A coating machine (also known as a spreading machine) is a mechanical device used to apply an adhesive slurry to the surface of textiles. The primary types include:
(1) Horizontal or double-acting coating machines: The textile passes through a narrow gap between a coating blade and a working roller to receive a thin film coating, after which it traverses a steam-heated platform to allow the solvent to evaporate, leaving behind the adhesive layer;
(2) Drum-type coating machines: These utilize a hollow, steam-heated metal drum to replace the conventional drying platform;
(3) Vertical or inclined dipping machines: After the textile is immersed in the adhesive slurry, excess material is scraped off the surface by a coating blade and a squeeze roller; it then passes through a vertical or inclined drying platform to facilitate solvent evaporation and form the adhesive layer;
(4) Desktop coating machines: These devices utilize pneumatic pressure to spray adhesives, paints, or other coating materials onto a substrate. The equipment features three-axis linkage and automated operation, incorporating computer programming to control the precise spray path. Both the coating thickness and application duration are fully adjustable, making the system simple and easy to operate.
Coating machines represent an application where machinery replaces manual labor; within the industry, they are also commonly referred to as automatic spraying machines, automatic adhesive applicators, or glue spraying machines.