The parison used in extrusion blow molding of blow molding toys is obtained by extrusion. The production process is divided into two types: continuous and intermittent. Continuous extrusion blow molding is to use an extruder to continuously manufacture parisons ([continuous extrusion blow molding] continuous extrusion blow molding), and the parisons enter into the split molds on a turntable one by one, and then are closed in turn. Molding, inflation, cooling, ejection and other operations. This method is used for the rapid production of small articles such as bottles. Batch extrusion blow molding, typically used to produce large articles. Due to the large amount of raw materials required for large-scale products, a storage cylinder type head is used. After the plastic melt from the extruder is stored in a storage tank to a certain amount, the tubular plunger is lowered by hydraulic pressure, and the melt is extruded through a die, and the formed blank is then shaped by a general inflation method. Due to this method, the die resistance is small, the material is pressed quickly, the parison vertical elongation is small, and the wall thickness of the product is evenly distributed. Commonly used in the production of high molecular weight polyethylene large containers. Suzhou blow molding processing

The parison for hollow blow molding of blow molding toys is obtained by injection molding. The parison is left on the core mold of the mold, and then the parison is transferred to the blow mold, compressed air is introduced from the core mold, the parison is inflated, cooled, and then transferred to a station for demoulding, that is, the product is obtained. The advantages of this method are that the wall thickness of the product is uniform, the weight tolerance is small, the post-processing is less, and the waste edge is less. However, when blowing large parts, the mold cost is high. Therefore, it is suitable for the production of small refined products in large batches.