Application Of The Mesh Belt-Type Shot Blasting Machine in The Aluminum Industry

Application of the Mesh Belt-Type Shot Blasting Machine in the Aluminum Industry
The aluminum material is soft in texture, has thin walls that are prone to deformation, has high appearance requirements, is flammable and explosive with aluminum powder, and strictly prohibits the infiltration of iron elements. Traditional tracks, hooks, and sandblasting equipment all have obvious shortcomings. The mesh belt-type shot blasting machine, which is customized and optimized for the pain points of aluminum parts, is the preferred equipment for batch surface treatment of 3C, new energy, automotive die-casting aluminum, and aluminum profiles. The advantages of the mesh belt-type shot blasting machine are divided into six aspects:
A. Workpiece transportation: Single-layer flat placement, no deformation, perfect protection of appearance
The mesh belt-type shot blasting machine has no rolling collision and eliminates scratches and pits
High manganese steel mesh belt is placed in a single layer for feeding, the workpiece is not stacked or rolled throughout the process; compared with the track-type shot blasting machine (the workpiece is mutually crushed and impacted, large areas of polished aluminum parts are scratched, edges and corners are chipped), the appearance yield is stable at 98% - 99%, suitable for aluminum frames of laptops, battery shells, lighting fixtures, and the exteriors of new energy shells, etc. for appearance parts.
Low-stress transportation of thin-walled parts, preventing deformation
0.8 - 5mm ultra-thin aluminum shells, water-cooled plates, heat dissipation thin sheets are uniformly stressed, without track compression or hook lifting and pulling deformation risks; optional polyurethane rubber-coated mesh belt, further reduces bottom contact marks, and the matching workpiece crawling mechanism eliminates mesh belt contact dead corners.
Suitable for flat, small, and complex aluminum castings
Aluminum shells of auto parts, pressure valves, pistons, short aluminum profiles, radiator teeth plates can be smoothly transported, slender, flat, and cavity-type small parts will not get caught or fall.
B. Shot Blasting Process： The mesh belt-type shot blasting machine has controllable speed and uniformity throughout the area, suitable for the soft characteristics of aluminum materials
Variable frequency low-impact blasting, avoiding perforation and chipping
Multiple sets of upper and lower / oblique explosion-proof variable-frequency lightweight shot heads, the velocity of the shot is 50 - 70m/s (steel shot blasting machine 100m/s), the rotational speed is adjustable continuously; combined with 0.2 - 0.6mm stainless steel shot / glass beads, the impact force is gentle, thin-walled aluminum parts will not have perforation or edge corner defects.
Full coverage in multiple angles, no cleaning dead corners
Shot heads are arranged in a three-dimensional layout, synchronously cleaning the front and back sides, sides, heat dissipation ribs, and deep grooves of the workpiece; the roughness is precisely controllable at Ra1.6 - 75μm, which can achieve a similar fine matte texture to automatic sandblasting, with consistency far superior to manual sandblasting, meeting the roughness requirements for anodizing, powder spraying, and spraying pre-treatment, significantly improving the coating adhesion by 1 - 2 levels.
Eliminate casting defects + release residual stress
One-time removal of aluminum casting release agents, oxide skins, flow marks, and fine burrs; simultaneous reduction of casting and stamping tensile stress, subsequent high-temperature spraying and anodizing processes are less likely to warp or crack.
C. Automation of the mesh belt-type shot blasting machine production capacity： continuous assembly line, highly integrated, significantly reducing labor
Uninterrupted continuous production, efficiency surpassing sandblasting and hook machines
The mesh belt speed is 0.5 - 5m/min, adjustable continuously, with an hourly production capacity of 200kg - 2 tons; under the same conditions, the production capacity is 8 - 15 times that of automatic sandblasting and 30 times that of manual sandblasting; the hook-type requires batch lifting and frequent stoppages for loading and unloading, and is only suitable for small-batch single-piece processing.
