Abstract: A turbine blade with a generally hollow airfoil having an outer wall that defines a chamber for receiving cooling air, the airfoil comprising a leading edge that resides in an upstream direction, a trailing edge that resides in a downstream direction, a convex suction side, a concave pressure side, and an insert disposed within the chamber that is configured to initially receive at least a portion of the cooling air entering the chamber and direct the cooling air through a plurality of insert apertures to cool the inner surface of the outer wall, the insert further comprising a configuration that generally conforms to the contour of the outer wall of the chamber but in spaced relation thereto, wherein the chamber and insert narrow as they extend toward the trailing edge, the insert eventually terminating and the chamber eventually terminating at a pin array section, wherein a first distance exists that comprises the generally axial distance between the position of downstream termination point of the insert an

Abstract: A turbine rotor blade with a row of exit slots adjacent to a trailing edge region of the airfoil that extends from the platform to the blade tip, where the row of exit slots is formed into three groups that include an upper span group, a mid-span group and a lower span group. The upper span group discharges film cooling air upward with respect to the airfoil chordwise direction, the mid-span group discharges along the chordwise direction, and the lower span group discharges in a direction downward with respect to the chordwise direction. Each exit slot is formed with a plurality of metering inlet holes that discharge into a first diffusion section and then a second diffusion section.

Abstract: A centrifugal blowing apparatus for reducing flow-induced noise is disclosed. The apparatus includes a blower housing having a scroll section formed about a rotational axis and an exhaust section extending from the scroll section. The scroll section includes an opening defining an inlet configured to draw in air and the exhaust section defines an outlet in fluid communication with the inlet. The scroll section commences with a reduced cross-sectional area defining a cutoff and expands to an increased cross-sectional area. An impeller is disposed in the opening of the scroll section about the rotational axis and includes an outer surface having impeller blades radially disposed thereon. The impeller blades rotate to direct a flow of air from the inlet through the scroll section to the outlet. A plurality of indentations is formed along an inner surface of the scroll section at the cutoff.

Abstract: The present invention relates to a nacelle for a turbojet, comprising an air inlet structure capable of channelling a flow of air to a turbojet fan and a middle structure (5) comprising a casing (9) designed to encircle said fan, with the air inlet structure attached to it, said structure having a peripheral inside surface at least partly equipped with a sound-attenuating structure (13) extending without geometrical interruption around at least part of the casing, said structure being characterized in that a gap (14) is provided between the sound-attenuating structure and the casing.

Abstract: A fan unit has a fan (10). Associated with the fan is an air-guiding tube (22) through which the fan (10) transports air, during operation. The air-guiding tube (22) is connected to at least one carrier tube (23) for suspension of the fan (10). The fan includes a carrier part (25). A damping member (30) is arranged between the carrier part (25) and the carrier tube (23) to reduce any structure-borne sound which occurs during operation of the fan (10).

Abstract: A plenum fan comprising a fan wheel disposed within a box-like enclosure includes a secondary inlet cone, a primary inlet cone, and a flexible duct. The two inlet cones convey air to the mouth of the fan wheel. A frame supports the fan wheel and the primary inlet cone such that the frame, the fan wheel and the primary inlet cone comprise a fan assembly. If the fan assembly shifts due to fan thrust or vibration, the fan assembly moves as a unit. The flexible duct connects the primary inlet cone to an inlet of the enclosure while isolating the fan assembly's vibration from the enclosure. The secondary inlet cone extends from the inlet of the enclosure, protrudes into or toward the primary inlet cone and provides a smooth airflow path over the abrupt shape of the flexible duct.

