In the late 1960s and early 1970s, the development and commercialization of sprinklers was achieved. The sprinklers fully saturate the waxes of the grooved and printed corrugated box blanks. As shown in Figure 179, the apparatus transports individual carton blanks (each blank is vertically aligned and separated from each other by a rack system) through a wax overflow formed by a weir or nozzle. Spray point. Excess molten wax from the top and leached sections is concentrated at the bottom of the unit and recycled. The entire system is closed in such a way that the incoming cardboard can be preheated with warm air, the billet is hot leached after waxing, and then the production of each line is cooled by cold air before packaging and ready for shipment. The system is slightly less.
The amount of wax absorbed is also 40% - 50% of the weight of the original board. However, the new type of sprinkler allows the operator to obtain more adjustment control than the impregnator, and if desired, he can control the lower limit of the amount of wax used, as well as the flexibility to produce dry waxed or wet waxed articles. There was no statistically significant difference in the water resistance of the waxed carton between the products prepared by the dipping method or the spray method with the same amount of wax absorbed. The shower creates a better and more uniform surface. The individual cooling of the blank eliminates the stickiness of the adjacent blank.
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