Coating machine for ultrathin membrane coating

Abstract

The invention discloses a coating machine for ultrathin membrane coating. The coating machine for ultrathin membrane coating comprises a rack, a first unwinding roller for releasing a coating base material, and a first winding roller for recovering the coating base material, wherein the first unwinding roller and the first winding roller are fixed onto the rack. The coating machine for ultrathin membrane coating further comprises a lining membrane, a vacuum absorption roller, a spraying mechanism and a drying mechanism, wherein the vacuum absorption roller, the spraying mechanism and the drying mechanism are arranged on the rack; the vacuum absorption roller is arranged between the first unwinding roller and the first winding roller; the lining membrane covers the vacuum absorption roller;the side, deviated from the vacuum absorption roller, of the lining membrane fits to the reverse side of the coating base material; the feed end, close to the vacuum absorption roller, of the spraying mechanism is arranged on the front surface of the coating base material; and the drying mechanism is arranged close to the vacuum absorption roller. The lining membrane is arranged between the vacuum absorption roller and the coating base material, so that the coating base material is prevented from shrinking and rolling or stretching and deforming on the vacuum absorption roller, the coating thickness on the coating base material is uniform, the drying efficiency and the spraying efficiency on the flat coating base material are high, and the coating machine for ultrathin membrane coating iseasy to realize automatic production.

Description

technical field [0001] The invention relates to the technical field of processing equipment, in particular to a coating machine for ultra-thin film coating. Background technique [0002] The manufacturing process of the membrane electrode of the hydrogen fuel cell includes the key process of uniformly coating the liquid slurry on an ultra-thin and easily deformable membrane, and heating and drying through an oven. The conventional coating method is to directly spray the slurry on the film, and then pull it into the oven for drying through the roller, but the film is prone to shrinkage, curling or stretching deformation when encountering solvents during this process, shrinkage curling or stretching deformation Both will make the drying time longer, so the drying efficiency is relatively low. [0003] In order to solve the above problems, processors often cut the film into a single piece, adsorb it on a platform, and spray it on a single piece of plane. However, this method ...

AI Technical Summary

Problems solved by technology

However, this method needs to cut the film into single pieces first, and then coat each piece one by one, and the uniformity of coating thickness is affected by the precision of the platform, so it is difficult to realize automatic continuous production and is not suitable for mass production.

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