| Customization: | Available |
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| After-sales Service: | Online and at Site Support |
| Warranty: | Standard Seaworthy Package |
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Paper Machine Doctor Blade
Leizhan provides a comprehensive portfolio of doctor blades designed for every machine position and process requirement. Continuous material testing and blade development ensure the reliability and superior quality of our products.
Our blades are systematically categorized by core functionality:
Economy Line: Delivers exceptional value, meeting today's demanding quality standards at highly competitive prices.
Durability Line: Engineered for maximized longevity and extended blade life.
Performance Line: Features blades with specific superior advantages-such as low friction, high heat resistance, or enhanced cleaning capabilities.
| Problem | Reason | Measure |
| Uneven wear, frequent blade replacement | 1. The surface of the roller or dryer is uneven 2. The doctor holder is damaged or dirty 3. Sediment |
1. Use a softer blade 2. Clean, repair, or replace the doctor holder 3. Use abrasive blade |
| Excessive wear on the middle or edge of the blade | 1. The blade is not installed on the top of the roller 2. The old blade sinks (or leaves) the roller or dryer |
1. Refit or add a gasket at the back of the blade if necessary 2. Replace the old and sunken blade |
| Excessive wear at one end of the blade | The displacement of the blade is not parallel to the axial direction of the roller or dryer | Add gasket, if necessary, move bearing and bracket to adjust scraper parallel to the axial direction |
| The blade is worn evenly, but the end face is rough | 1. There is a deposit on the surface of the roller or dryer 2. The pressure of the blade is too high 3. The material of the blade is too hard |
1. Use an abrasive blade when necessary 2. Reduce the pressure 3. Use a slightly soft blade |
| Excessive wear in the sheet area | The sheet leaves sediment on the roller or dryer | 1. Use an abrasive blade when necessary 2. Trim the edge of the blade frequently 3. Use a blade with a slotted end to prevent excessive pressure on both ends of the roller or dryer |
| Excessive wear out of sheet area | The sheet lubricates the roller or dryer | Use a blade with a slotted end |
| Local depression | The blade is damaged, electrostatic (discharge/ electrolysis /heating) | Insulate the blade from the holder or use a non-metallic blade |
| The blade produces a burr | 1. The material of the blade is too soft 2. The pressure is too high 3. The angle of the blade is too small |
1. Use a slightly hard scraper 2. Reduce the pressure 3. Adjust the bearing or bracket to increase the angle, and use the instrument to check and correct the angle |
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