Wrapping Machine State Machine Control for Tray Variability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Automated wrapping machines face challenges in consistently wrapping trayed food products due to variability in film characteristics, tray conditions, and operator inputs, as well as normal wear and tear over time, which complicates the wrapping process and can lead to inefficiencies and potential product damage.
Innovation Solution
A closed-loop control system with feedback mechanisms is implemented, including sensors and encoders to monitor and adjust the wrapping process in sequential stages, ensuring each stage is complete before proceeding to the next, and adaptive slowing of the wrapping rate if components degrade, to maintain quality and prevent damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If automated wrapping machines operate at high speed to maintain productivity, then output increases, but the variability in film characteristics, tray conditions, and operator inputs causes wrapping quality to deteriorate and product damage to increase
Solution Approach 1:
The patent implements a closed-loop control system with multiple feedback arrangements including sensors that detect tray position, film tension, and wrapping stage completion. This feedback mechanism allows the control system to adjust operating parameters in real-time, maintaining wrapping quality consistency even at high speeds by compensating for variations in film characteristics, tray conditions, and product placement.
2Reliability
If the wrapping machine uses fixed sequential stages to ensure complete wrapping, then wrapping reliability improves, but the system becomes less adaptable to variations in tray size and weight
Solution Approach 1:
The patent employs a dynamic control system where the sequential wrapping stages are executed with adjustable parameters. The control system modifies film tension, gripper force, and stage timing based on real-time feedback about tray size and weight, allowing the fixed sequential structure to adapt to varying product characteristics while ensuring complete wrapping.
3Measurement precision
If the control system monitors all wrapping stages and component conditions, then detection precision improves, but device complexity increases
Solution Approach 1:
The patent divides the control system into modular feedback arrangements, each responsible for specific monitoring functions such as tray detection, film tension monitoring, and stage completion verification. This segmentation allows precise monitoring of individual parameters while keeping each control module relatively simple, with the overall system achieving high measurement precision through coordinated operation of multiple specialized sensors.
Data Source
AI summary
A wrapping machine for wrapping trayed food products includes a wrap station at which trayed food products are wrapped, a film dispensing station for drawing out film over trayed food products at the wrap station and a conveying system for moving trayed food products along a defined path from an input station to the wrap station. A controller is operatively connected to operate the conveying system, components of the film dispensing station and components of the wrap station. The controller is configured as a state machine with sequential wrap stages, where each wrap stage must successfully complete before the controller initiates a next wrap stage.