Sandblasting Services Providers in India

Sandblasting Services Providers

Short Overview of Different Parts of Shot Blast Machine

Shot Blasting is a process used for the treatment of surfaces with the assistance of high velocity steel abrasives. The shot blasting method aids in obtaining exceptional cleaning and preparation of the surfaces for the secondary finishing operations.

The process of shot blasting is commonly used for the purpose of the following:

• For cleaning of metals like: iron, steel, forgings, non- cast parts and many more.

• For mechanical cleaning of: sheets, wire, rods, coils, etc.

• For shot peening to alter the mechanical properties such as for increasing resistance to fatigue for springs, gears, etc.

• Preparation of surfaces for secondary operations like painting, coating, etc.

In general, the process of shot blasting focuses on throwing the abrasive particles at a high speed of 65 to 110 m/second in a highly controlled way at the material to be blasted and as a result removing the contaminates on the surface with the help of the abrasive impact. 

When the process of shot blasting was on its peak in the 1930s it was used with compressed air for propelling the steel shots and this method still remains in use today for cleaning of metal frames and weldments. The shot blast production lines (both manual and automated systems), only became possible after the introduction of the centrifugal wheel blast machines. The system of shot blasting with the centrifugal wheel has proven to be more productive than by the compressed air and achieves a better and more uniform finishing of the surface.

The criteria used for the selection process of the type of shot blasting system and machines depends on the size and shape of the parts to be blasted, the condition of the surface to be cleaned, the required final surface finish specification and the overall required process.

There are numerous companies which offer these types of shot blasting machines and equipment for different shot blasting processes. But, the question arises how should one determine which is the best machine for your effective as well as qualitative work?  

The Shot Blasting Machine

For understanding which is the best option, one must gain complete knowledge about the concept of the process as well as the machines that are used for the shot blasting process. 

Different Parts of the Shot Blast Machine

The shot blasting machine consists of six different parts:

• Blast Wheel

• Cabinet

• Work Handling Mechanism

• Elevator

• Separator

• Dust Collector

To determine the role each part of the machine plays in the shot blasting process it is important to acquire the complete knowledge about the sandblasting process and machine. The following is a detailed description of the function of each part of the machine in the shot blasting process:

1. The Blast Wheel

The wheel is the focal part of every centrifugal shot- blasting machine. The wheels help the abrasive particles which are projected through the centrifugal force from various types of turbine wheels. If the quality of the wheels is at an optimum level then the efficiency as well as the cleaning effect turns out to be great.

2. The Cabinet

Just like the blast wheel, the cabinet too is an important part of the shot blasting machine. As, the high speed of the abrasive particles have to be treated in a closed and vibration free cabinet. This helps in ensuring their strength as well as their durability, these cabinets are made with the assistance of superior quality of the steel material.

3. The Work Handling Mechanism

Most of the systems within the machine exist for conveying the parts which depends on the type, size and the quality of the items that need to be treated. There are a variety of types and designs of the shot blasting machines that are used for different working process like the Table Type Shot Blasting Machine, Hanger Type Shot Blasting machine, Tumb Type Shot Blasting Machine, Paver Block Shot Blasting Machine, Cabinet Type Shot Blasting Machine, Spinner Hanger Shot Blasting Machine, Spinner Hanger Double Door Type of Shot Blasting Machine, Stone Shot Blasting Machine and Coil Shot Blasting Machine.

4. The Elevator and Abrasive Recovery System

This part holds a special place in the machine and maintains a steady functioning of the machine by helping the machine to recover the used abrasives. The abrasives are recovered at the base of the cabinet with the help of a screw conveyor and are further delivered towards the base of the elevator, which then carries these abrasives to the separator for further action.

5. The Separator Section

The Separator plays an extremely important role in the abrasive blasting machine. This is the essential part that helps to clean all contaminants before abrasives enter into the blast wheel for reuse.

6. The Dust Collector

This is the final and the most important part of shot blasting machine. The dust collector is a part that is used mainly for the purpose of filtration. This important part helps in retrieving the dust filled air from the separator and from the dusty air that gets trapped in the cabinet ventilation system and releases clean air into the atmosphere for ensuring an environment that is pollution free.

