[Technical Issue] What causes grease to flow in high-temperature environments?
In high-temperature environments such as die-casting molds, there are many cases where, despite using high-temperature grease, "the grease flows away during operation."
This phenomenon occurs not simply because the grease melts, but because the oil components separate under high temperatures, making it difficult for the lubricating components to remain in the moving parts.
As a result, this leads to issues such as:
- Oil splattering to the surroundings
- Insufficient lubrication
- Increased frequency of reapplication
In high-temperature environments, it is not only the heat resistance temperature that matters, but also whether the lubrication state can be maintained under high temperatures, which becomes an important point in grease selection.
Detailed causes and considerations for selection are organized technically in the attached document.

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Do you know the reason why grease flows out when temperatures rise? I will explain in an easy-to-understand way the reasons for oil separation and viscosity reduction that are likely to occur in die-casting molds.






