Modular Sheet Processing Machine with Suction Transport
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Solution Overview
Problem
Conventional substrate feed devices and sheet processing machines face challenges in efficiently processing thick sheets and maintaining precise registration during multi-color printing, particularly with non-impact printing methods like inkjet, due to limitations in transport systems and registration control.
Innovation Solution
A sheet-fed processing machine with modular design, featuring independently driven modules for coating, drying, and transport, including a flexographic coating module with diagonal register adjustment and suction transport means, ensures precise registration and handling of thick sheets by maintaining a flat transport path and using position-controlled electric motors for accurate sheet alignment and movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional transport systems are used, then the structure is simple, but they cannot efficiently process thick sheets
Solution Approach 1:
The transport system employs dynamically adjustable components including variable speed drives and adjustable suction force, allowing the system to adapt its characteristics to match the specific requirements of different sheet thicknesses and materials, thereby enabling efficient processing of thick sheets without requiring a completely different transport system structure
Solution Approach 2:
The system changes operational parameters such as suction force magnitude, transport speed, and acceleration rates to accommodate different sheet thicknesses. By adjusting these parameters rather than the fundamental structure, the system maintains versatility for processing thick sheets while keeping the overall device complexity manageable
2Manufacturing precision
If conventional sheet transport is used, then the system is simple, but registration precision deteriorates during multi-color printing
Solution Approach 1:
The system incorporates feedback mechanisms through sensors that detect sheet position, edges, and registration status during transport. This feedback is used by control units to make real-time adjustments to transport speed and positioning, ensuring precise registration for multi-color printing while managing device complexity through intelligent control rather than purely mechanical solutions
Solution Approach 2:
The patent replaces purely mechanical positioning systems with a combination of suction-based holding, sensor detection, and electronic control. This substitution allows for more precise and adjustable registration control without requiring complex mechanical adjustment mechanisms for each printing station
3Productivity
If high speed transport is used, then productivity increases, but sheet deformation increases
Solution Approach 1:
The transport system uses periodic suction and release cycles rather than continuous mechanical contact. Sheets are held by suction during critical positioning phases and released during transport phases, allowing high speed movement while preventing continuous deformation forces that would occur with constant mechanical contact
Solution Approach 2:
The system employs pneumatic suction forces to hold and transport sheets instead of mechanical gripping or pressing. This pneumatic approach allows for uniform distribution of holding force across the sheet surface, preventing localized deformation even at high transport speeds, while still enabling rapid acceleration and deceleration for high productivity
4Adaptability or versatility
If thick sheets are processed, then material versatility improves, but transport control precision deteriorates
Solution Approach 1:
The control system dynamically adjusts suction force magnitude, transport speed, and acceleration profiles based on detected sheet characteristics such as thickness and material type. This dynamic adaptation enables precise control of thick sheets by optimizing the interaction forces for each specific material, maintaining transport control precision across different material versatility 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
The machine achieves high machining precision and cost-effective, variable processing capabilities, enabling efficient handling and printing of thick sheets like corrugated cardboard with reduced deformation and improved print quality, while minimizing damage to print heads and reducing repair costs.
Implementation Method 1
a) in a first region arranged upstream with respect to the transport direction, a first suction force acting on the sheet in the transport direction is generated, and b) in a second region arranged downstream of the first region with respect to the transport direction, a second suction force acting on the sheet in the transport direction is generated
Data Source
Figure 1
Figure 2a
Figure 2b
AI summary
The invention relates to a substrate-feeding device (100) having at least two acceleration means (136), which are arranged one beside the other and beneath the storage region (134), and having a framework (162) and a lifting frame (166; 173; 174), which can be moved relative to the framework, wherein the acceleration means (136) are arranged for movement jointly with one another, and with the lifting frame (166; 173; 174), and wherein each of the acceleration means (136) has at least one body of rotation (163; 187), which is driven via a (136) common shaft (169), which has at least two shaft portions (171) arranged one behind the other, and wherein directly adjacent shaft portions (171) are arranged in a state in which they are connected in each case via a coupling (172), and wherein there are subassemblies provided which each have deflecting means (163), a shaft portion (171) and at least one transporting belt (136) and are each fastened on the lifting frame (166; 173; 174), and/or are arranged for movement jointly with the same, and are connected to one another by virtue of their shaft portions (171) being connected via couplings (172) to form the common shaft (169), and also relates to a sheet-processing machine (01).