Paper Log Rewinder Optical Position Control
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Solution Overview
Problem
The production of paper logs faces challenges due to position errors caused by surface wear of winding rollers and debris, which affect the winding process and require manual operator expertise to maintain consistent quality.
Innovation Solution
A control system that automatically adjusts the speed of winding rollers based on the actual position of the logs within the rewinder, using optical devices to detect deviations from theoretical positions and modify the angular speed of the rollers to correct errors, ensuring consistent log formation and expulsion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual operator control is used to maintain log position, then operational flexibility is maintained, but manufacturing precision deteriorates due to surface wear and debris on winding rollers
Solution Approach 1:
The patent implements an optical detection system that continuously monitors the actual position of logs during winding and provides feedback to a control unit. The control unit compares the actual position with the theoretical position and automatically adjusts the angular speed of winding rollers to correct any deviations, ensuring consistent manufacturing precision regardless of roller surface conditions.
Solution Approach 2:
The patent replaces manual mechanical control with an automated optical-mechanical control system. Optical detection devices measure log position, and the control unit automatically adjusts roller speeds, eliminating the need for manual operator intervention and maintaining consistent precision despite roller wear or debris accumulation.
2Manufacturing precision
If automated optical control system is implemented, then manufacturing precision is improved and operator independence is achieved, but device complexity increases
Solution Approach 1:
The patent replaces complex manual control procedures with a streamlined optical-mechanical automated system. The optical detection devices and control unit work together to automatically monitor and adjust log position, simplifying the operational complexity while improving manufacturing precision and eliminating dependence on operator expertise.
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 provides a constant and operator-independent control of the rewinding process, reducing errors and maintaining quality over time, while being cost-effective and utilizing commercially available optical devices.
Implementation Method 1
a) optical means (5) capable of detecting, at a predetermined detection time, an actual position of said log
Data Source
AI summary
Rewinder for making paper logs, including a winding station with a first winding roller and a second winding roller delimiting a nip and a third winding roller downstream of the other rollers. The rewinder includes optical elements for detecting, at a predetermined time, an actual position of each log in said winding station and an electronic unit connected to the optical elements and programmed to compare the actual position with a theoretical position of the log at the time, the electronic unit being connected to at least one motor driving the rollers and programmed to modify the speed of the at least one motor when a deviation between the actual and theoretical positions exceeds a pre-established value, the electronic unit being also programmed to operate said optical elements at the time.