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Table of Contents

Journal Papers

Journal Papers

2021

2021

Yu-Ho Wen, Chen-Chieh Wang, Guo-Sian Cyue, Rong-Hao Kuo, Chia-Hsiang Hsu and Rong-Yeu Chang
Polymers (2021)
For highly viscous polymer melts, considerable fluid temperature rises produced by viscous heating can be a disturbing factor in viscosity measurements. By scrutinizing the experimental and simulated capillary pressure losses for polymeric liquids, we demonstrate the importance...
Huan-Chang Tseng
Physics of Fluids (2021)
A viscosity overshoot of fibers filled in a polymer melt under a shear flow is much tougher to predict via the existing constitutive equations of suspension rheology in a viscous media, owing to the effect of fiber orientation on the viscoelastic behavior. The WMT-X (White–Metzner...
Huan-Chang Tseng
Physics of Fluids (2021)
Predicting a transient stress overshoot for polymer melts under startup shear flow is challenging. In recent, the classical White–Metzner (WM) constitutive equation of nonlinear viscoelastic fluids was potentially extended. For viscoelastic material functions, the minus...
Huan-Chang Tseng
Physics of Fluids (2021)
The famous White–Metzner (WM) constitutive equation expresses a relatively simple nonlinear viscoelastic fluid of polymer melts. However, such a differential stress model, substantial with strong hyperbolic and singular problems, has hitherto always obtained unsatisfactory...
Yuan-Jung Chang, Rong-Yeu Chang, and Tim A. Osswald
Physics of Fluids (2021)
Bulk viscosity describes the irreversible resistance to the rate of volume change. Bulk viscosity, which is more than ten thousand times higher than shear viscosity, has been ignored in the field of polymer processing for the past decades. Bulk viscosity may play an important role for...
2016-2020

