SAND BLASTING PRINCIPLE AND APPLICATION

- May 07, 2018 -

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THE PRINCIPLE OF SANDBLASTING

Sandblasting is a method of using a motor compressed air to accelerate sand or iron powder to a high speed to process a product. It is categorized into

"DYNAMIC IMPELLER BLASTING" ING”,

“AIR BLASTING”,

“SHOT PEENING”.


Use air to move lighter density materials or use power blades to drive heavier materials, hit the object to make the surface produce the desired floral surface, or remove dirt oxides, or eliminate surface Remaining stress

Sandblasting materials are generally steel ball, stainless steel, alumina(Brown Fused Alumina,White Alumina, Black Alumina), lead-based, copper, iron sand, aluminum alloy, carbonized aluminum, iron beads, glass beads, resin, sand, other ceramics. Calcium Carbonate, Sodium Bicarbonate (Cao) Baking Soda, Hard nut Fragments, etc.

The particle size are different. The effect of is different, too. 

The sand blasting method using the power of the motor is called "DYNAMIC IMPELLER BLASTING",

Use compressed air blasting method called "AIR BLASTING".

Sandblasting is also used as a method of sand blasting by mixing blasting materials into liquids. It is called “WET SAND BLASTING”. But it not the usual way.

In the following, only dry sandblasting that, "DYNAMIC IMPELLER BLASTING" and "AIR BLASTING" are explained.

"DYNAMIC IMPELLER BLASTING" is an industrial metal pretreatment process.

The difference between "DYNAMIC IMPELLER BLASTING" and "AIR BLASTING" is that the kinetic energy of the jet grit is different, the kinetic energy of "AIR BLASTING" is compressed air, and the kinetic energy of "DYNAMIC IMPELLER BLASTING" is a motor-driven rotary power blade.

"DYNAMIC IMPELLER BLASTING" can spray more blasting material with less power.

"DYNAMIC IMPELLER BLASTING" Compared to "AIR BLASTING", blasting materials can be sprayed 50 to 100 times per minute (depending on conditions, there will be a slight difference). However, “DYNAMIC IMPELLER BLASTING” does not have the above-mentioned good efficiency when jetting abrasive particles with a light specific gravity.


When the blasting material with a light specific gravity is sprayed with a power blade, it is decelerated by air resistance before reaching the product. And when using a power blade for sandblasting, the sand will strike the power blade and cause damage. If the price of sand is relatively high, there is a problem of production cost, and when alumina-based sand is used, the grinding of the blade becomes serious.

 

The criterion for the selection of "DYNAMIC IMPELLER BLASTING" and "AIR BLASTING" is

1. When using fine-grained, light blasting materials, and

2. Use the vacuum spray washer when spraying narrow areas.

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SANDBLASTING USE, FUNCTION, PURPOSE:

 

1. Removes burrs, feathers, foreign matter, rust, scale after heat, scales, sand from castings, scales and flux after welding.

The burrs and burrs produced by the cutting tools can be removed by the impact force of the sand particles or by the cutting force of the sand particles. The principle is to remove burrs and burrs without damaging the workpiece. In this case, start by selecting the type of grit that does not harm the workpiece, starting from the soft grit. When plastic cannot be removed, glass beads are used to change in this order.

    The surface of the product will become rough when using glass beads. Please note.

     Rust, scale after heat, and scale blasting, the “DYNAMIC IMPELLER BLASTING” method is efficient.

 

2. Surface cleaning, painting, steaming, gold plating, plating film peeling.

 

   The work done for the purpose of surface beautification and peeling must have the necessary degree of impact on the selection of sand. Use large particles as much as possible without harming the product. Relatively light dirt or coating film can be easily handled.

   Stubborn dirt or coating film will be used to lead lead, copper. When this sand grain cannot be removed, sand blasting after heat treatment is also used. (Dry-cast coating film-denaturing sandblasting method) Steamed material, gold-plated, and peeled electroplated film are also peeled off like stain or paint.

 

3. BRUSH , before gold plating, before welding, before coating, then before treatment, eliminates flaws, eliminates rough surface, and etch processing

 

   BRUSH is to increase the surface roughness and enhance the adhesion of coating and gold plating. There is also the added value of giving the product with a rough surface, which also has the effect of eliminating scars. Stainless steel is treated with glass sand. However, it is not only to eliminate scars, but also to create a glossy flower face.

 

4.SHOT PEENING

 

  High-speed sand impact to improve the surface hardness. It is a kind of cold forging process. When compressing the workpiece to be processed, it can increase the stress and prolong the fatigue life of the metal. In addition, there is also an effect of improving thermal conductivity or lubricity.

 

5. Handicrafts, design, seal tooth technicians, etc.

 

Use sandblasting to engrave text in glass, stone, plastic, etc.

 

6. semiconductor,

  Sand blasting with micro powder. Semiconductors, especially ceramics, copper circuit boards, germanium wafers, etc., require highly accurate sandblasting



Located in Luoyang, Yannuo as a direct producer and trader, mainly focuses on researching, developing, producing and supplying of corundum abrasives for more that 20 years. We have advanced technology, abundant experience and professional teams in smelting, sieving and producing. Now we are equipped with 3 smelting machine, 5 deep processing lines and 150 employees. Our own chemical and physical index analysis laboratory test ensure our products to meet clients international standard and customized request. Main products include Brown Fused Alumina, White Fused Alumina, black fused alumina, Silicon Carbide and Calcined Corundum for industries in coated & bonded abrasives, refractory foundries, polishing and sandblasting and many more. We are available to produce according China GB, America ANSI, Japan JIS, Europe FEPA and International ISO standard. The grain we supply usually with stable chemical content, fine particle distribution, high purity, little dust and magnetic contents. We mainly export to more than 10 countries and regions including Japan, South Korea, US, Germany, Russia and Taiwan etc. Our annual output has reached over 40,000 tons. Since our company established, we have our sales rapidly increased in the products of corundum and refractory material. With the expanding of new markets, our company meets more developing opportunities. Currently, we have cooperated with many clients in the industries of textile, electron, clothing and machinery which have made high praise to us.