Multifunctional electrostatic powder spraying device

Abstract

The invention relates to the technical field of spraying equipment, and discloses a multifunctional electrostatic powder spraying device which comprises a spraying head cavity, a pressurization convolution cavity and an electrostatic spraying cavity are formed in the spraying head cavity, and the pressurization convolution cavity communicates with the electrostatic spraying cavity through a flow guide channel. A spiral flow guide mechanism used for guiding powder into the flow guide channel in a spiral mode is arranged in the pressurization convolution cavity, a backflow restraining mechanism is arranged in the flow guide channel, a discharge basin is arranged on the inner wall of the electrostatic spraying cavity in a suspended mode through a basin support pipe, an opening of the discharge basin faces the tail and is right opposite to a front opening of a flow guide plate, and a discharge needle is located at the axis position of the discharge basin. By changing the flowing direction of powder in the spraying head cavity, enabling the powder to pass through the discharge needle in a spiral surrounding mode and additionally arranging a novel structure of the discharge basin, dead-corner-free attachment is guaranteed, uniform charge attachment of the powder is achieved, the thickness of a spraying layer is more uniform and consistent, the internal flowing direction of the powder and the mute link are optimized, and the durability and the environmental adaptability of the spraying head are ensured.

Description

technical field [0001] The invention specifically relates to an electrostatic spray head, in particular to an electrostatic powder multifunctional spray device. Background technique [0002] The working principle of the electrostatic powder spraying method is almost the same as that of the general liquid paint electrostatic spraying method, the difference is that the powder spraying is dispersed rather than atomized. It is a coating sprayed by an electrostatic powder spray gun. While dispersing, the powder particles are negatively charged. The charged powder particles are subjected to the action of airflow (or other forces such as centrifugal force) and electrostatic attraction, and are applied to the grounded surface. On the object, it is heated to melt and solidify to form a film. Electrostatic powder spraying method is the dominant powder coating method in the field of industrial coating. [0003] Among them, the electrostatic powder spray gun relies on the internal dis...

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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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