1: After the mold is used for a long time, the cutting edge must be ground. After grinding, the cutting edge surface must be demagnetized without magnetism, otherwise it is easy to block materials. The mold using enterprise shall make detailed records and statistics on its use, care (lubrication, cleaning, rust prevention) and damage, so as to find out which parts and components have been damaged and the degree of wear, so as to provide information and materials for finding and solving problems, as well as the molding process parameters and materials used in the products, so as to shorten the test run time of the mold and improve the production efficiency. Under the normal operation of the injection molding machine and mold, test various performances of the mold, and measure the size of the finally formed plastic parts. Through this information, we can determine the existing state of the mold, find out the damage of the cavity, core, cooling system and parting surface, and judge the damage state and maintenance measures of the mold according to the information provided by the plastic parts.

2: Spring and other elastic parts are most easily damaged in the process of use, usually fracture and deformation. The method adopted is replacement. In the process of replacement, we must pay attention to the specification and model of the spring. The specification and model of the spring are confirmed by three items: color, outer diameter and length. It can be replaced only when the three items are the same. The quality of the spring is better than that of the imported one. The famous brands include Raymond mould spring, etc.

3: During the use of the die, the punch is easy to break, bend and chew, and the punch sleeve is generally chewed. The damaged punch and punch sleeve are generally replaced with parts of the same specification. The parameters of punch mainly include working part size, installation part size, length size, etc.

4: Fasten the parts and check whether the fastening parts are loose and damaged. The method is to find parts of the same specification for replacement.

5: Pressing parts such as pressing plate and Youli glue, and unloading parts such as stripper plate and pneumatic jacking. During maintenance, check the relationship of accessories and whether they are damaged, repair the damaged parts, check whether there is air leakage by pneumatic jacking, and take measures for specific conditions. Replace the air pipe if it is damaged. It is necessary to focus on tracking and testing several important parts of the mold: the function of ejector and guide parts is to ensure the opening and closing movement of the mold and the ejection of plastic parts. If any part of it is stuck due to damage, it will lead to shutdown. Therefore, the lubrication of the ejector pin and guide post of the mold should be maintained frequently (the most suitable lubricant should be selected), and the ejector pin and guide post should be checked regularly for deformation and surface damage, Once found, it shall be replaced in time; After a production cycle is completed, professional antirust oil shall be applied to the working surface, motion and guide parts of the die, especially the protection of the elastic strength of the bearing parts of the die with gear and rack and the spring die, so as to ensure that it is always in the best working state; With the continuous production time, scale, rust, sludge and algae are easy to deposit in the cooling channel, which reduces the cross section of the cooling channel and narrows the cooling channel, greatly reduces the heat exchange rate between the coolant and the mold and increases the production cost of the enterprise. Therefore, attention should be paid to the cleaning of the channel; For hot runner mold, the maintenance of heating and control system is conducive to prevent production faults, so it is particularly important.