Oscillation Frequency, Amplitude & Rotor Speed Check Service

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With the development of the rubber industry, it has been paid much concerns to the standardization of the test methods and its data quality.  As the main force in QC, the rotorless torsional rheometer and Mooney viscometer are widely used, not only large quantity with brands, but also different structures and technical basis, which may cause to test data differences.  By facing thousands of test data with differences every day, it is much difficult for QC to make quick pass/failure decision.  

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Oscillation Frequency, Amplitude & Rotor Speed Check Service
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  • Oscillation Frequency, Amplitude & Rotor Speed Check Service

Oscillation Frequency, Amplitude & Rotor Speed Check Service

With the development of the rubber industry, it has been paid much concerns to the standardization of the test methods and its data quality.  As the main force in QC, the rotorless torsional rheometer and Mooney viscometer are widely used, not only large quantity with brands, but also different structures and technical basis, which may cause to test data differences.  By facing thousands of test data with differences every day, it is much difficult for QC to make quick pass/failure decision.  

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    With the development of the rubber industry, it has been paid much concerns to the standardization of the test methods and its data quality.  As the main force in QC, the rotorless torsional rheometer and Mooney viscometer are widely used, not only large quantity with brands, but also different design, which may cause to test data differences.  By facing thousands of test data with differences every day, it is much difficult for QC to make quick pass/fail decision.  
    The differences of the test data are combined with the rubber material differences tested and the test instruments differences themselves. The former can be called “signals” that QC is really interest to review through tests and the later can be called “noises” coming from the instruments differences that really perplexing QC to make right decision.  Therefore, it is clear that the less deviations of the test instruments can rise higher insensitivity of the test data.         
    Any rheometer or Mooney viscometer has its nominal output, such as the oscillating degree and frequency of a rheometer or the rotor speed of a Mooney viscometer.  For example, a regular cure test by a rheometer is under the condition of its nominal oscillating degree ±0.5°, but it maybe actually output  ±0.45° due to mechanical wear, deformation, or accumulative error.  The different test results are given as follows:

     

    Test Condition: 
    Strain=±7% (±0.5°), Frequency=1.67Hz, Temperature=180℃,Time=5min

    Batch #

    ML(dNm)

    MH(dNm)

    Ts 1 (s)

    Ts2 (s)

    TC50 (s)

    TC90 (s)

    #A

    1.11

    10.91

    39.50

    48.20

    75.40

    150.50

     

    Test Condition: 
    Strain=±6.3% (±0.45°), Frequency=1.67Hz, Temperature=180℃,Time=5min

    Batch #

    ML(dNm)

    MH(dNm)

    Ts 1 (s)

    Ts2 (s)

    TC50 (s)

    TC90 (s)

    #A

    1.31

    10.01

    40.90

    50.90

    74.70

    147.30

     

    Same as above, a regular Mooney viscosity test by a Mooney viscometer is under the condition of its nominal rotor speed 2.0rpm, but it may probably output 1.8rpm due to rotor wear, deformation, or accumulative error.  The different test results are given as follows:

     

    Batch #

    Condition: ML1+4@2.0rpm, 100℃

    Condition: ML1+4@1.8rpm, 100℃

    Initial MU

    Final MU

    Initial MU

    Final MU

    #A

    75.95

    44.25

    71.69

      43.22

     

    It may be seen from the examples above that there most probably exist the differences between nominal output and actual output due to some reasons, which mixing with the differences of rubber materials bothers QC making correct decision.        
    The Degree-Frequency Verification Tester DFV2025 is specially designed to verify the oscillating degree and oscillating frequency of a Rotorless Torsional Rheometer and the rotor speed of a Mooney viscometer.  The specification is as follws:

     

    Oscillating Degree Range (°)

    0.01~90±0.01

    Rheometer test head

    By-conical, inactive

    Oscillation frequency range (Hz)

    0.1~30±0.01

    Rotor speed range (rpm)

    0.1~30±0.001

    Viscometer Test Head

    cylindrical, passive

    Programming Control, Digital Display, Win10 Operation System

     

    The operation of the Degree-Frequency Verification Tester DFV2025 has been verified and certified by CNAS, which is complied to the relevant stipulations of GB, ASTM etc., that is not complicated to operate but to mount the Test Head to the upper and the lower die separately and then the real output of the oscillating degree and its frequency of the rheometer or the rotor speed of the Mooney viscometer can be recorded and displayed on the screen.  The Tester is suitable for users to monitor the status of their rheometers and Mooney viscometers, for the manufacturers to control the rheomenter and the Mooney viscometer quality as well as for the metrological verification to verify the real output of rheometer and Mooney vicometer. 

     

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