NL8501587A - FOAM APPLICATION GUN. - Google Patents

Abstract

Aerosol containers with foam content are inclined position fitted to an adaptor which is in open connection with a pressure chamber connected to an isolating valve and discharge nozzle. The valve (2) of the aerosol container (1) is screwed into an adaptor (3) which is in open connection with chamber (7) of the gun. The chamber is closed by a valve (8) operated by a lever. When the aerosol container is pushed down the valve opens. A fixed closing mechanism of the lid (5) of the top beaker (4) keeps the container and valve (2) in the required position. By pulling a lever, the valve (8) opens and foam flows from chamber (7) to the discharge nozzle (10).

Description

-1-

Foam applicator gun.

The invention relates to a foam applicator gun for dosing and applying 1-component foam from aerosol cans.

1-component foams are usually supplied in aerosol can-5s, from which the foam is sprayed onto the can by means of a siphon or pressure valve via a plastic nozzle.

The following problems arise with this application method of foams: a. Dosage of the foam can hardly be controlled, so that a lot of foam has to be cut away after curing.

b. The siphon valves can only be partially opened, so that the foam flows slowly at low temperatures and the buses cannot be completely emptied after some use if the pressure is lost.

C. During storage, certain foams form granules and / or membranes, which can prevent the valve from closing on the can after use. The foam and / or the propellant then continues to flow out, so that the remainder in the can is no longer usable.

20 d. When the foam canister is interrupted for some time, foam remains in the valve. This foam cures by the action of air humidity.

The cured foam can sometimes not be completely removed, making the can further unusable.

25 e. When using the nozzles, use both hands to hold the can and operate the nozzle, which is very difficult in many situations.

The object of the invention is to provide equipment for solving said problems.

This objective is accomplished by: a. Placing the foam aerosol can into a container, with the foam flowing into an enclosed space (gun chamber) after opening the canister valve.

b. Open the valve on the canister only after it has been connected airtight to the gun.

c. Dosing and application is done through an 8SC1587-2 adjustable handle, which opens a mounted valve on the gun chamber.

The marketed pistol, MBS P20, does solve the aforementioned problems, but at the same time creates other difficulties.

a. To place the foam canisters on the NBS P20 gun, the canisters must be mechanically fitted with a threaded ring that fits this gun.

10 As a result, the normal foam cans cannot be processed with this pi stool.

b. The chamber of the NBS P20 gun is closed by means of a needle. The foam is spread by this needle such that most foam types do not yield a homogeneous solid foam quality after processing with this gun. Therefore, a special type of foam must be manufactured for this.

c. The NBS gun contains moving parts (needle, recoil ball with spring) that must move in the foam.

20 Contamination of these parts makes this gun susceptible to malfunction.

d. Cleaning the gun, NBS P20, is so complicated that it is recommended to leave it to the manufacturer's expertise.

The invention will be explained in more detail with reference to the drawing, in which an exemplary embodiment has been proposed.

The drawing shows the foam applicator gun shown in 1: 2 scale and a section of the gun in 1: 1.2 scale.

30 The valve (2) of the foam canister (1) is screwed tightly into the adapter (3), which is in open connection with the chamber (7) of the gun.

The chamber (7) of the pistol is closed by means of an externally operated valve (8).

35 With the lid (5) of the top cup (4 ·), the foam canister (l) is pressed down, so that the valve (2) of the foam canister (1) is pressed and thus opened.

A fixed closure (6) of the lid (5) on the top cup (40) keeps the foam canister (l) and valve (2) in this position.

s 5 ö 1 5 8 7 - 3 -

The valve (8) is opened by operating the trigger (9). The foam from the chamber (7) of the gun flows through the. valve (S) and is applied via the nozzle (10) at the intended location.

5 As the trigger (9) is retracted further, the valve ^) will open further and more foam will flow through the valve (S) to the nozzle (10).

This way the foam can be dosed cleanly.

The only moving part that comes into contact with the foam in the gun is the valve of the valve (8). The close-fitting seat of the valve cleans it with every movement.

The nozzle (10) and the outside of the valve of the valve (S) are easy to clean.

The entire gun can be disassembled, so that if the foam is contaminated or hardens in the gun, e.g. due to improper or careless use, all parts are easily accessible for cleaning.

The adapter (3) is designed in such a way that it fits most of the bus valves (2) of the foam canisters (1) in use.

20 The closure of the lid (5) on the top cup (6) can be adjusted to different lengths of the foam cans (1).

The angle required to open the siphon valve (2) of the foam canisters (l) is so great that it allows the diameter of the top cup (4 ·) to be chosen to the largest diameter of many 25 aerosol cans in use (1).

In this way, a foam applicator gun is provided, which is nearly universally usable, reliable and easy to maintain.

531587

Claims (1)

- 4 - Foam applicator gun for spraying 1-component foams from aerosol cans, characterized by an adapter-sealed connection of the valve of an aerosol canister placed in the gun with a space in the gun closed by means of a valve, whereby closing of the lid on the top cup of the gun the valve of the placed aerosol can is pressed and opened and whereby the valve of the gun can only be operated from the outside, so that no other parts which must be movable for the functioning of the gun come into contact with the foam, then the valve of the valve. t @ 5015S7