Plastic Component Breakaway Feature for Recycling
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Solution Overview
Problem
Recycling of assemblies with mixed materials, such as plastic components fastened to metal structures, is inefficient due to the difficulty in separating incompatible components, often requiring removal of fasteners that may not be easily accessible.
Innovation Solution
Incorporating a breakaway feature in plastic components, such as slits or slots in mounting tabs, that allow for easy removal from rigid support structures without dislodging the fasteners, enabling the plastic components to be detached by breaking away specific portions along defined lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If plastic components are fastened to metal structures with fasteners for structural integrity, then the assembly strength is improved, but the difficulty of separating components for recycling increases
Solution Approach 1:
The plastic component is divided into two segments: a permanent mounting tab that remains attached to the metal structure with the fastener, and a breakaway portion that can be easily separated. The mounting tab includes a breakaway feature (such as a predefined fracture line or reduced-thickness region) that allows the breakaway portion to be detached without removing the fastener, thus maintaining assembly strength during use while enabling easy separation for recycling.
2Reliability
If fasteners are used to secure plastic components to metal structures, then the reliability of the connection is improved, but the complexity and cost of disassembly for recycling increases
Solution Approach 1:
The connection system is segmented into a permanent mounting tab that maintains reliable connection with the fastener and a removable breakaway portion. The breakaway feature creates a predetermined separation point that simplifies disassembly to merely breaking away the portion, reducing disassembly complexity from requiring fastener removal to a simple breakaway action while preserving connection reliability during the component's service life.
3Stability of the object's composition
If traditional fastening methods are used for plastic components on metal structures, then the structural stability is maintained, but the time and cost required for component separation increases
Solution Approach 1:
The plastic component is segmented with a breakaway feature that creates a weak point for easy separation. The mounting tab with the breakaway feature remains stably attached to the metal structure through the fastener, maintaining structural stability during use. For separation, only the breakaway portion needs to be removed through a simple breaking action, dramatically reducing the time required for component separation compared to traditional methods requiring fastener removal.
Data Source
AI summary
A plastic component is attached to a mounting structure by a fastener that extends at least into a mounting hole in the plastic component. The mounting hole is located near an edge corner of a cantilevered mounting tab that forms part of the plastic component. The mounting tab comprises a generally flat plate that has a depending flange that extends around a rounded corner near which the mounting hole is located and a depending sleeve that is contiguous with the mounting hole. The mounting tab has a break away portion so that the plastic component can be removed for recycling easily. Three variations of the breakaway portion are disclosed.