Door sealing form: analyze according to the sealing function, and use this as a premise to determine the sealing form used by the current automobile door sealing strip, and determine what kind of sealing structure should be selected by analyzing the section seal, usually it can be divided into three types types:
The first is to seal the body of the body; the second is to seal the fixed parts and the body after assembly with the body shell; the third is to seal the body after being assembled to the body and need to be used repeatedly. In the actual design process, the appropriate door sealing form should be determined in combination with the actual design needs.
Compression permanent deformation performance of sealing strip: For the sealing strip used in the car door, it is mainly made of sponge rubber, which is foamed and then vulcanized. By applying compressive stress to the vulcanized rubber, after the stress is removed, the vulcanized rubber will A certain change in shape occurs, which cannot be recovered and can be called permanent deformation.
If permanent deformation occurs due to compression, the application performance of the rubber sealing strip itself will decrease after reaching a certain level, and the application value will be lost as time goes by. In other words, in order to determine the quality and service life of sealing strips made of rubber materials, the degree of compression set is an important indicator that plays a decisive role.