583results about "Dough mixing/kneading machines" patented technology

A gravimetric weigh scale blender having a plurality of hoppers 41, 42 and 43 discharging into a weigh chamber 14. The hoppers are funnel-shaped, each terminating in a discharge opening which permits flow of material from the hopper through a metering device 19 or 38 into a weigh chamber 14. Two of the hoppers are mounted for horizontal sliding displacement in the frame of the blender and a valve is provided at the bottom of each hopper to automatically close the hopper when it is moved horizontally. The valve consists of a shoe 53 slidable on the bottom of the funnel of the hopper to be operated by a saddle 51 on the frame so as to allow flow through the opening when the hopper is in its operating position but is displaced to close the opening when the hopper is moved away from the operating position. An improved metering device is also disclosed which comprises an auger device 70 which includes a trough 71 pivotally mounted under one of the hopper openings for pivotal movement between an operative position adjacent the opening and a clean-out position remote from the opening. An auger is provided in the trough which may be driven at the desired speed to provide a positive metered flow through the trough from the hopper's discharge opening into the weigh chamber.

A system for making extruded cement-based articles. The process can include forming a cement-based feed mixture including water, aggregate and binder and directing the feed mixture to a vacuum zone, wherein sufficient vacuum is maintained in the vacuum zone to remove entrained air and, preferably, excess water, from the feed mixture. The feed mixture is held in the vacuum zone at a negative pressure for a time sufficient to form a vacuum-treated or densified mixture. The vacuum-treated or densified mixture is passed through an extruder at an elevated pressure to provide an extruded cement-based article.

The present invention relates to reinforced polyamide molding compounds containing high-melting partially aromatic polyamides and flat glass fibers, in particular with a rectangular cross section, i.e., glass fibers with a noncircular cross-sectional area and a dimension ratio of the main cross-sectional axis to the secondary cross-sectional axis of 2 to 6, in particular 3 to 6, most especially preferably from 3.5 to 5.0. The present invention also relates to a method for manufacturing polyamide molding compounds and molded articles manufactured therefrom, i.e., in particular injection-molded parts. The inventive molded parts have a high transverse stiffness and transverse strength.

An energy storage device can include a cathode and an anode, where at least one of the cathode and the anode are made of a polytetrafluoroethylene (PTFE) composite binder material including PTFE and at least one of polyvinylidene fluoride (PVDF), a PVDF co-polymer, and poly(ethylene oxide) (PEO). The energy storage device can be a lithium ion battery, a lithium ion capacitor, and / or any other lithium based energy storage device. The PTFE composite binder material can have a ratio of about 1:1 of PTFE to a non-PTFE component, such a PVDF, PVDF co-polymer and / or PEO.

A system and method for forming an article from thermoplastic material and fiber. The method includes heating thermoplastic material to form a molten thermoplastic material for blending with the fiber. The molten thermoplastic material is blended with the fibers to form a molten composite material having a concentration of fiber by weight. The molten composite material may then be extruded through dynamic dies to deliver discrete controlled material that is gravitated onto a lower portion of a mold. The lower portion of the mold may be moved in space and time while receiving the flow of composite material to deposit a predetermined quantity of molten composite material thereon conforming to mold cavities of the lower and an upper portion of the mold. The upper portion of the mold may be pressed against the predetermined quantity of molten composite material and closing on the lower portion of the mold to form the article.

Apparatus and methods for applying treatment fluids, such as disinfectants, flavoring agents, and tenderizing agents, to foodstuff surfaces to, for example, reduce populations of microorganisms or fungi, alter taste, or alter texture. In representative embodiments, the apparatus includes a housing, a fluid delivery system, and a shaft with a protruding surface, the latter adapted to rotatably convey, while agitating and tumbling, the foodstuffs from an inlet to an outlet of the housing, as the fluid delivery system applies a treatment fluid to the foodstuffs. In more specific embodiments, the protruding surface may be paddles, or paddles interconnected by a solid web and having angled distal surfaces, or a spiral blade with radial protrusions, or such a spiral blade along a first longitudinal portion of the shaft and paddles along a second longitudinal portion of the shaft.

