Kabushiki Kaisha Kobe Seiko Sho

Kobe Steel, Ltd.

Other

Kobelco Stewart Bolling, Inc.

Ko Takakura

Norifumi Yamada

Kimio Inoue

Kashiro Ureshino

Yoshinori Kurokawa

Masao Murakami

Masaki Naoi

Itaru Amano

Katsumi Ichikawa

Takumi Mizokawa

Tatsuya Tanaka

Toru Nishikawa

Takuzo Iwata

Takeshi Hatanaka

Yasuo Morita

Yajun Zhang

Akio Koro

A kneading apparatus includes a barrel having a cylindrical chamber; a screw assembly rotating in the chamber so that a material to be kneaded is extruded in the axial direction by the rotation, the screw assembly including a screw section having helical blades and a kneading blade section in order to allow the material to flow into the clearance between the inner wall of the chamber and the kneading blade section, and to apply shearing forces to the material; a metering feeder for feeding the material at a substantially constant volumetric or gravimetric rate into the chamber; an injecting device for injecting a heat-removing medium into the chamber; and a discharging device for separating the heat-removing medium from the material and discharging the heat-removing medium from the chamber. A kneading method using the kneading apparatus is also disclosed.

Kneading apparatus and method for kneading rubber-based composition using the same

A batch mixer having a barrel which forms a cylindrical sealed chamber having a section consisting of two mutually communicated circles, and two rotors housed in the chamber to mix a mixing material by rotation, at least one of the inner wall of the barrel and the surface of the rotor having a plurality of recessed parts or protruding parts. The recessed parts or protruding parts are formed of grooves or projections extended in the direction crossing to the rotating direction of the rotor rotated in the chamber to mix the material. According to this structure, a batch mixer excellent in the controllability of material temperature during mixing can be provided.

Batch mixer

Each mixing rotor for a batch mixer is rotatably insertable into a mixing chamber such that tip clearances are defined between tips of mixing blades and an inner surface of a mixing chamber and is provided on its outer circumferential surface with a plurality of mixing blades for imparting shearing forces to a material to be mixed by causing the material to pass through the tip clearances. The plurality of mixing blades include a nonlinear blade which is substantially nonlinear from a start point to a terminal point in a development of the mixing rotor developed into a plane about its longitudinal axis, and other linear blades which are linear in the development and whose helix angle to the longitudinal axis of the mixing rotor is set at 15 to 35&deg;. An appropriate mixing control capable of realizing both sufficient mixing and sufficient dispersion can be executed by mixing and dispersing the material in a well-balanced manner by means of the mixing rotor.

Batch mixer and a mixing rotor for the same

An enclosed kneading apparatus which can smoothly knead and disperse kneaded products of various kneading conditions without the maintenance of a rotor moving mechanism for a first and second rotors and the operation which sacrifices the handling capacity of the kneading apparatus and at the same time, prevent an excessive increase in the temperature of the kneaded products. In the apparatus, the kneaded product of a desired kneading state is obtained by flowing a kneading object in tip clearances between the inner wall of a chamber and a first and second rotors while rotating the first and second rotors in the chamber, and by imparting a shearing force to disperse the kneading object. The respective first and second rotors are provided with three long wings in helical fashion each having a plurality of tip portions for providing a plurality of three tip clearances in the axial direction.

Enclosed kneading apparatus

Hermetically closed kneading apparatus

An internal mixer and controller enables the phase difference and the speed ratio between two rotors to be changed without stopping the operation of the mixer. The internal mixer comprises: nonintermeshed first and second rotors disposed in a mixing chamber; first and second drive units; first and second phase measuring devices; first and second speed measuring devices; and a control unit for controlling the first and second drive units on the basis of signals from the first and second speed measuring devices and signals from the first and second phase measuring devices. The control unit controls the two rotors so as to synchronously rotate at the same speed on the basis of the signals from the speed measuring devices when the two rotors fixedly rotate at the same speed. When the phase difference between the two rotors is changed, the control unit calculates the phase difference from the signals from the phase measuring devices, compares the calculated phase difference with a set phase difference, and controls the second drive unit to change the speed of the second rotor, thereby changing the phase. When the phase difference is equal to the set phase difference, the control unit again controls the two rotors so as to synchronously rotate at the same speed on the basis of the signals from the speed measuring devices. When the two rotors are rotated at different speeds, the control unit controls the drive units so that the speed of each of the rotors is equal to the set speed, respectively, on the basis of the measured speed from speed measuring devices.

Internal mixer

An internal mixer having a floating weight disposed in contiguous with an internal mixer main body and made elevatable in a hopper to which a material to be mixed is charged, wherein a hydraulic cylinder for elevating the floating weight is disposed in contiguous with the internal mixer main body, a pneumatic/hydraulic pressure conversion means for pressure conversion between a hydraulic side and a pneumatic side is disposed separately from the internal mixer main body, and the hydraulic side of the hydraulic cylinder for lowering the floating weight is connected with the hydraulic side of the pneumatic/hydraulic pressure conversion means. The reliability of the internal mixer can be improved while making the structure compact and facilitating the maintenance operation.

A tire vulcanizing system capable of performing high accuracy transportation of a green tire by a loader and of performing high accuracy transportation of a vulcanized tire by an unloader including a group of tire vulcanizing presses having many tire vulcanizing presses 1 arranged in a row and manipulators 2 arranged along the group of the tire vulcanizing presses in such a way that they may freely run. The tire vulcanizing presses 1 are constructed such that the upper and lower molds 80, 81 are stored between the engaging or disengaging upper and lower press members in such a manner that they may be fastened with the green tire mounting table 7 and the post-cure inflator 8 arranged around them. The manipulators 2 are provided with slides 31 which can be connected to the upper press member in such a way that they may be lifted up or descend, loader 32 for transporting the green tire from the center of the green tire mounting table 7 to the centers of the molds 80, 81, and unloader 33 for transporting the vulcanized tire from the centers of the molds 80, 81 to the center of the post-cure inflator 8 or its near center. The manipulators 2 are provided with the position setting element 34 for stopping in respect to the desired tire vulcanizing press 1. At least one of the loader 32 and the unloader 33 is provided with a centering corrector for accommodating for an error in stopping position by the position setting element 34.

Tire vulcanizing system

Growing community of inventors

Takasago, Japan

Ko Takakura