Abstract:
A gas hydrate reactor is disclosed. The reactor includes a supply line (120) for supplying water and gas, a thermoelectric element assembly (130), a front panel (140) provided with a window for observation, and a housing (110) to which the thermoelectric element assembly and the front panel are attached. The housing is connected to the supply line so that water and gas is supplied into the housing through the supply line to form a gas hydrate in the housing.
Abstract:
Provided is a manufacturing method of a magnesium-based alloy for high temperature. The manufacturing method includes melting a magnesium (Mg) or magnesium alloy into a liquid phase, adding calcium oxide (CaO) 1.4 times the weight of a final calcium (Ca) target composition onto a surface of a melt in which the magnesium or the magnesium alloy is melted, forming a targeted amount of Ca in the magnesium or magnesium alloy through a reduction reaction between the melt and the added CaO. Specifically, the amount of Ca formed is in the range of 0.8 wt% to 2.4 wt%, and a final composition of the Mg alloy includes 6.0-8.0 wt% of aluminum (Al), 0.1-0.3 wt% of manganese (Mn), 0.2-0.3 wt% of strontium (Sr), less than 0.04 wt of zinc (Zn), less than 0.9 wt of tin (Sn), and a balance being Mg.
Abstract:
Disclosed are a digital band connector, a receptacle, and a connector assembly for easily connecting digital bands formed of digital yarns to an external circuit. The digital band connector includes connect pins spaced apart from each other in a direction, passing through the digital bands made of digital yarns and to fix the digital bands, and electrically connected with the digital bands, a lower housing fixing the digital bands and the connect pins in a lower part and exposing one end of each of the connect pins through a lower surface, and an upper housing coupled with an upper part of the lower housing to fix the digital bands and the connect pins.
Abstract:
The invention relates to a lightweight camshaft accountable for difference of thermal expansion coefficients. The lightweight camshaft comprises a cam part of iron and a shaft part of lightweight metal for mounting the cam part. The lightweight camshaft comprises a contraction reinforcing part formed on each of the cam pieces to reinforce the strength of bonding between the cam piece of iron and the shaft part of lightweight metal so as to protect the bonding strength against weakening due to the contraction in response to a difference of the thermal expansion coefficients (i.e. shrinkage). A reinforcing joint part is formed at the shaft part by injecting molten lightweight metal into the contraction reinforcing part so that the cam pieces and the shaft part may be integrally combined. Therefore the weakening of the bond strength between the cam pieces and the shaft part could be structurally prohibited.
Abstract:
Disclosed is a reactor for separating an aluminum layer from a multi-layer film wastes to reuse a multi-layer film waste without burying or incinerating the multi-layer film waste including the aluminum. The reactor comprises a cylindrical casing which is filled with a solution to dissolve aluminum layers of the multi-layer film wastes pulverized into a pre¬ determined size, a partition which divided an inner portion of the casing into a reactor tub in which the solution reacts with the aluminum layer and a separator tub which is provided at a portion of the reactor tub to decompose the pulverized multi-layer film wastes in which the aluminum is completely dissolved by the solution, and a stirrer which is installed at an upper portion of the reactor and stirs the solution in the reactor to activate the reaction between the solution and the aluminum in the reactor tub and transfer the multi-layer film wastes to the separator tub and. The partition is spaced apart from a bottom of the casing to form a passage between the bottom of the casing and the partition, and the reactor tub communicates with the separator tub through the passage.
Abstract:
The present invention provides a manufacturing method and apparatus for producing digital yarns using hybrid metal for high speed communication, which can be connected to a network to exchange information in real time in the ubiquitous era, and digital yarns thereof. To achieve the object, the present provides a manufacturing method and apparatus for producing digital yarns using hybrid metal for high speed communication and digital yarns thereof, the manufacturing method comprising: a step of producing a hybrid metal rod; a step of drawing the hybrid metal rod; a step of producing a micro filament; a step of feeding the micro filament; a step of softening the micro filament; a step of forming a sliver; a step of forming a spun yarn; a step of winding the spun yarn; a step of coating the spun yarn with an electromagnetic shielding resin; a step of drying the spun yarn with the electromagnetic shielding resin; and a step of covering the spun yarn with a textile yarn.
Abstract:
Disclosed herein are a flexible aerogel sheet and a preparation method therefore via a dry process. The aerogel sheet includes a needle-punched non-woven fabric, and aerogel particles charged in the fabric. The preparation method includes: scattering aerogel particles in a needle- punched non-woven fabric web; preliminary needle punching the non- woven fabric web; main needle punching the preliminary needle-punched non- woven fabric web; and laminating the main needle -punched non- woven fabric web by thermal treating surfaces thereof. With the use of needle punching, the aerogel particles can be charged in voids in the non- woven fabric, and upper and lower non- woven fabric webs can be firmly attached to each other by bridged fibers, without a binder. Also, the needle punching provides the aerogel sheet with pressure -resistance and load-resistance and prevents deformation of the aerogel sheet due to damage to the aerogel particles. The aerogel sheet having no binder has no risk of clogging in aerogel pores, resulting in superior thermal-insulation property.
Abstract:
It is an object of the present invention to provide a method of manufacturing titanium hydride powder that is capable of manufacturing titanium hydride by using titanium scrap generated during machining as a raw material. Further, according to the method of manufacturing titanium hydride powder, since the titanium scrap is hydrogenated and changed into powder at the same time for a short time, it is possible to reduce the number of processes and manufacturing cost and to improve productivity. In order to achieve the object, according to an embodiment of the present invention, a method of manufacturing titanium hydride powder includes charging titanium scrap into a reaction container, removing air in the reaction container and supplying hydrogen gas to the reaction container, and performing ball milling.
Abstract:
A method and an apparatus of manufacturing airtight safety garments via ultrasonic welding, and more particularly, to a method and an apparatus of manufacturing safety garments by heating and melting synthetic fiber sheets at a melting point or higher via ultrasonic welding and then pressing the fiber sheets against each other to bond them together. The method includes: (a) feeding two fiber sheets; (b) automatically aligning edges of the fiber sheets so that the fiber sheets overlap partially with each other; (c) adjusting a height of a pattern roller according to a thickness of overlaps of the fiber sheets; and (d) transmitting energy to the pattern roller, by an ultrasonic generator, to weld and bond the overlaps of the fiber sheets.
Abstract:
The present invention relates to a laser-rotating arc hybrid welding system and a welding method using the system. The laser-rotating arc hybrid welding system of the present invention includes an arc discharge unit (2) for generating arc discharge along an area to be welded. A laser generation unit (4) radiates laser light onto the area to be welded. A rotating device (24) rotates the arc discharge unit (2). In the welding method using the laser-rotating arc hybrid welding system, a plurality of parent metals is aligned with a welding location. A laser-rotating arc hybrid welding system is located with respect to an area to be welded, arc discharge is generated while an arc discharge unit is rotated at a predetermined turning radius, and laser light is subsequently radiated using a laser generation unit.