Abstract: A three-dimensional printing device including a body, a tank, an origin target, a sensor, and a control module is provided. The tank is rotatably assembled on the body, and the tank is filled with a liquid forming material. The origin target is disposed on the tank and rotates along with the tank. The sensor is disposed on the body and located above the liquid forming material to sense a liquid level of the liquid forming material. The control module electrically connects the tank and the sensor and drives the tank to rotate. The sensor is located above a rotation path of the origin target, and the control module senses the origin target through the sensor and positions a rotation origin of the tank.

Abstract: An apparatus for producing 3D point-cloud model of physical objects includes a rotatable platform (11), multiple patterns asymmetrically arranged on the rotatable platform (11), a background curtain (13), and an image capturing unit (12) arranged facing toward the background curtain (13). A producing method includes: placing an object (2) to be scanned on the rotatable platform (11); setting a capturing amount during one-time rotation operation; controlling the rotatable platform (11) to perform the rotation operation, and controlling the image capturing unit (12) to capture corresponding images during the rotation operation according to the capturing amount, wherein each image includes the entire object (2) and multiple of the patterns, and records corresponding global coordinates; and, performing matching on multiple features of each of the images, and constructing a 3D point-cloud model of the object (2) according to a matching result of the features and the global coordinates of each of the images.

Abstract: The invention provides a method for height difference measurement between the print heads and a 3D printer using the method. The 3D printer includes a printing module, a contact sensor, a movement sensor and a controller. The controller makes a 3D print head and the contact sensor contact to each other vertically for generating a contact signal, and obtains a first height value according to a vertical movement distance between the printing module and the contact sensor. The controller makes a color head and the contact sensor contact to each other vertically for generating the contact signal, and obtains a second height value according to a vertical movement distance between the printing module and the contact sensor. The controller obtains a height difference between the 3D print head and the color head according to the first height value and the second height value.

Abstract: A 3D printing method including: obtaining a wavelength-absorptivity relationship of a liquid forming material, where the wavelength-absorptivity relationship includes absorptivity peaks of at least two corresponding wavelengths; forming a 3D object by using a 3D printing apparatus, where the 3D printing apparatus provides a first light to cure the liquid forming material layer-by-layer and stacks the same to form the 3D object, and a wavelength of the first light is one of the at least two corresponding wavelengths; and providing a second light by a post curing device to irradiate the 3D object, where the second light comprises the at least two corresponding wavelengths.

Abstract: A method for three dimensional (3D) printing and a 3D printing device are provided. The 3D printing device includes a modeling printing head, a coloring printing head, and a platform. The modeling printing head and the coloring printing head are co-constructed. The three dimensional printing method includes: printing a forming layer and at least one material barrier outside a bounding area of the forming layer; calculating multiple coloring routes of the coloring printing head according to an edge of the forming layer; converting the coloring routes of the coloring printing head into multiple color-passing routes of the modeling printing head; calculating multiple detour routes of the modeling printing head according to the color-passing routes of the modeling printing head.

Abstract: A 3D printing method adapted for a 3D printer is provided. The 3D printer includes a tank filled with a liquid-state forming material, a platform, a curing module and a control module. At least one of the tank and the platform as well as the curing module are electrically connected to the control module to be controlled by the same, and a 3D object is formed on the platform. The 3D printing method includes analyzing a model of the 3D object to obtain a layered information; the control module correspondingly distributes the layered information at a plurality of forming positions at the bottom of the tank. A forming layer is cured by the curing module and located at a forming position, and then the platform and the tank rotate relatively to move the forming layer to another forming position, and another forming layer is formed at the another forming position.

Abstract: A 3D printer including a machine platform, a container, at least one stirring element and a driving module is provided. The container is assembled to the machine platform and is adapted to contain a liquid forming material. The stirring element has a rotating shaft and is adapted to rotate along the rotating shaft. The driving module is connected to at least one of the container and the at least one stirring element, so as to drive the container and the at least one stirring element to produce relative movement when 3D printing is not performed, and the liquid forming material in the container is stirred by the at least one stirring element.

