Pass Through Type Automatic Sand Blasting Machine With Mesh Conveyor Or Roller Conveyor

An automatic pass through sand blasting machine with conveyor is a highly automated surface treatment device designed for continuous processing of metal or non-metal workpieces. It relies on a fixed conveyor system (e.g., belt conveyor, mesh belt conveyor, roller conveyor) to feed workpieces through a sealed blasting chamber, where compressed air-driven sand or abrasive grit impacts the workpiece surface to achieve cleaning, roughening, or strengthening effects. This equipment is ideal for mass production lines of small-to-medium-sized, flat, or regular-shaped workpieces, with high processing efficiency and consistent quality.

1. Fully Automated Continuous Processing
   • The conveyor system enables uninterrupted feeding and discharging of workpieces, eliminating manual handling in the entire process (from loading to blasting to unloading). It supports 24-hour continuous operation, which significantly improves production efficiency and is suitable for large-batch production scenarios.
   • The conveyor speed is adjustable, which can be matched with the blasting intensity to ensure that workpieces of different materials and sizes receive sufficient surface treatment without over-blasting or under-blasting.
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
   • Equipped with PLC control system, which can set and store multiple process parameters (conveyor speed, air pressure, abrasive flow rate) to realize one-key operation and reduce human error.
   • Built-in multiple safety protection devices: emergency stop button, overpressure alarm, door interlock (blasting stops automatically when the chamber door is opened), and abrasive level monitoring to ensure safe operation.

1. Sheet Metal and Steel Structure Industry
   • Surface cleaning and roughening of steel plates, aluminum alloy panels, steel profiles, and curtain wall components before painting or spraying. It ensures the corrosion resistance and aesthetics of the finished products and is widely used in the production of construction steel structures, home appliance shells, and automotive sheet metal parts.
2. Casting and Forging Industry
   • Cleaning of surface sand, oxide scale, and burrs of small-to-medium-sized castings (gray iron, ductile iron, aluminum alloy castings) and forgings. It replaces traditional manual grinding and acid pickling processes, which is more environmentally friendly and efficient, and improves the surface quality of castings.
3. Hardware and Fastener Industry
   • Batch surface treatment of screws, nuts, bolts, hinges, locks, and other hardware accessories. It removes surface oxide layers and burrs, improves product appearance, and provides a good base for subsequent electroplating or galvanizing.
4. Automotive and Motorcycle Parts Manufacturing
   • Surface cleaning and roughening of automotive chassis parts, engine brackets, motorcycle frames, and wheel hubs before electrophoresis or painting. It enhances the coating adhesion and prolongs the service life of 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.