It mainly consists of a coated back roll, a blade holder and a blade adjustment mechanism. To be precise, the metering device is accurately metered because the fountain-type loading has been well-predicted.
The blade clamping mechanism is a device that positions and clamps the coating blade in a certain size. The distance from the blade support point to the free end of the blade is the critical dimension, which is directly related to the blade angle; the blade support point is the key part, and the hardness and width must be adapted to the hardness and thickness of the blade, depending on the different ways of use of the blade. Form support point. The banner part allows fine-tuning of the pressure in the direction of the back roll. The above two points have an important influence on the stability of the feeding amount and the consistency of the feeding and the wear rate of the blade.
The blade clamping mechanism is mounted on the rotary blade beam to perform bidirectional rotation and lateral oscillation around the hinge point. Bidirectional rotation is the need to adjust the blade pressure and clean the replacement blade. The hydraulic device provides this stable and reliable pressure to the blade. The horizontal swing is to drive the scraper to make a uniform reciprocating linear motion according to a certain swing amplitude and frequency in the lateral direction of the paper web. The important function is
: 1 Reduce the local wear of the scraper (especially at the two edges of the paper), extend the life of the scraper; 2 reduce the occurrence of coated roads.
The coated back roll is an important part of the applicator head that supports the paper sheet and improves the tension of the sheet and the metering combination with the doctor blade. In high speed coating, the dynamic balance and structural stability of the roll body are important. The back roller is covered with a synthetic rubber material, which is required to be firmly bonded to the steel body. There must be no air bubbles in the coating, and the surface needs to be precisely ground. In the coating process, in order to obtain a smooth coated surface, the pressure at each point of contact between the scraper and the back roll should be constant and uniform, and have uniform elastic deformation, which requires the hardness of the back roll rubber layer to be appropriate, and the hardness of each place Poor <HS2°. Since the width of the blade in the coating is always greater than the width of the paper, the rubber surface of the back roller that is not separated by thick paper must be equipped with a highly efficient water atomizing device to protect it from being scratched by the blade.
Click here to view Previous or Next