An electrostatic powder multifunctional spraying device

Abstract

The invention relates to the technical field of spraying equipment, and discloses an electrostatic powder multifunctional spraying device, which includes a nozzle cavity, a pressurized swirl cavity and an electrostatic discharge cavity are arranged inside the spray head cavity, and the pressurized swirl cavity is connected with the static electricity through a flow guide channel. The ejection chamber is connected, and the pressurized whirling chamber is provided with a spiral diversion mechanism for guiding the powder into the diversion channel in a spiral manner. The diversion channel is equipped with a reverse flow suppression mechanism, and the inner wall of the electrostatic ejection chamber is suspended by the basin bracket tube. There is a discharge basin, the opening of the discharge basin faces the tail and is facing the front opening of the deflector, and the discharge needle is located at the axis of the discharge basin; the invention allows the powder to flow in a spiral manner by changing the flow direction of the powder in the nozzle cavity. Through the discharge needle, a new structure of the discharge basin is added at the same time to ensure that there is no dead angle adhesion, to achieve uniform adhesion and charge of the powder, and the thickness of the sprayed layer is more uniform, and the internal flow direction of the powder and the quiet link are optimized to ensure the durability of the nozzle. and environmental adaptability.

Description

Technical field [0001] The present invention relates generally to a static electric spray head, specifically an electrostatic powder multifunctional injection device. Background technique [0002] The working principle of the electrostatic powder spraying method is almost identical to the electrostatic spraying method of the general liquid coating, and the difference is that the powder spray is dispersed instead of atomization. It is a coating that is sprayed by an electrostatic powder gun, while dispersing the powder particles with negative charge, the charged powder particles are attached to the grounded coating of the active force of the gas stream (or attemile) and the electrostatic gravity. On the material, the melt is then fusible into a film. Electrostatic powder spraying method is a powder coating method that occupies the dominant position in the field of industrial coating. [0003] Among them, the electrostatic powder gun relies on the internal discharge to attach a neg...

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Problems solved by technology

[0003] Among them, the electrostatic powder spray gun relies on the internal discharge to attach negative charges to the passing powder. When the powder throughput is large, many powders cannot attach negative charges in a timely and uniform manner. The obvious difference in powder charge will lead to electrostatic adsorption effects, which will eventually be displayed on the sprayed surface. The problem above is that the thickness is not uniform. Therefore, for this kind of problem, we need a spray that can ensure that when the large-flow powder passes through the electrostatic powder spray gun, it can evenly and effectively attach negative charges, so as to ensure the uniformity of the sprayed surface. device

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