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How should injection mold be maintained?

As the most important molding equipment in the production and processing process, the quality of injection molds directly affects the quality of products. Moreover, as molds account for a large proportion of enterprise production costs, their service life is directly related to the cost of injection molding products. Therefore, improving the quality of injection mold, maintaining and extending its life cycle are important management contents for injection molding enterprises to reduce costs and improve efficiency.

First of all, each mold should be equipped with a resume card to record and count its 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 extent of wear. This can provide information on finding and solving problems, as well as the molding process parameters of the mold, and the materials used for the product, in order to shorten the trial run time of the mold and improve production efficiency.

Under normal operation of the injection molding machine and mold, test various performance of the mold, and measure the size of the final molded plastic part. Using this information, you can determine the existing status of the mold, identify the damage to the cavity, core, cooling system, and parting surface. Based on the information provided by the plastic part, you can determine the damage status of the mold and maintenance measures.

Focus on tracking and testing important mold components: The role of ejection and guide components is to ensure mold opening and closing movement and ejection of plastic parts. If any part of them gets stuck due to damage, it will lead to production suspension. Therefore, it is necessary to regularly maintain the lubrication of the mold ejector pin and guide pillar (the most suitable lubricant should be selected), and regularly check whether the ejector pin and guide pillar have deformation and surface damage. Once found, it is necessary to replace them in a timely manner; After completing a production cycle, it is necessary to apply professional anti-rust oil to the working surface, movement, and guide components of the mold. Particular attention should be paid to protecting the elastic strength of the bearing parts of the mold with gears, racks, and springs, to ensure that they are always in good condition.

4. As production time continues, the cooling channel is prone to deposit scale, rust, sludge, and algae, resulting in smaller cooling channel sections and narrower cooling channels, greatly reducing the heat exchange rate between the cooling liquid and the mold, and increasing enterprise production costs. Therefore, sufficient attention should be paid to the cleaning of the channel.

The maintenance of hot runner molds, heating, and control systems is particularly important to prevent production failures. Therefore, after the end of each production cycle, the belt heater, rod heater, heating probe, and thermocouple on the mold should be measured with an ohmmeter. If there is any damage, it should be promptly replaced, compared with the mold resume, and recorded in order to timely identify problems and take countermeasures.

Attention should be paid to the surface maintenance of molds, which directly affects the surface quality of products, with the focus on preventing rust. Therefore, it is particularly important to select a suitable, high-quality, and professional rust prevention oil.

After the mold completes the production task, different methods should be taken according to different injection molding materials to carefully remove injection molding residues. Copper bars, wires, and professional mold cleaners can be used to remove residual injection molding and other deposits from the mold and then air dry. It is strictly prohibited to clean hard objects such as wires and steel bars to avoid scratching the surface. If rust spots occur due to injection molding corrosion, they should be polished and sprayed with professional rust preventive oil using a grinder, and then stored in a dry, cool, and dust-free place.