Web Decurling System for Pressware Production
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Solution Overview
Problem
Current methods for producing pressware from materials like paper are prone to jams due to intrinsic curling, requiring manual adjustment and expensive labor, and limit production rates to single rows of products per machine stroke.
Innovation Solution
A system comprising rollers, a decurling station actuator, a sensor, and a controller that adjusts the angle of the web path based on sensor data to counteract curling, enabling increased production rates and reducing labor costs by automating the decurling process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual adjustment of decurling rollers is used, then curl compensation can be achieved, but labor costs increase and human error causes jams
Solution Approach 1:
The system uses sensors to automatically detect web curl characteristics and a controller to autonomously adjust decurling roller positions, eliminating the need for manual operator intervention. The system serves itself by continuously monitoring and self-correcting curl issues, thereby reducing labor costs and human error while maintaining high reliability.
Solution Approach 2:
The patent implements a closed-loop feedback system where sensors detect web characteristics, the controller processes this information, and automatically adjusts roller positions to counteract curl. This continuous feedback mechanism ensures reliable operation by dynamically responding to changing web conditions without manual intervention.
2Productivity
If single row transport is used, then simplicity is maintained, but production rate is limited to four or five parts per stroke
Solution Approach 1:
The patent transitions from single-row to multi-row web transport, adding a dimensional aspect to the production system. By transporting multiple rows of blanks simultaneously through the forming station, the system achieves parallel processing of multiple products per stroke, significantly increasing productivity while managing complexity through systematic design.
Solution Approach 2:
The web is divided into multiple rows of individually scorable blanks that can be processed in parallel. This segmentation allows the forming station to create multiple products simultaneously from different rows, thereby increasing production rate without proportionally increasing overall system complexity.
3Quantity of substance
If paper rolls with small diameter are used, then material storage is efficient, but intrinsic curl increases causing jams
Solution Approach 1:
The decurling rollers are positioned and adjusted before the web enters the forming station to pre-counteract the intrinsic curl developed during storage. This preliminary action removes the harmful curl effect before processing, allowing efficient use of small-diameter rolls without compromising reliability.
Solution Approach 2:
The system applies a counteracting force through adjusted roller positions that opposes the intrinsic curl of the paper web. This preliminary anti-action prevents curl-induced jamming by neutralizing the curl effect before it causes problems during transport and processing.
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 jam frequency and increases production rates by automatically adjusting for curling, allowing for multiple products to be processed per machine stroke without manual intervention, thus enhancing efficiency and reducing labor costs.
Implementation Method 1
The sensor is configured to sense a characteristic of the roll of material and generate sensor data
Implementation Method 2
The decurling station actuator is configured to shift one of the rollers relative to the other rollers to adjust the angle of the path
Implementation Method 3
The rollers are configured to pull the web along a path with an angle
Data Source
AI summary
A system for decurling a web from a roll of material comprises rollers, a decurling station actuator, a sensor, and a controller. The rollers are configured to pull the web along a path with an angle. The decurling station actuator is configured to shift one of the rollers relative to the other rollers to adjust the angle of the path. The sensor is configured to sense a characteristic of the roll of material and generate sensor data. The controller is configured to receive a signal representative of the sensor data and direct the decurling station actuator to shift one of the rollers based at least in part on the sensor data.