Wiping Device Nozzle Mask Rotation for Plating Uniformity
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Solution Overview
Problem
In hot-dip plating devices, the existing wiping nozzles face issues with edge overcoat and splash due to misalignment between the wiping nozzle and the nozzle mask, leading to uneven plating thickness and metal splashing, especially when handling steel sheets of different widths or during maintenance, where the nozzle mask and wiping nozzle can become inclined, causing the mask to fail in covering the nozzle port effectively.
Innovation Solution
A wiping device with a rotating pin and arm mechanism that adjusts the nozzle mask's orientation to match the wiping nozzle's inclination, ensuring consistent coverage of the nozzle port, combined with a spring mechanism to maintain the mask's position close to the nozzle and prevent gas-induced displacement, and a bolt fixation for precise angle adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the nozzle mask is adjusted to cover the wiping nozzle for different steel sheet widths, then the coverage of the nozzle port is improved, but the alignment between the nozzle mask and wiping nozzle becomes inaccurate due to inclination
Solution Approach 1:
The nozzle mask is designed with rotational freedom around the wiping nozzle, transforming it from a static component to a dynamic one that can automatically adapt its orientation. This allows the mask to maintain proper alignment regardless of the steel sheet width or wiping nozzle position, eliminating the need for complex manual adjustment while preserving coverage accuracy.
2Manufacturing precision
If the wiping nozzle is positioned to handle edge portions, then the plating uniformity is improved, but the nozzle mask becomes misaligned causing edge overcoat or splash
Solution Approach 1:
The nozzle mask is designed to self-align with the wiping nozzle through rotational movement. When the wiping nozzle is positioned to handle edge portions, the mask automatically rotates to maintain proper alignment, eliminating the need for external adjustment mechanisms and ensuring consistent coverage without edge overcoat or splash.
3Reliability
If the nozzle mask is fixed in position, then the alignment is maintained, but the mask cannot adapt to different steel sheet widths requiring repositioning
Solution Approach 1:
The nozzle mask is designed with rotational freedom around the wiping nozzle, transforming it from a static component to a dynamic one that can automatically adapt its orientation. This allows the mask to maintain proper alignment regardless of the steel sheet width or wiping nozzle position, eliminating the need for complex manual adjustment while preserving coverage accuracy.
Data Source
AI summary
A wiping device 14 includes a pair of wiping nozzles 141, a nozzle mask 142, a rotating pin 1431a, a holding portion 1431b, and an arm portion 1432. The pair of wiping nozzles 141 is disposed such that nozzle ports 141a face each other, the nozzle mask 142 is disposed at both ends of the nozzle ports 141a of the wiping nozzles 141, the rotating pin 1431a is connected to an upper portion of the nozzle mask 142, the holding portion 1431b holds the rotating pin 1431a, the arm portion 1432 fixes the holding portion 1431b from above, and the rotating pin 1431a is rotatable around an axis and adjusts the position of the nozzle mask 142.