National Taiwan University

Other

Chang Gung Memorial Hospital, Linkou

Jeng-Ywan Jeng

Ajeet Kumar

Bing-joe Hwang

Wei-nien Su

Yih-Lin Cheng

Tse-Ming Chiu

Yuan-Han Chu

Hsin-Fu Teng

Yu-Deh Chao

Rimma Shafikova

Mohammad Hossein Goudarzi Khouygani

Ya-Ting Chang

Ding-Zheng Lin

Tzung-Han Lin

Chorng-Shyan Chern

Chang-Ho Shen

Freeman Chen

Chyan-Chyi Wu

Ping-Hsun Tsai

Ming-Hua Ho

Shang-Chih Lin

Jia-Chang Wang

Chinmai Bhat

Ping-Hung Yu

Yu-Cheng Chen

Shu-Cheng Liu

Fu-Lin Chen

Han-Hsuan Lee

Pin-Cheng Wang

Cheng-Che Lu

Chi-Pin Hsu

Alvin Chao-Yu Chen

Chin-Ju Wu

Aamer Nazir

Zhen-You Chen

Fu-Teng Jhang

Yi-Sheng Chan

Dong-Quan Yeh

Ding-Shyan Chen

Sarjono Tri

Saurav Verma

Yeabsra Mekdim Hailu

Yi-Jane Chen

Meng-Jyun Lin

Yun-Peng Yeh

The present invention provides a polymer composite particle material for three-dimensional printing. The polymer composite particle material is formed by embedding a carbon powder on a surface of a polymer powder. When the carbon powder is mixed with the polymer powder, a device with a shear force is used for stirring. Heating is performed during the stirring, such that melting occurs at the surface of the polymer powder. The carbon powder is embedded on the surface of the polymer powder to form a shell-core structure powder, and at the same time, the carbon powder is uniformly coated. The preparation method is simple and no additional dispersant and binder are needed. Besides the carbon powder will not easily separate from the polymer powder. At the same time, the agglomerated carbon powder can be dispersed by rubbing and evenly dispersed around the polymer powder to reduce a laser reflectivity.

Preparation method for polymer composite particle material, and three-dimensional printing method by using polymer composite particle material

A method of orthopedic treatment includes steps of: by using a computer aided design (CAD) tool based on profile data that is related to a to-be-treated part of a bone of a patient, obtaining a model of a preliminary instrument that substantially fits the to-be-treated part; by using the CAD tool, obtaining a model of a patient specific instrument (PSI) based on the model of the preliminary instrument; producing the PSI based on the model of the PSI, the PSI being adjustable; performing medical operation on the to-be-treated part, and then attaching the PSI to the to-be-treated part; after attaching the PSI to the to-be-treated part, adjusting the PSI such that the PSI is adapted to real conditions of the to-be-treated part.

Method of orthopedic treatment

The metallic crystal structures inspired edge-to-edge tessellations and a tessellation based lattice structures are disclosed. In accordance with an exemplary embodiment of the invention, basic unit lattice cells are stacked and connected to constitute a three-dimensional tessellations, wherein each of the basic unit lattice cells comprises a multiple flat connecting portions formed on a surface of the basic unit lattice cell and intersecting with a multiple of axes intersecting in a center of the basic unit lattice cell, and the flat connecting portions of one of the basic unit lattice cell is connected to the flat connecting portions of the adjacent basic unit lattice cell to constitute a connection structure of edge-to-edge tessellation. The formed tessellations are periodically tessellated in a design domain to form different tessellated lattice structures. The Functionally Tessellated (FT) lattice structures composed of different tessellations by interlocking into each other are also disclosed.

Crystal structures inspired tessellations to generate multi-material properties in lattice structures with 3D printing

A large area deposition type additive manufacturing equipment is disclosed. The large area deposition type additive manufacturing equipment includes a light source module, a dynamic photomask module, a raw material tank and a deposition module. The light source module includes a plurality of light emitting members, a light diffusion member, a light enhancement member and a light emitting angle limiter. Light emitted from the light emitting members passes through the light diffusion member, the light enhancement member and the light emitting angle limiter to become a collimated curing light. The collimated curing light travels through a transparent member of the raw material tank and a dynamic photomask module to reach liquid photocurable material in the raw material tank, thereby curing the liquid photocurable material. The angle of emitted light ranges within ±30° with respect to a normal line of an incident plane of the light source module.

Deposition additive manufacturing equipment

The invention provides a composite particle material for selective laser sintering (SLS), which is composed of an inorganic powder coated with a binder. The composite particulate material is formed by mixing the inorganic powder and the binder to have the binder directly coated on the outer surface of the inorganic powder. In addition, the inorganic powder to be coated by the binder is preferably using a powder having a smaller particle size and a larger particle size distribution, and thereby the production cost can be greatly reduced. Further, since the outer surface of the inorganic powder is coated with the binder, there are no problems such as causing oxidation of the inorganic powder and so on. Furthermore, manufacturing the composite particle material can be easily carried out in a general ambient or an atmospheric environment, and the powder material after use is recyclable.

