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about sandblasting

  • Q matter or sandblasting stainless steel cutlery is same ?

    Is it the same for matte or sandblasting stainless steel cutlery?
    Is it the same level of process?
    The two methods of treating the stainless steel surface are different.
    The matt treatment method uses a matt liquid to complete the matt
    electrolysis process. Sandblasting is the use of compressed air to
    spray the abrasive toward the surface of the workpiece at a high speed.
    The purpose is to improve the surface appearance quality by removing
    the oxide layer, rust, etc. on the surface.
  • Q why Sanded-marks appear after sandblasting?

    A sanded-mark

    It is very likely that the choice of abrasive hardness is too high,
    or the size is too large, or the sandblasting pressure is too large
  • Q will the workpiece will become thicker after blasting?

    Many users will worry about the thickness after the sandblasting ,in fact it is no need to worry 
    Sand blasting will remove the oxide layer on the surface; sandblasting abrasive  will not
    be attached to the surface of the workpiece, and the workpiece will not be thickened.
  • Q Why the blasting machine does not blast abrasives?

    If you have problems of the sandblaster blasting abrasives, there are factors and solutions will give you some knowledge
    1. Run out of the abrasive. Turn off the air and refill the blasting abrasive.
    2. The blast gun gets block. Turn off the air and remove the nozzle to check whether there is blockages.
    3. Check whether the blasting meida is dry, because wet abrasive will cause accumulation. If wet abrasive cause this problwm, clean the gun and nozzle, discharge the abrasive, dry and seive it for resuing.
    4. The compressed air with moisture enters into the machine not only causing wet abrasives but making the blasting hose damp and stick with medias. To avoid such conditions, equipping a dryer may be better.
    5. Without sieve causing bigger dust and ununiform abrasive entering the media valve,
    6. Filling too much blasting abrasive. Over-load of abrasive will cause unpressurized.
  • Q What is stone blasting?

       Stone surface blasting is using sharpe-edged abrasives such as quartz, silicon carbide, river sand, steel grit, driven by compressed air to impact the stones resulting in a required decorated surface, also ideal and perfect for etching letters and patterns. We provide stone blasting machine to meet customer's demands.
       Stone blasting application is of a wide range, not only finish natural stone plate in stadard specifications, but also prepare lines, pillars, handrail, steps, corners and other irregular stones. Same as other methods of treatment, stone blasting supports both small and large area processing.
  • Q What is a sand blasting machine work for? ( Applications)

    Sand blasting machine offers a wide application for all kinds of products and materials:
    1. Pretreatment: process before electroplating, painting, powder coating and other covering process with absolutely clean surface, meanwhile greatly improves the coating adhesion and corrosion resistance.
    2. Cleaning: remove oxides, dirts, impurities from castings, stampings, welding parts, heat treatment parts or other metals, clean surface of non-metal parts, clear spots of ceramic products, restore patterns.
    3. Refurbishment: refurbish accessories of carts, motocycles, mechanical and electrical equipment, as well as eliminate fatigue stress, to extend the life.
    4. Polishing: remove masks of all metal or non-metal surface, plastic, crystal, glass, matt process making upscale effect.
    5. Moldings processing: matt and mist finishing of mold surface, graphic and text production, no harm to surface and ensure and accuracy.
    6. Deburring: remove burrs of machinery parts and plastic injection parts.
    7. Rework of defective products: remove unqualified coatings, colours and letterings.
    8. Strengthenning: increase the hardness and eliminate the internal stress of metal parts, such as aircraft blades, springs, machining tools, weapons, etc.
    9. Etching and anti-skid: etch patterns, text and antiskid for metal and non-metallic products, such as: marble, non-slip handle, seal, stone tablet.
    10. Jeans decorating: achieve the decoration of scrub, bleaching, whiskeys on jeans.
  • Q Why choose a sand blasting machine? (the advantages)

    1. The surface of parts will not be polluted by sandblasting process, parts and media will not cause chemical reactions.
    2. Irregular shaped workpieces, hard-to-reach corners can be easily blasted by the machine while its difficult for manpower.
    3. Sandblasting machine greatly improve the surface finishing productivity and quality, such as removing heavy rust and scales.
    4. One blast cabinet can use various blasting medias: glass beads, white & brown corundum, steel ball, garnet, plastic abrasive, etc.
    5.The media blasting machine allows all kinds of finishing process, such as refurbish vehicle parts, removing rust from metal, cleaning contaminants of parts, etc.
  • Q Pressure Blast Cabinet VS Siphon Blast Cabinet

