The role of sandblasting, why sandblasting, and the application areas of sandblasting

1. Pretreatment: Electroplating, painting, spraying and other sandblasting treatment before covering, the surface is absolutely clean, and the adhesion and anti-corrosion ability of the covering layer are greatly improved. 2. Cleanup:

Removal of scale, residue and dirt from metal workpieces such as castings, stamping parts, welded parts, and heat-treated parts; Surface cleaning of non-metallic products, removal of black spots on the surface of ceramic embryos and restoration of lacquer patterns, etc. 3. Refurbishment of old parts: refurbishment and cleaning of all moving parts such as automobiles, motorcycles, mechanical and electrical equipment, etc.

At the same time, it eliminates fatigue stress and prolongs service life. 4. Finishing: All metal products and non-metal products (plastic, crystal, glass, etc.) surface traces are eliminated, and matte matte surface treatment is used to improve the surface of the product.

Fifth, mold treatment: argon surface surface argon matte treatment, production, and mold cleaning, do not hurt the mold table...

Pre-treatment processing:

Electroplating, painting, Teflon, PC, rubber and plastic coating, metal spray welding, titanium plating, etc.

Surface beautification processing:

Decorative processing of various metal products and matting and soft matte treatment of electroplating products and non-metallic products. Such as: acrylic, Rose, glass, crystal glass and other surface atomization treatment.

Surface beautification processing:

Decorative processing of various metal products and matting and soft matte treatment of electroplating products and non-metallic products. Such as: acrylic, Rose, glass, crystal glass and other surface atomization treatment.

Surface Cleaning Processing:

Metal oxide layer or black skin after heat treatment, surface pores, metal or non-metal surface rust elimination, ceramic surface black spots and coloring removal or painting regeneration, rubber mold and gravity die casting mold oxide, residue or separation agent removal.

Hair removal processing:

Removal of hairs from plastics, bakelite products, zinc and aluminum die-castings, etc., and surface finishing of electronic or other parts.

Electronic parts processing:

Removal of surface impurities after diffusion of silicon chips, etching operations of sandblasting and cutting silicon chips into small round grains, spraying of spilled rubber burrs in the packaging industry of electronic parts, removal of surface printing of finished electronic parts, cleaning and etching of ceramic electric heating materials: surface modification and etching treatment of precious metal jewelry, gemstones, glass, stone, stone seals, ceramics, wood, etc.

Workpiece stress relief machining:

Parts cleaning and stress relief of aerospace industry parts or refurbishment and matting and derusting and paint removal mold processing of national defense **: ploughing processing (sandblasting) on the surface of the mold, mold biting and fogging treatment, increasing the adhesion of the mold covered with PU, cleaning and matte treatment of shoe molds, conductive rubber molds, tire molds and electronic product molds.

The function of sandblasting is to make the surface of the workpiece obtain a certain cleanliness and different roughness, so that the mechanical properties of the surface of the workpiece are improved, the fatigue resistance of the workpiece is improved, the adhesion between it and the coating is increased, the durability of the coating film is prolonged, and it is also conducive to the leveling and decoration of the coating.

The process of cleaning and roughening the surface of a substrate using the impact of a high-velocity sand flow. Compressed air is used as the power to form a high-speed jet beam to spray the sprayed material (copper ore, quartz sand, emery, iron sand, Hainan sand) to the surface of the workpiece to be treated at high speed, so that the appearance or shape of the outer surface of the workpiece surface changes.

Hello pro Advantages and disadvantages of sandblasting process Answer: Messy slag like ceramic sandblasting 1, ceramic sand sandblasting process has high hardness and good rust removal effect. 2. Sandblasting treatment is a more thorough, more versatile, faster and more efficient cleaning method. Lack of uproar point, so the smoothness is low, and it is easier to attach dust and other dirt Like sandblasting equipment in operation, noise pollution will be generated, damage people's hearing system, and cause people to have tinnitus, dizziness and other symptoms The sandblasting process is to use compressed air power to spray sandblasting abrasives, ceramic sand, iron sand, etc. on the surface of the metal that needs to be treated, so that the metal surface beam search surface will undergo certain changes.

Sandblasting: It is a method of using compressed air to blow out quartz sand at high speed to clean the surface of parts.

It is also called sand blowing in the factory, which not only removes rust, but also degreases early cracking by the way, which is very useful for painting. Scrambled.

Uses: It is often used for rust removal on the surface of parts and modification of the surface of parts. In the steel structure, the application of high-strength bolts for connection is a relatively advanced method, because the high-strength connection is the use of friction between the joint surface to transmit force, so the quality of the joint surface is very high, then the joint surface must be treated with sandblasting.

