Technical Product Introduction
At Dongmo Precision, we provide specialized Rice Cooker Inner Pot Molds designed for the global home appliance industry. Manufacturing a high-quality inner pot requires a perfect balance between material elongation and mould pressure.
Our dies are engineered to produce pots with perfectly smooth surfaces, essential for the subsequent non-stick coating process. Whether you are producing standard cylindrical pots, spherical (hemispherical) pots, or honeycomb-patterned bottoms, our tooling ensures wall thickness consistency and superior structural integrity.
Technical Specifications
| Feature | Professional Specification |
| Product Application | Rice Cooker Inner Pots, Instant Pot Liners, Pressure Cooker Pots |
| Material Capability | Aluminum Alloy (1050, 3003), Stainless Steel (304, 430) |
| Mould Type | Single-Action / Double-Action Deep Drawing Die |
| Critical Tolerance | ±0.05mm on Diameter and Roundness |
| Surface Finish | Mirror Polishing (Ra < 0.2μm) to prevent drawing marks |
| Die Life | 500,000 to 1,000,000 Strokes (with proper maintenance) |
| Technology | CAE Simulation to optimize drawing ratio and pressure |
Distinguishable Advantages
Zero-Scratch Surface Technology: For appliance parts, surface aesthetics are as important as dimensions. We utilize high-polish tungsten steel or Cr12MoV inserts with specialized lubrication channels to ensure the inner pot surface is free from scratches, reducing the defect rate in the coating stage.
Spherical & Honeycomb Design Expertise: We have extensive experience in designing moulds for "Spherical Inner Pots" . Our dies manage complex metal flow to ensure the curved bottom has uniform thickness without wrinkling.
Optimized Drawing Ratio: Through AutoForm simulation, we calculate the exact multi-stage drawing process needed to prevent fracturing, especially for deep-shaped 5L or 6L professional rice cooker pots.
Precision Trimming & Curling: Our tooling includes integrated or secondary dies for edge trimming and safety curling (rimming), ensuring the pot fits perfectly with the rice cooker's heating plate and lid.
Tooling Process Stages
Blanking: Cutting the precise circular aluminum or steel disc.
Initial Deep Drawing : Forming the basic cup shape.
Refining / Sizing: Adjusting the final radius and wall verticality.
Bottom Patterning: Adding honeycomb or heat-conducting patterns if required.
Trimming & Flanging: Finishing the upper rim for a seamless fit.
Professional FAQ
Q: Why is my inner pot showing wrinkles at the top edge? A: This is usually due to improper blank holder pressure. Our Rice Cooker Inner Pot Molds feature adjustable pressure systems and optimized draw beads to control material flow precisely, eliminating wrinkles even with thin-gauge aluminum.
Q: Can your moulds handle multi-layer clad metal (e.g., Stainless Steel + Aluminum)? A: Yes. We specialize in tooling for composite metals, adjusting the die clearance to account for the different yield strengths of each layer, ensuring no delamination occurs during drawing.
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