Abstract: A near-infrared condensing heating unit includes a frame having an open side at a side and a seat inside, and a reflecting plate disposed in the seat of the frame having an opening corresponding to the open side, and an extended semi-elliptic cross-section along an elliptic line. The near-infrared condensing heating unit further includes a lamp disposed inside the reflecting plate, with both ends mounted on the frame through sockets.

Abstract: A heat dissipation structure for an LED and an LED lighting lamp including the same are disclosed. The LED lighting lamp is constructed such that the heat generated by the LED module attached to the upper portion of the cylindrical body is rapidly dissipated to the outside in such a manner that the heat is transmitted to the radiating fins through the operational fluid, which flows to the upper portion through the fluid through space having flow paths therein, thereby remarkably improving heat dissipation efficiency.

Abstract: The present invention provides an apparatus and method for manufacturing a metal separator for a fuel cell, which can manufacture large-sized metal separators in large quantities using metal plates such as stainless steel by thermoplastic deformation using an incremental and synchronized rubber molding process.

Abstract: The present invention relates to a pyramidal kagome structure and more particularly, to a pyramidal kagome structure having a broaden contact area with a plate member and its fabricating method. According to the invention, a lattice mesh is formed with a plate so that continuous and mass-production is permitted and the produced pyramidal truss structures are assembled into a pyramidal kagome truss structure by combining the apexes of the pyramidal truss structures, whereby improved mechanical strength is obtained. Furthermore, the connecting of the pyramidal truss structures is facilitated due to the broadened contact area with the top and bottom plate member and an improved stability after combining is obtained.

Abstract: A near-infrared condensing heating unit includes a frame having an open side at a side and a seat inside, and a reflecting plate disposed in the seat of the frame having an opening corresponding to the open side, and an extended semi-elliptic cross-section along an elliptic line. The near-infrared condensing heating unit further includes a lamp disposed inside the reflecting plate, with both ends mounted on the frame through sockets.

Abstract: The present invention provides an apparatus and method for manufacturing a metal separator for a fuel cell, which can manufacture large-sized metal separators in large quantities using metal plates such as stainless steel by thermoplastic deformation using an incremental and synchronized rubber molding process.

Abstract: The present invention provides an apparatus and method for manufacturing a metal separator for a fuel cell, which can manufacture large-sized metal separators in large quantities using metal plates such as stainless steel by thermoplastic deformation using an incremental and synchronized rubber molding process.

Abstract: A dishwashing method of a dishwasher which includes a body, a dishwashing tub contained in the body, a steam generator received in the dishwashing tub to generate steam, a plurality of steam injection nozzles to inject the steam generated by the steam generator, a plurality of control valves to control flow of the steam into the respective steam injection nozzles, the method including injecting steam from a plurality of the steam injection nozzles comprising opening a plurality of the control valves, to maintain an injection pressure of the steam generated by the steam generator.

Abstract: The present invention provides an apparatus and method for manufacturing a metal separator for a fuel cell, which can manufacture large-sized metal separators in large quantities using metal plates such as stainless steel by thermoplastic deformation using an incremental and synchronized rubber molding process.

Abstract: The variable lamination rapid prototyping apparatus of the present invention includes a first feeding means which longitudinally reciprocates a sheet, a second feeding means which is provided under the first feeding means and reciprocates in a direction transverse to the sheet, and a rotating means which is coupled to the second feeding means and rotates around an axis parallel to the transverse direction of the sheet. The apparatus further includes a translation means which is linked to the rotating means, a cutting means which is coupled to the translation means, and a stacking means which subsequently stacks a plurality of cut sheets, thus forming the 3-dimensional object. The apparatus further includes a control means which previously stores data about the object therein and controls the above-mentioned plurality of means based on the data. Because a hot wire is provided in a parallelogram link structure, superior cutting accuracy and the stability are ensured.

Abstract: Disclosed herein is a hot tool which machines a workpiece made of foam material. The hot tool of the present invention includes a motor, a rotary unit which is coupled to the motor, and an electrode terminal which is connected to an outside power supply and contacts an electrode of the rotary unit. The hot tool further includes a heating body which is coupled to the rotary unit so that the heating body is heated by electric current supplied through the electrode terminal, with a spiral groove formed in a circumferential outer surface of the heating body. The hot tool further includes a polymer storage case which is provided at an upper position on the circumferential outer surface of the heating body, so that molten polymer that moves along the spiral groove is stored in the polymer storage case. Therefore, the hot tool of the present invention has increased machining accuracy and prevents a workshop from becoming messy due to molten polymer.

