Abstract: In a method of injection molding elements, a first step is to charge a molding compound into an injection nozzle via a side hole defined in the nozzle under the control of a mini-plunger which is selectively reciprocally movable within a bore of the injection nozzle. In a second step, the mini-plunger is reciprocally moved in the bore of the nozzle for injecting substantially the entire molding compound in the bore of the injection nozzle into at least one cavity of a mold via a separate gate passage defined in the mold. Each gate passage is a narrow capillary aperture that connects the bore of the injection nozzle with a different one of the at least one cavity of the mold. In a third step, the nozzle and the mold are separated after the molding compound in the gate passage is cured but before the molding compound in the at least one cavity of the mold is cured. In a fourth step the molded element is removed from the at least one cavity of the mold once the molding compound therein is cured.

Abstract: This invention relates to an injection unit for an injection molding machine, which is free of inconvenience such as a reduction in ability and clogging of a powdery filler upon molding a powdery-filler-added resin, can prevent cutting of long fibers upon molding a long-fiber-filled resin, can also be applied to feed resins which give off evaporated gas, can be used for a wide variety of resins, and can be constructed with a substantially-reduced machine length. The injection unit is therefore constructed of a tank and an injection cylinder. The tank has a built-in mixing rod with numerous fins extending from the mixing rod, whereby a feed resin is plasticized by rotation of the mixing rod. The injection cylinder is connected with the tank and has a built-in injection plunger, whereby a molten resin fed from the tank is injected into a mold by the injection plunger.

Abstract: A preplasticizing type injection apparatus having an injection cylinder internally provided with an injection plunger and a plasticizing cylinder provided in the inside with a plasticizing screw or plunger, the injection and plasticizing cylinders being arranged in juxtaposition and held in communication with each other by way of a resin conduit connecting an inlet path of the injection cylinder arranged at the front end thereof and defining the limit of advancement of the plunger and an outlet path of the plasticizing cylinder arranged at the front end thereof so that a front end portion of the injection cylinder is charged with resin molten in the plasticizing cylinder and the resin in the front end portion of the injection cylinder is injected into a mold by the plunger, characterized in that the resin conduit is realized in the form of a small metal pipe having an inner diameter between 5 and 10 mm and a length at least five times and preferably twenty to forty times greater than the inner diameter of the

Abstract: One or several molten materials are extruded at low pressure from one or several continuous plasticizers through central stationary nozzles via individually circumferential flow passages of common distribution spools directly into individual extendable transfer reservoirs. From there, the molten materials are transferred in a continuous cascading manner into secondary transfer reservoirs to be subsequently transferred and condensed within mold cavities into finished molded articles. The central stationary nozzles and stationary primary displacement plugs are grooved with lateral longitudinal melt-flow channels to allow the conveyance of molten materials across intersecting molten material passage ways during the extending movement of the manifold assembly. The molten materials are conveyed through secondary displacement plugs into secondary transfer reservoirs by external cylinders, retracting the manifold assembly on adjustable-length spacer rods in unison against the stationary primary displacement plugs.

Abstract: An injection molding apparatus for processing thermoplastic materials has at least one plasticizer unit, at least one injection molding cylinder with associated emptying piston, and at least one injection molding mold. The injection molding cylinder is provided with a sleeve which is arranged reciprocally between a position in which communication with the injection molding mold is interrupted and a position in which communication with the injection molding mold exists. In the position in which the communication with the injection molding mold is interrupted, a passage is provided between the sleeve and the housing which is connected between the feed conduit from the plasticizer unit and a storage space defined on the inside by the sleeve. The outside diameter of the ejection piston is slightly smaller than the inside diameter of the sleeve so that remaining between the two is an annular gap through which the plastic material passes into the storage space from one end of the sleeve.

Abstract: This plant for manufacturing fiber-reinforced thermoplastic structural components, especially for motor vehicles, is characterized in that it includes:means (1) of continuous production of a dough of a fiber-reinforced thermoplastic compound, receiving as input, on the one hand, the thermoplastic (4) and, on the other hand, the reinforcing fibers (6);means (14) of accumulation and of temporary storage of the dough produced; andmeans (26) of removing the dough from the accumulation and temporary-storage means (14) and of introducing this removed dough into a mould (29) for forming the component.

