Plastic Rubber Rotor Free Vulcanizer Rheometer Machine

Introduction and Overview

The rotor-free vulcanizer is the most widely used instrument in the rubber processing industry to control the quality of rubber, rapid inspection and basic research of rubber. It provides accurate data for the optimized formula combination of rubber, and can accurately determine the parameters such as coke burning time, positive vulcanization time, vulcanization index and maximum and minimum torque.

The vulcanization meter consists of: host, computer, temperature measurement, temperature control, data acquisition and processing, sensor and electrical linkage, etc.The measurement and temperature control circuit is composed of measurement and control module, platinum resistor and heater, which can automatically track the change of power grid and environmental temperature, and automatically correct PID parameters, so as to achieve the purpose of fast and accurate temperature control.The data acquisition system and the electromechanical linkage can automatically detect the moment signal of rubber vulcanization process and automatically display the temperature value and set value in real time.After curing, automatic processing, automatic calculation, printing curing curve and process parameters.Display curing time and curing moment.The computer displays the vulcanization process in real time, from which the change of "temperature" and the change of "time-torque" can be clearly seen.

Machine features

This test instrument has the following characteristics:

A. High precision and wide range of temperature control.(plus or minus 0.1 ℃)

B. Clock programming function.(Setting and modifying time)

C. Technologically advanced switching power supply, wide range of voltage regulation.

D. Imported integrated circuits and control components.

E. English language.

F. Meet the requirements of GB/T16584 (rubber vulcanization characteristics tested with a rotor-free vulcanization meter) and ISO6502.

The powerful microprocessor USES high quality imported chips.For one thing, computers and microprocessors can take signals from torque sensors and record them on graphs.At the same time, the computer and the module interface for data exchange, and control the cavity temperature.

The rotor-free vulcanizer was designed with a series of interlocking features, including closing plastic glass doors.If the door is not closed, the mold cannot close.Only when the door is securely closed can the mold be closed.In order to work.

In a word, compared with other models, this type of vulcanizer is more stable in performance, more accurate, cheaper in quality and complete in function.It is the best instrument for testing rubber properties.

Structure and Principle

structure

Rotor-free vulcanizer is an intelligent instrument, which combines the mechanical and electrical principles.It consists of the following parts:

A. Mechanical part: consisting of housing, upper and lower mold, vibrator, force sensor and transmission;

B. Air compressor control system: air compressor is composed of three parts: air cylinder, solenoid valve and air compressor;

C. Electric control system: composed of temperature measurement and control system and door control device;

D. Test and control system: mainly consists of microprocessor, computer control system, data acquisition device, AC device, data processor, motor control, open and close mode control, report printer.The printer is an HP printer and the paper is A4 paper.

 Design principle

The mold cavity is composed of upper and lower molds. The rubber sample is placed in an almost airtight mold cavity and maintained at a certain temperature pressure. One of the mold cavities vibrates at a frequency of 1.7Hz, with an amplitude of ±0.5 or ±1.The vibration of the mold cavity causes the sample to produce shear strain, and at the same time, the sample generates a reaction force (torque) to the mold cavity in the opposite direction. The force value depends on the stiffness of the adhesive (shear modulus).

As vulcanization begins, the stiffness of the rubber sample increases, and the reaction force (moment) measured by the force measuring mechanism will gradually rise to the stable value or maximum value and be gradually displayed on the screen. At the same time, a corresponding curve curve of moment and time will be seen, which is usually called "vulcanization curve".The shape of the curve and the test temperature are related to the properties of the binder.After the test, the data and curves will be automatically stored in the database. If you need to print, just click "print".

The shape of the vulcanization curve depends on the temperature being tested and the properties of the rubber sample.In addition to the curves, the computer-controlled printer prints out the corresponding

Technical parameters

Data processing technical requirements

Draw the format, curve and parameters as shown in the figure below:

Data on the printed report represents the following:

M_L: Minimum torque

M_H: Maximum torque

T_S1 (early curing time and coke burning time) : ML± 0.1nm, that is, the time corresponding to the increase of 0.1n ·m torque on the basis of ML, calculated in minutes.

T_S2 (early curing time and coke burning time) : ML± 0.2nm, that is, the time corresponding to the increase of 0.2n ·m torque on the basis of ML, calculated in minutes.

T₁₀ (initial curing time) : ML+ (MH-ML) ×10% : the time corresponding to the torque reaching this value is calculated in minutes.

T₅₀(vulcanization time that can be accurately assessed) : ML+ (MH-ML) ×50% the time corresponding to the torque reaching this value, calculated in minutes.

T₉₀ (the best curing time often used) : ML+ (MH-ML) ×90% : the time corresponding to the torque reaching this value, calculated in minutes.

VC (vulcanization rate index) : VC=100/ (T90-TS1)

Test Curve:vulcanization curve,Torsion and time coordinate curves