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Sandblasted

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There are many industrial processes that can be used to clean , straighten or remove the rust that has accumulated with the passage of time, and old paint or some types of coatings that are not necessary. For this, there is sandblasting , which is a technique that consists of polishing or cleaning the surface by expelling a granulated abrasive by means of compressed air .

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What is sandblasting?

The sandblasting is a type of technical industry mainly used in order to remove paint or rust and it needs to operate air I tablet which is used as energy to shoot sand on surfaces that require cleaning.

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  • What is sandblasting?
  • History
  • What is sandblasting for
  • Types of sandblasting
  • Necessary equipment
  • Materials
  • Explanation of the process
  • Advantage
  • Disadvantages
  • Importance of sandblasting

What is sandblasting?

The sandblasting technique is also known by the name of sandblasting and consists of the projection of sand together with a jet of pressurized air in order to be able to clean different surfaces. It is important to mention that sand is a type of traditional abrasive and for that reason it is the main element of the technique. It is also known by the name of sandblasting and it is worth mentioning that today, most of the industries that apply this technique have replaced sand because it is considered a product that is harmful to the health of the people who carry out the process.

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History

The first antecedent that exists on the history of sandblasting dates from the United Kingdom in England when in 1870 , Benjamin C. Tilgman managed to design a machine with abrasive blasting, which he later succeeded in patenting. Over time, the machine underwent different modifications and was used for different purposes.

What is sandblasting for

The sandblasting is a technique that can be used in different applications and serves to remove corrosion and impurities that have accumulated over time with the aim of preparing a surface for placing then a new application or a different finish. In the graphic arts area , sandblasting can be used as a type of artisanal technique by means of which high-quality designs and signs can be engraved on surfaces, such as promotional items.

It serves to give brightness to the different materials, to metals refine non – ferrous, in cleaning structures metal , removal of impurities arising from the welds and to prepare surfaces with the aim of applying new coatings as it is the ideal means for them to achieve better adherence. It is very useful in the chemical , metalworking , textile , automotive , glass etching industries and in the metalworking industry.construction .

Types of sandblasting

Depending on the way in which sandblasting is applied, they can exist or be classified into two types:

  • Sandblasted with wet abrasive : this type of technique is used regularly mainly for cleaning the surfaces . In this case it is not used air compressed as a propellant means but a used current of high power of water which is mixed with a particular abrasive with the aim to remove old paint or to remove graffiti that have been painted in different walls.
  • Abrasive blasting dry: in this case itself used the compressed air with the aim to propel the abrasive. It is a technique that is used very frequently to remove the rust that is present on metal surfaces . To be able to apply it, a special permit is needed since it is an activity considered risky due to the great power with which the abrasive manages to be expelled.

Regarding the types of sandblasting, it is important to mention what other abrasive ingredients are also used to carry out this process and the following types can then be found:

  • Glass blasting: known as bead blasting, this process removes deposits using very fine glass particles under high pressure without damaging the surface.
  • Wheel blasting – uses the centrifugal force produced by a wheel to push the abrasive medium against the surface. It is categorized as an airless blast operation but has a lot of power, it feels good and the abrasives are recyclable.
  • Hydro blasting : it is known by the name of water blasting, it consists of a high pressure jet that is used to clean internal and external surfaces. It can remove old paint and chemicals without damaging the surface.
  • Grallanado : it is used to clean or polish metals I did an internship in the automobile, railway, construction and aeronautical industries.

Necessary equipment

Portable blast equipment will be needed which can be mobile. It generally operate with a compressor of air diesel which give large volumes of air at high pressure. The pomegranate pots are part of the equipment and consist of pressurized containers that have the shape of a tank which are filled with abrasive material. A blast cabinet will be needed, which is a type of closed circuit that makes it possible for the operator to blast the part and recycle the abrasive.

If the process is to be carried out within a certain place , then a room for sandblasting or sandblasting will be needed , a place where the entire process can be carried out with great safety. In addition, various types of abrasive materials are needed to perform sandblasting . Silica sand, garnet, some agricultural products such as crushed walnut shells, or synthetic abrasives such as baking soda and dry ice are commonly used.

The person in charge of carrying out the process must have protective equipment that includes a double-layer protection helmet , double lenses , air conduction tubes , regulating valve belt , filters for human respiration deodorized with activated carbon, protective gloves, front leather suit , safety boots , and Co. level gauges .

Materials

Various materials can currently be used to carry out the process, for example, carbon steel shot, cut wire shot, glass microspheres, calcium carbonate, aluminum silicate, quartz, walnut shell, copper slag, abrasives. minerals, baking soda.

Explanation of the process

Basically sandblasting process involves applying one amount determined sand or other material specific to the art in order to be able to remove the whole of the fats , oxides or paints from a given area. The first thing to do is prepare the surface to be able to generate a clean and homogeneous layer on the metal to be cleaned. Depending on the place where the process is carried out, suitable paints must be chosen and then painted the surface.

Advantage

Among the main advantages of this technique are the following:

  • It is considered a fairly simple process to carry out but it should always be carried out by a professional who knows the necessary precautions to take.
  • It is a technique that requires less amount of machinery since basically only the compressor, the jet container and a nozzle are needed.
  • It can be used in different applications and in different fields .
  • This process has the advantage of being able to be used in any type of material to be able to clean it.
  • Sandblasting can also be used to remove paint.

Disadvantages

Some of the disadvantages that may arise are mentioned below:

  • Because sand is used in the process , when proper safety measures are not taken , different types of lung diseases can occur .
  • Ideally, this process should be done in an area that is well ventilated to avoid drowning problems.
  • If there are unprotected people near the process , the particles that are expelled are like small steel balls and glass dust which are projected at an enormous speed, for this reason they can penetrate the skin.

Importance of sandblasting

Sandblasting is considered important as a part of the abrasive means having the great ability to properly clean the surfaces to a very low cost with materials that can be reusable . It is the ideal means to be able to prepare different surfaces in which later coating will be applied in an effective and durable way.

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