The invention discloses a method for producing plastic pallets by using a hollow blow molding machine. The original air outlet of one air blowing hole at the bottom of the front mold of a traditional plastic pallet is sealed, and five air blowing needles are arranged on the molding surface of the front mold by using the air passage of the original bottom air blowing hole. After the parison comes down, the bottom of the tubular hollow parison is clamped and mold closing starts; meanwhile, pre-blowing is performed from the air blowing port on the extruder to the hollow position of the tubular hollow parison, and pre-blowing stops when the tubular hollow parison expands to the set size. Mold closing continues, at this time the five air blowing needles slowly approach the hollow parison: first the longest central air blowing needle at the center pierces the hollow parison for blowing, then the corner air blowing needles with the same length at the four corners pierce the hollow parison for blowing, realizing simultaneous side blowing at five points, which can make the pallet parison adhere to the mold cavity surface uniformly and tightly instantaneously. Finally, a method for producing plastic pallets with uniform wall thickness, high strength, low raw material consumption, low cost, stable quality and high efficiency is provided.
Country Code: CN
Application Number: CN201710080305.1
