METHOD FOR GRINDING COLLAGEN-CONTAINING MEDIA AND A TOOL FOR ITS IMPLEMENTATION Russian patent published in 2023 - IPC B02C13/28 C14B13/00 

FIELD: waste recovery industry.

SUBSTANCE: group of inventions can be used in machines for grinding leather waste into secondary dispersed shavings in the production of multicomponent composite and leather-like materials. The method for grinding collagen-containing media includes successive cutting of fibers while penetrating into the fibrous structure of the cutting tool blades associated with the working body, separating the dispersed particles from the crushed mass of the structure when the blades exit from it. Moreover, each tool of the working body, in addition to their joint rotation, is given a degree of mobility around its own axes located equidistant from the axis of rotation, and pulsations of the speed of rotation of the working body are reported. The tip, with blades emanating from it, of each two-blade impact-cutting tool, in addition to the portable speed ω of rotation in a rotating spatial coordinate system with the centre О_О is first additionally exposed to the maximum possible value of the tangential component of instantaneous acceleration . The tip is moved to the maximum distance l_max in the radial direction from the centre of rotation of the cutting tool, and at this moment it is penetrated into the intercollagen space by a blow, pushing apart, and cutting the fibers of the medium with the blades in the direction of impact. Then this value of instantaneous acceleration is reduced, redistributing in favour of the largest normal acceleration component , continuing to cut the fibres with the blades, but in the radial direction to the centre of rotation of the tool up to l_min, thereby creating the so-called sliding cutting. The top with converging tool blades is removed from the array of the ground medium, cutting its fibres. At the same time, the dispersed particle is separated from the array by the outlet vertex, and the hodograph describes the spatial movements of the vertex with the cutting blades of each tool, simulating the movement of the "cat's claw" from the moment of their impact-cutting penetration to the separation of the dispersed particle. The method implementation tool includes a cutting part and a holder. The shape of the body of the cutting part with the "cat's claw" configuration is made in the form of at least two concave curvilinear cutting edges emanating from one vertex, between which a longitudinal curvilinear chip groove is enclosed, and the outer non-working rear surface of the cutting part is made convex, smoothly transitioning into a rectangular holder profile. Moreover, at the end of the holder there is a base mounting hole, the axis of which is perpendicular to the longitudinal axis of the chip groove.

EFFECT: increasing the efficiency of the process of grinding collagen-containing materials.

2 cl, 19 dwg