Slider Engagement Recess Orientation for Casting Productivity
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Solution Overview
Problem
The existing manufacturing process for sliders in slide fasteners requires multiple molds and slide cores, limiting the number of bodies that can be produced in a single casting process and increasing manufacturing costs due to the need for lateral movement of slide cores, which reduces space and efficiency.
Innovation Solution
The design includes front-side and rear-side engagement recesses that penetrate through the body in the front-rear direction, allowing for the use of a slide core that moves only in the front-rear direction to form these recesses, eliminating the need for a lateral-moving core and enabling more bodies to be produced in a single casting process. Additionally, latching step portions and protrusions prevent the cover member from moving rearward, reducing metal fatigue and maintaining the slider's functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a slide core that moves in the lateral direction is used to form front-side engagement recesses and rear-side engagement recesses, then the engagement recesses can be formed, but the range required for the slide core reduces the space available for arranging multiple bodies, thereby reducing productivity
Solution Approach 1:
Instead of forming engagement recesses by moving the slide core in the lateral direction (perpendicular to the element guide path), the invention inverts the approach by having the engagement recesses extend in the front-rear direction (parallel to the element guide path). This allows the slide core to move only in the front-rear direction, eliminating the need for lateral movement and maximizing space utilization for arranging multiple bodies in the lateral direction.
Solution Approach 2:
The invention changes the dimensional orientation of the engagement recesses from extending in the lateral direction to extending in the front-rear direction. By reorienting the engagement recesses to be parallel to the element guide path, the slide core movement is confined to one dimension (front-rear), while multiple bodies can be arranged in another dimension (lateral direction), thereby increasing productivity without compromising the formation of engagement recesses.
2Manufacturing precision
If multiple slide cores moving in different directions are used to form element guide paths and engagement recesses, then all features can be formed, but the device complexity and manufacturing cost increase
Solution Approach 1:
The invention makes the slide core multi-functional by designing it to perform multiple tasks: forming the element guide path, forming the front-side engagement recesses, and forming the rear-side engagement recesses. By configuring the engagement recesses to extend in the front-rear direction, a single slide core moving in the front-rear direction can accomplish all these functions, eliminating the need for separate slide cores for lateral movement and reducing device complexity.
Solution Approach 2:
The invention merges the functions of multiple slide cores into a single slide core. Instead of using one slide core for element guide paths and another for engagement recesses (with different movement directions), the design combines all these functions into one slide core that moves only in the front-rear direction, thereby simplifying the molding device and reducing manufacturing cost.
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 approach allows for the production of multiple sliders in a single casting process, reducing manufacturing costs and preventing metal fatigue in the elastic piece, while maintaining the slider's functionality and efficiency.
Implementation Method 1
an elastic piece which presses the cover member so that the hook enters the element guide path
Data Source
Figure 1
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AI summary
Provided is a slider for a slide fastener, whereby several bodies can be obtained in one casting process and production costs can be reduced. A cover member (50) has a pair of right and left front-side engagement pieces (56) that engage with a front-side pillar section (30) and a pair of right and left rear-side engagement pieces (57) that engage with a rear-side pillar section (40). Front-side recessed sections for engagement (31) having a surface facing the upper surface of the front-side engagement pieces (56) are formed in the right and left side surfaces of the front-side pillar section (30); rear-side recessed sections for engagement (41) having a surface facing the upper surface of the rear-side engagement pieces (57) are formed in the right and left side surfaces of the rear-side pillar section (40); and the front-side and rear-side recessed sections for engagement (31, 41) are formed penetrating along the front-rear direction of the bodies (20).