If your industry demands the process of abrasive blasting and you are in a need of a great quality machine, then it is important to get a basic knowledge of the above mentioned parts. The analysis on the above mentioned parts help in developing an eye for the functionality of these parts before taking the final decision of which is best machine according to your needs and requirements. This is so because choosing the right type of machine can ensure efficient, quick and optimum level of cleaning for your surfaces.

Sand blasting is a difficult process and requires the use of professionally equipped techniques and equipment to employ this process correctly. To provide you with this efficient system of blasting services with the ideal shot blasting machine, Quality Spare Centre a leading trader, supplier, and exporter brings to you a range of metal shots and machines. Its efficiency has become the a highly acknowledge facet of this company in providing competitive services as well as machinery for the blasting and painting industries. A premium brand name in this industry with its niche variety of services provides accessories for protective coating industries as well.

Source: http://www.shotblasting.org.in/overview-of-different-parts-of-shot-blast-machine.php

A Guide to Understanding Steel Grit and Steel Shot

The technique of sand blasting has provided many different ways to clean up, strip, or even out the surface of different materials. Although the ancient mode of blasting- sand has now long been banned for usage due to its dangerous silicosis, there is still a huge range of much safer substances that help to create a perfect finish- be it the restoring of parts of a structure or just basic refurbishing of smaller items.

Blasting is essentially of two main types that are most commonly used, which include shot blasting and grit blasting. Both the blasting techniques use different types of materials but are often regarded as a part of sand blasting to provide an overall effect of their purpose.

To provide a cost effective and efficient blast cleaning operation, features such as a basic understanding of the characteristics of the steel blast cleaning abrasives, their selection as well as use and the knowledge of the blast cleaning machinery, its maintenance and key process control features.

Industries in the metal working business are the principal users of cast steel shot and steel grit:

·         Steel mills

·         Ferrous and Nonferrous Foundries

·         Forge shops

·         Metal Fabricators

Blast cleaning with the use of steel abrasives is a vital and critical operation at various different stages of the primary metal production.

Steel Grit and Steel Shot are two sand blast Medias that are most commonly used in today’s industries. These can be used for a huge variety of applications to meet different goal requirements. The following article will help you build a strong understanding about both these Medias.

What is Steel Grit?

Steel Grit is available in a variety of shapes and sizes that will allow in administering a variety of blast profiles for obtaining different results. This type of grit is angular in nature they way it has been created. This grit is ideal for helping to remove the contaminants from the surface of various products and it also creates a last profile for new coating to adhere to. The most common uses for steel grit are removing of mill scale, removing different degrees of coatings from the surface of products and a typical grit sizes that are most commonly used range between G25 – G80. The larger the number of the grits, the smaller will be the size of the actual particle of blast media.

These smaller particles then create a smaller blast profile on to the product on the other hand the larger particles (the ones that have smaller G numbers) will create a deeper blast profile. In an addition to the depth of the blast profiles the larger particles will show more effectiveness in the removal of heavy amounts of paint while the smaller lot of particles will be best suited for removing contaminants on lighter surfaces. The smaller particles with larger number like G80 grit will leave a 1 to 2 Mil profile and larger particles like a G25 will leave deeper profiles that range between 4 to 6 mils (this finding stands true when, all the other blast equipment settings remain the same).

An additional benefit attached to the steel grit is that it has the potential to be used multiple times before the requirement of replacing the grit arises. One can use mechanical blast media recovery equipment if you want to recover and use the media again. This allows the media to be used approximately 150 to 200 times before it needs to be replaced with a fresh blast media.

What is Steel Shot?

This shot is available in a variety of different sizes but is always designed in a round shape. This is a hard type of abrasive with a mohs scale of about 8.0 that is similar to the hardness of the grit. This shot is used for a vast range of processes where the primary use for its application is referred to as shot peening. Shot peening hahrdens the surface of the product being blasted by repeated striking of the surface with steel shot. These repeated striking makes the metal to compress that increases its strength. Some of the most common applications for this effect known as shot peening are manufacturing of gear parts, springs, turbine blades and cam shafts. Apart from shot peening the other areas of application that involve the use of such shot include which require maximum levels of energy transfer to effectively create a great surface profile. This includes applications such as concrete surface, rubber build up removal, epoxy and adhesive removal.

