More Details
Project Background
The customer was developing a new rice cooker for a competitive market. The function and heating logic were stable, but doubts arose about the housing design. Specifically, they questioned:
- Would the color split look clean?
- Would the joint line feel cheap?
- Would users accept it at first glance?
Tooling was expensive, and guessing was risky. They needed answers before committing to mass production.
The Real Problem
This wasn’t a technical problem; it was a human one. Users judge by appearance, not specs. Two colors magnify every flaw, and bad paint kills trust instantly. A rendering couldn’t answer these questions—only a real prototype could.
Rapid Prototyping Solution
CNC-Machined Plastic Housing
The housing was CNC machined from ABS plastic to achieve:
- Accurate geometry
- Sharp color-split boundaries
- Stable fit between parts
CNC allowed fast iteration without mold costs.
Two-Tone Surface Painting
The housing went through a production-style painting process:
- Surface preparation and sanding
- Primer coating
- First color spray
- Masking and alignment check
- Second color spray
- Final curing
The result was a clean, sharp color transition—no bleed, no mismatch.
You could feel the difference by touch.
Results
With the prototype in hand:
- Design debates ended
- Color choices were locked
- Assembly gaps were corrected
- Tooling risk dropped
Nothing changed inside the product, but the exterior’s appearance was significantly improved.
What This Prototype Proved
1️⃣Two-tone designs must be tested physically
2️⃣Paint quality is part of product engineering
3️⃣Appearance prototypes reduce decision anxiety
4️⃣Real parts beat opinions
Technical Specifications
| Parameter | Value |
|---|---|
| Material | ABS engineering plastic |
| Housing Process | CNC machining |
| Surface Finish | Dual-color spray painting |
| Color Split Accuracy | Visually seamless |
| Prototype Purpose | Appearance & assembly validation |
| Lead Time | 7–10 days |
Application Scenarios
▶️Rice cookers
▶️Multi-cookers
▶️Kitchen appliances with color-split designs
▶️Dealer samples
▶️Pre-tooling reviews
Why This Case Matters
In small kitchen appliances: Color sets price expectations | Surface quality defines brand level | Two-tone designs expose weak execution
A CNC-machined, painted prototype reveals these truths early—when changes are still cheap.
Production Process & Quality Control
- DFM Review: Color split lines and paint feasibility reviewed before machining.
- Rapid Prototyping: Plastic housings produced and finished within days.
- Surface Inspection: Color consistency checked under real kitchen lighting.
- Quality Support: Rework provided if paint or fit does not meet expectations.
