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How to prevent water ingress in vertical injection molding machines?

Below is a guide to flood prevention for vertical injection molding machines.

If you have the following conditions:

1. Raise the machine by half a meter to one meter. If unable to elevate, prepare sandbags or raw materials to block the doors to prevent floodwaters from entering the factory area.

2. Prepare a pump for drainage to be ready for flooding into the factory area.

3. Dismantle the mold, empty the material from the barrel, then turn off the main power and cut off the power supply to all injection molding machines and auxiliary machines in the expected disaster area due to typhoon.

4. To reduce water damage to electrical components, remove important electrical components, including computer boards, control boxes, power switches, transformers, lubrication pumps, etc. Then, depending on the actual situation, dismantle the motors, etc.

5. For vertical injection molding machines of 120 tons or more, raise the docking plugs of the injection unit and mold locking unit, and waterproof them.

Guidelines for dealing with water ingress in injection molding machines

If a vertical injection molding machine unfortunately encounters flooding, it may cause different degrees of water ingress in the electrical system, hydraulic system, lubrication system, etc. In such a situation, please promptly contact the manufacturer, Tai Fu Machinery, or follow the steps below:

1. Electrical part

  • Disconnect all power sources promptly;
  • After water ingress, immediately remove the computer host battery. Because without removing the battery, individual components/electrical appliances may still be energized, accelerating their rust and corrosion, increasing the difficulty and cost of component repair.
  • Remove all electrical components from the entire electrical box (it is recommended to be operated by professionals), clean them with alcohol, and if necessary, disassemble the parts for cleaning, including I/O boards, power supplies, transformers, contactors, air switches, fans, etc.
  • Use a site drying hopper to thoroughly dry all components. Cleaned components can be layered into the drying hopper. Dry at a temperature of 50~70℃ for 8~10 hours. Test their insulation resistance value to determine if they are completely dry.
  • Check each dried electrical component one by one (operated by professionals). They can only be installed and used if they pass the inspection.

2. Hydraulic part

  • Do not start the motor oil pump after water ingress, as starting the motor will cause water in the hydraulic oil to enter the machine’s hydraulic pipeline, leading to corrosion of metal hydraulic components.
  • Check if the hydraulic oil is contaminated with water by moistening a piece of paper with a little hydraulic oil and igniting it. If it cannot be ignited or there are crackling sounds during combustion, it indicates that there is water in the hydraulic oil, and all hydraulic oil needs to be replaced. Alternatively, use an anhydrous copper sulfate to test for blueness, indicating the presence of water.

If water is found in the hydraulic oil, the hydraulic oil in the tank needs to be replaced. Before adding new oil, wipe the tank clean with a clean cloth.

3. Servo motors and control systems

  • Clean electrical components and circuit boards with alcohol, dry them with a hairdryer, then dry them in an oven or drying hopper at 55℃ for 24 hours.
  • Pay attention to drying the encoders and motor stators of servo motors, as well as protecting the motor bearings to prevent rust.

If you have any further questions, please feel free to contact the manufacturer promptly.

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