Coating Apparatus with Pressure-Based Air Bubble Detection
Solution Overview
Problem
Existing coating apparatuses fail to sufficiently remove air bubbles from the coating material, leading to coating unevenness and unnecessary consumption of material during trial coatings.
Innovation Solution
A coating apparatus equipped with a volume changing device, pressure sensor, and control unit that determines dischargeability based on pressure changes, allowing for air bubble removal through circulation or external discharge, thereby enabling efficient coating without trial runs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If trial coating is performed to check for air bubbles, then coating quality can be ensured, but additional coating material is consumed
Solution Approach 1:
The system performs preliminary detection of air bubbles in the supply passage before actual coating begins. By using a detection device to identify air bubbles ahead of time and automatically removing them through the removal device, the system ensures coating quality is maintained without needing to perform trial coating, thus preventing unnecessary material consumption.
2Productivity
If air bubbles are not removed from the coating material, then the coating process can proceed continuously, but coating unevenness occurs
Solution Approach 1:
The system employs a detection device that continuously monitors the supply passage for air bubbles and provides feedback to the control device. When air bubbles are detected, the control device automatically activates the air bubble removal device to eliminate them, ensuring coating uniformity is maintained without interrupting the overall coating process continuity.
3Reliability
If air bubble removal processing is executed, then dischargeability can be improved, but additional processing time is required
Solution Approach 1:
The system automatically detects air bubbles and triggers the removal process without requiring manual intervention or separate quality check steps. The integrated detection and removal system handles air bubble elimination as an automatic self-service function, improving dischargeability while minimizing additional processing time through streamlined automated operation.
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
Enables accurate determination of discharge readiness, reducing material waste and ensuring uniform coating by effectively removing air bubbles.
Implementation Method 1
determine whether the coating material is dischargeable from the die head by change in the pressure when the volume change is imparted to the supply passage
Implementation Method 2
a pressure sensor for detecting pressure of internal space of the die head
Data Source
AI summary
The coating apparatus includes a coating unit having a tank containing a coating material, a die head for discharging the coating material, a supply passage constituting a channel from the tank to the die head, a volume changing device for imparting a volume change to the supply passage, and a pressure sensor for detecting a pressure in an internal space of the die head, and a control unit for controlling an operation of the coating unit. The control unit is configured to determine whether or not the coating material can be ejected from the die head based on a change in pressure when a volume change is applied to the supply passage by the volume changing device, and start ejecting the coating material to the object to be coated when the ejection is possible.