Just like the grit, these shot offer a lot of uses before the needing replacement mostly allowing about 150 to 200 cycles, depending upon the application one is using these blasting techniques for and assuming that the professional uses the ideal blast media recovery equipment. The sizing of the shots made from steel come in a large variety of sizes that range between s 110 – s 330. In contrast to the grits, here the larger the number of the shot, the larger will be the size of the steel shot, which means a shot of size s 330 will be larger than s 110. The larger shot are used for the removal of thicker coatings and for heavier steel peening too.

Thus to conclude, while selecting a blast media it is extremely important to understand the product you are planning to blast and the ultimate result you want to achieve after the blasting process is done. Based on these factors the decision is made of selecting the blast media as well as the blast equipment for a great execution of the project. If you find yourself confused while selecting the ideal blasting equipment or the media then Quality Spare Centre, a leading trader and exporter of a huge range of metal shots and the associated set of machinery and equipment will be proud to help you as they have been developing expertise in the field since 1990. Also, their efficiency has become a large reason for success in providing competitive services and machinery which makes us trust their word even more.

Source: http://www.shotblasting.org.in/understanding-steel-grit-and-steel-shot.php

The Assembling Process of the Shot Blasting Machine

Shot blasting is a surface finishing technique in which the surface of an object is impacting quickly with a controlled stream of abrasive shot material. Shot blasting is also used to remove burrs, scale, and rust that may affect the integrity, appearance or definition of the part. Shot Blasting may also prepare the surface of a part for coating by removing surface contaminants and provide a surface profile for increased coating adhesion.

Shot blasting differs from shot peening, where compressive stresses are induced on the surface of a part to extend its fatigue life, increase the strength the part strength, or prevent fretting.

Shot Blasting Machine Mainly Consist of Six Basic Parts:

• Blast wheel

• Cabinet

• Elevator

• Work handling mechanism

• Separator

• Dust collector

The Assembling Process of the Shot Blasting Machine:

1. Preparations before Assembling the Shot Blasting Machine

The assemblers should study the following details or carefully clarify the following questions before assembling the shot blasting machine. Study the general assembly drawings, the process files, the technical materials, the structure of the Shot blasting machine, the work piece to be cleaned by the shot blasting machine, the number of blasting wheels, the size of the dust collector, the materials and sizes of the back plate, the functions of the parts of the shot blasting machine, the connection methods and the relationships between the different parts. Prepare all detailed drawings of the parts of the blasting machine. Remove all required parts from the warehouse according to the drawings and prepare all the necessary tools. Perform quality controls on the parts to be assembled and scraped for parts with special requirements.

2. The Assembling Work of the Shot Blasting Machine

The assembly of the shot blasting machine should be done step by step. The complex and separate parts such as the blast wheel, the chamber, the dust collector of the shot blasting machine, the elevator of the shot blasting machine, etc can be assembled first. Assemble all the assembled parts in an entire blasting machine at the end.

Have You Selected An Optimum Shot Blasting Machine Manufacturers?

Shot Blast Technique is widely used in metal-using industries such as construction, automotive, aerospace, shipbuilding etc. Some of the shot blasting applications include surface cleaning, rust removal, thermal scale removal, mold degeneration, paint removal, surface quality improvement in dye, plating or coating.

Shot blasting machines are very useful for cleaning, strengthening or polishing the metal. Therefore, it is very important to choose the best shot blasting machine manufacturers. Only if you have chosen a high-quality machine, you can achieve the required results.

Shot blast technique is an environmentally friendly way to prepare or refurbish large parts of concrete surfaces. It is also a cost-effective way to reduce drying time and provide a surface that is ready to apply coatings or overlays quickly.

This technique is dust free that saves a lot of time and labor. Shot blasting has become a preferred method for coating manufacturers as it helps to produce bonding properties that reduce the possibility of coating failure. It is excellent for removing graffiti, milling, rust, and scale from the surface of the metal.

Types of shot blast method

The most common abrasive used in this technique is sand, also called sandblasting. Garnet, chilled iron, glass beads, and olivine are also blasting machines used for blasting. Garnet and chilled iron, however, are extremely abrasive and coarse and should not be used on a soft surface. Generally, glass beads and olivine are used as polishing agents and can be used on sensitive surfaces such as rubber, glass, and metals.

