Interleaving Unit with Adjustable Tool Sectors for Variable Sheet Lengths
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Solution Overview
Problem
Existing interleaving machines require complex and time-consuming changes to accommodate different sheet lengths, leading to increased costs and operational difficulties due to rigid mechanisms and the need for multiple interchangeable units.
Innovation Solution
An interleaving unit with motor-drive and control means that allow independent adjustment of the speed of rotation of tool-carrying sectors, enabling flexible control of the distance between tools on counter-rotating rolls to vary sheet length by reducing or increasing the peripheral speed of these sectors during the processing cycle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the diameter of counter-rotating rolls is fixed to accommodate specific sheet lengths, then the cutting and folding operation is reliable, but the adaptability to produce different sheet lengths is poor
Solution Approach 1:
The patent applies the dynamics principle by making the tool-carrying sectors rotatable about the roll axes, allowing their angular positions to be dynamically adjusted. This enables the distance between tools on opposite rolls to be varied, thereby producing different sheet lengths without changing the roll diameters, thus maintaining reliability while improving adaptability.
Solution Approach 2:
The patent applies parameter changes by enabling independent adjustment of the angular positions of tool-carrying sectors. By changing the angular parameters of the sectors, the effective working distance between tools is modified, allowing the same machine to produce various sheet lengths reliably.
2Adaptability or versatility
If interchangeable interleaving units are used to produce sheets of different length, then the adaptability to different formats is improved, but the device complexity and changeover time increase
Solution Approach 1:
The patent applies universality by designing a single interleaving unit with adjustable tool-carrying sectors that can perform multiple functions - producing various sheet lengths and formats. This eliminates the need for multiple specialized interchangeable units, reducing device complexity while maintaining adaptability.
Solution Approach 2:
The dynamic adjustability of sector positions allows one universal unit to replace multiple fixed units, simplifying the overall device structure while maintaining the ability to produce different sheet formats.
3Reliability
If cam mechanisms are used to control mobile sectors, then the folding operation is reliable, but the ease of operation and speed of format change are reduced due to rigid adjustment requirements
Solution Approach 1:
The patent replaces rigid cam mechanisms with dynamically adjustable motor-driven sector rotation. This allows flexible, independent positioning of tool-carrying sectors while maintaining reliable folding operation, significantly improving ease of operation and speed of format change.
Solution Approach 2:
The patent substitutes the mechanical cam control system with an electric motor-driven system that independently controls sector rotation. This replacement maintains operational reliability while dramatically improving the ease and speed of format changes.
4Manufacturing precision
If the circumferential distance between tools is fixed by roll diameter, then the manufacturing precision of sheet length is maintained, but the productivity and flexibility of production are reduced
Solution Approach 1:
By making the tool positions dynamically adjustable through sector rotation, the system maintains precise control over sheet length while enabling rapid reconfiguration for different production requirements, thereby improving both productivity and flexibility without sacrificing manufacturing precision.
Solution Approach 2:
The system changes the angular parameters of tool-carrying sectors to adjust effective tool spacing, maintaining manufacturing precision through controlled parameter adjustment while enabling flexible and productive production of various sheet formats.
Data Source
Figure 1~1A
Figure 2~3A
Figure 4a~4h
AI summary
An interleaving unit, comprising a pair of rolls (1, 2) set alongside one another and counter-rotating and provided with respective first and second folding tools (3, 4; 5, 6) set at a distance from one another along the circumferential development of the respective peripheral surfaces so as to operate in a common point of tangency (Z) on a succession of sheets (7a, 7b) fed between the two rolls, said tools (3, 4; 5, 6) being set on respective mobile cylinder sectors (8, 9, 10, 11) to enable positioning thereof at an adjustable distance apart along the circumferential development of a corresponding roll (1, 2), said interleaving unit comprising means (M1, M2, U) for independently adjusting the speed of rotation of one or more of said sectors according to their angular position in order to reduce or increase the peripheral speed of said sectors with respect to a speed of feed (Vm) of said sheets.