Segmented Magnetic Roll for Flexible Printing Plate Alignment
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Solution Overview
Problem
Conventional magnetic rolls struggle to correctly align pairs of ferro-magnetic flexible printing plates when installed in printing presses, as the alignment mechanisms often exacerbate misalignment of the second plate instead of correcting it.
Innovation Solution
The magnetic roll is segmented with a moveable plate mechanism and rotatable cam and socket combinations that allow for precise adjustment and alignment of the register pins, ensuring uninterrupted magnetic field strength and secure attachment of the plates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional magnetic rolls use fixed register pins for plate alignment, then the structure is simple and easy to manufacture, but the alignment precision deteriorates when multiple plates are installed because roll position adjustment mechanisms cannot correctly align both plates simultaneously
Solution Approach 1:
The magnetic roll is divided into a stationary segment and a movable segment. The register pins are attached to the movable segment, which can be independently adjusted relative to the stationary segment. This segmentation allows the register pins to be precisely positioned for multi-plate alignment without requiring complex adjustment of the entire roll structure.
Solution Approach 2:
The register pin assembly is made movable rather than fixed. The movable segment can be adjusted in position along the roll circumference, enabling dynamic repositioning of the register pins to achieve correct alignment for multiple plates. This dynamic capability resolves the contradiction between simple structure and alignment precision.
2Manufacturing precision
If the magnetic roll incorporates a movable plate mechanism for register pin adjustment, then the alignment precision improves for multiple plates, but the magnetic field continuity may be interrupted at the mechanism location
Solution Approach 1:
A ferromagnetic bridge or connector is introduced as an intermediary element between the movable and stationary segments. This bridge maintains the magnetic flux path continuity across the joint interface, ensuring that the movable mechanism does not create magnetic field interruptions that would compromise plate attachment reliability.
Solution Approach 2:
The magnetic roll employs composite construction with ferromagnetic materials strategically placed at the segment interface. These materials ensure magnetic field continuity while allowing mechanical movement and adjustment of the register pin assembly, resolving the contradiction between precision adjustment and field continuity.
3Ease of operation
If conventional magnetic rolls use fixed register pins, then the device complexity is low, but the ease of operation deteriorates when operators need to align multiple plates as the press adjustment mechanisms become ineffective
Solution Approach 1:
The register pin assembly is made movable rather than fixed. The movable segment can be adjusted in position along the roll circumference, enabling dynamic repositioning of the register pins to achieve correct alignment for multiple plates. This dynamic capability resolves the contradiction between simple structure and alignment precision.
Solution Approach 2:
The movable register pin mechanism is designed to be self-adjusting through simple manual operation. The operator can directly position the movable segment to achieve proper alignment without relying on complex press adjustment mechanisms, making the system easier to operate despite the added mechanical complexity.
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 enables precise and correct alignment of both plates around the magnetic roll, maintaining the continuity of the magnetic field strength and ensuring secure attachment, addressing the misalignment issues in conventional systems.
Implementation Method 1
Magnetic print rolls for magnetic attachment, support, and driving carriage of ferro-magnetic flexible printing plates
Implementation Method 2
ferro-magnetic flexible printing plates
Data Source
AI summary
A roll for supporting at least a first flexible printing, embossing, or sheet cutting die plate, the roll including a cylindrical body having a rotational axis and an outer circumferential surface, the cylindrical body being divided into segments; a first magnet receiving concavity and magnet combination emitting plate attaching magnetic flux at a first circumferential surface segment overlying a first cylindrical body segment; a second magnet receiving concavity and magnet combination, further emitting plate attaching magnetic flux at a second circumferential surface overlying a second cylindrical body segment; plate edge aligning pins connected operatively to the first cylindrical body segment; and segment positioning cam and socket combinations adapted for selectively positioning and repositioning both the first cylindrical body segment and the plate edge aligning pins with respect to the second cylindrical body segment.