Metallic Slider Plastic Deformation for Low Slide Resistance
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Solution Overview
Problem
The manufacturing of vertically engaging metallic sliders for slide fasteners is challenging due to high slide resistance when used with rigid materials like thick leather, and existing methods complicate the molding process, making industrial production difficult, especially when trying to remove burrs from metallic molds.
Innovation Solution
A method for manufacturing a metallic slider involves molding a half-finished product with a back opening in the upper-lower direction and then deforming the front end wall to close the back opening through plastic working, creating a plastically deformed portion that forms an isosceles triangle element guide pole, allowing for efficient production and low slide resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a vertically engaging slider is molded in die-cast with a complicated metallic mold shape, then the slider can be produced, but the number of slide cores that can be taken out is limited and burrs are difficult to remove
Solution Approach 1:
The invention divides the molding process into two stages: first molding a half-finished product with an open back, then performing plastic working to close the back opening. This segmentation allows the use of a simpler initial mold configuration while achieving the final complex shape, thereby improving productivity without sacrificing manufacturability.
Solution Approach 2:
The back opening is left open in the half-finished product before final molding, preparing the structure in advance for the plastic working step. This preliminary configuration enables easier removal of slide cores and burrs during the initial molding stage, while the final closing action achieves the required sealed structure.
2Strength
If the slider is made of metal for appearance and strength, then the aesthetic and structural requirements are met, but the manufacturing complexity increases
Solution Approach 1:
The invention changes the physical state and shape parameters of the metal slider during manufacturing: the metal is first molded in a semi-finished state with an open back, then plastic working deforms and closes the back opening. This parameter change approach allows metal to be formed into complex shapes while managing manufacturing complexity through a two-step process.
3Manufacturing precision
If the back opening is closed through plastic working, then the dimensional precision and shape accuracy are improved, but the manufacturing steps increase
Solution Approach 1:
The invention merges the closing of the back opening with the formation of the element guide pole into a single plastic working operation. This combined action achieves both the sealing of the back opening and the creation of the guiding structure, thereby improving dimensional precision without proportionally increasing manufacturing complexity.
Solution Approach 2:
The plastic working step serves multiple functions simultaneously: it closes the back opening to create the final slider shape, forms the element guide pole structure, and achieves the required dimensional precision. This multi-functionality reduces the need for separate manufacturing steps despite the increased precision requirements.
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 method enables the production of vertically engaging metallic sliders suitable for industrial production, reduces slide resistance, and allows for seamless operation on thick materials like leather, with improved sliding properties and dimensional precision.
Implementation Method 1
forming the plastically deformed portion by plastic working in which with the front end wall itself as a fulcrum, the back opening is deformed from an open state to a closed state in the upper-lower direction
Data Source
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AI summary
According to the present invention, there is provided a vertically engaging slider made of metal, which is suitable for the industrial production. The front end wall (109) of the slider according to the present invention has a plastically deformed portion (111) caused by plastic working in which with the front end wall (109) itself as a fulcrum, the back opening (110) is deformed from an open state to a closed state in the upper-lower direction.