Abstract: A die-casting method using a sintered material increases bonding strength between an insert and a casting portion. A die-cast product is manufactured using the die-casting method. The die-casting method includes an insert preparation step of preparing an insert having pores formed in a surface thereof by compacting iron-based powder and then sintering the compacted iron-based powder. The pores have a size of 100 ?m or more and are distributed over the surface of the insert and the insert has a density of 6.4 to 6.9 g/cm3 The method includes a die-casting step of placing the prepared insert inside a mold and injecting molten aluminum into the mold so as to perform casting while causing the molten aluminum to infiltrate into the pores formed in the surface of the insert.

Abstract: The present invention relates to a physical catchment model for a rainfall runoff experiment, characterized by being a physical catchment construction model having a structure in which a real terrain miniature is disposed at one side thereof and a developed terrain miniature is disposed at the adjacent other side thereof.

Abstract: An outer ring for a variable oil pump including 0.5 to 0.7% by weight of carbon (C), 2.9 to 3.8% by weight of nickel (Ni), 1.3 to 1.7% by weight of copper (Cu), 0.4 to 0.6% by weight molybdenum (Mo), and a remainder of iron (Fe) and unavoidable impurities, in which austenite occupies less than 15% of a total area, and a method of manufacturing the same are provided, and a method of manufacturing the same are provided.

Abstract: The present disclosure relates to an iron-based prealloy powder having excellent strength and processability, and an iron-based alloy powder for powder metallurgy and a sinter-forged member using the same. The iron-based prealloy powder for powder metallurgy according to an embodiment of the present disclosure includes 0.5 to 5.0 wt % of Cu, 0.1 to 0.5 wt % of Mo, and a balance of Fe and other inevitable impurities. A Cu content (Cu %) and a Mo content (Mo %) satisfy the following Relational Equation (1): 0.3×Cu %+3×Mo %?2.7??(1).

Abstract: A method of manufacturing an engine piston may include performing upper-body formation for forming an upper body as an upper portion of a piston body by pressing a powder-type sintered material, performing lower-body formation for forming a lower body as a lower portion of the piston body by pressing a powder-type sintered material, performing bonding for forming the piston body by providing a brazing material between the upper body and the lower body and brazing the upper body and the lower body to each other while sintering a sintered material, performing machining for removing pores from the surface of the piston body by machining the surface, and performing heat treatment for forming a passive film by performing at least one of nitriding heat treatment or oxidation heat treatment on the surface of the piston body.

Abstract: A method of manufacturing an engine piston may include performing upper-body formation for forming an upper body as an upper portion of a piston body by pressing a powder-type sintered material, performing lower-body formation for forming a lower body as a lower portion of the piston body by pressing a powder-type sintered material, performing bonding for forming the piston body by providing a brazing material between the upper body and the lower body and brazing the upper body and the lower body to each other while sintering a sintered material, performing machining for removing pores from the surface of the piston body by machining the surface, and performing heat treatment for forming a passive film by performing at least one of nitriding heat treatment or oxidation heat treatment on the surface of the piston body.

Abstract: A polypropylene composite resin composition includes: 30 to 70% by weight of high crystalline block copolymer polypropylene, based on the total weight of the polypropylene composite resin composition; 10 to 20% by weight of a rubber elastomer, based on the total weight of the polypropylene composite resin composition; 10 to 18% by weight of a reinforcing material, based on the total weight of the polypropylene composite resin composition; 2 to 4% by weight of a mercaptosilane coupling agent, based on the total weight of the polypropylene composite resin composition; and 1 to 5% by weight of a slip agent, based on the total weight of the polypropylene composite resin composition.

Abstract: A body-insertable device having an adjustable radiation emission direction and radiation emission range, which includes a first outer body extending to be long and an accommodation space having a first accommodation space and a second accommodation space having different distances to the first outer body.

Abstract: A method of manufacturing an engine piston may include performing upper-body formation for forming an upper body as an upper portion of a piston body by pressing a powder-type sintered material, performing lower-body formation for forming a lower body as a lower portion of the piston body by pressing a powder-type sintered material, performing bonding for forming the piston body by providing a brazing material between the upper body and the lower body and brazing the upper body and the lower body to each other while sintering a sintered material, performing machining for removing pores from the surface of the piston body by machining the surface, and performing heat treatment for forming a passive film by performing at least one of nitriding heat treatment or oxidation heat treatment on the surface of the piston body.

