The extrusion blow molding machine is a combination of an extruder, a blow molding machine and a clamping mechanism. It consists of an extruder, a parison die, an inflation device, a clamping mechanism, a parison thickness control system and a transmission mechanism. The parison die is one of the important parts that determines the quality of blow molding products. Generally, there are side feed die and center feed die. When large-scale products are blow-molded, the accumulating cylinder-type parison die is often used.
The structure of injection blow molding machine is mainly composed of raw material plasticizing injection part, mold clamping part, rotary table, demoulding device, mold, auxiliary device and control system. The working process is to put the uniformly mixed raw materials into the molding machine according to the requirements of the product molding material formula.
After entering the barrel, the raw material is melted, the screw is moved forward, and the molten material is injected into the parison forming cavity of the mandrel to be formed, the parison is cooled, and then the parison is opened and blown to the lower half cavity of the station to close the mold , is clamped by the mold, and at the same time, compressed air is blown into the center hole of the mandrel, and the parison is inflated and tightly attached to the cavity wall to become the shape of the product, and the mold is opened after cooling and shaping; the rod takes the product again. Rotate 120° to the demolding station, the product is pushed out from the mandrel, and the raw material plasticization, injection molding, inflation molding, cooling and demolding process of the product production are completed.
The above is all about the difference in the structure of the blow molding machine. I hope my article will be useful to you.
