Height-Adjustable Nozzle Box Support for Stretching Unit Maintenance
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Solution Overview
Problem
Nozzle boxes in stretching units are difficult to access and remove, leading to lengthy outage times when malfunctions occur, as they are typically mounted fixedly above and below the film and require removal of adjacent boxes for access.
Innovation Solution
A nozzle box device with a height-adjustable supporting system allowing individual lateral removal of nozzle boxes along the film transport system, featuring a first support that is adjustable between operating and assembly positions, and an actuation device for power-driven height adjustment, enabling quick installation and removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If nozzle boxes are mounted fixedly on supports above and below the film, then the structural stability is improved, but the accessibility for maintenance deteriorates and removal time increases
Solution Approach 1:
The support system is transformed from a fixed static structure to a dynamic adjustable structure. The height-adjustable support allows the nozzle box to be positioned at different heights: in the operating position it provides stable fixed mounting, and in the assembly position it lowers the nozzle box for easy accessibility. This dynamic adaptability resolves the contradiction between structural stability and maintenance accessibility.
2Stability of the object's composition
If nozzle boxes are mounted fixedly on supports, then the structural stability is improved, but the removal time and outage time increase
Solution Approach 1:
The height-adjustable support enables rapid repositioning of the nozzle box between operating and assembly positions. This dynamic capability allows maintenance personnel to quickly access and remove individual nozzle boxes without lengthy disassembly procedures, significantly reducing outage time while maintaining structural stability during operation.
3Stability of the object's composition
If multiple nozzle boxes are removed to access a malfunctioning box, then the structural stability is maintained, but the maintenance complexity and time increase
Solution Approach 1:
The support system is segmented into multiple independent height-adjustable supports, each capable of independent adjustment. This segmentation allows individual nozzle boxes to be accessed and removed independently without affecting the structural integrity or requiring removal of adjacent nozzle boxes, thereby reducing maintenance complexity.
4Manufacturing precision
If nozzle boxes are mounted in fixed positions, then the temperature control precision is improved, but the adaptability for different maintenance scenarios deteriorates
Solution Approach 1:
The height-adjustable support provides dynamic positioning capability that allows the nozzle box to be precisely positioned in the operating position for optimal temperature control precision, and then adjusted to the assembly position for easy maintenance access. This dynamic adaptability resolves the contradiction between precision and versatility.
Data Source
AI summary
A nozzle box device for an oven of a stretching unit is disclosed having a nozzle box and a supporting device for the nozzle box. The supporting device includes a first support and a second support. The first support is designed to be height adjustable in such a way that the nozzle box is adjustable between an operating position and an assembly position, wherein a first end of the nozzle box is situated lower in the assembly position than in the operating position.