Abstract: The present invention provides a method for reducing a drawing force in a forming process of a photocurable material by adding a radical scavenger capable of terminating free radical polymerization into a substrate for carrying the photocurable material. The method comprises: providing a mold release composition at least comprising a radical scavenger and a molding agent; and forming a mold release film from the mold release composition by curing forming or by combining with an upper surface of a plate, thereby preparing the substrate. In this way, during the light curing reaction of the photocurable material by irradiation with a light source, the radical scavenger in the upper surface of the substrate contacting with the photocurable material can react with free radicals in the photocurable material, such that the photocurable material forms an uncured layer for which light curing does not occur on the upper surface of the substrate.

Abstract: The present invention provides a method for reducing a drawing force in a forming process of a photocurable material by adding a radical scavenger capable of terminating free radical polymerization into a substrate for carrying the photocurable material. The method comprises: providing a mold release composition at least comprising a radical scavenger and a molding agent; and forming a mold release film from the mold release composition by curing forming or by combining with an upper surface of a plate, thereby preparing the substrate. In this way, during the light curing reaction of the photocurable material by irradiation with a light source, the radical scavenger in the upper surface of the substrate contacting with the photocurable material can re act with free radicals in the photocurable material, such that the photocurable material forms an uncured layer for which light curing does not occur on the upper surface of the substrate.

Abstract: This invention relates to a fireproofing article and the method of manufacturing the same. The fireproofing article comprises an external portion and an inner portion. The external portion defines external surfaces of the fireproofing article that are exposed to the environment. The inner portion is formed inside of the external portion. The external portion and the inner portion are both porous and made of a fireproofing material. The external portion has a first material density and the inner portion has a second material density. The first material density is less than the second material density. The method of manufacturing a fireproofing article comprises forming the fireproofing article with a fireproofing material through 3D printing; wherein the fireproofing article formed is porous.

Abstract: A direct dyeing type color fused deposition modeling three-dimensional printing apparatus includes a forming stage, a forming unit, and a color-inkjet unit. The forming unit is located above the forming stage for providing forming-material layers on the forming stage in sequence. The color-inkjet unit is located above the forming stage for providing color-ink layers on the forming-material layers in sequence, wherein the forming-material layers and the color-ink layers are stacked alternately in sequence to form a colored three-dimensional object. A direct dyeing type color fused deposition modeling three-dimensional printing method is also provided.

Abstract: A printable biodegradable polymer composite includes PGSA, a biodegradable photo-initiator and material selected from the group consisting PCL-DA and PEG-DA uniformly blended together. By adjusting the blending ratio, the elasticity, mechanical properties and degradation patterns may be adjusted for producing a tissue, organ or related bio-product by 3D-printing.

Abstract: The present disclosure provides a dispensing device and a 3-D printing apparatus including the same. The dispensing device comprises a main body with a main body heater, a head portion and a heating device. The main body includes a passage with a longitudinal axis and the main body heater is used for heating the material in at least a section of the passage to a flowable condition. The head portion is connected to an end of the passage and communicates with the passage and further includes an outlet for discharging the heated material. The heating device includes a peripheral path surrounding the head portion and heats a region surrounded by the peripheral path.

Abstract: A printable biodegradable polymer composite comprises PGSA, biodegradable photo-initiator and material selected from the group consisting PCL-DA and PEG-DA being uniformly blended together. By adjusting blending ratio of the present invention, the elasticity, mechanical properties and degradation patterns of the present invention may be adjusted for producing various tissue, organ or related bio-product by 3D-printing.

Abstract: A photo-sodification modeling apparatus is provided. The apparatus comprises: a container, a holding plate, a lifting mechanism, a light source module, and a control unit. The container provides an accommodation space for accommodating a light-curable material, and includes: a base plate and a wall structure. The base plate is transparent or translucent. The wall structure is disposed around the base plate. The lifting mechanism is used for moving the holding plate. The light source module is disposed under the container. During formation of a solidified layer of a three-dimensional object, the base plate provides an electric or magnetic field so that the light-curable material in the container will not solidify on a surface of the base plate, thus resulting in the solidified layer having a reduced viscosity when the solidified layer is closer to the surface of the base plate.

Abstract: A 3D printing device and a method for 3D printing are provided. The 3D printing device comprises a first printing head and a second printing head. The first printing head is used to print a desired article with a first material. The second printing head is used to print support structures for supporting the desired article during printing with a second material. The method comprises the following steps: printing a desired article with a first material; printing support structures for supporting the desired article during printing with a second material; and detaching the desired article from the support structures. The first material has a first surface cooling time of the temperature drop from 170° C. to 70° C., the second material has a second surface cooling time of the temperature drop from 170° C. to 70° C., and the second surface cooling time is less than the first surface cooling time by at least 15 seconds.

Abstract: This invention relates to a fireproofing article and the method of manufacturing the same. The fireproofing article comprises an external portion and an inner portion. The external portion defines external surfaces of the fireproofing article that are exposed to the environment. The inner portion is formed inside of the external portion. The external portion and the inner portion are both porous and made of a fireproofing material. The external portion has a first material density and the inner portion has a second material density. The first material density is less than the second material density. The method of manufacturing a fireproofing article comprises forming the fireproofing article with a fireproofing material through 3D printing; wherein the fireproofing article formed is porous.

