Common knowledge and steps of injection mold maintenance

Common knowledge and steps of injection mold maintenance

The processing enterprise should test the various performances of the mold under the normal operation of the injection molding machine and the mold, and measure the size of the final molded plastic part.The existing state of the mold can be determined through these information, and the cavity, core, cooling .According to the information provided by the plastic parts, the damage status of the system and the parting surface can be judged, and the damage status and maintenance measures of the mold can be judged.

It is necessary to carry out key tracking and detection of several important parts of the mold: the function of the ejection and guide components is to ensure the mold opening and closing movement and the ejection of the plastic parts. Lubrication of the thimble and guide post of the mold (the most suitable lubricant should be selected), and regularly check the thimble and guide post for deformation and surface damage.Once found, they should be replaced in time; after completing a production cycle, the mold work surface should be , Sports, and guide parts are coated with professional anti-rust oil, and special attention should be paid to the protection of the elastic strength of the bearing parts with gears, rack molds, and spring molds to ensure that they are always in the best working state; as the production time continues , The cooling channel is prone to deposit scale, rust, sludge and algae, etc., which makes the cross section of the cooling channel smaller and the cooling channel narrower, which greatly reduces the heat exchange rate between the coolant and the mold and increases the production cost of the enterprise. It should be paid attention to; for the hot runner mold, the maintenance of the heating and control system is helpful to prevent the occurrence of production failures, so it is particularly important. Therefore, after the end of each production cycle, the belt heater, rod heater, heating probe and thermocouple on the mold should be measured with an ohmmeter.If there is any damage, it should be replaced in time and carried out with the mold resume Make comparisons and make records so that problems can be found in time and countermeasures can be taken.

Then the last link is to maintain the surface of the mold. The so-called surface is to prevent rust. Therefore, it is particularly important to choose a suitable, high-quality and professional anti-rust oil. After the mold completes the production task, different methods should be used to carefully remove residual injection according to different injections. Copper rods, copper wires and professional mold cleaning agents can be used to remove residual injection and other deposits in the mold, and then air dried. It is forbidden to clean hard objects such as iron wire and steel bar to avoid scratching the surface. If there are rust spots caused by corrosive injection molding, use a grinder to grind and polish, and spray with professional anti-rust oil, and then place the mold in a dry, cool and dust-free place for storage.

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