The invention relates to an impact crusher having a crusher unit (20), which has an impact rotor (30), wherein the impact rotor (30) bears at least two impact bars (35), wherein the impact bars (35) having a radially outer end (35.1), wherein the radially outer end (35.1) of at least one of the impact bars (35) forms an impact circle (K), wherein at least one impact rocker (41, 42) is assigned to the impact rotor (30) such that, in an operating position, a crushing gap is formed between the impact circle (K) and a crushing section (41.6) of the impact rocker (41), wherein for setting the crushing gap, first the crushing section (41.6) of the impact rocker (41) is adjusted by means of an actuating unit (50) in a feed direction by a first adjustment value such that it contacts a contact point of the impact bar (35), in particular the radially outer end and/or the impact circle, wherein the first adjustment value is compared to a first reference value in a controller, and wherein the crushing section (41.6) is adjusted by a predetermined gap dimension to create the crushing gap, To be able to determine the wear of both the impact bars (35) and the impact rocker (41) in such an impact crusher in a simple manner, provision is made according to the invention that in an additional measurement step the crushing section (41.6) is brought into contact with a reference measurement section (36.1) and in doing so, a second adjustment value is determined and compared to a second reference value.

Methods for producing a purified wheat embryo product are disclosed. In one embodiment, producing a purified wheat embryo product includes the steps of: accelerating a plurality of wheat berries toward an impact surface, impacting each of the plurality of wheat berries against the impact surface, dislodging at least some of the wheat embryos from the wheat berries in response to the impacting step such that the dislodged embryos are intact, and separating the dislodged wheat embryos from the bran and the endosperm to produce an intermediate purified wheat embryo product.

An apron return assembly having a pump that is adapted to convey a fluid, an apron actuator having an apron actuator cap side and an apron actuator rod side and being in fluid communication with the pump, an accumulator that is in fluid communication with the apron actuator cap side, a reservoir that is in fluid communication with the apron actuator, and a tension rod having a frame end and an apron end. In the preferred apron return assembly, the apron actuator and the tension rod are adapted to move the apron between a closed position and an open position. A method for moving the apron from the open position to the closed position.

A crushing device includes a horizontal shaft impact crusher having an impeller rotating around a horizontal shaft and at least one curtain against which material may be crushed. The crushing device further includes a first feeding device for feeding a first type of material to be crushed to a crushing chamber of the horizontal shaft impact crusher. A second feeding device feeds a second type of material, having a smaller average particle size than the first type of material, to the crushing chamber simultaneously with the first feeding device feeding the first type of material to the crushing chamber. A mixing arrangement for at least partially mixes the first and the second types of materials with each other before bringing them into contact with the impeller.

An apparatus including a rotor position detection unit with a sensor configured to detect an angular position of a rotor of a horizontal shaft impact crusher, the rotor having attached thereon a group of hammers. A motor control system is configured to change the rotation speed of the rotor and an automation and control system is configured to control the motor control system in response to the detected angular position of the rotor. The rotor position detection unit is configured to detect a first and second angular position of the rotor corresponding to a first and second position of a hammer of the group of hammers attached to the rotor. The motor control system comprises a frequency converter and a brake configured to enable the stopping of the rotor.

A bi-directional rotation feed roller for tree processing devices preferably includes a drive wheel, a drive disc, a plurality of reinforcement rings and a plurality of reinforcement plates. The drive wheel includes a drive cylinder and a plurality of media engagement thumb nails attached to the drive cylinder. The plurality of media engagement thumb nails are preferably arranged in a plurality of rows. A side wall of the plurality of media engagement thumb nails are preferably angularly offset from a lengthwise axis of the drive plate. The drive disc is attached to the drive wheel in substantially a middle of a with thereof. The plurality of reinforcement rings are attached to an inner perimeter of the drive wheel. The plurality of reinforcement plates are attached to an inside perimeter of the drive wheel between the drive disc and one end of the drive wheel.

An apparatus including a rotor position detection unit with a sensor configured to detect an angular position of a rotor of a horizontal shaft impact crusher, the rotor having attached thereon a group of hammers. A motor control system is configured to change the rotation speed of the rotor and an automation and control system is configured to control the motor control system in response to the detected angular position of the rotor. The rotor position detection unit is configured to detect a first and second angular position of the rotor corresponding to a first and second position of a hammer of the group of hammers attached to the rotor. The motor control system comprises a frequency converter and a brake configured to enable the stopping of the rotor.

An impact crusher for mineral material includes a crusher housing, a reversible rotor arranged in an impact-grinding space of an impact mechanism for propelling mineral material against wear members in the crusher housing; and an adjustment installation setting a spacing of the impact mechanism from the rotor. An upper impact space adjoins the impact-grinding space at the top and has an entry opening for the mineral material. The upper impact space has an upper height region that neighbors the entry opening, a central height region that adjoins the upper height region, and a lower height region that is contiguous to the lower impact-grinding space, with the central height region being a region having a largest internal width and at a widest location thereof, which is above a crushing circle of the rotor, has a maximum width which is larger than a diameter of the crushing circle of the rotor.

An apron assembly comprising an apron mounted to the crusher and adapted to be moved between an operating position and an open position, a tension rod operatively attached to and disposed between the shock absorber mount and the apron, a spring seat mounted to the crusher and adapted to be moved between a raised position and a lowered position, a spring operatively disposed between the tension rod base and the spring seat, an actuator mounted to the crusher and the spring seat and adapted to be moved between a retracted position and an extended position, a shock absorber operatively attached to and disposed between the spring seat and a shock absorber mount. The shock absorber reduces the pressure applied to the actuator. A method for controlling the opening in a crusher comprising providing an apron assembly and moving the shock absorber between a retracted position and an extended position.

A method of determining wear of a rotary impact crusher includes adjusting the position of an impact rocker relative to an impact rotor with an actuator by a first adjustment value until a crushing section of the impact rocker contacts an impact bar or an impact circle of the impact rotor. The first adjustment value is compared to a first reference value to make a first comparison corresponding to total wear of the impact rocker and the impact bar. The position of the impact rocker is adjusted relative to the impact rotor by a second adjustment value until the impact rocker contacts a reference measurement section. The second adjustment value is compared to a second reference value to make a comparison corresponding to wear of the impact rocker.