Coating Die Head Alignment for Stable Back Roll Gap Control
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Solution Overview
Problem
The position change of the coating die head relative to the back roll, particularly due to environmental factors, leads to unstable coating stability and potential scratching or breakage of the base material, affecting the normal operation of battery production.
Innovation Solution
A detection assembly with range finders and a level is integrated into the coating equipment to detect the parallelism and gap between the coating die head and the back roll in real time, allowing for timely adjustments through an adjusting mechanism to maintain stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sensor-based alignment is used to detect position changes, then the ability to detect position change is improved, but the complexity of the device increases
Solution Approach 1:
The patent replaces complex sensor-based detection systems with a simplified optical measurement system using a laser ruler and level. The laser ruler measures the distance between the coating die head and back roll, while the level detects parallelism, substituting mechanical/sensor complexity with optical measurement principles that achieve high precision with fewer components.
Solution Approach 2:
The patent introduces a level as an intermediary measurement tool between the coating die head and back roll. The level provides a reference plane that enables accurate parallelism measurement without requiring complex direct sensing between the two components, simplifying the overall detection system.
2Reliability
If real-time detection of parallelism and gap is implemented, then coating stability is improved, but the device complexity increases
Solution Approach 1:
The patent divides the detection function into two independent measurement systems: one for detecting the gap distance between coating die head and back roll, and another for detecting parallelism. This segmentation allows each subsystem to be simple and specialized, while together they provide comprehensive real-time detection that ensures coating stability.
Solution Approach 2:
The patent uses optical measurement tools (laser ruler and level) to replace complex mechanical sensing systems. The laser ruler provides real-time gap measurement through optical time-of-flight or phase shift methods, and the level uses optical or gravitational reference to detect parallelism, achieving reliable real-time detection without mechanical complexity.
3Measurement precision
If the range finders are arranged on both end parts of the coating die head, then measurement accuracy is improved, but the ease of maintenance deteriorates
Solution Approach 1:
The patent positions the range finders on the end parts of the coating die head along the length direction, utilizing the spatial dimension to maximize the baseline distance between measurement points. This dimensional arrangement improves parallelism measurement accuracy by providing a longer measurement baseline, while the level is positioned on the side surface to provide maintenance accessibility from a different spatial direction.
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
Ensures accurate and efficient measurement of parallelism and gap, preventing coating instability and ensuring consistent production by allowing for immediate corrective actions.
Implementation Method 1
The range finders determines the parallelism by detecting a distance between the back roll and the range finders
Data Source
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AI summary
Disclosed is a coating equipment (1000). The coating equipment (1000) includes a back roll (100), a coating die head (200), and a detection assembly (300). The coating die head (200) has a coating opening (210) facing towards the back roll (100), and the coating opening (210) extends in an axial direction of the back roll (100). The detection assembly (300) is configured to detect a position of the coating die head (200) relative to the back roll (100). The detection assembly (300) includes a level (310) mounted on the coating die head (200).