Abstract: A reaction injection machine utilizing a plurality of reactant liquids, including a plurality of supply vessels for containing the reactant liquids, an injection tank and a fixed quantity metering device including a plurality of metering tanks provided for the supply vessels, a plurality of metering pipes for connecting the supply vessels with the metering tanks, and a plurality of supply pipes for supplying to the injection tank the reactant liquids metered in the metering tanks, whereby the reactant liquids are metered in the metering tanks so as to be supplied to the injection tank through the supply pipes and then, are stirred for mixing in the injection tank so as to be injected into a mold immediately after having been mixed.

Abstract: An apparatus for production of a continuous plastic sheet (2) includes structure for the forming of at least one layer cast in the liquid state of this plastic material, or a reaction mixture of reactive components, on a mobile support of glass plates (1) placed edge to edge and carried by a conveyor, followed by the setting of the layer formed on the surface of the glass plates and pulling off the set sheet. Strips (3) of flexible material are inserted between the adjacent glass plates. The adjacent edges of the glass plates are covered, before the casting is performed, by a ribbon (4) of a material nonadherent to the glass, which overlaps the section of the inserted strip or strips. After having been positioned on the glass plates, the ribbon is made temporarily adherent to the latter upstream from the casting in the liquid state by electrostatically charging with opposite charges the glass plates and the ribbon.

Abstract: Apparatus for coextrusion of two plastics materials provided by respective first and second extruders. The first extruder is oriented in a substantially horizontal direction, and the second extruder is positioned above the first extruder and is pivotally movable about a horizontal axis. A electrically powered jackscrew is provided for pivoting the second extruder about the pivot axis for orientation of the outlet of the second extruder with an inlet for an extrusion die. The second extruder is mounted on a carriage that is slidably carried by a support frame so that the second extruder can be moved along its own axis and toward and away from the axis of the first extruder.

Abstract: A dough forming die assembly for the manufacture of machine-made pizza crusts in cooperation with a pizza pan having a generally circular central portion surrounded by upwardly sloping walls joining a horizontal rim. The dough forming die is mounted to a vertically movable base and provided with a generally planar face portion having a surrounding recessed rim. The outer wall of said rim is provided with a downwardly extending thin lip adapted to engage the upper portion of said sloping walls of said pan. A cylindrical, ring-shaped sealing member is mounted to the base for limited slidable movement relative to said die between a raised position and a lowered position engaging said pan and slideably engages the outer wall of said rim.

Abstract: A compression molding apparatus includes a rotatable supporting member and circumferentially spaced molds mounted on the rotatable supporting member. The molds are conveyed successively through a plastic material feed zone, a compression molding zone and a discharge zone by the rotation of the rotatable supporting member. A plastic material in a heat softened state is fed into the molds which are disposed within the plastic material feed zone. Each of the molds include a first mold portion and a second mold portion which defines a mold cavity. The mold is opened and closed by moving the mold portions relative to each other in a predetermined direction. A conduit hole extending from the mold cavity is formed in the second mold portion. Each mold includes a compression rod which slides in the conduit hole. The conduit hole has a plastic receiving portion opened frontwardly in the rotating direction of the rotatable supporting member.

Abstract: A polymer metl delivery system includes a preheated hopper, a high clearance auger, a gear pump, and provisions for delivering heat to the polymer. The resin is melted and fed to the auger and pumped to the gear pump and further pump to an extrusion die. Heat is added to the polymers from the hopper and throughout its course to the outlet connection for the extrusion die. The preheated in the hopper includes heat conductive fins. The system is particularly suited for use in combination with a meltblowing die.

Abstract: An extruder head for producing profiles of rubber and/or plastic mixtures has a stationay main part which has a forward face in which the discharge ends of at least two extruders, rigid with the stationary main part open. The stationary main part has a transverse pivot shaft at one side of the forward face and, at the side opposite the pivot shaft, an abutment which projects forwardly of the forward face. A movable main part is pivoted, with play, on the pivot shaft and is swingable between a closed position in which it overlies the forward face and an open position. An extrusion die unit is disposed between the outboard end of the movable main part and the abutment. Flow channels between the movable main part and the stationary main part lead from the extruders to the extrusion die unit.

Abstract: A melt-spinning apparatus includes a feed device for feeding a molten polymer composition from at least one extruder to a multiplicity of spinning orifices provided by a plurality of spinnerets for producing a multiplicity of discrete continuous extrudates emerging from the orifices in a generally downward direction; quenching devices for cooling the extrudates and for solidifying them to form a multiplicity of discrete continuous filaments; take-up and stretching devices provided downstream from the orifices for contacting and stretching the filaments; the quenching devices include guides for directing at least one stream of a cooling gas having a quenching temperature onto a portion, at least, of the extrudates; the orifices or spinnerets are arranged to form an annular array and a portion, at least, of the quenching devices is provided to direct the cooling gas stream in a substantially radial manner onto the extrudates that emerge from the orifices in the annular array.

