Sandblasting is a technique used dry to clean, remove traces of paint or dirt, with different types of sand and pressure depending on the surface on which it is intended to be used, thus leaving an elegant and resistant finish for any type of machine or assembled product desired.
To perform the technique of sandblasting, Domfesa has facilities that have
A completely isolated room to guarantee zero air contamination due to the volatile particles that form the product launched to carry out the sandblasting. The sandblasting room has a rectangular space of 8000×3000 mm, therefore we will be able to carry out the treatment to any machine or piece that complies with this restriction.
The blasting equipment consists of a reinforced and flexible hose of sufficient length so that the operator in charge of the blasting can move freely and reach the most difficult places of the sandblasted pieces with the greatest possible comfort. At the end of the hose we find the gun, with a totally interchangeable nozzle opening, which makes us control at all times the sand outlet pressure that can vary from (2-10 bar) depending on the material and the finish that our client wants.
For Domfesa the safety of our workers is paramount, therefore the operator has a specialized equipment for this treatment, which consists of a mask that protects you from volatile particles of sand once hit the metal, and a one-piece suit completely isolated from the outside to protect from the grains of sand that may bounce on the pieces.
Once the sandblasting of our pieces is finished, the used sand is removed and recycled for the next start-up, eliminating all the impurities that may be in it by means of a cyclone, which separates the pure sand from any remaining metal or paint that the sandblasted piece may have. Therefore, the environmental impact that this technique may cause is reduced to a minimum.
The machinery is totally avant-garde used to carry out the sandblasting, as the sandblaster is the heart of the pressure blasting system which allows us, by means of a remote controller, to vary the flow of abrasive that we want to expel and to regulate the output pressure without having to change the nozzle.

To carry out the blasting we use glass micro spheres, a material that is totally competent in our sector. Some of the specific properties:

Chemical composition: SiO2 (70-73%), Na2O(13-15%), K2O (0.2-0.6%), CaO (7-11%), Mg (3-5%), (0.5-2%)

-Hardness: 6 Mohs

-Color: White

-Density: 2,5g/cm3

-Granulometry: 100/200 microns

It should be noted that the glass microstructures are manufactured from flat and treated glass, without any toxic or carcinogenic components. Moreover, it does not produce ferric contamination so the glass beads are the most suitable for the treatment of stainless steel, aluminium and other non ferrous alloys. Even for non-metallic materials such as wood.
Therefore, once we know the process in which the surface treatment is carried out, we will show you the advantages of it:
– Satin and shading of pieces, getting a matt colored finish of the piece.
– Cleaning of INOX and pickling of welds, also eliminating calamine.
– Possibility of sandblasting on aluminium.
– Reconditioning and cleaning of parts by homogenising surfaces.
– Correction of defects in the parts, thus concealing surface defects.
– Pre-treatment for subsequent anodizing or coating of parts.
– Soft abrasive for cleaning turbos, aluminium parts, engines and moulds
Sandblasting with glass microstructures is focused on the following industry sectors:
-Refineries: For cleaning pump components, compressors, valves, pump shafts, fans, pistons, heat exchanger tubes and distillation tower elements, electrical parts, instrument parts and other accessories.
-Paper factories: Elimination of corrosion caused by chlorides at the contact points.
-Aeronautical Industry: Deburring in the manufacture of housings and different components.
-Cutting tool factories (automotive and mechanical engineering): For cleaning drills, reamers, milling cutters. Deburring of cutting wires, where resistance is increased and cleaning of cutting erosion in treated metal tools.
-Steel and aluminium factories: Surface finish for the removal of machining marks and preparation for subsequent coating and enamelling.
-Precision mechanics and optics: Deburring and preparation for galvanic treatment of mechanical parts, measuring devices. A non-reflective satin surface is created which allows a superior grip of the treatment.
-Gear factories: Cleaning of casting models; prevention of corrosion and cracking due to mechanical stress in order to prolong the parts exposed to stress; post-tempering and tempering treatment.
-Medical and Food Industry: Cleaning of models for ovens and instruments in contact with materials for human or agricultural consumption.

Domfesa has a specialized operator dedicated full time to the blasting of parts, therefore the delivery times to perform the treatment are usually very low, providing a service that is based on seeking the satisfaction of our customers by offering products and services that exceed their expectations.