Abstract: In a method of making an electrically conductive electrode member, a compound material, containing a binder made of polymer plastic and 80 weight % of a powdery electrically conductive material as filler, is introduced into a plasticizing screw of an injection molding machine for transforming the compound material to a plasticized material and discharging the plasticized material via a nozzle having a length of less than 15 mm for subsequent injection molding. The injection molding machine is constructed throughout a material flow passage from a point of introduction of the compound material to the injection mold to have only tapered portions which narrow a flow cross section by not more than 10:1.

Abstract: A method of producing a composite plastic molded article having at least one layer of web material and a plastic body, includes placement of the web material between mold halves of an injection mold and deforming the web material through closing of the mold. Subsequently, negative pressure is applied on one side of the web material and/or excess pressure is applied on its other side, so that the web material bears upon a mold half. Plastic mass is then introduced into the opening mold in such a way that the feed rate of the plastic mass and the opening speed of the injection mold are coordinated with each other. Once a certain opening gap has been reached, the mold is closed and the plastic article is embossed.

Abstract: In a method of controlling the feed amount of compounding materials for a compounder-type injection molding machine with a plasticizing unit, an injection unit, receiving plasticized material from the plasticizing unit, and a metering unit for supply of starting material into the plasticizing unit, the volume of a mass stream downstream of the plasticizing unit is ascertained and the metering unit is operated in response to the ascertained volume.

Abstract: An apparatus for manufacturing semi-finished products and molded articles of metallic materials includes an extruder for producing a flow of the metals, with appliances being connected thereafter for shaping the semi-finished products and the molded articles. The extruder has a screw system consisting of two or more meshing screws. This design has an improved functionality and can produce components with reproducible quality.

Abstract: In a method of safeguarding an injection molding machine against execution of a faulty operation, a movement state of a moveable component, e.g. a moveable mold mounting plate of an injection molding machine, is monitored as a drive for the component is activated. Upon detection of no movement or only a minimal movement of the component, the drive is deactivated by a controller.

Abstract: An extruder screw for processing plastic material, in particular for a plasticizing barrel of an injection molding machine, has at least one screw flight divided along its length into successive zones including a mixing and transformation zone for plasticizing plastic material and a subsequent discharge zone for expelling plastic material. The screw flight is formed in the mixing and transformation zone with at least one breach to define a through passage for return of a partial mass flow to a neighboring screw turn, whereby the screw flight extends towards a discharge end of the discharge zone of the extruder screw along a helical line having same thread direction and being offset in axial direction in the area of the breach.

Abstract: Integrated in the mixing head of a polyurethane apparatus for producing a mixture stream of chemically reactive plastic components, is a cutting arrangement by which natural fibers or fiber strands of soft-elastic and tough consistency can be drawn from a continuous strand and, after cutting into fiber pieces of given length, can be introduced into the mixture stream. The cutting arrangement includes an inner guide tube which receives a fiber strand, drawn from a continuous fiber strand by two feed rollers, and fed via the guide tube and an outer support tube to rotating knife elements. By subjecting the guide tube to a vacuum and applying a compressed gas stream to the end of the outer support tube, the soft-elastic fiber strand is held straight in a manner which is optimal for the cutting process. The cut fiber pieces are introduced together with the gas stream into the mixture stream of chemically reactive plastic components.

Abstract: A container for homogenizing and heating or cooling a liquid working medium is disclosed. The container includes a tubular heat exchanger disposed in the interior space of the container, with the liquid working medium flowing through flow-through tubes of the heat exchanger that are in contact with a heat-exchange medium, A cup-shaped baffle which Is formed of a partition wall and a cover secured to an end of the partition wall proximate to the medium outlet of the flow-through tubes surrounds the heat exchanger and subdivides the interior space of the container between the tubular heat exchanger and the container wall in at least two concentric annular spaces, with each of the concentric annular spaces containing the working medium. The container is suitable for homogenization and heating of polyol components in a polyurethane injection molding apparatus.

Abstract: Apparatus for producing thermoplastic injection-molded parts reinforced with long fibers, includes a compounder having two meshing screws rotating in a same direction for continuously generating a stream of melt of thermoplastic material reinforced with long fibers. Melt is alternatingly conducted to at least two piston and cylinder units for injection into at least one cavity of an injection mold at a suitable pressure. Each of the piston and cylinder units includes a cylinder and a differential piston movably received in the cylinder and dividing the cylinder into a feed chamber and an injection chamber, wherein the piston has a relatively greater piston surface, adjacent the injection chamber, and a relatively smaller piston surface, adjacent the feed chamber.

Abstract: A plastics injection molding machine includes a heatable plasticizing cylinder, having an inlet side for incoming plastic material and a machine drive, and an injection mold receiving the plastic material from the plasticizing cylinder for making an injection molded article. Acting between the machine drive and the inlet side of the plasticizing cylinder is a heat transport system for preheating the incoming plastic material with waste heat generated by the machine drive to thereby realize a recovery of energy.

