The most common occurrence is at the joint of the mold cooling water pipe. If water leakage is found, the sealing tape should be wrapped around the thread of the pipe joint and then tightened. Due to long-term molding conditions, the waterproof ring in the mold will be damaged, and the O-shaped waterproof rubber ring is easy to harden and crack, resulting in water leakage. Poor installation of some waterproof rings can also cause seal failure. Generally, the installation position and sealing performance of the sealing ring should be checked regularly.

The hole wall of the cooling water hole is damaged. This often happens when trying out a new mold, where the designed wall thickness is sufficient, but the hole wall is broken due to machining errors or post-processing. In most cases, leaking water holes can no longer be used. Overhaul of cooling water holes. It is easy to form scale in the cooling water hole, which hinders heat transfer, and in severe cases, the water channel is blocked, and regular maintenance is required.

For straight water holes, insert a steel rod 0.5mm smaller than the diameter of the cooling water holes and tap with a hammer to remove scale and rust. For the cooling water pipe embedded in the mold, the mold should be decomposed to remove the rust. After the maintenance, a water leakage test should be carried out. The hand pump should be used to fill the water hole with water, and the water should be kept under the pressure of 2MPa for 5 minutes. It is judged whether the water hole is leaking by observing whether the water pressure decreases.

The leaks injection pallet mould can be blocked with elastic materials such as rubber and cork by mechanical fastening, and room temperature curing silica gel can also be used as the blocking material. Regular maintenance and utilization of heating pipes and decompression pumps. The heating tube is an effective heat transfer element and is very effective for core cooling of thin and deep structures. In the parts where the cooling water is easy to pass, setting up a one-way heating pipe can reduce water leakage. In addition, using a decompression pump to suck cooling water is also a method to prevent cooling water leakage.