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Principle Of Operation And Characteristics Of The Viscometer
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Posted On :
Nov-18-2011
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Article Word Count :
501
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Accuracy dissolve (measuring) the pump to move a small part of the fluidity index (up to 3 kg / h) in the precision of the place bypassvia capillary.
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Accuracy dissolve (measuring) the pump to move a small part of the fluidity index (up to 3 kg / h) in the precision of the place bypassvia capillary. Elastic properties of time that may interfere with the measurements are filtered with the optimal length of the intake and exhaust sections of the capillary into the slot, align the laminar flow.
Since the flow through the capillary, the exact size of the capillary tube and differential pressure in the capillary can be calculated
shear and dynamic viscosity
Design parameters:
Height H of the capillary
The length of the capillary
Capillary width B
V0flow rate (volume) of the gear pump
Processing parameters:
N the speed of the gear pump
Volume flow rate Q (n) in the capillary
Dimensions:
P1, P2 melt pressure in the capillary
Melting temperature T
The on-line viscometer measures the shear stress and viscosity accordingly. By varying the speed (rpm) in the gear pump, it is possible to define different shear stresses and to measure the corresponding scosities VI. With these data and with some corrections
factors (eg Weissenberg / Rabinowitsch, Schumer, Dodge / or Metzner Reiner / Philipoff) a viscosity curve in a range of shear stresses can be measured and translated into concrete results.
The design mandates that the unit was to provide a device that is compact and therefore easy to retrofit without interrupting the process (non-MEA
measurable increase in residence time) easy to use, able to withstand the harsh conditions of production and provides reliable results (accurate after calibration) accuracy comparable to laboratory results.
Generally, the viscometer Online is set in the middle, like a screen changer and melt pump extrusion line. The diameter of the fusion channel can be adapted to customer's existing equipment (20 to 110 mm in diameter, as illustrated
2), and within certain limits, holes, connections can be varied so that the installation more compact. The equipment includes melt (measured) + pump motor, gearbox and the pressure necessary to melt and temperature sensors as well as display and control of hardware and software.
Features:
The unit is heated electrically or by means of a liquid / vapor heat transfer. The user interface is to use a touch screen that shows all the operating conditions and allows the operator to adjust the settings via a clear and accommodation
cal menu structure.
With depth corresponding capillary slot (capillary can be exchanged during production, the viscosities within 1 Pa.s to 20,000 Pa.s. be measured. The measurement range is also easy to adjust.
Great care in designing the unit to avoid dead spots or edges where the polymer shear and temperature sensitive could be hung or the flow may stagnate, dissolve the channels are made of high quality to ensure the smooth flow. That
innovative feature is the capillary hinge design that is easily removable and easy to clean (and off).
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Article Source :
http://www.articleseen.com/Article_Principle Of Operation And Characteristics Of The Viscometer_106236.aspx
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Author Resource :
Visit viscometer.co for all types of viscometer according to your need.
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Keywords :
viscometer, digital viscometer,
Category :
Product Reviews
:
Digital Products
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