HZJ-300D PVC Pipe Material Torque Rheometer

One,

Overview

1.1 Product Features

During the processing and shaping of rubber and plastic materials, their fluidity is almost always involved. For instance, in extrusion, injection molding, blowing film, and calendering processes, the flow behavior of the material is crucial. The fluidity of the material not only affects the processing behavior but also influences the mechanical properties of the final product. For example, molecular orientation significantly impacts the mechanical properties of molded products, films, and fibers. The type and extent of molecular orientation are primarily determined by the characteristics of the flow field during the processing and the flow behavior of the material.

The PVC pipe material torque rheometer is an ideal device for studying the flow and deformation, plasticization, thermal shear stability, dynamic rheological properties, and plasticizing behavior of PVC and polymer materials, presenting the results in graphical forms such as torque vs. time and torque vs. temperature. It is widely used in scientific research and production, serving as an essential instrument for conducting scientific studies and guiding production. Compared to general-purpose instruments like viscometers for measuring material fluidity, this rheometer offers a more dynamic measurement method that closely resembles actual processing. It allows for continuous, accurate, and reliable determination of material rheological properties under conditions similar to real processing, such as mixing of multi-component materials, cross-linking and curing of thermosetting resins, vulcanization of elastomers, material dynamic stability, and the influence of screw speed on system processing performance.

1.2 Scope of Application

The PVC pipe material torque rheometer is used to study the thermal stability, shear stability, flow, and plasticizing behavior of thermoplastic materials. Its most distinctive feature is the ability to continuously, accurately, and reliably measure the rheological properties of the system during processes similar to actual processing. It can also perform curing characteristic tests for thermosetting materials.

1.3 Application Fields

1. Research on UPVC Processing Properties and Material Development

2. Development and processing properties of thermoplastic materials

3. Crosslinking and Thermosetting Resin Curing Performance Research

4. Educational and Research Applications

II. Structural Features and Working Principle

1. System Composition

PVC Pipe Material Torque Rheometer

Composed of a high-shear torque rheometer, extrusion capillary rheometer, capillary test die, data acquisition and measurement system, electronic computer, and operating software, etc.

High-precision torque rheometer

The PVC pipe material torque rheometer mainly consists of imported servo motors, high-precision dynamic torque sensors, gearboxes, intensive mixing chambers, temperature modules, measurement modules, computers, and control software, as shown in Figure 2:

Figure 1: High Shear Torque Rheometer

The enclosed mixer is akin to a miniature extruder, consisting of a removable "∞"-shaped mixing chamber and a pair of rotors rotating in opposite directions at different speeds. Inside the mixing chamber, the rotors rotate in opposite directions, applying shearing force to the material, forcing it to be mixed within the chamber; the different speeds of the rotors result in a dispersed mixing in the gap between them.

The unit boasts overall aesthetics with a color scheme of cream white and blue for the main sheet metal. It can also be customized in colors as per the customer's request. The stainless steel parts are made of SUS304 stainless steel.

Computer software with data collection, storage, calculation, analysis, and output capabilities, capable of printing test reports according to user requirements.

Figure 2: Compacting Torque Rheometer   Figure 3: Various Rotors

Figure 4: Schematic illustration of a kneading torque rheometer

1 - Rod; 2 - Feed opening; 3 - Compounding chamber; 4 - Material leakage; 5 - Compounding machine; 6 - Emergency brake switch

7 - Manual Panel; 8 - Drive and Torque Sensor; 9 - Switches; 10 - Computer

Figure 5: Test Curve of the Intensive Shear Torque Rheometer

PVC Blending & Heat Stabilization

XLPE Crosslinking                               PVC Blending

Extrusion Capillary Rheometer

The capillary rheometer extruder is primarily composed of imported servo motors, reducers, extrusion screws, die, measurement and control modules, temperature modules, pressure sensors, electronic computers, and measurement and control software. Its principle involves rotating the screw to force the material through the die, during which the material's shear rate and shear pressure are measured, and the viscosity of the material at the specified temperature is calculated by the computer. Additionally, the capillary rheometer extruder can also serve as a production process testing instrument. By changing different types of dies, actual production processing can be performed with a small amount of material. During this process, the production process is verified through various means such as controlling the extrusion speed, melt temperature, and formulation ratios.

The core of the extrusion capillary rheometer is a set of exquisite capillaries with varying length-to-diameter ratios (usually L/D = 10/1, 20/1, 30/1, 40/1, etc.). By comparing tests through capillaries with different L/D ratios (while keeping other conditions constant, such as temperature), various pressure values are obtained, and the material's viscosity is calculated accordingly.

