As is known to all, the existence of defects such as microholes, impurity particles, semi-conductive interface bulges and trace water in the insulation of high-voltage cables is an important inducement for electrical aging and damage of insulation. Therefore, the impurity content index is a performance index that users and manufacturers attach great importance to
Using a single screw extruder with a flat die die, the material to be measured is made into a film. By passing the impurity measuring instrument, the high voltage cable insulation material quality detection can be quickly and accurately completed, which is the only effective method for impurity measurement at present.
Operating principle:
The tested polyolefin material is extruded by the flat die of the single screw extrusion system, and then made into thin strip samples with smooth, smooth and transparent surfaces (about 1mm in thickness and 30mm in width) by flow rolling or calendering. Driven by the constant tension coiling device, the samples pass through the electronic camera unit rapidly, uniformly and continuously
Under the irradiation of transmitted light, the camera unit obtains the signal of the defective particles in the material. After a series of circuit processing, the acquired signal is finally input to the computer. After calculation and processing, the computer gives the number, size, position and distribution of the impurity defective particles through the control interface of the system.
Technical characteristics:
The tested polyolefin material is extruded by the flat die of the single screw extrusion system, and then made into thin strip samples with smooth, smooth and transparent surfaces (about 1mm in thickness and 30mm in width) by flow rolling or calendering. Driven by the constant tension coiling device, the samples pass through the electronic camera unit rapidly, uniformly and continuously
Under the irradiation of transmitted light, the camera unit obtains the signal of the defective particles in the material. After a series of circuit processing, the acquired signal is finally input to the computer. After calculation and processing, the computer gives the number, size, position and distribution of the impurity defective particles through the control interface of the system
Casting type impurity detector is the film quality analysis system and the casting film unit together measuring equipment, it can measure the thickness of thinner film, has the advantages of high precision test speed test, and has a reliable tension adjustment mechanism, so that the test is more stable can be applied to the detection of high voltage cable insulation material
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