What are the characteristics of the special automatic sandblasting machine for removing burrs from electronic products?

The core of the automatic sandblasting machine for deburring electronic products is low pressure precision, dust-free and clean, fully automatic closed loop, flexibility and no damage to the substrate, which is specially used to solve the problems of tiny burr, narrow seam/deep Kong Fei edge, batch consistency and cleanliness of 3C small parts. The following are the core features, key systems, applicable scenarios and key points of selection.

First, the core features (exclusive to the electronics industry)

1. Low-pressure flexible sandblasting does not damage the precision substrate.

The working pressure is 0.2-0.5 MPa (0.6-0.8 MPa for ordinary industrial machines), which is accurate and controllable, and avoids deformation, edge collapse or scratches of thin-walled and soft electronic components (aluminum/zinc alloy, PC/ABS, bakelite and ceramics).

Fine high-purity sand (# 800–# 2000), glass beads and resin sand are used as abrasives, with moderate sharpness, and only tiny burrs (≥0.02 mm) are embrittled without cutting the body.

The roughness can be controlled with Ra 0.1–1.0μ m, which meets the mirror/matte requirements of electronic appearance parts, connectors and terminals.

2. Micron deburring, no dead angle

Multi-gun+servo swing+workpiece rotation (turntable/drum/fixture), 360 coverage, accurate treatment of manual and difficult parts such as holes, grooves, mold closing lines and pin roots.

Minimum 0.01 mm flash can be removed, and the qualified rate is ≥99.5%, so as to prevent short circuit, assembly sticking and poor appearance.

XYZ NC positioning of gun rack, which can store multi-product programs and switch with one button, is suitable for multi-variety flexible production.

3. Totally enclosed and dust-free, suitable for the cleanliness of electronic workshop.

The closed cabin of the whole machine+negative pressure ventilation+multistage dust removal (primary effect+HEPA), with dust concentration ≤ 5 mg/m and no overflow, meets the requirements of Class 1000-10000 clean workshop.

Abrasive closed-loop recovery+precision classification (cyclone+vibrating screen), dust is separated from qualified abrasive, and the recovery rate is ≥95%, so as to avoid dust adhering to the workpiece and causing defects.

Anti-static design: the cabin, spray gun and pipeline are grounded to prevent electrostatic breakdown of electronic components.

4. High automation and stable batch.

PLC+touch screen, automatic feeding → sandblasting → recycling → dust removal → blanking, one person can manage multiple sets, and the efficiency is 5-10 times that of manual work.

Frequency conversion speed regulation: the swing speed of conveyor/turntable/spray gun can be adjusted, which is suitable for small parts with high speed and large parts with low speed.

Parameter curing: pressure, flow, time and angle are formulated, and the batch consistency is 0.5 μ m, so as to prevent artificial differences.

It can connect manipulator, assembly line and AGV to realize unmanned production line.

5. Wide material compatibility, suitable for electronic multi-materials.

Metal parts: aluminum/magnesium/zinc alloy die-casting shell, stainless steel terminal, copper pin, precision stamping parts.

Plastic/resin: PC/ABS, bakelite, LCP, silicone buttons, flash of injection molded parts.

Special-shaped small pieces: connector, mobile phone middle frame, notebook shell, camera decorative ring, micro gear.

6. Compact, low noise, energy saving and easy maintenance.

Small size (about 1–3 m), noise ≤75 dB, suitable for electronic workshop layout.

Boron carbide/tungsten steel for nozzles has a service life of 500-800 hours and few wearing parts.

Modular design, quick cleaning, abrasive change and tooling change, and the change time is ≤30 minutes.

Second, the key system configuration

Sandblasting system: 4-8 precision spray guns, servo swing (30), independent pressure and flow regulation.

Workpiece conveying:

Turntable: multi-station (6–12), suitable for small and medium-sized parts batch.

Drum type: tumbling sand blasting, suitable for tiny parts (screws, terminals).

Conveying type: mesh belt/belt, suitable for long strip and flat parts assembly line.

Abrasive circulation: mechanical+airflow double recovery, multi-stage screening, automatic feeding.

Dust removal system: pulse back blowing+HEPA, anti-static, dust does not overflow.

Control system: PLC+touch screen, program storage, alarm tracing and data export.

Third, typical applicable scenarios

3C case: the middle frame of the mobile phone/tablet, the panel of the notebook, and the camera ring are deburred.

Precision connector: terminal, rubber core and tiny flash at the root of PIN pin.

Injection/die casting parts: PC/ABS, bakelite, zinc alloy small parts, flash, scale.

Microstructures: gear, heat sink, shield, sensor shell.

Four, compared with ordinary sandblasting machine

form

Comparison of electronic special automatic sandblasting machine general industrial sandblasting machine

Working pressure 0.2–0.5 MPa (low pressure) 0.6–0.8 MPa (high pressure)

Abrasive particle size # 800–# 2000 (fine) # 200–# 600 (coarse)

The deburring accuracy is 0.01–0.05mm ≥ 0.1mm.

No/minimal damage to the substrate, easy to deform and scratch.

Cleanliness HEPA is dust-free, with large anti-static dust and no anti-static.

Automation The whole process is automatic, the program is semi-automatic and there are many manual interventions.

Applicable scenarios 3C, precision electronics, heavy work in clean workshop, rust removal and thick burr.

V. Key points of type selection

According to the size/shape of the workpiece, the machine type is selected: drum for small parts, turntable for medium parts and conveying type for long parts.

Pressure and abrasive: soft parts 0.2-0.3 MPa+glass beads; Hard parts 0.3-0.5 MPa+fine alumina.

Cleanliness grade: HEPA+negative pressure for Class 10000; Class 1000 is fully enclosed+antistatic.

Automation requirements: mass production selection pipeline docking; Multi-variety selection program storage+quick change.

summary

Special automatic sandblasting machine for deburring electronic products, with low-pressure precision, dust-free and clean, fully automatic closed loop, flexibility and no damage to the substrate as the core, accurately solves the pain points of tiny burrs, complex dead corners, batch consistency and cleanliness, and is the standard equipment for 3C precision manufacturing.