Injection mould maintenance

1. The processing enterprise should first equip each pair of molds with a resume card, which records and statistics 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, so as to provide information to discover and solve problems, as well as the molding process parameters of the molds and the materials used in the products, so as to shorten the test time of the injection moulds. Improve production efficiency.

2. Processing enterprises should test various performance of injection moulds in the normal operation of injection molding machine and molds, and measure the size of the final molding parts. Through this information, the existing state of molds can be determined, and the damage of cavity, core, cooling system and parting surface can be found.

3. Focus on tracking and testing several important parts of the mold: ejection and guide parts are used to ensure the opening and closing movement of the mold and the ejection of the plastic parts. If any part of the mold is stuck due to damage, it will lead to production suspension. Once found, to replace in time; After the completion of a production cycle, professional anti-rust oil should be applied to the working surface, moving and guiding parts of the mold. Especially, attention should be paid to the protection of the elastic strength of the bearing parts of the gear and rack mold and the spring mold to ensure that it is always in the best working condition. As the production time continues, the cooling passage is easy to deposit scale, rust, silt and algae, so that the cooling passage section becomes smaller, the cooling passage narrower, greatly reduce the heat exchange rate between the coolant and the mold, increase the production cost of enterprises, so the cleaning of the flow passage should pay attention to; For the hot runner mold, the maintenance of heating and control system is conducive to preventing 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 by ohmmeter. If there is damage, it should be replaced in time, and compared with the injection mould resume, so that problems can be found timely and countermeasures can be taken.

4, we should pay attention to the surface maintenance of the mold, it directly affects the surface quality of the product, the focus is to prevent rust, therefore, it is particularly important to choose a suitable, high quality, professional rust prevention oil. When the mold completes the production task, the residual injection molding should be carefully removed by different methods according to different injection molding. The residual injection molding and other sediment in the mold can be removed by copper rod, copper wire and professional mold cleaning agent, and then air dry. Do not clean iron wire, steel bar and other hard objects, so as not to scratch the surface. If there are corrosive rust spots caused by injection molding, it is necessary to use a grinder to grind and polish, and spray professional anti-rust oil, and then place the mold in a dry, cool and dust-free place for storage.