Analysis and Modifying of Injection-Mold for Notebook Computer Housing by CAE

2010 ◽  
Vol 426-427 ◽  
pp. 568-571
Author(s):  
Bai Liu ◽  
X.J. Liu ◽  
Long Liao ◽  
Y.B. Du
Keyword(s):  
Injection Molding ◽  
Color Variation ◽  
Mold Design ◽  
Injection Mold ◽  
Cooling Period ◽  
Notebook Computer ◽  
Filling Analysis ◽  
Cae Analysis ◽  
Sink Mark ◽  
Application Prospects

In the paper, C-Mold software was applied to the analysis of injecting molding of the notebook computer housing so as to solve the main problems of warpage and injection unbalance of the product. According to the results of filling analysis, the problem has been found out and the mold design has been improved. The described case showed the capability of CAE to find the reasons that cause warpage, duration of cooling period, sink mark, blush, color variation and shrinkage directly or indirectly. Thus, CAE analysis has a wide application prospects in injection molding.

Optimal Layout and Sizing of Ejector Pins for Injection Mold Design

1998 ◽  
Author(s):  
Seongjoon Kwak ◽  
Kunwoo Lee
Keyword(s):  
Wavelet Transform ◽  
Injection Molding ◽  
Mold Design ◽  
Injection Mold ◽  
Optimal Layout ◽  
Rule Based ◽  
Rule Based System ◽  
Molded Part ◽  
Injection Mold Design ◽  
Local Stresses

Abstract Injection molding is the most prevalent technology used for processing thermoplastic polymers. At the end of the injection molding cycle, the plastic molded part should be ejected when the injection mold opens. Complex moldings with bosses, ribs, or other features are generally ejected by ejector pins because they are economical and easy to be installed. However, the ejector pins can cause high local stresses and strains in the molding at the stage of ejection leading to the part deformation and damage. This paper proposes a method to determine the layout and size of the ejector pins required to eject thermoplastic moldings with minimizing the part deformation and damage. The proposed method calculates the distribution of the necessary ejecting forces to overcome the friction between the part and its mold. Then, it transforms the ejecting forces into a certain number of representative forces by the wavelet transform. Finally, we can get the location and size of the ejector pins corresponding to the discrete ejecting forces with the help of a rule-based system. The proposed method helps an injection mold designer to systematically obtain an optimum ejector design.

Design and fabrication of multi-cavity injection mold using hot runners and direct edge gates

2014 ◽  
Vol 228 (15) ◽  
pp. 2790-2798 ◽  
Author(s):  
Tae-Il Seo ◽  
Byeong-Uk Song ◽  
Jeong-Won Lee
Keyword(s):  
Mold Design ◽  
Injection Mold ◽  
Cooling Channel ◽  
Direct Edge ◽  
Injection Mold Design ◽  
Computer Aided ◽  
Structural Differences ◽  
Filling Analysis ◽  
Cavity Cooling ◽  
Plastic Injection

A hot runner system can provide many advantages to plastic injection mold engineers for improving product quality. In edge gate systems in particular, the gate traces can appear on the side of products rather than the top. However, it is difficult to establish hot runner systems using edge gates because of their structural differences from conventional gate systems. This article presents the entire process of preparing a 48-cavity plastic injection molding system with edge gates. This process consists of 48-cavity injection mold design, structural analysis, verification of design plans, filling analysis of multi-cavity, cooling channel design on the basis of cooling analysis, fabrication of the mold system, and test injection. All presented computer-aided engineering analyses were conducted using ANSYS and MoldFlow.

Numerical Simulation and Balance Design of Rubber Injection Mold Gating System Based on POLYFLOW

2012 ◽  
Vol 501 ◽  
pp. 190-195
Author(s):  
Lian Shuai Chen ◽  
Hui Min Zhang ◽  
Jia Teng Niu
Keyword(s):  
Numerical Simulation ◽  
Injection Molding ◽  
Injection Velocity ◽  
Mold Design ◽  
Injection Mold ◽  
Gating System ◽  
Processing Parameter ◽  
Inlet Flow ◽  
Injection Mold Design ◽  
Runner Design

Rubber injection molding is applied in more and more applications in rubber production process. Design of gating system is the most important in rubber injection mold design. Poor runner design will lead to uneven injection velocity and pressure which affect the size and shape and the quality of the rubber products. This paper first adopted POLYFLOW numerical simulation. Three different inlet flow rates for multi-cavity mold were simulated and analyzed by POLYFLOW software in this paper. Non-equilibrium gating system was further optimized by the calculation method of Balanced Gate Value and numerical simulation. The best inlet flow rate and the best runner size were ultimately obtained. It was proven that Numerical simulation results are of great significance for rubber injection mold design and injection molding processing parameter selection.

