Experimental and simulation study on the optimum of the geometrical quality of bi-convex and bi-concave lenses produced by injection molding process

2018 ◽  
Vol 41 (1) ◽  
Author(s):  
H. Barghikar ◽  
P. Mosaddegh
Keyword(s):  
Injection Molding ◽  
Simulation Study ◽  
Injection Molding Process ◽  
Molding Process ◽  
Geometrical Quality

scholarly journals Holding Pressure and Its Influence on Quality in PIM Technology

10.14311/1608 ◽  
2012 ◽  
Vol 52 (4) ◽  
Author(s):  
Pavel Petera
Keyword(s):  
Phase Separation ◽  
Injection Molding ◽  
Density Measurement ◽  
Powder Injection Molding ◽  
New Method ◽  
Powder Injection ◽  
Injection Molding Process ◽  
Molding Process

The PIM (powder injection molding) process consists of several steps in which faults can occur. The quality of the part that is produced usually cannot be seen until the end of the process. It is therefore necessary to find a way to discover the fault earlier in the process. The cause of defects is very often “phase separation” (inhomogeneity in powder distribution), which can also be influenced by the holding pressure. This paper evaluates the powder distribution with a new method based on density measurement. Measurements were made using various holding pressure values.

The use of photogrammetry in improving quality of workpieces after an injection molding process

Polimery ◽  
2018 ◽  
Vol 63 (02) ◽  
pp. 134-144 ◽  
Author(s):  
Michal Wieczorowski ◽  
Bartosz Gapinski ◽  
Miroslaw Grzelka ◽  
Marek Szostak ◽  
Maciej Szymanski
Keyword(s):  
Injection Molding ◽  
Injection Molding Process ◽  
Molding Process

Function Analysis of Injection Molding

2011 ◽  
Vol 189-193 ◽  
pp. 2699-2703
Author(s):  
Ji Quan Li ◽  
Yan Hu ◽  
Ying Kong ◽  
Shao Fei Jiang ◽  
Chuan Chen
Keyword(s):  
Injection Molding ◽  
Detailed Analysis ◽  
Function Analysis ◽  
Injection Molding Process ◽  
Molding Process ◽  
Quality Function ◽  
Analysis And Evaluation ◽  
Definition Of

The function of injection molding process is described in the quality, function and costs of injection products from the definition of function. Detailed analysis and evaluation are taken to investigate these three aspects, and the aspect of injection products quality is principally discussed. The analysis and evaluation of injection molding process function will be kept as the judgment of quality of the process.

Influence of Technological Parameters on Material Flow

2015 ◽  
Vol 1120-1121 ◽  
pp. 1194-1197 ◽  
Author(s):  
Michal Stanek ◽  
David Manas ◽  
Miroslav Manas ◽  
Vojtech Senkerik ◽  
Adam Skrobak ◽  
...  
Keyword(s):  
Injection Molding ◽  
Injection Pressure ◽  
Polymer Processing ◽  
Injection Rate ◽  
Cavity Surface ◽  
Injection Molding Process ◽  
Technological Parameters ◽  
Molding Process ◽  
Processing Technologies

Injection molding is one of the most extended polymer processing technologies. It enables the manufacture of final products, which do not require any further operations. The tools used for their production – the injection molds – are very complicated assemblies that are made using several technologies and materials. Delivery of polymer melts into the mold cavity is the most important stage of the injection molding process. The fluidity of polymers is affected by many parameters Inc. mold design. Evaluation of set of data obtained by experiments in which the testing conditions were widely changed shows that the quality of cavity surface and technological parameters (injection rate, injection pressure and gate size) has substantial influence on the length of flow.

scholarly journals ANALYSIS ON VOLUMETRIC SHRINKAGE OF PLASTIC FOOD CONTAINER MADE FROM AN INJECTION MOLDING PROCESS

2020 ◽  
Vol 8 (2) ◽  
pp. 22-31
Author(s):  
Rosidah Jaafar ◽  
◽  
Hambali Arep ◽  
Effendi Mohamad ◽  
Jeefferie Abd Razak ◽  
...  
Keyword(s):  
Injection Molding ◽  
Process Parameters ◽  
Food Packaging ◽  
Plastic Injection Molding ◽  
Volumetric Shrinkage ◽  
Injection Molding Process ◽  
Molding Process ◽  
Melt Temperature ◽  
Plastic Injection