Abstract: The method for manufacturing large three-dimensional objects of the present invention comprises the following steps: obtaining a three-dimensional shape data for a three-dimensional target object; converting the three-dimensional shape data into a size needed for manufacturing; transforming the size-converted data into a “shell” data (i.e., data of a hallow target object having a cavity therein); dividing the “shell” data into shell segments of such a size that can be manufactured by a rapid prototyping apparatus; prototyping each of the “shell” segments by a rapid prototyping apparatus to manufacture each of prototyped parts; assembling the prototyped parts to produce a prototype of the target three-dimensional shape object.

Abstract: A method of manufacturing a lower panel for a plasma display panel using X-rays which includes preparing a base substrate; forming a barrier rib material layer on the base substrate; defining barrier rib patterns by scanning X-rays on the barrier rib material layer; and developing the barrier rib material layer to form barrier ribs. Fine-pitch patterning of the barrier ribs can be achieved with high precision by using X-rays.

Abstract: A method of manufacturing a soft mold to shape a barrier rib, a method of manufacturing a barrier rib and a lower panel, and a plasma display panel (PDP) including the same. The method of manufacturing the soft mold includes: providing a metal mold on which a barrier rib pattern is formed, by alternating channels and projections; disposing a polymer sheet opposite the metal mold; pressing the metal mold into the polymer sheet, to form the soft mold, which has an inverted image of the barrier rib pattern formed on the surface thereof; and releasing the soft mold from the metal mold.

Abstract: A method of manufacturing barrier ribs of a plasma display panel (PDP), and a method of manufacturing a lower panel for the PDP. The method of manufacturing the barrier ribs for the PDP includes: preparing a mold to shape the barrier ribs, which has a patterned surface; filling a plurality of channels formed in the mold with a barrier rib material, to form barrier ribs; and compression bonding a dielectric sheet to the barrier ribs in the mold. Using a molding process, a barrier rib pattern having a desired shape can be precisely formed, and an electrode burying layer with a uniform thickness can be obtained.

Abstract: A heating tool for shaping a soft material is provided. The heating tool is mounted to a predetermined position of a shaping apparatus and connected to a power source provided at a predetermined position of the shaping apparatus to melt and shape the soft material under a high temperature. The heating tool includes shaping parts which come in contact with the soft material to melt the soft material, and heating parts which are provided to be in non-contact with the soft material. The heating parts collect the molten soft material and thermally decompose the molten soft material. The heating tool enables a surface of the soft material to be perfectly thermally decomposed. Thus, the present invention prevents the soft material from being undesirably deformed, due to the molten material remaining after a shaping process.

Abstract: A steam/water mixed dishwasher using steam and water together, and, more particularly, a dishwasher and dishwashing method of achieving improvement in washing performance and efficiency via direct steam injection to dishes. The dishwasher includes a body containing a dishwashing tub, at least one dish basket disposed in the dishwashing tub and adapted to receive dishes therein, a steam generator to generate steam by heating wash water, and steam injection nozzles to inject the steam generated from the steam generator. The steam injection nozzles are disposed at the same height as a lower surface of the dish basket. The dishwashing method includes injecting steam from a number of the plurality of steam injection nozzles by opening a number of the plurality of control valves, to thereby maintain an injection pressure of the steam generated from the steam generator.

Abstract: A hexahedral finite element modeling method for controlling an element size, comprising the steps of: dividing a first face of a hexahedral finite element into four uniform sections, and dividing a second face diagonally opposite to the first face into sixteen uniform sections, thus modeling the hexahedral element into a face-refined transition unit mesh module; dividing a first edge of the hexahedral finite element having two meshed faces of the face-refined transition unit mesh module in common into two uniform sections, and dividing a second edge diagonally opposite to the first edge into four uniform sections, thus modeling the hexahedral element into a face-refined transition unit mesh module; and dividing each of three faces of the hexahedral finite element, having three meshed faces of the edge-refined transition unit mesh module in common and meeting each other at a first node, into four uniform sections, and partially dividing each of other three faces, meeting each other at a second node diagonally

Abstract: A rapid prototyping process and apparatus that provides an intermittent material feed type variable-lamination rapid prototyping using a linear thermal cutting system, wherein intermittently fed materials are cut to have variable lengths, widths, and lateral gradients with the 4-axis control-type linear thermal cutting system controlled by a computer, and based on cutting operation data generated in the computer.

Abstract: Disclosed herein is a variable lamination manufacturing process and apparatus. The method comprises the step of coating strip-shaped material with an adhesive while the strip-shaped material is fed. Thereafter, the strip-shaped material being fed is cut into material pieces of a variable width, variable inclinations and a variable length in accordance with the three-dimensional computer aided design data of a three-dimensional product using a linear heat source. The cut material pieces are stacked on a moving table to be positioned in the corresponding positions of the three-dimensional product. Finally, the stacked cut material pieces are pushed to bond one piece to anther.