Product Description
The DC350 Inline Water Washing Machine is designed for automatic removal of solder balls, board debris, dust and other surface contaminants from PCBA, IC trays and transfer trays.
Unlike chemical-based PCBA washing systems, the DC350 uses DI water as the washing and rinsing medium, making it suitable for applications where water-soluble flux residues or loose process contaminants need to be removed without a chemical washing solution.
The machine integrates DI water washing, multi-stage DI water rinsing, cold-air knife drying and hot-air drying into one continuous conveyorized process. Products enter from the loading end and are transported through each process section at a controlled conveyor speed before being discharged dry and ready for the next production step.
The washing section uses high-volume upper and lower spray nozzles to provide effective coverage across the product surface. Water pressure can be adjusted according to the product and process requirements.
After washing, the product passes through three DI water rinsing stages to remove remaining contaminants and washing water. The final cold-air knife section removes surface water, followed by hot-air drying to reduce residual moisture before discharge.
The DC350 can be connected with board loaders, unloaders, conveyor transfer systems and other upstream or downstream equipment to form a continuous automated washing line.
Process Flow
Loading → Water Vapor Isolation → DI Water Wash → DI Water Rinse 1 → DI Water Rinse 2 → Final DI Water Rinse → Air Dry→ Hot-Air Knife Dry → Unloading
Working Principle
During operation, the product is transferred onto the conveyor and moves through the washing, rinsing and drying sections at the preset conveyor speed.
In the DI water washing section, high-volume spray nozzles direct water onto the upper and lower surfaces of the product. The spray force removes loose contaminants such as solder balls, board debris and dust.
The product then enters the multi-stage DI water rinsing section. Three rinse stages provide additional removal of residual contaminants and washing water before the final drying process.
Adjustable air knives remove water from the product surface before it enters the hot-air drying section. Heated air removes remaining moisture and prepares the product for transfer to the next production process.
Main Applications
The DC350 is suitable for applications requiring water-based washing of electronic assemblies and production trays.
Typical applications include:
- PCBA with water-soluble flux
- IC trays
- IC transfer trays
- Semiconductor packaging trays
- PCB and PCBA assemblies
- Solder ball removal
- Board debris removal
- Dust removal
- Post-process tray washing
- Automated SMT production lines
Key Features
- DI water washing and rinsing without a chemical washing solution.
- High-volume spray washing for removal of solder balls, dust and loose process debris.
- Upper and lower spray nozzles provide washing coverage on both sides of the product.
- Adjustable spray pressure for different product types and process requirements.
- Three-stage DI water rinsing for effective removal of residual contaminants.
- Adjustable air-knife pressure for efficient surface water removal.
- Adjustable upper air-knife height and angle for process optimization.
- DI water resistivity monitoring system for incoming water quality control.
- Real-time water and air pressure gauges for process monitoring.
- PC + PLC control with touchscreen operation.
- English and Chinese operating interface.
- SMEMA interface for communication with upstream and downstream equipment.
- MES communication software available as an option for machine status monitoring.
- Energy-saving mode for reduced utility consumption during standby.
- Automatic product detection and counting at the machine inlet and outlet.
- Timeout detection and alarm for abnormal product transfer conditions.
- Automatic standby function during idle periods.
- SUS304 stainless steel construction with TIG welding for corrosion resistance and structural durability.
- Double-layer liquid protection in the washing and rinsing sections to minimize leakage.
- Double-layer protection in the heating section with built-in thermal insulation.
- Emergency stop switches at the inlet, outlet and operating panel.
- Multiple electrical, temperature, water-level and leakage protection functions.
Machine Structure
The DC350 consists of four main functional sections:
1. Water Vapor Isolation Section
The water vapor isolation section helps limit water vapor migration between the washing area and the surrounding production environment, supporting cleaner operation around the machine.
2. DI Water Washing Section
The washing section uses high-volume spray nozzles positioned above and below the conveyor. Spray pressure can be adjusted according to the product and washing requirements.
