Roller coater and coating method

Abstract

The invention discloses a roller coater and a coating method, which relate to the technical field of color-coated steel sheet production. The roller coater is characterized by comprising a base, a metering roller, a lifting roller and a coating roller which are serially connected and abutted against one another and are in rolling connection are mounted on the base in a horizontal rotary way, the metering roller is arranged higher than the lifting roller, and the connecting line between the axes of the metering roller and the lifting roller are arranged to form an acute angle with the horizontal plane; a storage and buffer mechanism is arranged above the metering roller, the storage and buffer mechanism comprises a inner hollow storage box and a paint inlet pipe, one end of the paint inletpipe extends into the storage box, the other end of the paint inlet pipe is connected to an external paint source, and the bottom or the lower part of the sidewall of the storage box is provided witha discharge outlet; and paint which flows out of the discharge outlet can fall onto the metering roller. The roller coater solves the problem that the defects of flooding and dark lines can easily appear when the traditional coating process uses the strip of the reel to produce aluminium powder color-coated steel sheets in batches, effectively reducing the defects of flooding and dark lines of aluminium powder products and improving product quality.

Description

technical field [0001] The invention relates to the technical field of color-coated steel plate production, more specifically, it relates to a roller coating device and a coating method. Background technique [0002] The color-coated steel plate is made of cold-rolled steel plate and galvanized steel plate as the substrate, after surface pretreatment (degreasing, cleaning, chemical conversion treatment), coating in a continuous method (roller coating method), baking and cooling. finished product. The color-coated steel plate has light weight, beautiful appearance and good anti-corrosion performance, and can be processed directly. [0003] The prior art refers to the Chinese utility model patent with the authorized announcement number CN 205341200U, which discloses a solvent-recyclable color-coated steel production line, including an uncoiler, a sewing machine, an uncoiler, a degreasing passivation machine, and a primer coater. , primer drying channel, first condenser, firs...

AI Technical Summary

Problems solved by technology

The utility model recycles and reuses the diluent by setting a condenser above the primer and topcoat channels of the color-coated steel plate production line, avoiding the direct emptying of the diluent and causing environmental pollution, but has the following disadvantages: in the production of aluminum powder or pearls For powder coating products, due to the low density of powdered pigments added to the coatings and poor compatibility with resins, when the coating is in poor fluidity, the pigments tend to rise and cause floating colors, which are brought in with the pick-up roller, and It is coated on the base material by a coating machine, and after baking, it will produce floating color-like dark lines and cause bad losses

The utility model has a small number of rollers, and the coating roller is covered with a rubber sleeve, so that defects can be reduced and the product quality can be improved when the aluminum plate is painted, but the following disadvantages exist: when producing aluminum powder or pearl powder coating products, Due to the low density of powdered pigments added to the paint and poor compatibility with the resin, when the paint is in poor fluidity, the pigments in the paint pan tend to rise and cause floating colors, which are brought in with the paint roller and are then painted. Roller coating on the base material, after baking, it will produce floating color and dark lines, which will cause bad loss

This application for the invention strengthens the pretreatment of the steel strip and further improves the adhesion of the paint film, but it has the following disadvantages: when producing aluminum powder or pearl powder coating products, the density of the powdered pigment added to the coating is small, and The compatibility with the resin is poor. When the fluidity of the paint is poor, the pigment in the paint tray is easy to rise and produce floating color. The floating color is brought in with the paint roller and coated on the substrate by the coating roller. Floating color-like dark lines after roasting cause bad loss

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