Abstract: A rotary device for a horizontal injection molding machine is disposed between a moveable mold mounting plate and a fixed mold mounting plate of the injection molding machine and includes a base plate and a turntable, which is supported on the base plate for rotation about a vertical rotation axis and supports a swivel plate for interaction with the moveable and fixed mold mounting plates. The rotary device further includes an eccentric structure for displacement of the turntable in horizontal direction to thereby enable a precise position of the swivel plate between the moveable and fixed mold mounting plates.

Abstract: A plunger-type injection molding unit includes a cylinder in which a plunger is accommodated for axial displacement. The plunger has an end face to define with the cylinder an antechamber which receives melt through an inlet port. The cylinder has an injection port in substantial confronting relationship to the end face of the plunger, whereby a flow of melt through the injection port is regulated by a closing mechanism. The plunger is provided with a flow channel for conducting melt from the antechamber, whereby the flow of melt through the flow channel is regulated by a closing device.

Abstract: A rotary device for a horizontal injection molding machine is configured in the form of a module frame which includes a base plate and a turntable rotatably mounted on the base plate. Drives are provided to move the base plate in longitudinal direction and to rotate the turntable. A fixed mold mounting plate of the injection molding machine can be mounted on a mounting structure of the module frame, whereas a moveable mold mounting plate is received in guides along the sides of the module frame.

Abstract: A closing unit for plastic molding machine includes a lower mold mounting plate, and an upper mold mounting plate, which are moveable via a pivot bearing between an open position and a closed position and can be locked in the closed position by a locking mechanism. The upper mold mounting plate is pivotable by a crank drive relative to the lower mold mounting plate, whereby the closed position is suitably commensurate with a dead center position of the crank drive. The lower mold mounting plate may be swingably mounted and includes locking members to secure the lower mold mounting plate in at least one pivot position. Further locking members are provided to secure the upper mold mounting plate in the open position.

Abstract: A cooling station for data carrier disks, in particular for injection-molded substrates of optically readable data carriers, such as CD, CD-R, DVD, CD single, DVD single and the like, has at least three rotatable cooling spindles which are arranged in spaced-apart parallel relationship such that a substrate bears simultaneously upon all cooling spindles. Each cooling spindle has at least two threads with thread grooves of different width to thereby accommodate in the same cooling station, e.g. CD substrates and DVD substrates. As an alternative, or in addition, four or more cooling spindles may be provided and arranged in such a manner that respectively three cooling spindles are provided for transport of substrates with a particular substrate diameter. In this way, substrates of different diameter, e.g., standard CD and CD single, can be accommodated in a same cooling station.

Abstract: In a compounder-type injection molding machine having an extruder for continuously producing a melt and at least one injection device is fluidly connected to the extruder to receive melt, a reservoir is provided which is in fluid communication with the extruder as well as with the injection device for temporary storage of melt. In order to maintain a pressure at a desired level at the outlet of the extruder, a pressure sensor is provided for ascertaining a melt pressure state downstream of an outlet of the extruder. The pressure sensor outputs a signal, commensurate with the melt pressure state, to a control unit for activating a drive in the reservoir or a drive in the injection device in response to the signal according a predetermined algorithm.

Abstract: An injection unit for injection molding machines includes an extruder as plasticizing unit and a plunger-type injection molding device that can be coupled to the injection molding machine by an injection nozzle. The plunger-type injection molding machine has an injection plunger, wherein the area in front of the injection plunger forms an injection space which is connected to a forward end of the extruder by a melt channel, with a shutoff valve disposed in the melt channel. The extruder can be continuously operated and has one or more plasticizing screws for plastification, wherein the extruder is so configured that a backup length is able to increase backwards into the extruder, when the shutoff valve is closed.

Abstract: The invention relates to a device for vacuum-pressing of disk-shaped substrates, in particular DVD substrates into a finished DVD, wherein the device has a vacuum chamber with two substrate holders and an intermediate element that can be displaced inside the vacuum chamber; and wherein the intermediate element divides the vacuum chamber into a first low-pressure chamber and a second chamber that can be alternatingly connected to vacuum or to an overpressure, which makes the device particularly suited for use with a hot-melt thermoplastic adhesive.

Abstract: The apparatus is described for manufacturing semi-finished products and molded articles of metallic materials. The device incorporates an extruder for producing a flow of the metals, with appliances being connected thereafter for shaping the semi-finished products and the molded articles. The extruder has a screw system consisting of two or more meshing screws. This design has an improved functionality and can produce components with reproducible quality.

Abstract: A charging device includes a feed pipe, constructed for connection to a plasticizing unit of an injection-moulding machine, and a compaction cylinder, which has a lower end supported by the feed pipe and an upper end received in a retaining flange to which a support plate is attached, whereby the upper end of the compaction cylinder, the retaining flange and the support plate extend in a same plane. Support pillars bear two parallel displacement rails fixed to the retaining flange. A support base is displaceable on these displacement rails between two positions and supports a compaction ram and a storage container. A hydraulic adjustment cylinder moves the compaction ram and the storage container alternately in alignment with the compaction cylinder. To gain access to the feed pipe for cleaning during material change, the compaction cylinder is coupled to the compaction ram to form a structural unit which can be raised upwards.