The plastic injection molding process is one of the widely used of the manufacturing process to manufacture the plastic product with high productivity. Moreover, the food packaging manufacturing industry undergoes the trials and errors to obtain the optimal setting of the process parameters in order to minimize the quality issues and these trials and errors are time consuming and costly. The aim of this study is to improve the quality of the butter tub by minimizing the volumetric shrinkage. This study is to deal with the application of Moldflow integrating with the statistical technique to minimize the volumetric shrinkage the butter tub which depends on the process parameters of the plastic injection molding. For this purpose, the rectangular shape of butter tub is designed by utilizing the SolidWorks. Molflow is used to simulate the plastic filling of the single cavity mold of butter tub based on the Taguchi’s �!" orthogonal array table. In addition, the analysis of variance (ANOVA) is applied to investigate significant impact of the process parameters on the quality of the butter tub. Minitab is used to optimize the response of the volumetric shrinkage by selecting the most appropriate process parameters that maximizing the desirability value. Furthermore, the butter tub has a uniform thickness which was 1.2 mm and its factor of safety was 3.383 and the volumetric shrinkage response have optimized by 0.956 %. The melt temperature and mold temperature are found to be the most significant process parameters for the plastic injection molding process of butter tub and the volumetric shrinkage value obtained from the simulation is verified by the calculated volumetric shrinkage value.

scholarly journals Self-Assembled Monolayers of Alkanethiols on Nickel Insert: Characterization of Friction and Analysis on Demolding Quality in Microinjection Molding

Micromachines ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 636
Author(s):  
Jiachen Chen ◽  
Jin Yang ◽  
Mingyong Zhou ◽  
Can Weng
Keyword(s):  
Injection Molding ◽  
Surface Effect ◽  
Mold Insert ◽  
Self Assembled Monolayers ◽  
Injection Molding Process ◽  
Molding Process ◽  
Adhesion Properties ◽  
Assembled Monolayers ◽  
Self Assembled

When the part geometry scaling down from macro to microscale level, the size-induced surface effect becomes significant in the injection molding process. The adhesion between polymer and nickel (Ni) mold insert during the process can lead to defects in necking, warping and deformation of microstructure. In this study, the self-assembled monolayers (SAMs) with low surface energy were deposited on the Ni surface to reduce the adhesion and further improve the demolding quality of the microstructure. Results show that the alkyl mercaptan SAMs with chemical bonds and close alignment can be successfully deposited on the surface of Ni by the solution deposition method. The contact angle, surface free energy, and friction coefficient before and after anti-adhesion treatment on the surface of mold insert were measured. In addition, the anti-adhesion properties of different alkyl mercaptan materials and the correspondingly replication quality of microstructure parts after injection molding were analyzed. It is found that the Ni mold insert treated by the perfluorodecanethiol has the best wear resistance and still shows good reproducibility at the 100th demolding cycle.

Optimization Design of Hot Runner Injection Molding for Thin Shell Parts Based on Moldflow

2014 ◽  
Vol 599-601 ◽  
pp. 564-567
Author(s):  
Xu Xia Zhu ◽  
Hai Xiao Zheng
Keyword(s):  
Injection Molding ◽  
Cycle Time ◽  
Thin Shell ◽  
Optimization Design ◽  
Design Parameters ◽  
Injection Molding Process ◽  
Injection Mold ◽  
Molding Process ◽  
Shell Part

In this paper, based on the characteristics of shell part, the application of hot runner system for the shell parts injection molding process was analyzed by Moldflow. According to this research, design parameters obtained were optimized. The result shows that hot runner system enables injection mold cooling faster , shortens the molding cycle time , and also improves the quality of the shell part.

A Numerical Analysis on the Behaviors of Polymer Film and Resin in an In-Mold Decoration Process

2013 ◽  
Author(s):  
Jonghyuk Yoon ◽  
Nahmkeon Hur ◽  
Ah-Hyun Bae ◽  
Taehee Lee
Keyword(s):  
Injection Molding ◽  
Polymer Film ◽  
Operating Conditions ◽  
Injection Molding Process ◽  
Molding Process ◽  
Initial Shape ◽  
Vacuum Suction ◽  
Polymer Resin ◽  
Film Forming

In various manufacturing industries, an in-mold decoration (IMD) process for plastic objects is widely utilized because a film forming and an injection molding process run simultaneously. In the present study, the deformation of polymer film and resin in the IMD process were numerically investigated to evaluate the quality of the plastic object formed by the IMD process, which consists of vacuum suction and injection molding. To obtain the initial shape of the polymer film during the injection molding process, the deformation of the polymer film in the vacuum suction process was pre-formed using the operating conditions needed to attach the film to a cavity. Since the properties and deformation of polymer film are greatly affected by the behavior of polymer resin being injected into a cavity, numerical simulations for the injection molding and film forming were performed with one-way coupling method. The results showed that the resin being injected could lead to the tearing of the polymer film in local regions near the corners. In order to verify the proposed numerical methodology, the numerical results of the deformation patters printed on the initial polymer film were compared with the experimental data.

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