Pistols for foam: device type and characteristics, manufacturers

Polyurethane foam - home or professional - is required for installation of plastic windows, replacement of old doors, sealing and insulation. To work with professional varieties used a special tool - mounting the gun.

A device for pistols foam

Before examining the functioning of the instrument, it is advisable to familiarize yourself with the general description.

Design

Its colloquial name for foam gun received a similarity with handguns. There are a number of common components, similar to each other and to the destination device:

• Trunk. Through "fired" pressurized liquid substance, which is subsequently polymerized in the solid foam structure.
• trigger. The trigger for actuating the release mechanism of the foam cylinder.
• Handle (pistol). It is intended for fixing a tool in the hand. It allows you to manipulate with one hand.
• Adapter. Analogue pistol holder. In this case, its role is assigned to the balloon with foam.

The tool also provides a mechanism for adjusting the supply of foam - a fixing screw. It controls the speed and volume of foam. The barrel end fitting through which ejected polyurethane.

Principle of operation

Before working cylinder is kept to 6 hours in a room with a positive temperature. Vigorously shaken 15-30 times, after which the protective cover is removed from the cylinder head.

Further:

• Flowing the trigger is actuated release mechanism, the valve opens the way into the barrel cylinder contents.
• While moving inside the tube is "boiling" of the prepolymer and the transition in the foamed state - comes the primary extension.
• polymer stream leaving the nozzle as a fine stream moving at a certain speed, receives the main volume increase. It expands to 60-90% of the final value.

The direction is determined by the operator, which controls the instrument. exit velocity and volume of the material is regulated by the locking screw and the degree of opening of the container by means of the trigger mechanism. Recent actions depend on the experience and skills of the master.

Types and characteristics for pistols foam

The design tool executed collapsible or non-separable. Last - the one-time gun used for short-term operations. The apparatus is inexpensive type formed almost entirely of plastic.

Control functions are not available, can not be repaired.

Demountable type - reusable device to be repeated application and repair. Made of metal or special high-strength plastics. It is possible to replace individual parts of the structure.

applicable material

The material used affects the durability, strength, productivity and cost of the tool. The main types:

• inexpensivelyth plastic. It is used for one-off designs. Advantageous to use in the repair of the dwelling. Enough opportunities for installation of plastic windows 2-3, 1-4 replacement door frames, sealing of balconies.

But the work is necessary to make one or two days. For longer periods, the internal cavity clogged solidified foam and the machine fails.

• Metal-plastic. Inexpensive kind of tool that can be used to repair the multi-room apartment or house. Maintainable require rinsing after use. The balloon with the remaining foam is recommended to remove.
• Metal. professional-grade tool. Expensive, but pays off in the event of heavy use. Designed for people who are constantly working with assembly foam.

• Metal-Teflon. Metal parts in contact with the polyurethane material, coated with Teflon. Thanks to this frozen sealant is removed without a trace. Beneficial for continuous operation - a tool of roads and does not justify itself in a single transaction.
• high-strength plastic. Using durable polymers for main parts - the handle, housings, adapter - reduces the cost of the tool without loss of functional properties.

appointment

Handheld type gun assembly is used with a portable container. This increases mobility in the work. The apparatus compact assembly is obtained, the overall dimensions do not exceed 50 cm.

Industry produces another type of product to use when working with an external compressor - pressure gun.

Principle of operation:

• The prepolymer is fed through the valves in the gun issue, wherein compressed air is caught and crushed into fine particles.
• Feed at a high speed moving toward the surface being treated.
• The droplets adhere to the plane, the substance reacts with atmospheric moisture, thereby forming a porous structure.

This operation is used to form the heat insulating layer. The latter has a high thermal insulation, good adhesion to a base and a single monolithic structure.

Options and accessories

Hand tool comes in a cardboard or plastic packaging (blister) with fastening elements on the trade and exhibition equipment.

For work in remote places of the models equipped with attachments:

• Conical shape. They serve to fill the narrow gaps, cracks, holes of small diameters.
• Extension in the form of a flexible tube of polymer. It is used when working in tight spaces.

In case of late cleaning devices and means liquid foam solidifies last removed mechanically. To this end, the nozzle kept 2-7 days before the final setting and drying polymer.

Thereafter, solidified sealant is extracted by a sharp object.

Benefits

• Professional polyurethane has a dense structure, since the internal cells are obtained from the polymerization of smaller size than the container of the domestic.
• The foamed product at the outlet receives the expansion ratio of 60-80% of the final volume. Therefore, the design of precast expansion efforts will be minimal.
• To determine the consumer volume of foam required a good knowledge of the properties of the product and a solid work experience.

• Work with a gun is much more practical and more convenient, since only one hand is occupied by the operator. Free hand committed additional operations, for example, fixed object to be treated.

Specialized tools the average price class will pay for itself in the repair of 2-room apartments or the construction of a country house. For the masters, whose earnings is to carry out finishing work, this kind of adaptation is urgently needed.

disadvantages

At work there are some problems associated with the use of an inconvenience to the structural assembly:

• Balloon with foam in relation to the horizon should occupy an almost vertical direction. When working under the ceiling using a gun becomes difficult.

To overcome this limitation should apply lengthening tube. But then lost usability, in this case, the operator engaged in both hands.

• Assembled structure with the human hand holds on two planes in the space of 35-45 cm, which greatly limits its use in tight spaces. Regular extension cords supplied, in this case, of little use.

