Abstract:
Mixing device 1, dosing container and mixing hopper for mixing a synthetic starting material with an additive, in particular a granular additive or additive in powder form, comprising a mixing housing 10 with an inlet 14 for allowing the substances into a mixing chamber 12 bounded by the mixing housing and an outlet 16 for discharging the substances from the mixing chamber in mixed form, wherein a rotor body 11 is provided on a rotatable shaft 17 in the mixing chamber and comprises on a side a number of rotor arms 18 extending parallel to the shaft in the direction of an opposite wall of the mixing housing 10, and wherein the opposite wall of the mixing housing is provided with a number of stator arms 19 extending parallel to the shaft in the direction of the rotor body, and wherein a mixing hopper is provided having an infeed side for receiving a flow of the substances for mixing and an outfeed side which is in open communication with the inlet of the mixing housing 10, and wherein a dividing body is provided between the infeed side and outfeed side in order to divide the flow of the substances for mixing into a number of at least substantially equal part-flows.
Abstract:
A mixing device (11) in the form of a generally spheroidal multiple chambered enclosure is created from three shells (13, 15, 17) and a pipe (29). The device (11) includes two hemispheroidal shells (13, 15) each with a rim (19) which joins to the rim of the other to form a first generally spheroidal chamber (33), and one truncated hemispheroidal shell (17) having a rim for joining to the rim (19) of one of the hemispheroidal shells (13, 15).
Abstract:
Apparatus for mixing viscous fluids such as natural and synthetic polymers and their additives under thermally controlled conditions. Accordingly, the mixing device comprises a multitude of coradially nestled bell shaped cylinders (4, 8) with alternating stationary and rotating cylinders blades. The rotating body of cylinders is attached to an external power source such as a motor driven screw (3) of a plasticating extruder. The stationary body of cylinders is attached to the container walls of the plasticating apparatus, i.e., extruder barrel, either as an integral part of the die or sandwiched between the die and extruder barrel. The stationary block is cored to provide a passage (7) for a heating or cooling fluid thus providing efficient heat exchange capabilities to the apparatus. The coaxially positioned cylindrical blades may be provided with any number of pins, blocks, blades, channels (13), etc., designed to enhance the mixing capabilities of the device by slicing, shearing and mixing the viscous fluid. The mixed fluid is allowed to exit from the mixing device through a circular channel (9) in the center of the stationary component of the mixer. Throughout the device, the direction of flow is reversed 180 degrees at the end of each blade while the fluid is subjected to transverse shearing actions and each side of the main stream is alternately exposed to the temperature controlled stationary cylindrical blades. The combined and simultaneous application of shear, mixing, and cooling results in a highly efficient melt mixer and heat exchanger.
Abstract:
Batch mixing takes place in the gap (3) between grooved faces of counter-rotating discs (1, 2) such that the spiral grooves (8) and lands (10) of each face traverse the grooves (8) and lands (10) of the other, to shear and split material drawn inwardly along the grooves (8) for distributive mixing. Modifications include plural-turn spiral, straight, and truncated spiral grooving (Figures 5 to 10), and batch mixing in which only one disc (28) rotates (Figure 11). Continuous mixing involving shear is carried out within a cylindrical barrel (40 Figure 12; 57 Figure 13) between its internal helical-grooving (43; 59) and the helical grooving (44; 60), of opposite hand, of a rotor (41; 58). The shearing can produce mechanochemical reactions that break down the molecular structure of the material, notably in the context of mastication and solubilising of used rubber in reclaim from vehicle-tyres.
Abstract:
The proposal is for a mixer, especially a high-performance mixer for fine-grinding pre-ground materials with treatment agents and/or additives, especially bleaching chemicals, with an annular mixing and fine-grinding region formed between a disc rotor (7) and an annular stator (5) and a central material feed channel (17), in which there is a force-feeding device for feeding the pre-ground materials in the material feed channel into the mixing and fine-grinding region, especially in the form of a ribbon feed screw (2, 3, 4).
