Abstract: A method for producing multilayer objects from a polymer melt, especially in an injection mold, especially preforms having a barrier layer, wherein a viscosity, especially a shear speed, of the melt is determined. The viscosity, especially the shear speed, of at least one layer is determined in the injection mold and optionally monitored and/or regulated.

Abstract: A method for controlling the filling of at least one cavity in a device for producing an object, in particular in an injection molding machine, wherein a melt is inserted into the cavity through an opening, and the width thereof is altered, wherein the width of the opening is also to be changed and adjusted, that is, fixed, in a position between a closed position and a maximal open position.

Abstract: A method for filling at least one cavity of a tool for producing a preform from a melted mass, specifically a cavity of a tool in an injection molding machine, the melted mass being introduced into the cavity under pressure from a plurality of nozzles. According to the method, a sensor is associated with at least one nozzle, the sensor determining the flow of melted mass in the cavity, and the filling process through the nozzles is automatically co-ordinated on the basis of the signals of the sensor.

Abstract: A method for producing multilayer objects from a polymer melt, especially in an injection mold, especially preforms having a barrier layer, wherein a viscosity, especially a shear speed, of the melt is determined. The viscosity, especially the shear speed, of at least one layer is determined in the injection mold and optionally monitored and/or regulated.

Abstract: A method for monitoring, documenting, and/or controlling an injection molding machine (P) having an injection molding tool (1) into which a melt is introduced, wherein a viscosity of the melt in the injection molding tool (1) is determined directly.

Abstract: A method for monitoring, documenting, and/or controlling an injection molding machine (P) having an injection molding tool (1) into which a melt is introduced, wherein a viscosity of the melt in the injection molding tool (1) is determined directly.

Abstract: A sensor comprising a base body and a sensor element, in particular for transforming and/or transferring measuring variables. The sensor element is associated with a receiving element.

Abstract: A method for filling at least one cavity of a tool for producing a preform from a melted mass, specifically a cavity of a tool in an injection moulding machine, the melted mass being introduced into the cavity under pressure from a plurality of nozzles. According to the method, a sensor is associated with at least one nozzle, the sensor determining the flow of melted mass in the cavity, and the filling process through the nozzles is automatically co-ordinated on the basis of the signals of the sensor.

Abstract: A device for forming objects in a cavity, the device being at least partially formed by an insert in a molding plate. A sensor is arranged in the insert towards the inner wall of the cavity embodied by the insert, the sensor being connected to a first coupling part with which a second coupling part is to be associated in the molding plate.

Abstract: A method for operating a tool shaft with the aid of a sensor element of a sensor, particularly an injection mold, in which at least one sensor, e.g. for determining an internal pressure of the mold, is assigned to the cavity. To this end, the sensor element is placed inside a sleeve with play and is subsequently calibrated, then, after determining the sensitivity, a correspondingly codeable component, e.g. a resistor, is selected, is fitted into the sensor, and the sensor, together with the sleeve, is placed inside a borehole of a mold wall.

Abstract: A sensor comprising a base body and a sensor element, in particular for transforming and/or transferring measuring variables. The sensor element is associated with a receiving element.

Abstract: A method for measuring physical variables using piezoelectric sensors, which generate an input voltage (Ie) for an amplifier is provided. The voltage is fed from the amplifier to a digital integrator.

Abstract: A device for forming objects in a cavity, the device being at least partially formed by an insert in a molding plate. A sensor is arranged in the insert towards the inner wall of the cavity embodied by the insert, the sensor being connected to a first coupling part with which a second coupling part is to be associated in the molding plate.

Abstract: A method for operating a tool shaft with the aid of a sensor element of a sensor, particularly an injection mold, in which at least one sensor, e.g. for determining an internal pressure of the mold, is assigned to the cavity. To this end, the sensor element is placed inside a sleeve with play and is subsequently calibrated, then, after determining the sensitivity, a correspondingly codeable component, e.g. a resistor, is selected, is fitted into the sensor, and the sensor, together with the sleeve, is placed inside a borehole of a mold wall.

Abstract: A method for controlling the production of injection molded parts in an injection molding die, which comprises a cavity and, optionally, a mold core of an injection molding machine, during which the temperature of the die is controlled. In addition, the cavity and/or the mold core are/is directly heated or cooled.

Abstract: A device for measuring, monitoring and/or controlling a temperature, in particular the temperature of the wall of an injection mold with the aid of a measuring element which passes a detector body through a corresponding orifice at least to the external walls thereof. The measuring element is blocked in the detector body and/or in a crimping bush which is disposed prior to said detector body.

Abstract: A production mold with piezo-transducers and associated signal processing amplifiers located inside it are housed in a tightly sealed, electrically shielded unit. The piezo-transducers are linked by a stranded conductor only insulated, which is cut to length in situ and led inside the shielded unit to a high-insulating terminal of the amplifier. There is no longer any need to use shielded cables between the piezo-transducer and amplifier.

Abstract: To obtain simultaneous filling of all cavities (K1-K4) in multicavity injection moulds, the mould cavity pressure (p) patterns in all cavities (K1-K4) are detected and the times (t1-t4) measured from the beginning of filling till a suitably chosen reference pressure (pR) is reached for each cavity (K1-K4). By interventions in the individual heating systems of the individual hot runners (5), the temperatures in these are altered to bring the measured times of the individual cavities more in line.

Abstract: For exactly determining the switchover point when producing plastic injection mouldings, two pressure sensors are arranged successively at intervals in the flow direction of the inflowing material, so that the material reaches them at different points in time, and pressure curves (p.sub.1, p.sub.2) are recorded inside the mould cavity. From the measured pressures, the differential pressure is derived. When passing from volumetric filing to compression, the pressures in the mould cavity (p.sub.1, p.sub.2) undergo an abrupt rise (U1, U2). This is reflected in a steep drop of the differential pressure formed, its gradient experiencing a change of sign (V). This indicates that the switchover point has been reached, at which the filling phase must give way to the holding pressure phase.

Abstract: When producing injection-moulded or die-cast articles the changeover point between a filling program and a subsequent hold pressure program is determined by measuring the pressure inside the mould cavity at regular intervals, and deriving two classification variables (k.sub.0.sup.+, k.sub.0.sup.-, k.sub.-1.sup.+, k.sub.-1.sup.-, k.sub.-2.sup.+, k.sub.-2.sup.-) from each of the last three measured values (p.sub.0, p.sub.-1, p.sub.-2) in classification stages (K.sub.0, K.sub.-1, K.sub.-2) and combining them into weighting variables (g.sup.-, g.sup.0, g.sup.+) in a logic stage (V) using the methods of fuzzy logic. In an evaluation stage (A), by means of evaluation functions a switching value (s) is derived from these and compared with a threshold value in a decision stage (E). If the switching value oversteps the threshold, it is deduced that the changeover point has been reached.