How does shot blast technique work?

A controlled stream of abrasive shot material is quickly thrown to the target surface. A blast wheel is located in the center of the shot blasting machine, which rotates at high speed and feeds the metal abrasive into the center. From this point, it is accelerated and thrown in the direction of the surface to be prepared. The abrasive as well as the contaminants rebound in a separation system containing a dust collector that removes dust and contaminants that have been pounded.

Shotblasting is more beneficial for surface preparation compares to other conventional Method because harsh chemicals do not need to be used. There is also a wide variety of abrasives to choose from. This process can be done either outdoors or indoors. This method does not cause any form of dust pollution. However, special care must be taken when performing this technique, as dust in the air may cause difficulties in breathing workers. Metal dust can also be harmful to health as toxic substances such as manganese, lead, and cadmium and can be harmful if inhaled.

Hence you should always remember to include trained staff to handle this process. Do not forget to buy only a high-quality shotblasting machine and other industrial equipment.

Things you need to Remember While buying shot blasting Machine

Are you looking to buy a shot blasting machine for your Plant or factory?  Wait a Minute! Let me tell guide you about the best machine & shot blasting machines manufacturer to collaborate in both, power and budget.  Since shot blasting is an excellent method of decreasing, cleaning and polishing metal and uses different types of media to cleanse the surface, it becomes imperative to look for a durable and compact machine that can use most types of blasting media for maximum workability.

However, force does matter in this equipment since the trajectory of media must exert friction against all sorts of dirt and grease to annihilate it from the surface and so enough pressure is required from the nozzle to get a good fine surface. Now have a look on the some of the important points and types of machines come in different categories and sizes.

Important points to note down before buying shot blasting Machine:

There are two known types of shot blasters are air currently available in the market that can be purchased and installed per user requirement.  The one is a wheel blasting machine and the second one is air blasting machine.

1. Wheel blasting machine:

Basically, wheel blasting machine is installed to treat huge machinery parts and industrial applications. Its important feature points are as follows:

● It makes use of turbine wheels rotating at great speeds and high capacity from throwing 60 kg of media per minute and going up to 1200kg/min.

● This system can cover a wide area of equipment that needs huge power consumption to clean and finish the area.

● It propels the abrasive by centrifugal force through the controlled blast pattern in an appropriate   direction.

● Wheel blasting machine has a high flow rate of abrasive therefore it is good in high production. 

● Since the turbines do most work, compressed air requirement is also low and less labor cost.

Hence, it cannot use aluminum oxide or glass beads as shot media but can typically utilize recyclable abrasive, different media like steel or stainless steel shot, cut wire, grit, or similarly sized pellets.

However, this machine is not intended to treat small or delicate parts as its forceful propulsion can dent or puncture thin metals or the area.  In general sense, the compressor power and huge motor rotation don’t fit to cure small objects because of greater abrasive consumption and force.

2.  Air blasting machine:

The second one is an air blasting machine, which uses an air nozzle that ejects pressurized blasting shots from a blasting compartment pushed by compressed air onto the area.  A factory where small parts are treated can utilize this machine because of its handy control and small space consumption. Its important feature points are as follows:

● The air blasting machine has one nozzle from which blast media is suctioned from a blast tank for the operation.

● It is intended for cleaning of small machinery parts, removing chipped surface or rat holes, hidden area cleaning and material processing before painting.

● This is usually a dry application process but some process could employ wet blasting as well.  Dry abrasive blast technique costs less and has low maintenance.

● With it, the rusty materials can be cleaned by vacuum systems to achieve desirable surface remedy at relatively low cost, however, resilient rust content could not be successfully cured by dry abrasive technique.  So, a water-based media might work better as it renders less dust formation.

● It is great for localized peening and handles critical or delicate parts using the right media.  Both aluminum oxide and glass beads can be used to shot blast the intended area.

● In this machine, air compressed blasting is effective in descaling lead paints and water-soluble impurities.

● Water-based abrasive technique drops down dry dust formation in the atmosphere as the water injected immediately behind the nozzle controls the unwanted spread of media in the environment.