Abstract: An injection apparatus capable of carrying out injection and filling of a resin and injection of a gas making use of an injection screw or injection plunger for the injection of a high-pressure gas comprises an injection screw 5 having a conical injection head 3 at the front end thereof and a ring valve 4 around a rear portion of the injection head, an injection cylinder the interior of a front end portion of which equipped with a nozzle member is formed as a tapered surface in accordance with the injection head 3 and can be closed by its contact with the injection head 3 and which contains the injection screw 5, gas flow passages 12 and 8 provided from the front end of the injection head 3 to a rear end portion of the injection screw 5, an opening/closing pin 17 inserted into the gas flow passage 12 in the injection head in such a manner that it can move together with a piston at the rear end of the injection head, and an actuation gas flow passage 10, provided inside the gas flow passage 8, for applying pre

Abstract: An injection molding apparatus includes a nozzle which is directly connected to a mold for injecting a molding material into the mold. The mold defines at least one cavity in the shape of a element to be molded and at least one gate passage, each gate passage interconnecting a separate cavity with the nozzle. The shape of the gate passage permits a rapid curing of any residual molding material, and permits separation of the mold and the nozzle before the molding material in each cavity is cured. The nozzle is then used for a subsequent procedure or molding process while the molding material in the cavity cures. The nozzle defines a first bore and a second bore arranged longitudinally in sequence, and a side hole for introducing the molding material into the first bore. The nozzle includes a first plunger which is selectively reciprocally movable in the first bore, and a second plunger which is selectively reciprocally movable in the second bore and in a central bore defined in the first plunger.

Abstract: An arrangement of oil cylinders of a plastic injecting machine is provided which positions a large oil cylinder and a small oil cylinder respectively on both the left and right sides of an oil cylinder base and a bearing base. The large and small oil cylinders are located at such a distance away from a material injecting cylinder that the oil seals of the four oil cylinders are not heated by the electric heaters that heat the material injecting cylinder. By this arrangement, the oil seals have a normal service life. In addition, an oil route plate is located on the bearing base to secure oil pipes formed of hard steel connected between the four oil cylinders and an oil pump, to keep oil flowing smoothly.

Abstract: An injection apparatus having a pressure holding device of a novel constitution, capable of preventing flow-out and decrease of resin when holding pressure, and eliminating instability in pressure holding due to volume changes, by forming the front end of the pressure holding plunger obliquely disposed between front and rear resin paths or penetrating a passage between the resin paths.

Abstract: An injection unit (1) for injection molding machines used in the manufacture of plastic objects has a nozzle element (2), a material feed system (7), a cylinder-piston unit (3, 4) arranged between the nozzle element (2) and the material feed system (7), a valve (10) arranged between the cylinder (4) and the material feed system (7), and a device (21) for pressing the nozzle element (2) to the edge of the gate of an injection mold. The nozzle element (2), and the piston (3) guided in the cylinder (4), may be integrally formed. The nozzle element has a channel (11) in alignment with an axial bore (13) in the piston (3). The channel (11) and bore (13) are in communication with the interior of the cylinder. The cylinder (4) can be moved in the direction of the longitudinal axis of the piston while the piston (3) does not move.

Abstract: A pre-plasticization type injection molding machine is equipped with a plasticizing part for plasticizing synthetic resin material by turning a screw in a heating cylinder and an injection part for injecting the plasticized material through a nozzle by advancing and retreating an injection plunger into and from an injection cylinder. A conduit connects the tip of a plasticizing chamber, consisting of the heating cylinder, with the tip of an injection chamber consisting of the injection cylinder. The screw advances at the time of injection, closes the conduit with its tip. The opening of the conduit in the injection chamber is arranged on the periphery of a nozzle side-wall. An injection passage extends from the injection chamber toward the nozzle, the passage being open to the center of the nozzle side-wall.

