Injection Molding Flow Simulation of Thin-Walled Slender Tube and Optimization of Combined Cavity

2010 ◽  
Vol 37-38 ◽  
pp. 559-563
Author(s):  
Jun Liu ◽  
Gang Ming Wang ◽  
Bao Shou Sun
Keyword(s):  
Injection Molding ◽  
Cooling System ◽  
Process Analysis ◽  
Flow Simulation ◽  
Manufacturing Cost ◽  
Modeling Technology ◽  
Injection Process ◽  
Thin Walled ◽  
Short Shot ◽  
Molding Flow

Thin-walled slender tubes are produced by injection molding, where there might be defects such as short shot, excessive warpage and uneven temperature distribution. In this paper, injection process analysis was carried out. The 3D modeling technology of Pro/E established a solid model of thin-walled slender tube. MPI (Moldflow Plastics Insight) was used for executing injection molding flow simulation. Gate location and gate number was optimized. Filling system and cooling system of the combined cavity was optimized by analysis of flow, cool and warp. The results can be used for supplying reliable data of mold designing and manufacturing, reducing the engineering mold trial time, decrease the manufacturing cost. The configuration and dimensions of the injection gate can be determined by the computer program before the molds are actually manufactured. The potential defects were forecasted. Therefore, the designers can quickly optimize the mold design.

scholarly journals An Assessment of Thermoset Injection Molding for Thin-Walled Conformal Encapsulation of Board-Level Electronic Packages

2019 ◽  
Vol 3 (1) ◽  
pp. 18 ◽  
Author(s):  
Romit Kulkarni ◽  
Peter Wappler ◽  
Mahdi Soltani ◽  
Mehmet Haybat ◽  
Thomas Guenther ◽  
...  
Keyword(s):  
Injection Molding ◽  
Manufacturing Industry ◽  
Mechanical Stability ◽  
Flow Simulation ◽  
Dust Particles ◽  
Injection Molding Process ◽  
Market Demand ◽  
Molding Process ◽  
Thin Walled ◽  
Board Level

An ever-growing market demand for board (second) level packages (e.g., embedded systems, system-on-a-chip, etc.) poses newer challenges for its manufacturing industry in terms of competitive pricing, higher reliability, and overall dimensions. Such packages are encapsulated for various reasons including thermal management, protection from environmental conditions and dust particles, and enhancing the mechanical stability. In the due course of reducing overall sizes and material saving, an encapsulation as thin as possible imposes its own significance. Such a thin-walled conformal encapsulation serves as an added advantage by reducing the thermo-mechanical stresses occurring due to thermal-cyclic loading, compared to block-sized or thicker encapsulations. This paper assesses the encapsulation process of a board-level package by means of thermoset injection molding. Various aspects reviewed in this paper include the conception of a demonstrator, investigation of the flow simulation of the injection molding process, execution of molding trials with different encapsulation thicknesses, and characterization of the packages. The process shows a high dependence on the substrate properties, injection molding process parameters, device mounting tolerances, and device geometry tolerances. Nevertheless, the thermoset injection molding process is suitable for the encapsulation of board-level packages limiting itself only with respect to the thickness of the encapsulation material, which depends on other external aforementioned factors.

Analysis and Optimization on Injection Molding Process of Double Helical Gear Based on Moldflow

2015 ◽  
Vol 1096 ◽  
pp. 376-380
Author(s):  
Chang Yong Jiang ◽  
Hong Lei Shen
Keyword(s):  
Numerical Simulation ◽  
Injection Molding ◽  
Simulation Analysis ◽  
Cooling System ◽  
Process Analysis ◽  
Electrical Equipment ◽  
Helical Gear ◽  
Injection Molding Process ◽  
Feed System ◽  
Molding Process

In view of a kind of a plastic double helical gear in some office electrical equipment, injection molding process analysis was done, by means of Moldflow,to create feed system and cooling system for Moldflow analysis of helical gear, to make numerical simulation analysis, verification and optimization of injection molding process, to obtain some major parameters such as temperature, pressure and time to meet molding requirements of injection molding process of double helical gear.

