What is the foaming process of the hose?

Microwave: Hose foaming is mainly completed by microwave heating. The use of microwave heat radiation will be heated from the inside to the outside of the hose, when the inside of the hose has just begun to be heated by the foam, the hose against the outside of the relative temperature of the rubber is still low not to fully vulcanized resulting in the hose can not be sent up. This way of heating from the inside to the outside ensures that the hose can be foamed smoothly.
The microwave heating of the hose is accompanied by vulcanization, but the vulcanization at this time does not reach the final depth of vulcanization. From the microwave out and then into the hot air heating section to complete the final vulcanization of the hose. To complete the vulcanization and foaming of the hose.