Pneumatic Forme Cylinder Sections for Automated Printing Registration
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Solution Overview
Problem
Existing printing press forme cylinders lack efficient mechanisms for remote operation and automated assembly/disassembly of printing forms, particularly in multi-color printing processes where precise registration is crucial.
Innovation Solution
A forme cylinder design with pneumatically actuated holding devices arranged in channels on its lateral surface, allowing for remote operation and automated alignment and mounting of printing forms using a single compressed air supply and control valves, enabling precise registration and simplified assembly processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If holding devices are arranged in channels on the forme cylinder for automated assembly, then automated assembly and remote operation are enabled, but the device complexity increases due to additional channels, holding devices, and control systems
Solution Approach 1:
The forme cylinder is divided into multiple axial sections, each with its own channel and holding device. This segmentation allows independent control of each printing form assembly position, enabling automated operation while maintaining modular complexity that can be managed through standardized repeating units.
Solution Approach 2:
The channels and holding devices are designed as universal components that can be replicated across multiple sections. The single compressed air supply system serves all holding devices uniformly, reducing the need for separate control systems for each device and thereby managing overall system complexity.
2Manufacturing precision
If multiple holding devices are arranged in sections on the forme cylinder, then precise registration is improved, but the quantity of components increases
Solution Approach 1:
The forme cylinder is divided into multiple axial sections with holding devices at predetermined positions. This segmentation enables precise registration by ensuring that each printing form is held at a known, repeatable location relative to the cylinder axis and other sections, while the modular nature means only standardized components are added.
Solution Approach 2:
Each section has holding devices positioned at specific locations optimized for their function. The channels are arranged to provide local access points for each printing form, ensuring precise registration at each location without requiring uniform distribution of all components throughout the entire cylinder.
3Device complexity
If a single compressed air supply is used for all holding devices, then the system is simplified, but the ability to independently control each holding device is reduced
Solution Approach 1:
The pneumatic system is segmented into multiple independent circuits that all draw from a single compressed air supply. Each circuit can be independently controlled via its own control valve, allowing selective actuation of individual holding devices while sharing the common air supply infrastructure that simplifies the overall system.
Solution Approach 2:
The single compressed air supply serves as a universal source for all holding devices. The air supply system is designed to distribute pressure uniformly to all sections, while local control valves provide the versatility to independently activate or deactivate any specific holding device as needed.
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
Enables remote operation and automated assembly/disassembly of printing forms, ensuring precise registration and efficient operation in multi-color printing processes, enhancing the printing press's capability for automated processes and reducing manual intervention.
Implementation Method 1
the holding devices being pneumatically actuable in sections
Data Source
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AI summary
The invention relates to a form cylinder (06) of a printing machine, comprising a plurality of sections (A;B;C;D;E;F) in series in the axial direction on the envelope surface thereof. At least one printing block (01) can be arranged in each of said sections. The form cylinder (06) comprises at least one channel (07) extending in the axial direction thereof, said channel having an opening (08) on the envelope surface of the form cylinder. At least one holding device respectively associated with each section (A,-B;C;D;E;F) is arranged in the, or each, channel. Each holding device can be pneumatically actuated in sections, and at least one recess open on the envelope surface of the form cylinder (06) is formed outside the sections. A device for distributing the compressed air supplied to the form cylinder to the respective sections (A; B; C; D; E; F) is provided in the at least one recess. The device distributing the compressed air supplied to the form cylinder to each section is embodied as an arrangement of a plurality of valves (36). At least one control device (18) is provided outside the form cylinder (06) and used to actuate said valves in a non-contact manner. The control device (18) associated with each valve (36) is oriented towards the envelope surface of the form cylinder (06) in a radial line of influence.