This machine uses a compressor for mechanical refrigeration to provide a constant low-temperature environment, and can heat up according to a set heating rate. The cooling medium is alcohol (provided by the customer), and the temperature value at which rubber and other materials gradually deform and reach the specified value after being frozen at low temperature for a period of time is measured by the dedicated stretching fixture and displacement sensor of the machine. This machine adopts computer system integrated control, software one click testing, automatic calculation and other related parameters.

GB/T7758, ISO 2921, etc

Adopting computer system integration control and PLC programmable controller integration control, with simple operation, integrated control, automatic timing, and real-time temperature display. Program automatic control.
Adopting high-precision dedicated temperature control module and PID intelligent temperature control. Adjustable heating rate
By using high-precision displacement sensors, the displacement resolution accuracy can reach 0.01mm. The measurement range is wide.
Using a stepper motor and driver as the power source, the initial loading of the sample deformation amount is carried out. After reaching the deformation amount, when the sample is immersed in a low-temperature environment, the motor quickly returns to its original position to ensure that the sample is in a freely relaxed state.
The upper clamp has a corresponding counterweight device, which can maintain a slight tension (10KPa~20KPa) on the sample, and at the same time lock the upper clamp in the selected elongation position. After the sample enters the low-temperature groove, the fixing device will automatically open.
The sliding part of the sample holder is made of low friction and very thin materials, basically in a suspended state, with a small contact surface, smooth operation, and low friction. The conversion of the sample rack between low temperature and room temperature is controlled by pneumatic control. Quick and convenient.
The temperature uniform mixing system is equipped with an electric motor and mixing fan to ensure temperature uniformity.
The surface of the evaporator is treated with processes such as Teflon, which has good corrosion resistance
Ethanol (provided by the customer) is used as the thermal conductive medium, with good temperature uniformity.
Adopting French Taikang two-stage fully enclosed compressor, air-cooled. Advanced multi-channel, environmentally friendly and energy-saving (low-noise) mechanical compression refrigeration system. R404A and R23 are environmentally friendly refrigerants that can quickly cool down to -70 ℃.
security system
Overcurrent protection
Temperature over temperature protection
High and low voltage protection

Control mode: computer system
Temperature range: Room temperature~-70.0 ℃
Temperature resolution: 0.1 ℃
Temperature rise control rate: 1 ℃/min. Within any 10 minute interval, the temperature rise error is 10 ℃± 2 ℃
Freezing method: Double stage fully enclosed compressor refrigeration
Cooling medium: Alcohol (to be provided by the customer)
Number of experimental groups: 3 groups or 6 groups, optional
Displacement sensing: high-precision circular magnetic grid
Displacement resolution: 0.01mm (other options available)
Maximum elongation: 175mm
Implementation of initial elongation: freely set by software, automatically controlled by stepper motor and high-precision displacement sensor.
Release fixture system: electric automatic release
Test fixture: I-shaped specimen fixture
Power supply: 3 ∧, AC380V，50/60HZ

rubber