• Title/Summary/Keyword: Moldflow 해석

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A Study on the Injection Molding Process of Inline Skate Frame Using Moldflow (Moldflow를 이용한 인라인스케이트 프레임의 사출성형공정에 관한 연구)

  • Lee, Hyoung-Woo;Park, Chul-Woo
    • Journal of Advanced Marine Engineering and Technology
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    • v.34 no.2
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    • pp.289-295
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    • 2010
  • Injection molding process is one of the most important methods to produce plastic parts with high efficiency and low cost. Today, injection molded parts have been increased dramatically the demand for high strength and quality applications. In this study, In-line skates are made of Al alloy and plastic materials to replace the frame for the optimization process is all about. I interpreted through mold design, Injection molding process that minimizes the runner and the gate dimension will determine the size and shape. Runner and gate dimensions of change based on availability of the product, I'll discuss the injection molding. This report investigates that the optimum injection molding condition for minimum of shrinkage. The FEM Simulation CAE tool, Moldflow, is used for the analysis of injection molding process.

An Analysis of Plastic Injection Molding Process for Automobile Gearbox Cover by Moldflow (Moldflow를 이용한 자동차 기어박스커버의 사출성형공정 해석)

  • Lho, Tae-Jung;Kim, Kyung-Soo
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.9 no.6
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    • pp.1494-1499
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    • 2008
  • Plastic materials are utilized to the most important material of automobile interior-parts due to special characteristics that it is light, good strength and do not transmute quality even if pass long time. This study presented a preliminary analysis of fill time, weld line, air trap etc. for the plastic injection molding process of automobile gearbox cover through simulation using Moldflow.

Injection Molding and Structure Analysis of Inline Skate Frames Using FEA (유한요소해석을 이용한 인라인스케이트 프레임의 사출성형해석 및 구조해석에 관한 연구)

  • Park, Chul-Woo
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.35 no.11
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    • pp.1507-1514
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    • 2011
  • Injection molding is the most commonly used process that uses plastic material. Today, the uses of plastic material are continuously increasing, and the range of application is also being extended by the development of novel materials. An inline skate consists of 4 components: the boot, frame, wheel and brake. Among these components, the frame is the most critical. The injection formability for a variety of injection materials for inline skate frames was studied. We also studied the injection formability of the product for various sizes of the runner and gate. In this study, injection molding analysis was performed using MOLDFLOW, and structural analysis was performed using ANSYS.

Dimensional Optimization of Electric Component in Ultra Thin-wall Injection Molding by Using Moldflow Simulation (초박육 사출성형에서 Moldflow 시뮬레이션을 활용한 전자부품의 형상 최적화)

  • Lee, Jung-Hee;Bae, Hyun-Sun;Kwak, Jae-Seob
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.19 no.7
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    • pp.1-6
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    • 2020
  • Micro-structure components applied to various disciplines are steadily demanded with lighter weight and better quality. This is because that ultra thin-wall injection molding has been paid attention with a lot of benefits such as cost reduction, shorter process period, and so forth. However, this technology is complicate and difficult to obtain high quality of products compared with conventional injection molding due to warpage caused by uneven shrinkage and molecular orientation. Since warpage of products directly affects product quality and overall performance of devices, it is essential to predict deformation behavior to achieve high precision of molded products. Therefore, this study aims to find out adequate thin-wall mold design for FPC connector housing by employing Moldflow simulation before application. In addition, experimental research is performed by using a fabricated mold structure based on simulated results to prove accuracy and reliability of the suggested simulation for warpage analysis.

Application of CAE in Injection Molding Process of Automobile Part (컴퓨터지원공학(CAE)을 활용한 자동차 부품 개선)

  • Cho, Junghwan;Chang, Woojin;Park, Young Hoon;Choe, Soonja
    • Applied Chemistry for Engineering
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    • v.18 no.5
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    • pp.407-414
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    • 2007
  • Using the MPI (Moldflow Plastics Insight) software from Moldflow Co., the optimum conditions for producing the upper part of the automobile air cleaner were obtained for 20% talc filled polypropylene (PP). The analysis was carried out to solve the cracking problem between upper and lower parts and the improved process was proposed using the flow balance. The comparative results between the conventional process, CASE-1, with one-pin gate and the new process (CASE-2) comprising two-pin gate system are the followings. In the case of CASE-2, the shorter filling time and reduced cycle time induced an improved production and processibility. In addition, the orientation and volumetric shrinkage are similar to those observed in the lower part, but the assembly, deformation, and physical characteristics are enhanced. The problem induced by the CASE-1 did not originate from the residual stress, but from the difference in the size of the upper part air cleaner after shrinkage. Thus, the orientation problem was expected to improve by optimizing the gate structure.

