Application of VB Series VFD in Internal Mixer

1. Industry Overview

With the development and progress of society, "green, environmental protection and sustainable" has been continuously mentioned in industrial production in recent years. However, in the traditional rubber production process, there will be a lot of harmful gases, energy waste, low efficiency, and insufficient energy saving. It is also imminent to reduce emissions, and then transform from open mixer to internal mixer to frequency converter application. From the open mill to the internal mixer, the emission of harmful gases can be effectively reduced. From the internal mixer to the application of VB series VFDs, the entire system has improved production efficiency and effectively reduced energy waste, and has also greatly improved the automation of rubber production.

2 .Internal mixer working principle and control requirements

2.1  Working Principle

The working principle of the internal mixer is to add raw materials at a specific temperature (depending on the materials used, some need to be heated, and some need to be cooled), and through the rotation of the rotor, the materials are sheared by using different speeds and speed ratios. And pressure, so as to break the molecular chain of the material, to achieve the plasticizing temperature environment, to mix the raw materials, so as to achieve the purpose of mixing, so that various additives and masterbatch can be fully mixed, so that the components can be evenly distributed .

2.2  Control Requirements

(1) During production, it is necessary to adjust the speed according to the rubber mixing speed of different materials;

(2) The soft start function is required to achieve smooth start without large inertial impact, etc.;

(3) Control parking function, smooth parking function.

(4) When adding too much material, it can automatically reduce the speed without reporting a fault。

3. Electric Wirings & Photos from Site





4.Parameter Settings

ParameterDescriptionSet ValueRemarks
F0.01Start/Stop Order Source1DI Terminal
F0.03Frequency Source2AI1 Analog Input(0-10V)
F0.18Acceleration Time8080s
F0.19Deceleration Time8080s
F4.11Oscillation Suppression Gain10
F4.16AVR Function0AVR Off
F6.02Relay 1 Option41User-defined Output
F6.28User-defined Value 4Output Current
F6.29Comparison Option11Output when User defined value is equal or above F6.31
F6.31Comparison Value4500450A
FA.05Overcurrent Stall Suppression Gain50

5 .Features of Solution

(1) The VB VFD has excellent acceleration and deceleration performance. It starts completely steplessly and smoothly when starting, has no impact on the power grid, and fully protects the motor, equipment machinery and power grid impact.

(2) VB has automatic current limiting, automatic torque boost, and when the current is too high, it will automatically reduce the frequency to reduce faults.

(3) To meet the flexible production process, the speed of products corresponding to different production materials can be adjusted freely, which greatly improves the production efficiency and quality.

(4) VB VFD has a complete protection system, which can protect the entire system from overvoltage, overcurrent, overheat and short circuit to ground.

Engineering Video and Machine Pictures