In order to judge the damage state of the mold and the maintenance measures. The processing enterprise should test the various properties 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. Through this information, the existing state of the mold can be determined, and the cavity, core, and cooling can be found. Damage to the system and the parting surface.

At the same time, it is necessary to carry out key tracking detection on several important parts of the mold: the function of the ejection and guiding parts is to ensure the opening and closing movement of the mold and the ejection of the plastic parts. If any part of it is stuck due to damage, it will lead to production stoppage. Therefore, the thimble and guide column of the mold should be kept lubricated (the most suitable lubricant should be selected), and the thimble and guide post should be regularly inspected for deformation and surface damage. Once found, it should be replaced in time; after completing a production cycle, it is necessary to apply professional anti-rust oil to the working surface, movement and guiding parts of the mold, especially the elastic strength of the bearing parts with the gears, rack and die and the spring mold. Protection to ensure that it is always in the best working condition; as the production time continues, the cooling channel is easy to deposit scale, rust, sludge and algae, which makes the cooling channel section smaller, the cooling channel narrows, greatly reducing the coolant and The heat exchange rate between the molds increases the production cost of the enterprise, so the cleaning of the flow path should be paid attention to; for the hot runner mold, the maintenance of the heating and control system is beneficial to prevent the occurrence of production failure, so it is especially important. Therefore, after each production cycle, the belt heater, rod heater, heating probe and thermocouple on the mold should be measured with an ohmmeter. If it is damaged, it should be replaced in time and with the mold history. Compare and make records so that problems can be discovered at the right time and countermeasures can be taken.

The surface maintenance of the mold can not be ignored, it directly affects the surface quality of the product, the focus is to prevent rust, therefore, choose a suitable, high quality, professional rust prevention Oil is especially important. After the mold has completed the production task, the residual injection molding should be carefully removed according to different injection molding methods. The residual injection molding and other deposits in the mold can be removed by using copper rods, copper wires and professional mold cleaning agents, and then air-dried. Disable the cleaning of hard objects such as wire and steel bars to avoid scratching the surface. If there is rust caused by corrosive injection molding, use a grinder to grind and polish, spray professional anti-rust oil, and then store the mold in a dry, cool, dust-free place.