2016-2020

Huan-Chang Tseng
Journal of Rheology (2020)
Creating an entry vortex growth simulation to show viscous and elastic fluid behaviors has always been a major challenge for the computational rheology of well-characterized polymer melts with extension thickening. For one thing, it is difficult to ensure stable convergence and...
Huan-Chang Tseng , Rong-Yeu Chang and Chia-Hsiang Hsu
Journal of Thermoplastic Composite Materials (2020)
In the structural analysis of automotive products made of lightweight fiber-reinforced thermoplastics (FRT), the primary mechanical requirement is their relation to the orientation states of fibers. The famous Folgar–Tucker equation of fiber orientation has hitherto been...
Chao-Tsai Huang, Rong-Yeu Chang, and Chia-Hsiang Hsu
International Polymer Processing (2018)
Understanding the effect of fiber orientation on mechanical properties is a primary consideration for long fiber-reinforced thermoplastics in automotive applications. In injection-molded parts, the classical Folgar-Tucker model has been used to predict the shell-core...
Huan-Chang Tseng, Rong-Yeu Chang, and Chia-Hsiang Hsu
International Polymer Processing (2018)
Fiber composites are the pinnacle of lightweight materials in the automotive industry. The orientation of the reinforcing fibers strongly affects the mechanical performance of the finished part. However, fiber orientation prediction with high accuracy is difficult for a complex flow...
Huan-Chang Tseng, Rong-Yeu Chang, and Chia-Hsiang Hsu
Journal of Rheology (2018)
The Phelps-Tucker anisotropic rotary diffusion (ARD) equation constitutes an important development in relation to concentrated fiber suspension rheology and is significant in its ability to predict transient, flow-induced fiber orientation, especially for long fiber composites...
Chao-Tsai Huang, Huan-Chang Tseng
PES (2017)
In recent years, the use of long fiber-reinforced thermoplastics (LFRT) has become one of the most popular materials in lightweight applications. However, the microstructure of the fiber inside the plastic matrix is quite complex, making it hard to fully control the fiber effect in the...
Chao-Tsai Huang
The International Journal of Advanced Manufacturing Technology (2017)
Co-injection molding and multi-cavity molding are common processes for plastic products manufacturing. These two systems are sometimes combined and applied in the manufacture of bifurcation-structure products. However, how the influential factors truly affect the...
Chih-Chung Hsu, Chao-Tsai Huang and Rong-Yeu Chang
JPE (2017)
The gas-assisted injection molding (GAIM) process is often adopted to compensate for shrinkage and improve part quality. However, gas penetrations consisting of primary and secondary penetrations will usually induce “fingering” behaviors, in which gas penetrates...
Huan-Chang Tseng, Rong-Yeu Chang, and Chia-Hsiang Hsu
Journal of Thermoplastic Composite Materials (2017)
The microstructures of injection-molded short fiber composites, involving fiber orientation and fiber concentration, strikingly influence flow behaviors and mechanical properties. Through the use of certain commercial software, reported numerical predictions of fiber orientation for the...
Huan-Chang Tseng, Rong-Yeu Chang, and Chia-Hsiang Hsu
Journal of Thermoplastic Composite Materials (2017)
During the packing or post-filling stage, a significant flow of polymer inside the cavity may result due to the compressibility of the polymer melt under the higher packing pressure of the injection molding process. In the meantime, the effect of the packing stage on the shell–core...
Chao-Tsai Huang, Huan-Chang Tseng
Polymer Engineering and Science (2017)
In recent years, the use of long fiber-reinforced thermoplastics (LFRT) has become one of the most popular materials in lightweight applications. However, the microstructure of the fiber inside the plastic matrix is quite complex, making it hard to fully control the fiber effect in the...
Huan-Chang Tseng, Rong-Yeu Chang, and Chia-Hsiang Hsu
Polymer Composites (2017)
The use of long carbon fiber-reinforced thermoplastic composites as lightweight automotive materials offers superior mechanical performance compared to glass fibers. However, the anisotropic fiber orientation distribution with shell–core structure is critical to determine...
Huan-Chang Tseng, Rong-Yeu Chang, and Chia-Hsiang Hsu
Polymer Composites (2017)
Predictions of fiber orientation dependent mechanical properties are extremely important in the automotive industry for injection molded fiber-reinforced thermoplastic composites. Prior studies on three-dimensional (3D) numerical computations have not had satisfactory results...
Huan-Chang Tseng, Massato Gato, Rong-Yeu Chang, and Chia-Hsiang Hsu
Polymer Composites (2017)
Mechanical performance of lightweight automotive materials made of long fiber-reinforced thermoplastic composites is potentially superior to that of short fiber. However, accurate prediction of fiber orientation is critical for determining reliable mechanical properties. Thus...
Huan-Chang Tseng, Rong-Yeu Chang, and Chia-Hsiang Hsu
Composites Science and Technology (2017)
requirement for improving mechanical performance and carrying out structural analysis for long fiberreinforced thermoplastics (LFRT) in injection molding. When using 3D-mesh computation, the orientation in the shell layer was predicted fairly well, but resulted in over-predictive...
Huan-Chang Tseng, Rong-Yeu Chang, and Chia-Hsiang Hsu
Composites (2017)
Highly concentrated fiber suspensions exhibit complex rheological behaviors. There is a particular broader core region of the fiber orientation structure for fiber-filled parts in the injection molding process. However, there is a long-running problem requiring an urgent...
Huan-Chang Tseng, Rong-Yeu Chang, and Chia-Hsiang Hsu
International Polymer Processing (2017)
Long fiber-reinforced thermoplastic (LFRT) composites are a very important lightweight material for practical use by the automotive industry because their mechanical performance is superior to that of short fibers. Microstructures of LFRT products, including fiber orientation...
Huan-Chang Tseng, Rong-Yeu Chang, and Chia-Hsiang Hsu
Composites (2017)
Fiber orientation distribution in injection molded fiber composites has an important shell-core structure. Recently, significant theoretical orientation models, including RSC (Reduced Strain Closure), ARD (Anisotropic Rotary Diffusion), and iARD-RPR (improved ARD and Retarding...
Huan-Chang Tseng, Rong-Yeu Chang, and Chia-Hsiang Hsu
Composites Science and Technology (2017)
Fiber reinforced polymer (FRP) composites offer exciting new possibilities for the green automotive industry, owing to their excellent mechanical properties, advantageous weight reduction and economical fuel consumption. In practice, accurately predicting fiber orientation...
Chao-Tsai Huang, Che-Ping Lin, Shih-Po Sun, Shi-Chang Tseng and Rong-Yeu Chang
Materials and Product Technology (2016)
Multiple component moulding (MCM) is one of the great methods to fabricate the modern injection products. Due to many procedure combinations, it is very difficult to know the detailed process. Besides, because of its complicated nature and the unclear physical mechanism...
Huan-Chang Tseng, Rong-Yeu Chang, and Chia-Hsiang Hsu
Journal of Rheology (2016)
The improved anisotropic rotary diffusion (iARD) model was previously regarded as a suitable description of anisotropic orientation states for long fibers in concentrated suspensions. However, the iARD tensor does not pass the classic rheological rule of Euclidean objectivity...
2011-2015

