Roller Conveyor Continuous Pass-Through Shot Blasting Cleaning Machine (HLTQ69 Series Steel Plate & Profile Automatic Blasting Equipment)

This roller-conveyor shot blasting machine is an automated system that utilizes a roller conveyor to automatically feed workpieces into a blasting chamber for continuous, pass-through surface treatment. Its core operating principle is as follows: workpieces are placed onto the conveyor rollers via a loading mechanism, and an electrically controlled, variable-speed roller conveyor transports the steel structures or steel components into the blasting zone within the machine’s chamber. Inside the chamber, high-speed rotating blast wheel impellers accelerate the abrasive media (shot) using centrifugal force, projecting it in a dense, fan-shaped stream. The surfaces of the workpiece are subjected to powerful, concentrated impact and abrasion from the shot arriving from various angles, causing mill scale, rust, welding slag, and other contaminants to detach rapidly. The resulting steel surface is clean and possesses a specific degree of roughness, revealing the underlying metal. Roller conveyors at the inlet and outlet facilitate the loading and unloading of workpieces. An abrasive circulation system collects the used shot and debris, transporting them via a bucket elevator to a separator that sorts the shot from slag and dust; clean shot is recycled, while dust is filtered by a dust collection system to meet emission standards. The entire process operates in a continuous cycle, enabling automated assembly-line production.

Regarding manufacturing and structural quality, the machine comprises several key components: the blasting chamber, blast wheel assemblies, the roller conveyor system, a bucket elevator, a separator, a screw conveyor, a dust collection system, and an electrical control system. The blasting chamber features a fully enclosed, box-like structure welded from structural steel sections and high-quality steel plate, ensuring high strength and rigidity. The interior walls are lined with wear-resistant ZGMn13 high-manganese steel plates, which effectively withstand shot impact and protect the chamber walls from wear, thereby ensuring a long service life. A spacious maintenance door allows for easy servicing and replacement of internal wear parts; a safety interlock switch ensures the blast wheels can only be started when the door is closed. The conveyor rollers are equipped with wear-resistant high-chrome sleeves and positioning guides to ensure operational stability. The blast wheels utilize a single-disc design and are constructed from high-chrome material to enhance wear resistance. The separator utilizes a multi-stage air-wash design featuring an overflow-type, controllable full-curtain flow, ensuring high separation efficiency for shot, slag, and dust. The dust collection system employs either a pulse-jet cartridge or a bag-type dust collector, achieving a purification efficiency of 99.5%. The control system integrates multiple safety protection mechanisms, such as emergency stop switches and access door interlocks.

This roller-conveyor shot blasting machine offers outstanding performance advantages and application value. First, it delivers high continuous production efficiency; the roller conveyor ensures workpieces pass through the blasting zone without interruption, enabling automated assembly-line production. Second, it ensures uniform cleaning quality; the multi-angle arrangement of the blast wheels subjects all surfaces of the workpiece to a powerful, dense barrage of abrasive media from various directions. Third, it offers strong versatility, making it suitable for surface cleaning a wide range of workpieces, including steel plates, structural steel sections (such as H-beams, I-beams, channels, and angles), welded structures, space frames, and steel pipes. Fourth, it is multifunctional; it can perform surface rust removal and cleaning as well as shot peening for surface strengthening, which eliminates internal stress and enhances fatigue and corrosion resistance. Fifth, it features excellent environmental sealing; the pulse-jet dust collection system ensures effective dust capture and compliance with environmental emission standards.

In terms of application, this roller-conveyor shot blasting machine is widely used across industries such as shipbuilding, automotive manufacturing, rolling stock, bridge construction, architecture, general machinery, metallurgy, petroleum, and chemicals. Typical workpieces include steel plates, structural steel sections (H-beams, I-beams, channels, angles), box girders, space frames, steel pipes, welded structures, and large-scale steel components. The equipment is suitable for processes such as rust removal, stress relief, and pre-treatment prior to painting for steel components and raw steel materials. Shot blasting produces a uniform metallic surface finish with consistent texture, improves paint adhesion, eliminates internal stress, and enhances the material’s fatigue strength and corrosion resistance.