Auto DRKMFR100+ Moving Die Rheometer

Product details

1. AUTO DRKMFR100+ Moving Die Rheometer

Rotorless Rheometer has now wide application to quality control and R&D for rubber compounds. Rotorless Rheometer AUTO DRKMFR100+ is newly developed based on ASTM D5289. It is most suitable to strict requirements in workshop place, reliability as well as maintenance. The test process of the sample is highly automated. The operator only needs to put the sample on the guide frame, and the test can be completed automatically according to the preset test method, which can satisfy the user's requirement of improving the detection efficiency, reducing the manpower cost and labor intensity and avoiding human error. As an expansive testing platform, when optionally equip-ped with a pressure kit, AUTO DRKMFR100+ can be expanded its testing capability for sponge rubber materials.

Main Features:

l Standard Cure Test complied with ASTM D5289

A rubber specimen to be tested is contained in a die cavity which may be closed or almost closed and maintained at an elevated temperature. The cavity is formed by two dies, one of which is oscillated through a small linear or rotary amplitude. This action produces a sinusoidal alternating linear or torsional strain in the test specimen and a sinusoidal shear force or torque which depends on the stiffness (shear modulus) of the rubber compound. The envelope curve, which is defined as the amplitude of the oscillating force or torque, is continuously recorded as a function of time. The stiffness of the rubber test specimen increases as vulcanization proceeds. The test is completed when the recorded force or torque rises to either an equilibrium or maximum value, or when a predetermined time has elapsed. The time required to obtain a vulcanization curve is a function of the test temperature and the characteristics of the rubber compound.

Frequency Sweep (0.1Hz to 20Hz) complied with ASTM D6204 Part A（Optional）

A rubber test specimen is contained in a die cavity that is closed and maintained at an elevated temperature. The cavity is formed by two dies, one of which is oscillated through a rotary amplitude. This action produces a sinusoidal torsional strain in the test specimen, resulting in a sinusoidal torque, which measures a visco-elastic quality of the test specimen. The test specimen can be either a raw natural or synthetic rubber or an uncured rubber compound.

These visco-elastic measurements can be made based on (1) a frequency sweep, in which the frequency is programmed to change in steps under constant strain amplitude and temperature conditions. …

For a frequency sweep test, the instrument is typically programmed to increase the frequency with each subsequent step change. …

Rheological properties are measured for each set of frequency, strain and temperature conditions. These properties can be measured as combinations of Elastic Torque S’, Viscous Torque S", Storage Shear Modulus G’, Loss Shear Modulus G", TanDelta, Complex Dynamic Viscosity ŋ*, and Real Dynamic Viscosity ŋ’.

In SBR test, the Complex Torque S* can be measured by AUTO MFR100+ at 100 ℃ (temperature), ±0.5° (7% shear strain) and 0.1Hz (frequency) to correlate with its Mooney Viscosity Test ML(1+4) at 100℃ up to over 0.95, which makes it possible to replace traditional Mooney Viscosity Test in QC.

Frequency Sweep Test by AUTO MFR100+ can economically carry out “The Three-Point Frequency Sweep at 0.1Hz, 2.0Hz, 20.0 Hz and 7 % strain" stipulated in ASTM D6204 Part A for batch release control.

Non-isothermal Cure Test（Optional）

AUTO DRKMFR100+ can simulate the thermal history of rubber parts in real cure conditions, from which the test result is much closer to the actual production conditions, especially for the thick parts. Meanwhile, the Scorch sensitivity under Non-isothermal test is times higher than isothermal test.

Customized Cure Test（Optional）

Customer can set specific testing conditions in the range of the frequency and strain as well as temperature of AUTO MFR100+, whichever the test means something.

l More Data Points

In addition to those data points which can be calculated in existing rheometer, such as Complex Torque S*, Elastic Torque S’, Viscous Torque S", Loss TanDelta and specific several Scorch points and Cure points, MFR 100A can calculate more data points including Complex Shear Modulus G*, Elastic Shear Modulus G’, Viscous Shear Modulus G", Dynamic Viscosity ŋ, any Scorch Time tsx and any Percentage of Cure Time TCx, etc.

l Sealed Die Cavity Design, Supreme Repeatability (RPT) and Reproducibility (RPD) Repeatability and reproducibility of testing results is very important for quality control, which depends on the design and manufacturing quality of the instrument itself. Manufacturing process and quality of the instrument is well and strictly controlled in all parts selection, processing control and assembly quality through careful product design, technology, technique, materials and processing to ensure each unit keeping coherent and steady. Meanwhile, sealed die cavity design of the instrument also ensures its super repeatability and Reproducibility:

l Excellent Temperature Control

The measuring precision and responding efficiency is greatly improved by using high quality 4-wire PRT temperature probe. Fuzzy Logic and PID technology used results to further quick temperature recovery and small overshoot and shift during tests.

l Network Interface

The instrument is equipped with an RJ45 Ethernet Connection Port that supports TCP/IP protocol. Data transmission and management can be easily done through network. As an option, when equipped with NIDAS software network version made by NORKA, all kinds of NORKA instruments can be networked together for centralized management for both instrument and data processing. In addition, testing data can be easily exported into the user’s ERP system. And also, USB ports and RS232 Serial Port are available for multiple purpose of connection or output.

l Pressure Kit for Sponge Rubber（Optional）

When optionally equipped with Pressure Kit for testing sponge compounds, it is possible to measure cure properties with pressure change and both cure curve and pressure curve can be displayed in real time for further reviewing both curing and foaming process with its excellent sensitivity in testing fine pressure change, which will support users to control the compound in its initial foaming, initial curing as well as second foaming.

l Easy Maintenance

The instrument is designed for maintenance free. With the special designed tools, seal ring and/or re-calibration can be quickly and easily replaced.

l Safety Assurance

The instrument is specially designed with safety shield and some other safety measures to protect operator from any possible hazard and injury.

2. Specification