2011-2015

Chao-Tsai Huang, Huan-Chang Tseng, Jiri Vlcek and Rong-Yeu Chang
Materials Science and Engineering (2015)
Due to the high demand of smart green, the lightweight technologies have become the driving force for the development of automotives and other industries in recent years. Among those technologies, using short and long fiber-reinforced plastics (FRP) to replace some metal...
Chao-Tsai Huang, Jackie Yang, Rong-Yeu Chang
AIP Conference Proceedings (2015)
Co-Injection Molding and multi-cavity molding are very common processes for plastic manufacturing. These two systems are sometimes combined and applied to some structure products. The core penetration and flow balance control problems are very difficult to...
Peter H. Forss, Huan-Chang Tseng, John Snawerdt, Yuan-Jung Chang2, Wen-Hsien Yang2, Chia-Hsiang Hsu
Polymer Composites (2014)
In the automotive industry, glass-filled thermoplastics are used in air intake manifolds, radiator tanks, and many other parts. However, widespread application of glass-filled thermoplastic materials has been limited in many cases by the inability to accurately predict performance...
Tzu-Chau Chen, Chao-Tsai Huang, Yan-Chen Chiu, Wei-Da Wang, Cheng-Li Hsu, Chen-Yang Lin, and Lung-Wen Kao
International Journal of Precision Engineering and Manufacturing (JPEM) (2013)
Runner system plays a very important role in injection molding process. A quality runner design is helpful in improving product qualities and saving material. However, traditional cold runner systems have certain inherent issues. Moreover, poor product cosmetics are commonly seen...
Fu-Hung Hsu, Chao-Tsai Huang, Rong-Yeu Chang
APEM Journal (2013)
Most advanced technologies developed nowadays focus on issues such as minimizing manufacturing cost and improving product quality. Cooling system design is one of the most critical factors to reduce cycle time. Conformal cool-ing is the concept which can reduce...
Huan-Chang Tseng, Rong-Yeu Chang, and Chia-Hsiang Hsu
Journal of Rheology (2013)
The standard Folgar-Tucker (FT) orientation equation is a useful method for theoretically determining isotropic fiber orientation in concentrated suspensions. However, when quantitatively compared with related experimental observations, this equation demonstrates...
Chao-Tsai Huang, I-Sheng Hsieh, and Cheng-Han Tsai
International Polymer Processing (2011)
To eliminate surface defects and improve the quality of molded parts, increasing the mold temperature is one of the solutions. Using high mold temperature can eliminate weld lines, reduce molding pressure, residual stress and clamping force and improve part surface quality...

Patents

Patents

2022

2022

Rong-Yeu Chang, Yuing Chang, Chia-Hsiang Hsu, Ting-Yu Cheng
Patent No.: US 11230044 B2
The present disclosure provides a method of producing a molded product. The method comprises steps of performing, via computer-assisted engineering simulation software, a first simulation process to generate a plurality of molding conditions comprising a default...
Rong-Yeu Chang, Chia-Hsiang Hsu, Chuan-Wei Chang
Patent No.: US 11230043 B2
A system for setting injection-molding conditions and a method for setting actual molding conditions of an injection-molding machine are disclosed. The system includes a computer and an injection-molding equipment. The computer is configured to simulate, via computer-aided...
Rong-Yeu Chang, Chia-Hsiang Hsu, Chuan-Wei Chang
Patent No.: US 11027470 B1
A system for setting injection-molding conditions and a method for setting actual molding conditions of an injection-molding machine are disclosed. The system includes a computer and an injection-molding equipment. The computer is configured to simulate, via computer-aided...
2021

2021

Huan-Chang Tseng, Rong-Yeu Chang, Chia-Hsiang Hsu
Patent No.: US 11065795 B1
The present disclosure provides a molding system for preparing an injection-molded plastic article. The molding system includes a molding machine; a mold disposed on the molding machine and having a mold cavity for being filled with a molding resin including a plurality...
Huan-Chang Tseng, Rong-Yeu Chang, Chia-Hsiang Hsu
Patent No.: US 11027470 B1
A molding system includes a molding machine having a screw, a driving motor driving the screw to move a molding resin; a mold disposed on the molding machine and connected to the barrel of the molding machine to receive the molding resin, and having a mold cavity with...
Yuing Chang, Chih-Kang Lee, Chia-Hsiang Hsu, Rong-Yeu Chang
Patent No.: US 10987844 B1
"The present disclosure provides a clamping assembly in operative connection with a mold of an injection-molding apparatus. The clamping assembly includes a fixed plate, a rear plate, a plurality of tie bars, a movable plate, a driving module, and a temperature adjuster. The rear...
Chih-Chung Hsu, You-Sheng Zhou, Rong-Yeu Chang, Chia-Hsiang Hsu
Patent No.: US 10960592 B2
A computer-implemented simulation method for use in a molding process by a computer process is disclosed. The method includes steps of specifying a simulating domain comprising a mold cavity and a barrel of an injection machine, wherein the barrel is configured to connect...
Yuan Yao, Tzu-Heng Chiu, Rong-Yeu Chang, Chua-Hsiang Hsu, Chih-Wei Wang, Shih-Po Sun, Sung-Wei Huang, Husn Yang, Tsai-Heng Tsai
Patent No.: US 10946597 B2
The present disclosure provides a measurement method for a molding system comprising an upper mold and a lower mold forming a mold cavity. The method includes applying a pressure difference to a molding resin for driving the molding resin to flow into a preform in the mold...
Yuan-Jung Chang, Rong-Yeu Chang, Chen-Chieh Wang, Chia-Hsiang Hsu
Patent No.: US 10940623 B1
The present disclosure provides a molding system for preparing molding articles. The molding system includes a molding machine; a mold disposed on the molding machine and having a mold cavity for being filled with a molding resin; a processing module configured to generate...
Huan-Chang Tseng, Rong-Yeu Chang, Chia-Hsiang Hsu
Patent No.: US 10919202 B1
The present disclosure provides a molding system for preparing injection-molded articles. The molding system includes a molding machine; a mold disposed on the molding machine and having a mold cavity for being filled with a molding resin; a processing module configured to...
树脂转移模制系统的流动特性的测量系统和测量方法
姚遠、邱子恆、張榮語、許嘉翔、王智偉、孫士博、黃松煒、楊巡、蔡在恒
Patent No.: ZL201810418824.9
本公开提供一种测量系统,应用于测量模制系统的纤维预制件的渗透率/孔隙率比值。在一些实施例中,该测量系统包括一模具、一检测装置、一树脂供应源和一计算装置。该模具包括一上模具和一下模具,其间形成一模具腔。该树脂供应源经配置以将一成型树脂输入该模具腔内的该预制...
2020