    1)Working Principle:
    Siphon Type - With the compressed air flowing in the blasting gun, the siphon action will create a negative-pressurized environment that sucks the abrasive and delivers to the blast gun nozzle, which attains the purpose of abrasive blasting on the parts' surface. For the Suction blast cabinet, the compressed air is the power source of both abrasive supply and speed accelerate.
    Pressure Type - The direct pressure cabinet is specially designed with a pressurized vessel containing compressed air, which will (pneumatically)push the media to the nozzles through a media outlet valve, then blast them onto the target. The compressed air is the power source of both abrasive supply and speed accelerate.
    2)Different Features:
    Siphon Type
    A: Suitable for light blasting job and general-purpose finishing
    B: The abrasive delivery is much slower than pressure blaster
    C: Achieve abrasive travel continuously through the machine.
    Pressure Type
    A: Perfect for removing heavy coatings and conteminants
    B: The air push the abrasive 40% faster than siphon type, greatly increase the productivity.
    C: The pressure vessel needs to re-pressurize and cannot work continuously.
  • Q Sandblasting Equipment Category:

    A 1. Manual sandblasting machine: manual dry sandblasting machine, wet sandblasting machine, mobile sandblasting machine, open sandblasting machine;
    2. Automatic sandblasting machine: rotary automatic sandblasting machine, drum automatic sandblasting machine, belt conveyor automatic sandblasting machine, flat belt conveyor sandblasting machine;
    3. Burr machine: rough edge machine, crawler burr machine, double gun drum burr machine;
    4. Shot blasting machine: hook type shot blasting machine, crawler shot blasting machine, hanging shot blasting machine;
    5. Abrasive: white corundum, alumina sand, corundum, glass beads, glass sand, emery, silicon carbide, stainless steel balls, nylon sand and other sand;
    6. Accessories: sandblasting gun, blasting nozzle, sandblasting gloves, sand tube, high pressure trachea, foot switch, sandblast clothing, sand pump.
  • Q Troubles and solutions of using the sandblasting machine

    Trouble Cause Solution
    Good adrasives come into the dust collector 1. Big opening of the new dust collector
    2. Too thin abrasive
    1. Shrink the opening after using 8 hours
    2. Use thick abrasives.
    Leakage of abrasive The dust collector has holes or is not clipped tightly. Changing the dust collector or clip tightly
    Not clear view when sandblasting 1. the dust collector blocking
    2. Old dust collector and blocking
    3. The recycling pipe blocking
    4. The nozzle of the air pipe is  too big
    5. The air pressure is too high
    1. Vibrate the dust collector
    2. Change the dust collector
    3. Tear down the recycling the pipe, check the cause
    4. The diameter not more than 5.6mm
    5. Adjusted as recommended.

  • Q How to choose right sandblasting equipment?

    A Please provide below information to your sanbladting equipment supplier before buying:
    1. The maximum size(L*W*H) of your products for finishing, and the shape (It's better to show the actual photos)
    2.  Please advise if you need manual or automatic sandblasting equipment
    3. Your required daily output of the finishied work pieces.
    4. Any special requiirements please note.
    We will recommend you appropriate models based on above points.
  • Q Where can i buy sand for sandblasting?

    A We, Kafan, supply full kinds of abrasives and blasting media such as glass bead, ceramic sand, blask corundum, brown corundum, plastic grit, black carborundom, white corundum, stell ball, metallic grit, stainless ball, stainless steel shot, aluminum shot, etc.
  • Q What is the difference between dry sandblasting and wet sandblasting?

    A 1. Wet sandblasting use water and sand as abrasive, while dry sandblasting only use sand without water.
    2. Wet sandblasting is more environmental-friendly, does not cause pollution
    3. Wet sandblasting makes the workpiece surface more delicate.
    4. But wet sandblasting does not suitable for workpiece which are easy to get rust.
    5. The spray gun for the wet sand blasting machine is different with the dry spray gun. 

  • Q How to select a sand blasting machine?

