Views: 1 Author: Site Editor Publish Time: 2022-03-03 Origin: Site
The scraper in the paper machine is generally composed of scraper seat, scraper holder, pressurizing/lifting device, swing device, scraper blade, etc., as well as auxiliary parts such as bearings and journals
The hardness of the scraper holder must be calculated, designed and produced very strictly. This structure requires that the scraper holder and the blade can be supported in the proper position. The scraper holder used in the wet end must be plated with high quality stainless steel or directly made of stainless steel to prevent corrosion. , For the scraper holder used in the dryer section, the painted carbon steel construction is sufficient.
At the same time, the paper machine also needs to design the cross section of the scraper seat according to the different width of the paper machine. For a complex triangular or quadrangular section welding, any angle must ensure that the overall deviation is not greater than 12mm. The scraper holder also includes different structures depending on the location of use. For example, in the scraper used for steering rolls and some press rolls, shovels, white water collection trays and pipes are also the main components.
The paper machine doctor blade holder is the part that keeps the doctor blade in its operating position. The doctor blade holder must be of suitable design, so that the blade can be easily and quickly inserted and moved, and the doctor blade can be fixed in place. There are many types of scrapers, two of which are commonly used. One is a rigid type knife, which cannot be automatically adjusted when the contact surface changes after being fixed. The second type is the flexible or self-adjusting tool holder. This structure can be automatically adjusted when the position of the paper machine scraper seat changes or the pressing pressure changes.