Capillary specification:

Table 1: Common Capillary Specifications

Figure 6 Capillary Die

This equipment is equipped with screws with different parameters, which rotate inside a cylinder at a certain temperature. A feeding hopper is located at the other end of the cylinder. As the material is fed to 2/3 of the cylinder, it is gradually plasticized. It then enters the remaining part of the cylinder where it is homogenized. Once all particles are fully melted, they can be extruded through a capillary die to form masterbatch or injected into molds for shaping. Simultaneously, the equipment measures the relationship between the material's apparent viscosity, shear rate, and shear stress.

Extruders can select different types of screws based on the material properties, and the compression ratio of the screws greatly affects the material's test performance. The screws can be easily interchanged to support rapid testing of various materials.

Figure 6 Various Types of Screws

III. Main Technical Characteristics and Configurations

Can be used to study the thermal stability, shear stability, flow, and plasticizing behavior of thermoplastic materials. Its most distinctive feature is the ability to continuously, accurately, and reliably measure the rheological properties of the system during processing similar to actual production. Additionally, it can complete curing characteristic tests for thermosetting materials.

Motor Power: Panasonic 3.0kw Servo Motor

2. Motor Speed: 3000 rpm

Motor Driver 3.0 kW

4. Gearbox: 1:20 Imported

5. Power Output Speed: 0 ~ 150 rpm

6. Speed Control Accuracy: 0.05% F.S.

7. Temperature Control: 5-point temperature sensing, with 4-point temperature control

8. Static Measurement Accuracy: 0.1°C

9. Temperature Control Accuracy: ±1°C

10. Torque Measurement Range: 0 ~ 250 Nm

Torque Measurement Accuracy: 0.1% F.S

Melt Pressure Measurement Range: 0.1 ~ 100 Mpa

13. Melt Pressure Measurement Accuracy: 0.5% F.S.

14. Software: Control and Measurement Software, Polymer Melt Viscosity Data Processing Software, Extruder Data Processing Software, Blender Data Processing Software.

15. Graphical Display: RPM, Torque, Temperature, Pressure

16. Voltage: AC 380V, 7.5 kW

The mixer platform is capable of conducting various tests, including thermal fusion of multi-component thermoplastic materials, curing performance of thermosetting materials, thermal stability testing, shear sensitivity testing, and material blending experiments.

Capacity: 60ml, 200ml (optional)

Material: 304L

Roller type

4. Rotor Treatment: Precision polished and surface chrome plated

5. Speed Ratio: 3:2

6. Maximum Torque: 250 Nm

Maximum temperature: 400°C

Temperature Sensor: Type K Thermocouple

9. Heating Method: Electric Heating

Heater: Heating Tube

11. Total Heating Power: 1700W

Heating Zone: 3 Routes

The twin-screw extrusion unit is mainly used for applications such as filling, blending, modification, reinforcement, chlorinated polypropylene, and desiccation treatment of high absorbent resin; extrusion of biodegradable masterbatch, polyamide condensation, and polyurethane polymerization reactions; granulation of carbon powder and magnetic powder; preparation of cable insulation materials, sheath materials, low smoke low halogen flame-retardant PVC cable materials, and various silane cross-linking materials.

Plastic Single Screw Extruder (Material: 38CrMOALA) [Optional, price to be negotiated]

1、L:D：     25：1

2. Screw Diameter: φ20mm

3. Screw Compression Ratio: 2.5:1

4. Maximum Temperature: 350°C

5. Heating Method: Electric Heating

6. Heating Zone: 5 Channels

7. Total Heating Power: 4200W

8. Temperature Sensor: K-Type Thermocouple

9. Machine Dimensions (Length x Width x Height): 1600 x 450 x 1300 (mm)

10. Capillary molds: φ1.27 with length-to-diameter ratios of 20:1, 30:1, and 40:1, each with one mandrel.

(φ1, φ2, and other optional specifications, prices to be negotiated separately)

Cylinder die head (optional): Inner diameter: φ5, Outer diameter: φ10

Parallel Co-rotating Twin Screw Extruder (optional, price to be negotiated)

1. Screw Type: Parallel Counter-rotating Twin Screw

2. Screw Diameter: 42 mm

3. Effective Screw Length: 276mm

4. Effective Cylinder Length: 276mm

5. Temperature Range: Room Temperature ~ 350℃

6. Temperature Control Accuracy: ±0.5% F.S.

7. Temperature Sensor: Type K Thermocouple

8. Total Heating Power: 2500W

9. Molding Mouth Specifications: 60×1.5mm

Main Configuration