Composite particle material for selective laser sintering, preparation method thereof, and three-dimensional printing method for high-density green body by using the same

The present invention provides a bottom plate of a resin tank for three-dimensional printing, which is manufactured through the following steps: substrate surface roughening step: treating the upper surface of a transparent substrate by using a plasma, or disposing a composite film on the upper surface of the transparent substrate to form a non-smooth surface structure having pores; substrate surface modification step: sequentially performing an activation treatment and a fluorination treatment on the upper surface of the transparent substrate; and stabilizer filling step: applying a stabilizer to the upper surface of the transparent substrate to fill the stabilizer penetrates into the pores on the upper surface of the transparent substrate. The low surface energy film reduces the adhesion of the hardened photosensitive material, and the stabilizer maintains the structure of the low surface energy film, so that the resin tank bottom plate has both oleophobic and hydrophobic properties.

Bottom plate of resin tank for three-dimensional printing

The present invention provides a method for 3D inkjet printing, which comprises: a preheating step: an external heating source is used to heat a main body layer composed of a first composition to a first temperature, wherein the main body layer has a thickness of 10 &#x3bc;m to 500 &#x3bc;m and a unit density of 0.1 to 1.0 g/cm, and the first temperature is less than the melting point of the first composition; a heating step: a second composition is applied to the surface of the first composition at the first temperature of the composite to proceed an exothermic cross-linking polymerization, so that the main body layer is heated to a second temperature to become a molten state; and a cooling step: the main body layer in the molten state is cooled down and solidified to form.

3D printing set and method for 3D inkjet printing by using the same

A invention disclosed a bio-mimicked three-dimensional laminated structure at least comprising a flexible lattice structure, which is characterized in that the flexible lattice structure comprises a plurality of particle units are uniformly disposed and evenly distributed in the X-axis, the Y-axis, and the Z-axis direction and evenly distributed as a lattice matrix of an array grid in an identical plane; wherein each of the particle units is an opened hollow shell or a close shell. The design eliminates the need for support structures and the subsequent post-processing required to remove them. A shell-shaped close cell bio-mimicked three-dimensional laminated structure bio-mimicking a sea urchin shape was introduced for the load-bearing structure application.

Bio-mimicked three-dimensional laminated structure

The proposed lattice structure is designed to simplify the time of long and difficult post-printing process of removing the unused powder or resin by blowing air in the additive manufacturing parts. The designed lattice structure is a ventilated three dimensional structure that includes a plurality of lattice bodies arranged in a first direction, a second direction and a third direction. The first direction, the second direction and the third direction are orthogonal. Each of the lattice body has a hollow structure formed by a shell wall including a first venting hole opening in the first direction and facing the first venting hole of another adjacent lattice body, a second venting hole opening in the second direction and facing the second venting hole of another adjacent lattice body; and a third venting hole opening in the third direction and facing the third venting hole of another adjacent lattice body.

Ventilated three dimensional structure from additive manufacture for easy powder removal during post process

A smart faucet equipment providing water for washing and sanitizing liquid for dry hand wash. A user may activate different sensors to provide different liquid according to their requirement. The smart faucet equipment of the invention provides water or sanitizing liquid according to the sensors activated by the user. The smart faucet equipment of the invention provides control scheme of regulation of the time period for providing water or sanitizing liquid according to the user's requirement, whereby the user may wash his/her hands without manual operation.

Smart water faucet with far-UV disinfection and automatic soap and sanitizer dispenser

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.

Method for reducing drawing force in forming process of photocurable material

The present invention relates to a shoe midsole structure and a method for manufacturing the same. The shoe midsole has unique hollow particle units that may be additively manufactured without any support structure. Each of the hollow particle units has a specific thickness and a hollow interior. A housing layer of each of the hollow particle units has a plurality of openings, a plurality of planar annular portions surrounding each of the openings, and a plurality of curved portions connecting adjacent planar annular portions. The plurality of openings are disposed in pair on the housing layer symmetrically with respect to the geometric centroid of the hollow particle units. A plurality of hollow particle units are arranged into a multi-laminate structure in the shoe midsole. Some hollow particle units are bent when a compression force or a shearing force is applied during use.

Shoe midsole structure and method for manufacturing same

An apparatus for cutting a substrate is disclosed. The apparatus includes a main body containing a reactive solution and the substrate; and a catalytic cutting element disposed inside the main body and contacting one of at least two adjacent cutting peripheries of the substrate to conduct a chemical reaction to cut the substrate.

Apparatus for cutting substrate and system for processing same

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.

Photo-sodification modeling apparatus and method

An optical device for measuring a distance includes a prism, a beam splitter, a detector and a light source. The prism has a first light-incident surface and a plurality of first light-transmitting surfaces. The first light-incident surface is opposite to the first light-transmitting surfaces. The first light-transmitting surfaces intersect at a vertex. The beam splitter has a light-passing surface, a second light-incident surface and a second light-transmitting surface. The second light-incident surface faces the first light-transmitting surfaces. The light-passing surface is opposite to the second light-incident surface. The beam splitter includes a partially mirror surface facing the light-passing surface and the second light-incident surface. The light-passing surface faces a grating. The detector corresponds to the second light-transmitting surface. The light source emits a light beam to the first light-incident surface. An optical axis of the light beam passes through the vertex and the beam splitter.

Optical device

Growing community of inventors

Taipei, Taiwan

Jeng-Ywan Jeng