scholarly journals Precision Mold of Prototype Titanium Orthopedic Implant using Metal Injection Molding Approach

2020 ◽  
Vol 11 (3) ◽  
pp. 487-495
Author(s):  
Haruman Wiranegara ◽  
◽  
Muhammad Nauval Fauzi ◽  
Shinta Virdhian
Keyword(s):  
Injection Molding ◽  
Raw Materials ◽  
Flow Simulation ◽  
Orthopedic Implants ◽  
Design Flow ◽  
Metal Injection Molding ◽  
Injection Process ◽  
Literature Reviews ◽  
Develop Technology ◽  
Feedstock Material

MIDC’s researchers in fulfilling Industry Development Programme have taken a step to develop technology in the design application of orthopedic implants to help suppress the rate of imported medical devices in Indonesia. This research objective was to make a prototype plate for a jawbone connector that meets the geometric specifications with the metal injection molding approach. The jawbone connector plate has a very small size of about 2 mm x 20 mm x 0.5 mm that needs precision mold with certain geometric specifications. MIM approach was used, from the literature reviews that show MIM is the appropriate process for manufacturing implants. The phases of MIM were done according to the standard reference which is making raw materials or feedstock, gatting system design, flow simulation, precision mold producing, mold testing, injection process, debinding, sintering, and mechanical product testing. The results of this study were precision molds with several variants and were test using plastic polypropylene to see the performance of the mold. The researchers then produce the jawbone connector implant using feedstock material. The test result conducted in MIDC successfully shows that the mold can produce shapes that match the required geometry.

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.

Effect of cooling system on the polymer temperature and solidification during injection molding

2009 ◽  
Vol 29 (8-9) ◽  
pp. 1786-1791 ◽  
Author(s):  
Hamdy Hassan ◽  
Nicolas Regnier ◽  
Cedric Lebot ◽  
Cyril Pujos ◽  
Guy Defaye
Keyword(s):  
Injection Molding ◽  
Cooling System

Computer Simulation of an Engine Environmental Control System

2013 ◽  
Vol 850-851 ◽  
pp. 355-358
Author(s):  
Dong Du
Keyword(s):  
Control System ◽  
Distribution System ◽  
Environmental Control ◽  
Cooling System ◽  
Flow Simulation ◽  
Aircraft Engine ◽  
Simulation Software ◽  
Temperature Decrease ◽  
Environmental System ◽  
Passenger Aircraft

This paper describes the use of Fluid Flow Simulation Software to model a passenger aircraft engine environmental control system. The analysis simulates the cooling pack and the engine distribution system in a single model.The engine environmental system is very important for engine working efficiently. Using AMEsim software to simulate the cooling system can make it easily and clearly. The influence of the heat component and the fan operating is studied also. Through the analysis of the cooling system, we know that with the help of fan, the system can get additional air in the radiator and make the temperature decrease consequently.

Numerical Simulation Study on Thermal-Hydraulic Performances of Vehicular Radiator Heat Transfer Units

2012 ◽  
Vol 538-541 ◽  
pp. 2061-2066
Author(s):  
Yang Zheng ◽  
Bao Lan Xiao ◽  
Wei Ming Wu ◽  
Xiao Li Yu ◽  
Guo Dong Lu
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
Cooling System ◽  
Experimental Testing ◽  
Orthogonal Experiment ◽  
Simulation Method ◽  
Manufacturing Cost ◽  
Performance Simulation ◽  
Factor Study ◽  
Testing Cost

A radiator is one of the most important components in vehicular cooling system whose excellent fluid flow and heat transfer characteristics guarantees the engine operations. The calculation workload for performance simulation of a whole radiator is too huge due to its size. Experimental study is the conventional method to study radiator performance. This paper put forward a numerical simulation method and radiator heat transfer units were taken as study objects. Orthogonal experiment method was adopted to arrange multi-factor and multi-level calculation schemes. 23 samples with different fin parameters were simulated to investigate their thermal-hydraulic performances. Compared with experimental testing, this method greatly reduced sample manufacturing cost and testing cost, and offered data support for the effect factor study of radiator heat transfer units.

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.

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