Sandblasting is used for complex shapes, easy to remove rust by hand, low efficiency, poor on-site environment, and uneven rust removal.

Abrasive blasting work range:

1. Workpiece coating and sandblasting before workpiece bonding can remove all dirt such as rust on the surface of the workpiece, and establish a very important basic schema on the surface of the workpiece, and can achieve different degrees of roughness by replacing the abrasives of different particle sizes, such as the abrasives of the flying abrasives, which greatly improves the adhesion between the workpiece and the coating and plating. Or take a waiter to make the adhesive bond stronger and better quality.

2. The cleaning and polishing sandblasting of the rough surface of the parts and the workpiece after heat treatment can clean all the dirt on the surface of the casting and heat treatment workpiece, and polish the surface of the workpiece to improve the finish of the workpiece, so that the workpiece can expose a uniform and consistent metal color, so that the appearance of the workpiece is more beautiful and good-looking.

3. The burr cleaning of the machined parts can clean the micro burrs on the surface of the workpiece, make the surface of the workpiece smoother, eliminate the hazards of burrs, and improve the grade of the workpiece. And sandblasting can make a small fillet at the junction of the surface of the workpiece, making the workpiece appear more beautiful and more precise.

4. Improve the mechanical properties of parts, after sandblasting, mechanical parts can produce uniform and fine concave and convex surfaces on the surface of parts, so that the lubricating oil can be stored, so that the lubrication conditions can be improved, and the noise can be reduced and the service life of the machinery can be improved.

5. For some special-purpose workpieces, sandblasting can achieve different reflections or matte at will. Such as the polishing of stainless steel workpieces and plastics, the polishing of jade, the pattern of the surface of wooden furniture, the surface of frosted glass, and the texturing of the surface of cloth.

Analysis of the principle of sandblasting:

Sandblasting is the process of cleaning and roughening the surface of a substrate using the impact of a high-velocity sand flow.

Sandblasting uses compressed air as the power to form a high-speed jet beam to spray the spraying material to the surface of the workpiece to be treated at high speed, so that the appearance or shape of the outer surface of the workpiece surface changes, due to the impact and cutting effect of the abrasive on the surface of the workpiece, the surface of the workpiece obtains a certain cleanliness and different roughness, so that the mechanical properties of the workpiece surface are improved, so the fatigue resistance of the workpiece is improved, the adhesion between it and the coating is increased, the durability of the coating film is prolonged, and it is also conducive to the leveling and decoration of the coating. <>

The function of sandblasting is to make the surface of the workpiece obtain a certain cleanliness and different roughness, so that the mechanical properties of the surface of the workpiece are improved, the fatigue resistance of the workpiece is improved, the adhesion between it and the coating is increased, the durability of the coating film is prolonged, and it is also conducive to the leveling and decoration of the coating.

The process of sandblasting can remove rust, and there is no need to polish and remove rust before sandblasting.

Sandblasting (refers to the removal of rust on the metal surface or plating on the metal surface) with quartz sand, ordinary quartz sand, refined quartz sand: high hardness, good rust removal effect. The pre-treatment of the sandblasting process is bad, which affects the adhesion of the coating, the appearance, the moisture resistance and corrosion resistance of the coating.

If the pre-treatment work is not done well, the rust will continue to spread under the coating, causing the coating to fall off in pieces.

The life of the carefully cleaned surface and the generally simple cleaned workpiece can be compared with the coating by the exposure method, and the difference in life can be 4-5 times. There are many methods of surface cleaning, but the most commonly accepted ones are: solvent cleaning, pickling, hand tools, power tools.

There are two types of sandblasting: dry sandblasting and wet sandblasting. The surface of sandblasting is rougher, and the application of wet sandblasting is similar to that of dry sandblasting, but it is mainly used for more precise processing. The advantage of wet sandblasting is that it has less pollution.

1.Dry blasting.

Dry sandblasting is divided into two types: mechanical sandblasting and air pressure blasting. Each type can be divided into manual, semi-automatic or continuous automatic and other methods. The sandblasting machines used are self-flowing, centrifugal, suction and pressure.

The commonly used in production are inhalation type and pressure type. Suction devices are simple, but inefficient, and are suitable for small parts. The pressure type is mainly used for mass production of large and medium-sized parts, with wide applicability and high efficiency.

The manual air pressure sandblasting chamber is widely used in China, which is suitable for various small and medium-sized parts with complex shapes.

The commonly used sand materials for dry sandblasting are alumina sand (including natural and man-made), quartz sand (silicon dioxide), silicon carbide (artificial corundum), etc. It is best to use bauxite (alumina sand). Because it is not easy to chalize, the working conditions are good, and the sand can also be recycled.

