Ⅰ 、Scope of application

Torque rheometer is an ideal equipment to study the flow and deformation, plasticization, thermal shear  stability, dynamic rheological properties  and plasticization behavior  of polymer materials  and show the results in the form of torque-time and torque-temperature ，and the mixing of multi-component materials, the cross-linking curing of thermosetting resins, the vulcanization of elastomers, the dynamic stability of materials and the influence of screw rotating speed on the processing performance of the system, etc. It can be widely used in scientific research and production, laboratory simulation in the mixing, extrusion process, a series of data to guide the reality of formula research and production, can be similar to the actual processing, continuous, accurate, reliable to determine the rheological properties of the material.

Ⅱ 、Product function

It has modular design  and ready-to-use  function: the host  is the  control center, which has the function of driving and controlling the measuring unit; the controlled auxiliary units (such as mixing units and extrusion units) are intelligent measuring units for specific applications, which can transmit the measurement data to the host through the bus system. It can be equipped with various auxiliary units to complete laboratory simulation experiments for different purposes.

Ⅲ 、Instruction of Building Block Parallel Twin Screw Extruder

Building Block Twin Screw：It is composed of screw elements with different numbers and functions, which are installed on a keyed or hexagonal mandrel according to certain requirements and sequence.  According  to  the  processed  materials  and  different  process  requirements,  different  quantities  and  different types of screw components and their best combinations can be selected for extrusion processing. In  this  way,  limited  screw  elements  can  be  used  to  meet  different  requirements  through  different  combinations,  thus  solving  the  contradiction  between  the  versatility  of  processing  needs  and  the  specificity of the machine.

（1） Screw combination

The  screw  of  twin-screw  extruder  generally  adopts  building  blocks  or  combined  types  in mechanical  structure.This makes the  screw  configuration, barrel  structure,  length-diameter ratio, the position and number of the feeding port and vacuum exhaust port of the twin-screw extruder need to be adjusted according to the changes in the material system and process requirements, in order to achieve the unity of universality and specificity.

Twin-screw extrusion process: feeding, solid conveying, melting, mixing, exhaust, conveying and other functional segments。

Different  functional  sections  require  different  local  screw  configurations  to  adapt  to  them  and achieve different functions. The design of screw combination configuration is an important and difficult issue, because it is related to many factors, such as the properties of the processed materials and the formulation  design,  the  operating  conditions  and  the  performance  of  the  screw  elements.  This combination is also a special technology and know-how. There is no formula to follow. Generally, it is necessary to understand the performance of various screw elements and material properties, and design through a combination of experience, theory and experiment.

（2）Screw elements

If the material conveying process in a twin-screw extruder is divided into solid conveying zone, melting zone and melt conveying zone like the conveying process in a  single-screw  extruder, then corresponding to the phase change of the material during the extrusion process, a whole screw can be decomposed  into  different  functional  segments,  and  different  functional  segments  use  the  same geometric structure to complete their functions. The screw segments that can achieve different functions are called screw elements. According to the different functions achieved, screw elements can be divided into conveying elements (composed of forward thread elements, with different numbers of screw heads and leads), pressure building elements (mainly reverse thread elements), shearing elements (kneading disks and their combinations), mixing elements (mainly toothed disk elements), etc.

Building block threaded element

Ⅳ 、Performance parameter

4.1 、Measurement and control host

Measurement and control software：

4.1.14、Data acquisition rate：50 times/s, recorded more subtle changes in torque, temperature and speed

4.1.15 、High  speed  acquisition, the temperature torque data curve can be amplified to observe the real-time transition change

4.1.16 、Polymer melt viscosity measurement data processing software

4.1.17 、Extruder data processing software

4.1.18 、Mixer data processing software

4.2 Building block parallel twin screw extruder

Screw module distribution diagram（1）

Screw barrel

Star-type transmission

4.3 Twin-screw touch computer

4.3 Mobile mixer（60mL/200mL）

Ⅴ 、Additional auxiliary equipment project（Optional）

1 、Screw metering feeding and side feeding device

Adjustable speed metering feeding device 

 Feeding screw

2 、Vacuum system（Optional）

3 、Molding traction cutting machine（Optional）

5 、Cooling water tank（Optional）

The cooling water tank can directly cool and shape the hose and sheet extruded from the extrusion torque rheometer with a strip die.

