Two-end-through vacuum heat-insulated container outer tube sealing structure and sealing method
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Solution Overview
Problem
Existing two-end-through vacuum cup containers face issues with heat preservation, lead exposure from glass sealing materials, sticker failure, incomplete sealing, and unsightly appearance due to existing sealing methods.
Innovation Solution
A stainless steel two-end-through vacuum heat-insulated container outer tube sealing structure featuring a vacuum cavity filled with glass sealing material, where a shielding cover is laser welded to a circular step and polished for a gap-free fit, and the weld beads are removed by sanding to ensure a seamless and attractive finish.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If glass sealing material is used to form vacuum cavity, then heat preservation is achieved, but lead exposure harmful to human body occurs
Solution Approach 1:
A shielding cover made of stainless steel is introduced as an intermediary component between the glass sealing material and the external environment. This shielding cover completely covers the glass sealing material, preventing lead exposure while maintaining the vacuum cavity's heat preservation function. The shielding cover acts as a mediator that blocks harmful lead substances from contacting users.
2Shape
If sticker is used to cover vacuum hole, then appearance is maintained, but sticker falls off during usage and cleaning
Solution Approach 1:
The adhesive bonding mechanism (sticker) is replaced with a mechanical sealing system consisting of a shielding cover that is laser-welded to the container body. This mechanical connection provides reliable and durable sealing that maintains appearance while withstanding usage and cleaning conditions, eliminating the falling-off problem of stickers.
3Reliability
If stainless steel butt-joint welding is used to cover vacuum hole, then sealing is improved, but weld beads affect appearance
Solution Approach 1:
Traditional arc welding is replaced with laser welding technology. Laser welding produces finer, more concentrated weld beads that are less visible and affect appearance less. The process maintains complete sealing reliability while significantly improving the aesthetic appearance of the weld joints on the stainless steel shielding cover.
4Reliability
If glass sealing material is exposed, then vacuum seal is maintained, but glass consumables contact medium and cause appearance defects
Solution Approach 1:
The shielding cover serves as an intermediary component that completely encloses the glass sealing material within the vacuum cavity. This ensures the vacuum seal is maintained through the glass material while preventing any contact between the glass consumables and the external medium, thereby eliminating appearance defects and health concerns.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution provides effective heat preservation without exposing glass materials, preventing lead harm and ensuring the container remains intact and aesthetically pleasing, while maintaining a vacuum seal during use and cleaning.
Implementation Method 1
a shielding cover is subjected to primary welding on the circular step; the welding for the shielding cover and the circular step is laser welding
Implementation Method 2
The welding for the other end of the shielding cover and the mouth part of the bottle body is laser welding or argon arc welding
Implementation Method 3
a weld bead of the welding is removed by polishing
Data Source
AI summary
A two-end-through vacuum heat-insulated container outer tube sealing structure includes a vacuum heat-insulated container outer tube, where a shoulder part of the vacuum heat-insulated container outer tube is provided with a plane; a vacuum cavity is formed in the plane; a vacuum hole for vacuum pumping is formed in the vacuum cavity; the vacuum cavity is filled with a sealing material; a side surface of the plane of the shoulder part is provided with a circular step from top to bottom; a shielding cover is subjected to primary welding on the circular step; a weld bead of the welding is removed by polishing; the shielding cover and the circular step are in gap-free fit; the other end of the shielding cover is subjected to secondary welding with a mouth part of a bottle body; and the weld bead of the welding is removed by sanding the mouth.