Abstract: A flow regulating assembly for restricting plastic material from flowing directly from a central chamber of an injection piston to an accumulator cavity of a plastic injection machine and instead directing the plastic material towards the wall of the accumulator cavity thereby providing a scouring effect and reducing build-up of the plastic material on the wall of the accumulator cavity. The flow regulating assembly includes a valve member having a central opening located proximate to and in corresponding alignment with the central chamber of the injection piston and four branch passageways extended from the central opening of the valve member to external openings in a circumferential groove in an outer edge of the valve member, the outer edge of the valve member which is concentric with and proximate to the wall of the accumulator cavity. Four channels are located on a conical-shaped head portion of the valve member proximate to the circumferential groove.

Abstract: A downsized screw driving gear supports a heavy reaction force from a screw used in preplasticization type injection molding machine. Motor rotation is directly transmitted to the screw during plasticizing by a piston member. Reaction forces from the screw are supported with a thrust bearing arranged in a hydraulic chamber, while the radial load of the piston member is supported with bushes. Hydraulic pressure is supplied to the hydraulic chamber in the injection process to advance the screw with the piston member, disconnecting a path to the injection chamber. Oil supplied from the hydraulic chamber immerses the thrust bearing and penetrates to the sliding faces of the bushes.

Abstract: A resin article is made between an outer concave mold part and an inner convex mold part that can fit together so that respective surfaces form a substantially closed mold cavity. This is done by first lining the surface of the outer mold part with a liner sheet and then fitting the lined outer mold part to the inner mold part to form the substantially closed mold cavity. A portion of the surface of the inner mold part is positioned to form a pocket open inward into the cavity and this pocket is filled with a mass of fluent synthetic resin. The surface portion is then pressed inward while the parts are fitted together and without otherwise relatively moving the mold parts to force the resin mass from the pocket into the cavity until the inner-part surface portion lies substantially flush with the rest of the inner-part surface.

Abstract: A mixing head for a mold can receive two or more reactive synthetic resin components in a mixing chamber in which a mixing-chamber piston is displaceable to drive the residues into a first calming chamber communicating with the outlet of the mixing chamber. The first calming chamber also has a piston or plunger which can be advanced to drive the residues into a second calming chamber connected to the outlet of the first calming chamber. The second calming chamber has a second piston displacing the mixture into the mold cavity. Because the pistons of the first and second calming chambers can be retracted as the mixture flows through these chambers, a highly effective calming effect can be obtained for the turbulent mixture of the mixing chamber without throttling.

Abstract: A system of injection molding by an injection machine with a mold includes conventional fundamental steps including a material plasticizing and metering step, a material injecting step and a material pressure-holding step, but with an additional feature in that nozzle passage is interrupted midway therealong from communication between the interior of a machine body and a mold cavity, after the injecting step but while the material pressure-holding step is being carried out. The material pressure-holding step is carried out first using the injection machine per se operated with a plunger to exert a first non-stepped external or internal pressure on the entire injected material but second using another mechanism for exerting a second non-stepped or stepped internal pressure on a forward portion of the injected material separated due to the nozzle passage interruption.

Abstract: A process for distributing wax or a similar substance in semi-solid form which uses a liquid wax supply system, a wax conditioning system including a heat exchanger which cools the wax to a semi-solid state and an accumulator for storing conditioned wax until needed, and a die press or similar work station which receives semi-solid wax from the accumulator in a continuous stream or flow. Such a system allows a lost wax die press to operate without need to manually open and reload the press with wax. An automated control system according to the invention allows die press reloading to occur automatically when needed, and operates the wax conditioning system as needed to maintain a supply of wax in the accumulator. Wax tunnelling problems are avoided by means of a piston disposed in the heat exchanger which is movably interposed between hot liquid wax entering the heat exchanger and cooler, semi-solid wax leaving the heat exchanger.

