Abstract:
A head device of three-dimensional modeling equipment is disclosed which has unidirectionally rotating polygon mirrors, can perform biaxial scanning at a high speed due to a combination of the mirrors, can easily control timing and a modeling ray irradiation position, and can enhance modeling precision. A scanning method for a modeling plane using the same is also disclosed.
Abstract:
Provided are alkoxysilylated epoxy compounds, a composite of which exhibits good heat resistance properties, low CTE and increased glass transition temperature, and a cured product thereof exhibits good flame retardancy without requiring separate coupling agent, a method for preparing the same and a composition and a cured product including the same. An alkoxysilylated epoxy compound including an epoxy group and at least one alkoxysilyl group of an S1 substituent selected from Formulae S11 to S15 or an S2 substituent selected from Formulae S21 to S25; a method for preparing the same by epoxy ring-opening reaction of starting material and alkoxysilylation, an epoxy composition including the epoxy compound, and a cured product and a use of the composition, are provided. Since chemical bonds may be formed between alkoxysilyl group and filler and between alkoxysilyl groups, chemical bonding efficiency of the composite may be improved.
Abstract:
Provided are an alkoxysilylated epoxy compound, a composite of which exhibits good heat resistance properties, particularly low CTE and increased glass transition temperature, and a cured product thereof exhibits good flame retardancy and composition of which does not require additional silane coupling agent, a method for preparing the same and a composition and a cured product including the same. An alkoxysilylated epoxy compound including at least one alkoxysilyl group and at least two epoxy groups, a method for preparing the same by epoxide ring-opening reaction of starting material and alkoxysilylation, an epoxy composition including the epoxy compound, and a cured product and a use of the composition are provided. Since chemical bonds may be formed between alkoxysilyl group and filler and between alkoxysilyl groups, chemical bonding efficiency of the composite may be improved. Thus, the composite exhibits good heat resistance properties and the cured product exhibits good flame retardancy.
Abstract:
An embodiment of the present disclosure, provides a method of optical inspection on a carbon fiber reinforced plastics (CFRP) component in which performs an inspection, by maintaining the focal distance for a surface of an object to be inspected, and making a light axis of an image device and a normal line of the surface of the object to be inspected to be identical.
Abstract:
Provided are an aluminum alloy and a production method thereof. In accordance with an embodiment, an aluminum-based mother material is melted to form a molten metal. An additive including silicon oxide is added to the molten metal. At least a portion of the silicon oxide is exhausted in the molten metal. The molten metal is cast.
Abstract:
The present invention relates to a preparation method of a tungsten carbide sintered body for a friction stir welding tool used in a friction stir welding tool of a high melting point material such as steel, titanium and the like or a dissimilar material such as aluminum, magnesium-steel, titanium and the like. The preparation method comprises the following steps: filling a tungsten carbide (WC) powder in a mold made of a graphite material; mounting the mold filled with tungsten carbide powder in a chamber of a discharge plasma sintering apparatus; making a vacuum inside of the chamber; molding the tungsten carbide powder while maintaining a constant pressure inside the mold and increasing the temperature according to a set heat increase pattern until the temperature reaches a final target temperature; and cooling the inside of the chamber while maintaining the pressure pressurized in the mold after the molding step.
Abstract:
A regenerative fluid machine having guide vanes on a flow channel wall is disclosed. The regenerative fluid machine includes a circular plate-shaped impeller having a plurality of vanes radially formed on an outer circumference thereof at regular intervals, casings in which the impeller is housed, and flow channels, each of which has a suction hole and a discharge hole in opposite ends thereof, and which are circumferentially disposed within the casings so as to face the vanes. The plurality of guide vanes having an inclined angle (θ) with respect to a radial direction protrude from the flow channel wall in a rotational direction of the impeller so that a relative inflow angle (β) of the fluid introduced into the impeller grooves is increased and thus an absolute inflow angle (α) is decreased.
Abstract:
Disclosed is a multi-volute sirocco fan (multiblade fan). The present invention relates to a multi-volute sirocco fan configured to discharge fluid into several directions while using one motor and one fan. The sirocco fan according to the present invention comprises: a driving motor; a fan connected to a rotation shaft of the driving motor to thus be rotated therewith, the fan having a plurality of vanes arranged and installed in a cylindrical shape along the circumferential direction thereof; and at least two stacked volutes in the center of which the fan is arranged and installed and which guide the fluid while the cross-sectional area formed by the upper and lower surfaces, side surfaces thereof and the outer circumferential surface of the fan is linearly increased.
Abstract:
One embodiment of the present invention relates to a method for manufacturing solar cells having a nano-micro composite structure on a silicon substrate and solar cells manufactured thereby. The technical problem to be solved is to provide a method for manufacturing solar cells and solar cells manufactured thereby, the method being capable of forming micro wires in various sizes according to the lithographic design of a photoresist and forming nano wires, which have various sizes and aspect ratios, by adjusting the concentration of a wet etching solution and immersion time.
Abstract:
The present invention related to an iron bus bar coated with copper and a method of manufacturing the same. The present invention provides an iron bus bar including an iron core and a copper layer applied on the iron core, and a method of manufacturing the same. According to the present invention, an iron bus bar having high strength and durability as well as excellent electrical conductivity can be manufactured at low cost.