal Treatment
We don't just "cut steel." Each mould block undergoes a rigorous heat treatment process:
Stress Relieving: To prevent deformation during long-term production.
Vacuum Quenching: Ensuring uniform hardness from the surface to the core.
Surface Coating (Optional): We offer TD coating or PVD treatments to significantly reduce friction heat, preventing galling when working with high-strength HP295 or HP345 materials.
Unique Competitive Advantages
Minimized Material Waste: Our blanking and drawing dies are optimized to reduce scrap rates by up to 8% through precision edge calculation.
Plug-and-Play Design: Standardized mounting plates ensure our moulds are compatible with mainstream hydraulic presses (e.g., YADON, HARSLE, or European brands).
Concentricity Guaranteed: Specialized centering mechanisms within the trimming dies ensure that the upper and lower halves align perfectly for the final circumferential welding.
Rapid T1 Sampling: We provide full trial reports and sample parts before shipping to ensure the tooling is ready for mass production upon arrival.
Technical FAQ
Q: What steel grade is best for LPG cylinder deep drawing? A: While Cr12MoV is the industry standard for durability, we recommend DC53 for high-volume lines due to its superior toughness and resistance to chipping under high pressure.
Q: Can you customize moulds for different cylinder sizes like 12.5kg or 50kg? A: Absolutely. We provide bespoke tooling designs based on your specific cylinder drawings and your press machine's bolster size.
Q: How do you ensure the wall thickness remains consistent? A: Through precise clearance control between the punch and the die ring, and by fine-tuning the blank holder pressure during the initial T1 trial.
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