RU197704U1 - Polyurethane foam spray nozzle - Google Patents

Abstract

The inventive utility model relates to spraying devices used in conjunction with mounting spray guns to spray and / or spray aerosol substances under pressure. A spray nozzle for polyurethane foam, including a cylindrical body, provided with a base from the first end with a base hole extending inside the said cylindrical body, forming a cavity in it to accommodate the barrel of the gun attached to the container containing the aerosol composition, the second end of the body is convex and in it a V-shaped recess is formed in which a through hole is made, communicating with the internal cavity of the housing, characterized in that the housing with the base is made of elastomeric material with a percent elongation to break of 400% to 700% with a Shore A hardness range of 40 to 80 conv.ed The technical result of the proposed technical solution is to increase the elasticity of the nozzle and expand the scope of each nozzle by ensuring the versatility of its attachment to the barrel of an assembly gun of any size.

Description

The inventive utility model relates to spraying devices used in conjunction with mounting spray guns in the form of a jet and / or spray of aerosol substances under pressure.

Aerosol spray guns are available on the market, including mounting foam, the tip diameter of which varies from 5.2 mm to 7.0 mm.

The prior art device for spraying a medium under pressure according to the patent of the Russian Federation No. 2623276 (IPC B05B 1/00, priority date: 03/06/2015, publication date: 06/23/2017), including a cylindrical body equipped with a base with a landing hole at the first end, extending into the aforementioned cylindrical body, forming a cavity in it for accommodating a gun barrel, attached to a container containing an aerosol composition, the base being made in the form of petals protruding beyond the body dimensions that are opposite in size in order to provide finger rest the user's hands to place the pistol barrel inside the nozzle cavity, a cylindrical elevation is made at the second end of the housing, and a through hole made in it is communicated with a V-shaped recess through the sides, which are not closed on the sides, and the width of which increases to the side spray outlet medium, to the lateral surfaces of the cylindrical elevation adjacent plate protrusions located opposite each other, the height of which exceeds the height of the cylindrical elevation, and on their lateral outer sides there are cuts made to the second end of the cylindrical body, while the wall of the said end has a thickness that ensures excess length a through hole made in a cylindrical elevation above the height of the latter, the end face of the landing hole adjacent to the base is made with a ring cut, and the base petals are made with a non-slip surface, in addition, the spray nozzle is equipped with its mount when it is not in use.

A disadvantage of the known device is the low elasticity of the nozzle and the narrow scope of each nozzle, due to the need to manufacture nozzles with different diameters of the mounting hole for tight fixation on different-sized gun barrels.

The technical result of the proposed technical solution is to increase the elasticity of the nozzle and expand the scope of each nozzle by ensuring the versatility of its attachment to the barrel of an assembly gun of any size.

The technical result is achieved due to the fact that the spray nozzle for polyurethane foam includes a cylindrical body equipped with a base from the first end with a landing hole extending inside the said cylindrical body, forming a cavity in it to accommodate the gun barrel attached to the container containing the aerosol composition, the second the end face of the body is convex and a V-shaped recess is formed in it, in which a through hole is made, communicating with the internal cavity of the body, while the body and base are made of elastomeric material with a percentage elongation to break of 400% to 700% with a Shore hardness range And from 40 to 80 conventional units

Thus, due to the presence of an elastic body and the base of the nozzle, the range of guns for which the claimed nozzle is suitable is expanded. Moreover, it is due to the claimed range of elongation of elastic material (from 400% to 700%) that this nozzle can be used on mounting guns with a known range of tip diameters, while the nozzle is tightly held on the guns for mounting foam, including when used. When using the claimed nozzle eliminates the need to select a gun with well-defined parameters of the tip, as a result of the claimed technical solution allows the use of one nozzle along with a wide range of mounting guns on the market.

If the percentage elongation of the elastomeric material is less than 400%, then such a nozzle is less universal, because it is impossible to ensure a tight installation of the nozzle on the tip of the mounting gun with a maximum diameter (6-7 mm) due to insufficient elasticity of the material. Moreover, if the percentage elongation of the elastomeric material is more than 700%, then such a nozzle will not provide strong engagement on the tip of the gun with a minimum diameter (5.2 mm), and as a result of operation, such a nozzle can be easily removed by a jet under pressure. As a result, the nozzle has the most versatility, at least the base with the bore hole of which is made of elastomeric material with a percentage elongation to break of 400% to 700% with a Shore A hardness range of 40 to 80 conventional units.

