53results about "Mixing/kneading with aerating apparatus" patented technology

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.

In a conical twin-screw extruder in which two rotor shafts having flights on the outer peripheral surfaces thereof and being adjacent to each other in the lateral direction are accommodated in a barrel having a raw material supply port on one side and a raw material discharge port on the other side, and the distance between the rotor shafts and the outside diameters of the flights thereof are gradually reduced from the supply port side to the discharge port side, characteristically, the barrel is provided with a water-removing port for removing water contained in a raw material supplied through the raw material supply port, out of the barrel. The extruder can be applied to raw materials various shapes, sizes, and properties.

An extruder with a housing comprising parallel, partially inter-engaging bores and screws disposed therein is used when applying a method of feeding powdery bulk materials into such an extruder. A solid transport of powdery bulk material takes place in an inlet zone disposed downstream of a feed opening wherein said inlet zone is partially filled. The inlet zone is provided with at least one gas-permeable wall portion wherein a layer of bulk material is created on said wall portion, thereby preventing bulk material from passing through, The gas-permeable wall portion is connected to a vacuum source and to a pressure gas source. Furthermore, the gas-permeable wall portion has an inner wall which is set back with respect to the wall of the bores, thereby forming a gap with a partially annular cross section wherein a layer of the bulk material is formed in the gap.

An extruder includes a barrel and a kneading screw extending through the barrel in a rotatable fashion. The kneading screw is provided with a devolatilization portion. The devolatilization portion includes a kneading flight that is twisted in a direction for transferring a material downstream. The kneading flight kneads the material while transferring the material downstream and separates a volatile component from the material. Impregnation sections, which allow the kneading chamber to be impregnated with the material, are respectively disposed adjacent to an upstream side and a downstream side of the devolatilization portion so that the air-tightness of the devolatilization portion of the extruder is maintained. Accordingly, an efficient devolatilization operation of the material is achieved.

A vacuum kneading and deaerating device has a rotatable body provided in a chamber held under a closed or pressure-reduced condition, and which is rotated in a horizontal plane around a basic driving rotation axis. A container holder is provided in the chamber rotationably on an operating rotation axis parallel to the basic driving rotation axis in a revolution edge portion of the rotatable body, and detachably holds a paste container such that a central axis of the paste container obliquely intersects the operating rotation axis. A driving mechanism rotates the rotating body and the container holder. A deaeration valve for opening an internal space of the paste container to an internal space of the chamber by the action of centrifugal force attending on the rotation of the paste container, or a paste material-impermeable and gas-permeable membrane, is provided in an opening portion of the paste container.

A screw machine for treating at least partially powdery bulk material has a housing with at least one housing bore and a screw arranged in the housing bore. A vacuum housing portion is provided, which is formed as a vacuum housing insert, which is releasably attached in the housing, in which a metal nonwoven is exchangeably held as a gas-permeable wall portion on a base body.

The invention relates to a full-automatic cake beating machine. The full-automatic cake beating machine comprises a control cabinet, wherein the control cabinet is connected with a stirring power source and a beating head power source respectively, the output end of the stirring power source is connected with a stirrer, and the stirrer is positioned in a stirring cylinder; the output end of the beating head power source is connected with a spiked bat beating head which is connected with an air inlet pipeline; the stirring cylinder and the spiked bat beating head are respectively connected with a storing cylinder through a transmission pipeline and a rotor delivery pump, a cooling-water machine is also positioned on one side of the stirring cylinder, and the cooling-water machine is connected with an external water source through a water inlet pipe and a water returning pipe; the water inlet pipe is provided with multiple water inlet branches which are connected with the stirring cylinder, the storing cylinder and the spiked bat beating head, and the water returning pipe is provided with multiple water returning branches which are connected with the stirring cylinder, the storing cylinder and the spiked bat beating head. The full-automatic cake beating machine provided by the invention has the advantages that the structure is simple, the operation is convenient, the beating temperature is effectively guaranteed due to the arrangement of the cooling-water machine, the beating efficiency of a cake is improved, and the production cost is saved for enterprises.

A processing installation for devolatilization of polymer melts comprises a first extruder and a second extruder arranged downstream thereof in a direction of conveyance. The first extruder comprises several rotatably drivable first shafts which are provided with first treatment members and several devolatilization zones with associated devolatilization ports. Correspondingly, the second extruder comprises several rotatably drivable second shafts which are provided with second treatment members and several second devolatilization zones with associated devolatilization ports. The first treatment members have an external diameter which is smaller than or equal to that of the second treatment members. A devolatilization unit is arranged in a transfer zone which interconnects the extruders. The devolatilization unit comprises a perforated plate and a clearance arranged downstream in the direction of conveyance. A control unit is configured in such a way that when the processing installation is operated, the speed of the second shafts is lower than the speed of the first shafts. The processing installation allows a high devolatilization performance and a high polymer throughput to be achieved at the same time. A throttle is arranged in the transfer zone upstream of the devolatilization unit when seen in the direction of conveyance, with the position of the throttle being adjustable by means of the control unit.

A crushing and mixing device includes a mixing vessel in which a plurality of blades installed on a rotary shaft which is rotated by a motor as a driving source and freely rotatably supported, to mix and crush materials. A spiral vane is equipped to supply the materials which are introduced to a rotary shaft corresponding to an inlet from materials, to the mixing vessel; at least two blades are installed on the rotary shaft at an inclined angle; an outlet disposed at a side of a wall of the mixing vessel; the materials are mixed and crushed in the mixing vessel, and an entrained moisture therein is dewatered by the heat generated by actions of shearing, friction and compression; and a molten binder is impregnated in the dehydrated materials.

A method for producing composite materials, such as thermoplastic resins with mineral and / or vegetable fillers, consisting in feeding a mineral and / or vegetable filler, preheating the filler, feeding a melted thermoplastic resin onto the filler, introducing the mixture of the filler and the thermoplastic resin in an extruder, subjecting the mixture to high compression, producing a high partial vacuum, and compressing the mixture in an extrusion head, out of which the material to be subjected to subsequent treatments flows.

A device is provided with which it is possible to produce poly(methyl methacrylate) bone-cement paste, which is degassed to the greatest extent possible, while avoiding large-volume mixing containers and large cement volumes contained therein. The device includes a tubular hollow body (10) having a first opening (30) on the input side and a second opening (20) on the output side, at least one rotatably-mounted shaft (40) arranged in the axial direction in the tubular hollow body (10), thread turns (50) arranged axially along the outer side of the shaft (40), wherein the shaft (40) has at least one section with thread turns (50) whose pitch decreases in the direction of the second opening (20), at least one stirring blade (60) arranged on the shaft (40), and rigid mixing elements (70) arranged on the inner side of the tubular hollow body (10).

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.

The invention provides process for producing a PPE resin composition containing PPE powder using an extruder comprising: a vent pipe; a polyphenylene ether (herein after referred to as “PPE”) powder supplying pipe; an extruder supply hopper having an opening with a wall angle of 60° or more; and an extruder unit, wherein the vent pipe and the PPE powder supplying pipe each have an terminal orifice located in the opening of the extruder supply hopper, and wherein the PPE powder supplying pipe is disposed at a gear box-side portion of the extruder supply hopper, and the vent pipe is disposed at a die-side portion, relative to the PPE powder supplying pipe, of the extruder supply hopper, which process comprises the steps of: supplying the PPE powder to a gear box-side wall of the extruder supply hopper through the PPE powder supplying pipe; removing a gas accompanying the PPE powder in an effective amount through the vent pipe; and melt-kneading a mixture containing the degassed PPE powder with the extruder unit.