Abstract: In a first aspect, the present invention provides an air inlet cover (1) comprising a grille (2) having a plurality of radial elements (3) radiating from a center of said grille (2), each said radial element (3) comprising a vane (4) having a leading edge (5) for positioning further from a fan and a trailing edge (6) for positioning closer to a fan, the leading edge (5) of each said vane being offset from the respective trailing edge (6) thereof by substantially the same angular amount (?) for each said vane (4), whereby the vanes are pitched more steeply closer to the center of said grille (2) than remote from the center of said grille, and a circumferential element (7) comprising a bell-shaped mouth enclosing said vanes (4) and having a plurality of apertures (8) formed in a surface thereof, each respective one of said apertures (8) having a first edge (9) parallel to the pitch of a first respective vane closer to the center of said grille and a second edge (10) parallel to the pitch of a second, adjacent r

Abstract: A fluid deflector is for a fluid separator including a central axis and an enclosed wall having an open end and an inner circumferential separation surface extending about the axis to define an interior separation chamber. The fluid deflector includes a base disposable proximal to the wall open end and having a central axis collinear with the separator axis. A plurality of vanes are connected with the base so as to be spaced circumferentially about the central axis. The vanes define a plurality of flow channels each bounded by a separate pair of adjacent vanes and having an inlet and an outlet. Each vane directs flow through a bounded channel generally radially inwardly from the channel inlet toward the channel outlet and generally circumferentially and radially outwardly from the channel outlet.

Abstract: The invention relates to a pump for pumping contaminated liquid including solid matter, comprising a pump housing provided with a rotatable impeller suspended in a drive shaft and having at least one vane, and an impeller seat, at least one part of the impeller and the impeller seat being movable in the axial direction in relation to each other. Furthermore, the impeller seat presents at least one groove in the top surface thereof.

Abstract: A turbine is provided and includes a turbine shell including shrouds at multiple stages thereof, and constraining elements, disposed at least at first through fourth substantially regularly spaced perimetrical locations around the turbine shell, which are configured to concentrically constrain the shrouds of the turbine shell.

Abstract: Expansion turbine having a variable nozzle mechanism comprises an adiabatic expansion device located in a vacuum container having a turbine impeller therein which rotates and drives the turbine impeller during adiabatic expansion of very low temperature gas, and varies the throat area of very low temperature gas introduced in the turbine impeller by driving a nozzle member disposed near the outside end of the adiabatic expansion device by a drive force from a driving member located outside the vacuum container; wherein the driving member comprises a cylindrical member disposed coaxially with the turbine impeller, and the nozzle member is provided on the extension of the body of the cylindrical member in the axial direction.

Abstract: A leaf seal 10 in a rotary machine is located between a higher pressure region 14 and a lower pressure region 16 of the machine. Blow-down forces are greater on the lower pressure side 16 of the leaf seal 10 than on its higher pressure side 14, resulting in greater inward deflection of the leaves 20 on the lower pressure side of the seal than on its higher pressure side, leading in turn to greater wear of the leaves and the contacting rotor surface 44 on the lower pressure side 16 of the seal. To counteract this, the free ends 36 of the leaves 20 can be given a tapered profile 42 to gradually reduce the length of each leaf 20 over its width ‘w’ from its higher pressure side 14 to its lower pressure side 16, so that the leaves 20 are free to deflect under the blow-down forces by the amount of their reduction in length (a maximum of ‘x’), before they contact the rotor surface.

Abstract: A hybrid gas compressor has at least one rotor and shroud which define a compressor gas path extending from an inlet to an outlet. The compressor includes at least two compression stages and one diffusion stage between the inlet and outlet, the compression stages including respective circumferential arrays of blades extending from the rotor and the diffusion stage including a circumferential array of vanes between the compression stages. Blade aerodynamic loadings may be controlled, particularly in the last stage, to provide desired compression characteristics across the compressor. A bleed outlet is optionally located between the inlet and outlet for bleeding from the gas path.

Abstract: A multi-impeller arrangement and to a pump having the impeller arrangement. The impeller arrangement or impeller cluster includes at least two impellers, each impeller having an annular back plate and an annular front plate. The impellers are releasably secured together in an axially in-line series having the front plate of a first impeller at one end and the back plate of a second impeller at the other end. The second impeller includes an axial projection which extends from its back plate, through and beyond its front plate to the first impeller. The first impeller is engaged with the projection of the second impeller such that all impellers are rotatable as an assembly.

