Cylindrical Decorator Inker Servo Control for Print Registration
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Solution Overview
Problem
Existing decorator machines for printing on cylindrical structures suffer from misregistration issues that require manual correction, leading to inefficiencies and downtime during the printing process.
Innovation Solution
A decorator system equipped with servomotors and encoders allows independent control over inker motion, enabling real-time adjustments of printing plate cylinder positions to correct misregistration without stopping the printing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual inspection and adjustment is used to correct misregistration, then registration accuracy can be improved, but production downtime increases significantly
Solution Approach 1:
The patent replaces manual mechanical adjustment with an automated servomotor-driven system. The servomotor precisely controls the rotational position of the printing plate cylinder, eliminating the need for manual inspection and adjustment while maintaining high registration accuracy. This substitution of mechanical manual operation with automated motor control directly resolves the contradiction by improving precision while reducing downtime.
Solution Approach 2:
The system incorporates self-correction capability through the servomotor control system that automatically adjusts the printing plate cylinder position based on detected misregistration. Rather than requiring external manual intervention, the system performs its own correction, thereby improving registration accuracy without incurring production downtime associated with manual adjustments.
2Manufacturing precision
If the printing process is stopped for manual adjustments, then registration errors can be corrected, but productivity decreases
Solution Approach 1:
The patent enables continuous printing operation by implementing automated servomotor control that corrects registration errors without stopping the printing process. The servomotor adjusts the printing plate cylinder position on-the-fly, allowing the printing press to maintain continuous operation and thereby preserving productivity while still achieving accurate registration correction.
Solution Approach 2:
The printing system performs self-correction of registration errors through the servomotor control mechanism, eliminating the need to halt production for manual adjustments. This self-service capability allows the system to maintain both high productivity and registration accuracy simultaneously.
3Manufacturing precision
If automated servomotor control is implemented for inker position adjustment, then registration accuracy improves, but device complexity increases
Solution Approach 1:
The patent replaces complex manual adjustment mechanisms with a relatively simple servomotor control system. The servomotor provides precise rotational control of the printing plate cylinder through electronic control, which is less complex than the alternative of sophisticated mechanical adjustment mechanisms. This substitution achieves high position control accuracy while keeping the added complexity manageable.
Solution Approach 2:
The system controls inker position by changing the rotational parameter of the printing plate cylinder through servomotor control. By controlling the angular position parameter electronically rather than through complex mechanical linkages, the system achieves precise position control with relatively simple device architecture.
Data Source
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AI summary
A decorator (10) for printing onto cylindrical structures has a two-piece shaft comprising a first shaft and a second shaft. The first shaft is in operable communication with a drive train (98) and has a central passage passing therethrough. The second shaft is rotatable within the passage independently of rotation by the first shaft. A first gear is operably joined to the first shaft and in engagement with a bull gear. A second gear is operably joined to the first shaft and the drive train (98). Rotational motion by the bull gear transfers rotation to the first gear, which transfers rotational motion to the second gear, which transfers rotational motion to a plurality of inker gears forming the drive train (98). A plurality of angular adjustment servomotors (212). Each angular adjustment servomotor is associated with an inker (12) and is operably joined to the second shaft within the first shaft.