Abstract: In a process for forming composite laminate parts from reinforcing fibers and resin, a mold is selected which has a mold cavity having a part definition surface therein and a resin passageway leading to the cavity. An expansion member capable of expanding to a larger volume in response to heat is located in the cavity in conjunction reinforcing fibers which will form a part of the composite laminate part. The mold cavity is closed and resin is injected through the resin passageway to saturate the fibers. The expansion member is heated to expand the expansion member an amount sufficient to consolidate the resin and the reinforcing fibers between the expansion member and the part definition surface to shape the fibers and the resin into a component laminate part mimicking the shape of the part definition surface and to expel any excess resin from the cavity to the passageway.

Abstract: A hot runner system for injecting precise quantities of at least one resin advancing under pressure from a resin source wherein the system includes a shooting pot having a piston with opposed working surfaces which divide the shooting pot into at least two reservoirs. Resin under pressure is switched cyclically from one reservoir to the other whereby the piston is driven by resin under pressure to purge one reservoir while the other reservoir is loaded.

Abstract: An apparatus for forming an annular liner is equipped with a molding assembly which includes a press tool assembly and an anvil. The container closure shell is fed onto the anvil. The press tool assembly has a resin flow path and a means for forcibly flowing a synthetic resin material through the resin flow path. A notch is formed in the upstream portion of the resin flow path. When the molding assembly moves with respect to the feeding nozzle, the synthetic resin material discharged from the discharge port of a feeding nozzle enters into the upstream portion of the resin flow path via the notch, and is cut away from the feeding nozzle.

Abstract: An apparatus (20) for batch molding open-cell soft polyurethane foam within a mold (22a,22b,104) is provided by introducing into a mixing chamber (26) of a mixing pot (24) a highly activated polyol component and an isocyanate component which are mixed and permitted to foam to provide upward expansion in a viscous state through an upper outlet (28) by free rise that fills the mold (22,104). Such batch molding provides "one age of foam" that enables molding to be performed which was not previously possible. Both a rigid mold (22) and a flexible mold (104) can be utilized. The mixing pot (24) includes a mixer 38 preferably embodied by a rotatable screw (74) that is moved axially to purge the mixing chamber (26) of foam after each cycle.

Abstract: Apparatus and method for injecting a shot of flowable material into a mold involve moving a plunger-type injector in a continuous non-decelerating manner past an outlet which leads to the mold. The injector is decelerated, but only after it passes the outlet to the mold.

Abstract: A fast cycle plasticator/injector unit for plastic molding machines having a screw type plasticating extruder for feeding thermoplastic material through a sealed fluid flow path to an accumulator which periodically feeds the thermoplastic material through a sealed fluid flow path to an injector that comprises a cylinder with an inlet and an outlet port and a powered piston valve element disposed for reciprocating axial and rotary motion within said cylinder and having a fluid flow channel along a portion of its length in cooperative structural relationship with said inlet port to provide an open fluid flow channel between the inlet port and the charge chamber of said cylinder when the piston is in a first rotational orientation and to block fluid flow from the inlet port to the cylinder when the piston is in a second rotational orientation.

Abstract: A metering device, a shooting pot, useful in the hot runner system of an injection molding machine including a piston cylinder assembly where the piston is movable in a first direction to effect a valve action and in a second direction to advance a metered volume of thermoplastic material.

Abstract: An injection molding machine having an extruder, a nozzle, and an housing mounted between the extruder and nozzle. The housing encloses a pressure assist nozzle and a fluidic passage connecting the extruder and the extruder nozzle. A bore within the housing extends into the fluidic passage to define a portion of the passage between the extruder and the extruder nozzle. The bore has an aperture within a side wall which acts as a valve opening within the passage which, when closed, prevents flow between the extruder and the nozzle. An annular sleeve is reciprocated within the bore between a retract position, in which the annular sleeve is withdrawn from the passage, and an extend position, in which the annular sleeve is projected into the passage so as to close the aperture. A plunger piston reciprocally resides within the annular sleeve. The plunger piston is held in a retracted position by the annular sleeve while the annular sleeve is in its retracted position.

