• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2000년도 추계학술대회 논문집
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• pp.362-365
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• 2000

Rapid Prototyping(RP) techniques have revolutionized traditional manufacturing methods. These techniques allow the user to fabricate a part directly from a conceptual model before investing in production tooling and help develop new models with significant short time. This paper suggests to new process to manufacture large size hollow shape parts for prototype-car using Rapid Prototyping technology and Vacuum Molding with the reduction of delivery time. In addition, This paper introduces the dividing and combining method to make large size RP master model in spite of the limit of the build chamber dimensions of commercialized RP system and post-processing method to achieve sufficient surface quality.

• 한국기계가공학회지
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• 제19권4호
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• pp.36-44
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• 2020

This study analyzed the deformation behavior of the high density polyethylene (HDPE) bottle in the blow molding process. We carried out finite element (FE) simulations using ANSYS Polyflow. First, the axisymmetric model was executed by 2D FE-simulation to determine the change of bottle wall thickness during the molding process. Then, the square model of the bottle was executed by 3D FE-simulation to gauge the effects of gas pressure on the change of wall thickness. The experiment results showed that the FE-simulations were able to upgrade the quality of the HDPE bottle in the blow molding process. These results can be used as guidance in adjusting gas pressure, as well as be extended for further study to determine process parameters such as temperatures, forming velocity, parison shape, etc.

• 한국포장학회지
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• 제22권3호
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• pp.103-106
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• 2016

태국의 플라스틱 소비는 포장분야 49%, 직물 15%, 건설 11%, 전기전자가 10% 순으로 나타났다. 종사자는 106천명이며 공장생산 용량대비 실제 생산은 85%이고 식품포장용 플라스틱수지 수요는 월간 135천톤에 달한다. 업종별 제조사는 필름가공업체가 503개 공장으로 전체의 39%를 점하며 인젝션 몰딩 사가 231개로 18%, 블로우 몰딩 사가 216개사로 17% 순으로 나타났다. 주요 수지들의 생산은 PP는 총 1,950천톤을 생산하였으며, LDPE는 685천톤을 LLDPE는 1,150천톤을 생산하였고, HDPE는 1,920천톤을 생산한 것으로 나타났다. 플라스틱 수입은 16,668백만 바트였고 수출은 33,778백만 바트로 수출액이 2배 이상 높은 것으로 나타났다.