Car windshield seal windshield seal three-port seal EPDM rubber

Automotive sealing strip production process and extrusion
Automotive rubber sealing strips are extruded using cold feed extruders. The extruder heads include single heads, composite (double composite and multi-composite) heads and shearing machines. head. Among them, the screw length-to-diameter ratio of the microwave vulcanization extruder is generally , and the screw length-to-diameter ratio of the shear head vulcanization extruder is greater than .
, Vulcanization
The semi-finished rubber sealing strip extruded by the cold feed extruder is vulcanized using a continuous vulcanization process. The vulcanization methods include microwave vulcanization, shear head vulcanization, salt bath vulcanization and ebullating bed vulcanization (also It is called vulcanized bed vulcanization, the heating medium is medium glass beads, the temperature is ℃), hot air vulcanization (only applicable to silicone rubber sealing strips) and high-speed hot air vulcanization (the air flow rate is -, the temperature is ℃). High-speed hot air vulcanization has slow heat transfer speed and high energy consumption of heating equipment (three times that of microwave vulcanization heating equipment and three times that of shear head vulcanization equipment).