Stationary Spindle Winder with Over Speed Nip for Bag Machines
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Solution Overview
Problem
Existing bag machines with rotating turrets and single spindle winders are limited by complexity, speed, and compatibility with pneumatic devices, particularly unable to operate efficiently at higher speeds than 30 cpm and requiring servo-controlled devices for faster operations.
Innovation Solution
A winder with stationary spindles and an over speed nip system that includes adjustable over speed, elliptical orbit rods, and air nozzles for film direction, allowing for higher speed operation and easy air connections, capable of operating at 40 cpm with pneumatic devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a rotating turret with multiple spindles is used, then winding capacity is improved, but device complexity increases and compatibility with pneumatic devices deteriorates
Solution Approach 1:
The rotating turret is divided into multiple stationary spindles (first spindle, second spindle) that remain fixed in position. Each spindle operates independently without requiring rotation, simplifying the overall structure while maintaining multi-position winding capability. This segmentation eliminates the complex rotating mechanism while preserving the ability to wind at multiple locations.
Solution Approach 2:
Instead of rotating the turret to bring spindles to the winding position, the invention inverts the approach by making spindles stationary and using a moving winder head or film path to bring the film to each spindle in sequence. This inversion eliminates the rotating turret mechanism entirely while achieving the same functional result of multi-position winding.
2Adaptability or versatility
If a rotating turret is used, then multiple winding positions are achieved, but ease of operation deteriorates due to air connection difficulties
Solution Approach 1:
The air connection system is segmented into separate, fixed connections for each stationary spindle. This allows each spindle to have its own dedicated air supply without requiring complex rotating couplings or flexible hoses, greatly simplifying operation and maintenance of pneumatic devices.
Solution Approach 2:
The mechanical rotation system is replaced with a stationary spindle arrangement controlled by pneumatic devices. This substitution eliminates the need for mechanical air connections that would require rotation, using instead fixed pneumatic connections that are much easier to operate and maintain.
3Device complexity
If a single fixed spindle is used, then device complexity is reduced, but productivity deteriorates due to limited winding speed
Solution Approach 1:
Multiple stationary spindles are merged into a single winder system that shares common control, film handling, and support structures. This combination maintains structural simplicity while achieving higher productivity through parallel operation of multiple spindles, allowing simultaneous or alternating winding operations.
Solution Approach 2:
The system maintains continuous operation by having multiple spindles ready to wind, eliminating idle time when one spindle is being changed or serviced. While one spindle is operating, another can be prepared or a roll can be removed and replaced, ensuring the winding process continues without interruption and maintaining high productivity.
4Ease of operation
If stationary spindles are used, then ease of operation is improved with easy air connections, but adaptability to high speed operations deteriorates without servo control
Solution Approach 1:
Pneumatic devices are extensively used to control the stationary spindles, film divertors, and roll handling mechanisms. This pneumatic control system provides the speed and precision needed for high-speed operation (40 cpm and above) while maintaining the simplicity of stationary spindles with easy air connections, eliminating the need for complex servo mechanisms.
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 enables higher speed bag winding, reduced complexity, and improved compatibility with pneumatic devices, allowing for efficient operation at 40 cpm while maintaining ease of roll handling and inspection.
Implementation Method 1
an over speed nip system that includes adjustable over speed
Implementation Method 2
air nozzles for film direction
Data Source
Figure 1
Figure 2
AI summary
A winder (200) for a bag machine comprising an infeed nip defined between two infeed rollers (203,205), a first spindle (337), located along a first alternative film path, wherein after leaving the infeed nip the film can follow the first alternative film path nip to the first spindle to be wound about the first spindle, and a second spindle (338), located along a second alternative film path, wherein after leaving the infeed nip the film can follow the second alternative film path nip to the second spindle to be wound about the second spindle, wherein the winder further comprises an over speed nip defined between two over speed rollers (307,309), located along a film path, wherein the film moves from the infeed nip to the over speed nip, and then to one of the first and second alternative film paths.