Cylindrical Member Coating Slit Cleaning Method
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Solution Overview
Problem
Existing methods for manufacturing cylindrical members with a coating on a mandrel using a ring-shaped coating head face inefficiencies due to coating liquid adhering to the annular slit, requiring frequent changes of detachable ring members and additional mechanisms for attachment and detachment, which increases costs and complexity.
Innovation Solution
A method involving a circular cleaning blade mounted on a lower holding shaft, which is rotated to pass through the annular slit after coating, effectively removing excess coating liquid without the need for detachable ring members, allowing for reuse and reducing the number of coating steps and device size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a detachable ring member is used to clean the annular slit, then coating liquid can be removed from the slit, but the ring member needs to be changed for each application and requires attachment/detachment mechanisms
Solution Approach 1:
The cleaning function is merged with the coating application process by using the same ring-shaped coating head structure to perform both coating and cleaning operations. The coating head remains attached to the device body while the mandrel is moved through it for cleaning, eliminating the need for detachable cleaning members and their associated mechanisms.
Solution Approach 2:
The ring-shaped coating head is designed to serve multiple functions: it applies coating liquid to the mandrel during coating operations and also serves as the cleaning structure by which the mandrel is passed through to remove excess coating. This multi-functionality eliminates the need for separate detachable cleaning components.
2Reliability
If a detachable ring member is used for cleaning, then coating liquid is removed, but one application requires one ring member increasing costs
Solution Approach 1:
The cleaning function is merged with the coating application process by using the same ring-shaped coating head structure to perform both coating and cleaning operations. The coating head remains attached to the device body while the mandrel is moved through it for cleaning, eliminating the need for detachable cleaning members and their associated mechanisms.
Solution Approach 2:
The invention eliminates the use of disposable detachable ring members entirely. Instead, a permanent, reusable ring-shaped coating head is used that can be cleaned repeatedly without being discarded after each use, significantly reducing material consumption and costs.
3Reliability
If coating liquid adheres to the annular slit, then cleaning is required, but intermittent application becomes inefficient
Solution Approach 1:
The cleaning operation is integrated into the coating process flow without requiring separate steps or stopping the coating head. The mandrel is continuously moved through the coating head for both coating application and subsequent cleaning, maintaining continuous useful action and improving productivity during intermittent applications.
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
This solution enables efficient cleaning of the annular slit without changing components between each use, reducing costs and simplifying the process, while maintaining effective coating quality on the cylindrical members.
Implementation Method 1
the coating liquid adheres to and remains on around the slit
Data Source
AI summary
The present invention has an object to provide a method for manufacturing a plurality of high quality cylindrical members. The method includes: vertically holding a mandrel so as to be coaxial with a central axis of an annular slit; and discharging a liquid coating through the slit to form a film of the coating on a surface of the mandrel while vertically moving up the mandrel. A circular cleaning blade is rotatably mounted around a lower holding shaft. The step includes the steps of: (1) forming a film of the coating up to a lower end of a coating region of the mandrel, and then stopping the discharge; and (2) moving up the lower holding shaft so that the cleaning blade passes through the annular slit to clean it, in this order. Then the cleaning blade is rotated to clean the cleaning blade.