A method for incorporating wet use chopped strand glass (WUCS) in a screw extrusion process is provided. A polymeric resin is added to an extruder in a polymer feed zone and conveyed to a first compression zone where the resin is at least partially melted. The molten resin is conveyed to a high volume zone where WUCS fibers are added. In the high volume zone, the flights of the screw may have a greater pitch to facilitate the introduction of the WUCS into the extruder. The molten resin / fiber mixture is conveyed to a second compression zone where the resin and fibers are intimately compounded. Next, the molten resin / fiber mass is conveyed to a low pressure zone where moisture evaporated from the fibers is released through an opening. The resin / fiber mixture is then conveyed through a compression / die feed zone to further compound and mix the resin and fibers.

An array of nozzles is disclosed for forming multiple cellulose fibers. Each nozzle has a longitudinal central axis and includes a tube with a cross-section having a diameter through which an aqueous solution of cellulose and a solvent can be extruded into a molten filament. A first opening is present which surrounds each of the tubes. The first opening has a cross-section with a diameter, and each of the first openings is capable of emitting a pressurized gas which surrounds one of the extruded molten filaments. At least three second openings are spaced away from each of the first openings. Each of the second openings is capable of emitting a pressurized gas stream essentially parallel to the longitudinal central axis of each of the nozzles, and each of the pressurized gas streams functions to shroud one of the extruded molten filaments.

Gum manufacturing machinery and method of manufacturing gum is illustrated in which a gum loafing machine generates loaves of finished gum that are then subsequently run through a gum conditioner to more uniformly set the temperature and viscosity of the gum material prior to further processing. Upon achieving the appropriate conditioning level, a further forming extruder may be used to generate a continuous gum ribbon for subsequent rolling and scoring operations. The gum conditioner may include vertically stacked conveyors that have different operational modes including a first mode that provides a serpentine path for a long residence time and a second mode that provides a cascading path that avoids or bypasses much of the length of some of the conveyors to provide a shorter residence time. The gum manufacturing machinery may be used in an adjustable manner so as to accommodate difference gum recipes for different batches of gum product.

An apparatus and a method for spinning dyed filaments from a dyed polymer melt, wherein an undyed polymer melt is produced by a melt producer. A liquid dye is added to the polymer melt by means of a dye metering device. To mix the liquid dye and dye the polymer melt, a mixing unit is provided. The dyed polymer is then spun to filaments by means of a spin unit. To obtain before the spinning step a uniform coloration of the polymer melt despite the short dwelling time of the liquid dye in the polymer melt, the liquid dye and the polymer melt are mixed in a plurality of successive mixing units which are formed by a mixer combination comprising at least one static mixer and at least one dynamic mixer.

(EN) The invention concerns a method for producing a thermoplastic molding material or element, said material or element containing nanometric inorganic particles. In molten state, the thermoplastic is mixed with the nanometric inorganic particles and with a solubilizing agent in a conveyor screw extruder, the pressures and temperatures being adjusted so that the plastic is in melt form and the solubilizing agent in supercritical state. The invention is characterized in that at the output of the extruder, the mixture passes through a slot with a passage less than 20 $g(m)m to penetrate into an expansion zone and the molten material, wherein are incorporated the nanometric inorganic particles, is evacuated, reduced into molding material after cooling or transferred into a molding tool to be molded. The invention also concerns the molding material and the molding elements obtained by this method, as well as the uses thereof.

The invention relates to an extruder with two screws, a first screw and a second screw each comprising a threaded conical shaft having a first end with a bigger diameter and a second tapered end, said screws being arranged converging towards each other for the extrusion of plastomers, elastomers and viscous liquids in general. According to the invention, said first screw has a corresponding thread with a first portion which is diametrically larger than a corresponding first portion of the thread of the second screw.