Abstract: Provided is an axial fan apparatus including a housing and an axial-flow impeller. The axial-flow impeller is capable of rotating inside the housing and includes a plurality of axial-flow wings each having a negative pressure generation surface for generating a negative pressure, and an auxiliary vane standing on the negative pressure generation surface at an end portion of each of the plurality of axial-flow wings.

Abstract: In one aspect, a method for controlling the amplitude modulation of noise generated by a wind turbine is disclosed. The method may generally include determining an angle of attack of a rotor blade of a wind turbine and maintaining the angle of attack at a substantially constant value during rotation of the rotor blade in order to reduce the amplitude modulation of the noise generated by the wind turbine.

Abstract: An assembly for changing the pitch of fan blades rotatably attached to a hub includes a main drive shaft configured to rotate the hub. The main drive shaft is rotated by a first motor. A secondary drive shaft is coupled to the main drive shaft via a gearing system located within the hub. The secondary drive shaft is also driven by a second motor. When driven by the second motor, the secondary drive shaft manipulates the gearing system to alter the pitch of the fan blades.

Abstract: A centrifugal force bearing having a means for providing a steady pitching moment is disclosed. The centrifugal force bearing may optionally comprise a coning means. A rotor system having the centrifugal force bearing is disclosed. A rotary-wing aircraft having the centrifugal force bearing is disclosed.

Abstract: Drive units for variable-length rotor blades are located so as to move mass closer to the center of a wind turbine rotor. In some cases, drive units are located within a root portion of a base blade of a blade assembly. In other cases, drive units are located outside of the blade assemblies. In some such cases, drive units are contained within separate couplers used to connect blade assemblies to a wind turbine rotor hub. In other cases, one or more drive units are located within a rotor hub.

Abstract: A platform cooling structure for a gas turbine moving blade is provided which is capable of improving cooling performance of a platform and of improving reliability of a moving blade in such a manner that a portion in the vicinity of a side edge of the platform which is away from moving blade cooling passageways and is easily influenced by thermal stress caused by high-temperature combustion gas, that is, an upper surface of the side edge is effectively cooled by guiding high-pressure cooling air, flowing to the moving blade cooling passageways, to a discharge opening formed in a surface of the platform in the vicinity of the side edge of the platform without particularly attaching an additional member such as a cover plate to the platform. A moving blade cooling passageway 17c is formed in the inside of the gas turbine moving blade.

Abstract: A turbine component (25) includes a root (21), a tip (22), and an airfoil portion (7) having a leading and a trailing edge (8,9), an external suction side and pressure side wall (13, 14) between the leading and trailing edge. The walls enclose a central cavity (1-6) for the passage of cooling air, the cavity being partitioned into a leading edge- and a trailing edge region (7a, 7b) by at least one longitudinally extending first web (15) connecting the suction side wall with the pressure side wall and a second longitudinally extending web (16), connecting the first web with the suction side wall, thereby defining a first and second entry chamber (2, 3). The first web (15) is provided with at least one cross-over hole (H1) between the first entry chamber and the leading edge chamber (1), whereas the second web has no openings.

Abstract: A turbine rotor blade with a serpentine flow cooling circuit to provide cooling for the airfoil section, where the serpentine flow circuit is formed of a series of up-pass channels and at least one down-pass channel, and where the up-pass channels are formed by a series of impingement cavities separated by slanted ribs each with an impingement hole to direct impingement cooling air against the backside surface of the airfoil wall for cooling, and where the down-pass channel or channels is an open channel to minimize a pressure loss in the cooling air flow. Rotation of the blade produces a centrifugal force on the cooling air flow that increases the pressure of the impingement cooling air at the blade outer radial span wise direction.

