Shot blasting method prevent metal fatigue or cracking as well as for cleaning and surface hardening. In this method, role of shot is to remove impurities, rust, scattered pieces of rubbish or remains that may affect metal strength. It is environment friendly and a rapid, cost effective surface finishing method which is used for cleaning, polishing metal and other surface by applying high speed stream of shots.
There are two Technologies used in Shot Blasting Machine:
1. Wheel blasting- converts electric motor energy into kinetic abrasive energy by rotating its wheels. Each wheels capacity goes from 60 kg a minute to 1200kg/min. Wheel blast machines are used where big parts or large areas of parts to be cleaned at the same time.
Wheel Blasting is a blast operation without air instead uses a wheel with centrifugal force to propel the abrasive against the parts. Because this wheel spins at 3600 RPM with a high velocity and high efficiency blasting operation with typically quickly time cycles. Due to its high velocity this type of blast utilizes metallic abrasives such as steel shot, steel grit, stainless steel shot and grit and cut-wire which are available in different hardness.
The advantage of wheel blasting is its speed of cleaning and the ability to efficiently blast large components. Also, it does not require compressed air to operate like air blast equipment. This can be economically very high, especially when blasting a large component which will require multiple air blast guns. However, the high velocity is also its nemesis because it can damage parts that can’t handle this pressure and you are also limited to the type of abrasive that you can use.
2. Air-blasting- In this procedure machine can take the form of a blast cabinet; the blast media is accelerated by compressed air and projected by nozzles in component. Also a media-water mix can be used in it for some of special applications, that would called wet blasting.
In this procedure machine can take the form of a blast cabinet; the blast media is accelerated by compressed air and projected by nozzles in component. Also a media-water mix can be used in it for some of special applications that will be called wet blasting.
Shot blasting process is used to prepare the surface of metal before applying any coating by removing debris and paint. Every industry that uses metal applies this method in daily practices for removing of corrosion, paint and other films and preparing surface for coating. This Shot blasting method produces a roughened texture to improves adhesion of ornamental toppings, therefore it leaves the substrate dry or clean that get ready for recoating also. Cast iron work is also shot blasted to remove old paint layers.
Shot blasting process is used to prepare the surface of metal before applying any coating by removing debris and paint. Every industry that uses metal applies this method in daily practices for removing of corrosion, paint and other films and preparing surface for coating. This method produces a roughened texture that improves adhesion of decorative toppings. It leaves the substrate dry or clean which is ready for recoating. Cast iron work is also shot blasted to remove old paint layers.
Shot blasting machine mainly consist of six basic parts: blast wheel, cabinet, work handling mechanism, elevator, separator, dust collector. Different machine are used for different purposes like table type machine is used for heavy components and portable air operated machine is used for cleaning casting. The numbers of wheels installed in machine depends on the type of job to be shot blasted and rate of work. Role of shot also depends on work For example: A smaller size steel shot can be used to produce smooth polished surface while large shot can be used to remove heavy flash. In most industries shot blasting works by using wheel with paddle type blades that propel steel shot at surface with high velocity. This entire process is done in an enclosed chamber that separates the dust which is sent to separate dust collector. This entire process is controlled by many factors such as shot impact force, size of shot, rate of machine level and concentration used. Blast machines are used in welded construction industries by facility owners for cleaning, controlling of corrosion and preparing surfaces.
The main function of shot blasting machine is the motion of projectile to hit the metal surface for removing contamination of surface to improve strength of metal. Blasting machine perform many tasks like cleaning, rust removal, producing uniform cosmetic finish, texturing for mechanical function, texturing for adhesion, die casting etc. Blasting machine also provides protection of metal from corrosion which may occur depending on environmental and working conditions. It leaves substrate dry and clean preparing surface for recoating.
Every industry that uses metal including foundries, forging plants, automotive industries, chemical and petroleum industries, ship building industries, heavy engineering industries, Indian railways defense organization etc. can buy blasting machine.
Points to remember while buying shot blasting:
Always choose quality spare's for buying shot blasting machine because blast results are based on type of machine you have chosen along with the selected blast media. Shot blasting manufacturers always offer genuine, economical and quality spares for all type of blasting machine. They research extensively and adopt latest technology method to develop device processing parts. They have many years of experience in manufacturing excellent quality blasting machines. Each type of machine performs different tasks for preparing surface. Some units are better than others for certain tasks. Quality spare knows everything about machine. They understand your needs including need to clean work piece type, size and processing to achieve the desired effect. So they can help you to find the best fit for particular project. Here is some of the reasons that have enabled us to scale the pinnacle of this line of work:-
The Standard Unit This is a contractor’s machine Finished in blue hammerite. The machine is capable of operating continuously at a maximum working pressure of 150 PSI.
The BP50-1 Blast Pot is a small compact blast pot ideally suited for touch up blasting applications, and for use in confined spaces where access is restricted.
Hazardous duty hand light making it ideal for inspection or small area illumination. This explosion proof drop light with tempered glass globe and full swivel hook, suitable for max 100w bulb.