The recycled rubber tensile machine is a key equipment for evaluating the tensile properties of recycled rubber and its products, and its test results directly affect the quality control and rational application of recycled rubber.
1、 Testing principle
This device is based on the basic principle of tensile testing in material mechanics. Hold the standardized dumbbell shaped sample of recycled rubber in the upper and lower fixtures, and raise the crossbeam at a constant speed according to the set speed. Apply axial tensile force to the sample until it fractures. The equipment continuously measures and records the tension value and corresponding elongation displacement throughout the entire process, thereby calculating important performance parameters such as tensile strength, elongation at break, and tensile stress, objectively reflecting the elasticity, toughness, and mechanical reliability of recycled rubber.
2、 Core components
Loading framework: Provides stable mechanical support, typically a portal structure, to ensure vertical and uniform loading.
Power drive system: Servo motor or variable frequency motor combined with precision ball screw to achieve smooth and precise movement and speed control of the crossbeam.
Force sensor: a core measuring component that accurately senses the tensile force on the sample and converts it into an electrical signal.
Displacement measuring device: encoder or extensometer, accurately measuring the displacement of the crossbeam or the true deformation of the specimen.
Fixture: Special wedge-shaped or pneumatic fixture to ensure firm clamping of the sample and prevent slipping or premature fracture.
Control system and software: The computer system controls the entire testing process, automatically collects and processes data, generates and prints test report curves.
3、 Operating standards
Sample preparation: Prepare dumbbell shaped samples strictly in accordance with national standards (such as GB/T528), and accurately measure thickness and width.
Equipment calibration: Regularly calibrate the force and displacement systems to ensure accurate data.
Clamp the sample vertically and symmetrically at the center of the upper and lower fixtures, with moderate tightness.
Parameter setting: Set the correct test speed (usually 500mm/min), sample size, and other parameters in the control software.
Run test: Start the device and load smoothly until the sample fractures. Observe the condition of the sample during the testing process.
Data recording and reporting: The software automatically records data such as maximum tensile force and elongation at break, calculates and exports the results. Analyze the stress-strain curve.
Safety and maintenance: Maintain a safe distance during testing. Regularly clean and maintain equipment, especially fixtures and screw parts.
Following the standard operation of the recycled rubber tensile machine can obtain accurate and reliable tensile performance data, providing crucial technical basis for the production quality control, formula optimization, and downstream product application of recycled rubber.