The section is primarily used to remove solder balls, board debris, dust and other loose contaminants from PCBA and tray surfaces.
3. DI Water Rinsing Section
The rinsing section includes three stages:
- DI Water Rinse 1
- DI Water Rinse 2
- Final DI Water Rinse
Multiple rinsing stages help remove remaining contaminants and washing water from the product before drying.
A DI water resistivity monitoring system is provided to monitor incoming DI water quality.
4. Air Drying & Hot-Air Drying Section
After the final rinse, cold-air knives remove water from the product surface. The product then passes through the hot-air drying section to remove remaining moisture.
The air-knife pressure, upper air-knife height and angle can be adjusted according to the product geometry and drying requirements.
Technical Specifications
| Item | Specification |
|---|---|
| Maximum Product Size | 600 × 80 mm (W × T) |
| Conveyor Width | 600 mm |
| Conveyor Speed | 0.1–1.5 m/min |
| Conveyor Direction | Left to Right |
| Conveyor Height | 950 ± 25 mm |
| Theoretical Washing Capacity | Conveyor Width × Conveyor Speed × Time (m²) |
| Washing Temperature | Room Temperature–70°C |
| Rinse 1 Temperature | Room Temperature–70°C |
| Rinse 2 Temperature | Room Temperature–60°C |
| Rinse 2 Inlet Water Temperature | Up to 60°C |
| Drying Temperature | Room Temperature–100°C |
| DI Water Supply | 6–12 L/min |
| DI Water Supply Points | 3 |
| Exhaust Port | Ø250 mm |
| Exhaust Air Volume | 30 m³/min |
| Total Power | 85 kW |
| Power Supply | AC 380 V, 50/60 Hz |
| Compressed Air Supply | 0.5–0.7 MPa, 200 L/min |
| Machine Dimensions | L3500 × W1860 × H2000 mm |
| Machine Weight | Approx. 2200 kg |
Note: RT = Room Temperature.
Control & Monitoring
The DC350 uses an IPC + PLC control system with touchscreen operation. The software and operating interface are available in English and Chinese.
Standard monitoring and control functions include:
- DI water resistivity monitoring
- Washing water pressure monitoring
- Air pressure monitoring
- Water tank temperature monitoring
- Hot-air temperature monitoring
- High and low water-level protection
- Automatic leakage detection
- Product entry and exit detection
- Product counting
- Timeout detection and alarm
- Energy-saving standby mode
- Emergency stop protection
- SMEMA communication interface
Safety Protection
The DC350 is equipped with multiple protection systems for safe and stable operation:
- Main power leakage protection
- Phase-loss protection
- Phase-sequence protection
- Electrical overcurrent protection
- Electrical overload protection
- Electrical surge protection during startup
- Water tank over-temperature protection
- Hot-air over-temperature protection
- High and low water-level protection
- Automatic water leakage detection
- Emergency stop buttons at the machine inlet, outlet and control panel
- Machine grounding resistance below 1 Ω
- Machine surface voltage below 50 V
- Double-layer leakage protection for washing and rinsing sections
- Double-layer protection and thermal insulation for the heating section
Automation & Production Line Integration
The DC350 is designed for integration into automated manufacturing lines.
The standard SMEMA communication interface allows the machine to exchange production signals with upstream and downstream equipment.
Depending on the production layout, the DC350 can be integrated with:
- Board loaders
- Board unloaders
- Conveyor transfer systems
- SMT production equipment
- Tray handling systems
- Semiconductor packaging equipment
- Other automated material handling systems
MES interface software is available as an option for machine status and production monitoring.
Construction
The machine body is manufactured from SUS304 stainless steel. The main structure uses TIG welding to provide corrosion resistance, mechanical strength and a clean industrial appearance.
The washing and rinsing sections feature double-layer protection to reduce the risk of water leakage. The heating section also uses double-layer protection with built-in thermal insulation to reduce heat loss and improve operator safety.