Abstract: A rotor blade for a wind turbine is provided, the rotor blade having a first module of a first type and a second module of a second type, each module having a distal end and a proximal end, wherein the distal end of the first module and the proximal end of the second module are adapted to be attached to each other to form at least a part of the rotor blade, wherein at least one of said first and second modules is selected from a set of at least two differently shaped modules of the same type. Further, a kit of parts for adapting a wind turbine to a site constraint is provided, the kit of parts comprising several modules for assembling a modular rotor blade, wherein the several modules comprise at least one root-type module and at least one tip-type module and at least one further module of the root-type or the tip-type, wherein the at least one further module has a different shape compared to the other module of the same type.

Abstract: A vibration damper assembly for damping non-synchronous vibration between adjacent, spaced apart components comprises a vibration damper located in both of a pair of generally confronting passages in each of the components. The assembly comprises at least two spaced apart articulation surfaces for contact between damper and component, each of the articulation surfaces is arcuate in a first direction and is characterized by having a substantially linear portion in an orthogonal and second direction. Thereby the contact area is greatly enlarged and material loss minimized. The cross-sectional shape of the damper or passage is non-circular and there is a clearance between the damper and passage sufficiently small to prevent rotation of the damper in the passage during use.

Abstract: A flow directing assembly for use in a turbine engine comprising: a plurality of circumferentially spaced blades, each of the blades including a radial projecting airfoil with a concave pressure side and a convex suction side that extend from a platform; and a plurality of flow passages, each flow passage defined by the airfoils of neighboring blades and an inner wall formed by abutting platforms of neighboring blades, the inner wall forming the inner radial boundary of the flow passage; wherein the inner wall of one or more of the flow passages comprises means for reducing frictional losses between the flow through the turbine engine and the inner wall. The means for reducing frictional losses may comprise a non-axisymmetrical trough positioned between neighboring airfoils that is configured to reduce frictional losses.

Abstract: A turbine airfoil (22A) is formed by a first process using a first material. A platform (30A) is formed by a second process using a second material that may be different from the first material. The platform (30A) is assembled around a shank (23A) of the airfoil. One or more pins (36A) extend from the platform into holes (28) in the shank (23A). The platform may be formed in two portions (32A, 34A) and placed around the shank, enclosing it. The two platform portions may be bonded to each other. Alternately, the platform (30B) may be cast around the shank (23B) using a metal alloy with better castability than that of the blade and shank, which may be specialized for thermal tolerance. The pins (36A-36D) or holes for them do not extend to an outer surface (31) of the platform, avoiding stress concentrations.

Abstract: A free piston gas compressor has a cylinder, a piston, the piston reciprocable within the cylinder in alternating compression and expansion strokes. A reciprocating linear electric motor is drivably coupled to the piston. A controller is programmed to control or adjust power input to the linear motor on the basis of a relationship including at least one of the present compression stroke or expansion stroke durations, the relationship being indicative of the top dead center (TDC) position of the piston, including in the absence of any collision. In the preferred embodiment the controller obtains a measure reflecting the difference between the compression stroke duration and the expansion stroke duration and adjusts the power input in response to the obtained measure.

Abstract: A control system is provided with an electric water pump that has a sensorless-type brushless motor including a rotor that rotates so as to circulate a coolant between an internal combustion engine and a radiator, and a control device that issues an instruction to stop the brushless motor and prohibits a start of the brushless motor till the rotor stops rotating.

Abstract: A high-pressure compressor (1) for compressing gases, which has at least two working spaces (3, 3?) and is optionally adjustable between a single-stage operating position, in which the gas to be compressed is compressed in one single stage, and a multi-stage operating position, in which at least one working space (3?) is connected in series with at least one further working space (3), wherein at least three working spaces (3, 3?) are provided which all have the same working volume.

Abstract: Disclosed herein is a vacuum ejector pump. The pump is operated by compressed air which is supplied to or discharged from the pump at high speed, thus creating negative pressure in an outer surrounding space. The ejector pump includes a frame having an air inlet pipe, a disc, and an air outlet pipe which are sequentially arranged to be spaced apart from each other. The parts are coupled into a single structure via a spacer. A nozzle is mounted to pass through the center of the disc, and a flexible valve member is mounted to the spacer A nozzle body is accommodated in a cylindrical casing having a hole at a position corresponding to the valve member, and defines a chamber inside the spacer. A locking structure is provided on the casing and the nozzle body so as to prevent the casing, which accommodates the nozzle body, from rotating.

