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The coating doctor is often made of alloy tool steel with good strength and hardness. This type of doctor has high strength and hardness, and the straightness error of the blade is small. When scraping, the coating doctor is fixed and does not rotate. Pneumatic and fine adjustment mechanisms are used to adjust and control the position of the doctor. The coating amount control and scraping accuracy are high, and the use is extremely convenient. The advantage of the coating doctor is that the scraping is very uniform, suitable for precise scraping of the glue coating on the smooth roller.
Product Description
Features
The material of SUN HONG coating blade has high fatigue strength and good wear resistance. Strip steel is made of high-quality grain strength. The advantage of this steel is hardening the small grain structure and reducing the content of harmful impurity at the bottom. Therefore, it ensures the reliability and durability after heat treating and hardening during use process. Strict thickness tolerances, straightness and precise uniform slope, from 0 degree to 90 degree to ensure the shape and function of the doctor blade.
Accurate bending of SUN HONG coating blade can meet the minimum intermittent downtime. High life expectancy.
Sun Hong's coating blade can produce a uniform coating effect, thereby increasing paper production and reducing downtime.
The service life of Sun Hong's doctor blade is more than twice that of a regular doctor blade.
Maintenance
Commom problems and solutions for different types of blade wear.
| Problem | Reason | Measure |
| Uneven wear, frequent blade replacement | 1. The surface of 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 middle or edge of 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 gasket at the back of blade if necessary 2. Replace the old and sunken blade |
| Excessive wear at one end of blade | The displacement of blade is not parallel to the axial direction of roller or dryer | Add gasket, if necessary, move bearing and bracket to adjust scraper parallel to axial direction |
| The blade is worn evenly, but the end face is rough | 1. There is deposit on the surface of roller or dryer 2. The pressure of blade is too high 3. The material of blade is too hard | 1. Use abrasive blade when necessary 2. Reduce the pressure 3. Use a slightly soft blade |
| Excessive wear in sheet area | The sheet leaves sediment on the roller or dryer | 1. Use abrasive blade when necessary 2. Trim the edge of blade frequently 3. Use blade with slotted end to prevent excessive pressure on both ends of roller or dryer |
| Excessive wear out of sheet area | The sheet lubricates the roller or dryer | Use blade with 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 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 |
Packaging and Shipping
The coating doctor is often made of alloy tool steel with good strength and hardness. This type of doctor has high strength and hardness, and the straightness error of the blade is small. When scraping, the coating doctor is fixed and does not rotate. Pneumatic and fine adjustment mechanisms are used to adjust and control the position of the doctor. The coating amount control and scraping accuracy are high, and the use is extremely convenient. The advantage of the coating doctor is that the scraping is very uniform, suitable for precise scraping of the glue coating on the smooth roller.
Product Description
Features
The material of SUN HONG coating blade has high fatigue strength and good wear resistance. Strip steel is made of high-quality grain strength. The advantage of this steel is hardening the small grain structure and reducing the content of harmful impurity at the bottom. Therefore, it ensures the reliability and durability after heat treating and hardening during use process. Strict thickness tolerances, straightness and precise uniform slope, from 0 degree to 90 degree to ensure the shape and function of the doctor blade.
Accurate bending of SUN HONG coating blade can meet the minimum intermittent downtime. High life expectancy.
Sun Hong's coating blade can produce a uniform coating effect, thereby increasing paper production and reducing downtime.
The service life of Sun Hong's doctor blade is more than twice that of a regular doctor blade.
Maintenance
Commom problems and solutions for different types of blade wear.
| Problem | Reason | Measure |
| Uneven wear, frequent blade replacement | 1. The surface of 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 middle or edge of 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 gasket at the back of blade if necessary 2. Replace the old and sunken blade |
| Excessive wear at one end of blade | The displacement of blade is not parallel to the axial direction of roller or dryer | Add gasket, if necessary, move bearing and bracket to adjust scraper parallel to axial direction |
| The blade is worn evenly, but the end face is rough | 1. There is deposit on the surface of roller or dryer 2. The pressure of blade is too high 3. The material of blade is too hard | 1. Use abrasive blade when necessary 2. Reduce the pressure 3. Use a slightly soft blade |
| Excessive wear in sheet area | The sheet leaves sediment on the roller or dryer | 1. Use abrasive blade when necessary 2. Trim the edge of blade frequently 3. Use blade with slotted end to prevent excessive pressure on both ends of roller or dryer |
| Excessive wear out of sheet area | The sheet lubricates the roller or dryer | Use blade with 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 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 |
Packaging and Shipping
