초정밀 박육 플라스틱 제품 성형기술에 관한 연구

허영무,신광호,Heo, Young-Moo,Shin, Kwang-Ho 한국금형공학회 2016 한국금형공학회지 Vol.10 No.2

In the semiconductor industry the final products were checked for several environments before sell the products. The burning test of memory and chip was implemented in reliability for all of parts. The memory and chip were developed to high density memory and high performance chip, so circuit design was also high integrated and the test bed was needed to be thin and fine pitch socket. LGA(Land Grid Array) IC socket with thin wall thickness was designed to satisfy this requirement. The LGA IC socket plastic part was manufacture by injection molding process, it was needed accuracy, stiffness and suit resin with high flowability. In this study, injection molding process analysis was executed for 2 and 4 cavities moldings with runner, gate and sprue. The warpage analysis was also implemented for further gate removal process. Through the analyses the total deformations of the moldings were predicted within maximum 0.05mm deformation. Finally in consideration of these results, 2 and 4 cavities molds were designed and made and tested in injection molding process.

초정밀 박육 플라스틱 제품 성형기술- II. 냉간 절단 공정 활용 사이드 게이트 제거기술

허영무,신광호,최복석,권오근,Heo, Young-Moo,Shin, Kwang-Ho,Choi, Bok-Seok,Kwon, Oh-Keun 한국금형공학회 2016 한국금형공학회지 Vol.10 No.3

In the semiconductor industry the memory and chip were developed to high density memory and high performance chip, so circuit design was also high integrated and the test bed was needed to be thin and fine pitch socket. LGA(Land Grid Array) IC socket with thin wall thickness was designed to satisfy this requirement. The LGA IC socket plastic part was manufacture by injection molding process, it was needed accuracy, stiffness and suit resin with high flowability. After injection molding process the side gates were needed to remove for further assembly process. ln this study, the cold press cutting process was applied to remove the gates. For design of punch and die, the cold press cutting analysis was implemented by$DEFORM-2D^{TM}$ ln consideration of the simulation results, an adequate punch and die was designed and made for the cutting unit. In order to verify the performance of cutting process, the roughness of cutting section of the part was measured and was satisfied in requirement.

The Separation Behaviors from Assemble Conditions for Pitch 1.25mm Level Wire to Board Connector

허영무,윤길상,Heo, Young-Moo,Yoon, Gil-Sang Korean Society of Die Mold Engineering 2016 한국금형공학회지 Vol.10 No.1

In this study, the modification structure design of insulation displacement connector developed was considered for simplification of assembly process. The modified connector consisted terminal, wafer and fitting nails. The separation behavior under locking condition for pitch 1.25mm wire to board connector was measured and the apparatus for the test was made. The maximum restraining force was measured about 4.5kgf that was bigger value than the specification limit. And the pulling force of a wire was also indicated about 2.3kgf.

마이크로 구동부품 제조를 위한 PIM 금형 기술

허영무(Young Moo Heo),장성호(Sung Ho Chang),신광호(Kwang Ho Shin),조명우(Myung Woo Cho),제태진(Tae Jin Je) 한국생산제조학회 2011 한국생산제조시스템학회 학술발표대회 논문집 Vol.2011 No.4

In this paper, for manufacturing of a micro metallic gear(outer diameter 800㎛, module 0.1, number of teeth 8), a wire-cutting technology was applied to make 2 cores with small radii for the powder injection molding process. The core fabricated by wire-cut EDM process with wire dia. 50㎛ and 2 cavity mold assembled for PIM process. The stainless steel powders(17-4PH 3F/15F) are used in the powder injection molding process. This process is implemented with the mold fabricated using the injection molding machine(ENGEL). The green parts are de-binded and sintered to get the metal micro gear parts. A little incomplete filling behavior is occurred at the end filling area.