Abstract: A color three-dimensional (3D) printing apparatus configured for forming a colored 3D object is provided. The color 3D printing apparatus includes a stage, a first printing unit, a second printing unit, a color inkjet printing unit, and a curing unit. The first printing unit is configured for providing the stage with a first material. The second printing unit is configured for providing the stage with a second material, and a gap remains between the first material and the second material. The color inkjet printing unit is configured for providing the gap with a colored pigment. The curing unit is configured for curing the colored pigment to form the colored 3D object, and the colored 3D object is composed of a plurality of colored object units stacked together. A color 3D printing method is also provided.

Abstract: The present disclosure provides a dispensing device and a 3-D printing apparatus including the same. The dispensing device comprises a main body with a main body heater, a head portion and a heating device. The main body includes a passage with a longitudinal axis and the main body heater is used for heating the material in at least a section of the passage to a flowable condition. The head portion is connected to an end of the passage and communicates with the passage and further includes an outlet for discharging the heated material. The heating device includes a peripheral path surrounding the head portion and heats a region surrounded by the peripheral path.

Abstract: A direct dyeing type color fused deposition modeling three-dimensional printing apparatus includes a forming stage, a forming unit, and a color-inkjet unit. The forming unit is located above the forming stage for providing forming-material layers on the forming stage in sequence. The color-inkjet unit is located above the forming stage for providing color-ink layers on the forming-material layers in sequence, wherein the forming-material layers and the color-ink layers are stacked alternately in sequence to form a colored three-dimensional object. A direct dyeing type color fused deposition modeling three-dimensional printing method is also provided.

Abstract: A photo-sodification modeling apparatus is provided. The apparatus comprises: a container, a holding plate, a lifting mechanism, a light source module, and a control unit. The container provides an accommodation space for accommodating a light-curable material, and includes: a base plate and a wall structure. The base plate is transparent or translucent. The wall structure is disposed around the base plate. The lifting mechanism is used for moving the holding plate. The light source module is disposed under the container. During formation of a solidified layer of a three-dimensional object, the base plate provides an electric or magnetic field so that the light-curable material in the container will not solidify on a surface of the base plate, thus resulting in the solidified layer having a reduced viscosity when the solidified layer is closer to the surface of the base plate.

Abstract: A color three-dimensional (3D) printing apparatus configured for forming a colored 3D object is provided. The color 3D printing apparatus includes a stage, a first printing unit, a second printing unit, a color inkjet printing unit, and a curing unit. The first printing unit is configured for providing the stage with a first material. The second printing unit is configured for providing the stage with a second material, and a gap remains between the first material and the second material. The color inkjet printing unit is configured for providing the gap with a colored pigment. The curing unit is configured for curing the colored pigment to form the colored 3D object, and the colored 3D object is composed of a plurality of colored object units stacked together. A color 3D printing method is also provided.

Abstract: An automatic handle assembly for scissors-shearing is a handy device for fixing a scissors to cut tissue, which comprises: a fixture portion including: a fix scissor handle having a proximal end and a distal end, the proximal end equipped with a fix tenon and the distal end equipped with a connection portion; a free scissor handle having a distal end and a proximal end coupled to the fix tenon causing the distal end of the free scissor handle and the distal end of the fix scissor handle to pivot to close or open; and a pair of fixture elements being mounted on the fix scissor handle and the free scissor handle, and slidably moving along with the fix scissor handle and the free scissor handle for adjustably fixing a scissors; a drive unit coupled to the fixture portion to provide reciprocating motion of the free scissor handle to the fix scissor handle; and a power unit being removably equipped on the distal end of the fix scissor handle, and coupled to the drive unit to provide power for the reciprocating mot

Abstract: A method for fabricating sub-millimeter sized parts uses electrodes created from patterned silicon wafers for electric-discharge machining (EDM), in which an electric discharge is generated between a patterned electrode and a conductive workpiece. Workpiece material corresponding to the electrode pattern is removed by electroerosion, and the remaining workpiece contains the desired part. Electrodes are formed by etching stepped patterns in silicon wafers and depositing a thin metallic layer on the wafer. The resulting electrode is used in an EDM machine, and an inverse pattern is produced in the part. Alternately, the silicon wafer pattern is filled by a metal to produce a metal electrode with an inverse pattern. The wafer is removed from the metal, and the metal is used in an EDM machine. The resulting part has the same pattern as the silicon wafer used to create the metal electrode.

Abstract: Micro-Mold Shape Deposition Manufacturing (&mgr;-Mold SDM) is a method for fabricating complex, three-dimensional microstructures from layered silicon molds. Silicon wafers are etched using conventional silicon-processing techniques to produce wafers with surface patterns, some of which contain through-etched regions. The wafers are then stacked and bonded together to form a mold, which is filled with part material. In one embodiment, the part material is a ceramic or metallic gelcasting slurry that is poured into the mold and solidified to form a part precursor. The mold is removed, and the precursor is sintered to form the final part. The gelcasting material may also be a polymer or magnetic slurry, in which case sintering is not needed. The mold can also be filled by electroplating a metal into it; if necessary, each layer is filled with metal after being bonded to a previously filled layer.