Suction Belt Table Catching Device for Sheet Alignment
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Solution Overview
Problem
The challenge lies in efficiently transitioning sheets from a linear transport path to a curved, circular arc-shaped path on a suction belt table, which is often problematic due to the difficulty in maintaining sheet alignment and preventing disruption during high-speed processing in digital printing machines.
Innovation Solution
A suction belt table equipped with a catching device featuring a slider crank mechanism and pneumatic cylinder, allowing for rapid adjustment of a stop surface to catch and stack sheets, ensuring continuous operation even during malfunctions downstream, thereby preventing sheet disruption and maintaining high-speed processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sheets are transported at high speed through the suction belt table, then productivity is improved, but sheet alignment and transport stability deteriorate
Solution Approach 1:
The suction belt table is positioned to receive sheets from the linear transport device before they enter the curved path section. By preparing the sheets on a stable linear path first, the system ensures proper alignment is established before the challenging curved transport begins, preventing alignment loss at high speeds
Solution Approach 2:
The suction belt table acts as an intermediary device between the linear transport device and the curved path transport device. It provides a transition zone where sheets are held and prepared under suction, smoothing the transition and maintaining alignment control during the speed-dependent transport process
2Reliability
If a catching device is added to catch and stack sheets on the suction belt table, then reliability is improved by preventing disruption, but device complexity increases
Solution Approach 1:
The catching device is designed as a separate, extractable module with a stop surface that can be independently actuated. This modular approach allows the catching function to be added without fundamentally redesigning the entire suction belt table, managing complexity while maintaining reliability
Solution Approach 2:
The stop surface of the catching device is designed to be movable rather than fixed, allowing it to be actuated into position only when needed for catching sheets. This dynamic element provides the reliability benefit of disruption prevention while maintaining simpler operational states during normal continuous transport
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
The solution enables effective catching and stacking of sheets on the suction belt table, ensuring uninterrupted operation even at high transport speeds, addressing the challenge of transitioning sheets to a curved path while preventing operational disruptions and maintaining efficient processing.
Implementation Method 1
these sheets are transported individually lying on at least one conveyor belt. While lying on the at least one conveyor belt, the individual sheets are each held frictionally or force-fit on the respective conveyor belt by a suction force, i.e. by a holding force caused by a suction flow.
Data Source
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AI summary
The invention relates to a machine assembly having a plurality of processing stations which each process substrates in the form of sheets, wherein: said processing stations are disposed one behind the other in the direction of transport (T) of the substrates in the form of sheets; at least one of said processing stations has a transport device (18) which transports the substrates in the form of sheets along a linear transport path while said substrates in the form of sheets are in a lying position; said transport device (18) is designed to transport individual substrates in the form of sheets which immediately follow each other in a sequence, said substrates in the form of sheets being mutually spaced apart by respective gaps; downstream of said transport device (18) which transports the substrates in the form of sheets along a linear transport path while said substrates in the form of sheets are in a lying position, there is a suction belt table (19); the suction belt table (19) comprises a catching device (58) having a catching position for individual substrates in the form of sheets which follow each other in a sequence, the catching position being assumed as a result of actuation; the catching device (58), in its catching position, catches and stacks, on the suction belt table (19), substrates in the form of sheets which are fed to the suction belt table (19) from the transport device (18) which transports the substrates in the form of sheets along a linear transport path while said substrates in the form of sheets are in a lying position and which is upstream of the suction belt table (19), before said substrates in the form of sheets are transferred to a transport device which is downstream of the suction belt table (19).