사출성형용 금형의 기능 및 구조에 대한 고찰

허영무(Young Moo Heo) 한국소성·가공학회 2002 소성가공 : 한국소성가공학회지 Vol.11 No.8

용접판재의 성형한계에 관한 실험적 연구

허영무(Young Moo Heo),김형목(Hyung Mok Kim),서대교(Dae Gyo Seo) 한국소성·가공학회 1999 소성가공 : 한국소성가공학회지 Vol.8 No.5

사해행위취소소송에서 피보전권리의 발생시기 -민법 제839조의3 신설 이후 판례를 중심으로-

허영무 ( Young Moo Huh ) 홍익대학교 법학연구소 2010 홍익법학 Vol.11 No.3

이혼한 배우자가 재산분할청구권에 관한 채무명의를 얻었다 하더라도(예컨대, 재산분할 및 위자료에 관한 집행력 있는 판결, 화해조서, 조정조서 등) 재산분할을 해야 할 일방이 그 재산을 처분하여 분할할 재산이 없게 된 때에는 재산분할청구권은 실제로 실효성이 없게 된다. 이러한 경우, 재산도피 이후에 성립한 재산분할청구권을 피보전권리로 하여 채권자취소권을 행사할 수 있는가 하는 문제가 생긴다. 다행히도 우리민법은 최근 2007년 12월 21일 법률 제8720호로 개정된 민법에서 제839조의3을 신설하여 재산분할청구권 보전을 위한 사해행위취소권을 새롭게 도입하였다. 이 규정에 의하면, 부부 일방이 다른 일방의 재산분할청구권 행사를 해함을 알면서도 재산권을 목적으로 하는 법률행위를 한 때에는 사해행위취소권을 행사함으로써 분할의 대상이 되는 재산의 원상회복을 도모할 수 있게 되었다. 위 규정의 입법취지는 재산분할청구권 성립시기와 관계없이 명의를 가진 배우자가 분할대상재산을 몰래 처분한 경우 포괄적으로 사해행위를 인정하여 그 취소권을 행사할 수 있도록 상대적으로 명의를 갖지 못한 배우자의 권리를 보호한다는 취지에서 도입한 것으로 보인다. 그러나 신설조항이 민법 제406조 제1항을 준용하여 행사하도록 규정하고 있어 종래의 문제점을 완전히 극복하지는 못한 것으로 보여 분할대상 재산을 몰래 처분한 후에 성립한 재산분할청구권의 피보전채권성 여부에 관하여는 여전히 해석에 의존할 수밖에 없어 구체적이고 객관적인 기준 마련이 시급하다. 따라서 이 글에서는 주로 하급심 판례를 중심으로(아직 대법원 판례가 없다) 재산분할청구권이 성립하기 전에 일방배우자가 몰래 분할대상재산을 처분하고 난 이후에 뒤늦게 성립한 재산분할청구권이 제839조의3에서 규정한 피보전채권으로 적격을 갖는지 여부에 관하여 살펴보았다. 특히 재산분할청구의 소제기 전에 분할대상 재산을 몰래 처분한 경우는 물론 소제기 이후에 처분한 경우에도 재산분할청구권에 기한 채권자취소권이 인정될 것인지 여부까지 검토하였다. 채권자취소권에 있어서의 피보전채권은 사해행위라고 볼 수 있는 행위가 행하여지기 전에 발생된 것임을 요한다고 하는 일반원칙은 일단 원칙론으로서는 정당하다. 하지만 위 원칙은 모든 경우에 적용되는 보편타당한 원칙은 아니라는 점에 주의하여야 한다. 필자는 구체적인 사안에 따라 채권이 성립하기 전에도 채권자를 위하여 채무자의 책임재산을 보전할 필요가 있는 경우가 있을 수 있고, 채무자의 입장에서도 구체적인 채권의 성립 전에도 채권자를 해한다는 인식이 있을 수 있기 때문에 사해행위 이후에 성립한 채권에 대하여도 예외적으로 피보전권리성을 인정해야 할 필요성이 있다는 점을 밝혔고, 하급심의 실무에서도 같은 견해를 취하고 있는 것으로 보여 다행스럽게 생각한다. 앞으로 대법원의 판례도 기대된다. This survey reviewed whether the wife, who has the right of division of property on divorce, can exercise the right of revocation based on the obligee`s right of revocation under the Korean Civil Code Article 839-3 in regard to the property which the husband disposed of without his wife`s consent. The Korean Civil Code Article 839-2 provides the claim of division of property obtained by the common efforts of both spouses during marriage under the name of the husband. According to the Korean Civil Code Article 830, the property under the name of the husband is regarded as his specific property. As a result of this, he can independently dispose of this property without his wife`s consent. Therefore, if the husband independently disposed of the property obtained by cooperation of both spouses during marriage, there may not be any property for the wife to claim on divorce. In this paper, I made a study of the means for wife to exercise the claim of division of property. Accordingly, I suggested two solutions to these problems, which are unfavourable to women in the notion of the impartial division of the property acquired during the marriage by both spouses. First, it is necessary that the wife can exercise the obligee`s right of revocation under the Korean Civil Code Article 839-3 in regard to the property which the husband disposed of without his wife`s consent. Second, we should construe the specific property on Article 830 as the property in co-ownership regardless of the name of the property. By this construction, the wife can exercise the right of revocation against the subsequent purchaser who acquired the property in co-ownership from the husband who disposed of it. With regard to this construction, I introduce the legislative instances of foreign country and present the theoretical basis. In principle, it is necessary that the right of the obligee should be brought into existence prior to the legal act which prejudice the property right of the obligee for the obligee to exercise the obligee`s right of revocation. Court decisions, however, have recently recognized the exercise of the obligee`s right of revocation, which came into existence posterior to the legal act, which prejudiced the property right of the obligee. In this paper, I reviewed the Supreme Court decisions, the lower court decisions, and Japanese Court decisions which recognized the obligee`s right of revocation exceptionally, and presented the theoretical basis which enables the exercise of the obligee`s right of revocation. Consequently, for the realization of true equality of the sexes under Article 36(1) of the Constitution, the wife should have the right of revocation by claimant of division of property on divorce based on the Korean Civil Code Article 406, 839-3, which provide that if the obligor willfully performs a legal act which would prejudice the property right of the obligee, the obligee may apply to the court for revocation thereof to return the matter to its original status. Additionally, the specific property on the Korean Civil Code Article 830 should be construed as the property in co-ownership.

