Multi-blank multi-layer co-extruding blow moulding machine

However, the existing extrusion blow molding machines have the following defects: First, in order to increase the strength, chemical resistance and barrier resistance of the product, it is usually made of two or three layers of different plastic materials, that is, two or three screws Extrude different molten plastics separately, two or three kinds of molten plastics enter the die, and extrude one layer after another. However, the existing three-layer extrusion blow molding machine is a single die, and only one can be extruded at a time. , the work efficiency is low; second, the existing extrusion blow molding machine is a single station, that is, there is only one blow molding system, and its production efficiency is low; third, since the extrusion blow molding machine is a one-step molding machine, when the dough passes through After the die is extruded, it is directly put into the mold, and its temperature is very high. After being blown by the blowing mechanism, a large number of flashes are prone to appear. The existing technology usually undergoes manual trimming to ensure the quality and appearance of the product. However, the workload is heavy and the labor intensity is high, especially for extrusion blow machines with multiple stations (corresponding to multiple mold opening and closing mechanisms), one station requires one trimmer, which consumes a lot of manpower and high labor costs; Fourth, since the extrusion molding machine works continuously, the blowing needle in the blowing mechanism frequently contacts the freshly extruded dough, causing the blowing needle and the blowing core to always be in a high temperature state, and the working performance is affected, thus Directly affect blowing quality