Blowing mold rapid exhaust device

The invention belongs to the technical field of molds, and discloses a blowing mold rapid exhaust device which comprises a mold cavity provided with a blowing needle hole, a plurality of exhaust grooves are formed in the inner wall of the blowing needle hole in the axial direction, the diameter of each exhaust groove is one sixteenth of the perimeter of the blowing needle hole, and a gap exists between each exhaust groove and the outlet end of the blowing needle hole. When a blowing needle pierces to blow and the pressure is maintained, it is ensured that the gas does not leak from the exhaustgrooves, during exhausting, the blowing needle retreats, one part of high-pressure gas in a blow molding product is exhausted from an exhaust valve along a blowing pipe through the interior of the blowing needle, and the other part of high-pressure gas enters the exhaust grooves from the tapered part of the head of the blowing needle, is directly exhausted into the atmosphere without passing through a pipeline and a valv