How to effectively maintain the injection mold

1. The processing enterprise should first equip each pair of molds with a resume card to record and count its use, care (lubrication, cleaning, rust prevention) and damage in detail. Based on this, it can find out which parts and components have been damaged and the degree of wear. Provide information on discovering and solving problems, as well as the molding process parameters of the mold, and the materials used in the product, so as to shorten the trial run time of the mold and improve production efficiency.

2. 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, and use this information to determine the current state of the mold and find the cavity The damage to the core, cooling system and parting surface, etc., can be judged according to the information provided by the plastic part to determine the damage status and repair measures of the mold.

3. Focus on tracking and testing of several important parts of the mold: The ejector and guide parts are used to ensure the opening and closing movement of the mold and the ejection of the plastic part. If any part of the mold is stuck due to damage, it will cause production to stop. Therefore, the mold thimble and guide post should be kept lubricated (the most suitable lubricant should be selected), and the thimble, guide post, etc. should be regularly checked for deformation and surface damage. Once found, they should be replaced in time; after completing a production cycle, It is necessary to apply professional anti-rust oil to the mold working surface, moving and guiding parts, and special attention should be paid to the protection of the elastic strength of the bearing parts of the gear, rack mold and the spring mold to ensure that they are always in the best working condition; As the production time continues, the cooling channel is prone to deposit scale, rust, silt and algae, which reduces the cross-section of the cooling channel and narrows the cooling channel, which greatly reduces the heat exchange rate between the coolant and the mold, and increases the production cost of the enterprise. Therefore, attention should be paid to the cleaning of the runner; 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 each production cycle, the band heaters, rod heaters, heating probes and thermocouples on the mold should be measured with an ohmmeter. If they are damaged, they should be replaced in time and checked with the mold history. Compare and keep records so that problems can be discovered in time and countermeasures can be taken.

4. Pay attention to the surface maintenance of the mold. It directly affects the surface quality of the product. The focus is on preventing corrosion. 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 the residual injection molding according to different injection molding. Copper rods, copper wires and professional mold cleaning agents can be used to remove the residual injection molding and other deposits in the mold, and then air dry. It is forbidden to clean up hard objects such as iron wires and steel bars to avoid scratching the surface. If there are rust spots caused by corrosive injection molding, use a grinder to grind and polish, and spray professional anti-rust oil, and then store the mold in a dry, cool, and dust-free place.