두께 200 ㎛ 제품의 사출성형특성 고찰

허영무(Young-Moo Heo),신광호(Kwang-Ho Shin),윤길상(Gil-Sang Yoon),장성호(Sung-Ho Chang),정우철(Woo-Chul Jung) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5

In recent industry, according to pursuit the miniaturization and high-precision of machine part with development of new technology as IT, BT the development of mold manufacturing technology for mass production is accompanied. In this study, the spiral type injection mold with a 200 ㎛ thickness shape is made for investigation of influence for injection molding process variables and the flow length is measured through an experiment. Taguchi method is used in this experiment and the obtained data are analyzed using ANOVA method.

GMP 공정용 3 cavity 유리 렌즈 금형의 열변형에 관한 연구

장성호,허영무,신광호,정태성,Chang, Sung-Ho,Heo, Young-Moo,Shin, Gwang-Ho,Jung, Tae-Sung 한국금형공학회 2008 한국금형공학회지 Vol.2 No.6

Recently, the demands of digital camera and miniature camera module for mobile-phone is increased significantly. Lenses which is the core component of optical products are made by the injection molding(plastic lens) or GMP(glass lens). Plastic lens is not enough to improve the resolution and performance of optic parts. Therefore, the requirement of glass lens is increased because it is possible to ensure the high performance and resolution. In this paper, the thermal stress analysis of 3 cavity GMP mold for molding glass lens was performed for estimating the thermal stress and amount of deformation. Finally, the modification plan based on the analysis results was deducted.

인서트 코어 타입 Cap 성형용 대용량 금형 제작에 관한 연구

정우철,허영무,신광호,윤길상,이정원,Jung, Woo-Chul,Heo, Young-Moo,Shin, Gwang-Ho,Yoon, Gil-Sang,Lee, Jeong-Won 한국금형공학회 2008 한국금형공학회지 Vol.2 No.3

In recent, the demands of household cases and disposable products is increased significantly because a living standard of newly-emerging nations was risen. Therefore, multi-cavity mold and stack mold for the realization of high-productivity have been researched in forefront nations. In this paper, CAE analysis for minimizing the mold core deformation was performed. Finally, 64 cavities injection mold for molding cap which has the insert-type core was fabricated according to the result of CAE analysis.