Abstract: A system and method of controlling hold pressure applied to molding cavities of a stacked multi-parting injection molding system having desynchronized injection periods while cyclic injection molding a plastic material. A combination of the center molding block and an injection system together provide an adjustable feed system. The feed system is adjusted to enable plastic material to be fed from the injection system through a left branch to the left molding cavity. The injection system is pressurized to inject the plastic material through the left branch to fill the left molding cavity. The injected plastic material is confined within the left branch and the left molding cavity; and the confined plastic material is hold pressurized by a movable packing element. A like sequence of steps is followed to hold pressurize the right molding cavity.

Abstract: An apparatus for supplying a resin material to molds of a resin press molding machine includes a supply cylinder for supplying the resin material to the molds, resin material charge hopper mounted to the supply cylinder, a plunger for extruding the resin material within the supply cylinder, a drive device for moving forward and backward the plunger in an axial direction, an opening and closing device for opening and closing an opening of a fore end of the supply cylinder, and a die positioned between the opening and closing device and the molds to form the resin material into a predetermined shape.

Abstract: An apparatus for the extraction of melt samples, particularly from continuously operating plastics processing plants, has a test sample mould which is connected to a melt channel via a transfer channel. There are provided a shutoff device and a device for transferring the melt into the mould. In the transfer channel there is arranged a suction piston which sucks the melt out of the melt channel into the transfer channel which in this case is opened simultaneously. In addition, there is provided a pressure piston for injecting this melt into the moulding chamber. An apparatus of particularly simple construction is created in this way and permits extraction of melt samples without the melt coming into contact with the atmosphere, no dead spaces at all being created at the same time in the melt channel during the time when no melt samples are extracted.

Abstract: A manifold assembly of the type used for conveying plastic injection molding material from a central injection point or sprue to a number of mold cavities or to multiple points within one large mold cavity. The assembly includes an integral manifold and a plurality of nozzles extending radially outward therefrom. Insulating rings are disposed about the nozzles for inhibiting heat transfer between the nozzle and the core or cavity and a stainless steel locating ring is disposed between the sprue and a support member, which supports the assembly. The locating ring inhibits heat transfer from the sprue to the support member. Aluminum plugs are disposed at the terminal ends of the manifold and inhibit heat transfer from the terminal ends. Preload pads are removably secured to the manifold radially opposite the nozzles for insulating and supporting the manifold under pressure. Heater bands supply the heat to the assembly and the temperature of the plastic injection molding material is monitored by thermocouples.

Abstract: A technique including an apparatus for injection molding fiber-reinforced thermoset plastic articles is disclosed. The technique includes forming a mixture of short lengths of reinforcing fibers with a thermosetting resin in a predetermined fiber-to-resin ratio and introducing the mixture to an injection molding cylinder. The volume of mixture introduced is at least a multiple of two of the volume of the mold chamber so that the injection plunger traverses the intersection between the molding cylinder and a stuffer cylinder a single time for a multiplicity of molding shots to minimize fiber breakage and balling. The injection plunger is adapted to precompact the mixture by being forced forward until a predetermined high pressure is sensed, indicating a hydraulically locked condition of the plunger wherein substantially all entrapped gases have been expressed from the mixture and there exists no substantial forward movement of the plunger.

Abstract: The present invention increases the shot capacity and the screw recovery time of an injection molding machine without increasing hydraulic pump capacity or motor horsepower. In accordance with one aspect of the invention, an existing injection molding machine is retrofitted with two cylinder and piston arrangements which are bolted onto the machine between its plasticizer barrel and its melt manifold. One of the cylinder and piston arrangements is employed to perform a mold-filling operation, whereas the other cylinder and piston arrangement is employed to perform packing and suck back operations.

Abstract: A technique directed to a process for injection molding fiber-reinforced thermoset plastic articles is disclosed. The technique includes forming a mixture of short lengths of reinforcing fibers with a thermosetting resin in a predetermined fiber-to-resin ratio and introducing the mixture to an injection molding cylinder. The volume of mixture introduced is at least a multiple of two of the volume of the mold chamber so that the injection plunger traverses the intersection between the molding cylinder and a stuffer cylinder a single time for a multiplicity of molding shots to minimize fiber breakage and balling. The injection plunger is adapted to precompact the mixture by being forced forward until a predetermined high pressure is sensed, indicating a hydraulically locked condition of the plunger wherein substantially all entrapped gases have been expressed from the mixture and there exists no substantial forward movement of the plunger.

