Can Decorator Drive Automation with Servo Control
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Solution Overview
Problem
Conventional can decorators require manual and labor-intensive processes for registering printing cylinders, which is time-consuming and skill-dependent, limiting efficiency and image quality in can decoration.
Innovation Solution
Independent servo motors drive each axis of the can decorator, with encoders and condition monitoring, allowing for precise speed matching and automated adjustment of printing cylinder positions through axial and radial actuators, enabling automated registration and maintenance without halting the entire system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual adjustment of printing cylinders is used for registration, then operators can visually inspect and adjust image quality, but the process is time-consuming and labor-intensive
Solution Approach 1:
The patent replaces manual mechanical adjustment with an automated system using servo motors and encoders to precisely control the position of printing cylinders. The system uses electronic feedback from encoders to automatically adjust axial and radial positions, eliminating the need for manual inspection and adjustment while maintaining high registration quality.
Solution Approach 2:
The registration system performs self-adjustment through automated feedback control. The encoder monitors the actual position of printing cylinders and automatically makes corrections without human intervention, allowing the system to self-correct registration errors while operators focus on quality oversight rather than manual adjustment.
2Stability of the object's composition
If all machine components are mechanically linked through a single motor, then synchronization is maintained, but maintenance requires halting the entire system
Solution Approach 1:
The patent divides the drive system into independent modular units, with each main axis (blanket drum, spindle disc, transfer wheel, pin chain drive) driven by its own servo motor. This segmentation allows individual components to be maintained or replaced without affecting other parts of the system, while the controller maintains synchronization through electronic coordination.
Solution Approach 2:
The system transitions from rigid mechanical linkage to dynamic electronic control. Independent servo motors with encoders provide real-time feedback to the controller, which dynamically adjusts each axis to maintain synchronization. This dynamic approach replaces fixed mechanical connections with flexible electronic coordination, enabling independent maintenance while preserving operational harmony.
3Manufacturing precision
If operators manually adjust plate cylinders multiple times for each color, then image registration can be achieved, but the process requires skill and experience
Solution Approach 1:
The patent implements closed-loop feedback control using encoders on each servo motor. The encoder continuously monitors the actual position of printing cylinders and feeds this information back to the controller. The controller compares the actual position with the target position and automatically makes corrections, eliminating the need for skilled operators to manually adjust and recheck registration multiple times.
Solution Approach 2:
The system replaces skilled manual adjustment with automated electronic control. The servo motors with encoder feedback automatically position printing cylinders with high precision, removing the dependency on operator expertise for registration while maintaining or improving accuracy consistency across different operators and shifts.
Data Source
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AI summary
A can decorator comprising a spindle disc, a blanket drum, a transfer wheel, a pin chain drive, and a controller. The spindle disc is adapted for (i) receiving beverage cans from an infeed and (ii) carrying and rotating each can body on a corresponding spindle. The blanket drum is adapted for (i) applying ink to printing cylinders and (ii) rotating the print cylinders in registration with beverage cans on the spindle disc to decorate the cans. The transfer wheel is adapted for receiving beverage cans from the spindle disc after decoration by the blanket drum. The pin chain drive is adapted for receiving cans from the transfer wheel and transporting the cans on a chain through an oven. The controller adapted for receiving encoder information and matching or adjusting speeds of a spindle disc motor, a blanket drum motor, a transfer wheel motor, and a pin chain drive motor.