RU36268U1 - Device for applying coatings of powder polymer material to products - Google Patents

Description

Device for applying powder coatings to products

polymer material

The utility model relates to devices for applying a coating of powder polymer materials in an electrostatic field.

Known devices for applying powder paints, containing; an aggregate for coating, a spray booth with a device for recovering excess powder, having openings communicating with the interior of the chamber, or a suction unit. The chamber floor has one or more inclined parts, under the floor there are channels for collecting unsettled powder or bottom holes. For periodic cleaning of the chamber, an air inlet device is used, which generates jets across the inner surface of the chamber, or cleaning devices moving vertically in the inner cavity of the chamber. For cleaning air emissions and trapping unsettled powder, the chamber is equipped with an exhaust system (or cyclones), in front of which a perforated screen is fixed, and the screen section located in the upper part of the chamber is equipped with a fabric filter (application EPO 1138394, IPC B 05 V 15/12; application Germany 19738097, IPC B 05 D 1/02; A.S. USSR 1754223, IPC B 05 V 15/12).

A disadvantage of such devices is the insufficient efficiency of collecting and returning to the process of unsettled powder, as well as the insufficient efficiency of air purification due to rapid clogging of the filter, which requires the use of additional devices for cleaning filters.

Closest to the claimed is a device for applying powdered material in an electrostatic field, containing a coating chamber, a filter installed between the chamber and

2003132954

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IPC 05 to 15/12

the space in communication with the suction device, and divided into honeycomb sections, the openings of which are closed by filtering elements on the camera side, and a filter cleaning unit (Pat. RF 2072902, IPC B 05 V 15/12). Excess powder material that does not settle on the product and is in the chamber in suspension, is sucked out by an exhaust fan through the filter compartment and the channel system. Air contaminated with powder passes through the filter, and then through the filter cartridges for additional cleaning, the powder trapped by the filter but not settled on it, as well as the powder removed from the filter during its cleaning, is poured into the hopper and goes on for regeneration.

However, the degree of trapping of the unsettled powder and the quality of cleaning the contaminated bounce are not effective enough, since in addition to filters, the filter cleaning unit, additional cleaning elements are required to clean the chamber, and particles of powdery material can be removed when cleaning the filters with a compressed air jet.

The technical problem of the proposed solution is to increase the cleaning efficiency of the device, especially when changing the color of the powder material, designed to more fully capture the settled powder and purify the air in the working area, as well as to accelerate the recovery of the device.

The problem is achieved in that in a device containing a chamber for applying a polymer powder material, a high voltage source, a filter, a suction device, a perforated screen connected to a high voltage source is installed in front of the exhaust system filter. Moreover, the inner surface of the chamber is formed by one wall, rigidly connected to the floor, behind which a filtration unit is installed, containing an inertial filter, a fine filter and an exhaust fan.

This embodiment of the device allows applying powder polymer coatings to large-sized products, completely trapping and returning powder that has not settled on the product to the cycle, qualitatively cleaning the air from the powder in the working area, and also quickly cleaning the device when changing the color of the powder material.

The device is illustrated by drawings, where in FIG. 1 shows a sectional view of a chamber for applying polymer powder materials; FIG. 2 is a front view camera; FIG. 3 shows an insulator 8 for attaching a perforated screen to the camera body. A device for applying a polymer powder material contains a coating chamber formed by rigidly connected wall 1 and floor 2. A suction device containing an exhaust fan 3, an inertial filter 4, and a fine filter 5 connected to the hopper 6. A perforated screen 7 is located in front of the suction unit made in the form of a metal grid, mounted on the wall 1 with the help of insulators 8, 9, with the possibility of easy removal, moreover, one of the insulators 8 has a spring-loaded sleeve 10, fixed ha Coy in the insulator 11 connected to the high voltage source 12 a high voltage cable 13 which provides good contact with the screen reinstallation.

The device operates as follows. Under the painted part fixed on the transport system, the device is rolled up and the power of the coating chamber is turned on. When you turn on the spray gun (not shown) for applying powder polymer material, an electrostatic field arises, under which the powder supplied to the part, being charged, settles on it, and the part passing by using the exhaust fan 3 is sent to the suction unit. Moreover, in front of the inertial filter 4, a metal mesh is installed, on which a high voltage with a charge opposite to the charge is applied during the application of the powder

powder, as a result of which the powder that has not settled on the part is attracted to the grid and settles on it. To remove the powder from the grid, at the end of the coating process, a charge of the same name is applied to it with the charge of the powder, and the powder is shaken off the grid.

To capture a powder with a larger particle size, a charge of the same name as the powder charge is applied to the grid during the deposition process, in this embodiment, the powder is repelled from the grid with its return; it is dropped onto the part or dropped out for further recovery. The powder-air mixture passing through the metal mesh enters the inertial filter 4 and the fine filter 5 and the air purified from the powder, sucked off by the exhaust fan, is returned to the surrounding atmosphere, and the powder collected by the filter 4 is collected in the hopper.

The advantages of the claimed device over the well-known is that its design (wall-floor) allows you to paint any large-sized details (there is no limitation on the size of the coating chamber); Allows in the process of applying the powder material to effectively capture the settled powder, to easily and quickly clean the device of the powder, without resorting to additional cleaning devices.

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Claims (1)

A device for applying powdered polymer material in an electrostatic field, comprising a coating chamber, a filter installed between the chamber and the space in communication with the suction device, characterized in that it further comprises a perforated screen connected to the high voltage source, installed with a gap relative to the exhaust filter system.