No matter what type of mechanical equipment, the role of lubricating oil is very important, the role of lubricating oil is actually very simple, mainly in order to reduce the coefficient of friction of machinery, so that it can play a lubricating role. According to the manufacturer, the molding press should add lubricating oil to all the oil cups, oil holes and friction surfaces before use, and run empty so that each friction surface is covered with oil film, thereby extending the service life of the machine. In fact, the filling of lubricating oil can be said to be part of the maintenance, in the usual maintenance, the staff should check whether the lubricating oil of the machine is enough.