Tissue Paper Converting Line Thickness Control
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Solution Overview
Problem
Tissue paper converting lines face challenges in controlling production parameters to achieve consistent dimensions and thickness in finished rolls, leading to variations in diameter and thickness across the roll, affecting the quality of products like toilet paper and kitchen towels.
Innovation Solution
A tissue paper converting line equipped with an unwinder, rewinding machine, and a detection unit for measuring tissue paper thickness, along with a control system that adjusts production parameters such as winding density, embossing pressure, and paper tension to maintain the roll diameter within a tolerance range, ensuring consistent thickness and diameter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional converting lines are used without real-time thickness monitoring, then the production process is simpler and faster, but the dimensional consistency and thickness uniformity of finished rolls deteriorate
Solution Approach 1:
The patent implements a feedback control system where a detection unit measures tissue paper thickness in real-time during production, and a control system adjusts production parameters based on these measurements to maintain dimensional consistency. This closed-loop feedback mechanism directly resolves the contradiction by enabling precision control without requiring complete system redesign.
Solution Approach 2:
The patent replaces complex mechanical adjustment systems with an automated control system that uses detection units and actuators. This substitution reduces mechanical complexity while improving dimensional control, as the system uses sensors and automated actuators rather than manual mechanical adjustments.
2Manufacturing precision
If production parameters are adjusted frequently to compensate for thickness variations, then the dimensional accuracy of finished rolls improves, but the production speed and efficiency deteriorate
Solution Approach 1:
The patent maintains continuous production by implementing real-time detection and adjustment mechanisms that operate without interrupting the production flow. The detection unit continuously monitors thickness, and the control system continuously adjusts parameters, ensuring both high precision and sustained production speed throughout the manufacturing process.
Solution Approach 2:
The control system automatically adjusts production parameters based on real-time feedback from detection units without requiring manual intervention. This self-regulating capability maintains dimensional accuracy while preserving production speed, as the system corrects deviations automatically during continuous operation.
3Reliability
If real-time detection and control systems are implemented, then the quality consistency of finished products improves, but the production cost and system complexity increase
Solution Approach 1:
The patent employs a feedback control architecture where detection units provide real-time quality data to the control system, which automatically adjusts production parameters. This feedback mechanism ensures consistent product quality while managing system complexity through automated control rather than manual monitoring and adjustment.
Solution Approach 2:
The control system acts as an intermediary between the detection units and the production machinery, translating quality measurements into appropriate parameter adjustments. This intermediary layer simplifies the overall system architecture by centralizing the control logic and providing a clear interface between monitoring and execution functions.
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 the production of tissue paper rolls with consistent dimensions and thickness, improving the quality and consistency of finished products by dynamically adjusting production parameters based on real-time thickness measurements.
Implementation Method 1
at least one detection unit provided along the feeding path for detecting the thickness of the tissue paper fed along the feeding path in a feeding direction
Data Source
AI summary
A converting line for processing tissue paper includes an unwinder for unwinding reels of tissue paper; a rewinding machine for forming rolls of tissue paper; a feeding path between the unwinder and the rewinding machine, for at least one ply of tissue paper; along the feeding path, a first detection unit to detect the thickness of the tissue paper fed along the feeding path in a feeding direction; a control system, interfacing with the detection unit, and configured to act on at least one production parameter of the converting line based on the detected tissue paper thickness.