The key to the transnational competition of hollow molding products lies in transportation. According to the average statistical value of our plastic industry, the economy will be greatly reduced if the transportation radius is greater than 800 km. The other is the value of the load of hollow products. When the general load is low-priced drinking water or daily necessities, the increase of container cost will directly affect the sales of content goods. Therefore, low-cost areas may have a competitive advantage in small hollow containers, medicine, cosmetics and gift packaging.

Dalian hollow molding suggests that since the careful line of clamping force reflects the area of molded products of injection molding machine, the clamping force of injection molding machine is often used to represent the specification of injection molding machine, but there is also an approximate proportional relationship between clamping force and injection volume. However, the expression of clamping force can not directly reflect the volume of injection products, and it is not convenient to use.

Therefore, people pay more and more attention to the precision injection molding technology, which makes the precision injection molding technology progress and new technologies emerge. Factors affecting precision injection molding precision injection molding requires that products not only have high dimensional accuracy, low warpage deformation, excellent transfer characteristics, but also have excellent optical properties. Therefore, it has special requirements for injection molding machine, injection mold, molding process, raw material performance and formula. There are many factors affecting precision injection molding.