Webbing Fastener Integrating Compressing Edge for Luggage
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Solution Overview
Problem
Conventional webbing assembly for luggage articles is cumbersome and inefficient due to the need for punching holes and separate assembly steps, which results in low production efficiency and poor appearance, and existing dual-material injection molding processes face challenges with material shifting and deformation during secondary molding.
Innovation Solution
A webbing fastener design that integrates a webbing into a hard rubber part with positioning cylinders and a compressing edge, eliminating the need for punching holes and using an injection molding method with spacer grooves to prevent glue from directly hitting soft materials, ensuring stable assembly and improved pass rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional webbing assembly with punching holes and separate mounting is used, then the webbing can be securely fixed to the luggage article, but the assembly process becomes cumbersome and production efficiency decreases
Solution Approach 1:
The patent combines the webbing and hard rubber part into a single integrated component through co-molding. The webbing is directly molded onto the hard rubber part, eliminating the need for separate assembly steps including punching holes, inserting webbing, and securing with screws. This merging of components maintains secure fixation while dramatically improving production efficiency.
Solution Approach 2:
The webbing is pre-positioned and integrated into the hard rubber part during the molding process itself. The co-molding technique allows the webbing to be preliminarily attached to the hard rubber part before final assembly, ensuring proper positioning and secure fixation is achieved during manufacturing rather than during subsequent assembly operations.
2Reliability
If conventional webbing assembly with multiple steps is used, then secure fixation is achieved, but the assembly procedure becomes complex and appearance quality deteriorates
Solution Approach 1:
By merging the webbing and hard rubber part into a single co-molded component, the patent eliminates multiple assembly steps including punching, inserting, and screwing. The integrated design simplifies the assembly procedure to a single operation while maintaining secure fixation and improving appearance quality by eliminating visible fasteners and assembly joints.
3Productivity
If dual-material injection molding is used to create integrated webbing and hard rubber part, then assembly is simplified and production efficiency improves, but material shifting and deformation occur during secondary molding
Solution Approach 1:
The patent employs a two-stage injection molding process where the hard rubber part is first molded, then the webbing material is injected in a controlled second stage. This periodic action allows each material to be properly positioned and cured in sequence, preventing material shifting and deformation while achieving the integrated design benefits.
Solution Approach 2:
The patent uses a specially designed mold structure with positioning features and controlled injection channels that act as intermediaries between the two materials. The mold ensures proper alignment and prevents material shifting during the co-molding process, while the controlled injection system delivers each material to its precise location without causing deformation.
Data Source
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AI summary
A webbing fastener of a luggage article, relating to the field of luggage article parts design and comprising a webbing and a hard rubber part. The bottom side face of the hard rubber part is integrally provided with a webbing insertion slot, and the left end of the webbing is integrally formed in the webbing insertion slot; the bottom side face of the hard rubber part is integrally provided with several positioning cylinders, the right side of the positioning cylinder is provided with a slot, a slider is mounted in the positioning cylinder in a sliding-fit manner, a threaded hole is formed on the slider, a bump is formed at the right side of the bottom end of the slider, and the bump is mounted in the slot in a sliding-fit manner; the outer end of the bump is integrally provided with a compressing edge, the compressing edge is mounted in the webbing insertion slot in a clearance-fit manner, the compressing edge compresses the left edge of the webbing, and the compressing edge is positioned at the right side of the several positioning cylinders. The webbing fastener of a luggage article disclosed has the following beneficial effects that punching holes on a webbing is not needed, assembly is easy, and loosening after assembly is prevented.