Cooling-water tank

 Tank interior

6 、Granulator（Optional）

The machine cuts plastic strips into a granular material for experimental research

Cutting machine

Cutting machine details

Ⅵ 、Main configuration

Ⅶ 、Structure principle and performance features

1）Structure and composition：A main measuring and controlling machine is independently connected with the mixer or single-screw extruder or twin-screw extruder under different requirements to form two modes of mixing rheometer and extrusion rheometer, which can be identified by the program.

1 、ZJL series torque rheometer, in addition to the main part of the host machine, extruder, mixer,

computer, can also be equipped with automatic weighing unit, measuring unit, three-roll calendering,    screw extruder, film blowing machine, strip sample calendering and traction unit, film quality test unit. More testing can be done with these units.

2 、Automatic weighting unit：It can automatically measure the relationship between the apparent viscosity of the material and the shear rate and shear stress.

2 、Diameter measuring unit：Complete the automatic measurement of die expansion.

3 、Strip sample calendering and traction unit: can produce uniform strip samples for tensile and thermal extension experiments.

4、Film quality test unit：It can complete the test of impurity particle defect and transparency of transparent materials.

The above optional units (conventional configuration does not include the above units) can be

combined with the measurement and control host and computer as the core and other components to form different experimental systems. These functions are in a leading position in China.

Host machine：It is mainly composed of body, drive motor and driver, reducer, torque sensor, temperature control system, measurement and control system, computer data processing system, etc

Japan Panasonic drive motor and driver

Domestic planet reducer

Temperature and control system: 

Temperature control module 

Temperature sensor

2）System software

The supporting software set consists of Mixer -- mixer test and control software, Plastic -- extruder test and control software, WinNian -- apparent viscosity test data processing software.Mixer and Plastic software interface has rich functions, which can complete the measurement, setting and control of speed, torque, temperature and pressure, and the curve window can display the curve of the above data and    the time in real time.

ZJL-200B torque rheometer is an automatic test instrument with computer as the core.Data acquisition, control and test data processing are all completed by the corresponding software, which not only makes the instrument easy to operate, precise control, but also makes test data processing and result output fast and efficient.More importantly, with the support of software, it can complete functions that traditional torque rheometers cannot complete, such as linear acceleration measurement of shear sensitivity of materials. Die correction during measurement of the relationship between apparent viscosity and shear rate of materials.

The design idea of ZJL-200B torque rheometer is to achieve function  expansion and performance improvement through software development without increasing the hardware equipment, so it has a high performance-to-price ratio.

Mixer and it’s application

The chamber of the ZJL-200B torque rheometer adopts a three-piece  structure, electric heating, 3:2 speed ratio, and the volume after adding the rotor is 60ml. It is made of stainless steel material and has good corrosion resistance ，The mixer can be used to perform many experiments, such as PVC material thermal fusion  test,  thermosetting  material  curing  cross-linking  performance  test,  thermal   stability  test,  shear sensitivity test, etc. Test curve superposition report.

Mixer test curve

Various functional rotors

Mixer test curve

PVC Thermostabilization

PVC Fusion

XLPE Cross-linking

 

Plastic extruder and apparent viscosity test

The screw length-diameter ratio of the plastic extruder is 40:1 ，the granular and powder screws with different compression ratios can be selected, and the capillary extrusion die, cylindrical extrusion die, tube extrusion die, wire coating die, etc. can be used to perform simulation experiments of different processes. The capillary extrusion die can be used to measure the relationship between the apparent viscosity of the material and the shear rate and shear stress.

Extruder test curve