Device for neutralizing static electricity

Abstract

The invention relates to a static neutralization device which can solve the problem that the coating of the edge of a plate is thicker than the coatings of other positions during static powder spray coating. The static neutrodyne system comprises an insulator arranged at the back of a coated plate, a plurality of spray points arranged on the insulator with even spacings towards the coated plate, a voltage generator used for generating voltage opposite to the voltage of a static ejection gun and a power cord used for connecting the spray points and the voltage generator. Because each spray point connected with the voltage generator through the power cord has charges with polarities opposite to the polarities of of the static ejection gun, an electric field median surface is generated on the flat surface of the coated plate. In addition, an electrified dusty spray sprayed from the static ejection gun has charges with polarities same as polarities of the static ejection gun and can be neutralized when getting across the flat surface of the coated plate from the static ejection gun to become uncharged powder, thereby the powder can naturally fall off and can not be attached to the edge of the coated plate or the back of the coated plate.

Description

technical field [0001] The invention relates to an electrostatic neutralization device, in particular to a method for eliminating the problem that the coating thickness at the edge position of MDF (medium fiberboard) or other boards is thicker than that at other positions during the production process of electrostatic powder spraying (commonly known as "window frame" effect). Thus, the present invention is a means of eliminating the "window frame" effect. Background technique [0002] When MDF (medium fiberboard) or other boards are sprayed with electrostatic powder, the powder on the discharge port of the spray gun is sprayed out, and is directly electrostatically charged at the front of the gun nozzle, and these charging electrodes are connected to (0 ~ 140) KV voltage within the range. [0003] Such as figure 1 As shown, the MDF sheet to be sprayed is usually grounded, and the powder particles to be sprayed move along the electric force lines generated by the potential...

AI Technical Summary

Problems solved by technology

However, this method also has the following disadvantages: the excess powder from the overspray will increasingly deposit on the sheet metal parts, so it must be cleaned frequently

As the thickness of the deposited powder changes, the ability of the metal plate to absorb charged powder is also reduced, thereby affecting the stability of the coating thickness of the product

The main problem with this method is that the powder-coated sheet metal itself is more difficult to clean quickly

Images