1. Advantages of injection molding process
1. The injection mold can be used to accurately control the wall thickness distribution of the parison, so that the wall thickness of the resulting container is more uniform, avoiding the thinning phenomenon that is easy to occur in the corner part of the general blow molded product, and the weight of the product can be controlled at + 0.1g, the accuracy of the thread can be controlled within the range of 100μM, the mouth size is accurate, and the narrow neck product has high forming accuracy;
2. The obtained product does not need to be processed E times, without seams, and saves the finishing time of the product;
3. The parisons made by injection can all enter the blow mold for inflation molding, no waste is generated during the processing, and the waste of molding materials is reduced;
4. Products with smooth surface can be obtained, no scratches, and clear characters and patterns on the surface;
5. Small batch production can be carried out economically;
6. A wide range of applications for plastic varieties;
7. High degree of automation, multi-mode production is possible, and production efficiency is high.

2. Disadvantages of injection molding process
1. The molding of the product must use two sets of injection molding and blow molding molds and a hollow core mold with a valve, and the mold of the injection parison should be able to withstand high pressure, and the cost of molding equipment is high;
2. The temperature of the injection parison is higher, and it needs a longer cooling and setting time after being blown in the injection mold, which prolongs the entire molding cycle of the product and affects the production efficiency;
3. The internal stress of the injection parison is large, and it is easy to be unevenly cooled during the mold conversion process. Stress cracking is prone to occur when products with complex shapes and large sizes are produced. Therefore, the shape and size of the products are limited, and they are only suitable for production. Small products used in cosmetics, daily necessities and medicine packaging, food packaging and other fields;
4. Higher requirements on the operating skills of the operators.