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Rotating drum type wheel blasting machine
The rotating drum (barrel) shot blasting machine offers a cost-effective, simple yet effective solution for cleaning small to medium-sized ferrous and non-ferrous parts, including castings, forgings, and heat-treated components. Ideal for batch processing very small items, its cement mixer-style tumbling chamber ensures uniform exposure to the blast wheel and supports fully automated configurations. Standard models are available in 3, 6, or 12 cubic foot capacities.
Disa rotating drum batch series features a robust single-container design that prevents the jamming, deformation, and discharge failures common in conventional machines. By using a simple rotating and tilting mechanism, it ensures complete part removal without the risk of items getting caught in belts. This streamlined structure drastically cuts maintenance costs and labor, replacing numerous expendable parts found in typical systems with just one replaceable container.
Read through the following sections for more description:
Operation sequence of the rotating drum blasting machine:
Workpieces are loaded via standard baskets into the rotating drum, which then swings into position for high-performance blasting while continuously tumbling to ensure thorough cleaning. The chamber features durable, replaceable steel linings and operates under a slight vacuum to contain dust, with safety interlocks preventing door access until the environment is clear. After blasting, parts are discharged through a vibrating chute to remove residual abrasive, while used shot is automatically recycled through a screw conveyor and bucket elevator system that includes air cleaning and dust collection for efficient waste management.
Parts of a standard tumble rubbe belt wheelblasting machine
1) Shot blasting chamber
The chamber employs a welded steel structure consisting of a shell, roof, and internal protective components. The 8mm steel plate shell houses a screw conveyor at the base, with a crawler and transmission mechanism installed internally. Both ends are sealed with end disks, while a hanging door provides front access. Internal surfaces are lined with δ12 rolled Mn13 wear-resistant guard plates, offering a standard service life of 3 years. The shot blaster unit is roof-mounted for optimal operation.
2)Shot blast wheel
Disa rotating drum shot blasting machine utilizes a robust 15kW high-performance turbine with a double-disc design, ensuring efficient, uniform cleaning and extended component life. Positioned directly above the chamber for optimal abrasive flow, The abrasive valve is right above the shot blaster. Once the loading process finishes, the drum moves to the shot blasting position and the shot blasting chamber closes simultaneously.
3) Rotating drum
The inner surface of the rotating drum(barrels) is made of high-manganese sheet steel in a special shape, in order to allow blasted shot particles to repel many times inside the barrel for increased blasting density. In addition, the infinitely varied projection direction results allows for a thorough reach such as the dead corners of objects. By this high density blasting with the stirring and repelling effect, Disa rotating drum series Shot Blast Machines enables shorter processing time than ordinary apron-type machines.
in the effective turbine range are made of wear resistant 12mm ostinetic manganese steel.
6) Abrasive Separator
The used steel shot is in constant circulation the recovery funnel below .the blast chamber is used to move the used and dusty material via a screw conveyor to the bucket conveyor upon reaching the cleaning station at the top .the abrasive is air washed and cleaned of dust and undersized particles .this waste air is also routed to the center lamella filter.
7) Abrasive control valves
The abrasive control system features a simple, reliable pneumatic design with an integrated adjusting device and air cylinder-controlled stroke, enabling remote regulation of blasting capacity and secure valve closure. Positioned in-line with the feed pipes just above the blast unit, these totally enclosed DISA abrasive control valves significantly reduce noise while offering precise pneumatic fine-adjustment capabilities to accurately control the flow and volume of supplied abrasive.
8)Tumble Belt and Drive System
The tumble belt system consists of a drive roller, driven roller, support rollers, and an endless rubber tumble belt. The belt is capable of bidirectional rotation:
Forward rotation: for cleaning operations
Reverse rotation: for unloading operations
When the access door is closed, the belt can only rotate forward and is locked against reverse rotation to prevent malfunctions.
The end discs and tumble belt form a semi-circular open trough that facilitates workpiece tumbling, ensuring comprehensive coverage by the shot blasting wheel. The end discs are fabricated from wear-resistant materials.
The wear-resistant rubber tumble belt is perforated with small holes to allow spent pellets to fall through to the steel mesh screen at the bottom, where they are screened and returned to the pellet circulation system.
The tumble belt is equipped with a tensioning device. During operation, the belt tension should be regularly inspected and adjusted to ensure proper performance.
9)Exhaust System
A fan generates the negative pressure required for continuous dust extraction from the blast chamber thereby moving the waste air to be cleaned to a bag filter. upon completion of the blasting procedure a cleaning phase follows whether fine abrasive is removed from the drum and the very small work pieces. the dust is separated via jets of compressed air and collected in the collecting tanks installed underneath which can be easily emptied.
10)Electric control cabinet
An independent control panel having the latest control system is provided. The Digital Ammeter and Voltmeter are fitted for instant and accurate reading. It also entails contactors, relays, push buttons, main isolation switch, in-built single phase preventor, overload protection, HRC fuses, indicating lamps etc. Various safety features are in-built in the system like blast wheel motor will not operate if door is opened.
All starters up to 11kw will be Direct on the Line (DOL) and all starters above will be Star Delta types. All internal panel wiring is complete and the panel will be fitted with a mains isolators switch voltmeter and an ammeter .
References
Disa delivered the DSGT700 drum blast machine suitable for the processing of small parts that are handled as bulk material . the design of the drum blast machine is particularly well suited for the processing of small parts .The small diameter of the holes in the drum 4 millimeter wide holes enables the processing of extremely small workpieces.
