PROCESS AND APPARATUS FOR COATING THE SURFACES OF CONTAINERS WITH COATING MATERIAL

摘要

A series of containers (13) to be coated with a liquid plastics material which subsequently hardens are moved by a chain conveyor (2) and are at the same time rotated in holders (1) on the conveyor by gear wheels (5) driven by a chain (6). The containers pass first through a priming zone (20) and are then moved in succession vertically downwards by a vertical length of the conveyor. The uppermost container in the downward vertical path is sprayed with the plastics material from a bank of nozzles (10). The containers are then moved through a drying zone (15) and a cooling zone (16). It has been found that by coating the containers while they are being moved vertically downwards and are being rotated, a very uniform coating can be obtained and also the supply of liquid coating material to the nozzles (10) can be continuous without any of the material missing the containers and being wasted.