① It occurs at the joint of mold cooling water pipe. If water leakage is found, the thread of the pipe joint shall be wrapped with sealing tape and then tightened.

② Under the condition of long-term forming, the waterproof ring in the mold will be damaged, and the O-ring waterproof rubber ring is easy to harden and crack, leading to water leakage. Some waterproof rings are poorly installed

It will cause seal failure. Generally, the installation position and sealing performance of the sealing ring shall be checked regularly.

③ The wall of the cooling water hole is damaged. This often happens when trying out new molds. The designed wall thickness is sufficient, but the hole wall is caused by machining error or post-processing

In most cases, the leaking water hole cannot be used again.

④ Maintenance of cooling water holes. It is easy to form scale in the cooling water hole, which hinders heat transfer. In serious cases, the water path is blocked, and regular maintenance is required. For straight water holes, specific cooling can be inserted

The steel rod with a diameter of 0.5mm smaller than the water hole shall be knocked with a hammer to remove scale and rust. For the cooling water pipe embedded in the mold, the mold should be disassembled to remove rust.

⑤ Regularly overhaul the heating pipe and pressure reducing pump. The heating tube is an effective heat transfer element, which is very effective for core cooling of thin and deep structures. In the parts where the cooling water is easy to pass through, set the

To the heating pipe can reduce water leakage. In addition, cooling water suction by pressure reducing pump is also a method to prevent cooling water leakage.