Maintenance of Plastic Injection Mold
1. The production and processing company first needs to configure a resume card for each pair of molds, detailed description and statistical analysis of its application, medical care (wetting, cleaning, anti-rust treatment) and damage conditions, and can find out whether there are components, parts damage, and damage levels The size is used to show the information content materials that find and solve the difficulties, and the main parameters of the forming process of the abrasive tool, and the commonly used raw materials of the product, so as to reduce the trial operation time of the abrasive tool and improve the productivity.
2. The production and processing company should test the various properties of the mold under the normal operating conditions of the injection molding machine and the mold, and measure the dimensions of the finally formed plastic part. According to the information content, the current status of the mold can be determined, and the cavity, The damage of the core, cooling system and parting surface, etc., can be judged according to the information content presented by the plastic part to determine the damage of the mold and its maintenance measures.
3. Focus on tracking and testing of several important parts of the mold: the function of ejector and guide members is to ensure the opening and closing movement of the mold and the ejection of plastic parts. Always keep the mold thimble and guide post moisturized (the most suitable lubricant should be selected), and regularly check whether the thimble, guide post, etc. are deformed and surface damaged. Once found, replace it in time;
4. After completing a production cycle, it is necessary to apply professional anti-rust oil to the mold working surface, movement, and guide components. Pay special attention to the protection of the elastic strength of the bearing parts of the gear, rack mold and the spring abrasive. Ensure that it is always in the best working condition; as the production time continues, the cooling channel is prone to deposit scale, rust, silt and algae, etc., so that the cross-section of the cooling channel is reduced, the cooling channel is narrowed, and the gap between the coolant and the mold is greatly reduced. The heat exchange rate increases the company's production costs, so the cleaning of the runner should be paid attention to; for the hot runner mold, the heating and control system maintenance are helpful to prevent the occurrence of production failures, so it is particularly important. Therefore, after the end of each production cycle, the belt-type electric heater, rod-type electric heater, heating probe and its thermocouple on the mold should be measured with an ohmmeter.