Although silicon carbide sand also has the above advantages, it is rarely used because it is too expensive. The most widely used in China is quartz sand. Although it is easy to pulverize, it has the advantage of not contaminating the parts.

2.Wet sandblastingIt is to add a certain amount of water to the sand to make it a sand-water mixture, so as to reduce the impact of the sand on the surface of the part, thereby reducing the removal of the metal material and making the surface of the part smoother.

Double-walled sheet metal weldments are not suitable for wet sandblasting because they are difficult to prevent corrosion. For thin cross-section parts, because the working pressure of wet sandblasting is greater than that of dry sandblasting, the impact of water is easy to deform it, so it is not suitable to use wet sandblasting.

3.SandblastingTreatment of post-parts Sandblasted parts should be touched to the minimum and surface treatment should be carried out in a timely manner.

Some parts do not allow sandblasting in special parts and must be properly protected. For example: curved teeth, internal and external spiral teeth, splines, large internal and external threads; differentiating markers; Precision dimensions; light surfaces, etc.

These non-blasted surfaces can be protected with mechanical clamps, tapes, paper tapes, rubber plugs, etc.

Sandblasting is powered by compressed air to form a high-speed jet beam to spray materials (shot peening glass beads, steel shots, steel grit, quartz sand, emery, iron sand, sea sand.

High-speed spraying to the surface of the workpiece to be treated, so that the mechanical properties of the outer surface of the workpiece surface change, due to the impact and cutting effect of the abrasive on the surface of the workpiece, the surface of the workpiece obtains a certain cleanliness and different roughness, so that the mechanical properties of the workpiece surface are improved, so that the fatigue resistance of the workpiece is improved, the adhesion between it and the coating is increased, the durability of the coating film is prolonged, and it is also conducive to the leveling and decoration of the coating, and the impurities, variegation and oxide layer on the surface are removed. At the same time, the surface of the medium is roughened, the residual stress on the surface of the substrate and the hardness of the surface of the substrate is improved.

Uses of sandblasting:

1.Cleaning of the surface of the workpiece.

Oxide scale, residual salt, residual oil, etc. after heat treatment; oxide scale, molding sand, etc. of black (have) color castings; Oxide scale, molding sand, etc. of precision castings are processed without margin; residues, microburrs, etc. of machined parts; oxide scale, welding slag, etc. of weldments; oxide scale, rust layer, etc. of cold and hot-rolled steel plates (section steel); Release agents, deposits, etc. for various mold cavities; sintering residues on the surface of ceramic elements; flash of plastic molded parts; radioactive elements on the surface of objects; bridges, hydropower station gates, ships, buildings; rubber adhesion layer for airport runways; Railroad car; various pipes and containers; oil stains and attachments of old parts; residual paint, rust layer and attachment of containers, etc.; Wrong sintered layers on porcelain; Scratches on decorative surfaces.

2.Pre-treatment of the surface of the workpiece before coating.

4.Finishing of the surface of the workpiece.

It is also called sand blowing in the factory, which not only removes rust, but also degreases by the way, which is very useful for painting.

Sandblasting, one, descaling, rusting. Second, a certain rough surface is formed on the surface of the workpiece.

In short, sandblasting is a pre-treatment process, which is convenient for later surface coating and improves the anti-corrosion level.

Sandblasting is powered by compressed air to form a high-speed jet beam to spray the sprayed material (copper ore, quartz sand, emery, iron sand, sea sand) to the surface of the workpiece to be treated at high speed, so that the appearance or shape of the surface of the workpiece changes. Due to the impact and cutting effect of the abrasive on the surface of the workpiece, the surface of the workpiece obtains a certain cleanliness and different roughness, so that the mechanical properties of the surface of the workpiece are improved, so the fatigue resistance of the workpiece is improved, the adhesion between it and the coating is increased, the durability of the coating film is prolonged, and it is also conducive to the leveling and decoration of the coating.

Reply 5 According to what you said, it should mean that the sandblasting has already covered the sanding, and if sandblasting is carried out, there is no need for sandblasting. So what you said about sandblasting first and then sanding, isn't the surface roughness back again? View the original post

Salute to the comrades who are on the front line of sandblasting, it's really hard!! Looking forward to the shipyard to improve the treatment of sandblasters!! View the original post

Sandblasting is to clean and roughen the surface of the workpiece to improve the surface quality of the product.

Reply 6 It is commonly referred to as jetting in textbooks. If the abrasive is sandy, it is called sandblasting; If the abrasive is pellet-like, it is called shot peening. Sand washing is a figurative statement.

Spraying and flushing are quite similar in terms of behavioral characteristics, but different regions have different words and habits, you can call it sandblasting or sandblasting. Probably in the north, sandblasting is a little more acceptable. View the original post