Abstract: A three-dimensional printing apparatus including a body, a rotation module, a tank, an elevating module, a forming platform, a curing module, and a control module is provided. The rotation module and the elevating module are disposed on the body. The tank is disposed on the rotation module. The forming platform is disposed on the elevating module. The curing module disposed in the body and under the tank. The control module is electrically connected to the rotation module, the elevating module, and the curing module. The forming platform dips into the forming material in liquid in the tank and the curing module cures the forming material between the forming platform and an inner bottom of the tank to form a solidification layer. Then the elevating module and the rotation module respectively drive the forming platform to rise and rotate relatively to the tank simultaneously.

Abstract: A 3D printing apparatus including a forming assembly, a scraping tool, a first collection tank, a sweeping tool and a second collection tank is provided. A roller of the forming assembly is adhered with a forming material during a forming process. When the roller is rotated, the scraping tool removes the forming material adhered on the surface of the roller. The scraping tool is disposed between the first collection tank and the roller. The forming material removed from the surface of the roller is guided into the first collection tank. The sweeping tool is configured to sweep the forming material in the first collection tank to a position of the first collection tank. The second collection tank is connected to the position of the first collection tank to receive the forming material swept to the position by the sweeping tool.

Abstract: The invention relates to a 3-D printing apparatus including a tank, a platform, a fixture, a solidifying module and a control module. The tank is flexible and filled with a liquid-state forming material. The platform is disposed in the tank. The control module drives the fixture to deform the tank, so as to form a first gap between the platform and a bottom of the tank for the liquid-state forming material to flow in. The solidifying module in controlled by the control module to solidify the liquid-state forming material between the platform and the bottom of the tank, so as to form a solidified layer. The invention can effectively reduce a processing time for manufacturing each solidified layer, such that an overall processing time can be reduced to achieve preferable molding efficiency.

Abstract: A three dimensional printing apparatus is provided, and the three dimensional printing apparatus includes a modeling portion, a powder supplying portion, a powder spreading mechanism, a printing mechanism and a controller. The powder supplying portion is filled with a powder forming material. The powder spreading mechanism is disposed on a first side of the modeling portion, and is configured to transfer the powder forming material from the powder supplying portion to spread the powder forming material on the supporting platform. The printing mechanism is disposed on a second side of the modeling portion which is opposite to the first side, and is configured to eject the glue material. The controller operates in a fast mode according to a fast mode instruction, so as to control the printing mechanism to eject the glue material onto the powder forming material while moving along a first direction with the powder spreading mechanism.

Abstract: A stereolithography color 3D printing method applied to a stereolithography color 3D printer (1) having a light module (11), a coloring module (12) and a curing platform (17) is provided. The method is to lower the curing platform (17) a default height (h), operate the light module (11) to irradiate stereolithography materials (180) on the curing platform (17) for curing the stereolithography materials (180) and manufacturing one layer of slice physical model (182, 30, 31) according to one layer of object print data, operate the coloring module (12) to color the slice physical model (182, 30, 31), and perform above-mentioned operations repeatedly until a color 3D physical model has been manufactured. Therefore, better printing performance can be achieved and colored 3D physical model with high definition can be manufactured by combining the stereolithography technology with the auto-coloring technology.

Abstract: A three-dimensional printing apparatus and a three-dimensional printing method are provided. The method includes following step. An extending path associated with a first feeding path is obtained according to a feeding endpoint and at least one feeding point of the first feeding path. A printing head is controlled to move along the first feeding path according to a printing speed and to feed a forming material. The printing head is controlled to move along the extending path to an extending point according to a first speed, and to stop feeding the forming material, wherein the first speed is less than the printing speed. The printing head is controlled to move along a direction away from the extending point according to a second speed, wherein the second speed is greater than the printing speed.

