Abstract: A powder recycling system for a three-dimensional rapid prototyping apparatus is provided. The powder recycling system includes a sealed main body, a negative pressure generator, an air pressure generator, a lighting unit and a heater. When an excess powder removing process is performed to remove excess powder from a three-dimensional object, the excess powder is sieved by a screen mesh and collected by a powder collector. Consequently, the excess powder is recycled.

Abstract: An inkjet chip of printing module of a rapid prototyping apparatus and a control circuit thereof are disclosed. The inkjet chip has a length and a width to define a total area including an unwiring area and a wiring area. The unwiring area has at least three liquid supply slots in parallel with each other and respectively connected to one of the ink chambers of the modular ink cartridge. The wiring area has a control circuit. The control circuit includes a plurality of liquid ejectors. Each liquid ejector has a heating resistor, a driving transistor, and a nozzle. The control circuit is connected to receive a power signal, a printing data signal, a preheating data signal, a preheating control signal, a reverse preheating control signal, a heating control signal, and a reverse heating control signal and connected with the common connection node for controlling the liquid ejector.

Abstract: A rapid prototyping apparatus includes a construction platform, a movable platform, a printing module, a cleaning and maintenance module, a construction material spreading element, a heater and a heat shield. A construction chamber is formed in the construction platform. The movable platform and the construction platform are movable relative to each other. The printing module is installed on the movable platform, and includes at least one printhead unit. The cleaning and maintenance module is installed on the movable platform. The construction material spreading element is installed on the movable platform for spreading a ceramic construction material to the construction chamber. After the ceramic construction material is spread in the construction chamber, the construction material is heated by the heater. After the printhead unit performs a printing operation, the printhead unit is cleaned and maintained by the cleaning and maintenance module.

Abstract: A biomedical 3D rapid prototyping apparatus includes at least one bio-cartridge, a supply container, a construction platform, an identifying and monitoring device, a disinfection and temperature/humidity regulation device, a casing, and a negative pressure device. The bio-cartridge contains a bio-forming fluid, and has a printhead for ejecting the bio-forming fluid. The supply container stores a bio-building material. The bio-building material is spread in a construction chamber of the construction platform to form a construction layer, and the bio-cartridge is moved to the construction layer to print the bio-forming fluid on the construction layer, so that a cellular tissue is formed. The procedure of spreading the bio-building material and the procedure of printing the bio-forming fluid are repeatedly done, so that a transplantable living tissue or organ is quickly produced.

Abstract: An automatic powder recycling apparatus includes a housing, a plurality of isolation elements, an air-blowing device, a powder filtering member, a recycling member and an air-inhaling device. A sealed space is defined within the housing. The air-blowing device is disposed within the sealed space for removing the powder attached on the surface of the finished product. The air-inhaling device is in communication with the first receptacle for allowing the first receptacle to be in a negative pressure state. When the powder on the finished product is removed by the air-blowing device and directed to the powder filtering member by the air-inhaling device, the powder is filtered and blocked by the powder filtering member. When the air-inhaling device is disabled, the powder blocked by the powder filtering member naturally falls down to the recycling member.

Abstract: An automatic printing adjustment method for a page-width array printing device is provided. The page-width array printing device includes a printing module, a scanning module and a print region. Firstly, the printing module prints a print medium placed on the print region to obtain a printed image, and the scanning module scans the printed image of the print medium. Then, the printed image is transmitted from the scanning module to a processor. Then, a noise eliminating operation, a tilt calibration operation, a ROI selecting operation, a horizontal detection operation and a vertical detection operation are performed on the printed image. Afterwards, a calibrating result is feedback from the processor to the printing module. The printing conditions of nozzles of the respective inkjet head structures are adjusted according to the calibrating result.

