Rolled Stock Core Detection for Precise Automatic Splicing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing systems for unwinding rolled stock result in significant waste due to variable marking placement and manufacturer incentives leading to excessive material left on the core, causing labor-intensive manual splices and system downtime.
Innovation Solution
A sensor assembly that detects the core and initiates a splice to a new roll when a predetermined quantity of stock remains, eliminating variability and reducing waste by ensuring a continuous unwinding process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a UV sensor detects a physically placed marking on the medium to initiate splice, then the splice timing can be determined, but the marking placement variability causes significant waste of rolled medium remaining on the core
Solution Approach 1:
The patent extracts the detection function from relying on externally placed markings and instead uses an optical sensor to directly detect the core characteristics (such as the cardboard tube's reflective properties) to determine when the medium is depleted. This eliminates dependence on manufacturer-placed markings and enables precise detection of the actual medium endpoint.
Solution Approach 2:
The system implements feedback by continuously monitoring the optical properties of the unwinding medium and comparing them against threshold values that indicate core exposure. This closed-loop feedback mechanism allows the system to automatically initiate splice operations at the optimal moment, maximizing medium utilization while preventing runout.
2Reliability
If manufacturers place markings with a safe amount of medium remaining on the core to avoid running out, then system downtime is avoided, but a substantial amount of medium (up to 3%) becomes unusable waste
Solution Approach 1:
The system performs preliminary detection of core characteristics before the medium is completely depleted. By detecting the core's optical properties in advance and initiating splice operations proactively, the system avoids both the runout condition and the need to conservatively leave excessive medium on the core.
Solution Approach 2:
The detection system uses the core itself (the cardboard tube) as the detection target, eliminating the need for external markings. The core's inherent optical properties serve as the signal for medium depletion, allowing the system to self-determine the optimal splice point without relying on manufacturer-placed indicators.
3Ease of operation
If manual splicing is performed when the medium runs out on the core, then labor and time are required for the splice operation, but the system downtime increases
Solution Approach 1:
The system initiates the splice operation in advance by detecting core characteristics before medium depletion occurs. This preliminary detection and proactive splice initiation eliminates the need for emergency manual intervention when the medium runs out, thereby reducing both labor requirements and system downtime.
Solution Approach 2:
The patent replaces manual mechanical splicing operations with an automated detection and control system. The optical sensor detects core exposure and triggers automated splice mechanisms, eliminating the need for manual labor and reducing the time required for splice operations.
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
Reduces rolled stock waste by up to 3% by accurately detecting the core and transitioning to a new roll, minimizing manual splices and downtime.
Implementation Method 1
a sensor configured to detect a first roll of stock unwinding from a core
Data Source
Figure 1
Figure 2
Figure 3
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.