| 摘要 |
A coating hood adapted to uniformly apply protective coatings to the exterior of hot glass containers is disclosed. The hood comprises a tunnel for allowing the containers to pass therethrough, and an adjustable top for accommodating containers of various sizes. At least two jet slots are located in each side wall, and at least two receiver slots in the opposite side wall are aligned therewith. The jet slots and the suction slots are interspersed opposite to each other in each side wall. The coating compound is introduced through at least one feedpoint, and blowers secured to the side walls furnish high velocity air containing the coating compound. Baffles are situated in the flow path of the high velocity air so that the jets issuing from the jet slots are well defined. Two or more closed recirculating loops are defined by the judicious selection of blowers, jet slots and receivers. The coating compound is fed into the innermost loop, and the eddy currents created between adjacent loops by the closely spaced, oppositely directed jets transfer the coating compound to the outermost loop. In such manner, the outer loop will have a lower coating compound concentration and consequently, a lower loss of coating compound to the exhaust than would occur with conventional coating hoods. Such losses may be further reduced by having the outer loop function as an air curtain over the full height of the coating hood, thus limiting the amount of ambient air entering the hood. |