Abstract: A page-width array printing device includes a page-width array printing mechanism including at least one page-width array printing module. The page-width array printing module includes a printing platform, a first page-width array printing unit and a second page-width array printing unit. The first page-width array printing unit includes a plurality of first inkjet cartridges. The second page-width array printing unit includes a plurality of second inkjet cartridges. The first page-width array printing unit and the second page-width array printing unit are in parallel with each other. The first inkjet cartridges and the second inkjet cartridges are staggered and independently and detachably disposed on the printing platform. Each of the first inkjet cartridges and the second inkjet cartridges includes an inkjet chip. The inkjet chip includes four ink supply channels and a plurality of nozzles so as to perform a monochromatic or polychromatic page-width array printing operation.

Abstract: A polar switch circuit is disclosed. The polar switch circuit comprises the first to the forth transistor switches and the first to the second filter circuits. The first and forth transistor switches are controlled by a first pulse-width modulating signal. The second and third transistor switches are controlled by a second pulse-width modulating signal. The second and the fourth transistor switches are connected with a DC high voltage, and connected with the first and third transistor switches, respectively. The first filter circuit is connected with the first transistor switch, the second transistor switch and a contact of a piezoelectric actuator. The second filter circuit is connected with the third transistor switch, the forth transistor switch and another contact of the piezoelectric actuator. When the first and second pulse-width modulating signals switch high/low level in interlaced, an output AC voltage can be smooth and deliver to the contacts of the piezoelectric actuator.

Abstract: An inkjet head manufacturing method includes the following steps. Firstly, a multilayered structure with a plurality of microstructure layers is provided. The alignment check holes of the microstructure layers are concentric and have different diameters. Then, the microstructure layers are stacked together and the microstructure layers are aligned with each other according to the concentric and different-diameter alignment check holes, wherein a dry film layer is sandwiched between every two adjacent microstructure layers. The preset slots of the microstructure layers are collectively defined as inlet flow channels, ink chambers, pressure cavities and outlet flow channels. Then, the multilayered structure is assembled and positioned through the dry film layers by a thermal compression process. Then, a cutting knife is used to linearly cut the actuator plate over a spacer between every two adjacent pressure cavities and along a path parallel with rims of the pressure cavities.

Abstract: An ink-jet printing module is used for a page-width array ink-jet printer. The ink jet printing module includes a page-width array platen and a plurality of ink-jet cartridges. The page-width array platen has a plurality of receiving cavities arranged as an array. Each of the ink-jet cartridges is detachably and independently embedded into one of the receiving cavities, and includes a body for storing ink, an ink-jet chip to be driven for ejecting the ink, a plurality of nozzles disposed on the ink-jet chip, and a control node for receiving signal to drive the ink-jet chip. The ink-jet chip is disposed on a bottom of the page-width array platen and is driven to eject the ink through the nozzles onto a printing medium.

Abstract: An ink-jet printing module is used for a page-width array ink-jet printer. The ink jet printing module includes a page-width array platen and a plurality of ink-jet cartridges. The page-width array platen has a plurality of receiving cavities arranged as an array. Each of the ink-jet cartridges is detachably and independently embedded into one of the receiving cavities.

Abstract: A fluid transportation device includes a valve supporting module, a first fluid transportation module and a second fluid transportation module. Through the valve supporting module, the first fluid transportation module and the second fluid transportation module may be combined together in a side-by-side arrangement or a vertically-stacked arrangement. The combination of the first fluid transportation module and the second fluid transportation module can increase the flow rate and the pumping head of transporting the fluid. Moreover, the combination of two fluid transportation modules of the present fluid transportation device can be synchronously or asynchronously actuated to increase the flow rate and the pumping head of transporting the fluid. Since the additional coupling mechanism is omitted, the fabricating cost of the present fluid transportation device is largely reduced, and the overall volume of the present fluid transportation device is reduced to comply with the miniaturization requirement.

Abstract: An ink supply structure includes at least one ink cartridge, at least one dye ink chamber, and at least one pigment ink chamber. The at least one dye ink chamber is contained in the at least one ink cartridge for storing a dye ink. The at least one pigment ink chamber is contained in the at least one ink cartridge for storing a pigment ink. One of the dye ink within the dye ink chamber and the pigment ink within the pigment ink chamber is selectively supplied from the at least one ink cartridge.

