| 摘要 |
The invention relates to a device to be used in a laboratory for measuring t he viscosity of plastic materials, especially of molten polymers, according to the principle of determining the drop in pressure when the material is flowi ng through a capillary having a defined cross-section and a defined length. A device of this type can particularly be used for carrying out continuous measurements during operation, especially in integrated quality control. To this end, a volumetrically controllable molten material pump (13) which is provided for producing a defined flow of molten material is incorporated in a device that can be heated. In order to measure a large range of flow rates, n capillaries (37-39) of different dimensions are incorporated in the device i n a fixed manner, whereby n = 2, 3, 4,... The flow of molten material from the pump (13) to each capillary is carried out by a mobile molten material distributor (30) so that two or more capillaries can be charged in successio n with molten material by varying the position of the distributor (30), and a pressure measuring sensor (18) and temperature measuring sensor (19) which a re matched to the pressure range are connected upstream from each capillary.</S DOAB>
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