Full integration of the entire production line, achieving unmanned operation
It can be directly connected to the die-casting machine discharge line, cleaning line, spraying line, and anodizing production line; combined with automatic feeding, loading and blowing, discharging and collecting mechanisms, the entire process only requires 1 person for inspection, significantly reducing handling and loading/unloading labor costs.
Stable batch consistency, reducing rework rate
Uniform feeding + fixed blasting parameters, the roughness and matte color of the same batch of aluminum parts have no obvious color difference, reducing appearance defects rework, suitable for large-scale standardized mass production (mainstream production lines for new energy battery aluminum shells and 3C shells).
D. Cost and material advantages： The shot blasting machine of the mesh belt-type has a high recovery rate of shot materials, and the long-term comprehensive cost is lower
The utilization rate of stainless steel shot is > 95% Equipped with a triple separation system of cyclone + vibrating screen + magnetic separation, it can precisely screen out crushed pills, aluminum dust, and oxide scale, and recycle the complete stainless steel pills in a closed loop; it completely eliminates the high-cost of consumables such as ordinary sandblasting brown corundum.
It avoids iron leakage defects and reduces scrap losses.
The dedicated stainless steel pill separation system isolates iron debris and prevents iron elements from embedding in the aluminum matrix; it solves the batch scrap problems of subsequent anodes and powder spraying with rust spots, discoloration, and unsatisfactory salt spray, which are the core pain points of aluminum material processing.
Large-scale production recovers costs quickly.
In scenarios with a daily output of ≥ 3 tons of aluminum parts, compared to sandblasting equipment, the equipment price difference can be recovered within 1 to 3 months; the comprehensive costs of power consumption, consumables, and labor for shot blasting are significantly lower.
E. Safety and explosion-proof: Aluminum powder exclusive protection system, eliminating the risk of dust explosion
Aluminum dust is an inflammable and explosive medium. The dedicated aluminum material model of the mesh belt type is equipped with a complete set of explosion-proof configuration, which is a core advantage that ordinary shot blasting machines do not have:
Mesh belt type shot blasting machine explosion-proof configuration: explosion-proof motor, explosion-proof control cabinet, explosion-proof fan;
Dust removal system: wet explosion-proof filter dust removal, spark detection, automatic sprinkler fire extinguishing device;
Fully sealed negative pressure chamber + double-layer rubber dust-proof curtain, centralized and sealed collection of aluminum dust, no dust in the workshop;
Static electricity prevention belt, grounding full circuit, eliminating the risk of static electricity igniting aluminum powder, in line with the environmental protection and safety supervision standards of the die-casting factory.
F. Environmental protection and versatility advantages
Mesh belt shot blasting machine replaces the acid washing process, green and pollution-free
Dry physical shot blasting completely replaces acid washing to remove oxide scale, no waste acid, wastewater treatment costs, no risk of corrosion of workpieces by acid and alkali, less environmental protection compliance pressure.
Single machine multi-specification flexible production
Changing the width of the mesh belt, adjusting the power of the shot head, replacing the pellets, can be compatible with 3C aluminum parts, automotive die-casting parts, architectural aluminum profiles, and new energy heat dissipation aluminum parts processing; short aluminum profiles, flat aluminum plates, and small shells can all be used.
Closed and low-noise, friendly workshop conditions
Fully enclosed shot blasting room, sound insulation structure, no dust spillage, compared to open-air sandblasting rooms, it significantly improves the workshop environment and reduces environmental protection investment.
G. Mesh belt shot blasting machine is suitable for typical scenarios of aluminum
3C industry: notebook / tablet aluminum middle frame, mobile phone battery aluminum shell, communication heat dissipation shell;
New energy: battery aluminum shell, water cooling plate, photovoltaic aluminum heat dissipation component;
Automotive parts: aluminum compressor housing, steering gear, caliper, piston, motor aluminum end cover;
Die-casting hardware / lighting: bathroom aluminum valve body, lighting aluminum die-casting parts, door and window aluminum accessories;
Aluminum profile processing: short-cut industrial aluminum profiles, heat dissipation aluminum strips, decorative aluminum plates pre-treatment.