Fibrous Web Cutting Nozzle Guide Trough Design
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Solution Overview
Problem
Existing fibrous web cutting devices are cumbersome, require complex hose management, and have limited flexibility, leading to reduced production efficiency and increased maintenance costs due to the need for precise control of high-pressure hoses during quick movements.
Innovation Solution
A device with a lighter structure featuring a guide trough for the pressurized medium line to form a U-shape loop, where the line's movement is synchronized with the carriage, eliminating the need for separate hose actuation mechanisms and allowing for quicker movements and reduced mass, thereby minimizing bending and wear on components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional hose management system is used with separate actuation mechanisms, then the high-pressure hoses can be controlled during carriage movement, but the device becomes cumbersome, complex, and requires more space
Solution Approach 1:
The invention extracts the separate actuation mechanisms for hose management and eliminates them entirely. The hose is allowed to move freely in the guide trough without separate feed or reeling mechanisms, simplifying the overall device structure while maintaining operational capability during carriage movement.
Solution Approach 2:
The guide trough is divided into a first section and a second section with different orientations. The first section extends substantially in the direction of carriage movement, while the second section extends substantially transverse to the direction of carriage movement. This segmentation allows the hose to be guided effectively through different movement phases without complex mechanisms.
2Reliability
If separate actuation mechanisms are used for hose feed and reeling, then hose control is precise, but the moving mass increases and maintenance requirements increase
Solution Approach 1:
The hose management system is designed to be self-service, where the hose automatically feeds and reels itself through the guide trough during carriage movement and return. The guide trough's geometry naturally guides the hose without requiring external actuation mechanisms, reducing maintenance requirements while maintaining reliability.
3Speed
If the beam structure is made lighter with smaller masses, then the carriage can move quicker with higher accelerations, but the structural strength may be compromised
Solution Approach 1:
The invention removes unnecessary masses from the beam structure by eliminating separate hose actuation mechanisms and heavy hose management components. The beam only needs to support the carriage and guide the hose passively through the guide trough, allowing for a lighter, more responsive structure with higher acceleration capabilities.
4Area of stationary object
If the device is designed to fit in limited machine space, then space utilization is improved, but the available space for hose management and carriage movement is reduced
Solution Approach 1:
The guide trough utilizes the transverse dimension by extending the second section substantially transverse to the direction of carriage movement. This allows the hose to be managed in a direction perpendicular to the carriage travel, effectively using available space in three dimensions rather than just along the linear path of movement, thereby improving space utilization while maintaining flexibility.
Data Source
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AI summary
A device for cutting a fibrous web by a pressurized medium, comprising: - a beam that is arranged essentially transversally to the direction of travel of the fibrous web; - a carriage that is adapted to move, to which a nozzle for cutting the fibrous web is attached; - a line (4) for conveying the pressurized medium to the nozzle the first end of the line (4) being adapted to be connected to a pressure feed and the second end of the line (4) being adapted to move in connection with the carriage. The device is characterised in further comprising a guide trough (13) for forming the guide of the line (4), that the line (4) is adapted to move in the guide trough as an essentially U-shape loop, when the distance between the first end and the second end changes according to the position of the carriage, and that the movement of the line is arranged to be provided by the movement of the carriage fitted in a linear module.