2020

Chih-Chung Hsu, Tung-Huan Su, Hsien-Sen Chiu, Chia-Hsiang Hsu, Rong-Yeu Chang
Patent No.: US 10864667 B2
A molding system comprises a mold, a molding machine, a computing apparatus, and a controller. The computing apparatus is programmed to perform a first simulation to generate a velocity distribution and a temperature distribution of the molding material in a first portion of...
Huan-Chang Tseng, Rong-Yeu Chang, Chia-Hsiang Hsu
Patent No.: US 10713402 B1
The present disclosure provides a molding system for preparing an injection-molded article. The molding system includes a molding machine; a mold disposed on the molding machine and having a mold cavity for being filled with a molding resin; a processing module configured...
Huan-Chang Tseng, Rong-Yeu Chang, Chia-Hsiang Hsu
Patent No.: US 10710285 B1
The present disclosure provides a molding system for preparing injection-molded articles. The molding system includes a molding machine; a mold disposed on the molding machine and having a mold cavity for being filled with a molding resin; a processing module configured...
Huan-Chang Tseng, Rong-Yeu Chang, Chia-Hsiang Hsu
Patent No.: US 10703030 B1
The present disclosure provides a molding system for preparing an injection-molded fiberless plastic article. The molding system includes a molding machine; a mold disposed on the molding machine; a processing module configured to generate an anisotropic viscosity...
Yuing Chang, Rong-Yeu Chang, Chia-Hsiang Hsu, Chuan-Wei Chang, Ching-Chang Chien
Patent No.: US 10562218 B2
The present disclosure provides a method for operating a molding system. The molding system includes a molding machine and a mold disposed on the molding machine, wherein the mold has a mold cavity for being filled with a molding material from the molding machine...
一种成型系统及其设定方法
張英、張榮語、許嘉翔、張權緯、簡錦昌
Patent No.: ZL201811353275.8
本公开提供一种成型系统及其设定方法。该成型系统包括一成型机及设置于该成型机的上方的一模具,该模具具有一模穴,经配置以填充来自该成型机的一成型材料。该设定方法包括:使用一预定保压程序产生一第一状态波形及一第二状态波形;基于该第一状态波形及该第二状态波形...
2019

2019

Yuing Chang, Rong-Yeu Chang, Chia-Hsiang Hsu, Chuan-Wei Chang
Patent No.: US D866566 S
CLAIM The ornamental design for a display screen with a graphical user interface, as shown and described. The FIGURE is a front view of a display screen with a graphical user interface showing our new design. The differences in grayscale of the line in the FIGURE depict...
Yuing Chang, Rong-Yeu Chang, Chia-Hsiang Hsu, De-Lung Lai
Patent No.: US 10466089 B1
The present disclosure provides a measuring apparatus including a testing module. The testing module includes: a temperature-controlling cylinder having a top opening and a bottom opening; an upper piston and a lower piston respectively seal the top opening and the bottom...
Rong-Yeu Chang, Chia-Hsiang Hsu, Huan-Chang Tseng
Patent No.: US 10427344 B1
A molding system includes a mold having a mold cavity; a molding machine configured to fill the mold cavity with a composite molding resin including a polymeric material having a plurality of fibers; a processing module connected to the molding machine; and a controller connected...
Yuing Chang, Rong-Yeu Chang, Chen-Chieh Wang, Chia-Hsiang Hsu
Patent No.: US 10422784 B2
A measuring apparatus includes a base and a testing module. The testing module is received in the base and includes a temperature-controlling bucket, a testing cylinder, and upper and lower pistons. The temperature-controlling bucket extends in a vertical direction and has a bucket...
Yuing Chang, Rong-Yeu Chang, Chia-Hsiang Hsu, Chuan-Wei Chang, Ching-Chang Chien
Patent No.: US 10384386 B2
The present disclosure provides a method for setting up a molding system, wherein the molding system includes a molding machine and a mold disposed on the molding machine, and the mold has a mold cavity to be filled with a molding resin from the molding machine...
Huan-Chang Tseng, Rong-Yeu Chang, Chia-Hsiang Hsu
Patent No.: US 10377066 B1
The present disclosure provides a molding system for preparing a fiber-reinforced thermoplastic composite article. The molding system includes: a molding machine; a mold disposed on the molding machine and having a mold cavity for being filled with a composite...
Rong-Yeu Chang, Chia-Hsiang Hsu, Huan-Chang Tseng
Patent No.: US 10201921 B1
The present disclosure provides a molding system for preparing a fiber-reinforced thermoplastic composite article. The molding system includes: a molding machine; a mold disposed on the molding machine and having a mold cavity for being filled with a composite...
Anthony J. Favaloro, Robert Byron Pipes, Huan-Chang Tseng
Patent No.: US 10201918 B1
The present disclosure provides a molding system for preparing a fiber-reinforced thermoplastic (FRT) composite article, including a molding machine; a mold disposed on the molding machine and having a mold cavity to be filled with a composite molding resin...
一種成型系統及其設定方法
張英、張榮語、許嘉翔、張權緯、簡錦昌
Patent No.: I670163
本揭露提供一種成型系統及其設定方法。該成型系統包括一成型機及設置於該成型機的上方的一模具,該模具具有一模穴,經配置以填充來自該成型機的一成型材料。該設定方法包括:使用一預定保壓程序產生一第一狀態波形及一第二狀態波形;基於該第一狀態波形及該第二狀態波形...
樹脂轉移模製系統之流動特性的測量系統和測量方法
姚遠、邱子恆、張榮語、許嘉翔、王智偉、孫士博、黃松煒、楊巡、蔡在恒
Patent No.: I670500
本揭露提供一種測量系統,應用於測量模製系統之纖維預製件的滲透率/孔隙率比值。在一些實施例中,該測量系統包括一模具、一檢測裝置、一樹脂供應源和一計算裝置。該模具包括一上模具和一下模具,其間形成一模具腔。該樹脂供應源經配置以將一成型樹脂輸入該模具腔內的...
2018

