| 摘要 |
PROBLEM TO BE SOLVED: To prevent ununiformity of a pattern by suppressing the change of the flow rate ratio with time to make the coating material stable supplied by instantaneously detecting the flow rate of a base coating material and a marker coating material to find the mixing ratio and controlling the pressure of one of the coating materials. SOLUTION: The pattern coating system is provided with a base supply line B composed of a base toning can 6, a supply pump 7, a base pressure tank 8 and a maker supply line C composed of a marker toning can 14, a supply pump 15 and a marker pressure tank 16, and each coating material is supplied to a die coater coating device E through liquid supply pipes 10, 18. In such a case, the pressure necessary to supply each coating material to the coating device E is formed in a liquid supply power line A and air is fed to each supply line B, C through air feed lines 4, 5. And, a liquid supply control line D is provided to detect the flow rate of each coating material and to obtain the flow rate ratio and the feed air to the marker supply line C is controlled by a controller 23 based on the resultant flow rate ratio to continuously keep the flow rate ratio at the proper value.
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