In order to ensure the function and reliability of sealing strip, sealing strip must pass a series of tests and meet various technical requirements.Technical requirements and test types of sealing strip can be roughly divided into 6 categories:
Basic performance test
Basic performance tests for seals include:
1. Material test: including various mechanical properties of the material, including tensile strength, tensile elongation, hardness, density, brittle temperature, water resistance, ozone resistance to aging, ultraviolet resistance, heat resistance to aging, pollution, corrosion, etc.
2. Finished product test: mechanical properties of seal strip, such as compression permanent deformation, compression load, insertion and withdrawal force, low temperature performance, light aging resistance, odor, color and luster, flocking and surface coating wear and peeling test, binding force between various parts, etc.
Reliability and function test
Reliability and function tests include: glass lift life test, door closing force (energy) test and repeated closing (cover) fatigue test, etc.
Noise test: the static sound insulation effect of the sealing strip can be evaluated by measuring the noise shielding of the whole vehicle fitted with the sealing strip. The noise laboratory built by shenya company has been put into trial operation in recent years. The test results show that the noise reduction level of different models of cars is significantly different, providing experimental means for the design and improvement of the sealing strip.The dynamic test is carried out by the vehicle in the wind tunnel.
Weather test: observe the durability of sealing strip under various bad weather conditions.
The loading test of sealing strip is firstly matched on the standard vehicle model and evaluated by three-dimensional measurement in space.Then, the pre-pilot test was carried out on the vehicle body or in small batch production vehicles.Of course, loading tests are also carried out directly on the body of the production car. However, due to the variation of the size and assembly position of each part of the car body and door, it is often necessary to match multiple times to obtain the ideal effect.
Road test is the test of vehicle performance. As an automobile part, the seal strip should be completed together with the vehicle for various weather and road sports car tests.Qualified seals shall maintain good performance after these tests.