2018

Yuing Chang, Rong-Yeu Chang, Chia-Hsiang Hsu, Chuan-Wei Chang, Ching-Chang Chien
Patent No.: US 10076862 B1
A molding system includes a molding machine, a mold disposed on the molding machine and having a mold cavity to be filled with a molding resin from the molding machine, and a computing apparatus connected to the molding machine. The computing apparatus is...
Yuing Chang, Rong-Yeu Chang, Chia-Hsiang Hsu, Chuan-Wei Chang
Patent No.: US D817970 S
CLAIM The ornamental design for a display screen with animated graphical user interface for a molding process, as shown and described. The appearance of the animated user interface sequentially transitions between the images shown in FIGS. 1-7. The process or period in...
Rong-Yeu Chang, Chia-Hsiang Hsu, Huan-Chang Tseng
Patent No.: US 9919465 B1
A molding system includes a mold having a mold cavity; a molding machine configured to fill the mold cavity with a composite molding resin including a polymeric material having a plurality of fibers; a computing apparatus connected to the molding machine; and a controller...
Huan-Chang Tseng, Rong-Yeu Chang, Chia-Hsiang Hsu
Patent No.: US 9862133 B1
The present disclosure provides a method for preparing an injection-molded fiber-reinforced composite article using a molding machine controlled by a controlling module connected to the molding machine. The method performs a molding simulation executed on the controlling...
2017

2017

Yuing Chang, Rong-Yeu Chang, Chia-Hsiang Hsu, Ching-Chang Chien, Chuan-Wei Chang
Patent No.: US D790582 S
CLAIM The ornamental design for a display screen with animated graphical user interface for a molding process, as shown and described. The appearance of the animated user interface sequentially transitions between the images shown in FIGS. 1-7. The process or period in...
Yuing Chang, Rong-Yeu Chang, Chia-Hsiang Hsu, Ching-Chang Chien, Hsien-Sen Chiu
Patent No.: US 9684295
A method for operating a molding machine includes specifying a simulating domain corresponding to a genuine domain in a mold disposed on the molding machine. The method proceeds to perform a virtual molding by using a setting packing pressure profile to generate...
Yuing Chang, Rong-Yeu Chang, Chia-Hsiang Hsu, Chuan-Wei Chang
Patent No.: US D784392 S
CLAIM The ornamental design for a display screen with an animated graphical user interface, as shown and described. The appearance of the animated user interface sequentially transitions between the images shown in FIGS. 1-7. The process or period in which one image...
Huan-Chang Tseng, Rong-Yeu Chang, Chia-Hsiang Hsu
Patent No.: US 9573307
A method for preparing a fiber-reinforced composite article initially performs a trial molding by a molding machine to prepare a trial composite article of a composite molding material including a polymeric material having a plurality of fibers, wherein the trial composite article...
Yuing Chang, Rong-Yeu Chang, Chia-Hsiang Hsu, Chuan-Wei Chang, Ching-Chang Chien, Hsien-Sen Chiu
Patent No.: US 9555571
A method for operating a molding machine includes steps of specifying a simulating domain corresponding to a genuine domain in a mold disposed on the molding machine; performing a virtual molding by using an initial packing pressure profile to generate an initial state...
2011-2016

