Integrated Zipper-Frame Extrusion for Durable Bag Openings
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Solution Overview
Problem
Existing zippers for travel bags made of synthetic resin or metal materials are prone to damage and separation due to weak adhesive fixation, leading to reduced bag durability and user satisfaction.
Innovation Solution
A manufacturing apparatus and method that extrudes a frame with a zipper integrated during the process, eliminating the need for sewing or adhesive fixation, ensuring the zipper is firmly connected to the frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the zipper is fixed to the frame using adhesive or sewing methods, then the manufacturing process is simple, but the zipper connection strength is weak and durability is reduced
Solution Approach 1:
The patent merges the zipper attachment process with the frame extrusion process into a single integrated operation. The zipper is positioned in the mold cavity before extrusion, and the molten resin directly bonds the zipper to the frame during forming, eliminating separate attachment steps while achieving strong mechanical bonding.
Solution Approach 2:
The patent replaces mechanical attachment methods (sewing, adhesive bonding) with a thermal-mechanical bonding process. The molten resin at extrusion temperature directly bonds the zipper to the frame through cooling and solidification, creating a stronger mechanical bond than adhesive or sewing methods.
2Adaptability or versatility
If multiple separate manufacturing steps are used for frame and zipper assembly, then manufacturing flexibility is maintained, but manufacturing efficiency and productivity are reduced
Solution Approach 1:
The patent combines frame extrusion and zipper attachment into a single integrated process step. The zipper is positioned in the mold cavity, and both the frame and zipper are formed simultaneously during extrusion, eliminating multiple separate manufacturing steps and significantly improving productivity.
Solution Approach 2:
The zipper is pre-positioned in the mold cavity before the extrusion process begins. This preliminary positioning allows the zipper to be automatically bonded to the frame during extrusion without requiring separate handling or assembly steps, improving manufacturing efficiency.
3Manufacturing precision
If the zipper is attached separately after frame manufacturing, then quality control is easier, but the zipper may separate under pressure and durability is reduced
Solution Approach 1:
The patent replaces post-manufacturing attachment methods with an integrated thermal-mechanical bonding process. The molten resin directly bonds the zipper to the frame during extrusion, and the cooling process creates a strong mechanical bond that prevents separation under pressure, achieving both quality control and high strength.
Solution Approach 2:
The patent merges the frame forming and zipper bonding operations into a single integrated process. The zipper is bonded to the frame during the extrusion and cooling process, ensuring uniform bonding quality and preventing separation that would occur with separate attachment methods.
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
Enhances the quality and durability of the bag by preventing zipper separation and reducing manufacturing steps, thereby improving user satisfaction.
Implementation Method 1
an extruding part configured to extrude the frame with the raw material supplied from the raw material supply part
Implementation Method 2
a cooling-transfer part configured to cool and transfer the frame extruded together with the zipper by the extruding part
Data Source
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AI summary
The present disclosure is for the purpose of providing an apparatus for manufacturing a zipper for a bag in which the zipper is provided in an opening of the bag of a hard type, which is made of a synthetic resin or aluminum, while being connected to a frame when extruding the frame, thus eliminating a need to sew or adhesively fix the zipper to the frame molded as in the related art, minimizing manufacturing operations, improving a manufacturing efficiency, enhancing the quality of the bag by firmly connecting the zipper to the frame, and sufficiently ensuring user's satisfaction, and a method of manufacturing the zipper for the bag.