Maintenance of molds

1: After long-term use of the mold, the cutting edge must be ground, and the surface of the grinding edge must be demagnetized without magnetism, otherwise it is prone to material blockage. Enterprises using molds should make detailed records and statistics on their use, care (lubrication, cleaning, rust prevention), and damage. Based on this, they can identify which components and components have been damaged, the degree of wear, and provide information on discovering and solving problems, as well as the molding process parameters and product materials of the mold, in order to shorten the trial run time of the mold and improve production efficiency. Under the normal operation of the injection molding machine and mold, various performance tests should be conducted on the mold, and the dimensions of the final molded plastic parts should be measured. Based on this information, the existing state of the mold can be determined, and the damage to the cavity, core, cooling system, and parting surface can be identified. Based on the information provided by the plastic parts, the damage status and maintenance measures of the mold can be determined.
2: Springs and other elastic components are most susceptible to damage during use, often resulting in fracture and deformation. The method adopted is to replace. During the replacement process, it is necessary to pay attention to the specifications and models of the spring. The specifications and models of the spring are confirmed through three items: color, outer diameter, and length. Only when all three items are the same can they be replaced. The best quality for springs is imported.
3: During the use of the mold, the punch is prone to breakage, bending, and gnawing, and the punch sleeve is generally gnawed. The damage to the punch and punch sleeve is usually replaced with parts of the same specification. The parameters of the punch mainly include the size of the working part, the size of the installation part, and the length size.
4: Tighten the parts and check if they are loose or damaged. The method used is to replace them with parts of the same specification.
5: Pressure parts such as pressure plates, Uni glue, etc., unloading parts such as strippers, pneumatic top materials, etc. During maintenance, check the relationship and damage of various parts of the accessories, repair the damaged parts, and inspect the pneumatic top material for any air leakage. Take measures for specific situations. Replace if the air duct is damaged. Key tracking and testing should be carried out on several important components of the mold: the function of the ejection and guide components is to ensure the opening and closing movement of the mold and the ejection of the plastic part. If any part of it gets stuck due to damage, it will lead to production stoppage. Therefore, it is necessary to regularly maintain the lubrication of the mold ejector pin and guide pillar (using the most suitable lubricant), and regularly check whether the ejector pin and guide pillar have deformation and surface damage. Once found, it should be replaced in a timely manner; After completing a production cycle, professional anti rust oil should be applied to the working surface, movement, and guide components of the mold, with particular attention to protecting the elastic strength of the bearing parts of the mold with gears and racks, and the spring mold, to ensure that it is always in optimal working condition; As the production time continues, the cooling channel is prone to depositing scale, rust, sludge, and algae, resulting in a smaller cross-section of the cooling channel and a narrower cooling channel, greatly reducing the heat exchange rate between the coolant and the mold, and increasing the production cost of the enterprise. Therefore, attention should be paid to the cleaning of the channel; For hot runner molds, the maintenance of heating and control systems is particularly important as it helps to prevent production failures.