Resin drying systems with capability to continuously supply dried resin

A system for drying resin granulates, comprising:

• a first and second drying chamber each defining an internal volume configured to hold the resin granulates;
• a source of heated air in fluid communication with the internal volume of the first drying chamber and the internal volume of the second drying chamber on a selective basis and configured to, during operation, provide heated air to the internal volume of the first drying chamber and the internal volume of the second drying chamber;
• a first vacuum source in fluid communication with the internal volume of the first drying chamber and the internal volume of the second drying chamber on a selective basis and configured to, during operation, generate a first vacuum within the internal volume of the first drying chamber and the internal volume of the second drying chamber;
• a second vacuum source in fluid communication with the internal volume of the first drying chamber and the internal volume of the second drying chamber on a selective basis and configured to, during operation, generate a second vacuum within the internal volume of the first drying chamber and the internal volume of the second drying chamber to draw the resin granulates into the internal volume of the first drying chamber and the internal volume of the second drying chamber;
• a first material valve configured to facilitate discharge of the resin granulates from the internal volume of the first drying chamber on a selective basis;
• a second material valve configured to facilitate discharge of the resin granulates from the internal volume of the second drying chamber on a selective basis;
• and
• a controller configured to control the system so that the resin granulates in the internal volume of the first drying chamber are subjected to at least one of the heated air and the first and second vacuums while the resin granulates are being discharged from the internal volume of the second drying chamber.