2011-2016

Tung-Huan Su, Hsien-Sen Chiu, Rong-Yeu Chang, Chia-Hsiang Hsu, Ching-Chang Chien, Chih-Chung Hsu
Patent No.: US 9409335
A molding method includes the steps of specifying a simulating domain having a resin part and a mold part, wherein the simulating domain corresponds to a genuine domain on a molding machine; setting an initial resin temperature of the resin part and an initial mold temperature...
Rong-Yeu Chang, Chia-Hsiang Hsu, Huan-Chang Tseng
Patent No.: US 9283695
A computer-implemented simulation method for use in a molding process comprises steps of specifying a simulating domain corresponding to a genuine domain in a mold disposed on a molding machine, wherein the genuine domain has a mold cavity to be filled with a fluid...
Chih-Chung Hsu, Rong-Yeu Chang, Chia-Hsiang Hsu, Tsai-Hsin Tsai
Patent No.: US 9081923 B1
A computer-implemented method for use in a molding process by a computer processor includes specifying a simulating domain having a cavity part and a runner part; setting a filling condition of the cavity part without taking into consideration the runner part, wherein the...
Huan-Chang Tseng, Rong-Yeu Chang, Chia-Hsiang Hsu
Patent No.: US 8868389 B2
A computer-implemented simulation method for use in molding process by a computer processor includes specifying a simulating domain having a mold cavity configured to connect a tube of a molding machine, creating a mesh by dividing at least part of the simulating...
Yuing Chang, Rong-Yeu Chang, Chia-Hsiang Hsu, Chuan-Wei Chang, Ching-Chang Chien, Hsien-Sen Chiu
Patent No.: US 8571828 B2
One aspect of the present invention provides a method for determining orientation of fibers in a fluid having polymer chains, characterized in that the determining of the orientation of the fibers is performed by taking into consideration an interaction between the fibers and the fluid...
Rong-Yeu Chang, Chia-Hsiang Hsu, Hsien-Sen Chiu , Shih-Po Sun, Chen-Chieh Wang, Huan-Chang Tseng
Patent No.: US 8768662 B2
A computer-implemented method and non-transitory computer medium for calculating a shrinkage of a molding product comprises a step of using a computer processor to calculate a molding pressure of a molding fluid in a molding cavity by taking into consideration an increase...
Rong-Yeu Chang, Chia-Hsiang Hsu, Huan-Chang Tseng
Patent No.: EP2679377A1
One aspect of the present invention provides a method for determining orientation of fibers in a fluid having polymer chains, characterized in that the determining of the orientation of the fibers is performed by taking into consideration an interaction between the fibers and the fluid...
Rong-Yeu Chang, Chia-Hsiang Hsu, Huan-Chang Tseng
Patent No.: EP2537661A2
One aspect of the present invention provides a method for determining orientation of fibers in a fluid having polymer chains, characterized in that the determining of the orientation of the fibers is performed by taking into consideration an interaction between the fibers and the fluid...
2005-2010

2005-2010

網格產生方法及可執行該方法之可被電腦讀取之物品
簡錦昌、李國城、劉誠勇、許嘉翔、張榮語
Patent No.: I317893
本發明提供一種網格產生方法及可執行該方法之可被電腦讀取之物品。本發明之方法包含以下步驟:針對一模型進行網格切割,以產生複數個六面體模型網格;在該模型上建立一流道;針對該流道進行網格切割,以產生複數個流道網格;修正該模型與該流道之一鄰接區之複數個流道網格...
應用於射出成型模具冷卻分析的方法
張榮語、陳玉芬、楊文賢、劉誠勇、彭軼暉、許嘉翔
Patent No.: I299129
本發明提供一種應用於射出成形模具冷卻分析的流程及方法。其中,模具包含一模穴及一模座,本發明之方法包含以下步驟:針對模穴產生複數個模穴網格;針對模座自動地產生複數個均勻的(uniform)或自調式的(adaptive)模座網格;找出複數個模穴網格與複數個模座網格間之對應關係...
自動網格產生方法
簡錦昌、劉誠勇、許嘉翔
Patent No.: I275971
本發明提供一種自動化網格產生方法,用以自動化地產生一物件之網格,以供應用於模流分析。本發明包含以下步驟:從一電腦輔助設計模型或一三角網格格式產生模擬該物件之表面網格;修飾該表面網格;產生該物件之邊界層實體網格;產生該物件之內部實體網格;改善該邊界層實體...
快速建構複數連結之立體管狀物之方法
簡錦昌、劉誠勇、許嘉翔
Patent No.: I242147
快速建構複數連結之立體管狀物之方法包括三個主要步驟:接受複數管狀物之幾何參數之輸入;利用幾何參數計算各管狀物在連結後之幾何外型;以及利用各管狀物在連結後之幾何外型計算代表立體網格之網格點。而在管狀物在連結處會有『空缺』以及管狀物重複『堆疊』之現象,本發...

