### 1. **Automatic Speed Control:**
- **Speed Up and Down Function:** The machine can automatically adjust its speed to reach a set value, ensuring consistent and precise operation.
- **Maximum Speed Limit:** There is a built-in limit to prevent the machine from exceeding a safe or desired maximum speed.
- **Manual Termination:** The automatic speed adjustment can be stopped at any point, allowing for manual control if needed.
### 2. **Coating Process:**
- **Idle and Coating States:** The system can switch between an idle state (where no coating is applied) and a coating state (where the material is being applied). This flexibility allows for better control over the process and can help in reducing waste.
### 3. **Drying Unit:**
- **Multi-Position Return Air Path:** The drying unit has multiple return air paths, which helps in creating a more uniform and efficient drying environment.
- **Cyclone Layout:** The cyclone layout on the entire surface ensures that the air flow is distributed evenly, promoting even drying.
- **Inside-Out Drying:** The system dries from the inside out, which helps in preventing the formation of bubbles and ensures a smooth, defect-free finish.
- **Automatic Constant Temperature Control:** The temperature is maintained at a constant level, which is crucial for consistent drying results.
- **High Wind Speed and Flow Rate:** The system uses high wind speeds and high flow rates to achieve effective drying at lower temperatures, which can be gentler on the coated materials.
- **Negative Pressure Design:** The entire box is designed with negative pressure, which prevents hot air from escaping and maintains a controlled environment.
### Summary:
This system is designed to provide a highly controlled and efficient coating and drying process. The automatic speed control, flexible switching between idle and coating states, and the advanced drying unit with multi-position return air paths, cyclone layout, and negative pressure design all contribute to a high-quality and reliable process. The ability to dry from the inside out and maintain a constant temperature, along with high wind speeds and flow rates, ensures that the final product is of the highest quality, free from defects like bubbles.