    1. Depending on the size of the workpiece, to choose cabinet sand blasting machine, movable sand blasting machine, or automatic sandblasting machine;
    2. Depending on the shape of the product, select  the sandblasting machine with different specifications, generally, there will be standard model for product less than 1m. Customized model or open model for specially large product.
    3. Customers' requirement on the surface of the product. If it is dry blasting, there are many choices of abrasives, if wet blasting, usually choose glass sand.
    4. Some quick wearing accessories have to be familiar with, sandblasting gun and sandblasting gloves are frequently to be changed. 
  • Q Shot blasting VS blasting

    A Shot blasting is the use of high-speed rotating impeller to throw small steel balls or small iron shot high-speed impact parts surface, it can remove parts of the oxide layer. At the same time, steel balls or iron shots collide with the surface of the part at high speed, resulting in the distortion of the lattice surface of the part and increasing the hardness of the surface, which is a method of cleaning the surface of the part. Shot blasting is often used to clean the surface of the casting or strengthen the surface of the part deal with.
    General shot blasting used for regular shapes, etc., a few throw around with up and down, high efficiency, small pollution. Shipbuilding, shot blasting, sand blasting are commonly used. However, whether it is shot blasting or sand blasting, compressed air is used. Of course, not the use of high-speed rotating impeller can not be shot. In the repair, the shipbuilding industry in general, shot blasting (small shot) and more used in steel pretreatment (rust before painting); sandblasting (repair, shipbuilding industry is used ore) used in the molding of the ship or sub-section, The role is to remove the old paint and rust on the steel, re-coating. In repair, shipbuilding, shot blasting, sandblasting the main role is to increase the adhesion of steel coating paint.

    Shot blasting is driven by a motor impeller body rotation, by the role of centrifugal force, the diameter of 0.2 to 3.0 balls (cast pill \ cut pill \ stainless steel balls, etc.) thrown to the surface of the workpiece, the workpiece surface to achieve a certain rough Degree, so that the workpiece becomes beautiful, or change the workpiece tensile stress welding stress, improve the life of the workpiece. Almost used in most areas of machinery, building ship \ auto parts \ aircraft parts \ gun tank surface \ bridge \ Steel \ glass \ steel \ pipe \ etc. Sandblasting (shot) is the use of compressed air as a power to the diameter of 40 to 120 mesh sand or 0.1 to about 2.0 shots to the surface of the workpiece, so that the workpiece to achieve the same Effect.Pill the different sizes, to achieve the treatment effect is not the same.The key points: Shot peening can also play an enhanced role.Now the domestic equipment into a misunderstanding, that only the shot blasting can achieve the purpose of strengthening the United States \ Japanese companies are used to strengthen the shot peening and use! Each has its own advantages .For example, such as gears such as the workpiece, shot pill shot angle can not be changed, only to change the initial speed frequency .But it deal with the amount Large, fast, and shot peening is just in phase The effect of blasting on a good shot no effect. Sandblasting is the use of compressed air to high-speed blowing of quartz sand to clean the surface of a part of the method.
    The factory is also called blowing sand, not only to rust, but also along the degreasing, the coating is very useful. Commonly used in parts surface rust; parts surface modification (the market is small wet sandblasting machine is for this purpose, the sand is usually corundum, the medium is water); In the steel structure, the application of high strength bolts is a more advanced connection Method, because the high-strength connection is to use the friction between the bonding surface to force, so the quality of the bonding surface is very high, then the surface must be sandblasting treatment.
    Sandblasting for complex shapes, easy to use manual rust, low efficiency, the scene of the environment is not good, rust uneven. General sandblasting machine has a variety of sandblasting gun, as long as not particularly small box, can put the gun into play clean. Pressure vessels supporting products - Sealing Head blasting the workpiece surface oxide scale, the diameter of quartz sand 1.5mm ~ 3.5mm.
    There is a processing is the use of water as a carrier, driven by emery to process parts, is a kind of sandblasting.
    Blasting and sandblasting can play a cleansing and decontamination of the workpiece purpose, the purpose for the preparation of the next sequence, that is, to ensure the next procedure roughness requirements, and some in order to the surface consistency, the shot on the workpiece Strengthen the role of sandblasting is not obvious. Shot for the general small ball, sand blasting quartz sand. According to different requirements, sub-headings.
    Casting almost every day with sandblasting, shot blasting


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