Abrasive blasting
A sandblaster is a technical device, with the compressed air or a blower, a blasting agent (sometimes sandy, but today most of other materials such as blast furnace slag, glass bead, aluminum oxide, steel, plastic pellets, nut shells, soda, ice crystals, CO2 snow pellets ) on fixed assets is blown to rid them of rust, paint, burrs or the like, or roughen them. The application of the device is also called sand blasting.
Since many of blasting agents are hygroscopic, ie moisture, also absorb humidity in sandblast and sandblast boilers, dry air is required. Of a compressor supplied air pressure can only be used for sand blasting, if it has been cooled and dried.
Blasting with silica sand is not allowed in Germany, as this may cause silicosis. It is often used as an alternative blast furnace slag or applied the so-called Schlämmstrahlen.
When Schlämmstrahlen the abrasive is enriched up to saturation with water. Unlike jet blowers for dry blasting media Schlämmstrahlen produced with wet or soggy beam means a much lower dust load for the beam staff as well as for the environment. Another advantage over the dry blasting is the reusability of the abrasive. The first patent for a jet system by this method was 1994 filed by Hubert Busch from the Rhenish Langenfeld and issued by the German Patent Office.
In the same year, the low-pressure process by Karl Schmidt, owner of Schmidt sandblasting technique from West home has been developed. This method is suitable for the gentle rehabilitation of surfaces of all kinds with all commercially available granules - particularly for the construction industry as well as a stonemason and restorer. The gentle cleaning with low blasting pressure when the grains in the 45 - to 90 -degree angle controlled and targeted strike, causes a uniform and precise spray pattern. Principle, however, plays the entire device and Beam Technology a major role.
Sandblasting can also be used in the art for processing items; This art form is called sandblasting. This also includes the sandblasting of glass, in which clear through the sandblasting glass, eg for interior doors, can be matted or very partial coverage.
The sandblaster was invented in 1871 by American Benjamin C. Tilghman and is based on the basis of the jet pump. Tilghman was an officer in the Civil War and came to a farmstead over, in which on one side of the house all the windows were opaque instead of transparent. When he asked what it would come to this, he was informed that very often a sharp wind from a hilltop on the homestead bubble, which take with a lot of fine quartz sand. This gave him the idea of sandblasting, which he realized industrially after the war. The first applications were dull figures, which were applied on shiny background.