Optimum performance ranges from 40 to 80 srvc. units The softer the material (more than 40 conventional units), the better it is mounted on pistols with a large tip diameter, adhering to the tip of the gun, however, excessively soft samples can be pulled off by guns with small tip diameters. It is not possible to mount harder samples (more than 80 conventional units) on a gun with a large tip diameter.

The spray nozzle for polyurethane foam may contain a fastener in its non-operational position.

The claimed technical solution is illustrated by the drawings:

FIG. 1 is a general view of a spray nozzle for polyurethane foam;

FIG. 2 is a top view of a spray nozzle for polyurethane foam;

FIG. 3 is a section A-A of a spray nozzle for polyurethane foam.

The spray nozzle (Fig. 1,2) for polyurethane foam includes a cylindrical body 1 provided with a base 2 from the first end with a landing hole 3 extending inside the aforementioned cylindrical body 1, forming a cavity in it for accommodating the gun barrel (not shown), attached to the container (not shown in the drawing) containing the aerosol composition, and the base 2 is made in the form of petals protruding oppositely behind the dimensions of the housing 1, the petals of which are sized enough to provide the fingers of the user’s fingers to accommodate the gun barrel ( not shown) inside the nozzle cavity. The base 2 can be made with a non-slip surface for a more reliable grip with fingers of its petals.

The second end of the housing 1 is convex and a V-shaped recess 4 is formed in it, in which a through hole 5 is made, communicating with the internal cavity of the housing 1, while the housing 1 with the base 2 is made of elastomeric material with a percentage elongation to break of 400% to 700% with a shore hardness range A from 40 to 80 conventional units

During the development process, prototypes were made from various commercially available materials. In the process of testing, it became clear that the key indicators in the selection of steel are Shore A hardness and percentage elongation to break. The hardness range indicated above allows not only to mount the nozzle on the mounting gun, but also to hold firmly on the tip of the gun during operation. The percentage elongation range allows the use of the product on all tested brands of mounting guns, without destroying the latter.

The spray nozzle for polyurethane foam may contain a means of attaching 6 to the gun when it is not in use.

As an elastomeric material, an elastomeric material based on toluene diisocyanate (TDI) can be used [https://docplayer.ru/39406849-Izocianatnye-tdi-predpolimery-elast-ilitevye-poliuretanovye-elastomery-na-ih-osnove.html], Vytaflex 60 [https: // www.

smooth-on.com/products/vytaflex-60/], another thermoplastic, rubber.

In this case, for example, the percentage elongation of the TDI-based elastomeric material before rupture is 400% -700%, and the force required for rupture is approximately 4-7 MPa. Tensile strength (tensile strength) is the mechanical stress above which the destruction of the material occurs, i.e. this is a threshold value, exceeding which mechanical stress will destroy the product of elastic material.

When using a nozzle, a material with the declared properties makes it possible to use a nozzle with a much smaller diameter of the bore with a gun having a tip with a significantly larger diameter. This elastomeric material allows the nozzle to be tightly fixed on the tip of the gun and does not allow to fly off when spraying polyurethane foam.

An assessment of mounting pistols known in commercial networks has shown that the minimum diameter of the tip of the gun is 5.2 mm (minØ) and the maximum diameter is 7.0 mm (maxØ). With a well-known line of mounting guns, research was conducted on the selection of suitable material for the base of the nozzle. The research results are presented in the table.

As a result, for the manufacture of a universal spray nozzle applicable with various tip diameters, the most universal is an elastomeric material in which the percentage elongation to break is 400-700% with a Shore A hardness range of 40 to 80 conventional units, and the tensile force 4-7MPa.

Claims (3)

1. A spray nozzle for polyurethane foam, comprising a cylindrical body, provided with a base from the first end with a base hole extending inside the said cylindrical body, forming a cavity in it to accommodate the gun barrel attached to the container containing the aerosol composition, the second end of the body is convex and a V-shaped recess is formed in it, in which a through hole is made, communicating with the internal cavity of the housing, characterized in that the housing with the base is made of an elastomeric material based on toluene diisocyanate with a percentage elongation to break of 400% to 700% with a Shore hardness range And from 40 to 80 conventional units 2. The spray nozzle for polyurethane foam according to claim 1, characterized in that the base is made with an anti-slip surface. 3. The spray nozzle for polyurethane foam according to claim 1, characterized in that there is a means of attachment when it is not in use.

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