● It is useful to remove a high amount of soluble salts.

Apart from it, air blasting units require a lot of compressed air and have a higher labor cost due to less area covered with each blast thrown and so more workforce is required.  Unlike wheel blasting, an air blasting nozzle has a small coverage and blast pattern.  This typically means low production and abrasive flow rates.

Hence, the basic principle is of choice and requirement.  One should know beforehand what type of material he needs to cure at the plant.  Whether it requires high abrasive flow rate or needs less force is another question. Because every machine has the different approach to surface preparation, the type, intended machine life, usage criteria, electricity consumption, industrial requirements and surface preparation are a few questions that one needs to answer by himself.

Meanwhile, we also need to know about the best shot blasting machine manufacturer to get a good quality shot blasting machine and blasting shots or material. As an expert, I can only suggest you go with Quality Spare Center. They are one of the leading shot blasting machine manufacturers in India. To get more information about shots blasting machines & their operation and the technique for surface preparation you can also get a free consultation.

Sand Blasting - Introduction, Parts, Materials Used and Pros & Cons!

Introduction:

Sand blasting is also known as abrasive blasting. It is a process where fine granular sand is applied high pressure against a rough surface keeping in mind the end goal to smooth that surface out. In this process, the abrasive material is pushed, either with a fluid or a gas (ordinarily pressurized air) through a nozzle onto an odd surface. Sand blasting can be applied on wood, dividers, and different surfaces where smoothness is required for paint or different applications. Sandblasting is a quick, powerful, thorough, and safe process It is one of the best ways to prepare an object for high-performance coatings like powder coating.

Types of Sandblasters:

Pressure feed blaster: The media is stored within the pressure pot and then it is sealed. The media goes through the valve and into the compressed air stream, which is placed in the blast nozzle. The nozzle accelerates the media and it impacts the surface of the components.

Suction feed blaster: In suction feed blaster venture siphoning action is used. It draws the blast media into the compressed air stream and then to the nozzle.

Sandblasting parts:

●    Nozzles

●    Blast hose and couplings

●    Air hose and couplings

●    Vacuuming hose

●    Valves

●    Abrasive Traps

●    Regulators, gauges and Filters

●    Control handles

●    Blast Lights and job site lighting

●    Junction Box Assemblies

●    Lids and screens

●    Remote Control Kits

●    Blast Suits and Gloves

●    Cabinet components

●    Cabinet Gloves

●    Filters, Filter Bags, cartridges

●    Fittings

Materials Used for sandblasting:

Following Materials are used in sandblasting process-

●    Sand

●    Copper Slag

●    Steel grit

●    Powder abrasives

●    Small pieces of walnuts

●    Pieces of avocado shells

Pros and Cons of sandblasting:

The pros (advantages) of sandblasting are:

●Quick removal of impurity: This process helps in quick removal the contaminants on different surfaces.

● Abrasive action: The materials which are used in the step are highly abrasive and have an aggressive action on the surfaces.

● Fit for tough/rough surfaces: The powerful action of the process can remove deposits even from tough surfaces like concrete.

● Less machinery involved: This process does not make use of complex machineries.

The Cons (disadvantage) of sandblasting are:  

● Abrasives: The abrasive used in the process is very rough and if used regularly for a particular surface, then it will wear away the surface.

●      Use of silica: In most of the country, sand is used as abrasive in the process which is banned because of different health hazards.

●  Requires precautions: A lot of precautionary steps have to be taken in order to prevent different types of hazards like you have to cover all parts of the body that are exposed to the process. Covering up of body parts will prevent the abrasives to enter into the body.

● Not suitable for smooth surfaces: Mobile sandblasting is usually not suitable for cleaning smooth surfaces because of the abrasives used. Rather you can make use of soda blasting which employs the similar procedure but makes use of sodium bicarbonate.

● Heat generation: The process of sandblasting includes projection of particles with high velocity, so when these materials hit the surface, a lot of heat is generated which can harm the surface.

However, through this process, one can easily remove the contaminants on different surfaces and have an aggressive action on the surfaces. This process can also easily remove tough surfaces like concrete. Therefore this machine and process have their own independent use for different type of the surface preparation.