Coating Machine Liquid Chamber Segmentation
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Solution Overview
Problem
Coating machines face challenges in maintaining uniform film thickness and preventing pressure fluctuations when discharging coating material from multiple discharge ports, leading to coating unevenness on the surface.
Innovation Solution
The coating machine employs a configuration with multiple liquid chambers along the coating head, each supplied via independent branched channels, and a controlled system of discharge ports to manage pressure and discharge amounts uniformly across all ports.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If coating material is supplied to a single liquid chamber and discharged from multiple discharge ports, then the discharge rate can be increased, but pressure fluctuations occur and coating uniformity deteriorates
Solution Approach 1:
The single liquid chamber is divided into multiple liquid chambers (first, second, third liquid chambers), each supplied with coating material through independent supply channels. Each discharge port is associated with a specific liquid chamber, ensuring that discharge from multiple ports does not cause pressure fluctuations in a single chamber. This segmentation maintains constant discharge rates while enabling higher overall productivity.
2Area of stationary object
If multiple discharge ports are arranged along the sub-scanning direction, then coating width increases, but pressure distribution becomes uneven and coating uniformity deteriorates
Solution Approach 1:
Multiple discharge ports are distributed across multiple liquid chambers arranged in the sub-scanning direction, with each chamber independently supplied. This prevents pressure distribution issues that would occur in a single long chamber, as each chamber maintains uniform pressure despite the extended coating width.
Solution Approach 2:
Each liquid chamber is equipped with independent supply channels and flow control mechanisms, allowing local adjustment of coating material flow to ensure uniform discharge from all ports across the extended coating width.
3Productivity
If the number of discharge ports is increased, then coating efficiency improves, but pressure control becomes difficult and coating uniformity deteriorates
Solution Approach 1:
The coating head is divided into multiple liquid chambers with independent supply channels, allowing pressure control to be managed locally for each chamber rather than globally for all ports. This reduces the complexity of pressure control while enabling a higher number of discharge ports for improved coating efficiency.
Data Source
Figure 1A~1B
Figure 2
Figure 3
AI summary
[Problem] To suppress pressure fluctuations caused by coating material discharged from each of the discharge ports, so that a constant discharge amount of coating material can be discharged from each of the discharge ports. [Means for Solving] The coating machine 10 of the present invention is a coating machine that coats the coating surface of the object to be coated by means of coating material discharged from the coating head 30, characterized by having a plurality of liquid chambers 35 arranged along one direction of the coating head 30 and each supplied with coating material via an independent branched supply channel 42, and a plurality of discharge ports 36 provided for each liquid chamber 35