Screen Coating Jig Structure for Uniform Sealing Across Protrusions
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Solution Overview
Problem
Existing screen-coating technologies for plate-shaped members with protrusions fail to ensure uniform height of sealing members, which is crucial for maintaining sealing properties, particularly in fuel cell applications where uneven surfaces and varying pressures can lead to leakage.
Innovation Solution
A screen coating jig with a jig body of higher rigidity than the sealing member, featuring a first surface with recesses fitted to protrusions and pair of dividing surfaces extending from the first surface to a second surface, ensuring a uniform height and width of the sealing member across the protrusions, preventing excessive application and maintaining uniform sealing properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a screen coating jig is used to apply sealing member on plate-shaped member with protrusion, then sealing member can be applied to cross the protrusion, but the height of sealing member becomes uneven
Solution Approach 1:
The jig body is divided into multiple portions by dividing surfaces that extend from the first surface to the second surface. These dividing surfaces create separate regions (first portion and second portion) that can independently control the sealing member application over different areas of the plate-shaped member, including protrusions, ensuring uniform height across the entire sealing member.
Solution Approach 2:
The jig body is designed with varying width at different locations to match the local requirements of the plate-shaped member. The width between dividing surfaces is narrower at positions corresponding to protrusions and wider at other positions, allowing the sealing member to maintain uniform height while adapting to the local geometry of the substrate.
2Manufacturing precision
If the width of jig body is reduced at protrusion position to maintain uniform sealing member height, then sealing precision improves, but the jig body becomes more complex
Solution Approach 1:
The jig body is pre-designed with the optimized width profile before the coating process. The width between dividing surfaces is predetermined to be narrower at protrusion positions and wider at other positions, so that when the sealing member is applied, it automatically achieves the desired uniform height and consistent width without requiring real-time adjustments during the coating process.
3Measurement precision
If recesses are added to fit protrusions for precise positioning, then positioning accuracy improves, but manufacturing complexity of jig increases
Solution Approach 1:
The first surface of the jig body is divided into multiple recesses by the dividing surfaces, with each recess corresponding to a protrusion on the plate-shaped member. These recesses provide precise positioning for each protrusion while the overall segmented structure allows for relatively simple manufacturing compared to creating a completely custom-fit rigid mold.
Data Source
AI summary
Screen coating jig for screen-coating surface of plate-shaped member having protrusion to cross protrusion with sealing member, including: jig body having higher rigidity than sealing member to be placed on surface of plate-shaped member. Jig body includes: first surface facing surface of plate-shaped member; second surface on opposite side of first surface; and pair of dividing surfaces extending from first surface to second surface and dividing at least part of jig body into first portion and second portion. First surface includes recess to be fitted to protrusion of plate-shaped member starting from intersection portions with pair of dividing surfaces. Pair of dividing surfaces has uniform height from first surface to second surface. Width between pair of dividing surfaces is narrowed at position corresponding to recess.