The main flow of rubber sealing strip includes three parts: rubber mixing, extrusion vulcanization and post processing.

In the process of mixing, the formula of various raw materials and processing conditions such as temperature, pressure and time are strictly controlled by computer. Preparation of granular or banded compound. For PVC and TPE sealing strip generally can directly choose the appropriate particle material for extrusion processing.

In the actual production of rubber sealing strip, generally the extrusion and vulcanization process together. In the process of extrusion sulfide, all kinds of granulated or ribbon mixing rubber and skeleton materials together by extruder die compound extrusion, and the high temperature vulcanization, in this process, mouth mold design and manufacturing and sulfide, conditions for the product performance and quality plays a key role, if mouth cause sealing strip in the extrusion die design not ignore fluctuating pressure and cross section, The dead Angle of the flow channel will cause the defects such as coke of the glue and poor combination of different flow channel materials. Using computer software to simulate flow state and digital die technology can improve die quality and shorten the period of die design and manufacture. Both over-sulfur and under-sulfur will have a bad effect on product quality. In the vulcanization process, salt bath vulcanization because of easy to produce pollution to the environment has rarely been used, now most factories are using microwave and hot air heating method, through computer control of the temperature, speed, pressure of each point of the production line, can ensure the ideal vulcanization conditions and extrusion quality. According to the different parts of the sealing strip installation, some sealing strips need to be flocking on the surface, spraying and adding self-adhesive on the sealing strip holding part. These processes can be completed online through special devices.

For PVC and TPE sealing strip without vulcanization, other processes and rubber sealing strip extrusion similar.

The post-processing process can be divided into three main processes: cutting, molding (joint, joint Angle) and post-processing. In the cutting process, the sealing strip needs to be processed to the required shape and size, in order to ensure its good machining accuracy and interchangeability, the use of multi-station joint processing equipment can achieve more satisfactory results. In the molding process. Injection vulcanization molding is usually used to ensure accurate shape. In recent years, more and more vehicles adopt combined sealing strips, which compound several sections together. The post-processing process is developing towards combination and modularization.

The post-treatment process includes wire flocking and spraying, the installation of fixed seal pin and double-side tape and fine trimming work, for some high-grade cars, in the post-treatment implanted sensors, when the stress reaches a certain value after the signal, can control the work of the car window lifting motor, and has the function of preventing clamping. For mass-produced products, the application of pipelined production lines and robots in post-processing processes is the trend of development.