Temporary PCB Panel Rails with Removable, Damage-Free Interlocks
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Solution Overview
Problem
Large-scale PCB production incurs significant waste due to the discarding of excess PCB base material used for panel rails, which can account for up to 10%-30% of the production cost.
Innovation Solution
A system utilizing non-PCB materials for rail elements that interlock with projections and recesses on the panel, allowing the panel to be securely held without damaging the PCB, thus reducing the need for PCB material in the rail.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PCB material is used for panel rails to enable secure handling and assembly during manufacturing, then the panel can be integrated into assembly machinery and protected during the assembly process, but the overall cost of PCB production increases due to discarded PCB base material
Solution Approach 1:
The invention separates the panel into distinct components: the PCB assembly area and the rail elements. The rails are segmented from the PCB material itself, allowing independent material selection for each component based on its specific functional requirements.
Solution Approach 2:
The rail elements are extracted from the PCB material and implemented as separate components made from alternative materials. This extraction eliminates the waste of PCB base material while maintaining the necessary structural and protective functions during manufacturing.
2Object-affected harmful factors
If PCB material is used for rails to protect overhanging or peripheral PCB componentry during assembly, then component protection is achieved, but production cost increases by 10%-30%
Solution Approach 1:
Alternative materials serve as intermediaries between the PCB and the manufacturing process. These materials provide the necessary protective function during assembly without consuming valuable PCB base material, thereby reducing production costs.
Solution Approach 2:
The rail elements are designed as disposable components made from inexpensive alternative materials that can be easily attached and removed. This approach replaces expensive PCB material with cheaper substitutes that fulfill the same temporary protective function.
3Loss of substance
If non-PCB materials are used for rail elements to reduce material waste, then production costs decrease, but the interlock mechanism must be designed to prevent damage to the PCB
Solution Approach 1:
The interlock mechanism incorporates localized features such as projections and recesses that are specifically designed at the interface between the rail and PCB. These local structural modifications enable secure attachment and damage-free removal without requiring complex overall design changes.
4Loss of substance
If the interlock length is designed to be removable without damaging the PCB, then material waste is reduced, but the interlocking strength must be carefully controlled
Solution Approach 1:
The interlock mechanism is designed with dynamic characteristics that allow it to provide strong holding force during assembly operations, then easily release when removal is needed. The interlocking strength is controlled through the geometry of the projection and recess features.
Data Source
AI summary
A system is disclosed. The system includes a panel comprising a printed circuit board (PCB) and a first panel side comprising a first interlock length configured to interlock with a first rail element. The first interlock length includes a projection that interlocks within a corresponding recess of the first rail element, wherein the first interlock length is configured to interlock with the first rail element and be removed from the first rail element without damaging the PCB or the projection. The system may further include the first rail element.