1. Material Foundation: Why 3003 Aluminum?
The aluminum sheets used in our production line are 3003 aluminum alloy – the industry-preferred material for rice cooker inner pots.
Key Material Properties:
Excellent thermal conductivity – ensures even heat distribution across the entire cooking surface
Good formability – ideal for deep drawing and stretching processes
Corrosion resistance – suitable for food-contact applications after surface treatment
Typical thickness range: 1.0–2.2mm (depending on pot size; 3L/4L pots use 1.0–1.2mm, 5L/6L pots use 1.5–1.6mm)
The 3003 aluminum round sheet we use undergoes strict quality verification for hardness, surface finish, and dimensional accuracy, ensuring no cracking during deep drawing and no surface defects after forming.
2. Full Process Flow Summary
|
# |
Process Step |
Equipment |
Key Purpose |
|
1 |
Blanking & Honeycomb patterns |
Blanking press *1000T Hydraulic press |
Cut to size & decorative bottom |
|
2 |
Pre-Stretch Oiling |
Roller oiling machine |
Lubricate for drawing |
|
3 |
Primary Drawing |
150T Four-column hydraulic press |
straight body geometry |
|
4 |
Secondary Drawing |
150T Four-column hydraulic press |
Flaring / Flanging / Trimming |
|
5 |
Edge Rolling |
Edge rolling machine |
Smooth, safe rim |
|
6 |
Water Level Marking |
Horizontal marking press |
User-friendly guidance |
|
7 |
Cleaning → Drying → Spray Coating → Drying |
Coating line |
Food safety & non-stick surface |
|
8 |
(Optional) Decorative Trimming |
Trimming lathe |
Premium cosmetic finish |
3. Equipment Configuration Overview
The following table summarizes the key equipment used in our production line:
|
Equipment |
Specification / Type |
Application |
|
Blanking Press |
Mechanical |
Cutting aluminum round sheets |
|
Roller Oiling Machine |
Standard / Optional pneumatic |
Lubrication before drawing |
|
Frame Hydraulic Press |
1000T |
Honeycomb patterns(Option) |
| Four-column hydraulic press |
150T x 2 |
First & Secondary drawing |
|
Dedicated roller type |
Rim curling/rolling |
|
|
Horizontal Marking Press |
Automatic stamping |
Water level marks |
|
Cleaning & Coating Line |
Spray booth + curing oven |
Surface treatment |
|
Trimming Lathe (Optional) |
Machining |
Decorative edge finish |
4. Quality Control Checks
|
Checkpoint |
Inspection Item |
Acceptance Criteria |
|
Raw Material |
Thickness, surface quality, material certificate |
±0.02mm thickness tolerance |
|
After Drawing |
Wall thickness, cracking, wrinkling |
Uniform, no defects |
|
After Trimming |
Dimensional accuracy, burr-free edge |
Within ±0.1mm tolerance |
|
After Edge Rolling |
Rim smoothness, no sharp edges, uniformity |
Smooth, safe, consistent |
|
After Coating |
Coating adhesion, thickness, pinhole test |
Pass adhesion & pinhole tests |
|
Final Inspection |
Complete dimensional check, visual inspection |
100% checked |
5. Automation Upgrade: Robotic Arm Integration for Hands-Free Operation
We have further enhanced our production line with multi-axis robotic arm systems, enabling fully automated material handling - from loading to unloading - with zero manual intervention.
Before vs After Automation
|
Comparison |
Manual Operation |
Robotic Automation |
|
Loading |
Manual placement – high labor intensity, safety risks |
Robotic precision pick-and-place with automatic positioning |
|
Unloading |
Manual removal – low efficiency |
Robotic auto-unloading with rapid transfer to next station |
|
Handling |
Manual transport – risk of scratches and dents |
Automated conveyor + robotic transfer – minimal surface damage |
|
Quality Control |
Relies on operator experience – inconsistent |
Programmed precision – consistent results |
|
Manpower |
Multiple operators required |
One operator can oversee multiple lines |
Our Automation Configuration
✅ Auto Loading System: Robotic arms pick aluminum round sheets from the stack and feed them precisely into the drawing station
✅ Inter-Station Transfer: Robots automatically transfer workpieces between stations - no manual handling required
✅ Auto Unloading System: Finished inner pots are automatically removed and placed onto conveyors for the next process
✅ Smart Inspection Integration: Optional vision system integration for real-time defect detection and automatic rejection
Benefits of Automation
|
Benefit |
Result |
|
Labor Cost Reduced by 60% |
4-5 operators per shift reduced to 1-2 (monitoring & material replenishment only) |
|
Productivity Increased by 30% |
Consistent cycle time, no fatigue, continuous high-speed operation |
|
Consistent Quality |
Eliminates human variability - every part meets the same standard |
|
Safety Improved |
Operators kept away from deep drawing and stamping hazard zones |
|
Surface Quality Enhanced |
Reduced scratches and dents from manual handling - higher yield rate |
6. Beyond Inner Pots: Our Full Capability
While this article focuses on aluminum inner pot production, our engineering expertise extends to the complete set of rice cooker components:
Stamping dies for inner pots, middle rings, and metal housings
Injection molds for plastic housings, lids, panels, and bases
Die-casting molds for heating plates
CKD kits – all components shipped as fully knocked-down sets for local assembly
On-site engineering support – our engineers assist with mold installation, production line setup, and operator training at customer factories
With 15 years of small appliance manufacturing experience, we deliver production-ready solutions from design to mass production.
7. Contact Us
If you are looking for a reliable partner for:
Aluminum inner pot production lines
Complete rice cooker mold sets
CKD component supply
Technical support for your local assembly plant
