What is the sandblasting machine
Posted: Feb 23, 2017 Clicks: 766
Abrasive Blasting particles are accelerated from the blasting machine with compressed air energy. In order to by abrasive particles and compressed air to ensure effective cleaning requires professional skill, high quality equipment and quality control. Each element affects the result of the entire system. When cleaning unwanted materials are removed, the surface of the material becomes hardened and prepared for coating. With the blast cleaning of metal structures removed old paint, rust and other contaminants. In addition, when the secondary blasting removes scale that forms on new steel.
Angular abrasive particles attached to the surface roughness and create a profile, or a notch . Most paint manufacturers indicate what should be the profile to ensure the effective application of their products.
Builders clean brickwork before applying putty and paint. Abrasive blasting stucco and brick allows you to remove the old paint , mold , soot , pigments, and even graffiti , creating a perfect surface for coating.
Builders purified prestressed concrete panels, monolithic concrete walls, columns and other structures made of concrete, in order to remove residual cement, traces of formwork, faded areas and bare concrete.
In addition to the processing of steel and masonry, using blast cleaning can remove the top layers of paint from the wooden houses and boats. With glass using this purification typically removed topsheet gel coating to make visible air bubbles. Abrasive cleaning aluminum, titanium, magnesium and other metals removed of corrosion and, depending on the selected abrasive and the pressure profile applied.
New softer abrasive types (including plastics and wheat starch) as well as special equipment BLASTING low pressure used for the dry method for removing coatings from advanced composite materials. It allows you to clean airplanes, helicopters, cars, trucks and boats without the use of blasting, which can disrupt the structure of the surface. Moreover, switching to a dry cleaning method eliminates the possibility of the top layers worker exposure to toxic chemicals used in the purification and eliminates the costs associated with the disposal of hazardous waste.
Features blast cleaning varied. As the industry regularly to invent new materials and there is a need in the treatment of new surfaces, abrasive manufacturers equipment and materials necessary to continuously improve its technologies and equipment.
Blast cleaning using abrasives is a huge risk to the health of workers. Despite the fact that many of the materials used when blasting is safe themselves (steel shot and grit, kupershlak, grenades, etc.) dust generated during the work represents a great danger to the health of both the operator and the personnel is in the work area and can lead to serious occupational disease ( silicosis ). The operator needs to protect the respiratory system, hearing, eyes, skin. The abrasive particles are accelerated to a speed of over 650 km / hour, and should not be handling can cause injury to operating personnel. If this speed abrasive flow accidentally touches a person, it could cause serious injury or even death. Work on blasting rather noisy process . Operating noise is a constant threat to workers in the field of corrosion protection and asotsiirovalsya only the deterioration of hearing. Modern concepts of occupational health is considered noise as a threat to the safety and health of workers due to various reasons. Noise can not only lead to hearing loss (if constant noise at finding more than 85 decibels (dB)), but can be a factor of stress and increase systolic blood pressure.
Blasting is a work in an atmosphere in which the concentration of harmful gases and dust is dangerous to life and health. As PPE is necessary to use appropriate footwear, special suit the blasting, leather gloves, sandblasting helmet with forced clean air. To prevent the ingress of contaminated air into the respiratory system, respiratory protective equipment (PPE respiratory) should separate the worker from the environment polluted atmosphere and provide the employee with pure or clean air, breathable, this is done using an external source of clean air to feed the hose. At the same time the life of the blasting helmet may be extended by repairs and appropriate care.
All blasting equipment is divided into 2 types: Pressure devices. Their operation is based on the occurrence of excess pressure in the abrasive tank. The air mixed with the abrasive particles moving through the hose and discharged through the nozzle at high velocity pressure sandblasting gun on a metal surface. Injection devices. Here a completely different principle. The air starts to be injected into the compressor, then it passes through the tube and mixed with abrasive particles. With the high speed mixture is ejected from the gun, thereby damaging rust and dirt. In addition, the equipment for the job can be both open and closed. But the most important for sandblasting is a performance machine used. When you purchase it is necessary to pay special attention. For the processing of different materials used different pressure. So, to clean metal, this figure should be 5-7 kg / cm.
Sandblasting of metals performs several functions. It not only cleans the surface and increases the life of the product, but can be used for artistic purposes, for example for applying patterns. This so-called decorative frosting. This versatility makes the method popular. But sandblasting has several drawbacks. Among the main are: Too high consumption of abrasives. This is a rather dusty work, so it can be carried out only in a protective suit, leggings and a special helmet. In addition, the room air conditioner to be installed, whose task is to control the air temperature. Whatever it was, but today this technology is considered advanced and fully justified.