Abstract: A pump unit includes a main pump (4) and a charge pump (5), the pump capacity of which is adjustable via an adjusting element. To adjust the pump capacity of the charge pump (5), an adjusting element of the charge pump (5) is acted upon by an adjusting force which is dependent on the inlet pressure of the main pump (4).

Abstract: A hydrostatic pump (1) has a mechanical displacement volume control with a mechanical control element (4), which for generation of an actuator pressure that acts on a positioning piston (5) which is functionally connected with a displacement setting device (3), has a position-controlled control valve (6) functionally connected with a control lever (30) and with the displacement setting device (3) of the pump (1). A pump with a mechanical displacement volume control with a pressure limiting function can be accomplished by mechanically decoupling the control lever (30) from the displacement setting device (3) whereby a pressure cutoff function is provided, with which, by respective pilot valves (21a, 21b), a pressure signal can be generated from a delivery line (2a, 2b) of the pump (1), which signal is transmitted via the control valve (6) to the positioning piston (5) and counteracts the control pressure.

Abstract: A hydrostatic pump (1) with a variable displacement volume can be operated in a closed circuit and is driven by a drive engine (2), in particular by an internal combustion engine. To control the displacement of the pump (1), a control device (4) is provided which can be actuated as a function of the speed-dependent control pressure which is a function of the speed of the drive engine (2). To improve the control characteristics of the pump, a switchover device (35) is provided, by which the pump (1) can be switched between a speed-dependent displacement control by the speed-dependent control pressure and a volume flow-dependent delivery control, in which the control device (4) of the pump (1) can be controlled as a function of the actuation of an actuator mechanism (28).

Abstract: A multi-chambered pumping system is provided comprising an input cylinder configured to pump a source substance into a vessel and an effluent cylinder configured to receive an effluent from the vessel. The cylinders regulate the pressure of the source substance input into the vessel and recover the pressure of an effluent output from the vessel to pump additional quantities of source substance into the vessel. In each cylinder, a piston creates a boundary between two sections: a fluid section configured to receive working fluid and an effluent or input process section to receive the same. The fluid sections of the cylinders are in fluid communication. A guide rod is attached to each piston and may be operably sized to compensate for a pressure difference between a pressure at which the source substance is pumped into a vessel and the pressure at which an effluent is output from the vessel.

Abstract: A screw compressor comprising: a low pressure stage compressor body; a high pressure stage compressor body that further compresses a compressed air compressed by the low pressure stage compressor body; pinion gears for example, respectively, provided on, for example, a male rotor of the low pressure stage compressor body and, for example, a male rotor of the high pressure stage compressor body; a motor; a bull gear for example, provided on a rotating shaft of the motor; and an intermediate shaft supported rotatably and provided with a pinion gear, which meshes with the bull gear, and a bull gear, which meshes with the pinion gears. Thereby, it is possible to make the motor relatively low in rotating speed while inhibiting the gears from being increased in diameter, thus enabling achieving reduction in cost.

Abstract: Electrically heated pumps are disclosed that include electric heating elements that are linked to a process controller. In a magnetic drive pump, the external jacketing on the pump head, pressure relief valve and casing can be replaced with electric heating elements attached to the pump through the use of adhesive or mechanical fastening devices. For the bracket portion of the magnetic drive pump, the external jacketing can be removed and the heating element is attached to the canister that contains the liquid and that is located between the inner and outer magnetic drive assemblies. Through the use of appropriately placed thermocouples in the head, pressure relief valve, casing, bracket, canister, etc., and a single or multi-channel on/off, proportional or PID controller, the heating zones may be linked together, monitored and controlled to the application requirements. The disclosed pump designs may also be applied to auxiliary equipment such as strainers.

