Plastic Fastening Anchors for Recyclable Bristle Bundle Fixing
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Solution Overview
Problem
The use of metal fastening anchors in bristle products with plastic components hinders recycling due to material incompatibility, leading to difficulties in recycling the entire product.
Innovation Solution
A method utilizing a plastics material fastening anchor that is plastically deformed during incorporation into the bristle carrier's bundle receptacle bore, forming anchoring structures for reliable fixation, allowing for single-material products with simplified recycling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal fastening anchors are used to reliably anchor bristle bundles in bundle receptacle bores, then the anchoring reliability is improved, but the recyclability of the bristle product deteriorates due to material incompatibility with plastic components
Solution Approach 1:
The fastening anchor is made of plastics material to match the material composition of the bristle carrier and other product components. This homogeneity in material composition enables the entire product to be recycled as a single material stream, eliminating the separation issues caused by metal fastening anchors while maintaining the required anchoring function through plastic-to-plastic bonding.
Solution Approach 2:
The invention changes the material parameter of the fastening anchor from metal to plastics material. This parameter change resolves the contradiction by enabling recyclability while maintaining functional performance through appropriate selection of plastics material properties (strength, flexibility, bonding characteristics) that satisfy the anchoring requirements.
2Ease of manufacture
If plastics material fastening anchors are used to enable recycling, then the recyclability is improved, but the anchoring reliability may deteriorate due to potentially lower strength compared to metal
Solution Approach 1:
The fastening anchor is designed with a curved or conical geometry that facilitates insertion into the bundle receptacle bore and creates mechanical interlocking through deformation. The curved shape allows the plastics material to be compressed and deformed during insertion, creating anchoring structures that compensate for the lower inherent strength of plastics compared to metal.
Solution Approach 2:
The fastening anchor is designed to be deformable during insertion, transitioning from a rigid state to a compressed/deformed state within the receptacle bore. This dynamic deformation process creates mechanical interlocking and anchoring structures that enhance the bonding strength, allowing plastics material to achieve reliability comparable to metal fastening anchors.
3Reliability
If the fastening anchor is deformed during incorporation to form anchoring structures, then the anchoring reliability is improved, but the manufacturing complexity increases
Solution Approach 1:
The fastening anchor is designed to deform and form anchoring structures through the insertion process itself, utilizing the mechanical action of insertion to create the anchoring function. This self-service mechanism eliminates the need for separate deformation or anchoring operations, reducing manufacturing complexity while maintaining reliable anchoring through the inherent deformation behavior of the plastics material during standard insertion.
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
Enables reliable anchoring of bristle bundles while facilitating the recycling of bristle products by using a plastics material fastening anchor that forms anchoring structures through deformation, resulting in efficient and environmentally friendly manufacturing.
Implementation Method 1
the fastening anchor during incorporation into the bundle receptacle bore is deformed while forming at least one end-proximal anchoring structure
Data Source
AI summary
A method of manufacturing bristle products (2), in which a bristle carrier (3) provided with at least one bundle receptacle bore (4) is provided, and a bristle bundle (5) is incorporated conjointly with a fastening anchor (6) into the bundle receptacle bore (4) and anchored in the latter by the fastening anchor (6). The fastening anchor (6), during incorporation into the bundle receptacle bore (4), is deformed while forming at least one end-proximal anchoring structure (7).