Conference Papers

Conference Papers

2022

2022

A complete fiber orientation investigation of compression molding process for sheet molding compound (SMC)
Kaori Oshita, Satoshi Morita, Atsushi Kawada, Hirokuni Fujita, Masahiro Hakotani, Chun-Hsiang Wang, Chih-Chung Hsu, Hsien-Sen Chiu, Li-Yang Chang, Nai-Jen Hsiao, Kai-Yuan Wang
PPS
Compression molding is a high-volume, high-pressure method suitable for molding complex, high strength fiber glass reinforcements. Materials that are typically manufactured in compression molding are thermosetting resins with chopped glass/carbon fibers as the sheet...
Study on the correlation between the micro fiber orientation distribution and macro geometrical shrinkage changes
Jun-Zheng Wang, Chao-Tsai (CT) Huang*, Sheng-Jye Hwang, Po-Wei Huang3, Hsin-Shu Peng, Chih-Che Wu, and Chun-I Tu
PPS
The micro-structures of the fibers have been regarded as the main content to enhance the strength for fiber-reinforced plastics (FRP) products. However, the micro-structures inside plastic matrix are very complex, they are not easy to be visualized and managed. Moreover...
Study on the fiber orientation variation due to bubble effect in fiber reinforced microcellular injection molding
Le Ke, Jun-Zheng Wang, Chao-Tsai (CT) Huang, Shyh-Shin Hwang, and Rong-Yeu Chang
PPS
Due to its great functionality, the fiber reinforced thermoplastics (FRP) has been applied in industrial as one of the lightweight technologies for many years. However, the non-uniform shrinkage and warpage due to the fiber microstructure becomes one of the big challenges...
A novel equivalent model for underfill molding process on 2.2D structure for high performance applications
Yu En Liang, Chia Peng Sun, Chih Chung Hsu, Dyi Chung Hu, Er Hao Chen, Jeffrey Changbing Lee
ECTC
Different optimization methods or strategies have been proposed and utilized to enhance the quality of injected products for many years. However, what is the machine characteristics to influence the efficiency of the optimization method? It is not fully understood yet. In this study...
Discover the physical mechanism of the interface formation in co-injection molding using rheological behavior
You-Ti Rao, Kuan-Yu Ko, Chao-Tsai Huang, Chih-Chung Hsu, You-Sheng Zhou, David Hsu, Rong-Yue Chang, and Shi-Chang Tseng
ANTEC
Co-injection molding has been introduced into industrial application for several decades. However, due to the formation of the interface between skin and core materials is very difficult to be observed, and controlled, a good quality of co-injection product can not be obtained...
Study on machine identification and its effect on the rsm optimization in injection molding
Rui-Ting Xu, Tsung-Han Wang, Chao-Tsai (CT) Huang, Po-Hsuan Chen, Wen-Ren Jong, Shia-Chung Chen, David Hsu and Rong-Yeu Chang
ANTEC
Different optimization methods or strategies have been proposed and utilized to enhance the quality of injected products for many years. However, what is the machine characteristics to influence the efficiency of the optimization method? It is not fully understood yet. In this study...
Experiment and simulation of 1D flow and in-plane permeability validation considering fabrics orientation effects in resin transfer molding
Yu-Ho Chen, Yi-Kai Kao, Chen-Chieh Wang, Hsun Yang, Yuan Yao, Chia-Hsiang Hsu Rong-Yeu Chang
ANTEC
The main target for Design for Manufacturing and Assembly (DFMA) is to integrate multiple components with multiple functions to minimize cost and efforts. In addition, a family mold system has been utilized in industrial manufacturing to make a series integrated components...
2021

2021

Thermal-flow simulation for heating module of thermoplastic pvt instrument
Shi-Chang Tseng, Shyang-Jye Chang, Li Fang, Chia-Kai Chang, Jian-He Liao, Jen-Jye Wang, De-Long Lai
模具公會
Due to the production development, for the quality and stability of plastics have higher requirements, the traditional method for improving quality mainly depends on experience to adjust and optimize controlling technology and injection molding parameters. There’s no...
Study on the dynamic behavior of skin/core interface and its quantification in co-injection molding
Kuan-Yu Ko, Chao-Tsai (CT) Huang, You-Ti Rao, Gwo-Geng Lin, Chih-Chung Hsu, Tim Chou, David Hsu, and Shi-Chang Tseng
模具公會
The co-injection molding process has been widely used in daily life or in many industries. Its characteristic is to combine different color or different materials to make the skin and core structure products, such as: uniquely designed furniture (for example: Lattoflex's Winx300...
3D numerical simulation and experimental observation of bubble growth and shrinkage in nitrogen-gas saturated molten polymer for the foam molding process
Cheng-Hong Pai, Li-Yang Chang, Chih-Chung Hsu
模具公會
The foam injection molding method is popular in various industries by its superior physical properties e.g., low thermal conductivity, low relative density, good shock absorbance, low dielectric transmission loss, and good sound absorption than solid plastics. These superior...
Organic package warpage predictive modelling methodologies
Kang Eu Ong , Wei Keat Loh , Philip Chang , Arvind Purushotaman , Tatsuro Yoshida , Kei Murayama , Makoto Tsukahara , Ron W. Kulterman , Haley Fu
IMPACT
The present study focuses on organic package warpage modeling with copper wiring filled with different polymer materials for Core and Build Up. A modeling methodology using trace mapped model along with viscoelastic and PVTC material models were used to predict package...
Study on the quantification of the advancement of core material in co-injection molding products
Kuan-Yu Ko , Chao-Tsai (CT) Huang , Chih-Chung Hsu , You-Sheng Zhou , David Hsu , and Shi-Chang Tseng
ANTEC
Co-injection molding has been developed for decades. However, due to too many factors which can affect its processing, it is very difficult to obtain good quality of coinjected products all the time. One of the major challenges is that the prediction and management of the advancement...
3D numerical simulation and experimental observation of bubble growth and collapse in nitrogen-gases
Kentaro Taki, Allen Peng, Barry Pai, Grace Chang, Robert Chang, Jim Hsu, Hideo Akimoto, Hisahiro Tanaka
ANTEC
Co-injection molding has been developed for decades. However, due to too many factors which can affect its processing, it is very difficult to obtain good quality of coinjected products all the time. One of the major challenges is that the prediction and management of the advancement...
Study on the flow-fiber couling and its influence on the shrinkage of frp injection parts
Cheng-Hong Lai, Chao-Tsai (CT) Huang, Jia-Hao Chu ,Wei-Wen Fu, Sheng-Jye Hwang, Hsin-Shu Peng, Chih-Che Wu, and Chun-I Tu
ANTEC
The fiber-reinforced plastics (FRP) material has been applied into industry as one of the major lightweight technologies, especially for automotive or aerospace products. The reason why fibers can enhance plastics is because of their microstructures. One of those microstructures...
Viscous heating correction for shear viscosity of polymer mets in capillary rheometry
Yu-Ho Wen, Chen-Chieh Wang, Chia-Hsiang Hsu, and Rong-Yeu Chang
ANTEC
The fiber-reinforced plastics (FRP) material has been applied into industry as one of the major lightweight technologies, especially for automotive or aerospace products. The reason why fibers can enhance plastics is because of their microstructures. One of those microstructures...
Investigate on the degree of assembly for components in an injection family mold system
Tsai-Wen Lin, Chao-Tsai (CT) Huang, Wen-Ren Jong , and, Shia-Chung Chen
ANTEC
Co-injection molding has been introduced into industrial application for several decades. However, due to the formation of the interface between skin and core materials is very difficult to be observed, and controlled, a good quality of co-injection product can not be obtained...
On the development of a mold with conformal cooling channel for metal injection molding
Wei-Chen Zhou, Pei-Bo Sung, Yao-Chen Tsai, Jian-Hong Lin, Chia-Hsiang Hsu, Jiing-Yih Lai
模具公會
Conventional 2D cooling channels may not be easy to deal with the problem of non-uniform temperature distribution for multi-cavity molds in metal injection molding, and may cause shaping defects of the product. We develop an integrated technology for the MIM product...
2020