Abstract: A piezoelectric inkjet head structure includes an upper cover plate, a lower cover plate, a piezoelectric actuating module, a nozzle plate and a seal layer. The piezoelectric actuating module includes an upper piezoelectric chip, a lower piezoelectric chip, a first electrode, a second electrode, a conductive layer and a plurality of flow channels. The entrances of the flow channels of the upper piezoelectric chip and the lower piezoelectric chip are separated from each other by the same spacing interval. The entrances of the flow channels of the upper piezoelectric chip and the entrances of the flow channels of the lower piezoelectric chip are arranged in a staggered form. During operation of the piezoelectric actuating module, ink liquid is introduced into the flow channels of the piezoelectric actuating module from the upper cover plate and the lower cover plate, and then ejected out of the nozzles.

Abstract: A polarity switching circuit includes: a first current-limiting resistor and a second current-limiting resistor connected to a DC high voltage; a first transistor switch, a second transistor switch, a fourth transistor switch, and a fifth transistor switch respectively controlled by a first PWM signal and a second PWM signal; a third transistor and a sixth transistor switch whose control terminals are respectively connected to the first transistor switch and the fourth transistor switch; a first filter connected to the second transistor switch and the third transistor switch and a contact of a piezoelectric actuator; and a second filter connected to the fifth transistor switch and the sixth transistor switch and another contact of the piezoelectric actuator. When the first and the second PWM signal are switching between a high level and a low level, output AC voltages with smoothed AC waveforms are supplied to the contacts of the piezoelectric actuator.

Abstract: Disclosed is a control method for stereolithography structure, including the steps of: providing a stereolithography structure including a main circuit system, an interface system, and a USB transmission interface.

Abstract: A single-nozzle inkjet head includes a first chamber member and a second chamber member. The first chamber member has a first flow channel. The second chamber member is detachably connected with the first chamber member. The second chamber member includes a main body, a nozzle plate and an actuator. The main body has a second flow channel, wherein the second flow channel is in communication with the first flow channel for transporting a fluid. The nozzle plate is disposed on the main body, and has a nozzle. The actuator is disposed on the nozzle plate, and located around the nozzle.

Abstract: A closed nebulizing system for removing bubbles includes a first pump, a nebulizing module and a second pump. The first pump is for providing a fluid. The nebulizing module includes an outlet channel, an inlet channel connected with the first pump, and a plurality of nozzles for nebulizing and ejecting part of the fluid. The second pump is connected with the outlet channel for outputting non-nebulized fluid. The first pump, the nebulizing module and the second pump form a closed fluid loop, so that the fluid continuously contacts with the plurality of nozzles and bubbles generated during nebulization process are evacuated from the nebulizing module.

Abstract: A power supply integrated circuit includes a DC-DC boost regulating unit and a DC-AC output controlling unit. The DC-DC boost regulating unit is used for increasing a low DC voltage into a high DC voltage. The DC-AC output controlling unit is connected with the DC-DC boost regulating unit for converting the high DC voltage into a high AC voltage. A first portion of an integrated circuit chip and a plurality of passive components are collaboratively defined as the DC-DC boost regulating unit. A second portion of the integrated circuit chip is defined as the DC-AC output controlling unit.

Abstract: A fluid transportation device includes a valve seat, a valve cap, a valve membrane, and an actuating module. The valve seat has an outlet channel and an inlet channel. The valve cap has a tilt structure. The valve membrane has an inlet valve structure and an outlet valve structure. The actuating module has a vibration film and an actuator. When the fluid transportation device is in a non-actuation status, a pressure cavity with a gradually-increasing depth is defined. When a voltage is applied on the actuator to result in deformation of the actuator, the vibration film generates a pressure difference to push the fluid. The fluid is introduced into the inlet valve structure through the inlet channel, guided by the tilt structure of the valve cap to be flowed from the pressure cavity to the outlet valve structure, and then flowed out of the outlet channel.