Hook and Loop Connector Pin Rods Foam Adhesion
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Solution Overview
Problem
Existing hook and loop connector pieces face issues with inadequate adhesion to molded foam, leading to air holes and separation, especially when anchor elements obstruct foam flow and flexibility is compromised.
Innovation Solution
The use of pin-like individual rods with smooth surfaces, made from a material that minimizes resistance to foam flow and maximizes surface contact, replaces traditional anchor elements, ensuring reliable adhesion and sealing without air holes, and these rods are designed with a convex head and concave foot for enhanced geometry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional anchor elements with projections are used to improve adhesion to mold foam, then adhesion strength is improved, but foam flow is obstructed causing air holes and reduced manufacturing quality
Solution Approach 1:
The invention changes the geometric parameters of the connecting elements from projected anchor elements to pin-like rods without projections. This parameter change allows the foam to flow around the rods without obstruction while still achieving reliable adhesion through the pin-like geometry that provides sufficient surface area for foam bonding.
Solution Approach 2:
The pin-like rods create a porous structure that allows foam material to flow through and around them during the foaming process. This porous configuration eliminates the obstruction problem of solid anchor elements while maintaining adhesion through the distributed pin structure that the foam can envelop.
2Reliability
If anchor elements are used to enhance adhesion, then connection reliability is improved, but air holes are created due to obstructed foam flow
Solution Approach 1:
By changing the shape parameter from projected anchors to non-projected pin-like rods, the invention eliminates the harmful effect of air hole formation while preserving connection reliability. The pin-like geometry allows complete foam envelopment without creating voids or air pockets.
Solution Approach 2:
The invention converts the potential harm of having connecting elements (which could obstruct foam flow) into a benefit by designing pin-like rods that facilitate foam flow while maintaining adhesion. The rods act as nucleation points for foam growth rather than obstacles, eliminating air holes while ensuring reliable connection.
3Strength
If traditional anchor elements are used, then adhesion is improved, but material consumption increases
Solution Approach 1:
The invention changes the dimensional parameters of the connecting elements, using pin-like rods with optimized diameter and length that consume less material than bulk anchor elements. The pin geometry provides sufficient adhesion surface area with minimal material volume, reducing overall material consumption.
Solution Approach 2:
Instead of using extensive projected anchor elements, the invention applies localized pin-like rods that provide adhesion only where needed. This localized approach reduces material consumption while maintaining adhesion strength through the efficient pin geometry that concentrates bonding capability in minimal material.
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 solution achieves improved adhesion and sealing, allowing the foam to encompass the rods without obstruction, ensuring strong attachment and preventing the hooking elements from being rendered unusable, while using less material and maintaining structural integrity.
Implementation Method 1
The strip-like connecting means consists of a plurality of projecting individual rods, of which only a small number of projections are formed, by means of which adhesion to the mold foam is effected
Implementation Method 2
the respective free side edge area of the respective cover strip in the direction to the support strip can be folded over itself along a fold line running in the longitudinal direction, such that the end edge of the respective free side edge area of the cover strip is facing the assignable longitudinal edge of the support strip
Data Source
AI summary
A hook and loop connector piece includes a support band (10) with hooking elements (12) arranged on one side and at least one cover strip (20) on an opposite side. The cover strip forms at least one free lateral edge region (21) extending over the corresponding lateral edge (33) of the support band (10). The free lateral edge region (21) of the cover strip (20) may be folded over itself, along a fold line (29) extending in the longitudinal direction. The terminal edge (31) of the free lateral edge region (21) of the cover strip (20) is turned towards the corresponding lateral edge (33) of the support band (10). On the side of the hook and loop connector piece away from the hooking elements (12), a connector (36) for a molded foam is provided. The connector (36) is embodied as a number of projecting separate rods (38) performing the adhesion of the foam without additional projections.