Abstract: A method for printing colored 3D object adopted by a 3D printer (1) comprising a 3D nozzle (3) and a 2D nozzle (4) is disclosed. The method comprises following steps of: inputting a 3D file corresponding to a 3D colored model (5); reading coordinate information and color information of the 3D colored model (5); executing a 3D route slicing process and a 2D image slicing process for respectively generating a route file (6) and an image file (7) for each of a plurality of printing layers; controlling the 3D nozzle (3) to print each slicing object according to each route file (6) of each printing layer; and, controlling the 2D nozzle (4) to color each printed slicing object according to each image file (7) of same printing layer.

Abstract: A printing material for a three-dimensional (3D) printing apparatus is provided. The printing material includes a core and a shell covering the core, wherein the Shore hardness of the core is A45-A90, the Shore hardness of the shell is D40-D85, the Shore hardness of the shell is higher than the Shore hardness of the core, the volume percentage of the shell is 10% to 30%, and the volume percentage of the core is 70% to 90%. Since the printing material has a specific structure, feed abnormality during the printing material passing through a narrow inlet hole and guide tube may be prevented in the use of low-hardness material as the core.

Abstract: A method for compensating coloring range of colored 3D object is disclosed. The method includes following steps: importing a 3D object; performing an object slicing process to the 3D object for generating multiple object printing-route information for multiple printing layers; performing an image slicing process to the 3D object for generating multiple color printing-route information for the multiple printing layers; performing an extension process to the color printing-route information for generating updated color printing-route information, the updated color printing-route information may cover extension blocks respectively generated from each sliced object after the sliced object is printed.

Abstract: The invention provides a heating head for a three-dimensional printing pen. The heating head includes a heating pipe, a heating member, a heat insulation pipe, a heat insulation sleeve, and a heat sink. The heating member is disposed on the heating pipe. The heat insulation pipe penetrates into the heating pipe. The heat insulation sleeve is sleeved on the heating pipe and opposite to the heating member. The heat insulation sleeve partly covers the heat insulation pipe, and the heat insulation pipe and the heat insulation sleeve are separated by the heating pipe. The heat sink and the heat insulation sleeve mutually lean against, wherein the heat insulation sleeve is located between the heating member and the heat sink, and the heat insulation pipe penetrates into the heat sink.

Abstract: A quick release print head includes a heating block, a nozzle tube and a connecting tube. The nozzle tube is inserted in the heating block. One end of the nozzle tube has a nozzle and the other end is extended with an extension tube exposed to the heating block. The connecting tube is connected with the extension tube. Whereby, the extension tube extended from the nozzle tune is exposed to the heating block so that the nozzle tube disposed near the heating block cannot be disassembled. Thus, a process of replacing components by heating a nozzle can be bypassed, and advantages of quick disassembly and easy maintenance of the print head can be achieved.

Abstract: A 3D printer including a machine platform, a container, at least one stirring element and a driving element is provided. The container contains a liquid forming material, and is movably assembled to the machine platform. The stirring element is disposed in the container to move along with the container, and has a motion mode of moving away from or moving close to a bottom of the container. The driving element is fixed on the machine platform and extends into the container. The driving element and the stirring element are mutually located on moving paths of each other. During a moving process of the container, the driving element and the stirring element lean against each other to trigger the motion mode of the stirring element to move away from or move close to the bottom of the container, so as to stir the liquid forming material in the container.

Abstract: A three-dimensional printing method for a three-dimensional printer is provided. The three-dimensional printer includes a model printing head, a color printing head, and a platform. The model printing head prints a forming layer on an X-Y plane of the platform. The model printing head and the color printing head are arranged along an X-axis and co-constructed. The three-dimensional printing method includes: providing information of the forming layer and a coloring zone thereof; driving the model printing head by a processor to print the forming layer and at least one material barrier outside the forming layer; and after printing the forming layer and the material barrier, driving the color printing head by the processor to color the coloring zone along a Y-axis, such that the material barrier is located on a moving path of the model printing head during the coloring.