Overview of maintenance issues in plastic mold processing

Plastic Mold

4 years ago

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. According to this, it can be found which parts and components have been damaged and the degree of wear and tear. Provide information and materials for finding 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. The processing enterprise should test the various performances 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. , The damage of the cooling system and the parting surface, etc., according to the information provided by the plastic parts, you can determine the damage state of the mold and maintenance measures.
3. Several important parts of the mold must be tracked and inspected: the function of ejection and guide parts is to ensure the opening and closing movement of the mold and ejection of plastic parts. If any part of them is stuck due to damage, it will lead to the suspension of production, so it should be Always keep the mold thimble and guide column lubricated (select the most suitable lubricant), and regularly check the thimble, guide post, etc. for deformation and surface damage. Once found, they should be replaced in time; after completing a production cycle, the mold Apply professional anti-rust oil to the working surface, motion and guide parts, especially the protection of the elastic strength of the bearing parts with gears, rack molds and spring molds to ensure that they are always in the best working state; with production As the time continues, the cooling channel is prone to deposit scale, rust, sludge, algae, etc., which makes the cross section of the cooling channel smaller and the cooling channel narrower, which greatly reduces the heat exchange rate between the coolant and the mold and increases the production cost of the enterprise. The cleaning should be paid attention to; 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 the end of each production cycle, the belt 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 carried out with the mold resume Make comparisons and make records so that problems can be found in time and countermeasures can be taken.
4. Pay attention to the surface maintenance of the mold, which directly affects the surface quality of the product, and the focus is to prevent rust. Therefore, it is particularly important to choose a suitable, high-quality, professional anti-rust oil. After the mold completes the production task, different methods should be used to carefully remove residual injection according to different injections. Copper rods, copper wires and professional mold cleaning agents can be used to remove residual injection and other deposits in the mold, and then air dried. It is forbidden to clean hard objects such as iron wire and steel bar to avoid scratching the surface. If there are rust spots caused by corrosive injection, use a grinder to polish and spray with professional anti-rust oil, and then store the mold in a dry, cool and dust-free place.