Position-Changeable Cylinder Drive for Printing Press Setup
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Solution Overview
Problem
Existing drive systems for sheet material processing machines, particularly in printing and coating units, lack a efficient solution for position-changeable cylinders that can be driven by both a main gear train and an individual motor, limiting flexibility and increasing downtime during plate changes and setup.
Innovation Solution
A drive system where at least one cylinder guiding the sheet material is coupled to a single drive that can be mechanically separated from the main drive, allowing for direct motor-driven operation and position adjustment, enabling simultaneous or phased cleaning and setup of adjacent cylinders, with the ability to synchronize or asynchronous operation with the main drive.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If cylinders are integrated into the main drive via gear train, then mechanical coupling and synchronized operation are improved, but flexibility for position changes and independent operation deteriorates
Solution Approach 1:
The drive system is segmented into a main drive (gear train) and individual drives (motor drives) for different cylinders. Sheet guiding cylinders are coupled to the main drive via gear train for stable synchronized operation, while forme cylinders are coupled to individual motor drives for flexible position changes and independent operation. This segmentation allows each cylinder type to have its own optimized drive configuration.
Solution Approach 2:
The system transitions from a static, fixed mechanical coupling to a dynamic configuration where cylinders can be selectively coupled to either the main drive or individual motor drives. The adjustable mounting positions of forme cylinders allow them to dynamically change their operational state between being in contact with sheet guiding cylinders (synchronized operation) and being in print-off position (independent operation).
2Reliability
If cylinders are mechanically coupled to main drive, then synchronized operation is improved, but downtime during plate changes and setup increases
Solution Approach 1:
Forme cylinders are equipped with individual motor drives that allow them to be pre-positioned and prepared independently of the main drive. During plate changes or setup, the forme cylinder can be independently driven to the appropriate position, and adjacent sheet guiding cylinders can be cleaned or prepared in advance, reducing waiting time and enabling parallel operations.
Solution Approach 2:
The system maintains continuous useful action by allowing different cylinders to operate independently when needed. While one cylinder is undergoing maintenance or plate change, other cylinders can continue operating or be prepared in advance, eliminating idle time and ensuring the production process continues without interruption.
3Adaptability or versatility
If individual motor drives are used for position-changeable cylinders, then operational flexibility is improved, but system complexity increases
Solution Approach 1:
The drive system is designed with universal components that can serve multiple functions. The individual motor drives for forme cylinders use the same type of motor and control architecture as the main drive, allowing a unified control approach. The adjustable mounting positions and interchangeable cylinder configurations enable the same hardware to serve different operational modes, reducing the need for specialized components.
4Ease of operation
If cylinders are separated from main drive with individual drives, then independent operation is improved, but mechanical coupling and sheet guidance deteriorate
Solution Approach 1:
Sheet guiding cylinders act as intermediaries between the main drive and forme cylinders with individual motor drives. When the forme cylinder needs to be in contact with the sheet guiding cylinder, the mechanical coupling provides stable sheet guidance. When the forme cylinder is in print-off position, the individual motor drive provides independent operation capability. The system seamlessly switches between these states based on operational requirements.
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 reduces downtime and setup times by allowing position-changeable cylinders to be driven independently, enabling simultaneous or phased operations with the main drive, improving sheet guidance and reducing operational complexities during plate changes and maintenance.
Implementation Method 1
The rotor (30) is arranged on or on the cylinder journal of the cylinder (8) and the stator (29) is detachably fixed to the adjusting device (25) by means of a fastening device (28)
Data Source
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AI summary
The method involves coupling a pressure cylinder (2) and a rubber blanket cylinder to a main drive (11). A cylinder (8) is coupled to a self-motor drivable single drive (16), which the single drive is drivable opposite to the main drive in a predetermined way. The cylinder is coupled to the single drive, supported in side frames with a changeable axial position (23) and directly placed adjacent to the pressure cylinder. The cylinder is synchronously moved together with a stator and a rotor during a change of the axial position, where the stator and the rotor form the single drive. An independent claim is also included for a drive for driving a processing machine for sheet material, comprising a synchronization unit.