SU959840A1 - Chamber for applying and drying coating - Google Patents

Description

(54) CAMERA FOR APPLYING AND DRYING COATINGS

The invention relates to painting and drying equipment, c. Particularly to the design of paint-drying chambers, and can be used in paint departments of assembly shops of single and serial production of engineering and repair factories for applying and drying coatings, for dewatering j spatula, sanding, painting with a brush or spray paint and drying parts, components and machines of large size and weight.

A known device for painting large-sized products, comprising a water bath with a sloping bottom, divided by longitudinal walls into channels, floor grids installed above the bathtub to accommodate the products to be processed, and a hydraulic filter connected by a duct with a exhaust fan. The chamber is also equipped with transverse partitions installed in the channels of the bath and forming stepped compartments for cascading water supply in the direction of the hydraulic filter

However, this installation does not solve the problem of painting the bottom of products without turning them, and also is not provided

drying products after painting. In addition, if the dimensions and configuration of the products are changed, the uniform suction of polluted air will not be ensured.

Closest to the invention in technical essence and attainable (the result is a chamber for applying and drying coatings, including a sealed enclosure, in the lower hour ± and which are communicating with the cavity chamber, side cavities with water baths and average along the axis of the chamber, supply system

15 ventilation, exhaust ventilation system with hydraulic filters and hot air supply system 2.

The product to be painted is placed in a chamber on a lattice floor, under which there are hydraulic filters with pallets inclined from the center to the side walls. Over the entire surface of the tray, during the dyeing process, a stream of water is maintained, which forms on their lower

25 edges solid water curtain. Fresh air is introduced into the chamber from above through the filters. The air from the chamber, previously passed through the water curtain, where it is cleaned of particles

30, paint near the floor is released into the atmosphere. In the process of sushi. The air from the chamber is not removed, through special filters under the polo, the chamber is directed to the preheater where its temperature gradually drops to, after which it re-enters the chamber from above. Circulated hot air is maintained until it is completely cured. In the preheater, a thermostat is provided, which ensures that the latter is turned off when the air temperature is up to. The chamber is provided with hermetic doors and maintains a slight overpressure. However, the well-known camera also does not solve the problem of coloring the bottom of products without turning them; moreover, the uniformity of air flow is not ensured when the product configuration changes. With cyusKe, its uniformity is not ensured due to the fact that the flow of hot air does not cover the product, but distracts with side suction. The same circumstance causes a difference in temperature at the top of the chamber and at the bottom. Per numerical disadvantages, besides increasing energy consumption and decreasing productivity, reduce the quality of the coating. The purpose of the invention is to improve the quality of the coatings by uniformly distributing the air flow. This goal is achieved due to the fact that the chamber for applying and drying coatings, including a sealed enclosure, in the lower part of which there are cavities communicating with the cavity, lateral with water baths and averaging along the axis of the chamber, air supply system exhaust ventilation with hydraulic filters and a hot air supply system, equipped with a hot air removal system and rotary valves installed in the side and middle cavities, alternately reporting side cavities when painting with the exhaust system Zhnyu. ventilation, and during drying, with a system for evacuating hot air, and communicating the middle cavity when painting with a fresh air ventilation system, and during drying, with a system for supplying hot air. In FIG. 1 schematically shows the proposed camera; FIG. 2, section A-A in FIG. 1. The chamber includes a sealed housing 1, in the lower part of which air inlets 2-4 are made, communicating with the cavity of the chamber. In this case, the middle cavity 3 is located in the center along the axis of the chamber and has dimensions that ensure the free operation of small pa when painting from below. The air polluted by vapor and paint particles is sucked out of the chamber by ventilation units with hydrofilters 5 through sealing gates 6. The chamber is equipped at the top for 3 (abutment of full air louver 7 with drive and air blowers 8-10). the lower channels with channels 11 for evacuating hot air. The lateral air supplying cavities 2 and 4 are covered with grilles 12 and have inclined water baths in the form of butterfly valves 13 and 14 with thresholds providing a water screen during painting. exhaust air is vented and hot air is directed into exhaust ducts 11. The middle cavity 3 is also blocked from above by grill 15 and has a rotary damper 16. On one side, cavity 3 is connected via a ventilation unit (not shown) to the surrounding atmosphere. fresh air and, on the other hand, is connected to a hot air supply system (not shown). The product to be painted 17 is fixed with the possibility of coloring the bottom and is fed into the chamber by the trolley 18. The chamber is operated as follows. For painting, the product 17 on the trolley 18 is transported into the chamber, the door is closed (not shown), the sealing flaps 6 are raised by the drive, the butterfly valves 13 and 14 are tilted in the direction of communication with the ventilation unit through the hydraulic filters 5, thereby blocking the channels 11, and the rotary damper 16 is installed in the direction of communication with the fresh air channel. The louvers 7 are opened. Then, the suction ventilation units — flooded air and the fresh air supply fan to the middle cavity 3, as well as pumps for supplying water to the hydraulic filters and to the flaps 13 and 14 are turned on. The product 17 on the trolley 18 is painted with small spray gun or, with appropriate equipment, a robot with programmed control, first from the bottom of the middle cavity 3, and then from the sides and from the top. To dry the products, the louvers 7 are closed, the sealing flaps b are lowered, the butterfly valves 13 and 14 are lowered by turning the channels 11 to the side of the hydraulic filters 5, and the flaps 16 turn to the side of the hot air supply channel, closing the fresh air channel. After

Claims (1)

Claim A chamber for applying and drying coatings, including a sealed housing, in the lower part of which there are 15 cavities communicating with the cavity of the chamber, side with water baths and a middle along the axis of the chamber, the ventilation system, the exhaust ventilation system with hydraulic filters jq mi and the feed system hot air, characterized in that, with the aim of improving the quality of coatings due to the uniform distribution of air flows, the chamber is equipped with a hot air exhaust system and rotary mounted in the side and middle cavities dampers alternately communicating the side cavities during painting with the exhaust ventilation system, and during drying with the hot air exhaust system, and communicating the middle cavity during painting with the forced ventilation system, and during drying with the hot air supply system.