3results about How to "Increase meshing force" patented technology

The invention relates to a preparation method of paper, in particular to a preparation method of breathable paper applied to a packaging material. Chitosan and oxidized sodium alginate are subjected to a Schiff base reaction, so that a more open and loose coating layer is formed on the fiber surface, gas circulation is facilitated, and the air permeability of the paper is improved to a certain extent. And a covalent bond formed by Schiff base reaction enhances the binding force between chitosan and oxidized sodium alginate, so that the coating layer is more firmly attached to the surface of wood pulp fiber. The enhanced binding force is favorable for improving the mechanical properties such as tensile strength and breakage resistance of the paper, and an imine bond generated by the Schiff base reaction has higher chemical stability and can resist the influence of changes of external environments such as humidity, temperature and the like on the coating layer, so that the long-term stability of the performance of the paper is kept.

The utility model discloses a threaded sleeve with an expansion function, relates to the technical field of threaded sleeves, and aims to solve the problems that threaded connection between the threaded sleeve and a base material possibly becomes loose gradually and even the threaded sleeve falls off from a prefabricated hole when the threaded sleeve is affected by factors such as vibration, impact load, severe temperature change or material creep for a long time. Comprising a screw sleeve body, the screw sleeve body comprises a self-tapping section and an expansion section, the top surface of the self-tapping section is provided with the expansion section for preventing falling and loosening, and the outer wall of the expansion section is provided with a plurality of groups of notches for assisting the expansion section to change the radius; according to the design of the expansion section, the inner groove in the inner wall and the notches in the screw flights are matched with the effect of a subsequent installation tool, radial expansion of the expansion section can be achieved, and the expansion section is in tight interference fit with the inner wall of a screw hole after the thread sleeve body is completely installed in place.

This invention relates to the field of bearing ring heat treatment equipment, specifically disclosing a salt cleaning machine and bearing ring heat treatment equipment, comprising: a housing, a base inside the housing, a conveying mechanism on the base, the conveying mechanism including a transmission chain, a lower cleaning pipe assembly on the lower part of the side wall of the housing, multiple spaced support assemblies mounted on the transmission chain, the lower cleaning pipe assembly including a lower cleaning pipe located below the transmission chain, multiple self-adjusting mechanisms on the lower cleaning pipe, each self-adjusting mechanism including a movable plate that divides the lower cleaning pipe into independent upper and lower cavities, a rotating wheel at the lower part of the movable plate in contact with the movable plate, a transmission shaft at the center of the rotating wheel, a lever at the end of the transmission shaft, a first through hole at the end of the movable plate, a first nozzle on the lower cleaning pipe located at the first through hole, and a horizontal plate above the end of the movable plate with a second through hole. This invention reduces cleaning fluid waste and improves cleaning efficiency.