Sandblasting nozzle for Karcher: sandblasting from a high pressure washer
Piskostrumna nozzle, made ??with their own hands and used for installation on a serial device Karcher, will allow you to turn such equipment into a full-fledged sandblasting unit, useful in many situations. Most Kercher washing machines operate under high pressure, therefore their technical capabilities are quite sufficient for feeding through such a nozzle of sand. The difference between such a homemade device from the classic sandblasting will be, that the sand through its nozzle will be fed along with the water, but this is not critical for many situations.
Kit for wet sandblasting "Kercher"
How the nozzle for sandblasting works
The principle of operation of any sandblasting unit is, that the abrasive material from the special hopper enters the nozzle under the influence of air flow, supplied under high pressure. In serial installations for creation of such pressure, due to which the jet of sand, coming out of the nozzle, a significant kinetic energy is reported, a separate compressor is used. In the case of the Karcher washing machine, the built-in pneumatic equipment will be used for this purpose. A serial pistol can be used as a nozzle for such equipment, specially designed for equipping pneumatic treatment plants, but not to spend money on such a device, it can be easily made with your own hands.
To make your own homemade sandblasting nozzle, which you will use to install on the Kercher device, was effective and did not interfere with work, for its production it is necessary to use high-quality materials.
The principle of operation of the installation of wet sandblasting rust
Of course, assembled in this way equipment with a large stretch can be considered as a full-fledged sandblasting, but to perform it with the help of cleaning various surfaces with a jet of water, mixed with sand, it is quite suitable. When using such a sandblasting device, it is very important to follow two recommendations:
- it is better to use distilled water as a working liquid, that will avoid corrosion of metal elements of a nozzle;
- sand, which will be used as an abrasive, must be very fine fraction and carefully sifted.
Scheme of the nozzle for sandblasting (click to enlarge)
The device for sandblasting assembled by own hands, the basic elements of which are a Kercher mini-sink and a homemade nozzle, will work according to this scheme.
- When you press the start button on the nozzle gun, the water is under high pressure, created by the compressor, passes by the holes of the intake hose, the other end of which is placed in a hopper with sand. So, a vacuum is created in the intake hose.
- Under the influence of vacuum from the hopper sand is sucked into the main hose, where it mixes with the flow of water.
In order to minimize the consumption of sand and bring this parameter to the value 30 kg of abrasive for surface treatment with a diameter 70-80 cm, the design scheme of this equipment must be supplemented with taps and dispensers.
Homemade faucet made of water taps and tees
Production of a self-made nozzle
In order to turn Karcher mini-washers into an efficient sandblasting system with a homemade nozzle, you will need the following design elements:
- nozzle, through which a mixture of water and sand will be fed into the treatment area;
- trigger;
- reinforced hose, which will be able to withstand high pressure;
- dispenser, necessary for that, to make the consumption of abrasive material more economical.
Nozzle scheme: 1 - carving; 2 - low pressure chamber; 3 - nozzle; 4 - fitting for sand supply; 5 - the place of connection of two parts of the nozzle; 6 - smooth narrowing transition
On the nozzle, if you are going to use your sandblasting device regularly, it is best to buy a nozzle, made of ceramics. So nozzle, which is constantly under the influence of abrasive material, will last you much longer, than its metal counterpart.
Homemade water-sand nozzle
Details of a nozzle: 1 - pistol; 2 - nozzle; 3 - nozzle holder; 4 - piskostruminni nozzle
On the efficiency of the sandblasting machine with a homemade nozzle, which you will equip the Kercher sink, the quality of nozzle manufacturing has a huge impact. It is necessary to start independent creation of such element only in that case, if you have the ability to drill a precise hole in the metal rod, whose diameter is not less 15 mm. But if there is no such possibility, it is better to buy a factory nozzle, the work of the whole device will depend on the quality of its production. The expediency of purchasing a serial nozzle is also, that some models of such products are already equipped with triggers.
Choosing a hose, the length of which must be at least 2 meters, you should pay attention only to reinforced products. This is explained not only by that, that such a hose will operate under high pressure, created by the compressor, but also so, that its inner walls will be constantly affected by abrasive, which will quickly render the non-reinforced product unusable.
Starting to assemble and mount the nozzle to equip the Karcher washing machine, the following algorithm of actions should be followed:
- on the nozzle of your homemade nozzle with a threaded connection you need to fix the ceramic or metal tip;
- dispenser, with which you will regulate the flow of water-sand mixture, coming under high pressure from the nozzle, should be mounted on a metal or ceramic tip of the nozzle;
- hose, on which from the bunker sand will be given, must be fixed on the back of the nozzle, for what the union and a collar of the corresponding diameter are used.
The scheme of work and an example of making a nozzle for sand collection
Carrying out assembly and installation of a nozzle for Kercher, should take into account the fact, that all elements of such a device will operate under high pressure, created by the compressor of the device. That is why it is necessary to ensure maximum tightness and reliability of all formed connections. This requirement is easy to fulfill, if you make such connections using a special fume tape.
There is another trick, which will allow you to save abrasive material. It is as follows: cleaning must be performed over a special container with a lattice, in which the spent mix of water and sand will gather. This mixture can be reused, lowering the end of the reinforced hose, which is connected to the nozzle of the device. A grid on the top of this container is a must, it is necessary for that, to keep treatment waste and prevent it from getting into the water-sand mixture.
Kercher sink with sandblasting nozzle at work
For what you can use a homemade sandblasting machine
The efficiency of using a sandblasting unit with a homemade nozzle, assembled on the basis of the Kercher apparatus (Karcher), provided by that, that sand, mixed with water, fed from the nozzle under high pressure, which creates the device's built-in compressor. Possessing significant kinetic energy, such a jet of abrasive is able to effectively clean various surfaces.
It takes no more to clean a propane cylinder from rust and paint 5 minutes
Homemade sandblasting, assembled on the basis of the Karcher sink (Kercher), can be successfully used to solve the following tasks:
- cleaning surfaces from various contaminants;
- removal of old coatings from surfaces: paints, glue, construction mixtures, etc. .;
- removal from metal surfaces of sites, prone to corrosion;
- stripping of metal surfaces before their further processing.
Despite the simplicity of its design, self-made nozzle for Kercher devices, designed to perform sandblasting, shows high efficiency at cleaning of various surfaces.
They, that such a nozzle is a convenient and effective device, demonstrates well the video of its application. This is a video, as well as rollers for the manufacture and assembly of such a device, can be easily found online.
Recommendations for safe use of the nozzle
Using a homemade nozzle on the Karcher device for sandblasting, safety requirements must be observed when working with such equipment. In the process of using the Karcher washing machine, only water is supplied from its nozzle, is not capable of harming the health of the operator. In the case of using a nozzle for sandblasting from the tip of such a device in addition to water under high pressure is also sand, which can seriously injure a person, manager of such equipment. That is why when using such a nozzle it is important to strictly follow the following safety rules:
- processing should be performed only in special clothing of the closed type;
- footwear, in which processing by means of such device is carried out, must also be closed;
- all sandblasting work is best done outdoors.
Means of protection when working with sandblasting
Given that fact, that when using the Kercher device and the self-made sandblasting nozzle processing is carried out by means of a mix of sand and water, it is not necessary to use face and respiratory protection in such cases.
Starting to make a sandblasting nozzle with your own hands, should be considered, that it will work effectively only if, if the compressor of your Karcher mini-sink is capable of producing a jet of water under fairly high pressure.
More on the topic:
> Sand with your own hands: drawing, video, manufacturing instructions
> Homemade gun for sandblasting
> Sandblasting chamber with your own hands: drawing, components, collection
