How vacuum insulated thermal bottle flask made?
- choose right spec, especially thickness of stainless steel tube material
- “cutting” stainless steel tube to right dimension
- “molding” stainless steel tube to design shape, outer wall body, inner wall body
- “molding” screw on inner wall body or outer wall body
- “cleaning with ultrasonic”
- “copper lining” on inner wall body for better heat/cold retention “15%”
- “welding” on mouth and bottom to create a double wall bottle
- “welding” getter on inner wall body for long term vacuum insulation
- “vacuum process” inside the vacuum machine, and test vacuum insulation 100%
- “electrolysis” for creating a layer on inner of bottle to prevent rust
- “polishing” on outer wall of bottle
- vacuum test 100%
- painting, powder coating, water-transfer, printing, laser etc.
- assembly with cap and packaging
- final pre-shipment inspection
Above is main processes for manufacturing a stainless steel double wall vacuum insulated thermal bottle flask, with good heat retention “hot 12H/cold 24H”, 100% leak proof, 100% food grade.
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