Many premature mold failures are caused by excessive thermal stress. Before each production run, always preheat the mold thoroughly using a mold temperature controller or warm water to reach the required process temperature for the material. This effectively prevents cavity cracking or early surface crazing.Insufficient preheating can also lead to unstable product dimensions and increased internal stress, affecting yield. It is recommended to preheat for at least 30 minutes and monitor temperature uniformity.
For mold solutions equipped with high-performance temperature control, check out ourhttps://www.taizhoumold.com/products.html
When the mold closes, even a tiny flash particle or foreign object can cause the parting surface to collapse or damage the cavity. Before each shift and during production, thoroughly clean residues on the parting surface, sliders, and ejector pins using soft cotton cloth or copper tools.It is recommended to conduct routine inspections every 4 hours and use air guns to blow out deep holes and blind spots. For sticky residues, use mold cleaners and avoid hard scrapers that may scratch the surface.
Never overlook the "moving parts" of the mold. Ejector pins, sliders, guide pins, and other components must be lubricated with high-temperature grease at specified intervals. If they seize up, it not only damages the mold but can also directly cause serious "mold expansion" accidents in the injection molding machine.Different operating temperatures require different grease types—lithium-based grease is suitable for below 150°C, while synthetic grease is needed for high temperatures. Apply until slight overflow; excess grease may contaminate products.
After production ends, many operators just turn off the power. The correct procedure is: spray rust preventive first, then close the mold. Even for short-term storage, blow dry any moisture inside the cavity, spray high-quality rust preventive, and close the mold to prevent dust and moisture erosion.Storage environment humidity should be kept below 60% to avoid condensation from temperature changes. For long-term idle molds (over one month), check rust protection status every two weeks and reapply if necessary.
It is recommended to establish mold maintenance records. After a certain number of cycles (e.g., 50,000 or 100,000 shots), the mold should be removed from the machine for deep maintenance. Check for minor corrosion on the cavity surface, ensure ejector pins are fully, and verify that cooling channels are not blocked by scale. The cost of preventive maintenance is always lower than the cost of remaking a scrapped mold.An automotive parts client extended mold life from 800,000 to 1.5 million shots through deep maintenance every 80,000 shots, saving the cost of a new mold. Regular cooling channel cleaning with descaling agents can improve cooling efficiency by over 30%.