A gypsum wallboard core, and methods and apparatus for making the same are disclosed. Methods of making a gypsum wallboard core include extruding a gypsum slurry containing water, gypsum, slip agents, water-reducing agents, surfactants and, optional additives, through a die and onto a substantially flat, smooth, moving surface. The die has provisions at its outer sides for the introduction of slip agents into the slurry, and provisions at its lateral outer edges for the introduction of a strength-enhancing agent. Once extruded onto the conveyor belt, the slurry is chemically-activated to set and form a hardened board core which then may be easily removed from the conveyor belt and dried.

The present invention provides blowing agent introduction systems and methods for introducing blowing agent into polymeric foam processing systems. The methods may involve introducing one or more doses of blowing agent into polymeric material in an extruder during a plastication period of a molding cycle. Prior to introduction, a dose is confined in an accumulator which, for example, has a volume defined between an inlet valve and an outlet valve. A control system may receive inputs related to system parameters (e.g., pressure of polymeric material in extruder, axial position of screw in barrel, whether screw is rotating, and the like) and based on the inputs coordinates operation of the valves to confine and introduce the blowing agent dose(s). The introduction systems may be used in discontinuous plasticating processes, such as injection molding and blow molding, and can be particularly useful in processes that use precise quantities of blowing agent.

A method and apparatus for making filter elements in which a mixture of activated carbon granules and fibers are processed with meltable polymer fibers to form a porous element. The density of the porous structure increases in a direction from the periphery thereof to its center. Also, the article formed by the method using the apparatus.

A method of increasing the intrinsic viscosity of polyester by means of solid state polymerization, wherein a polyester plastics melt is granulated and after granulation is conveyed into a thermal treatment container (13) for thermal treatment therein, the granules being produced slightly below their melting temperature and being fed into the thermal treatment container (13) immediately after granulation so as to utilize the residual heat in the granules, as well as an arrangement for increasing the intrinsic viscosity of polyester by means of solid state polymerization with a granulating and a thermal treatment unit, with an unheated, thermally insulated container (13) or a container (13) having wall heating means (15) being provided as the thermal treatment unit, which is directly connected to the granulating unit via a conveying device (11, 36, 37).

An apparatus and method for mixing by producing shear and / or cavitation, and components for the apparatus are disclosed. In one embodiment, the apparatus includes a mixing and / or cavitation chamber with an element such as an orifice component that is located adjacent the entrance of the cavitation chamber. The apparatus may further include a blade, such as a knife-like blade, disposed inside the mixing and / or cavitation chamber opposite the orifice component. In one version of such an embodiment, at least some of the portions of the orifice component surrounding the orifice and / or the blade are made of a material or materials that have a Vickers hardness of greater than or equal to about 20 GPa. A process for mixing by producing shear and / or cavitation in a fluid is also contemplated herein.

An injection molding machine includes an injection molding cylinder with a material supply at one end and an injection nozzle at the other end and a material conveyance unit attached to a drive and movable in the injection molding cylinder. The injection molding machine also includes a vibration element for inducing a flow of melt within the injection molding cylinder for homogenizing the melt.

The present invention relates to a process for the manufacture of composite materials having lignocellulosic fibres dispersed in a thermoplastic matrix, while generally maintaining an average fibre length not below 0.2 mm. The process comprises defibrillation of the lignocellulosic fibres using a mixer and at a temperature less than the decomposition temperature of the fibres in order to separate the fibres and generate microfibres, crofÊbres, followed by dispersion of the fibres in the thermoplastic matrix by mechanical mixing to get the moldable thermoplastic composition, followed by injection, compression, extrusion or compression injection molding of said composition. The process produces high performance composite materials having a tensile strength not less than about 55 MPa, a flexural strength not less than about 80 MPa, a stiffness not less than about 2 GPa, notched impact strength not less than about 20 J / m, and un-notched impact strength not less than about 100 J / m. The composite materials of the present invention are well-suited for use in automotive, aerospace, electronic, furniture, sports articles, upholstery and other structural applications.

