SU959899A2 - Injection nozzle for applying coating on inner surface of casting moulds - Google Patents

Description

(54) JET FOR DRAWING COATING ON THE INTERNAL SURFACE OF CASTING FORMS

one

The invention relates to a foundry industry, namely, equipment for coating a coating on the internal surfaces of casting molds, for example, chill molds before metal casting.

According to the main author. St. No. 835608 is a well-known nozzle for coating the internal surface of casting molds, located in the cylindrical housing of a hurbinka, with a plastic disc, a paint chamber and compressed air supply channels and paint on the end of the shaft. The cylindrical body of the Force-T1ki is equipped with a nozzle connected to the body with a threaded connection, the shaft of the turbine is vtolien with a cone-shaped section forming an annular gap with the nozzle, and the paint chamber is shaped as a cylindrical container, which is concentrated relative to the shaft on the body of the Body Undefined device. controlling the compressed air supply, i.e. with low air pressure

the paint does not spray, and with a high air pressure, a pressure is created at the nozzle exit (pressure difference between the inlet and the outlet of compressed air), which impedes the rotation of the impeller.

The aim of the invention is to simplify the regulation of the compressed air supply by reducing: the influence of the pressure differential between the inlet R of the compressed air outlet on the operation of the impeller.

ten

This goal is achieved by the fact that the nozzle for coating the inner surface of the casting molds is equipped with a diaphragm installed in its internal cavity, and a sealing ring that interacts with it mounted on the shaft of the binder.

FIG. 1 shows a general view of the proposed nozzle section; in fig. 2 - section

20A-A in FIG. one; FIG. 3 -. section bb in fig. one; in fig. 4 shows a section B-B in FIG. one.

Claims (1)

The spray nozzle for coating the inner surface of the casting molds (molds) 39 consists of a housing I, in a bearing assembly 2 of which the shaft 3 of the impeller 4 is fixed, having a tapered section 5 and a spray disc -6 .. A nozzle is attached to the housing 1 using threads 7 8 forming an annular gap 9 with a cone-shaped section 5. A paint chamber 11 is attached to the nozzle 8 by means of thread 10, which is filled into a cylindrical tank with a conical bottom forming an adjustable gap 12 with the nozzle 8 and an annular slot 13 with a shaft 3 inner floor The bores of the nozzle 6 are fitted with a diaphragm 14 secured therein by means of a spacer washer 15, and a sealing ring 16 made of fluoroplastic mounted on a shaft for separating the compressed air into two independent streams. To stop the connections of the nozzle 8 with the core 1 and the container. And the lock nut serves. In the housing 1, the channels 18 are provided for supplying compressed air to the impeller 4, the paint repair channels 19 and the paint supply channels 20. The nozzle works as follows. The channels 18 are supplied with compressed air, which causes the rotation of the gurbikku 4, with which the spray vane 6 rotates. At the same time, the air is compressed and through the channels 19, which mixes with the paint coming under pressure from the tank 11, in the adjustable gap 12. The mixture is then passed through an annular slot 13 and falls onto the dike 6, from which the paint is applied to the internal surface of the mold by the action of centrifugal particles. When changing the brand and composition of the paint, as well as the size of the casting molds, in order to obtain a uniform and high-quality coating, the annular air supply gap 9 or the adjustable ink supply gap 12 can be changed by moving the thread 7 of the nozzle 8 relative to the cone-shaped part 5 paint on the nozzle 8. Thus, the compressed air supply. to rotate the turbnink 4 and spray paint is carried out through two independent channels 18 and 19, which eliminates the influence of the pressure difference between the air inlet to the channels 19 and the output through the adjustable gap 12 on the operation of the impeller 4, and simplify the process of regulating the flow of air and paint . The invention The injector for applying to the inner surface of the mold according to the ed. St. N 835608, characterized in that, in order to simplify the regulation of the compressed air supply by reducing the differential pressure between the inlet and the outlet of the compressed air for the operation of the tour amp, the nozzle of the nozzle is fitted with a diaphragm installed in its internal cavity and interacting with the sealing ring established on a shaft turbnushn. Sources of information, P1 ntye into account during the examination 1. USSR Copyright Certificate № 835608, cl. B 22 C 23/02, 1979. ig.1 one W Fig.Z BB