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Применить Всего найдено 4. Отображено 4.
31-03-2017 дата публикации

자재 파쇄시 비산성 평가 장치

Номер: KR0101721835B1
Автор: 선일식, 이재형, 이정일, 백선호, 장순복, 황범구, 정민종, 김남준, 이진욱, 권예빈
Принадлежит: 재단법인 한국화학융합시험연구원

... 본 발명은 자재 파쇄시 비산성 평가 장치에 관한 것으로서, 내화뿜칠재, 천장재, 지붕재 등의 각종 건축자재에 대해서 석면섬유 등의 함유 물질이 비산되는 것을 방지하기 위한 안정화제를 도포한 후 파쇄할 때 석면섬유 등의 비산 유무를 정확하고 객관적으로 평가하는데 이용할 수 있는 비산성 평가 장치를 제공하는데 그 목적이 있는 것이다. 상기한 목적을 달성하기 위해, 밀폐 가능한 내부공간을 가지는 챔버; 챔버 내부공간 하부에 설치되어 시험 대상의 자재 시편인 시험체가 장착되는 시험체 거치대; 챔버 내부공간 상부에 설치되어 시험체 거치대에 장착된 시험체에 낙하추를 낙하시켜 시험체를 파쇄하는 낙하 장치; 챔버 내부공간에서 송풍을 통하여 시험체 파쇄시 시험체에 함유된 비산 물질을 비산시키기 위한 전동팬; 및 챔버 내부 공기를 흡입하여 공기 중에 비산되어 있는 비산 물질을 포집하는 포집장치를 포함하는 자재 파쇄시 비산성 평가 장치가 개시된다.

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Номер записи: 1
21-09-2016 дата публикации

BRASS-PLATED STEEL WIRE FOR GOLD-PLATED SPRING AND MANUFACTURING METHOD THEREOF

Номер: KR1020160109189A
Автор: KIM, JONG SUNG, JUNG, MIN JONG, LIM, HAN JUN
Принадлежит:

The present invention relates to a steel wire used as a material for a gold-plated spring. A brass-plated layer, containing 30-45% of zinc and 55-70% of copper, is formed on the surface of the steel wire with 0.5-2.0μm of thickness. A concentration of Fe among components of the brass-plated layer is not more than 4%. According to the present invention, a method to manufacture a steel wire includes: a step of primarily drawing a material wire rod in a dry state with a diameter of 2.0-4.0mm; a step of thermally treating the primarily drawn steel wire and then secondarily drawing the same with a diameter of 0.5-1.5mm; a step of sequentially forming copper and zinc-plated layers, containing 55-70% of copper and 30-45% of zinc, on the surface of the secondarily drawn steel wire and then a brass-plated layer with 2.0-4.0μm through thermal diffusion; and a step of tertiarily drawing the wire so that the thickness of the brass-plated layer becomes 0.5-2.0μm and the final diameter of the wire becomes ...

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Номер записи: 2
06-10-2015 дата публикации

RELEASABLE CHARACTERISTICS ASSESSMENT APPARATUS IN GRINDING OF MATERIAL

Номер: KR1020150111683A
Автор: SUN, YLE SHIK, LEE, JAE HYUNG, LEE, JEONG IL, BAEK, SEON HO, JANG, SUN BOK, HWANG, BEOM GOO, JEONG, MIN JONG, KIM, NAM JUN, LEE, JIN WOOK, KWON, YE BIN
Принадлежит:

The present invention relates to a releasable characteristics assessment apparatus in the grinding of a material. The purpose of the present invention is to provide the releasable characteristics assessment apparatus used for objectively and accurately assessing the releasable characteristics of asbestos fibers in a grinding process after spraying a stabilizer for preventing content materials like the asbestos fibers from being scattered with regard to various construction materials of sprayed fire resistive materials, ceiling materials, and roof materials. For achieving the purpose, disclosed is the releasable characteristics assessment apparatus in the grinding of the material which includes a chamber which includes an inner space which is sealed, an object holder which is installed on the upper side of the inner space of the chamber and mounts an object which is a material specimen of a test target, a dropping device which is installed on the upper side of the inner space of the chamber ...

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Номер записи: 3
15-09-2016 дата публикации

BRASS-PLATED STEEL WIRE FOR GOLD-PLATED SPRING AND METHOD FOR MANUFACTURING SAME

Номер: WO2016143946A1
Автор: KIM, Jong Sung, JUNG, Min Jong, LIM, Han Jun
Принадлежит:

The present invention relates to a brass-plated steel wire for a gold-plated spring, which is a steel wire used as a material of a gold-plated spring, characterized in that a brass plating layer, which has a zinc content of 30-45% and a copper content of 55-70%, is formed on the surface of the steel wire at a thickness of 0.5-2.0μm, and the density of Fe, among the components of the brass plating layer, is 4% or less. A method for manufacturing a brass-plated steel wire for a gold-plated spring according to the present invention comprises the steps of: primarily dry-drawing a material wire rod such that the same has a diameter of 2.0-4.0mm; heat-treating the primarily drawn steel wire and then secondarily dry-drawing the same such that the same has a diameter of 0.5-1.5mm; successively forming a copper plating layer and a zinc plating layer on the surface of the secondarily drawn steel wire such that the copper content becomes 55-70% and the zinc content becomes 30-45% and then forming ...

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Номер записи: 4