Automatic Pass-through Conveyor Sand Blasting Machine with PLC Control and 220V/380V/440V Voltage for 2000mm x 1500mm x 1800mm Workpieces

The automatic pass-through conveyor sand blasting machine is a highly automated surface processing unit developed for the continuous treatment of metallic and non-metallic workpieces. Equipped with fixed conveying systems including belt, wire mesh and roller conveyors, it transports components into an enclosed blasting chamber. Inside the sealed cabinet, compressed air propels abrasives to bombard workpiece surfaces, fulfilling tasks such as surface cleaning, texturing and compressive strengthening. Well-suited for mass production of medium and small flat or regularly shaped parts, this equipment delivers remarkable processing efficiency alongside stable, uniform finishing quality.

1. Fully Automated Continuous Processing
   • The conveyor system realizes seamless feeding and unloading of workpieces, removing manual operation throughout the whole workflow from loading and blasting to finished part discharging. Capable of stable 24-hour non-stop operation, it greatly elevates production efficiency and perfectly fits high-volume batch manufacturing requirements.
   • Conveyor travel speed is fully adjustable, allowing flexible coordination with blasting intensity. This ensures workpieces made of various materials and in different sizes can obtain adequate surface treatment, effectively avoiding under-blasting or excessive over-blasting issues.
2. High-Precision Surface Cleaning and Roughening
   • Effectively removes surface contaminants such as rust, oxide scale, welding slag, mold release agent residues, and old paint films from workpieces. It can handle flat parts (e.g., steel plates, aluminum alloy panels), castings, forgings, and stamping parts with uniform cleaning results.
   • Creates a uniform rough surface (Ra 3.2–12.5 μm adjustable) on the workpiece surface, which significantly enhances the adhesion of subsequent coatings (painting, spraying, electroplating) and avoids coating peeling.
3. Strong Adaptability to Workpiece Specifications
   • Conveyor types can be customized according to workpiece characteristics:
     • Mesh belt conveyor: Suitable for small, light workpieces (e.g., hardware accessories, fasteners, small castings).
     • Roller conveyor: Suitable for heavy, flat workpieces (e.g., steel plates, steel profiles, large stamping parts).
     • Belt conveyor: Suitable for irregular-shaped workpieces that require stable conveying.
   • The blasting chamber size, abrasive flow rate, and air pressure can be adjusted to adapt to workpieces of different thicknesses, widths, and materials (steel, aluminum alloy, copper, non-ferrous metals, etc.).
4. Environmentally Friendly and Resource-Saving Design
   • Equipped with a sealed blasting chamber + high-efficiency dust removal system (bag dust collector or cyclone dust collector), which can collect more than 99% of dust and abrasive particles, meeting strict environmental emission standards and protecting the workshop environment and operator health.
   • Integrated abrasive recycling and screening system: Used abrasive is recycled, screened to remove impurities (dust, oxide skin), and reused, reducing abrasive consumption by 60%–80% and lowering production costs.
5. Intelligent Process Control and Safety Protection
   • Fitted with a PLC intelligent control system, the machine supports the configuration and storage of multiple sets of process parameters including conveyor speed, air pressure and abrasive flow rate. It enables one-touch startup for recurring production tasks and effectively minimizes operational errors caused by manual misoperation.
   • A full range of safety protection mechanisms is integrated into the equipment, covering emergency stop switches, overpressure warning devices and door interlock systems that instantly suspend blasting once the chamber door is opened. An abrasive material level monitoring function is also included to guarantee stable and secure running throughout production.

1. Sheet Metal and Steel Structure Industry
   • This machine is used to clean and roughen steel plates, aluminum sheets, steel profiles and curtain wall components prior to painting or spray coating. It effectively enhances the finished products’ corrosion resistance and decorative appearance, and has been widely adopted for processing construction steel structures, household appliance casings and automotive sheet metal components.
2. Casting and Forging Industry
   • It removes adhered molding sand, oxide scale and burrs from small and medium-sized castings such as gray iron, ductile iron and aluminum alloy castings, as well as various forgings. Replacing conventional manual grinding and acid pickling methods, this blasting process delivers higher efficiency with better environmental performance while greatly upgrading the surface quality of cast workpieces.
3. Hardware and Fastener Industry
   • This equipment enables mass surface processing for screws, nuts, bolts, hinges, locks and other hardware fittings. It strips surface oxide films and burrs to optimize product surface appearance, while creating an ideal bonding substrate for subsequent electroplating or hot-dip galvanizing procedures.
4. Automotive and Motorcycle Parts Manufacturing
   • It is applied to clean and roughen auto chassis components, engine supports, motorcycle frames and wheel hubs prior to electrophoretic coating or painting. The treatment greatly strengthens coating adhesion and extends the service lifespan of these mechanical parts.
5. Non-Metal Material Processing
   • Surface treatment of non-metal workpieces such as glass (frosted effect), ceramic tiles (anti-slip surface), and composite materials (roughening to enhance bonding force). It expands the application scope of sand blasting technology beyond the metal processing field.

• High efficiency: Continuous conveyor design realizes mass production, with processing efficiency 3–5 times higher than manual or semi-automatic sand blasting machines.
• Stable quality: Consistent conveying speed and blasting parameters ensure uniform surface treatment effect of workpieces, avoiding quality differences caused by manual operation.
• Low labor cost: Fully automated operation reduces the number of operators, and only requires personnel to be responsible for loading and unloading and parameter monitoring.
• Environmental compliance: Closed-loop dust removal and abrasive recycling meet modern environmental protection requirements, reducing the environmental impact of production.