Suction Belt Conveyor Register Alignment for Non-Impact Printing
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Solution Overview
Problem
Existing sheet processing machines face challenges in aligning sheets accurately for non-impact printing, particularly in maintaining register accuracy during the transfer of sheets between processing stations, which affects the quality and efficiency of packaging material production.
Innovation Solution
A hybrid sheet-processing machine arrangement with a linear transport device and suction belt conveyors is used to align sheets in their axial and circumferential registers, allowing for flexible and economical production of packaging materials by combining conventional and non-impact printing technologies, such as inkjet or laser printing, with optimal working speeds for each device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If sheets are transferred between processing stations with large positional tolerance, then the ease of operation and device complexity are improved, but the manufacturing precision (register accuracy) deteriorates
Solution Approach 1:
The suction belt conveyor performs preliminary alignment of sheets in the axial register before they reach the non-impact printing unit. By pre-aligning sheets using suction belts that engage the sheet edges, the system ensures proper positioning without requiring complex real-time adjustment mechanisms during the printing process.
Solution Approach 2:
The suction belt conveyor acts as an intermediary device between the sheet feeder and the non-impact printing unit. It mediates the transfer process by providing a controlled environment for sheet alignment and transport, isolating the printing unit from the variability in sheet positioning from upstream equipment.
2Productivity
If conventional printing units are used, then the manufacturing precision is maintained, but the productivity is limited by the slower speed of conventional units
Solution Approach 1:
The system replaces the mechanical contact-based conventional printing units with non-impact printing technology (such as inkjet or laser printing). This substitution eliminates the mechanical constraints that limited printing speed while maintaining or improving print quality through digital control mechanisms.
Solution Approach 2:
The suction belt conveyor system uses pneumatic principles to align and transport sheets. By using controlled suction through the belts, the system achieves precise sheet positioning without mechanical contact, enabling faster operation while maintaining alignment accuracy required for high-speed non-impact printing.
3Manufacturing precision
If sheets are aligned with tight tolerances, then the manufacturing precision is improved, but the ease of operation and adaptability to varying sheet formats deteriorates
Solution Approach 1:
The suction belt conveyor system is designed with dynamic characteristics that allow it to adapt to different sheet formats. The suction belts can engage with sheets of varying sizes and the alignment mechanism can adjust its operation accordingly, maintaining precise axial register alignment while accommodating format changes without requiring manual reconfiguration.
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 ensures high register accuracy and productivity by adjusting the transport speed and distance between sheets, enabling the production of packaging materials like folding boxes with precise printing and efficient processing of sheets of varying formats.
Implementation Method 1
a suction belt conveyor (52, 78) is provided, which holds and transports the sheets (51)
Data Source
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AI summary
A printing press arrangement having a plurality of processing stations for processing sheets (51) and a method for operating said machine arrangement are proposed, wherein a plurality of processing stations (01; 02; 03; 04; 06; 07; 08; 09; 11; 12) are arranged one after another in the transport direction (T) of the sheets for in-line processing of said sheets, wherein at least one of said processing stations (06) is configured as a non-impact printing device (06), wherein a transfer device which is arranged upstream of the active region of the non-impact printing device (06) is provided for transferring the sheets from a first processing station (01; 02; 03; 04; 06; 07; 08; 09; 11; 12) which is arranged upstream of the non-impact printing device (06) to the non-impact printing device (06), wherein the transfer device aligns in each case the axial register and/or the circumferential register and/or the diagonal register of the sheets in register relative to the printing position of the non-impact printing device (06).