Fibrous Web Applicator Retraction Assembly for Automated Cleaning
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Solution Overview
Problem
Existing systems for applying process air to fibrous webs face issues with particle buildup on equipment, leading to decreased productivity due to manual cleaning requirements and machine shutdowns, and there is a need for a simpler, automated cleaning solution to maintain cleanliness.
Innovation Solution
A cleaning device for the applicator that includes an externally and internally positioned nozzle or spray bar system to apply liquid cleaning agents, allowing for automated removal of particles from the distribution plate surfaces without manual intervention, combined with a retraction mechanism to facilitate cleaning operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual cleaning of the applicator is performed, then particle buildup is removed, but machine shutdown occurs and productivity decreases
Solution Approach 1:
The cleaning device applies liquid to the distribution plate before particle buildup becomes excessive, preventing clogging and maintaining airflow. The retraction assembly moves the applicator away from the web during cleaning operations, allowing maintenance without full machine shutdown. This preliminary and preventive cleaning approach maintains productivity while ensuring applicator cleanliness.
Solution Approach 2:
The cleaning device is integrated into the applicator system itself, allowing the applicator to clean its own distribution plate without requiring external manual intervention. The system uses its own structure (envelope, retraction assembly) to facilitate self-cleaning, reducing the need for operator intervention and maintaining continuous operation.
2Ease of operation
If the applicator is retracted for cleaning, then cleaning access is improved, but cleaning time increases
Solution Approach 1:
The retraction assembly allows the applicator envelope to dynamically move between an operational position (close to the web for normal operation) and a cleaning position (retracted for cleaning access). This dynamic positioning provides easy access to the distribution plate for cleaning while minimizing the time the applicator is out of service, as the retraction and return movements are quick and controlled.
3Loss of energy
If process air is reused from one stage to another, then energy consumption is reduced, but particle buildup on equipment increases
Solution Approach 1:
The cleaning device extracts and removes particles and fibers that accumulate on the distribution plate surfaces through liquid application. This extraction of harmful particles prevents clogging of the distribution holes and maintains the efficiency of the process air reuse system, allowing continuous energy-saving operation without excessive particle buildup.
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 system effectively maintains applicator cleanliness, reduces downtime, and enhances productivity by enabling automated cleaning of the distribution plate, preventing particle clogging and ensuring continuous machine operation.
Implementation Method 1
A cleaning device for the applicator that includes an externally and internally positioned nozzle or spray bar system to apply liquid cleaning agents
Implementation Method 2
combined with a retraction mechanism to facilitate cleaning operations
Data Source
Figure 1A~1B
Figure 2
Figure 3~4
AI summary
The invention relates to a machine for producing a fibrous web, the machine comprising an applicator (7) for applying process air to a moving fibrous web manufactured by the machine, the applicator comprising an envelope (701) forming a cavity (702) adapted to receive the process air, the envelope being adapted to extend, with an envelope main extension, in a web width direction which is transverse to a direction of movement of the web, wherein the envelope comprises a distribution plate (703) presenting a plurality of distribution holes (704) to distribute the process air along the width of the web.