Residual Stress Estimation and Deformation Analysis for Injection Molded Plastic Parts using Three-Dimensional Solid Elements (3 차원 입체요소를 사용한 사출성형품의 잔류응력 예측 및 후변형 해석)

  • Park, Keun;Ahn, Jong-Ho;Yim, Chung-Hyuk
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.27 no.4
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    • pp.507-514
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    • 2003
  • Most of CAE analyses for injection molding have been based on the Mele Shaw's approximation: two-dimensional flow analysis. in some cases, that approximation causes significant errors due to loss of the geometrical information as well as simplification of the flow characteristics in the thickness direction. Although injection molding analysis software using three-dimensional solid elements has been developed recently, such as Moldflow Flow3D, it does not contain a deformation analysis function yet. The present work covers three-dimensional deformation analysis or injection molded plastic parts using solid elements. A numerical scheme for deformation analysis has bun proposed from the results of injection molding analysis using Moldflow Flow3D. The accuracy of the proposed approach has been verified through a numerical analysis of rectangular plates with various thicknesses in comparison with the classical shell-based approach. In addition, the reliability of the approach has also been proved through an industrial example. an optical plastic lens, in comparison of real experiments.

A Study on Hopper Design for Minimizing the Wrapage Deformation at Injection Molding Processes (사출공정에서 휨 변형을 최소로 하는 호퍼 설계 연구)

  • Kim, Young-Suk;Lee, Eui-Joo;Son, Jae-Hwan
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.16 no.1
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    • pp.35-42
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    • 2015
  • Injection molding is a high efficient manufacturing technology for producing plastic parts. On the other hand, the warpage of molded plastic parts is an ubiquitous problem in the injection molding process. The main objective of this study was to minimize the amount of warpage occurring in the injection molding process of a hopper of ATDPS made of crystalline polymer (PP) instead of amorphous polymer (ABS). The moldflow CAE simulation was conducted for the molding process of the hopper to clarify the injection moldability, shear rate, shear stress, warpage by changing the gate shape and the number of ribs installed on the top of the hopper flange. The wide gate shape of runner system and multiple rib installation were found to be useful for minimizing the warpage of the hopper. The validity of the CAE simulations was supported by the injection molding experiment for the optimized design case.

Plastic Flow Prediction of Automobile Door-Handle Using Injection Molding Simulation Programs (플라스틱 유동해석 프로그램을 이용한 자동차 도어 핸들의 유동예측)

  • 한성렬;강철민;유호종;정영득
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2004.10a
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    • pp.295-298
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    • 2004
  • Automobile door-handle is assembled with three parts that are base, skin and cover. Over-molding processing makes assembly of the base and skin. The skin part that was made by PVC polymer has various thickness. Plastic injection molding simulation of part including significant changed thickness as skin is an inaccuracy comparing with real injection molding. To solve this problem, two commercial flow prediction software that are Moldflow MPI and MAPS 3D were used in this study. Simulations were conducted for three types mesh. Taguchi method was applied for simulation experiments. It will be need to compare with simulation results and real over-molding behavior in the near future.

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CAE Analysis on the Radius Curvature of Ununiformed wall-thickness Jar (불균일 측벽두께 Jar의 곡률반경에 따른 CAE 해석)

  • Shin, Nam-Ho;Choi, Seok-Jong
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.7 no.6
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    • pp.1040-1046
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    • 2006
  • This paper is aimed to investigate the deformation caused by ununiform contraction of injection molding with highly big differences of thickness by the continuity of various curvature radius. By CAE analysis, the uniform cooling structure and optimum molding conditions are found for Jars made of SAN and PMMA materials and applied to the design of chill. In order toevaluate the molding pressure, resin temperature, molding temperature, cooling conditions, Moldflow program is applied. As results of experiments, the deformation and inferiority phenomena in Jars are analyzed for each factor and proposed the injection molding conditions to minimize the cooling structure and reduce the cycle time.

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