Abstract: The invention relates to injection molding and is provided with a heating cylinder, an injection nozzle disposed at the forward end of the heating cylinder, a resin feed means, such as screw, which feeds molten resin to a portion in the vicinity of the forward end of the heating cylinder. Also provided is a piston means, such as a plunger, which has a stop valve mechanism that closes when it is moved in an injection direction and is opened when it is moved in a counterinjection direction and injects molten resin, fed to a portion in the vicinity of the forward end of the heating cylinder, into a cavity through the injection nozzle, whereby, through driving of the resin feed means and the piston means, charging of molten resin into the forward end of the heating cylinder and injection of the molten resin into a cavity are carried out partially concurrently.

Abstract: Apparatus for forming filled dough products comprising: piston extruders for pumping dough and filling to measuring devices which extrudes external dough tube with internal filling through a die head so that part of the dough tube of one item is extruded without filling, a twisting device for turning just extruded item around its longitudinal axis and twisting the empty part of the dough tube, and pinching device for forming closing and separating ends of the items.

Abstract: A die casting apparatus for pumping molten metal from a heated container to a nozzle communicating with an inlet of a mold including a charging mechanism for charging the apparatus with a predetermined amount of molten metal from the container and a multi-piece holder removably joined together by fastener means. The holder defines a shot barrel chamber and a gooseneck chamber extending in a curved path from the charging mechanism to the nozzle. A refractory shot barrel is removably positioned in the shot barrel chamber in communication with the molten metal in the heated container, and two refractory insert halves are removably positioned in the gooseneck chamber and coact to define a gooseneck passage at their parting interface providing fluid communication between the outlet of the shot barrel and the inlet of the nozzle.

Abstract: A die casting apparatus for pumping molten metal from a heated container to a nozzle communicating with an inlet of a mold including a charging mechanism for charging the apparatus with a predetermined amount of molten metal from the container and a multi-piece holder removably joined together by a fastener. The holder defines a shot barrel chamber and a gooseneck chamber extending in a curved path from the charging mechanism to the nozzle. A refractory shot barrel is removably positioned in the shot barrel chamber in communication with the molten metal in the heated container, and two refractory insert halves are removably positioned in the gooseneck chamber and coact to define a gooseneck passage at their parting interface providing fluid communication between the outlet of the shot barrel and the inlet of the nozzle.

Abstract: An apparatus and method for molding polycarbonate lenses is disclosed in which the lenses are formed in a single injection molding operation. Polycarbonate is injected into a cavity between two movable dies which are forced apart by the injected polycarbonate. These dies are then urged together forcing a portion of the injected polycarbonate back through the same port through which the polycarbonate was injected. The finished lens does not have the knit line normally associated with injection molded lenses.

Abstract: An injection molding machine having in spaced positions at least a first injecting station for injecting a plasticized resin material into a die cavity and a second station for further treating the injected resin material concurrently and in relation with the injecting operation at the injecting station, the molding machine including a die carriage movable to and from the first and second stations and fixedly supporting thereon at least a lower die of an injection molding die set; a track for guiding movements of the die carriage to and from the respective stations; a carriage clamp for fixing the die carriage at the respective stations; a die closing mechanism provided at each station for releasably clamping an upper die against the lower die; and a drive mechanism for moving the die carriage sequentially to the first and second stations.

Abstract: An extrusion head for use in blow molding machines for molding parison having a single layer or wall or a plurality of layers or walls, in which a plunger is slidably interposed between a head body and a core and the plastic material is successively accumulated in an accumulation chamber defined between the extruding end of the plunger, the head body and the core so that the faster the plastic material is introduced into the extrusion head, the faster it is extruded.

