微波：胶管的发泡主要由微波加热完成。利用微波的热辐射将胶管从内到外加热，当胶管内部刚开始受热发泡时，胶管靠外的胶料相对温度还较低不至于完全硫化导致胶管发不起来。这样从内到外的加热方式保证了胶管能够顺利发泡。
Microwave: the foaming of the hose is mainly accomplished by microwave heating. Microwave heat radiation is used to heat the hose from inside to outside. When the inner part of the hose is just beginning to be heated and foamed, the relative temperature of the rubber outside the hose is still low, so that the hose can not be fully vulcanized. This way of heating from inside to outside ensures that the hose can smoothly foam.
在微波对胶管加热发泡的同时也伴随着硫化，只是此时的硫化没有达到最终的硫化深度。从微波出来后再进入热空气加热段将胶管完成最后的硫化。以完成胶管的硫化与发泡。
At the same time, the microwave heating foaming of rubber tube was accompanied by vulcanization, but at this time the vulcanization did not reach the final vulcanization depth. After the microwave comes out, it enters the hot air heating section to finish the final vulcanization of the hose. To complete the vulcanization and foaming of the hose.