HP-730 Automatic PCB Conformal Coating Machine | Automated SMT Coating System

The HP-730 Automatic PCB Conformal Coating Machine is a production-oriented automated coating system developed for manufacturers requiring stable, repeatable, and efficient conformal coating of electronic assemblies. Designed for integration with SMT and PCBA production lines, the machine combines automatic PCB transport, high-speed servo motion, programmable coating paths, precision spray and dispensing valves, and built-in process support functions.

The HP-730 is suitable for manufacturers processing high-density PCBs, mixed product models, automotive electronics, industrial control boards, BMS assemblies, communication electronics, and other electronic products requiring protective conformal coating.

The HP-730 is designed to reduce manual intervention throughout the coating process. A typical automated process includes:

• PCB Loading
• Automatic Conveying
• Positioning
• Programmable Coating
• Local Dispensing
• UV Inspection
• PCB Transfer

The integrated conveyor system allows the machine to communicate with upstream and downstream SMT equipment through a standard SMEMA interface. This makes the HP-730 suitable for standalone production cells as well as fully automated PCB coating lines.

Production coating requires both precision and movement efficiency. The HP-730 uses servo motors and precision screw modules for X, Y, and Z-axis movement. The motion system provides:

• X/Y speed up to 800 mm/s
• Z-axis speed up to 300 mm/s
• Repeat positioning accuracy of ± 0.02 mm

Fast motion reduces non-productive travel time, while precise positioning maintains the programmed coating trajectory. This combination makes the machine suitable for both relatively simple coating patterns and complex high-density PCB assemblies.

The PCB transport system is designed specifically for automated electronics manufacturing. A stainless-steel chain conveyor provides stable PCB transfer, while two independently controlled stepper motors provide controlled and reliable transportation.

The guide rail can be electrically adjusted from: 50-450 mm. This allows the machine to accommodate different PCB sizes without extensive manual mechanical adjustment.

The standard PCB transfer height is: 910 ± 20 mm, making the machine suitable for integration with common SMT production equipment.

The HP-730 standard configuration combines two different valve technologies:

• H-905 Precision Atomizing Spray Valve - For controlled coating of larger PCB areas and continuous spray paths.
• H-D01 Needle-Type Dispensing Valve - For localized point or line dispensing in specific areas.

This dual-process configuration provides additional flexibility when a PCB contains both large coating areas and localized regions requiring precise material application. It can also be configured for different coating process requirements according to the material and product design.

Different PCB designs require different coating patterns. The HP-730 software supports programmable paths for:

• Point coating
• Linear coating
• Curved coating
• Multiple tracks
• Selective coating
• Complex PCB coating patterns

Operators can program the machine through teach pendant and mouse/keyboard operation, while automatic programming through data input is also supported. This provides flexibility for manufacturers with multiple PCB models and frequent production changeovers.

As PCB designs become smaller and more densely populated, conventional full-board spraying becomes less practical. Connectors, sockets, switches, test points, heat-sensitive components, and other areas may need to remain uncoated.

The HP-730 allows coating paths to be programmed according to the actual PCB layout. The machine can selectively apply coating around components while avoiding designated non-coating areas. This makes it suitable for:

High-Density PCB + Mixed Components + Complex Keep-Out Areas

and helps manufacturers reduce unnecessary masking and manual coating operations.

For UV-visible conformal coating materials, the HP-730 includes a built-in UV inspection light source. Operators can use the integrated UV illumination to check coating coverage and identify potential areas such as:

• Missing coating
• Insufficient coverage
• Incorrect coating location
• Unwanted coating in keep-out areas

This provides an additional process verification step within the equipment.

Coating equipment must maintain stable valve performance during continuous production. The HP-730 incorporates an integrated cleaning function to simplify routine equipment maintenance and help keep the coating system ready for production.

A dedicated 2 L stainless-steel pressure tank is provided for cleaning material. The standard material supply system includes a 10 L stainless-steel pressure tank, providing practical material capacity for production applications.

The HP-730 is not limited to standalone operation. With its SMEMA communication interface, the machine can exchange production signals with other SMT equipment.

Potential line configurations include:

PCB Loader → SMT Process → HP-730 Coating → Curing → Inspection → PCB Unloader

The coating machine can therefore become part of a broader automated PCB conformal coating line.

The HP-730 can be applied across a wide range of electronics manufacturing sectors:

The HP-730 provides a balance of precision, speed, flexibility, and production automation for PCB conformal coating. Whether you operate an EMS factory, automotive electronics production line, industrial electronics plant, or new-energy PCBA facility, the machine can be configured around your PCB geometry, coating material, coating areas, and production requirements.