Rolled Stock Sensor Assembly for Low-Waste Web Splicing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing systems for unwinding rolled stock suffer from significant waste due to variable placement of markings on the medium, leading to inefficient splicing and manual intervention, resulting in up to 3% waste of the remaining medium on the core.
Innovation Solution
A sensor assembly is used to detect the quantity of rolled stock on the core, communicating with a manual splice actuation system to initiate a splice when a predetermined threshold is reached, reducing reliance on manufacturer markings and minimizing waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manufacturer markings are used to indicate low roll diameter, then splicing can be initiated, but the variable placement of markings leads to significant waste of medium on the core
Solution Approach 1:
The patent replaces the mechanical/manual method of placing physical markings on the medium with an optical sensing system. The sensor assembly detects the core diameter by measuring the distance between the sensor and the core surface, eliminating reliance on manufacturer-applied markings and enabling precise, consistent detection of when to initiate splicing.
Solution Approach 2:
The system implements continuous feedback by monitoring the distance between the sensor and the core surface in real-time. When the detected distance indicates a predetermined low roll diameter threshold has been reached, the system triggers the splicing operation, ensuring optimal timing and minimizing waste.
2Ease of operation
If manual splicing is performed when medium runs out, then the next roll can be spliced in, but this results in labor-intensive operations and system downtime
Solution Approach 1:
The system performs preliminary detection of the core diameter continuously during unwinding, identifying the optimal splicing point before the medium is completely depleted. This allows operators to prepare and execute splicing at the most efficient moment, minimizing downtime and avoiding the need for emergency manual intervention when the roll is exhausted.
3Reliability
If a safe amount of medium is left on the core, then the roll will not run out before splicing, but this creates unusable waste
Solution Approach 1:
The patent replaces the conservative, marking-based approach with precision optical sensing that can accurately determine the exact moment when the core diameter reaches the splicing threshold. This eliminates the need to maintain a large safety margin, allowing the system to operate reliably with minimal waste while avoiding roll failure.
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 system effectively reduces rolled stock waste by ensuring timely splicing, maintaining a continuous unwinding process, and optimizing the use of the remaining medium on the core.
Implementation Method 1
a sensor configured to detect a first roll of stock unwinding from a core
Data Source
AI summary
A sensor assembly configured to detect rolled stock on a core includes a sensor configured to detect a first roll of stock unwinding from a core, the stock unwinding from the core of the first roll is supplied as a web of stock, wherein in response to the sensor detecting a first detection configuration, the sensor takes no action and continues to detect the first roll, and wherein in response to the sensor detecting a second detection configuration, the sensor provides a command to a splice assembly to transition to a second roll of stock to replace the first roll of stock.