摘要:
An improved multiple-screw extruder, in particular a twin-screw extruder comprises a housing. Several housing bores are located in at least one section within the housing. The housing bores overlap at least along a partial axial length of the housing. One extruder screw is arranged in each of the several housing bores. At least two motors are provided for the at least two extruder screws. A synchronizing and torsion transmitting device, by means of which both cooperating extruder screws can be synchronized, is provided on both the inlet side and the discharge side.
摘要:
A clay mixing apparatus includes a mixing chamber, a rotor arranged within the mixing chamber, a drive unit arranged to rotate the rotor, an ejecting unit, a pressure reducing unit; and an exhaust flow path. The rotor includes a shaft rotated by the drive unit, an extruding member and a mixing member. The mixing member includes a plurality of arms and a plurality of blades arranged at tip ends of the arms. The exhaust opening is opposed, in a radial direction about the center axis, to a portion of the mixing member lying near the extruding member and/or a portion of the extruding member lying near the mixing member.
摘要:
A kneader which comprises a main body, which forms a support structure, part of the main body constituting a support for a bowl or receptacle; a rotatable helix mounted on the main body so as to extend into the bowl or receptacle, the helix being connected to appropriate drive means which effect rotation of the helix about its axis in either a clockwise or counter-clockwise direction, the arrangement being such that when the helix is rotated in one direction material within the bowl is kneaded and when rotated in the opposite direction of rotation the kneaded material is lifted upwardly out of the bowl by the helix; the kneader being further provided with means for guiding the kneaded material over the edge of the bowl or receptacle so as to effect removal of the kneaded material from the kneader.
摘要:
The present invention relates to a novel extruder screw and method for extruding low melt viscosity polymers which form an anisotropic melt phase. In a preferred embodiment, the method and apparatus according to the present invention employ a high rate of rotational speed of the extruder screw in combination with a relatively low compression ratio and a high volume rate of flow through a compression section in order to effectively extrude the low melt viscosity liquid crystalline polymers. The particular design of the screw is dictated by the unique rheology of the polymers which are difficult to effectively move along the helix of the screw due, in part, to the extremely low viscosity. Each dimension and each relative size of the various sections of the screw must be carefully controlled in order to effectively extrude the unique material.
摘要:
The process, conducted completely under vacuum, provides that a material of any kind (marble, stone or material of other nature) of variable particle size is introduced, together with a binder (organic or inorganic) into a mixer (2) and then, after having achieved the complete homogeneity of the mixture, is discharged in a convenient manner into a mouldbox (1) which is then transferred to the interior of a press (6) where the beam (8), provided with vibrators (10), subjects it to a combined action of pressure and vibration of the mass which the mixture in volume to result in blocks suitable to be cut into slabs or into blocks of lesser dimensions according to need.
摘要:
Torque-splitting pinion gear for twin-screw machines comprising a first, direct-driven screw shaft, which has an output pinion meshing with a drive pinion provided on a coupling shaft, and also comprising a drive pinion provided on the second screw shaft, this pinion being axially offset towards the front relative to the output pinion of the first screw shaft and being drivable via an output pinion of the coupling shaft.In order to simplify such a gear and to optimize the driving of the two screw shafts the following features are used in combination:The output pinion of the coupling shaft meshes directly with the drive pinion of the second screw shaft; the coupling shaft is designed as a torsion bar; at least one of the pinions is rotatable and lockable in position relative to its shaft; the torsion resistance of the coupling shaft and the transmission ratio between first screw shaft, coupling shaft and second screw shaft are adjusted to the torsion resistance of the section of the first screw shaft lying between the output pinion of the first screw shaft and the drive pinion of the second screw shaft such that both screw shafts are always in proper phase relation with each other.
摘要:
This disclosure is directed to an apparatus to process pizza dough. The apparatus includes a platform to support the dough to be processed, and further includes a platen having finger-like projections positioned to operatively come in contact with the dough. The platform and platen are caused to oscillate relative to one another along an axis perpendicular to the dough support surface, and also move rotationally relative to one another in a plane parallel to the dough support surface. The motion of the platform and platen is in a predetermined timed relationship to cause the projections to engage and process the dough.
摘要:
A method for mixing and masticating highly viscous materials in a mixing apparatus comprising a mixing chamber the wall of which is provided with heat exchange means for heating and cooling and at least one rotor, driven by a motor, wherein the energy utilized for mixing and masticating (UE) and the supplied energy (SE) are determined by recording the couple and the number of revolutions of the rotors, and the heat exchanged between the materials treated and the wall is determined by recording the temperature of the materials treated, the temperatures of the heat transfer medium on entering and leaving the heat exchange circuit and the flow rate of the heat transfer medium, and the ratio of UE to SE is adjusted to an optimal value at a minimal SE.
摘要:
A screw extruder of the type in which a pair of counter-rotating screws of progressively increasing diameter plasticize and extrude thermoplastic resins and in which an equal ratio of power conversion in shear and convective heating to throuput of material is obtained over the length of the screws.