A process for producing a biopolymer nanoparticles product is disclosed. In this process, biopolymer feedstock and a plasticizer are fed to a feed zone of an extruder having a screw configuration in which the feedstock is process using shear forces in the extruder, and a crosslinking agent is added to the extruder downstream of the feed zone. The biopolymer feedstock and plasticizer are preferably added separately to the feed zone. The screw configuration may include two or more steam seal sections. Shear forces in a first section of the extruder may be greater than shear forces in an adjacent second section of the extruder downstream of the first section. In a post reaction section located after a point in which the crosslinking reaction has been completed, water may be added to improve die performance.

An apparatus and a method for injecting a liquid dye into a polymer melt, which includes a metering pump with a metering inlet and a metering outlet. The metering inlet connects to a dye tank and the metering outlet connects to a polymer melt carrying component. To add the liquid dye to the polymer melt in the melt carrying component in a quantity that is as uniform and accurate as possible, the invention provides for connecting the metering inlet of the metering pump to a feed outlet of a feed pump, which connects with its feed inlet to the tank. With that, it is possible to generate a feed pressure at the metering inlet of the metering pump, which can be adapted to an injection pressure at the metering outlet of the metering pump.

A thermosetting powder coating composition extruder system including an extruder body and an injection system is disclosed. The extruder body includes segments surrounding one or more rotating screws. A first segment's main inlet receives material, such as from a pre-mix hopper, and a final segment's outlet discharges extrudate. A low pressure injector injects additives, particularly those that are hard to incorporate, into one or more segments at one or more injection positions at the main inlet or between the main inlet and the outlet. The injector includes a source of pressurization coupled to a pressure vessel, a pressure regulator maintaining the pressure at or below a given level, a flow regulator, and an injection port. A sensor adjacent the outlet monitors the physical characteristics of the extrudate and is coupled to a controller of the low pressure injector for dynamic control thereof.

A drive train having a clutch assembly for transmitting torque between an engine and a transmission. The clutch assembly is selectable for transmitting torque between the engine and the transmission and includes at least one friction clutch, the clutch assembly being supported on the transmission housing so that the clutch assembly is radially fixed and displaceable in an axially limited manner.

A device for producing a high density compact livestock feed from a loose granular material according to various embodiment can include a source for supplying a loose granular material to be treated. A series of successive treatment zones comprises a heating zone, a compression zone, and a cooling zone. The heating zone comprises at least one heater and at least one screw compression dryer configured to receive the loose granular material to be treated for drying. Rotation of the screw transfers the treated material to the compression zone. The compression zone comprises a compression chamber for compacting the treated material to form a high density compact body. The treated material is pressed through the compression chamber while a two-dimensional cross-section compression is applied to the treated material. The cooling zone comprises a cooling unit for cooling the high density compact body received from the compression zone.

A gravimetric blender has a frame, at least one material storage hopper at the top of the frame including a hopper cover, a weigh bin located within the frame, below the hopper, for receipt of material from the hopper to be weighed and being adapted for downward discharge of the material in the bio bin after the material received from the hopper has been weighed, at least one load cell connecting the weigh bin to the frame for sensing the weight of contents of the weigh bin, a mixer within the frame below the hopper, for mixing material weighed in the weigh bin after that material falls downwardly from the weigh bin to the mixer, and a guide adapted for vertical movement of the hopper cover therealong between positions which the cover contacts and thereby closes the hopper and at which the cover is spaced vertically above the hopper so that the hopper is open at the top.

An apparatus for pre-processing and subsequent plastification or agglomeration of synthetic plastic materials, in particular thermoplastic waste plastics for recycling purposes, has a receptacle (1) in which at least one comminuting tool (6) circulates. The housing (7) of a screw (8) is connected to the receptacle (1). The diameter (D) of the receptacle (1) has the following relationship to the screw diameter (d):D=10.{square root over (K.d2)}, wherein D is the inner diameter of the receptacle in mm,d is the screw diameter in mm andK is a dimension-less constant which amounts to at least 190.Thereby the dwell times of the synthetic plastic material within the receptacle (1) are kept at optimal values.

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.