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1: After the mold is used for a long time, it is ** to grind the cutting edge, and after grinding, the cutting edge surface ** is demagnetized, and it must not be magnetic, otherwise it is prone to blockage. Mold users should make detailed records and statistics of their use, care (lubrication, cleaning, rust prevention) and damage. Based on this, you can find which parts and components have been damaged and the degree of wear and tear, in order to provide information about finding and solving problems. And the molding process parameters of the mold and the materials used in the product, in order to shorten the test run time of the mold and improve efficiency. Under the normal operation of the injection molding machine and the mold, the various properties of the mold should be tested, and the size of the plastic parts to be molded should be measured. Based on this information, the existing status of the mold can be determined, and the cavity, core, and cooling system can be found. And the damage of the parting surface, etc., according to the information provided by the plastic parts, you can judge the damage status of the mold and maintenance measures.
2: Springs and other elastic parts are easily damaged during use, and usually break and deform. The method adopted is replacement. During the replacement process, we must pay attention to the specifications and models of the springs. The specifications and models of the springs must be confirmed by the three items of color, outer diameter and length, and they can only be replaced if all three items are the same. The quality of the imported spring is better.
3: During the use of the mold, the punch is prone to breakage, bending, and pinching, and the punch sleeve is generally pinching. The damage of the punch and the sleeve is generally replaced with parts of the same specification. The parameters of the punch mainly include the size of the working part, the size of the mounting part, and the length.
4: Fasten the parts. Check whether the fastened parts are loose or damaged. The method adopted is to find the same specifications for replacement.
5: blanking parts such as blanking board, Uli glue, etc., unloading parts such as stripping board, pneumatic jacking and so on. During maintenance, check the relationship between parts and damage, repair the damaged parts, check for air leakage by pneumatic jacking, and take measures for specific situations. Replace if damaged. It is important to track and detect several important parts of the mold: the function of the ejection and guide components is to ensure the mold opening and closing movement and the ejection of the plastic part. If any part of the mold is stuck due to damage, it will lead to the suspension of production, so it should be kept frequently Lubricate the mold thimbles and guide pins (select a suitable lubricant), and regularly check the thimbles and guide pins for deformation and surface damage. Once found, replace them in a timely manner. After completing a cycle, the mold work surface, The anti-rust oil coated on the moving and guide parts should pay special attention to 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 working state; as time continues, the cooling channel It is easy to deposit scale, rust, silt and algae, which makes the cross section of the cooling channel smaller and the cooling channel narrower, which greatly reduces the heat exchange rate between the cooling liquid and the mold and increases the cost of the enterprise. Therefore, attention should be paid to the cleaning of the flow channel; For hot runner molds, the maintenance of the heating and control system is very important to prevent failures.
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