Abstract: An extrusion device for producing an article of a heterogeneous blend of incompatible polymers, one polymer forming a matrix and the other being in a discontinuous phase within the matrix. The device is used with either side-fed or center-fed multiple parison die heads. The desired heterogeneous resin structure is formed and maintained by a unique extrusion screw and adapter configuration that avoids division of the melt stream to feed the multiple parison die head after formation of the desired resin structure. This is accomplished by a plurality of arcuate flow passages in the terminal portion of the extrustion screw directly feeding each die. The arcuate flow passages are formed by ribs that extend radially inwardly from the extruder barrel toward a flightless terminal portion of the screw shaft and tip. Circulatory resin flow in the arcuate flow passages driven by the screw rotation forms the desired laminar resin structure.

Abstract: An apparatus for manufacturing large-volume hollow bodies of plastics material with multiple-layer walls. The apparatus defines an accumulation chamber and has a nozzle outlet. A plurality of material layers are joined into a multiple-layer plastic material melt within a tubular plunger which is movable in axial direction of the apparatus. The multiple-layer plastics material melt is conducted in a flow duct which widens in the shape of a funnel toward the accumulation chamber. The tubular plunger is forced by the melt to move in axial direction away from the nozzle outlet. The material melt is ejected as a multiple-layer extruded material by moving the tubular plunger in axial direction toward the nozzle outlet.

Abstract: An improved apparatus for controlling a plurality of die lips arranged in the direction of width of an extrusion molding die through which molten resin is extruded in the form of a sheet (or a film) so as to allow the die lips to be displaced back and forth. The apparatus includes a plurality of stud bolts fastened to the die lip with each bolt having a flange portion for holding Belleville springs which are received below the flange portion of the stud bolt. An arrangement is provided to compress the Belleville springs which includes plurality of adjustment bolts.

Abstract: Disclosed is a device for manufacturing Nd-Fe-B alloy magnet materials, and in particular, for manufacturing an integral, columnar-ring-shaped Nd-Fe-B magnet which is multi-pole-magnetized along the circumference thereof and which is used as the rotor magnet of a high-efficiency stepping motor. The device of this invention is composed of a die punch, an upper and a lower punch having two concentric sections. The space is defined by the die and the upper and lower punches includes induction means for heating the green compact or the densified compact and sealing means for keeping the die under a reduced pressure condition or in an inert gas atmosphere.

Abstract: A plasticating apparatus having a barrel and a screw rotatably disposed therein. The screw has a mixing section including a helical conveying flight to form a helical passage for transporting resinous material along the screw. The mixing section further includes a helical, zig-zag barrier flight spaced from the conveying flight to divide the helical passage into channels of varying cyclic depth in the helical direction of the channels. The portions of minimum depth of the channels define wave crests which are helically displaced from each other. The barrier flight has a first section converging toward one side of the conveying flight, and a second segment diverging away from the same side of the conveying flight. The plurality of first and second segments repeat throughout the mixing section.

Abstract: An apparatus for forming a pellet is disclosed that includes at least one punch that is reciprocably movable through an opening in a die for compressing a granular material, such as uranium dioxide, into a pellet such as the fuel pellets used in the fuel assemblies that generate power in nuclear reactors. The punch is advantageously formed from an alloy consisting essentially of tungsten carbide having a grain size of less than one micron which is embedded in a matrix of cobalt which constitutes between 16.5 and 17.5% by weight of the alloy. The alloy is preferably hot isostatically pressed to achieve zero porosity and a density of approximately 14.0 gm/cc.sup.3. Additionally, essentially pure ingredients are preferably used to avoid interfaces in the resulting alloy which could provide situs for chipping. The resulting alloy has a Rockwell scale A hardness of 89.

Abstract: The preferred embodiment of the shielded counter-rotating spinner assembly for microparticalization of liquid consists of two opposed, coaxial, counter-rotating, conical, sharp-edged spinners whose edges are in close proximity and whose outer surfaces are in close proximity with non-rotating shields which extend to the edges of the spinners. The purpose of the shields is to greatly reduce the spinner induced air drafts so that, when liquids are applied to the inside surfaces of the spinners through the axes of the driving motors, the droplets produced on the edges of the spinners are injected into very low velocity air.

Abstract: A glazing tool which has a handle plate to be gripped between the thumb and forefinger of an operator. Two spaced trim blades have runner edges disposed at an angle to handle plates to trim the bead of glazing material. These runner edges angle toward the distal end of the back plate where a bead contact blade is disposed transversely of the runner edges. Perforate side wings proximal to the bead contact blade rise upwardly and outwardly of the trim blades to guide trimmed glaze material away from the tool.

Abstract: Nozzles for extruding annular shaped plastic products including a stationary column, a rotary head rotatably carried by the stationary column by at least one roller bearing cooperating along at least one cylindrical interface, with the stationary member including at least two supply conduits for the plastic material and the rotary head including a corresponding number of continuation flow passages so that the plastic material can be transferred from the stationary column to the rotary head at the cylindrical interface.

Abstract: An underwater pelletizer (10) has a hub or rotor (24) with a plurality of improved holder and blade assemblies (40) mounted thereon each having a blade (44) carried by a holder body (42). Holder and blade assembly (40) is mounted within an opening (34) defined by boss (32) projecting from hub (24) for relative cushioned movement against an elastomeric washer (62) between the holder and blade assembly (40) and the hub (24).