In-Depth Comparative Analysis of Two Manufacturing Processes for the Same Stainless Steel Vacuum Flask (Special-Shaped Products Chapter)

"Every cup tells a story, every life carries warmth." Hello everyone, welcome back to "Dong Dong's Cup Talk" http://www.umbottle.com/ProductsDetail-VB-10480.htmlContinuing our series on manufacturing processes, today we focus on solutions for specially-shaped vacuum flasks - a topic that generated significant interest at recent trade shows.

For our third installment, we'll examine a hexagonal curved vacuum flask (with 3 longitudinal decorative seams) as a case study, http://www.umbottle.com/ProductsDetail-VB-10480.htmlcomparing traditional deep-drawing with innovative hybrid approaches.

### Production Solutions for Special-Shaped Flasks

Case Study: Hexagonal curved vacuum flask (with 3 decorative seams)

Key Challenges:

1. Airtightness in Complex Structures: Curved surfaces prevent traditional deep-drawing from achieving required 0.05mm weld seam precision

2. Multi-Seam Stress Distribution: http://www.umbottle.com/ProductsDetail-VB-10480.htmlBalancing stress concentration between decorative and functional seams

3. Surface Treatment Consistency: Polishing difficulty increases 300% along edges versus flat surfaces

Innovative Hybrid Solution:

1. Body Formation:

- Laser-welded 0.8mm SUS316L sheets

- CNC bending for hexagonal profile

2. Vacuum Sealing:

- 0.3mm copper gaskets pre-installed at six corners

- Localized high-frequency induction welding http://www.umbottle.com/ProductsDetail-VB-10480.html(450kHz)

3. Surface Finishing:

- 12-minute magnetic polishing (using Φ0.2mm stainless steel beads) http://www.umbottle.com/ProductsDetail-VB-10480.htmlfor edge reinforcement

- Masked coating: 50μm primer on weld zones before full surface coating

4. Quality Control:

- Industrial endoscopy for corner weld inspection

- Negative pressure testing http://www.umbottle.com/ProductsDetail-VB-10480.html(-90kPa for 30 minutes)

Cost comparison:

Process type: traditional stretching process, qualified rate 41%, single piece working time 380 seconds, labor accounting for 65%.

Process type: mixed process solution, http://www.umbottle.com/ProductsDetail-VB-10480.htmlqualified rate 82%, single piece working time 260 seconds, labor accounting for 38%.

This hybrid approach demonstrates how combining modern techniques can overcome traditional manufacturing limitations for complex geometries. http://www.umbottle.com/ProductsDetail-VB-10480.htmlThe next installment will explore automated solutions for mass production.