| 摘要 |
A method and apparatus for coating articles with a layer of plastic in which drippage of excess coating material onto the freshly coated articles is eliminated. A plurality of liquid plastic applicator nozzles positioned above a coating station supply coating material to an article. When the coating operation is completed, a suckback cycle is initiated creating a negative pressure inside the nozzles and drawing back into the nozzles any excess material. Where different amounts of coating material may be supplied to different zones on the article, each individual zone of applicator nozzles is independently controlled, both in the flow and suck-back cycles of operation. |
