Die Cast Zipper Slide with Side Shifting Slide
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Solution Overview
Problem
Existing metal zipper slide and pull assemblies are difficult to produce in a single operation without modifying the geometry, leading to weak and prone-to-breakage constructions due to internal angled surfaces, which limit movement and aesthetics.
Innovation Solution
A die cast zipper slide assembly formed in a single operation using at least one side shifting slide, allowing the bridge and pull loop to maintain their full geometric shape without converging flat surfaces, enabling simultaneous formation of the slide and pull without motion-limiting angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If metal slide and pull assemblies are produced using traditional die casting methods, then manufacturing is simplified, but the geometry must be modified with internal angled surfaces that create weak and prone-to-breakage constructions
Solution Approach 1:
The patent introduces a side-shifting slide mechanism that moves the tool in a lateral dimension during the die casting process. This allows the formation of complex three-dimensional geometries including circular pull loops and bridges without requiring compromising internal angled surfaces, thereby maintaining both manufacturing efficiency and structural strength.
2Ease of manufacture
If internal angled surfaces are used in the bridge and pull loop geometry, then tool retraction is enabled, but the pull movement is limited and aesthetic appeal is reduced
Solution Approach 1:
The side-shifting slide allows the tool to retract laterally rather than relying on internal angled surfaces. This enables the bridge and pull loop to maintain their full geometric shape with smooth surfaces, providing unrestricted pull movement while preserving aesthetic appearance.
3Productivity
If the slide and pull are formed in a single operation, then productivity increases, but the rigid properties of metal make tool retraction extremely difficult
Solution Approach 1:
The side-shifting slide mechanism enables the tool to move laterally during the single-operation die casting process, allowing complete formation of the slide, bridge, and pull loop geometry without compromising tool retraction. This maintains high productivity while overcoming the limitations of metal rigidity.
4Ease of manufacture
If converging flat surfaces are used in the bridge geometry, then tool retraction is achieved, but aesthetic appeal and geometric integrity are compromised
Solution Approach 1:
The side-shifting slide allows the tool to retract laterally, eliminating the need for converging flat surfaces in the bridge geometry. This preserves the full geometric integrity and aesthetic appeal of the bridge and pull loop while enabling successful tool retraction.
Data Source
AI summary
The invention involves a slide assembly for a zipper, and a method for manufacturing a zipper slide assembly. The slider assembly is formed in a single die cast operation to include the slider and the pull member being formed simultaneously. At least one side shifting slide is incorporated into the die, which allows the bridge and pull loop to be formed with their full geometric shape and without the converging flat surfaces required in the prior art.