Substrate Clamping Mechanism for Flat Processing
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Solution Overview
Problem
Existing methods struggle to process thin flat substrates across their entire surface without applying excessive clamping forces, which can cause bending, while thicker substrates require clamping to prevent warpage but may also bend if not properly supported.
Innovation Solution
A device and method that dynamically adjust the position and force of supports and clamping bars based on substrate thickness and rigidity, allowing clamping bars to function as guides for thin substrates and applying necessary clamping force for thick substrates, with optional automatic control, to ensure flat processing and printing across the entire surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If clamping forces are applied to thick substrates to remove warpage and bend-up, then flat positioning is achieved, but the substrate may be damaged when clamping forces are removed
Solution Approach 1:
The clamping bars are designed to be movable rather than fixed, allowing them to apply clamping force dynamically during positioning and then be removed or retracted to prevent damage. This dynamic adjustment resolves the contradiction between achieving flat positioning through clamping and preventing substrate damage when clamping is released.
2Manufacturing precision
If clamping forces are applied to thin substrates, then flat positioning may be achieved, but the substrate bends due to low inherent rigidity
Solution Approach 1:
The clamping bars are designed to contact only the lateral edges of the substrate rather than the entire surface. This localized clamping approach provides sufficient edge support for flat positioning during printing while minimizing the clamping force applied to the substrate body, thereby preventing bending in thin substrates with low inherent rigidity.
3Area of stationary object
If hold-downs are completely removed to enable full-surface processing, then entire surface printing is possible, but thin substrates cannot be adequately supported
Solution Approach 1:
The hold-down mechanism is completely removed from the system. Instead, only lateral clamping bars at the edges are used for positioning. This extraction of the hold-down allows the entire substrate surface to be accessible for processing while the edge clamping provides sufficient support for thin substrates during printing operations.
Data Source
AI summary
A device and a method for processing flat substrates, such as circuit boards or the like to be printed, is provided. The substrate can be fed resting on a transport device on two opposite side edge regions, can be first lifted from below for the purpose of processing through supports and pressed against corresponding hold-down pieces in the side edge regions, and can be clamped on the corresponding side edges of the substrate in this position, resting on the supports, between two clamping strips, whereupon the hold-down piece can be lowered to the side away from the substrate and the clamping strip and further below the region of the upper side of the substrate thus loaded, such that full-surface processing can take place.