摘要:
In a method for synchronizing drive units, a target value of the speed of each drive unit of a plurality of drive units speed is computed by determining the product of a maximum speed of the drive unit, a unit-dependent normalized ratio value of the drive unit, and a synchronization factor which is identical for all drive units. The ratio value defines the relative speeds of the individual drive units. Changing the synchronization factor causes synchronous speed changes of the drive units. As a result, a lasting synchronization can be realized across the entire speed spectrum.
摘要:
Apparatus for producing injection-molded parts, particularly PET preforms, includes a twin-screw extruder or multi-screw extruder for preparing and/or plasticizing material, preferably in granular form, which is transferred to a transfer reservoir. A piston unit further processes the material. The extruder has a plurality of processing zones, whereby at least two process zones are configured as degassing zones.
摘要:
A control device for use with a plastics processing machine, e.g. an injection molding machine, includes a housing which is constructed for protection against ingress of water in compliance with the IP code and accommodates a heat source such as a CPU unit or a display unit. A cooling system is provided for dissipating heat generated by the heat source and includes a pump for pumping a coolant, at least one cooling element arranged inside the housing, a cooler provided outside the housing, and a coolant circuit for circulation of the coolant. The coolant circuit fluidly connects hereby the pump, the cooling element and the cooler with one another.
摘要:
A clamping unit for an injection molding machine includes a fixed platen, a support platen, and a moving platen which is arranged between the fixed platen and the support platen for back and forth movement. An opening and closing mechanism constructed as crank drive having at least one crank disk is provided to effect a back and forth movement of the moving platen in relation to the support platen, with the crank disk rotatable by a drive mechanism. A first connecting rod links the crank disk to the support platen, and a second connecting rod links the crank disk to the moving platen, wherein at least one of the first and second connecting rods is articulated in eccentric relationship to the crank disk. A pulling means extends between the support platen and the fixed platen to allow a buildup of a clamping force between the fixed platen and the moving platen.
摘要:
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.
摘要:
An injection unit for an injection molding machine includes a plasticizing unit in the form of an extruder, a plunger-type injection device, which can be connected to the injection molding machine by an injection nozzle. The plunger-type injection device defines an injection space. The extruder has a forward portion which is connected to the injection space by a melt through channel in which a shutoff valve is disposed. The extruder is operated continuously and includes one or more plasticizing screws, wherein the extruder is configured in such a way that the backup length can expand backwards into the extruder, when the shutoff valve is closed.
摘要:
A device for removing an injection-molded substrate with attached sprue from an injection mold having half-molds, in particular a substrate for optical data carriers, includes a lever that can swing in and out of a position between the half-molds of the injection mold and is constructed to include a substrate retaining mechanism with a substrate retaining member with a recess or an opening sized to hold the substrate and configured to receive the sprue with a pass fit. The substrate retaining member secures the substrate in place as the lever swings in and out of the open half-molds. An injection molding machine using the device is also described. The substrate can be quickly demolded and the sprue removed in a single operation without producing dust in the mold.
摘要:
A mixing head includes an integrated shot counting apparatus. The shot counting apparatus is hereby implemented as an integrated circuit with a detector for ascertaining an operating parameter of the mixing head, and an electric acquisition and storage unit operatively connected to the detector and having a counter and a non-volatile memory device which is operatively connected to the counter.
摘要:
A hydraulic mold clamping unit, in particular for an injection molding machines or a press, includes a fixed lower platen and an upper plated which is moved by an open-close mechanism in a vertical direction. The open-close mechanism includes at least one hydraulic cylinder of a first type having a double-acting piston, and at least one hydraulic cylinder of a second type. A hydraulic pump system is operatively connected to both sides of the hydraulic cylinder of first type, and a pressure accumulator is operatively connected to the hydraulic cylinder of second type. in order to realize an energy-efficient operation of the upper platen at little pressure build-up, a proportional or regulation valve is disposed in the pump system for modifying a back pressure in the hydraulic cylinder of first type, when closing the lower and upper platens.
摘要:
A horizontal injection molding machine includes a machine bed defining a longitudinal axis and two mold platens supported on the machine bed for movement in a direction of the longitudinal axis, whereby each of the mold platens carries a half-mold. Further provided is a turning device which carries at least two half-molds for interaction with the half-molds on the mold platens, and includes a base plate, which is fixedly mounted to the machine bed between the mold platens, a turntable, and a bearing unit supporting the turntable on the base plate on one side for rotation about a vertical axis. The half-molds of the turning device are hereby attachable on a base-plate distal side of the turntable. The mold platens are moved by a drive mechanism in relation to the turning device, and tie bars extend between the mold platens and are constructed to resist a clamping force.