SU1245440A1 - Apparatus for mincing rubber - Google Patents

Description

The invention relates to the technology of grinding and recycling rubber waste, in particular to the technology of processing waste from the shoe industry.

The purpose of the invention is to reduce energy consumption.

FIG. 1 shows the proposed device, a general view; in fig. 2 - the interaction unit of chopping drums with rubber.

The device consists of two gripping drums 1, made in the form of driving gear gears (not shown), guided spacers 2, grinding drums 3 and 4, filter grille 5, collection 6 of the crumb, mechanism 7 clearance adjustment. In order to reduce the clogging of the surface of the drum 4, the guide vane matching with this drum must have a small sharpening angle (Fig. 2, point A). All elements of the device are mounted in the housing 8. The device operates as follows.

The grippers are taken from the bunker; the drums 1 feed pieces of rubber into the crater of the spacer 2, from where they enter the grinding zone B. (Fig. 2). The grinding drums rotate in one direction so that each drum in the grinding zone moves the hydraulic fluid relative to each other in opposite directions. The diameter of the drum, the abrasive surface of which is displaced in the direction of rubber supply, is absorbed 1.2-1.5 times the diameter of another grinding drum, and the angular velocity of the drum with a larger diameter is 2-5 times greater

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0 j p

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the angular velocity of the smaller chopping drum.

Rotation of the crushed drums in one direction provides an increase in the path of interaction between the element of the grindable rubber and the abrasive section of the drum and the creation of additional tensile stresses in the crushed rubber zone, which manifests itself in a decrease in the intensity of the crushing. This rotation changes the trajectory of the grinding of rubber sections to rotary-translational and allows for an increase in the aazor between the grinding drums. This leads, without an increase in the dispersion of the crumb, to an increase in the grinding capacity and, due to a decrease in the volumetric pressure in the grinding zone, to a decrease in energy intensity.

Large: the diameter of the indicated drum and the high angular speed of its rotation are necessary for maximum performance. Water is cooled, the values are fed, as in other known devices, to the grinding zone. The mechanism for adjusting the gap 7 is necessary for grinding the dispersion of the resulting chips, as well as selecting the optimal grinding modes (maximum performance is ensured by joint adjustment of the gap and the ratio of the rotational speeds of the grinding drums). The finished crumb is collected in the collector 6 or transported to the next operation. The abrasive (grinding) surface of the grinding drums can be made from abrasive cloths or made in the form of metal brushes.

Fm.2

VNIIPI Order 3947/9 Circulation 640

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Prolzp.-polngr. pr-tie, Uzhgorod, st. Project, 4

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Claims (2)

. one . DEVICE FOR GRINDING RUBBER, comprising drive grinding drums mounted in the housing with the possibility of rotation at different speeds, characterized in that, in order to reduce energy consumption, grinding grinding drums are mounted for rotation in one direction, the diameter of the drum, the rotation direction of which coincides with the feed direction rubber, larger than the diameter of another drum. 2. The device according to p. 1, about t l lichalas in that the ratio No. FIG. one GO * * 4 * angular velocity of the smaller grinding drum.