Rubber No Rotor Rheometer Vulcanized Rubber Rotorless Rheometer Moving Die

Rubber No Rotor Rheometer  Vulcanized Rubber Rotorless Rheometer moving die rheometer

Rotorless vulcanizer is an instrument widely used in rubber processing industry for controlling the quality of rubber materials, rapid inspection and basic research of rubber. It provides accurate data for the optimal combination of rubber formula, and can accurately measure parameters such as coking time, positive vulcanization time, vulcanization index and large and small torque.

The vulcanizing instrument includes: main engine, computer, temperature measurement, temperature control, data acquisition and processing, sensor and electrical interlock, etc.Among them, the circuit of temperature measurement and control is composed of measurement and control module, platinum resistance and heater, which can automatically track the change of power grid and environment temperature and automatically correct PID parameters to achieve the purpose of rapid and accurate temperature control.Data acquisition system and electromechanical interlock complete the automatic detection of moment signal of rubber vulcanization process, automatic real-time display of temperature value and set value.After vulcanization, automatic processing, automatic calculation, printing vulcanization curve and process parameters.Display curing time and curing moment.The computer displays the vulcanization process in real time, and the change of "temperature" and "time-torque" can be clearly seen from the above.

Rubber No Rotor Rheometer  Vulcanized Rubber Rotorless Rheometer moving die rheometer

Machine features

This test instrument has the following characteristics:

1. High precision and wide range of temperature control.(±0.1 ℃)

2. Clock programming function.(setting and modifying time)

3. Switch power supply with advanced technology and wide voltage stabilizing range.

4. Import integrated circuit and control components.

5. All Chinese characters.

6. It meets the requirements of GB/ t16584-1996 (vulcanization characteristics of rubber are tested by rotor-less vulcanizer) and ISO6502.

Powerful microprocessors use imported chips of high quality.On the one hand, computers and microprocessors can take signals from torque sensors and record them on graphs.At the same time, the computer and the measurement and control module interface for data exchange, and control the temperature of the cavity.

The rotorless vulcanizer is designed with a range of interlocking functions, including closing plastic glass doors.If the door is not closed, the mold will not close.Only when the door is securely closed can the mold be closed.Before work can begin.

All in all, compared with other models, this type of vulcanizer has more stable performance, more accurate, cheaper and better quality, and complete functions.It is an instrument for testing the properties of rubber.

Rubber No Rotor Rheometer  Vulcanized Rubber Rotorless Rheometer moving die rheometer

Technical specifications and specifications

Rubber No Rotor Rheometer  Vulcanized Rubber Rotorless Rheometer moving die rheometer

Structure and principle

structure

Rotorless vulcanizer is a kind of intelligent instrument which combines mechanical and electrical principles.It consists of the following parts:

A. Mechanical part: it is composed of shell, upper and lower mold, vibrator, force sensor and transmission;

B. Air compressor control system: it is composed of open and close mold cylinder, solenoid valve and air compressor;

C. Electronic control system: it is composed of temperature measurement and control system and door control device;

D. Test and control system: it is mainly composed of microprocessor, computer control system, data acquisition device, ac device, data processor, motor control, mold opening and closing control, and report printer.The printer is an HP printer and the paper is A4.

Design principle

The mold cavity is composed of upper and lower molds. The rubber sample is placed in the nearly closed mold cavity and maintains a certain temperature and pressure. One of the mold cavities vibrates at a frequency of 1.7hz with an amplitude of 0.5o or 1o.The vibration of the mold cavity causes the sample to generate shear strain, and at the same time, the sample generates a counterforce (torque) in the opposite direction to the mold cavity. The force value depends on the stiffness of the adhesive (shear modulus).

With the beginning of vulcanization, the stiffness of the rubber sample increases, and the reaction force (torque) measured by the force measuring mechanism will gradually rise to a stable value or a large value and will be displayed on the screen gradually. At the same time, a curve of the corresponding relationship between torque and time can be seen, which is usually called "vulcanization curve".The shape of the curve and the test temperature are related to the properties of the adhesive.After the test, 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 test temperature and the properties of the rubber specimen.In addition to the curve, the computer-controlled printer prints out the corresponding technical parameters.

The data on the printed report represents the following:

ML: small torque

MH: high torque

TS1 (early vulcanization time and coking time) : ML ±0.1nm is the time corresponding to the increase of 0.1n ·m torque on the basis of ML, which is calculated in minutes.

TS2 (early curing time and coking time) : ML± 0.2nm is the corresponding time when 0.2n ·m torque is added on the basis of ML, which is calculated in minutes.

T10 (initial vulcanization time) : ML+ (mh-ml) ×10%, the corresponding time when the torque reaches this value, which is calculated in minutes.

T50 (vulcanization time that can be accurately evaluated) : ML+ (mh-ml)× 50% the corresponding time when the torque reaches this value, which is calculated in minutes.

T90 (usually good curing time) : ML+ (mh-ml)× 90% of the time when the torque reaches this value, which is calculated in minutes.

VC (vulcanization rate index) : VC=100/ (t90-ts1)