CEAST rheologic 5000

Scope

With a maximum force of 50 kN, a speed range of 1 : 100.000, and a maximum speed of 1.000 mm/min, RHEOLOGIC 5000-Twin is the top of the Ceast rheometers line.

This instrument satisfies the practical demands of the market, which requires a twin bore capillary rheometer for easy and automatic Bagley correction, comparative tests and high productivity

Basic features:

?high quality mechanics to guarantee long term precision of working parameters such as speed and pressure

?tried and tested design of components that regulate and maintain temperature stability

?flexibility in use and application

?an advanced software for the control of the instrument, the management of the test and the analysis of the results.

As its name suggests, the RHEOLOGIC 5000-Twin employs the latest rheological solutions of top rheologists, which makes it an ideal tool for obtaining data and therefore for optimizing the transformation processes of plastic materials.

Quality control, product uniformity, and CAD/CAM design data are some of the tasks for which the RHEOLOGIC 5000-Twin is designed.Control and flexibility

?Control and management via separate PC offers a far greater range of programming than stand alone systems, both for standard procedures and for specialized experimentation

?The flexible software VisualRHEO allows to take advantage of the double barrel for different uses:?Automatic Bagley correction

?Comparative tests on different samples ?Multiple tests on same sample

?Tests can be run at constant speed or constant shear rate.

?An unlimited number of increasing speeds or shear rates can be programmed in each test, allowing a large variety of processing conditions to be examined in a short time.

?Quickly removable pistons to facilitate cleaning.

?Easily changeable nozzles with several L/D ratios facilitate the use of the usual rheological corrections (Bagley, Rabinowitsch).

?Force and pressure sensors can be interchanged to study specific work situations.

?Lower operation costs due to unattended operation during automatic tests.

Options

?Possibility to insulate material with nitrogen blanket.

?Slit dies with multiple sensors; possibility to measure the First Stress Normal Difference.

?PVT system for the measurement of pressure-volume-temperature diagrams of polymers.

Standards

Designed and built to meet the following standards:?ISO 11443?ASTM D 3835?DIN 54811

and other equivalent.

Front view

Rheologic 5000-Twin equipped with Stretching Unit

Standard Features

?Electrowelded compact frame

?Electronics based on up-to-date microprocessor and components in order to control piston motion and temperature

?Heating of the double barrel by independent heating elements, suitable for high temperatures

?Two force transducers (interchangeable load cells) max 40.000 N each one, positioned directly on the piston

?VisualRHEO 0710.414 software in Windows 95/98/NT environment to manage the Rheologic and to process the data

- Real-time graphic display of the measured quantity

(pressure or speed)

- Test results in numerical and graphic form (curves of shear rate, shear stress, viscosity in any rheological combination, both with apparent and real values)

- Bagley and Rabinowitsch correction

ESP feature

Basic VisualRHEO software includes E quilibrium S tress P rediction developed by Ceast. ESP features a completely new algorythm able to predict the achievement of the steady state pressure (or speed).

VisualRHEO Software - code 0710.414

VisualRHEO has been developed based on CeastVIEW platform.

The extraordinary information organization, upon which the software VisualRHEO is based, makes the management of the test very simple and functional.

This software accessibility, together with the password management on three levels according to Module Operator and with the

availability to run the program in demo version, make the whole system perfectly suitable to the most advanced organization of laboratories.

The VisualRHEO software allows the operator to run the RHEOLOGIC 5000-Twin in fully automatic mode (according to ESP), or to “pilot”the system in semi-automatic mode with real-time manual intervention if and when necessary.

The patented automatic procedure based on the algorithm ESP (Equilibrium Stress Prediction) makes it possible to perform tests in fully automatic mode in order to reduce the test time, to save material and to free the operator from the obligation of standing in front of the instrument during the test.

By reducing test time so significantly, a number of positive advantages can be realised:

?uniform and objective determination of equilibrium stress state;?more time for analysis at low speeds which are best related to polymer structure;

?higher number of speed steps in the same material filling;?enhanced observation possibilities of materials which are unstable or have rapid degradation times;

?Minimized time to get results: this leads to the possible use of RHEOLOGIC 5000-Twin as an on-line/at-line rheometer.

Shear Stress and Viscosity

vs. Shear Rate

Pistons inside the double barrel

Configuration of Rheologic 5000-Twin in CeastVIEW platform

A P 7030- 02 0702- v a l f r é - p r i n t e d i n i t a l y

Technical Data

? Overall dimensions (LxDxH) [mm 3]860 x 700 x 2340? Weight [kg]500

? Supply 230 V - 50 Hz - Singlephase (110 V - 60 Hz on request)? Power [W]5000

? Paint

fuchsia RAL 4006 - gray RAL 7035

Main Ancillary Equipment

?Sets of two piston and one double barrel having different diameter:code 7030.001 - diameter 9.55 mm, lenght 290 mm code 7030.002 - diameter 12 mm, lenght 290 mm code 7030.003 - diameter 15 mm, lenght 290 mm code 7030.004 - diameter 20 mm, lenght 290 mm

?A wide set of interchangeable dies, designed according to the standards, both flat head and conical head, suitable to the different barrels. Diameters from 0.25 to 2 mm, lenght from 0.5 to 40 mm. L/D ratio up to 160. Special design on request.

?A wide choiche of pressure transducers

?Stretching Unit code 6948.085 equipped with:- DC servomotor , rotation speed 2 to 2000 rpm

- Drawing pulley diameter 60 mm (interchangeable with other pulley for other speed ranges)- Drawing force detector range 0-50 g resolution 0.01 g - Device for suction of the extruded filament - Software for:

- stretching test (detection of stretching force and ratio at breaking point)

- melt stretching test (gives statistic results obtained from multiple stretching tests)

- extrusion test (to determine the extrusion factor from stretching trend immediately after barrel filling)?Die Swell tester system code 6948.040 complete with:- Laser detection system

- Software for real-time detection of extruded diameter and real-time display on the PC’s screen of the die swell ratio Technical Characteristics ?Force range

50 kN

?Interchangeable force transducers from 5 to 40 kN

?Force transducers accuracy

±0.20% full scale (combined error)?Interchangeable pressure transducers from 3.5 to 200 MPa

?Pressure transducers accuracy better than 0.25% full scale

?Temperature range

from 50 to 450°C without pressure transducer from 50 to 400°C with pressure transducer ?Temperature resolution

±0.1 °C ?Barrel temperature stability in test area ±0.2°C

?Piston speed selectable between 0.01 and 1000 mm/min (ratio 1 : 100.000)?Piston drive brushless servomotor

?Heating system

two independent PID thermoregulators

"Due to the continuous development policy of CEAST's Research and Development Department, changes may be introduced without notice"

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