Abstract: A lifting device for additive manufacturing and an operational method thereof are provided. The lifting device has a base, a processing module, a powder feeding module, a linkage module, and a lifting module. The base is formed with a processing space and a powder feeding space. The processing module has a processing base, and the powder feeding module has a powder feeding base. The processing base and the powder feeding base are driven and moved by the lifting module. Thereby, two power sources of a traditional lifting device can be integrated into a single power source.

Abstract: A 3D printing device for recycling powders and an operation method thereof are provided. The 3D printing device for recycling powders has a base, a processing plate, an optical module, and a powder conveying module. The speed of production process of 3D printed workpieces can be increased, the waiting time in the production process can be reduced, and the process stability can be improved by disposing the powder conveying module.

Abstract: An electricity supply tool holder for a machining center is provided, and has: a holder body, a stationary coil portion, a rotating coil portion, a lateral fixing portion, and an electrical machinery. The stationary coil portion is provided with a primary coil therein; the rotating coil portion is correspondingly provided with a secondary coil therein; and the lateral fixing portion is fixed on a side of the stationary coil portion used for removably combining with a machining center. When the tool holder is rotated, an external electric power/signal can be transmitted through the lateral fixing portion to the primary coil, then inducing the secondary coil, then the electric power/signal is transmitted to the electrical machinery. Additionally, the lateral fixing portion can be switched into a locked position to temporarily limit rotation, so that it can be used in a machining center of an Automatic Tool Changing (ATC) system.

Abstract: An electricity supply tool holder for a machining center is provided, and has: a holder body, a stationary coil portion, a rotating coil portion, a lateral fixing portion, and an electrical machinery. The stationary coil portion is provided with a primary coil therein; the rotating coil portion is correspondingly provided with a secondary coil therein; and the lateral fixing portion is fixed on a side of the stationary coil portion used for removably combining with a machining center. When the tool holder is rotated, an external electric power/signal can be transmitted through the lateral fixing portion to the primary coil, then inducing the secondary coil, then the electric power/signal is transmitted to the electrical machinery. Additionally, the lateral fixing portion can be switched into a locked position to temporarily limit rotation, so that it can be used in a machining center of an Automatic Tool Changing (ATC) system.