Metering Nozzle Residue Stripping With Segmented Rotation
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Solution Overview
Problem
Existing methods for stripping material residue from metering nozzles are costly, unsafe, and inefficient, often leading to contamination due to uncontrolled adhesion and requiring frequent cleaning or replacement of stripping elements.
Innovation Solution
A rotating stripping element with a closed rotational movement and a separating unit that mechanically separates material residue in a hardened state, allowing continuous operation and reducing downtime.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a tensioned wire is used as a stripping element, then the material residue can be stripped from the metering nozzle, but the wire requires frequent cleaning or replacement leading to high equipment costs
Solution Approach 1:
The stripping element is divided into multiple segments arranged one behind the other in the circumferential direction. Each segment can independently receive and carry material residue to the separating position, allowing continuous operation without cleaning or replacement of the entire stripping element
Solution Approach 2:
The closed rotational movement ensures that while one segment is being used for stripping, other segments are already carrying residue to the separating position or returning to the stripping position. This continuous cycle eliminates downtime for cleaning or replacement
2Reliability
If the wire is heated to burn material residues, then stripping effectiveness is improved, but toxic gases are produced and combustion risk increases
Solution Approach 1:
The thermal method (heating to burn) is replaced with a mechanical method (rotational stripping followed by mechanical separation). The stripping element mechanically removes and transports the material residue to a separating position where it is mechanically separated, eliminating the need for combustion and associated harmful effects
Solution Approach 2:
The harmful thermal process is completely extracted from the system. Instead of using heat to remove material residue, the invention uses a purely mechanical process of stripping, transporting, and separating the residue, thereby eliminating toxic gas production and combustion risks
3Reliability
If the metering nozzle is guided over the stripping wire with lateral offset, then collision with residual material is prevented, but the stripping process becomes more complex
Solution Approach 1:
The stripping element is segmented into multiple independent units arranged circumferentially. Each segment independently performs the stripping function, eliminating the need for complex lateral offset guidance while maintaining reliability through redundant stripping surfaces
Solution Approach 2:
Instead of moving the metering nozzle laterally to avoid residual material (complex guidance), the invention keeps the nozzle in a fixed position and uses the rotational movement of the segmented stripping element to bring fresh segments into contact with the nozzle for each stripping cycle
4Reliability
If material residue is stripped after each metering process, then contamination is prevented, but the stripping element requires frequent cleaning leading to downtime
Solution Approach 1:
The stripping element consists of multiple segments that can be continuously rotated. While one segment is being used for stripping, other segments are already transporting or have transported residue to the separating position, enabling continuous operation without downtime for cleaning
Solution Approach 2:
The closed rotational movement creates a continuous cycle where segments are constantly being reused after separation. This ensures uninterrupted stripping operation, maintaining contamination prevention while maximizing equipment uptime through seamless continuous operation
Data Source
AI summary
The invention relates to a method for stripping a material residue from a metering nozzle, wherein the metering nozzle with the material residue is guided past a stripping element such that the material residue comes into contact with the stripping element and is stripped from the metering nozzle, characterized in that the stripping element performs a closed rotational movement by means of which a segment of the stripping element first of all reaches a stripping position, in which the material residue is stripped from the metering nozzle and at least some of the material residue remains adhering on the segment, is then guided with the material residue adhering thereon to a separating position, in which a separating unit is used to separate the material residue from the segment of the stripping element, and is guided back to the stripping position to receive a further material residue. Furthermore, the invention also relates to a device for stripping the material residue.