How to Boost the Efficiency of an Abrasive Blasting Machine

Sandblasting machines are the main equipment for surface treatment, and their quality directly correlates with the user's operating condition and efficiency, making them a "high ground" fiercely sought after by businesses. In terms of development, the early sandblasting machines were jet-type (vacuum-type), which used air jet vacuum to吸入 abrasive into the mixing chamber and spray it onto the workpiece. Due to their low energy utilization rate and low sandblasting efficiency, they are not suitable for large-area and high-power treatment, and have gradually been replaced by direct-pressure sandblasting machines. The key feature of this type of machine is its high sandblasting flow, strong jetting force, high energy utilization rate, and high sandblasting efficiency. Furthermore, the impact of sandblasting equipment on treatment efficiency also includes the rationality of structural design, the continuity of operation, ease of use, and the responsiveness and convenience of the system. With the rapid development of the shipbuilding and ship repair industries, to improve sandblasting efficiency and reduce the time wasted due to machine downtime for sand refilling, twin-cylinder single and multi-sandblasting machines have emerged. Twin-cylinder sandblasting machines can continuously add sand without stopping, enabling continuous operation and significantly improving efficiency, which has been widely used since 2001. Other factors affecting sandblasting efficiency include abrasive condition, operator proficiency, nozzle material, etc. While the impact of individual factors on sandblasting efficiency is quite direct, due to environmental constraints, it is difficult to achieve ideal results with all factors. For example, the nozzle diameter, which should ideally be as large as possible, should not exceed 12mm from a safety perspective, as prolonged manual operation can lead to fatigue. Additionally, when the air compressor's air supply is 6m³/min, using a Φ12mm nozzle (at this point, a Φ10mm nozzle should be used) will not increase but actually decrease the treatment efficiency. To maximize the efficiency of sandblasting and reduce operational costs, it is necessary to comprehensively analyze and allocate according to the specific environmental conditions to achieve optimal results. How to improve sandblasting efficiency and reduce operational costs? Spraying and workpiece distance During sandblasting, it is crucial to adjust the correct distance between the spray and the workpiece. For a general pressure sandblasting machine, the effective distance between the spray and the workpiece is between 80mm and 130mm, while for a high-pressure sandblasting machine, it is between 200mm and 400mm. The actual condition of the workpiece should be considered; for example, if the workpiece is hard, the distance should be closer, and if the workpiece is soft, the distance should be farther. A greater pressure in sandblasting requires a greater distance between the spray and the workpiece, while a lower pressure requires a shorter distance. Air compressor selection The air compressor is an auxiliary equipment for the sandblasting machine and an essential power source for sandblasting. The sandblasting machine has strict requirements for the selection of air compressors, such as air source flow rate and purity. Generally, for a sandblasting nozzle of 8mm with a pressure of 6kg, the required air source flow rate is 0.8 cubic meters per minute, with approximately 15% reserved according to the manufacturer's specifications. The total air consumption per sandblasting operation is 1 cubic meter per minute of clean air. For two sandblasting nozzles, the air consumption is 2 cubic meters per minute, and the consumption increases proportionally with the number of nozzles. Sandblasting angle Many people believe that a 90-degree angle is the best for sandblasting on the work surface, but this is incorrect. The optimal angle for sandblasting is 45 degrees, as this is the angle at which the sandblasting effect is most effective. Sandblasting consumables selection Many customers, in an effort to save costs, use industrial river sand and inexpensive quartz sand, and mineral sand. These sands are very inexpensive, costing only a few hundred yuan per ton. After use, the sandblasting workshop is filled with dust, the sandblasting equipment looks unsightly, and it can be harmful to the workers' health. In reality, while this may seem to save money, it is actually a significant waste of costs. For example: machine wear, worker health issues, factory environment, etc. It is essential to choose high-quality abrasives, which are generally divided into three grades: 3A, 3B, 2A, 2B, 1A, 1B. The price and quality vary by grade, and users should select based on their specific conditions. Maintenance of wear parts Generally, the moving parts of the sand can be called wear parts. As professionals, we use wear-resistant materials for all wear parts to minimize wear. Wear parts typically include: nozzles, spray bodies, sand nozzles, air nozzles, sand tubes, air tubes, backflow tubes, viewing glass, gloves, silicone, etc. Users must pay attention to the inspection and maintenance of wear parts during operation and replace them promptly if wear is detected. Worker operation training Some sandblasting machines are manually operated, and the operation is carried out by humans. In such cases, there are high requirements for the operators, as the efficiency and quality of sandblasting depend on the sandblasting operator's skills. Operators may repeatedly sandblast a specific part of a product, which is known as double sandblasting. If operators are not familiar with the sandblasting machine's functions and operation, it can cause damage to the equipment. Operators may also replace wearable parts unnecessarily. Sandblasting dust removal systems may not be installed according to the instruction manual.