SU1502125A1 - Gun-mixer for spraying high-reactive compositions - Google Patents

Abstract

The invention relates to the production of polymeric materials and can be used in the manufacture of polymer products by mixing the active components, in particular, during spraying and pouring polyurethane foams. The aim of the invention is to increase reliability. For this, the conical closure plug is connected by its side surface with the bottom of the mixing chamber. Such a plug installation eliminates stagnant zones in the component supply channels and thus the need for frequent cleaning of the mixing chamber. 6 Il.

Description

The invention relates to the field of the production of polymeric materials and can be used in the manufacture of polymer products by displacing the active components, in particular during spraying and pouring polyurethane foams.

The aim of the invention is to increase reliability.

FIG. 1 shows a pistol-mixer, general view, cut; in fig. 2 shows section A-A in FIG. one; in fig. 3 is a view B in FIG. one; in fig. 4-6 - node I in FIG. 3, the position of the stop cap when turning it at a certain angle.

The mixing gun includes a housing 1 with a mixing chamber 2 and channels 3 and 4 for draining components. The outlet openings of channels 3 and 4 are diametrically opposed on the periphery of the bottom of the mixing chamber 2. The casing has a channel 5 and a distributing system of the channels 6 for supplying compressed air. The channels 6 are made tangentially to the mixing chamber 2, and their outlet openings are diametrically opposed to the side walls of the chamber 2 and are adjacent to the outlet openings of the channels 3 and 4 for introducing the components.

In the housing 1 at an angle to the axis of the mixing chamber 2 a conical closure plug 7 is installed, the lateral surface of which is adjacent to the bottom of the mixing chamber 2. The plug is pivotably mounted with the aid of knob 8. Channels 3 and 4 pass through tube 7 and enter chamber 2. Channel 5 passes through tube 7 to the intersection with grooves 9, one of which is stepped. One of the channels 6 of the diverting system passes through the stepped groove 9 of the plug 7 and intersects with the channel 5 for supplying air.

A nozzle 10 with a replaceable nozzle 11 is installed in the housing 1. To prevent ejection during operation, the nozzle 10 is fixed with a nut 12. A hollow handle 13 is attached to the body 1 of the pistol.

Gun-mixer works as follows.

In the initial position, the plug 7 is in the closed position (Fig. 6). At the same time, the supply of components and air to the mixing chamber 2 is shut off. Then using the handle 8, the plug 7 is turned 75-80 ° to the left to the “Open” position (Fig. 4). In this case, the liquid components C and D are pumped through channels 3 and 4 into the mixing chamber 2 with simultaneous supply of compressed air through channel 5 and channels of the diverting system 6.

When entering the mixing chamber 2, the jets of the components collide and

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spirit and the formation of an air-liquid mixture moving in a spiral to the center of the chamber and entering the nozzle 10. The resulting mixture is sprayed after it leaves the nozzle 11 due to a sharp expansion of the air.

After the spraying is completed, the handle 8 rotates the plug 7 by 35-40 ° to the right (Fig. 5) or to the left in the "Purging. In this position, the plug 7 blocks the channels 3 and 4. Thus, the supply of components is turned off and the system is flushed with air. The result is a cleaning of the mixing chamber 2 and the nozzle 10 from the remnants of the mixture. After 3-5 seconds, the plug 7 is turned to the “Closed” position (FIG. 6).

The installation of a conical plug in the gun-blender with the matching of its side surface with the bottom of the displacement chamber allows the suit to "stagnant zones in the supply channels of the components and, therefore, the need for frequent cleaning of the mixing chamber,

which increases the reliability of the device.

Claims (1)

Invention Formula A mixing gun for spraying highly reactive compositions, comprising a housing with a mixing chamber and channels for introducing components whose outlet openings are diametrically opposite on the periphery of the bottom of the displacement chamber, with tangential channels for introducing compressed air having outlet openings diametrically opposite to in the side walls of the displacement chamber and adjacent to the outlet openings of the channels for the introduction of components, a shut-off conical plug with openings, stepped grooves and a canal scrap for air supply located between the channels for introducing components, characterized in that, in order to increase reliability, the conical plug is connected with its side surface with the bottom of the mixing chamber. according to er well then h 7 po8er s. Fiel 7 7 Fig.: 3 noSepnt mo 7s (rig 5 Fie.6