Injection Molding Simulation of Gate Arrangement Selection for Avoiding Short Shot Problem in Blade Edge of Fan Guard Frame of Air Conditioner

2018 ◽  
Vol 23 (3) ◽  
pp. 256-264
Author(s):  
Tae Ho Yoon ◽  
Hoyoon Kim ◽  
Jaesung Kim
Keyword(s):  
Injection Molding ◽  
Air Conditioner ◽  
Blade Edge ◽  
Injection Molding Simulation ◽  
Selection For ◽  
Short Shot

Key Technologies Research on Color Contour Map of 3D Injection Molding Simulation Results

2012 ◽  
Vol 217-219 ◽  
pp. 1998-2001
Author(s):  
Tie Geng ◽  
Qing Hai Ren ◽  
Wei Qing Tu ◽  
Dan Dan Liu
Keyword(s):  
Injection Molding ◽  
Color Image ◽  
Three Dimensional ◽  
Physical Field ◽  
Contour Map ◽  
Image Rendering ◽  
Color Range ◽  
Key Technologies ◽  
Injection Molding Simulation ◽  
Simulation Results

According to the color contour map of the 3D injection molding simulation results, the commonly used color contour map drawing algorithm was researched, and a three-dimensional color image rendering algorithm which based on the "physical field values and color range mapping" was given too. And the key technologies of the algorithm which was used to draw 3D color contour map were introduced in detail. In the end, an example was given.

The Use of Advanced Aluminum Alloys for Enhanced Productivity in Plastic Injection Molding

2000 ◽  
Author(s):  
Jim Nerone ◽  
Karthik Ramani
Keyword(s):  
Aluminum Alloys ◽  
Injection Molding ◽  
Wall Thickness ◽  
Simulation Software ◽  
Cooling Time ◽  
Coolant Temperature ◽  
Steel Mold ◽  
Cooling Channels ◽  
Injection Molding Simulation ◽  
Increased Strength

Abstract New aluminum alloys, QC-7® and QE-7®, have thermal conductivities four times greater than traditional tool steels, and have significantly increased strength and hardness compared to traditional aluminum materials. Molds were constructed of P-20 tool steel and QE-7® aluminum and were used to provide experimental data regarding thermal mold characteristic and confirm injection molding simulation predictions using C-Mold®. The relationships between cooling time reduction (using aluminum alloys) and polymer type, cooling channel depth, part wall thickness, and coolant temperature were explored both experimentally and using simulation software. It was shown that the potential reduction in cooling time varied from 5% to 25%. The most significant percentage improvements were observed in parts with part wall thickness of 0.05″ to 0.10″ and in molds with cooling channels at a depth ratio (D/d) of 2.0. The thermal pulses in the steel mold 0.10″ from the surface were approximately 63% larger than in aluminum mold.

THERMAL ANALISIS INJECTION MOLDING PADA COVER AIR FLOW TERHADAP SHORT MOLD DEFECT

2021 ◽  
Vol 26 (2) ◽  
pp. 103-110
Author(s):  
Muhammad Yusuf Nurfani ◽  
Irvan Septyan Mulyana
Keyword(s):  
Injection Molding ◽  
Air Flow ◽  
Cooling Time ◽  
Short Shot

Plastik Injection Molding (PIM) merupakan proses produksi pembentukan material plastik dari material resin berbentuk butiran yang digunakan dalam membuat suatu komponen manufaktur. Defect atau kecacatan yang umumnya terjadi pada plastik injection molding yaitu short mold yaitu kondisi dimana part yang dihasilkan tidak terisi material plastik secara sempurna. Pada penelitian membahas tentang analisa panas pada cover air flow terhadap short mold defect. Metode yang digunakan adalah metode perhitungan actual dan analisa aktual terhadap part injection kemudian membandingkan hasil dari variasi suhu. Material yang digunakan dalam penelitian ini adalah Polypropylene (PP) dengan grade M560 yang dimasukan kedalam injection molding dengan tekanan 96 Mpa. Suhu yang akan dianalisis yaitu 130̊C dengan cooling time 15 second , suhu 150̊C cooling time 19 second dan suhu 170̊C cooling time 23 second. pada barrel. Hasil penelitian ini menunjukan temperatur 170̊C dengan cooling time 23 detik dapat mengatasi masalah short shot pada cover air flow pada saat proses injection part.

Optimization of fiber prediction model coefficients in injection molding simulation based on micro computed tomography

2018 ◽  
Vol 59 (s2) ◽  
pp. E152-E160 ◽  
Author(s):  
Matthias Morak ◽  
Daniel Tscharnuter ◽  
Thomas Lucyshyn ◽  
Wolfram Hahn ◽  
Michael Göttlinger ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Injection Molding ◽  
Prediction Model ◽  
Micro Computed Tomography ◽  
Simulation Based ◽  
Injection Molding Simulation

Creating material data for thermoset injection molding simulation process

2019 ◽  
Vol 73 ◽  
pp. 284-292
Author(s):  
Ngoc Tu Tran ◽  
Michael Gehde
Keyword(s):  
Injection Molding ◽  
Material Data ◽  
Simulation Process ◽  
Injection Molding Simulation

