Sand blasting
Date: 2024-10-27 Categories: Blog Views: 407
喷砂是aluminum产品制造和数控加工生产中常见的表面处理方法。在本文中，我将详细介绍喷砂过程的原理、应用方法、优缺点。
What is sandblasting?
Sandblasting is a compressed air-powered surface treatment technology that forms a high-speed jet beam to blast (e.g., sand, pearl salts, sodium bicarbonate, glycine powder, silver, etc.) at high speeds onto the surface of the workpiece or object to be treated. The beaded medium is guided to the surface of the material. The target surface is smooth, clean and shiny by friction reaction.
Sandblasting is a traditional and time-consuming process for large and complex materials with different shapes. As a result, the concept of sandblasting was patented and introduced in the United States in 1870. The concept of sandblasting comes from the natural phenomenon of sand erosion caused by dust in desert areas.
What is sandblasting used for?
Shot peening is a widely used treatment process. It plays many roles in the production and manufacture of metal products, removing oxidized skin, rust, dirt, scratches and other undesirable substances or defects. It makes the metal products have a better appearance and meet the needs of customers.
When to choose sandblastingappliance
Sandblasting is used in the following cases:
- 1. CNC machining milling cutter and other tools in the processing surface to produce scratches, scratches, swirl scratches, need to remove the product appearance uniform .
- 2. CNC machined surface products with small burrs, eliminating edge bumps, preventing scratches to the hand, safer to use.
- 3.CNC machining, aluminum alloy casting surface produces oil, sandblasting to remove oil, make the surface more consistent and beautiful.
- 4. Aluminum alloy casting requires additional surface treatment such as plastic spraying, plating, painting, etc. to facilitate adhesion and remove the interference of surface magazines.
- 5. By using different sizes of sand blasting, the roughness of the product surface is changed to produce different uniform roughness on the product surface to meet the requirements of use (e.g. anti-slip).
- 6. Remove residues or unwanted coatings from the surface of the product without damaging the material.
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How the sandblasting process works
Compressed air is used as the power source for the sandblasting process. The sandblasting abrasive is sprayed at high speed onto the surface of the workpiece to be treated by the high-speed jet beam formed by the compressed air. The high-speed jet abrasive has a strong impact on the surface of the workpiece and can remove dirt, rust, coatings and other attachments on the surface of the workpiece. While polishing the surface material, the abrasive cuts the surface of the workpiece, thus removing material and roughening the surface. To obtain different degrees of roughness, the grain size of the abrasive and the jetting speed can be adjusted as needed.
Tools for sandblasting
Blasting Cabinet
Sand blasting machine is the core equipment of sand blasting treatment, which is used in sand blasting places. In order to ensure the smooth running of the sandblasting process and protect the safety of the operators, it must be manufactured with top material technology.
The common sandblasting cabinet is welded with strong, high thickness steel, which effectively blocks the flight of abrasives during the sandblasting process. Strong support legs stabilize the blast cabinet so that it does not shake during operation.
sandblast abrasive
Sandblasting abrasives are one of the decisive roles in sandblasting treatment through the selection of different materials such as steel shot, quartz sand, aluminum shot, glass and plastic. (Quartz sand glass abrasive can make the surface finer and produce a matte effect, steel balls have a stronger surface treatment ability, aluminum oxide has a whitening effect, and plastic media is less strong and can provide a higher precision) Different sizes are available. (Strong sandblasting treatment effect with large particles and rough surface, poor sandblasting effect with small particles and smooth surface.)
guns
The sand blasting gun is the key component of the sand blasting machine. Without sand blasting cabinet, without sand blasting environment and without sand blasting gun, sand blasting is not possible. Depending on the method of use and the type of abrasive, there are various models to choose from. Hand-held (easy to operate and more accurate), foot pedal room remote operation (easier), and other types.
Sandblasting Gloves
Sandblasting gloves are hand protection specifically designed for sandblasting operations. When using a hand-held sandblasting gun, the sandblast splashes can damage people's hands. At this time, wearing safe and comfortable sandblasting gloves can effectively avoid sandblasting damage, and comfortable gloves can allow you to accurately control the sandblasting gun.
Advantages and disadvantages of sandblasting
Benefits include.
- Thoroughly clean surfaces: Sandblasting completely removes grease, dirt, oxidized layers and other impurities from the surface of the material, leaving the surface very clean.
- Improvement of surface roughness: Blasting creates uniformly fine concave and convex surfaces on the surface of the material, increasing the surface roughness and thus improving the adhesion of coatings, adhesives and coatings on the surface of the material.
- Enhanced corrosion resistance: Sandblasting exposes the natural surface of a material, eliminating minor depressions and cracks that can be the starting point for corrosion. By eliminating these potential areas of corrosion, sandblasting can significantly improve a material's corrosion resistance and extend its service life.
- Improvement of mechanical properties: Sandblasting removes oxidized layers and other defects from the surface of the material and restores the original hardness and strength. At the same time, sandblasting can also produce uniform and fine concave and convex surfaces on the surface of the parts, which can help to store lubricant, improve lubrication conditions, reduce noise and improve the service life of machinery.
- Create visual effects: Sandblasting creates an attractive visual effect, giving the surface of the material a unique texture and grain. This effect is particularly popular in the jewelry, art and decorative industries and can provide designers with a wealth of creative expression.
- Wide applicability: Sandblasting technology is applicable to a wide range of materials such as metals, glass, ceramics and composites. This wide applicability makes sandblasting a multifunctional surface treatment technology, and the appropriate sandblasting method can be selected according to different needs and materials.
- Increased efficiency: Sandblasting is an efficient and fast surface treatment method that can greatly improve work efficiency and reduce production costs.
Disadvantages include.
- May damage materials: If the blasting parameters are not set properly (e.g., blasting pressure is too high, abrasive grit size is too large, etc.), the surface of the material may be damaged, even affecting the material's performance and service life.
- Operational complexity and skill requirements: Sandblasting treatment requires specialized operating skills and equipment, and operators need professional training to master it. At the same time, the parameters need to be strictly controlled during the sandblasting process to ensure the consistency and stability of the treatment effect.
- Environmental pollution and protection requirements: The sandblasting process generates a large amount of dust and noise, causing certain pollution and hazards to the environment and operators. Therefore, it is necessary to take effective protective measures and environmental protection measures to reduce pollution and hazards.
- cost investment: For small businesses or the self-employed, the higher cost of sandblasting equipment and abrasives can be a financial strain.
Frequently Asked Questions (FAQs)
Can you sandblast aluminum?
The answer is yes. Hersin is a professional aluminum casting production company. Shot blasting and sand blasting are commonly used in the surface treatment of aluminum castings to make the products more beautiful.
Why sandblast?
In order to make the appearance of the product more neat and beautiful, increase the adhesion of the subsequent coating, and improve the corrosion resistance of the product.
