Anchor Chain Shot Blasting Machine Function and Usage Advantages

Anchor Chain Shot Blasting Machine Function and Usage Advantages
The anchor chain shot blasting machine is a continuous-through type dedicated shot blasting equipment specifically designed for ships and marine engineering. It is customized for round ring anchor chains, mining round chains, and ship mooring chains. It integrates surface cleaning, fatigue strengthening, pre-treatment for coating, and fully automatic continuous production. It is an essential process equipment for quality inspection of anchor chains upon leaving the factory.
I. Core Functions of the Anchor Chain Shot Blasting Machine
(1) Surface Deep Cleaning Function
It can remove the heat treatment oxide scale, forging slag, rust, rolling scale, and oil and dirt from the anchor chain in one go. After cleaning, a uniform metallic matte color is exposed, meeting the appearance inspection standards of classification societies (CCS, LR, ABS).
It cleans the inner side of the chain links, the arc corners, and the concave areas of the welding joints, solving the problem of incomplete cleaning in the corners caused by manual sandblasting and acid washing; multiple shot blasting machines are arranged at a 120° three-dimensional angle, achieving 360° full coverage and no blind areas for blasting.
It removes the micro-bumps, forging scratches, and sharp protrusions on the surface of the chain links, eliminating stress concentration sources and preventing breakage under the alternating tension of the ocean.
(2) Core Function of Surface Fatigue Strengthening (Core Value of the Anchor Chain Shot Blasting Machine)
The high-speed steel balls of the shot blasting machine continuously impact the surface of the chain links, causing a slight plastic deformation on the surface, generating a uniform residual compressive stress layer:
It counteracts the alternating tensile stress caused by wind and waves, waves of the anchor and chain retrieval, and inhibits crack initiation and expansion, increasing the fatigue life of the anchor chain by 2 to 4 times; it refines the metal surface grains, hardens the processing, and enhances the wear resistance, impact resistance, and seawater stress corrosion resistance of the chain links; it eliminates the surface decarburization layer produced during heat treatment, significantly reducing the risk of hydrogen embrittlement and rusting under the salt spray environment, and meeting the high-strength requirements for ocean-going ships.
(3) Pre-treatment Function Before Coating
The shot blasting machine's steel balls form uniform and fine anchor-like roughness, significantly improving the adhesion of epoxy zinc-rich paint and heavy-duty anti-corrosion coatings, preventing peeling and detachment of the paint film, extending the service life of the marine anti-corrosion, and eliminating the need for two pre-treatment processes of sandblasting and acid washing.
(4) Fully Automatic Continuous Conveying Production Function
The shot blasting machine adopts a dedicated traction pulley conveying system, suitable for all specifications of ship anchor chains from φ22 to φ150mm:
It uses variable frequency speed regulation for continuous material feeding (adjustable from 200 to 1500mm/min), ensuring that the entire anchor chain passes through the shot blasting chamber without interruption and at a uniform speed;
It can be connected to heat treatment lines and painting production lines, combined with a crane for automatic loading and unloading, achieving unmanned continuous production;
The high-strength supporting pulleys inside the chamber can support up to 500kg per section of the chain, suitable for large-sized heavy anchor chains.
(5) Closed-loop Particle Separation + Intelligent Dust Control for Environmental Protection
Full curtain multi-stage air separation: Automatically separates broken particles, oxidized dust, and welding slag, recycling qualified steel balls, with a separation purity of over 98%, and extremely low steel ball loss; Negative pressure pulse bag dust removal, with dust emissions of less than 20mg/m³, meeting the environmental protection standards for ship manufacturing; Multiple layers of labyrinth seals completely prevent the scattering of steel balls; PLC touch screen intelligent control: The walking speed, particle flow parameters can be adjusted; Real-time monitoring of the current of the shot head, vibration, and particle level, automatic fault alarm, production data traceable, meeting the requirements for ship inspection traceability.
II. Comprehensive Usage Advantages of the Anchor Chain Shot Blasting Machine
(1) Product Quality Advantage (Meeting Strict Standards of Classification Societies)
Uniform and Stable Strengthening Effect: Three-dimensional multi-angle blasting, 100% coverage of the inner and outer surfaces of the entire anchor chain, completely solving the problem of uneven force in manual sandblasting and insufficient strengthening in local areas; Significantly reduces marine breakage accidents: The compressive stress strengthening layer resists wind and wave alternating loads and seawater salt corrosion, reducing post-sale safety hazards for ships, and improving the qualification rate of anchor chains leaving the factory; Significantly improves the adhesion of anti-corrosion coatings, extending the service life of ship anchor chains, and reducing the maintenance and replacement costs of ships.
(2) Production Efficiency and Automation Advantage Continuous high-speed mass production: Continuous and uninterrupted operation, with production capacity being 5 to 10 times that of hook-type shot blasting and manual sandblasting. It is suitable for large-scale assembly lines of ten-thousand-ton anchor chain factories; Low labor cost: Only one worker is needed to be on duty, no need for dedicated personnel to clean and transfer, significantly reducing heavy physical labor; Flexible and adaptable: The speed control system is compatible with small chains of fishing boats, heavy anchor chains of ocean-going vessels, and circular chains for mining. Switching production does not require complex disassembly and debugging.
(III) Comprehensive production cost advantages
High utilization rate of shot material: The efficient separator reduces the loss of steel balls, compared with acid washing and open-air sandblasting, the cost of consumables is reduced by more than 60%; Multi-process integration: Cleaning, deburring, stress strengthening, and pre-treatment before coating are completed in one step, eliminating the need for acid washing tanks and grinding equipment, reducing factory floor space and equipment investment; Low maintenance and long service life: The overall high-manganese alloy wear-resistant lining of the shot blasting room, the blades of the shot blasting machine can be quickly disassembled (10 minutes for replacement), the replacement cycle of wear parts is long, and the downtime for maintenance is short.
(IV) Environmental protection and safety advantages compared to traditional processes
Pure physical green process: No acid-washing waste acid, heavy metal wastewater, or chemical agent emissions, avoiding environmental penalties for acid washing, meeting the requirements of green factories for ships; Fully enclosed negative pressure dust removal, no dust dispersion in the workshop, the steel balls are multi-layer sealed and do not spill out, improving the working environment of the workshop;
Complete safety interlock: Door power-off protection, overload protection, shot material shortage alarm, eliminating the risk of equipment idling and steel balls flying out and injuring people.
(V) Unique advantages compared to manual pneumatic sandblasting
Centrifugal shot blasting has a stronger impact force, capable of reaching the strengthening strength specified by the classification society; Manual sandblasting has insufficient pressure and can only remove rust, unable to achieve deep fatigue strengthening; The inner side of the chain link and the welding blind spots can be fully processed, while manual sandblasting is prone to missed spraying, resulting in local corrosion and strength not meeting standards; Automated continuous operation, no need for manual holding of the spray gun, eliminating safety hazards of high-altitude and heavy-piece sandblasting.
III. In conclusion
Anchor chain shot blasting machines are not only rust removal and cleaning equipment, but also specialized fatigue strengthening equipment for ship anchor chains. They are customized for the special structure of ring-shaped chains, focusing on three-dimensional shot blasting, continuous traction and transportation, taking into account product safety quality, large-scale production efficiency, environmental protection and low cost. They are an indispensable standard process equipment for ship and marine engineering anchor chain production lines.