| 摘要 |
PROBLEM TO BE SOLVED: To provide a coating method and apparatus, in which coating material utilization efficiency and the degree of labor saving are improved, the reduction of cost and the improvement of quality are attained by sucking a coating material into a vacuum vessel and applying on the outside and inside surface of a pipe material or the like to be coated, working environment is improved by forming a closed coating system and environmental clean-up is developed by using a non-solvent based coating material. SOLUTION: In the method and the apparatus for coating the inside and the outside surface of the pipe material or the like to be coated by mounting the previously heated material to be coated in the vacuum vessel and sucking the coating material under vacuum, a coating film having a smooth surface and free from defects is formed on the inside and the outside surface of the pipe material or the like to be coated, the coating film thickness is controlled and a task of discharging the excess coating material is attained by providing a plurality of coating material supply ports and a plurality of suction ports for sucking the outside air or an inert gas and controlling each flow rate.
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