Can help in such a situation, the medical tube of the dropper, but its length should not exceed 50-60 cm. Otherwise, foam pushing force is not enough pressure in the cylinder.

• At breaks in work more than 2 days and half-empty containers and more instrument must be disconnected from her and cleaned. In this case, polyurethane residue disappears, re-use of this bottle will not work.

Other problems - it is human forgetfulness. For example, an error in the calculations in the required amount of sealant or absence wiper leads to additional time.

How to choose

On examination, it is required to pay attention to completeness of the information displayed on the packaging. In addition to the characteristics and description of the design must include information on the country of manufacture, the name and address of the company ..

Primary indicator instrument performance - the sealing and the ability to keep the internal pressure.

inspection

• On the production of pressurized, so when you press the trigger of a new product the excess air out through the barrel with the characteristic hissing sound. This demonstrates the integrity and ability to work under pressure.
• Additional verification - work with the cleaner. For this purpose, a new product container mounted with the liquid inside the pressure. Pressing the trigger release mechanism is activated.

• Material from which made the gun, says the estimated service life and durability. Cheap plastic - disposable feature. Conversely, durable polymer shows long service life.

Which is better

should focus on the following parameters in choosing the best device:

Material of construction and a combination of indicator "price-quality" (in descending order):

• Teflon coating;
• all-metal product;
• high-polymer;
• metal-plastic;
• inexpensive plastic.

repairability, Ie the ability to parse and parts replacement.

A mechanism adjusting the volume of polyurethane foam and supply rate.

manufacturer's brand. It has long been working on the market, the manufacturer strives to produce only high-quality and reliable products.

Exploitation

At work it is necessary to observe safety precautions:

• The prepolymer is stored in a closed container under pressure, so it can be reheated in a temperature environment of not higher than 30-35 ° C.

• Polyurethane, which is in the gas-liquid state, is flammable and explosive substances. It is impossible to fill pistol operate near heaters, especially near an open flame.

• It is not allowed to direct an instrument fitted out on humans, animals, fuel appliances. Accidentally pressed the trigger or unintentional activation of the product may result in serious injury.

• Shift generated cylinder should be performed carefully and as quickly as possible: under the influence of residual pressure there is risk of splashing on surrounding objects.

polymer residues can quickly harden in air, which will cause the loss of time on the cleaning tool.

application rules

• The container with foam is directed upwards.
• At the end of the agitation container is screwed onto the adapter without undue effort. About connected correctly signal a characteristic hissing sound.

• Regulator opens by rotation by a quarter of a circle. Directing the nozzle into an unnecessary capacity is necessary to achieve the required flow consistency.
• The prepolymer is directed deep into the filling space. The quantity of the sealant should not exceed half of the total free volume.

End of work

Capacity to be removed from tools nevyrabotannym substance is not recommended if a break between operations will not exceed 3-7 days. The tip of the nozzle of the sealant residues to clean is not required - this will increase the tightness of the device.

When developing the entire polyurethane balloon is removed, the instrument is washed with a cleaning liquid. The flow controller is covered.

Guarantee

The warranty period for the product is indicated in the accompanying documentation (passport, instructions on the package). But this applies only to branded products.

Replacement or repair to be products that have:

• external damage;
• failure operation of the trigger mechanism including trigger;
• mismatch threaded adapter parts and foams;
• seal failure.

The latter conditions are checked in the presence of the seller or at home. Bring a claim within 7 days after the sale. If there are signs of external interference or attempts to repair the claim will not be accepted.

Faults and repairs

Disclaimer shown after outages. It consists in nepropuske foam through the device. Causes - clogging the internal cavities of the construction frozen sealant. Correcting this defect - the analysis and purification of a gun.

For such operations require:

• cleaning liquid and (or) acetone
• a knife with a thin, sharp blade,
• awl or acute screw with a long threaded portion.

The solidified polymer was removed by mechanical means, washed cavity fluid.

Mechanical failure of the tool or disposed directed to spare. Repair in most cases not be possible due to the fact that the components difficult to find. Therefore, the new structure is acquired.

Manufacturers guns for assembly foam

The Canadian company, which manufactures tools Building and economic purposes, including to work with foam:

• -Nozzle spray guns to operation with conventional cylinders without special attachment;
• Domestic class tool;
• products for DIY decorators;
• Pro class.

Official dealer FINCH INDUSTRIAL TOOLS CANADA INC in Russia.

The tool of the German company can be safely attributed to the professional series. This is evidenced by a Teflon coating of all manufactured models made of metal. Suitable for artists, constantly working with the foam products.

Company of Germany produces tools for semi-professional and professional use. Almost all the parts are made of metal but of plastic handles.

One of the most prominent companies in the Russian Federation, with headquarters in Germany. It produces different models: light "disposable" device with a body made of inexpensive plastic and professional design of metal for permanent use.

company's brand is registered in Germany. It produces three models:

• Domestic class housing and inexpensively from polymer adapter;
• semi series with metal casing, teflon-coated needles and supplementary nozzles;
• pro-class fully coated with Teflon.

The Russian company, focused on mass consumer and professional tools and various household goods. It produces several series of tools:

• Expert,
• Standard,
• Master,
• Professional.

Series differ from each other by the presence of special processing (barrel polishing or adhesive coating), O-rings, the housing material.