Liquid Gasket Application Path for Stable Bead Shape
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Solution Overview
Problem
Conventional liquid agent application methods, such as FIPG and CIPG, face instability in application shape dimensions due to varying tapered shapes at the start and end positions, leading to inconsistent application results.
Innovation Solution
A method involving a liquid agent application system with a control unit that determines positions at a halfway point between the start and end positions, applying the agent in three processes: from the start to the first end, back to the second end, and finally to the end position, with adjustable application amounts to maintain constant height and reduce stringiness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional liquid agent application methods (FIPG/CIPG) are used, then the application process is simple, but the application shape dimensions are unstable due to varying tapered shapes at start and end positions
Solution Approach 1:
The application process is divided into multiple segments: a first application process from start position to halfway point, and a second application process from halfway point to end position. This segmentation allows different application parameters to be used in different regions, stabilizing the tapered shapes at both ends while maintaining process simplicity.
Solution Approach 2:
The application method dynamically adjusts the application amount based on position. The control unit varies the application amount between the first and second application processes to compensate for the different tapered shapes that naturally occur at the start and end positions, thereby stabilizing the overall application shape dimensions.
2Object-generated harmful factors
If the application amount is increased to reduce stringiness, then the application shape becomes more complete, but the tapered shapes at start and end positions become more pronounced, worsening dimension stability
Solution Approach 1:
Different application amounts are applied to different regions: a larger application amount is used in the first application process to reduce stringiness at the start position, while a smaller application amount is used in the second application process to minimize the tapered shape at the end position. This local quality adjustment resolves both issues simultaneously.
Solution Approach 2:
The application amount parameter is changed between the two application processes. By adjusting this parameter based on position, the method reduces stringiness where it occurs most while controlling the tapered shape formation, achieving both goals without contradiction.
3Productivity
If the application speed is increased to improve productivity, then more liquid agent can be applied faster, but the tapered shapes at start and end positions vary more, reducing application shape stability
Solution Approach 1:
The method performs a preliminary first application process that establishes a stable base layer with controlled tapered shapes at both ends. This preliminary action creates a foundation that allows the second application process to proceed at higher speeds without compromising the stability of the overall application shape.
Solution Approach 2:
The application speed is dynamically adjusted between the two processes. The first application process uses a controlled speed to establish stable tapered shapes, while the second application process can operate at higher speeds since the critical shape-defining regions have already been established. This dynamic speed adjustment maintains precision while improving productivity.
Data Source
AI summary
An application method of applying a liquid agent includes determining any one of positions of the liquid agent at a halfway part between a first end portion and a second end portion in a state in which an application is completed as each of an application start position and an application end position. The method includes applying the liquid agent from the application start position to the first end portion. The method includes turning back from the first end portion and applying the liquid agent to the second end portion, including superimposing, in a height direction, the liquid agent on previously applied liquid agent. The method includes turning back from the second end portion and applying the liquid agent to the application end position, including superimposing, in the height direction, the liquid agent on previously applied liquid agent.