Molded Surface Fastener Magnetic Region Segmentation
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Solution Overview
Problem
Molded surface fasteners with magnetic projecting portions tend to have reduced engaging strength with loops, are prone to detachment from the molding die due to low magnetic particle content near the magnet, and suffer from color differentiation issues that complicate correct orientation during attachment.
Innovation Solution
A molded surface fastener design featuring a flat plate-shaped base with resin intrusion barrier portions, hook-shaped engaging elements, and a magnetic region with magnetic raised portions between the engaging elements, where magnetic particles are concentrated near the magnet, ensuring strong magnetic attraction and clear color differentiation between surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If magnetic projecting portions are provided on the base portion to enhance magnetic attraction, then attachment to the molding die is improved, but engaging strength with loops is reduced
Solution Approach 1:
The base portion is divided into distinct functional regions: a magnetic region containing magnetic particles for attachment to the molding die, and a non-magnetic region free of magnetic particles for maintaining engaging strength with loops. This spatial segmentation allows each region to optimize its specific function without interfering with the other.
Solution Approach 2:
Different regions of the base portion are assigned different material properties: the magnetic region contains magnetic particles to provide strong magnetic attraction for die attachment, while the non-magnetic region excludes magnetic particles to preserve optimal engaging strength with loops. This local differentiation resolves the contradiction by allowing each area to have the quality needed for its specific purpose.
2Force
If magnetic particles are distributed throughout the base portion, then magnetic attraction is enhanced, but color differentiation between surfaces is lost
Solution Approach 1:
The base portion is segmented into a magnetic region with magnetic particles and a non-magnetic region without magnetic particles. This segmentation creates visible color differentiation between the front and rear surfaces, enabling easy orientation identification during attachment while still providing sufficient magnetic attraction through the concentrated magnetic region.
Solution Approach 2:
Magnetic particles are locally concentrated in the magnetic region rather than distributed uniformly throughout the base portion. This local concentration maintains strong magnetic attraction force while creating a distinct visual appearance that differentiates the magnetic region from the non-magnetic region, facilitating correct orientation during manufacturing.
3Reliability
If magnetic particles are concentrated near the magnet position, then attachment stability is improved, but engaging strength may be compromised
Solution Approach 1:
The base portion is divided into a magnetic region positioned to receive strong magnetic attraction from the molding die magnet, and a non-magnetic region that maintains optimal engaging strength with loops. This segmentation allows magnetic particles to be concentrated where they provide maximum attachment stability while preventing their presence in areas where they would compromise engaging strength.
Solution Approach 2:
Magnetic particles are concentrated in the magnetic region at positions optimized for magnetic attraction to the die, while the non-magnetic region remains free of magnetic particles to preserve engaging strength. This local quality differentiation resolves the contradiction by allowing each region to optimize its specific function.
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 design enhances engaging strength with loops, stabilizes attachment to the molding die, and simplifies correct orientation during installation by providing clear visual differentiation between the front and rear surfaces, improving work efficiency and reducing errors.
Implementation Method 1
a magnet is buried under a fastener attaching surface of the molding die, while a magnetic material attracted to magnetically by the magnet of the molding die is attached to the molded surface fastener
Data Source
AI summary
A molded surface fastener, in which many magnetic particles can be contained in a closer part with respect to a magnet of a molding die, and further a front surface and a rear surface can be easily identified, is provided. In the molded surface fastener of the invention, a magnetic region containing magnetic particles is formed on at least a part between right and left resin intrusion barrier portions, and a magnetic raised portion which is lower than engaging elements and contains the magnetic particles therein is disposed between the engaging elements adjacent in a length direction within the magnetic region.