Abstract: A belt conveyor comprising a telescopic frame (1), an endless conveyor belt (9) which is supported by idlers (12) connected to the frame (1), a drawing drum (10), and a tilting drum (11), via which the conveyor belt (9) is arranged to run, and an actuator (14) mounted to the frame (1) for changing the length of the frame (1). The frame of the belt conveyor comprises frame blocks (5a, 5b, 5c, 5d, 5e, 5f, 5g) installed to each other in a slidable manner and a lattice mechanism (20) installed to them in a pivotal manner to effect a change in the length of the belt conveyor as a result of the operation of the actuator (14). The frame blocks (5a, 5b, 5c, 5d, 5e, 5f, 5g) comprise at least one frame pipe (2a, 2b, 2c, 2d, 2e, 2f, 2g, 3a, 3b, 3c, 3d, 3e, 3f, 3g), wherein at least one frame block (5a, 5b, 5c, 5d, 5e, 5f, 5g) comprises a supporting beam (4a, 4b, 4b? 4c, 4d, 4d?, 4e, 4f, 4g) connected to at least one frame pipe (2a, 2b, 2c, 2d, 2e, 2f, 2g, 3a, 3b, 3c, 3d, 3e, 3f, 3g).

Abstract: A method and apparatus are disclosed for measuring and monitoring the setting of a crusher, in which method the erosion of the wearing parts of the crusher are monitored by sensors capable of transmitting the measurement data to the crusher's automatic control system. Based on the received measurement data, the control system adjusts the crusher setting so as to maintain the setting at its predetermined value irrespective of the erosion of the crusher's wearing parts. The invention also relates to alternative embodiments of wear sensors for the wearing parts of a crusher. The measurement data indicating the amount of erosion in the wearing parts is transmitted wirelessly to the exterior side of the crusher.

Abstract: A hydraulically adjustable cone crusher and a axial bearing assembly of a cone crusher, which crusher comprises an hydraulic adjustment cylinder/piston assembly mounted in the space formed between the crushing head and the upper surface of the main shaft for adjusting the setting of the crusher. The pressure medium of the hydraulic adjustment system of the crusher is supplied to the pressure medium space formed, except by the adjustment cylinder/piston assembly, also by at least one bearing element.

Abstract: A refiner disk sensor (78) and sensor refiner disk (58) for use in sensing or measuring a parameter in a refining zone of a refiner (30). The sensor includes a spacer (114) that isolates a sensing element. In one embodiment, the spacer is made of a material that isolates the element from the disk to prevent disk heat from affecting sensor operation. The sensor preferably also includes a housing (140) carried by the spacer that, in turn, carries the element. Where the element is temperature sensing, the housing is thermally conductive and it an the spacer enclose the element. Each sensor is disposed in the refining surface of a disk. In one embodiment, each sensor preferably is disposed in its own separate bore (96) in the disk flush with or below axial refiner bar height. In another embodiment, the sensor or sensors are part of a removable disk segment (32).

Abstract: The invention relates to a method for controlling a screening machine comprising at least one screen surface, feeding means that feed material to be screened towards the screen surface and onto the screen surface (6a) where the material is separated into a first fraction remaining on the screen surface and into a second fraction passed through the screen surface while the material is moving along the screen surface (6a). In the method, the amount of material on the screen surface is determined by automatic measurement, and the speed of the feeding means (5) is controlled on the basis of die measurement by automatic control (C).

Abstract: A transport locking arrangement is disclosed for a vibrating feeder of a mobile crushing unit, the transport locking arrangement utilizing the downward rotatable sidewalls of the feeder hopper of the vibrating feeder that are hingedly mounted on the framework of said crushing unit, whereby the sidewalls in their lower position are adapted to lock the vibrating feeder substantially rigidly to the framework of the crushing unit. The invention offers a rapid and easy technique of transport locking for a vibrating feeder.

Abstract: Feeder hopper for a movable mineral material processing device, whose walls are arranged to be turned upward to a working position, and which are locked into said working position. To lock the walls, there is at least one locking means in connection with them, said locking means containing at least a locking member and transfer means. According to the method the locking member is transferred to the locking position with the transfer means.

Abstract: A method for mounting a jaw die plate of a jaw crusher detachably against a front end wall of the crusher by means of a fastening device operated from outside a side wall of the crusher. The die plate is secured in its place by means of friction between the fastening device and a counter surface of the front end wall and friction between the fastening device and a counter surface of the die plate. The fastening device of the jaw crusher includes a wedge piece having a first pressing surface to be fitted against the counter surface of the die plate secured against the front end of the crusher, and, in addition to that, a second pressing surface to be fitted against the counter surface of the front end wall. The wedge piece is movable towards both counter surfaces and away from the same by means of the tightening means.

Abstract: Malfunctions of sliding bearings of cone crushers used in crushing stone are anticipated by providing sensors in connection to bearing parts, by means of which sensors it is possible to observe increases in friction forces. A beginning bearing damage can be detected by means of sensors at such an early stage, that extensive damage to bearings and to other parts of the crusher can be prevented.

Abstract: A belt conveyor frame and methods for manufacturing the same are disclosed, the cross section of the sidewall of the belt conveyor frame having at least two bends made thereto in two successive angles of opposite direction, whereby the sidewall cross section has essentially the shape of letter S or Z.

Abstract: A crusher comprises a main shaft a portion of which is disposed in a bore of a rotatable eccentric shaft, the main shaft (1) having a central axis that is inclined with respect to the axis of rotation of the eccentric shaft, and a first crushing head attached to the main shaft and rotatable by the main shaft with respect to a second crushing head so that constrained stroke motion is effected between the first crushing head and the second crushing head. The inclination of the central axis of the main shaft is changed with respect to the axis of rotation of the eccentric shaft by a gear transmission comprising cog wheels, such that the magnitude of the constrained stroke motion changes.

Abstract: A crusher comprises a main shaft a portion of which is disposed in a bore of a rotatable eccentric shaft, the main shaft (1) having a central axis that is inclined with respect to the axis of rotation of the eccentric shaft, and a first crushing head attached to the main shaft and rotatable by the main shaft with respect to a second crushing head so that constrained stroke motion is effected between the first crushing head and the second crushing head. The inclination of the central axis of the main shaft is changed with respect to the axis of rotation of the eccentric shaft by a gear transmission comprising cog wheels, such that the magnitude of the constrained stroke motion changes.

Abstract: A method for mounting a jaw die plate (9) of a jaw crusher detachably against a front end wall (10) of the crusher by means of a fastening device (18) operated from outside a side wall (7) of the crusher. The die plate (9) is secured in its place by means of friction between the fastening device (18) and a counter surface (22) of the front end wall (10) and friction between the fastening device (18) and a counter surface (23) of the die plate. The fastening device of the jaw crusher includes a wedge piece (18) having a first pressing surface to be fitted against the counter surface (23) of the die plate (9) secured against the front end (10) of the crusher, and, in addition to that, a second pressing surface to be fitted against the counter surface (22) of the front end wall. The wedge piece (18) is movable towards both counter surfaces (23, 22) and away from the same by means of the tightening means (19, 24, 20).