1. Medium-capacity containers or hollow products. This type of product requires a larger extrusion volume of the parison, and the corresponding parison extrusion time is also longer. In this way, the inflation and cooling of the parison and the demolding of the product can be performed simultaneously, and completed in the same cycle, realizing continuous extrusion blow molding.

This molding method can continuously blow molding 5-50L containers. If plastic materials with high melt viscosity and high strength are selected, due to the improvement of the sag phenomenon of the parison's own weight, a container with a larger volume can be formed.

2. Large batches of small containers. The amount of parison required for the production of bottle containers is small, and the inflation molding of the parison cannot be completed within the extrusion time of one parison. If two or even larger molds and clamping devices are used for mass production of small containers, the molding cycle of the blow molding volume can be relatively delayed, and continuous extrusion blow molding can be realized.

3. Plastic bottles and hollow products with poor thermal stability such as PVC. Because it is a continuous extrusion parison, the residence time of the material in the extrusion process is short, and it is not easy to degrade, so the blow molding of PVC and other plastics can be carried out in a long-term and stable manner. This molding method is also suitable for blow molding of LDPE, HDPE, PP and other plastics.