Doctor Blade Holder

The main function of doctor blade is to apply linear pressure along the width direction of the roll surface to keep the roll clean. The pressure of the scraper is mainly applied by the weight of the doctor blade holder itself or by selecting a suitable cylinder or torque module. The selection of different doctor blade holder and doctor blade can have different cleaning effects on different types of roll surfaces.

Doctoring Device are mainly composed of a blade body, a blade clamp, a moving device, a fixed device, etc. They are divided into self weight type, pneumatic loading type, and torque spring type according to the loading form; According to the movement mode, it can be divided into fixed and swinging types, which are respectively used for different parts of the equipment and roller surfaces of different materials.

Type of Doctor Blade Holder

1. The swinging blade holder can more effectively clean the roller surface and prevent the scraper from being pressed on the roller surface for a long time, protecting the roller surface.

2. KF doctor blade holder relies on the weight of the scraper holder itself to apply pressure to the scraper blade. Generally, manual lifting and closing of some important parts can be achieved by using a cylinder to apply line pressure and lift the blade from a distance. The self weight scraper can adjust the pressure of the blade by fine-tuning the bolts of the scraper frame.

3. Pneumatic doctor blade holder, also known as DST blade holder, is widely used in various parts of equipment rollers. It adopts a full range airbag for overall pressure, making the scraper more evenly adhere to the roll surface, which can effectively clean the roller surface, reduce breakage, and improve the service life of the roll.

Airbag type double scraper, some tiny dirt will run to the back of the scraper through the small gap between the roller surface and the doctor blade, some will be carried away by the strip tension, and some will stay on the back of the doctor blade and form blocks. When it falls off, it will cause pressure marks on the strip. At the same time, when the scraper line pressure is too high, negative pressure will be generated on the back of the blade, causing dirt to accumulate on the front of the blade, seriously affecting the quality of the paper. The dual scraper device can overcome the above disadvantages, solve problems such as line pressure, material, and angle that cannot be solved by a single scraper, ensure the cleanliness of the roller surface during operation, reduce breakage, and effectively protect the roller surface. Double scraper is mainly used for suction couch roll and press rolls.