Abstract: An injection apparatus for plastics materials containing glass reinforcing fibers includes a fixed sheath 5, a movable sheath 7 slidably disposed within the fixed sheath, a mixing screw 9 rotatable within the movable sheath, a pressurized supply hopper or funnel 8 for feeding material to the mixing and conveying screw, and a piston/cylinder unit 14-16 for advancing the movable sheath and screw to inject a charge of plastics material within a chamber 26 to a mold M. The supply funnel is coupled to the movable sheath and includes a compression plate 35 controlled by a jack 38 mounted on a sliding plate 39, whereby the compression plate may be retracted into abutment with the sliding plate and laterally withdrawn to enable the reloading of the supply funnel.

Abstract: The method and apparatus for the injection of an injection material into a mold includes an upright extruder mechanism having an upright feed screw driven from its lower end. Material introduced at the top of the extruder is fed by the screw outwardly of the extruder through an outlet projected laterally outwardly from the extruder at a position adjacent the lower end of the screw. The extruder outlet constitutes a piston receivable with a cylindrical material chamber of an injection nozzle unit. Material is fed in one direction in incremental amounts from the extruder and into the material chamber when the extruder is moved in one direction relative to the injection nozzle unit, and is then forced from the material chamber by the extruder outlet and into the nozzle unit for injection into a mold when the extruder is moved in an opposite direction relative to the nozzle unit.

Abstract: An improved injection unit for a plastic materials injection molding machine, having a plastification cylinder and a cooperating rotatable and axially movable plastification screw, both supported and guided on tie rods by means of a carrier bridge, the plastification cylinder being axially adjustable and clampable in relation to the carrier bridge by means of a threaded adjustment nut cooperating with a threaded end portion of the plastification cylinder and a central threaded clamping sleeve cooperating with a stationary thrust plate, the latter being permanently secured to the carrier bridge.

Abstract: A molding apparatus for molding a pressurized plastic material of the nature of ground meat or other food such as ground fish and the like in which the apparatus comprises a movable mold having a mold opening for receiving a pressurized charge of the material, with the mold being movable between mold opening filling and article discharge positions, an entrance to the mold opening at the filling position, means for directing the pressurized charge through this entrance at the filling position and into the mold opening and vent means spaced from the mold opening entrance for venting from the mold opening air displaced by the pressurized charge entering the mold opening. The vent means comprises a plurality of elongated slots extending from the mold opening in the filling position on the side opposite to the mold entrance and exhausting to the exterior of the apparatus.

Abstract: A mixing valve is located at the opening of a mold cavity to control the flow of a fast setting mixture into the mold and to mix the ingredients forming the mixture immediately prior to dispensing into the mold. The valve includes a plurality of mixing elements on a mixing head which rotates about its own axis within the valve housing and which cooperates with the housing to define a mixing chamber receiving the ingredients. When the valve is open, the plurality of mixing elements supported from the head in the mixing chamber are rotated with the head to mix the ingredients into the fast setting mixture. The head also reciprocates along its axis to open and close the valve and completely fills the chamber to eject the mixed ingredients when the valve is closed.

Abstract: Apparatus for coating one surface of a molded article that consists of a pair of relatively movable die members which when closed form a cavity for molding the article in a desired configuration. One of the die members has a chamber formed therein into which a predetermined amount of liquid coating material is supplied through an injector device which is selectively movable into and out of engagement with an inlet port formed in the die member that communicates with the chamber. After the chamber is charged with the coating material, a plunger forces the material into the cavity to coat the outer surface of the article while the die members are closed.

Abstract: The invention pertains to a device for the fabrication of hollow plastic bodies, of the type comprising a core carrying plate, a double mould plate, means to inject plastic material into said mould plate and means to press said three plates against each other at the proper time, characterized in that it further comprises a metering plate fixed to one of said mould plates, as well as a hydraulic metering control plate facing said metering plate, said metering plate and hydraulic control plate being so conditioned to introduce, in a first step, a metered quantity of material in said metering plate and to transfer, in a second step, this quantity of material from the metering plate into the mould carrying plate, before the force-dieing resulting from pressing said plates together.