Insulated Cup Body Mold Technology and Practical Experience (Part 2)

A cup holds stories, and life carries warmth. Hello everyone, "Dong Dong's Cup Talk" is back! In the previous article, I invited Mr. Feng, our factory’s plastic mold specialist, to share key considerations in plastic mold manufacturing. http://www.zhanyict.com/en/ProductsDetail-VB-10513.htmlToday, I’ve asked Mr. Ding, our metal stamping mold expert, to discuss insulated cup body mold technologies and practical insights. Given the depth of the topic, I’ll break it down into multiple parts.

II. Why Are Deep-Drawing Molds Time-Consuming and Costly?

1. Multi-Stage Process with High Iteration Complexity

- Single-layer cup bodies require 3–4 deep-drawing steps, while double-layer cups demand 6–8 deep-drawing stages + http://www.zhanyict.com/en/ProductsDetail-VB-10513.htmlvacuum brazing (development time is 2–3 times longer than plastic molds).

- Failure Case: A factory skipped simulation validation to rush production, resulting in 5 mold revisions (extending the timeline from 45 to 120 days).

2. Extreme Precision Requirements

- Cup rim diameter tolerance must be ≤±0.05mm (1/10th of a human hair’s width). Mold mating surfaces require slow wire-cutting (taking 3 times longer than fast wire-cutting).

- Cost Breakdown: http://www.zhanyict.com/en/ProductsDetail-VB-10513.htmlMachining fees for a double-layer cup deep-drawing mold reach ¥50,000–70,000, accounting for 60% of total mold costs.

3. High Debugging Risks

- Stainless steel springback ranges from 0.2–0.3mm, necessitating repeated mold adjustments (Success Case: http://www.zhanyict.com/en/ProductsDetail-VB-10513.htmlOne project reduced trial runs from 8 to 2 by pre-engineering a reverse springback angle).

(To be continued in upcoming parts...)