Degradation film blowing machine double-air-opening air ring

The invention relates to film blowing machine air rings, in particular to a degradation film blowing machine double-air-opening air ring. The degradation film blowing machine double-air-opening air ring is made of whole cast aluminum and comprises a fixing seat located at the bottom, a bottom air disc, an upper air disc, an upper air lip and a lower air lip. The fixing seat is fixed to the bottom of the bottom air disc, the bottom of the bottom air disc is furthermore provided with an air inlet, and the bottom air disc and the upper air disc form an annular main air flue; the inner side of the annular main air flue is provided with an annular center air chamber, the upper air lip and the lower air lip are arranged on the inner side of the upper air disc, an upper air outlet of the upper air lip and a lower air outlet of the lower air lip both communicate with the annular center air chamber, and the top of the upper air lip is provided with a plurality of rows of annular heat dissipation holes. According to th