Abstract: A method of manufacturing a door hinge, which can improve productivity by applying both metal injection molding and additive manufacturing is disclosed. The method includes: preparing a first mixture of a first metal powder and a first binder, and a second mixture of a second metal powder and a second binder; molding the first mixture into a first body including a first connection member having a first pinhole; molding the first mixture into a second body including a second connection member having a second pinhole to communicate with the first pinhole; arranging the first body and the second body to align the first pinhole and the second pinhole along an axis to form a cavity; forming a pin member with the second mixture in the cavity by adding up droplets of the second mixture in the cavity; and sintering the first body, the second body, and the pin member.

Abstract: A method of manufacturing a door hinge, which can improve productivity by applying both metal injection molding and additive manufacturing is disclosed. The door hinge includes: a first body configured to include at least one first connection member in which a first pinhole is formed; a second body configured to include at least one second connection member in which a second pinhole communicating with the first pinhole is formed; and a pin member configured to be added and filled in a cavity formed by communicating the first pinhole of the first body and the second pinhole of the second body with each other so that the first body and the second body are foldably connected to each other.

Abstract: A method of manufacturing an end piece for a camshaft may include forming a shape of an end piece to be coupled to a camshaft by compacting steel and powder in a net-shape manner and by sintering steel and a powder compact that are preassembled to each other.

Abstract: A method of manufacturing an end piece for a camshaft may include forming a shape of an end piece to be coupled to a camshaft by compacting steel and powder in a net-shape manner and by sintering steel and a powder compact that are preassembled to each other.

Abstract: A method of manufacturing a door hinge, which can improve productivity by applying both metal injection molding and additive manufacturing is disclosed. The door hinge includes: a first body configured to include at least one first connection member in which a first pinhole is formed; a second body configured to include at least one second connection member in which a second pinhole communicating with the first pinhole is formed; and a pin member configured to be added and filled in a cavity formed by communicating the first pinhole of the first body and the second pinhole of the second body with each other so that the first body and the second body are foldably connected to each other.

Abstract: A method of manufacturing an end piece for a camshaft may include forming a shape of an end piece to be coupled to a camshaft by compacting steel and powder in a net-shape manner and by sintering steel and a powder compact that are preassembled to each other.

Abstract: A heterogeneous powder molded body may include respective powder processed parts formed of different powders, the heterogeneous powder molded body being formed by a forming machine including a die, a lower forming module located under the die to form a lower part of a molded body to be manufactured, and an upper forming module located above the die to form an upper part of the molded body to be manufactured, in which when each of the different powders is input onto the die to form the molded body, the die ascends and thus a filling time of each input powder is secured.

Abstract: A powder metallurgical method includes preparing a liquid lubricant by mixing ethylene bis stearamide 60 to 70 wt % and erucamide 30 to 40 wt % at 150 to 170° C. in a high temperature stirring process. A pulverized solid lubricant is prepared by cooling the liquid lubricant to form a solid and pulverizing the solid. A powder metallurgy composition is prepared by mixing the pulverized solid lubricant 0.4 to 0.75 part by weight to metal-based powder 100 parts by weight, and a molded body is prepared by compression molding of the powder metallurgy composition.