2020

Advanced simulation methods for prediction of multi-layer non-matching fiber mat applications in resin transfer molding process
Hsun Yang, Chih-Chung Hsu, Chia-Hsiang Hsu, and Rong-Yeu Chang
ANTEC
The objective of this study is to use a simulation tool of resin transfer molding (RTM) process to get a comprehensive understanding of the permeability measuring process. In order to verify the simulation tool’s capability to simulate oil flow in non-matching fabric we build the mesh...
A valid design prediction approach of 3D metal-printed mold manufacturing
Po-Chieh Huang, Chian-Hsiang Lin, Chong-Bin Yang, Wen-Hsin Weng, Wen-Yang Peng and Alan Liao
ANTEC
The objective of this study is to use a simulation tool of resin transfer molding (RTM) process to get a comprehensive understanding of the permeability measuring process. In order to verify the simulation tool’s capability to simulate oil flow in non-matching fabric we build the mesh...
The advanced study of hybrid molding by CAE simulation
Che-Ping Lin
ANTEC
In this automotive power supply test-seat assembly case, the development process combines injection molding simulation, 3D metal printing technology and real experiments to demonstrate an effective mold development approach. Simulation-driven conformal cooling design...
Viscoelastic measurement and injection molding simulation of amorphous polymer: from liquid to solid state
Chen-Chieh Wang, Rong-Yeu Chang
ANTEC
Hybrid Molding is an emerging molding technology that is used in composite products. It has integrated molding characteristics, which can integrate multi-step process, save cost, reduce cycle time and make the product multifunctional. However, it is very hard to know what...
3D chemical foaming simulation for transfer molding process
Li-Yang Changa, Chen-Chieh Wanga, Chih-Chung Hsua, Chia-Hsiang Hsua
ANTEC
The viscoelastic properties under wide temperature range (from viscous to glassy state) and various flow field are studied in this work for a commercial amorphous polymer. It is found that multi-mode EPTT model can describe all measured properties well including dynamic...
The challenge of simulation for ear-flow phenomenon in injection-mold filling
Huan-Chang Tseng
ANTEC
This study presents the recent development of threedimensional prediction of cross-linked ethylene propylene diene monomer rubber (EPDM) with chemical blowing agent azodicarbonamide (ADCA) in transfer molding process. Plunger retraction is applied after...
Jenn An Wang, Ong. Kang Eu, Weng Hsin Weng, Chih Chung Hsu, Wei Keat Loh, Ron W. Kulterman, Haley Fu
IMPACT
In the past, the Dihn-Armstrong flow-fiber coupling model has been demonstrated to only be relevant in semi-concentrated fiber suspensions. However, the broader core of fiber orientation distribution induced by the plug flow velocity profile for high fiber concentrations cannot be...
Before 2020

Cited Articles

Cited Articles

2022

2022

Dongyou Huang, Hesheng Liu, Tangqing Kuang,  and Zhong Yu
Advances in Polymer Technology

2018

2018

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