Development of High Efficiency and Low Noise Cross-Flow Fans for Room Air Conditioner Indoor Unit

2014 ◽  
Author(s):  
Hironobu Yamakawa
Keyword(s):  
High Efficiency ◽  
Length Distribution ◽  
Cross Flow ◽  
Low Noise ◽  
Navier Stokes ◽  
Outer Diameter ◽  
Air Conditioner ◽  
Blade Edge ◽  
Sinusoidal Shape ◽  
Cross Flow Fan

Cross flow fans are used for fan systems in a household room air conditioner indoor unit. In recently, in the view of environmental problem and cost saving, energy saving performance is important specification for users. Reducing fan motor electric power consumption is effective for this purpose. And also low noise fans are needed for comfortable circumferences. To meet these user needs, we developed a high efficiency and silent cross flow fan using CFD (Computational Fluid Dynamics) and experiments. In CFD, numerical model is calculated by commercial software using steady state, Reynolds-averaged Navier-Stokes (RANS) and k-ε turbulent flow model. The developed cross flow fan is geometrically characterized by the solidity (the ratio of the blade pitch and blade cord length) distribution, and the blade edge shape. The solidity average of developed fan was larger than the conventional fan and the solidity distribution was smooth. And the developed fan has the sinusoidal shape of the outer diameter edge. This sinusoidal shape edge makes pressure distribution on the tongue to be more dispersed compare to that of conventional straight edge so that tonal noise was restrained.

Gate Location Optimization in Injection Molding Processing

2000 ◽  
Author(s):  
Baojiu Lin ◽  
Won Gil Ryim
Keyword(s):  
Injection Molding ◽  
Simulation Software ◽  
Innovative Technology ◽  
Software Module ◽  
Location Optimization ◽  
Gate Location ◽  
Part Quality ◽  
Design Cycle ◽  
Injection Molding Simulation ◽  
Complex Models

Abstract Improvements in part quality and cost reduction are the primary objectives of CAE use in the injection molding industry. Engineers use advanced injection molding simulation software to analyze and verify their part designs. Traditionally, engineers have had to rerun simulations to verify the effects of changes in gate locations. For complex models, simulations are very time consuming. To reduce the design cycle time, a Design Optimization Module is developed by C-MOLD. One of the functions of this new software module is to automatically select optimal gate locations. This innovative technology is the result of close R&D collaboration between C-MOLD and LG-PRC in Korea. An overview of gate location optimization technology is presented in this paper, and several examples are also presented as illustration.

scholarly journals Tie-Bar Elongation Based Filling-To-Packing Switchover Control and Prediction of Injection Molding Quality

Polymers ◽  
2019 ◽  
Vol 11 (7) ◽  
pp. 1168 ◽  
Author(s):  
Jian-Yu Chen ◽  
Chun-Ying Liu ◽  
Ming-Shyan Huang
Keyword(s):  
Injection Molding ◽  
Pressure Sensors ◽  
Clamping Force ◽  
Cavity Pressure ◽  
Testing Specimen ◽  
Injection Speed ◽  
Novel Approach ◽  
Pressure Profiles ◽  
Molded Parts ◽  
Short Shot

Filling-to-packing switchover (also called V/P switchover) is critical for assuring injection molding quality. An improper V/P switchover setting may result in various defects of injection-molded parts, such as excessive residual stress, flash, short shot, and warpage, etc. To enhance a consistent molding quality, recent V/P switchover approaches adopt cavity pressure profiles requiring sensors embedded in mold cavities, which is invasive to mold cavities and more expensive. Instead of using cavity pressure sensors, by working with the most popular screw position switchover control, this study hereby proposes a novel approach of tuning V/P switchover timing using a tie-bar elongation profile. In this investigation, a dumbbell testing specimen mold is applied to verify the feasibility of the method proposed. The results show that the mold filling and packing stages can be observed along the tie-bar elongation profile, detected by mounting strain gauges on the tie bars. Also, the characteristics of the cavity pressure are similar to those of the tie-bar elongation profile under a proper clamping force condition. Moreover, the varying process parameter settings which include injection speed, V/P switchover point, and holding pressure, can be reflected in these profiles. By extracting their characteristics, the application of the V/P switchover is proved to be realistic. This research conducted an experiment to verify the proposed V/P switchover decision method based on the tie-bar elongation profile. The result showed that the fluctuation of the part’s weight corresponding to a slight change of the barrel’s temperature from 210 °C to 215 °C can be successfully controlled with this method. Besides, the maximum clamping force increment extracted from the tie-bar elongation profile was found to be a good indicator for online monitoring of the reground material variation.

The Injection Molding Simulation of Lever Cam Ass’y Using High-Functional Polymer

2007 ◽  
pp. 1007-1010
Author(s):  
Chang Su Hahn ◽  
Sang Ho Noh ◽  
Dong Ok Kim ◽  
Yong Mun Ryu ◽  
Beom Suck Han
Keyword(s):  
Injection Molding ◽  
Functional Polymer ◽  
Injection Molding Simulation
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