Research on General Model of Hot Runner Mould for Transparent and Complex Plastic Knobs

2009 ◽  
Author(s):  
Xiaohong Ge ◽  
Shaolan Wu ◽  
Hui Li ◽  
Hongwu Huang
Keyword(s):  
Injection Molding ◽  
Product Quality ◽  
General Model ◽  
Extrusion Process ◽  
Injection Mold ◽  
High Quality ◽  
Beryllium Copper ◽  
Manufacturing Efficiency ◽  
Cae Analysis

In order to improve the manufacturing efficiency and product quality of transparent and complex plastic knobs, a hot runner injection mold is introduced in this paper. Based on a shared hot runner system and a module combination of the mold holders, inserts and the beryllium-copper cored cooling components, an effective general model for hot runner injection molding is developed. The beryllium copper insert extrusion process is employed to copy with the requirements of great variety, high quality, low price and short producing cycle for knob products. The results of CAE analysis and production validation for typical knobs and insert extrusion process demonstrate the effectiveness of the newly developed hot runner injection molding and that the product quality fulfill the requirements of real manufacturing process.

Design of Headphone Shell Injection Mold Based on Pro/E

2013 ◽  
Vol 816-817 ◽  
pp. 307-310
Author(s):  
Yue Feng Li
Keyword(s):  
Injection Molding ◽  
Theoretical Basis ◽  
Mold Design ◽  
Manufacturing Cost ◽  
Injection Mold ◽  
Customer Requirements ◽  
Plastic Injection

This article studies headphone shell injection molding crafts analysis and mold design. According to mold structure crafts characteristics and customer requirements, we find out the best location of plastic injection, rational arrangement of the shunt and reasonable side core-pulling mechanism by using Pro/E, which simplifies mold structure, reduces mold manufacturing cost and provides a strong theoretical basis for the rationality of mold design.

The Optimal Design of Injection Mold Gate Based on CAE

2013 ◽  
Vol 690-693 ◽  
pp. 2772-2775
Author(s):  
Jian Wen Tang
Keyword(s):  
Optimal Design ◽  
Injection Molding ◽  
Traditional Method ◽  
Injection Molding Process ◽  
Mold Design ◽  
Injection Mold ◽  
Molding Process ◽  
Design And Manufacturing ◽  
The Cost ◽  
Cae Technology

In the injection molding process, CAE technology is used for detailed analysis of the designing of injection mold gate location and number, this method can optimize the pouring system, and change the traditional method which improves the mold structure by mold testing, so the cost of mold design and manufacturing can be reduced.

Design of Injection Mold and Research of Process for Plastic Parts Based on CAE Analysis

2016 ◽  
Vol 717 ◽  
pp. 122-127
Author(s):  
Dong Mei Jiao ◽  
Fang Deng ◽  
Wei Min Yang
Keyword(s):  
Flow Analysis ◽  
Mold Design ◽  
Injection Mold ◽  
Development Cycle ◽  
Cae Analysis ◽  
Plastic Parts ◽  
Cae Technology ◽  
Mold Flow ◽  
Improve Mold

The injection molding of plastic parts was simulated and analyzed by MOLDFLOW. Based on the result of mold flow analysis, we can optimize the structure of the mold, select equipment, determine parameters of process, and predict potential defects. The CAE technology could improve mold design ability, shorten plastic parts development cycle, improve the quality of plastic parts, reduce costs, and strengthen competitive power.

The Fast Design and the Optimization of the Injection Mold Based on CAD and CAE Technology

2012 ◽  
Vol 430-432 ◽  
pp. 1352-1356
Author(s):  
Heng Tan ◽  
Ze Wang ◽  
Guo Hong Dai ◽  
Xiu Xiang Chen ◽  
Jian Fu Zhu
Keyword(s):  
Injection Molding ◽  
Reverse Engineering ◽  
Characteristic Curve ◽  
3D Models ◽  
Mold Design ◽  
Injection Mold ◽  
Plastic Model ◽  
Cloud Data ◽  
Engineering Software ◽  
Cae Technology

Using the reverse engineering software “Imageware”, the kakou points cloud data were processed, the characteristic curve grids were divided and the curve surfaces were reconstructed in the paper. Then the reconstructed plastic model of the kakou was inputed in UG. With the help of the repair functions for UG software, the incontinuous curve surfaces were sew up, then the STL style of the kakou was saved. Using Mold Wizards of the UG, the assemble model of the mold was established, the parting surfaces were designed, the 3D models of the mold parts were acquired. With the help of Moldflow, the injection molding of the kakou was simulated and analyzed. According to the results of simulation, the structures of mold and the technology parameters were optimized .The mold design was changed digital, virtual and modern design from tradition design based on paper and experience.

scholarly journals Influence of mold design and injection parameters on warpage deformation of thin-walled plastic parts

Polimery ◽  
2021 ◽  
Vol 66 (5) ◽  
pp. 283-292
Author(s):  
Bo Wang ◽  
Anjiang Cai
Keyword(s):  
Injection Molding ◽  
Process Parameters ◽  
Mold Design ◽  
Injection Mold ◽  
Injection Process ◽  
Injection Parameters ◽  
Injection Mold Design ◽  
Thin Walled ◽  
Warpage Deformation ◽  
Plastic Parts

Thin-walled plastic parts are susceptible to deformation during injection molding. Using the example of a notebook battery cover, optimization of the injection mold design and injection process parameters was performed with Moldflow software, which resulted in about 69% reduction of the deformations. Moreover, the uneven material shrinkage during the injection process has been shown to be the main cause of deformations of thin-walled plastic parts.

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