Abstract:
The description relates to a mixing head for foaming a substance with a gas, e.g. a dairy product with nitrogen. The mixing head has a rotor with coaxial circles of teeth arranged in radially and axially staggered array. The substance to be foamed thus passes through the mixing head both radially and axially, whereby the teeth of the circles arranged axially one behind the other can become finer with increasing proximity to the exit aperture. The mixing head is preferably formed in several stages, i.e. within a rotor/stator stage the toothed circles have the same axial position with no axial offset.
Abstract:
A change in the surface properties of apparatus for pharmaceutical preparation results from steam sterilisation. This change may be avoided by the use of apparatus with more hydrophilic post-sterilisation surfaces, e.g. those of gold. Hence there is provided a process for the preparation of a mixture comprising a discontinuous phase in a continuous phase which comprises using a mixing apparatus having a non-porous mixing surface which is repellant to the discontinuous phase and/or attractive to the continuous phase when the continuous phase is liquid or which is attractive to the discontinuous phase when the continuous phase is gaseous, whereby to improve the efficacy of the preparation of said mixture and/or to reduce physical degradation of said mixing surface, said surface if hydrophilic being more hydrophilic after sterilisation than is stainless steel and if hydrophobic being more hydrophobic after sterilisation than is stainless steel.
Abstract:
A process for the mixing of materials by means of the combination of shear-dispersion and/or extensional-dispersion and distributive mixing actions, in which the mixing occurs in one or more stages within the mixer on material that is essentially propelled through such stages by pumping actions provided within the mixer itself.
Abstract:
A mixer, having a unique rotor, is particularly suitable for mixing paper pulp having a consistency of about 6-15 % (medium consistency) with a bleaching gas having an ozone content of at least one percent, and typically at least six percent. The rotor comprises a disc shaped base (11), a hub (14) at the center of the base for connecting it to a drive mechanism for driving the rotor at an angular velocity of 1000-6000 rpm, and one or more rings concentric with the base and extending outwardly from the base at least about three inches (and of the same for different heights). A number of blades (19-22) may extend radially through the center of the base along the contour of the rings, extending outwardly from the base, rings, and hub. Degassing holes (25) may be formed in the hub and connected up to a suitable degassing structure in the mixer. The rings may have a cross-sectional shape corresponding to that of a truncated right circular cone frustum, or may have a rectangular cross section. The rotor is mounted in a housing having a pulp inlet (32) and outlet (33), and the stator (31) has complimentary shaped cooperating surfaces with the rotor defining annular mixing volumes, the cooperating surfaces having a spacing of 0.5 inches or less (preferably 0.25 inches or less). The fluid to be mixed with the pulp is introduced into the inlet adjacent the rotor and into the mixing volumes, for example at the extremity of the rings from the base.
Abstract:
In injection of steam, gas or liquid into a fluid product in an injection apparatus having a substantially disc-shaped rotor (5) and having a central product inlet (10) and a peripheral product outlet (11), the injection is carried out in a limited zone (13) above the disc-shaped rotor (5) at a distance from both said inlet (10) and said outlet (11), the fluid product being also exposed to a radial displacement effect and a tangential dispersion effect. The fluid product may be a liquid with considerable variation of dry solids content and viscosity. The injection apparatus comprises at least one cylindrical wall (7, 8) projecting upwards from the disc-shaped rotor (5), which wall projects between coaxial cylindrical walls (14, 15) projecting downwards from an overlying stator cover (9). The coaxial cylindrical walls (7, 8, 14, 15) on the rotor (5) and the stator cover (9) are formed with substantially axis-parallel sharp-edged slots (19), and feed passages (16) are connected to the stator cover (9) for injection into a space (13) positioned between the coaxial cylindrical walls (14, 15) on the stator cover (9) and constituting an injection chamber.