摘要:
An apparatus for the measurement of the temperature of a plastified plastic material at the exit of an extruder, characterised in that the function of the sound, velocity in dependence of the temperature is measured and memorised for at least one plastified plastic material, the sound velocity is measured during the extrusion of the plastic material, and the respective temperature is determined from the velocity measurement values and the function.
摘要:
A method for non-contact measurement of the velocity and/or the length of an extrudate moved forward in the longitudinal direction, in particular of a cable during the production.
摘要:
A method for visualising the eccentricity of cables which is acquired in the eccentricity measurement of the cables, wherein eccentricity measurements take place at the same time on plural locations spaced apart across the perimeter of the cable during the transportation of the cable, and the measurement values are represented graphically on a display after being processed in a computer, characterised in that a frequency distribution of individual eccentricity values acquired during the measurement interval is represented on the display, wherein the scattering caused by measuring instruments is significantly smaller than the scattering of the individual eccentricity values.
摘要:
The device for measuring the capacitance of electrical wires has a first and a second measuring tube both connected to a voltage source of high frequency. The first measuring tube has a conventional length while the second measuring tube is significantly shorter. With the first measuring tube the capacitance of the wire can be measured in a conventional manner. The second measuring tube allows the measurement of local changes of the capacitance.
摘要:
A device for measuring the position of a conductor in an enveloped cable, preferably directly after extruding the plastic envelope, in which at least a supporting means for a sensor is continuously engaging the periphery of the envelope and in which the sensor determines the distance between the conductor and the sensor, and wherein the output signal of the sensor is delivered to a processing and displaying means, wherein the supporting means is defined by a roller driven by the cable which roller is yieldingly supported normal to the rotational axis.
摘要:
The disclosure relates to a method for measuring the temperature of a strand-like material to be heated to a target temperature, including the steps: the strand-like material is guided in heat conducting contact about at least one disk, mounted so as to rotate, that is heated to a predefined temperature, and a difference is measured between the temperature of the strand-like material or a value characterizing the temperature of the strand-like material, before conveyance about the disk and after conveyance about the disk. The disclosure also relates to a corresponding device.
摘要:
A window arrangement on a pressure pipe, with a casing in the train or at the end of the pressure pipe, said casing featuring flanges on diametrically opposing sides having radially directed passages, whose axes are standing perpendicular to the longitudinal axis of the pressure pipe and are located in a measurement plane for an x-ray measurement device, an x-ray source being associated to the one passage on the outer side and a receiver sensitive to X-rays to the other passage, and with window plates that are transmissive for X-rays which are sealingly arranged in the associated passage and are fixed in the passage with the aid of a fastening member and which consist of a material which is resistant against high temperatures and process-due etchings by chemically aggressive substances.
摘要:
A system for controlling the outer diameter of a strand, particularly of a cable or the like including a measuring device for measuring the outer diameter of the strand of plastic material emerging from the extruder. The signal of the measuring device is fed to a comparator which compares it with a reference diameter and generates a difference signal. A control unit receives the difference signal to control the rotational speed of the extruder and/or the speed by which the strand emerges from the extruder. A computing stage is connected to the control unit which generates a comparison signal modulated by the actual diameter signal and fed to the control unit.
摘要:
A device for vulcanizing or cross-linking a cord particularly a cable provided with a plastic covering, the device comprising an elongated pipe housing at the upper end of the housing, the cord being inserted and the upper area thereof being defined as a heating area and the lower area thereof as a cooling area wherien at least the heating area is provided with an inlet and an outlet for a protective gas, and an inspection window fitting positioned laterally at the pipe housing adjacent to the upper end for inspecting or measuring, respectively, the diameter of the cord by means of a suitable optical-electrical measuring device through an inspection window, wherein a separate heating device is associated with the upper area of the heating area of the pipe housing associated with the inspection window fitting, the heating device heating the atmosphere in the upper area permanently to a temperature higher than in the remaining areas of the heating area.
摘要:
Method for the simulation of defects in the case of spark testers, in which breakdowns are recognized and displayed by a detector and added by means of a defect counter, wherein the high voltage is applied to a stationary standard spark gap and pulsed test voltages of predetermined level, duration and frequency are generated by the high voltage generator of the spark tester in short regular intervals.