Maintenance measures for injection molding tool

Maintenance measures for injection molding tool

07 Sep 2021

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 to shorten the trial run time of the mold and improve production efficiency.

2. The processing company 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 current state of the mold can be determined, and the cavity and core can be found. , Cooling system and parting surface, etc., according to the information provided by the plastic parts, the damage state of the mold and the repair measures can be judged.

3. Focus on tracking and testing several important parts of the mold: the ejector and guide components 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 cause the production to stop. Always keep the mold thimble and guide post lubricated (the most suitable lubricant should be selected), and regularly check whether the thimble, guide post, etc. are deformed and surface damage, once found, they must be replaced in time; after completing a production cycle, the mold must be The working surface, moving and guiding parts are coated with professional anti-rust oil, and special attention should be paid to the protection of the elastic strength of the bearing parts of gears, rack molds and spring molds to ensure that they are always in the best working condition; Over time, 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, the convection channel Attention should be paid to the cleaning of the hot runner mold; for the hot runner mold, the maintenance of the heating and control system is conducive to preventing 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 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 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.
injection molding tool