How to maintain injection molds
1. The processing enterprise should first equip each mold with a resume card to record and count its use, care (lubrication, cleaning, rust prevention) and damage in detail. Based on this, it can be found which parts and components have been damaged and the degree of wear. Provide information for discovering and solving problems, as well as the molding process parameters of the mold and the materials used in the product to shorten the test run time of the mold and improve production efficiency.
2. Processing companies should test various properties of the mold when the injection molding machine and mold are operating normally, and measure the dimensions of the final molded plastic part. Through this information, the current status of the mold can be determined, and the cavity and core can be found. , cooling system, parting surface, etc., based on the information provided by the plastic part, the damage status of the mold and maintenance measures can be judged.
3. It is necessary to focus on tracking and testing several important parts of the mold: the role of the ejection and guide parts is to ensure the opening and closing movement of the mold and the ejection of plastic parts. If any part of them is stuck due to damage, it will lead to a shutdown, so it should Always keep the mold ejector pins and guide pins lubricated (use the most suitable lubricant), and regularly check whether the ejector pins, guide pins, etc. are deformed and have surface damage. Once discovered, they must be replaced in time; after completing a production cycle, the mold must be inspected The working surface, moving and guide parts should be coated with professional anti-rust oil. Particular attention should be paid to the protection of the elastic strength of the bearing parts of the gear and rack molds and the spring mold to ensure that they are always in the best working condition; with the production As time continues, the cooling channels are prone to deposits of scale, rust, silt and algae, etc., making the cross-section of the cooling channels smaller and the cooling channels narrower, greatly reducing the heat exchange rate between the coolant and the mold, and increasing the production cost of the company. Therefore, the convection channel Attention should be paid to cleaning; for hot runner molds, the maintenance of heating and control systems is particularly important because it helps prevent production failures. Therefore, after 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 compared with the mold history. Compare and keep records so that problems can be discovered in a timely manner and countermeasures can be taken.
4. Pay attention to the surface maintenance of the mold, which directly affects the surface quality of the product. The focus is on preventing 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 the residual injection molding according to different injection moldings. Copper rods, copper wires and professional mold cleaning agents can be used to remove residual injection molding and other sediments in the mold, and then air dry. It is forbidden to clean with 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, spray professional anti-rust oil, and then store the mold in a dry, cool, and dust-free place.
