Injection mold maintenance

Injection mold maintenance

First of all, each pair of molds should be equipped with a resume card to record and count the use, care (lubrication, cleaning, rust prevention) and damage in detail. Based on this, it can be found which parts and components have been damaged and the degree of wear and tear to provide discovery and resolution Information of the problem, 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.

Secondly, 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 existing state of the mold can be determined, and the cavity, core, According to the information provided by the plastic parts, the damage state of the cooling system and the parting surface can be judged, and the damage state and maintenance measures of the mold can be judged.

It is necessary to carry out key tracking and detection of several important parts of the mold: the function of the ejection and guide parts is to ensure the opening and closing movement of the mold and the ejection of the plastic parts. If any part of them is stuck due to damage, it will cause production stoppage, so it should be kept frequently Lubricate the thimble and guide post of the mold (select the most suitable lubricant), and regularly check the thimble and guide post for deformation and surface damage. Once found, they should be replaced in time;

After the completion of a production cycle, professional anti-rust oil should be applied to the mold working surface, motion, and guide parts, especially the protection of the elastic strength of the bearing part of the gear, rack mold, and spring mold to ensure that it is always In the best working condition;

As the production time continues, the cooling channel is prone to deposit scale, rust, sludge, algae, etc., making the cross section of the cooling channel smaller and the cooling channel narrower, 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 flow channel;

For the hot runner mold, the maintenance of the heating and control system is beneficial 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.

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