Foundry Industry
1. Casting Cleaning: In foundries, the tumble belt shot blasting machine is widely used for cleaning castings. Castings often have sand residues, scale, and other impurities on their surfaces after the casting process. The machine can effectively remove these impurities, leaving a clean and smooth surface. For small to medium - sized castings, the tumble belt design allows for batch processing. For example, in the production of aluminum alloy castings for automotive parts, the tumble belt shot blasting machine can quickly clean a large number of castings at once, improving production efficiency.
2. Surface Preparation for Coating: Before applying coatings or finishes to castings, it is essential to have a clean and rough - textured surface for better adhesion. The shot - blasting process using the tumble belt machine not only cleans the surface but also creates a suitable surface roughness. This roughness increases the surface area, allowing the coating to bond more effectively. In the production of decorative castings for the furniture industry, the tumble belt shot blasting machine is used to prepare the surface before applying a protective and aesthetically pleasing paint finish.
Automotive Industry
1. Component Cleaning: The automotive industry has a vast number of small to medium - sized components that require surface treatment. Parts such as engine components, gears, and brackets often need to be cleaned of rust, scale, and machining residues. The tumble belt shot blasting machine can handle these components in batches, ensuring consistent and high - quality cleaning. For example, in the production of transmission gears, the machine can remove any heat - treatment scale and improve the surface finish, which is crucial for the smooth operation of the gears.
2. Shot Peening for Fatigue Resistance: Shot peening is a process where the surface of a component is bombarded with small shots to introduce compressive stresses. This improves the fatigue resistance of the component. The tumble belt shot blasting machine can be used for shot peening automotive components. For instance, in the manufacturing of suspension components like control arms, shot peening using a tumble belt shot blasting machine can significantly increase the lifespan of these parts by reducing the risk of fatigue failure.
Aerospace Industry
1. Precision Component Treatment: The aerospace industry demands the highest level of quality and precision in component manufacturing. Tumble belt shot blasting machines are used to clean and treat small to medium - sized aerospace components. These components, such as turbine blades and fasteners, need to be free of any contaminants and have a specific surface finish. The machine can achieve the required surface cleanliness and roughness standards. For example, in the production of titanium alloy fasteners for aircraft, the tumble belt shot blasting machine can remove any oxide layers and prepare the surface for further processing.
2. Surface Integrity Enhancement: The surface integrity of aerospace components is critical for their performance and safety. Shot blasting using a tumble belt machine can improve the surface integrity by removing any surface defects and introducing beneficial compressive stresses. This helps in enhancing the fatigue life and corrosion resistance of components. In the manufacturing of aircraft engine components, the tumble belt shot blasting machine is an essential part of the surface treatment process to ensure the reliability of these high - stress components.
Technical Features and Specifications of Chinese Tumble Belt Shot Blasting Machines
1 Machine Dimensions and Workpiece Capacity
（1） Overall Dimensions: Chinese tumble belt shot blasting machines come in a variety of sizes. For example, some smaller models may have overall dimensions of approximately L×W×H = 1950 × 1950 × 2550 mm. These compact machines are suitable for workshops with limited space. Larger industrial - scale models can have dimensions such as 4300 mm x 3500 mm x 6200 mm. These larger machines are designed to handle higher production volumes.
（2） Workpiece Maximum Dimension and Weight: The machines are designed to accommodate different sizes and weights of workpieces. Some models can handle workpieces with a maximum dimension of a certain size (varies by model) and a maximum weight of up to 20 kg per piece. For batch processing, the loading capacity of the tumble belt is also an important factor. For instance, a tumble belt may have a loading capacity of 260 kg, allowing for the simultaneous treatment of multiple workpieces.
2 Blasting Performance
（1） Blast Cleaning Effect: Chinese tumble belt shot blasting machines can achieve high - quality blast cleaning effects. According to standards such as GB 8923 - 88, they can typically reach a cleanliness level of SA2.5. This means that the surface of the workpiece is thoroughly cleaned, with only a very small amount of residue remaining.
（2） Surface Finishing Roughness: The machines can control the surface finishing roughness within a specific range. Usually, the roughness can be adjusted to be in the range of 10 - 50 μm. This level of roughness is suitable for various applications, from preparing surfaces for painting to enhancing the adhesion of coatings.
（3） Cleaning Efficiency: In terms of cleaning efficiency, many Chinese models can achieve a high throughput. For example, they can clean more than 1500 kg per load, which is highly efficient for industrial - scale production.
3 Construction and Material Quality
(1) Blasting Chamber: The blasting chamber is a critical part of the machine. In Chinese - made machines, it is often constructed using high - quality materials. For example, some chambers are made of Mn13 steel plates. This material offers excellent wear resistance due to its high manganese content. The use of Mn13 steel plates ensures that the chamber can withstand the continuous impact of the high - velocity steel shots over an extended period without significant wear and tear.
(2)Blast Wheel Components: The blast wheel components, such as the impeller and blades, are also made of high - quality materials. Precision - cast replacement parts are often used, which have a long service life. The blast wheel is carefully balanced through dynamic balance testing. This reduces vibration and noise during operation and ensures the consistent and efficient throwing of steel shots.
4 Dust Collection and Environmental Considerations
(1) Dust Collection System: Chinese tumble belt shot blasting machines are equipped with effective dust collection systems. Many models use a pulse - jet dust removal system. For example, a system with a 30 m² filtering area can effectively capture dust particles. The dust density discharge is typically ≤ 10 mg/m³, which meets strict environmental regulations.
(2) Environmental Friendliness: By effectively collecting dust and recycling abrasive media, these machines contribute to a cleaner working environment. The recycling of abrasive media also reduces waste and the need for constant replenishment of new media, making the overall operation more sustainable and environmentally friendly.
