Rubber stress relaxation testing machine: accurately testing rubber durability

Rubber products, with their excellent elasticity, sealing, and shock absorption properties, are widely used in various fields such as automobile manufacturing, aerospace, construction machinery, home appliances and sanitary ware, as well as hydraulic and pneumatic systems. Core components such as rubber sealing gaskets and shock-absorbing rubber sleeves are subjected to constant deformation, high temperatures, and alternating loads over extended periods. Due to the viscoelastic properties of the materials, stress relaxation issues are prone to occur, leading to failures such as elasticity degradation, seal leakage, shock absorption failure, and component loosening. These are the primary reasons for the long-term failure of rubber products. Therefore, stress relaxation performance testing is a crucial aspect of rubber material research and development, process optimization, and product quality inspection. Rubber stress relaxation testing machines have become precision testing equipment in the rubber and plastics industry.

The equipment adopts the industry-wide constant strain detection principle and is equipped with a high-precision servo closed-loop control system. It can accurately complete the bi-directional constant deformation testing of rubber samples in both tension and compression, locking the displacement parameters of the samples throughout the entire process and highly reproducing the real service conditions of rubber products under long-term compression and tension. The equipment integrates an intelligent constant temperature control box, supporting wide-range temperature adjustment from room temperature to high temperature, and can simulate complex working conditions such as high and low temperature aging, high temperature long-term pressure bearing, etc., meeting the durability testing needs in different scenarios. Equipped with a high-precision force sensing module and intelligent data acquisition system, the equipment can continuously monitor stress relaxation changes in real-time for 24 hours, automatically generate stress relaxation curves, accurately calculate core parameters such as relaxation rate, residual stress, and durability coefficient, ensuring accurate, stable, and repeatable test data.

The entire machine is developed and produced in strict accordance with domestic and international testing standards such as GB/T 1685, GB/T 13643, ISO 289-4, and ASTM D6147. It is compatible with various rubber and plastic materials, including natural rubber, vulcanized rubber, and thermoplastic elastomers, and can meet the testing needs of various shaped rubber samples, such as sheet, ring, and columnar shapes. Equipped with an intelligent touch-control operating system, the device boasts a high degree of automation, eliminating the need for continuous manual monitoring, reducing manual operation errors, effectively enhancing testing accuracy and efficiency, and demonstrating excellent data stability and repeatability.

In practical production and new material research and development, this equipment can assist enterprises in optimizing rubber raw material formulations, improving vulcanization production processes, accurately predicting the long-term durability of rubber products, and proactively identifying quality hazards such as aging relaxation and seal leakage. By addressing these issues at the source, it enhances product stability and service life, steadily increases the pass rate of finished products, and solidifies the market competitiveness of enterprises.