Abstract: In a method for disposing of waste matter such as waste tire pieces by using first and second shredding members each having shredding blades, the waste matter is introduced into a space between the shredding blades of the first and second shredding members and shredded or torn off into fine chips by operating the first and second shredding members, while partially caught by grooves formed in opposite faces of the shredding blades of the respective shredding members. By moving the first and second shredding members relative to each other in opposite directions to impart a shearing force to the waste matter in the space between the shredding blades, the waste matter is effectively torn off into pieces. When a waste tire is processed in an apparatus for practicing the method, it is successfully separated into rubber parts and wires with high efficiency.

Abstract: A guide roller apparatus has entry guide and an upper guide provided at an entrance side of an advancing path for a workpiece material to be rolled, and side rollers, upper and lower guide rollers and further tip end chips downward thereof are sequentially provided. The the workpiece is guided into grooves of rolling rollers of a rolling mill without force by the guide roller apparatus. The guide roller apparatus guides the workpiece material having a width larger than that of a caliber of the rolling roll without rolling flaw or torsion occurring in the material to be rolled.

Abstract: In a rolling method of rolling a material by front-stage rolling mill, a post-stage rolling mill and guiding rollers interposed therebetween. At first, a gap between the guiding rollers is set to a standard outer size of a standard material to be rolled by front-stage rolling rollers, and a standard embracing force formed by the guiding rollers at the gap is measured when the standard material passes therethrough. Then, a machine is operated, and a post outer size of a rolled material rolled by post-stage rolling rollers is measured. The post outer size of the rolled material is compared with a desired outer size of the rolled material. In case the post outer size of the material is smaller or greater than the desired outer size of the material, an embracing force of the guiding rollers during a rolling is compared with the standard embracing force. Then, the rollers are adjusted so that the post outer size of the material becomes the desired outer size.

Abstract: A positioning control device having a moving body engaged with a screw shaft to be moved with the rotation of the screw shaft, and a rest bar for fixing the moving body having two long positioning retainers extending in the axial direction of the screw shaft makes it possible to securely hold a guide apparatus for rolling stock. The moving body is provided on its upper portion with a shift base for mounting the guide apparatus thereon, and on its lower portion with a shift bracket. A pair of hydraulic cylinders piercing through the shift bracket are opposed to each other across the screw shaft. A piston rod in each hydraulic cylinder is movable vertically so as to come into contact with the lower surface of the retaining portion of the rest bar. Both positioning retainers are secured on the retaining portion of the rest bar and disposed opposite to each other across the piston rods and the retaining portion of the rest bar so as to come into contact with the contact members of the shift base.

Abstract: In a roller guide apparatus for guiding a steel material to be rolled into a rolling mill machine, a ratio (K/M) of an elastic constant (K [N/mm]) of the roller guide portion of a roller guide apparatus to a gradient (M [N/mm]) in a plasticity characteristic curve obtained when pressing the steel material nipped between the guide rollers in rolling is determined to be 0.5 or more, to thereby prevent the steel material from tilting between the guide rollers. As a result, dimensional accuracy in sectional shape and size of an end product can be improved, and miss-rolling can be prevented, thus producing high-quality rolled steel products without surface defects with remarkably high yield rate and productivity.

Abstract: A high-rigid type guiding device for guiding a steel material to be rolled comprises guide rollers toughened by satisfying the condition in which rigidity (K) at contact portions with the steel material is defined by:K=Fmax/Smaxwherein, Fmax represents the maximum load exerted on the guide rollers (Fmax=m.times.FT, 1.0.ltoreq.m.ltoreq.2.0), and Smax represents the maximum allowable value within a range in which increment S of a roller gap defined between the contact portions is determined (Smax=n.times..delta.1, 0.2.ltoreq.n.ltoreq.0.8). Consequently, the efficiency of rolling and the productivity of the rolled steel products can be improved, and the yielding efficiency and quality of the products can be heightened.

Abstract: A twist roller guide having a minimized overall length, including a guide box, a twist guide member having a twisted through hole for giving preliminary twist to the stock passing therethrough, and a roller holder consisting of a hollow cylindrical body portion and a pair of bearing plates extending forwardly therefrom to support a pair of twist rollers therebetween. The twist guide member consists of an enlarged head portion defining an inlet opening therein and a tubular body portion, the head portion being fitted in a bracket portion of the guide box formed adjacent to the rear end thereof. The body portion of the twist guide is fitted in the hollow cylindrical body portion of the roller holder, which is firmly supported in another bracket portion of the guide box formed adjacent to the front end thereof. The twist guide is beveled at the top and bottom of its exit end face so that it may be placed quite close to the twist rollers.

Abstract: A mechanism for automatically centering sub-guide rollers and adjusting the clearance between the sub-guide rollers thereby to adjust the clamping condition of the material to be rolled, for use in the material guiding apparatus of a rolling mill for rolling a steel blank into wires, bars and so forth, the material guiding apparatus being of a type having a pair of roller holders 2, 3 each of which carrying corresponding one of a pair of main guide rollers 4, 5 and a pair of sub-guide rollers 41, 51. Each of the sub-guide rollers is rotatably carried by corresponding one of a pair of eccentric shafts pins 26 unitary with each of a pair of support shafts 25 supported by a corresponding roller holder. A right hand screw gear 27 and a left hand screw gear 28 are attached to respective ones of the support shafts 25. A manually operable right hand screw worm 29 and a right hand screw worm 30 which is also manually operable are made to engage with the gears 27, 28, respectively.

Abstract: In a roller type stock guide of the type including, among others, a cylindrical nut member having threaded connections of opposite hands with a pair of threaded shafts and, being arranged between the two roller holder levers, operable to turn the latter in opposite directions thereby to vary the distance between the guide rollers, a ratchet type nut driving mechanism is provided which includes a ratchet wheel formed around the cylindrical nut integrally therewith, a pair of ratchet pawls movable into and out of meshing engagement with the ratchet wheel in alternate fashion under the action of a manually operable control cam, and a notching lever handle manually operable to turn the ratchet wheel and cylindrical nut in an intermittent fashion through the intermediary of either one of the ratchet pawls as placed in mesh with the ratchet wheel.