Screen Print Mask Cleaning via Segmented Paper Winding
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Solution Overview
Problem
Existing screen print systems inadequately clean masks with convex portions, leading to reduced precision in screen printing due to paste residue being rubbed between convex portions during the cleaning process.
Innovation Solution
A screen print system with a first and second cleaning unit, where the paper member is wound up after removing paste from one convex portion to prevent it from contacting the next, ensuring thorough cleaning and maintaining precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the paper member is sequentially brought into contact with lower surfaces of respective convex portions to clean the mask, then the cleaning process covers all convex portions, but the paste removed from the preceding convex portion is rubbed against the next convex portion, making cleaning inadequate and worsening screen printing precision
Solution Approach 1:
The cleaning process is segmented into discrete steps where the paper member contacts one convex portion at a time. After cleaning each convex portion, the paper member is wound up to advance to the next convex portion, ensuring that cleaned areas are not re-contaminated by paste transferred from previously cleaned portions.
Solution Approach 2:
The paper member is wound up in advance after cleaning one convex portion and before contacting the next convex portion. This preliminary action prevents paste from being transferred to the next convex portion, ensuring that each convex portion is cleaned with a fresh paper surface.
2Productivity
If the paper member continuously contacts multiple convex portions during cleaning, then the cleaning process is efficient and quick, but paste residue is transferred between convex portions reducing cleaning quality
Solution Approach 1:
The cleaning process uses periodic action where the paper member is wound up at regular intervals after cleaning each convex portion. This periodic winding up maintains cleaning efficiency while preventing paste transfer, as the paper member is refreshed periodically rather than continuously.
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 cleans the mask surfaces, enhancing the accuracy of screen printing by preventing paste residue from being transferred between convex portions, thus ensuring a more precise printing process.
Implementation Method 1
the paper member is sequentially brought into contact with lower surfaces of the respective convex portions... removing paste adhering to the lower surfaces of the respective convex portions
Data Source
AI summary
It is an objective to provide a screen print system and a method for cleaning a mask of the screen print system that enable sufficient cleaning of the mask used for subjecting a cavity substrate to screen printing. A mask contact area R of a paper member 42 is brought into contact with a lower surface of one of convex portions 13t of a first mask 13a, thereby removing paste Pst adhering to the lower surface. Subsequently, the paper member 42 is winded up before the paper member 42 contacts the next convex portion 13t to be subjected to removal of the paste Pst, thereby updating the mask contact area R.