Abstract: An electric compressor includes a built-in electric motor for driving the compressor and a connection section between an external terminal for power supply to the electric motor and the end of a wire from a stator of the electric motor and is stored in a compressor housing. The connection section is constructed from a housing side coupler engaged with the compressor housing, a power supply-external terminal side coupler engaged with the housing side coupler, and a stator side coupler for holding the end of the wire from the stator, fitted to the power supply-external terminal side coupler, and engaged with the housing side coupler. Vibration resistance of a terminal connection section for the motor is improved and breakage and momentary electrical interruption at the terminal connection section may be prevented, with productivity of the compressor maintained at a good level.

Abstract: A fan includes a frame, a motor, a hub and several blades surrounding around the hub. The frame includes a motor base, and the motor is disposed on the motor base and inside of the frame. The motor includes a bushing, a bearing, a shaft and at least one silicon steel sheet. The bushing has an internal wall, an external wall, and a hollow portion disposed between the internal wall and the external wall. The bushing is molded as a single piece and is unitary in construction. The bearing is disposed within the bushing, the shaft passes through the bearing, and the hub is connected with the shaft. The silicon steel sheet is disposed around the bushing.

Abstract: There is provided with a compressor comprising: a compressor main body in which fluid inhaled from an inhale port is compressed, and the compressed fluid is exhausted from an exhaust port; and a pressure retaining device where provided on the exhaust port side of the compressor main body, and retaining pressure on the exhaust port side, wherein the pressure retaining device comprises: a valve body communicating with the exhaust port; an urging member normally urging the valve body into a direction to be closed; and a back-pressure means where an intermediate pressure between the inhale port and the exhaust port of the compressor main body is introduced as back pressure which affects the valve body, and wherein the valve body of the pressure retaining device is openable according to difference between pressure at the exhaust port, and the intermediate pressure of the back-pressure means and force by the urging member.

Abstract: A multi-stage rotary compressor comprises: a casing having a sealed space therein; a driving unit installed in the casing, for generating a driving force; a first compression unit and a second compression unit for receiving the driving force from the driving unit and compressing a refrigerant; and a connection unit for connecting the first and second compression units and guiding the refrigerant discharged from the second compression unit to be sucked directly in the first compression unit and then re-compressed, by which it is possible to vary capacity, even using every plurality of compression units, and to obtain power saving effect suitable for a saving mode.

Abstract: The invention relates to a device and a method for producing nanoparticles, in which method starting materials for nanoparticles are mixed at least as liquid droplets and optionally also as gases and/or vapors with at least combustion gases in a premixing chamber and the mixture is separated for liquid drops larger than size d, whereafter the mixture is conducted to at least one burner, in which the combustion gases are ignited such that a heavily mixing flame is generated, in which the starting materials react and optional solvents evaporate and generate through nucleation and/or sintering and/or agglomeration particles having a diameter of 1 to 1000 micrometers.

Abstract: An apparatus and method for depositing synthetic fibers to form a non-woven web includes guiding the synthetic fibers by a blowing stream through a drawing unit for depositing on a deposit belt. Multiple guidance elements are arranged inside the guidance distance between a blast opening of the drawing unit and the deposit belt, and form a guidance channel above the deposit belt. The guidance elements form a channel opening at a distance from the blast opening of the drawing unit. In order to achieve constant strength in the deposition of the fiber strands, the distance between the outlet of the drawing unit and the channel opening of the guidance channel is larger than half the guidance distance, and the guidance width of an open space formed between the outlet of the drawing unit and the channel opening of the guidance channel is larger than the guidance channel.

Abstract: The present invention is directed to construction tools. The present invention includes tools used for applying mastic or mud to a work surface, for example, a flat box mastic applicator tool, blade assembly, and/or blade adjustment system, that have many improvements too numerous to mention all in the Abstract. The flat box mastic applicator may include unique walls. The blade assembly may have a non-uniform cross section, e.g., a blade holder with thinner areas and/or material removed at various locations along its lateral length. The blade holder may have a larger size outer end(s) to withstand bending or braking. The blade holder may have and arched shape, ribs or bumps for holding a blade more firmly, and a ridge or bump at its outer edge to act as a dam. The blade adjustment system may include symmetrical pins or posts and a tapered leaf spring. See further improvements herein.

