Mold closing energy storage time

What is mold closing?

Mold closing is a crucial process in injection molding, where precision and control are paramount. This article delves into the detailed steps of mold closing, highlighting the significance of each phase to prevent mold damage and ensure the longevity and accuracy of the molds.

How to reduce the cooling time of a mold?

Ensuring smooth injection filling while using the lowest possible barrel temperature can reduce the cooling time. Optimizing the mold’s water channel design can enhance heat exchange efficiency and product cooling uniformity, shortening the cooling time.

How does a mold close?

Mold closing movement exerts force to close the mold halves, affecting closure precision (Rosato et al., 2000). Injection pressure (bar) forces molten plastic into the mold, with higher pressures for complex molds or thin sections (Osswald and Hernandez-Ortiz, 2006).

Does reducing cycle time reduce energy consumption in a molding shop?

Literature data show that in a typical molding shop, a reduction of cycle time by 25% reduces specific energy consumption by 10 – 20%. Cycle time can often be reduced by low cost actions to improve the effectiveness of tool cooling.

How long does a mold take to eject?

Influenced by machine size and mold structure. Mold core structures, mold rack transmission mechanisms, and three-plate mold mechanisms can all impact this time. Typically, 80T~200T takes 4~8s, 200T~500T takes 6~10s, and 500T~1000T takes 8~15s. Determined by ejection speed, ejection stroke, and ejection method (automatic, manual, or robotic).

What are the three stages of mold opening & closing?

Mold opening usually consists of three stages: slow-fast-slow opening. By optimizing the speed and position of mold opening and closing, we can reduce this time. Newly designed injection molding machines come equipped with regenerative mold hydraulic circuits, allowing for faster mold closure speeds.