1. First, the processing enterprise shall provide each mould with a resume card to record and count its use, care (lubrication, cleaning, rust prevention) and damage in detail, so as to find out which parts and components have been damaged and the extent of wear and tear, so as to provide information for finding and solving problems, as well as the molding process parameters of the mould and the materials used for the products, so as to shorten the trial run of the mould To improve production efficiency.
2. The processing enterprise shall test the various properties of the moldunder the normal operation of the injection molding machine and the mold, and measure the size of the final molded plastic part. Through these information, the existing state of the mold can be determined, and the damage of the cavity, core, cooling system and parting surface can be found out. According to the information provided by the plastic part, the damage state and maintenance measures of the mold can be judged.
3. Several important parts of the mold should be tracked and tested: the function of ejecting and guiding parts is to ensure the opening and closing movement of the mold and ejecting of plastic parts. If any part is stuck due to damage, it will lead to production halt. Therefore, the lubrication of the die thimble and guide pillar should be kept regularly (the most suitable lubricant should be selected), and the deformation and surface damage of the thimble and guide pillar should be checked regularly Once the damage is found, it shall be replaced in time; after the completion of a production cycle, professional antirust oil shall be applied to the working surface, moving and guiding parts of the mould, especially the protection of the elastic strength of the bearing part of the mould with gear and rack and the spring mould, so as to ensure that it is always in the best working condition;
With the continuous production time, the cooling channel is easy to deposit scale, rust, sludge and algae, which makes the cross section of the cooling channel smaller and the cooling channel narrower, 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 mould, the maintenance of heating and control system is helpful to prevent production failure, so it is particularly important. Therefore, after the end of each production cycle, the belt heater, rod heater, heating probe and thermocouple on the mold shall be measured with ohmmeter. If they are damaged, they shall be replaced in time, compared with the mold resume, and records shall be made so that problems can be found in time and countermeasures can be taken.
4. We should pay attention to the surface maintenance of the mould, which directly affects the surface quality of the product, and the key point is to prevent corrosion. Therefore, it is particularly important to choose a suitable, high-quality and professional antirust oil. After the mold completes the production task, different methods shall be adopted according to different injection molding materials to carefully remove the injection residues. Copper rod, copper wire and professional mold cleaner can be used to remove the residual injection molding and other deposits in the mold, and then air dry. It is forbidden to clean hard objects such as wire and steel bar to avoid scratching the surface. If there are rust spots caused by corrosive injection molding, it is necessary to use a grinder to grind and polish, spray with professional antirust oil, and then store the mold in a dry, cool and dust-free place.
As the most important molding equipment, the quality of injection mold is directly related to the quality of products. Moreover, because the mold occupies a large proportion in the production cost of the injection molding enterprises, its service life directly affects the cost of the injection molding products. Therefore, to improve the quality of injection mold, maintain and extend its life cycle is an important issue for injection molding enterprises to reduce cost and increase efficiency.
Due to the variety of products and the frequent replacement of molds, injection molding enterprises usually store the molds in storage until the next production cycle comes. However, some processing enterprises don't pay enough attention to the mold preservation, which makes the mold rust and the surface finish drop during the preservation period, resulting in the decline of product quality and the high rate of waste products. Some molds are even difficult to reuse, so a large amount of money needs to be put into the new mold again, resulting in great waste.
The data shows that the use and maintenance account for 15% - 20% of the factors affecting the service life of the mold, the service life of the injection mold can reach 800000 times generally, and some foreign well maintained molds can even extend another 2-3 times. However, due to neglect of maintenance in domestic enterprises, the service life of injection mold is relatively short, which is only 1 / 5-1 / 3 of that in foreign countries. Due to the short service life of the die, the steel processing time and energy waste, as well as the impact on product quality caused by the loss of billions of yuan per year.
Therefore, the maintenance of injection mold is very important, as follows:
One First of all, the processing enterprise shall provide each mould with a resume card to record and count its use, care (lubrication, cleaning, rust prevention) and damage in detail, so as to find out which parts and components have been damaged and the extent of wear and tear, so as to provide information for finding and solving problems, as well as the molding process parameters of the mould and the materials used for the products, so as to shorten the trial run time of the mould Improve production efficiency.
2. Under the normal operation of injection molding machine and mold, the processing enterprise shall test various properties of mold, and measure the size of the final molded plastic part. Through these information, the existing state of mold can be determined, and the damage of cavity, core, cooling system and parting surface can be found out. According to the information provided by the plastic part, the damage state of mold and maintenance measures can be determined.
3. Several important parts of the mold shall be tracked and tested: the ejecting and guiding parts are used to ensure the opening and closing movement of the mold and the ejecting of the plastic parts.