Abstract: An intermittent film forming system is provided, comprising a mold having a fine projections and depressions shape formed on the surface, a press for pressing a film to the surface of the mold, a transportation for carrying the film, and a releasing device for releasing the film from the mold surface. The releasing device is provided with a stripper roll for stripping the film, a means for rotary driving the stripper roll, an auxiliary roll arranged substantially in parallel with the stripper roll across a film path line, a means for moving the auxiliary roll on the periphery of the stripper roll such that the film embraces the stripper roll, and a guide for moving the stripper roll and the auxiliary roll in the vicinity of the surface of the mold in parallel therewith, while maintaining the relative positional relationship that the film embraces the stripper roll.

Abstract: Disclosed is an insert molding apparatus employed to form a plastic product with an insert. The insert has an inserting unit and an extending unit. The insert molding apparatus comprises a cope plate, a lower die and a holding mechanism. The cope plate is formed with a cavity. The extending unit dips into the cavity. The holding mechanism is installed on the lower die to hold the extending unit of the insert. When the insert molding apparatus of the present invention is opened, the holding mechanism can hold the extending unit of the insert to prevent the plastic product sticking to the cope plate. Accordingly, it is capable to prevent the plastic product crushed when the insert molding apparatus is closed again.

Abstract: In certain aspects of the invention, an extrusion apparatus for making a multilayer article includes multiple discs, each of which has at least one passageway configured to permit fluid flow therethrough in a flow direction. At least one of the discs includes a cone shaped portion extending substantially parallel to the flow direction.

Abstract: An apparatus for wet granulating a powder material comprises:—a barrel having a granulation chamber and being provided with a first inlet (1) for receiving said powder material and for supplying it to said granulation chamber and with a second inlet (2) for receiving a granulating liquid and for supplying it to said granulation chamber, said granulation having an aperture (9) for discharge of granules from said barrel, and—a transporting means (S) for advancing said powder material toward the end of said granulation chamber while granulating it with the aid of said granulating liquid, said transporting means (S) comprising a first transport zone (4) at its rear end, an agglomeration zone (5) downstream from the first transport zone (4) and a second transport zone (8) at its front end, said first inlet (1) and said second inlet (2) being positioned above the first transport zone (4), wherein said aperture (9) has a shape tightly fitting the terminal portion of the transporting means (S) for directly dischargin

Abstract: To provide a metal mold for forming a preform decreasing the hitting of metal molds at a portion where a slide insert metal mold and a cavity metal mold undergo the sliding yet maintaining the pressure. The metal mold (33) for forming the preform includes a slide insert metal mold (36) split into at least two for forming at least a nozzle portion of the preform, wherein a pressure is maintained by using a fitting portion which includes a preform-forming portion of the slide insert metal mold (36) coupled together from the split state and a cavity metal mold (34). Auxiliary fitting portions (40a, 40b) where the slide insert metal mold (36) and the cavity metal mold (34) undergo the sliding is formed at a position of not forming the preform separate from the fitting portion that includes the preform-forming portion.

Abstract: The invention provides a roll assembly including a pair of cylindrical rolls that are positioned in an opposing cooperating relation for receiving a sheet material therebetween. A plurality of projections on at least one of the rolls extending radially outward from a surface thereof and a plurality of corresponding recesses is provided on the other roll. The projections and corresponding recesses are positioned and arranged on the rolls for contacting and engaging a sheet passing between the pair of rolls. The projections each include an outermost surface portion that is positioned for contacting a discrete portion of the sheet and for entering a corresponding recess on the opposite roll. When rolls rotate about their axes, the projections engage the discrete portion of the sheet material which results in the discrete portion entering the recesses with the projections so as to stretch the sheet in multiple directions.

Abstract: Apparatuses and methods for the production of superfine fibers.