Zipper Structure Injection Molded Sealing End Assembly
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Solution Overview
Problem
Conventional zipper structures in bags often suffer from welding defects such as gaps or bubbles, which compromise sealing performance, and additional plastic welding to address these issues can lead to deformation and aesthetic problems.
Innovation Solution
A zipper structure featuring a sealing end assembly connected by injection molding, comprising covering portions, a connecting portion, and bridge portions that fill gaps between zipper components, enhancing sealing and reducing the risk of deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If plastic welding is used to connect zipper components to bag body, then sealing performance is achieved, but welding defects such as gaps or bubbles may occur
Solution Approach 1:
The patent introduces a sealing end assembly as an intermediary component between the zipper components and the bag body. This sealing end assembly includes a sealing portion that extends into the bag body to form a sealing cavity, and a connecting portion that connects to the zipper components. This intermediary structure eliminates direct plastic welding between zipper components and bag body, thereby preventing welding defects while maintaining sealing performance.
Solution Approach 2:
The patent replaces the plastic welding process with an injection molding process to connect the sealing end assembly to the zipper components. The connecting portion is integrally formed with the sealing end assembly through injection molding, eliminating the need for subsequent welding operations and associated defects.
2Manufacturing precision
If additional plastic welding is applied to welding portions, then gap or bubble formation is reduced, but hole formation and deformation occur
Solution Approach 1:
The sealing end assembly serves as a mediator that eliminates the need for additional plastic welding on the bag body surface. The sealing portion extends into the bag body to create a sealing cavity, while the connecting portion attaches to zipper components, thereby preventing both gap/bubble formation and the associated structural defects of holes and deformation.
Solution Approach 2:
The patent substitutes the plastic welding process with injection molding for connecting the sealing end assembly to zipper components. This substitution eliminates the need for additional welding operations that would otherwise be required to address welding defects, thereby preventing hole formation and structural deformation.
3Reliability
If additional plastic welding is applied to welding portions, then sealing is improved, but aesthetic appearance is affected
Solution Approach 1:
The sealing end assembly acts as an intermediary that provides sealing functionality without requiring additional plastic welding on the bag body surface. The sealing portion extends into the bag body to form a sealing cavity, while the connecting portion attaches to zipper components, thereby achieving sealing performance while maintaining the aesthetic appearance of the bag body surface.
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
The solution effectively improves sealing performance by filling gaps and preventing deformation, while maintaining the aesthetic integrity of the zipper bag.
Implementation Method 1
The sealing end assembly is connected to the end of the first zipper component and the end of the second zipper component by injection molding
Data Source
AI summary
A zipper structure is provided and includes a first zipper component including a first zipper portion, a second zipper component including a second zipper portion, and a sealing end assembly. An end part of the first zipper portion of the first zipper component adjacent to an end of the first zipper component and an end part of the second zipper portion of the second zipper component adjacent to an end of the second zipper component are engaged with each other. The sealing end assembly is connected to the ends of the first zipper component and the second zipper component by injection molding and covers surfaces of the ends of the first zipper component and the second zipper component. A gap between the end parts of the first zipper portion and the second zipper portion is filled with the sealing end assembly. Furthermore, a related zipper bag is also provided.