Bag Roll Winding Paths for Tension and Overlap Control
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Solution Overview
Problem
Existing bag-making machines face inefficiencies in winding and processing webs of material into pouches or bags, particularly in terms of tension control, overlap formation, and winding path diversion, which affect the quality and consistency of the final product.
Innovation Solution
The introduction of a winder system with a diverter mechanism that selectively diverts bags along different winding paths, combined with tension sensors and air systems to manage web tension, and spindles with vacuum holes for bag placement, enhances the winding process by ensuring consistent bag formation and overlap, improving the efficiency and quality of the bag rolls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single winding path is used for bag winding, then the device structure is simple, but the productivity is limited due to inability to process multiple bags simultaneously
Solution Approach 1:
The winding system is segmented into multiple independent winding paths (first winding path and second winding path), each capable of processing bags separately. This allows simultaneous winding of multiple bags on different spindles, thereby increasing productivity while maintaining manageable complexity through modular path design
Solution Approach 2:
The system transitions from a single linear winding path to a multi-dimensional winding architecture with parallel paths and multiple spindles. This dimensional expansion enables concurrent processing of multiple bags, significantly boosting throughput without proportionally increasing complexity
2Manufacturing precision
If web tension is not controlled, then the device structure is simple, but the manufacturing precision of bag overlap and formation deteriorates
Solution Approach 1:
A tension sensor is integrated into the web path to continuously monitor web tension and provide feedback to the control system. This enables real-time adjustments to maintain optimal tension levels, ensuring consistent bag overlap and formation precision without requiring overly complex mechanical tensioning mechanisms
Solution Approach 2:
The patent replaces purely mechanical tension control mechanisms with a sensor-based detection and control system. The tension sensor electronically monitors web tension and the control system adjusts parameters accordingly, achieving higher precision with less mechanical complexity
3Productivity
If manual bag placement on spindles is used, then the device structure is simple, but the productivity and consistency of bag rolls deteriorates
Solution Approach 1:
The system employs an automated mechanism where spindles with vacuum holes actively pull bags onto them through vacuum suction. This self-service approach eliminates manual placement, enabling high-speed automated winding while maintaining simplicity through the use of straightforward vacuum-based attraction rather than complex mechanical manipulation
4Productivity
If multiple spindles are used for parallel winding, then the productivity increases, but the device complexity and control difficulty increase
Solution Approach 1:
Multiple spindles are designed with identical structures and functions, each capable of independent bag winding. This universality allows the system to scale productivity by simply adding more identical units, reducing control complexity compared to managing fundamentally different components. The control system manages multiple identical modules through standardized protocols
Solution Approach 2:
The multi-spindle system is segmented into independent winding stations, each with its own spindle and vacuum system. This segmentation allows parallel operation of multiple identical units with relatively simple individual control, avoiding the complexity of highly integrated coordinated systems while achieving high productivity through parallelism
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 solution provides improved control over web tension and bag overlap, resulting in higher quality and more consistent bag rolls, enhancing the overall efficiency and productivity of the bag-making process.
Implementation Method 1
The spindle has a plurality of holes and the air system creates a vacuum that pulls air through the plurality of holes and pulls the leading bag onto the spindle
Data Source
AI summary
A machine for processing a web of material into bags includes several sections for processing the web of material into bags. An input section is configured to receive a roll of the web of material, a sealing section is configured to form seals in the web of material, and a winder section configured to wind the bags into rolls of bags may be included. A bander section configured to band each roll of bags may be included. A hem forming section configured to form a hem in the web of material may be included. A draw tape unwind station for unwinding draw tape for bags maybe included. Related methods are further disclosed.