The invention relates to a blow molding method and a blow molding mold for a blow molding machine. The method comprises the following steps in sequence: Step 1) After the extruder extrudes a parison, the parison is sent into a mold cavity composed of a left half mold and a right half mold. Inserts are arranged circumferentially along the mold parting line during mold closing to form a closed blow molding space. Pre-blowing and main blowing are sequentially applied to form and solidify the parison into a product, with inserts on an insert support welded inside the product; Step 2) Gas inside the product is exhausted, the left and right half molds are opened, and the core rods of the inserts and insert support withdraw from the parting line as the mold opens. The molds close again for a second blow molding, removing parison material at the parting line after insert withdrawal as flash and sealing the core-pulling holes. The method achieves good effect and high production efficiency. The produced product has no core-pulling holes, solving the problem of sealing such holes.
Country Code: CN
Application Number: CN201210515217.7