Abstract: A green compact of a sintered connecting rod is provided comprising a first end having a circular shape formed from a first powder, and connected to a crank shaft. A second end having a circular shape is formed from a second powder, and connected to a piston, wherein a diameter of the first end is larger than a diameter of the second end. A rod connects the first end and the second end.

Abstract: A thermoplastic polyurethane resin composition having enhanced texture and durability is capable of ensuring excellent appearance quality by applying polyester polyol including, polytetramethylene ether glycol and polydimethylsiloxane diol to an existing thermoplastic polyurethane resin composition, having excellent mechanical properties and long-term durability, such as anti-scratch and abrasion resistance, while largely enhancing texture quality, largely reducing producing costs by replacing a material such as natural leather, reducing generation of a volatile organic compound (VOC), and using the VOC in a surface material for a vehicle interior material.

Abstract: According to an aspect of the present disclosure, a polyolefine resin composition includes 1 to 20 parts by weight of one polyolefine resin having a first melt index; 1 to 20 parts by weight of another polyolefine resin having a second melt index different from the first melt index; 60 to 85 parts by weight of an inorganic filler; and 5 to 20 parts by weight of a fluorine-acrylic copolymer-based compound.

Abstract: Compositions of high-rigid polypropylene composite resin are provided herein. Such compositions having excellent tactile sensation and dimensional stability, and more particularly, the compositions of polypropylene composite resin having excellent tactile sensation such as thermoplastic rubber, excellent impact strength and rigidity, and low shrinkage anisotropy. The compositions of polypropylene composite resin provided herein also have excellent impact strength and rigidity as well as excellent tactile sensation such as a thermoplastic rubber and low shrinkage anisotropy. Thus, they exhibit excellent moldability and the compositions can be molded into a vehicle component. Furthermore, the compositions of polypropylene composite resin have excellent tactile sensation and can be used as a high-quality material that does not require separate painting and maintains excellent physical properties and dimensional stability as a vehicle component.

Abstract: A polypropylene composite resin composition with fiber texture includes a polypropylene resin including homo-polypropylene, a first ethylene-propylene copolymer, a second ethylene-propylene copolymer or a combination thereof, and an ethylene/?-olefin copolymer, and a molded article manufactured using the same.

Abstract: The present invention provides a glass wool cutting device. The device includes a cutting section housing that has a cutting section chamber, a feed port that is connected to the cutting section chamber, and a discharge port that is connected to the cutting section chamber. A stationary knife is disposed on the cutting section housing to protrude into the cutting section chamber and a movable cutter that has a rotary support body is disposed in the cutting section chamber and a movable knife is supported on the rotary support body to apply a shearing force to the glass wool together with the stationary knife. Additionally, a cutter actuator provides a driving force to the rotary support body.

Abstract: A supercritical CO2 generation system using plural heat sources, includes: a pump configured to circulate a working fluid; heat exchangers configured to heat the working fluid using an external heat source; turbines configured to be driven by the working fluid heated by passing through the heat exchanger; and recuperators configured to exchange heat between the working fluid passing through the turbine and the working fluid passing through the pump to cool the working fluid passing through the turbine, in which the heat exchanger includes constrained heat exchangers having an emission regulation condition of an outlet end and heat exchangers without the emission regulation condition.

Abstract: Disclosed herein is a hybrid power generation system. The hybrid power generation system may enhance efficiency of production of electricity and heating heat by integrating power generation using supercritical carbon dioxide (CO2) and cogeneration.

Abstract: A polypropylene composite resin composition includes: 30 to 70% by weight of high crystalline block copolymer polypropylene, based on the total weight of the polypropylene composite resin composition; 10 to 20% by weight of a rubber elastomer, based on the total weight of the polypropylene composite resin composition; 10 to 18% by weight of a reinforcing material, based on the total weight of the polypropylene composite resin composition; 2 to 4% by weight of a mercaptosilane coupling agent, based on the total weight of the polypropylene composite resin composition; and 1 to 5% by weight of a slip agent, based on the total weight of the polypropylene composite resin composition.

Abstract: A method for manufacturing a lighting button key is provided. The method includes forming a button body by processing a metal plate, attaching a thin film to the button body and performing double etching on a rear surface of the button body to process a symbol pattern. Additionally, the method includes press-forming the rear surface of the button body and an injection material of a transparent or translucent material into the rear surface of the button body to perform injection molding.

Abstract: A piston pin has an eccentric center of gravity and formed of different materials and is installed through a piston and an upper end of a connecting rod. The piston pin includes a cylindrical outer member and a cylindrical inner member formed of a material which has a lower density than the outer member and is arranged in the outer member.