Three-Dimensional Simulation And Design Sensitivity Analysis Of The Injection Molding Process

2004 ◽  
Author(s):  
Florin Ilinca
Keyword(s):  
Sensitivity Analysis ◽  
Injection Molding ◽  
Three Dimensional ◽  
Design Sensitivity ◽  
Design Sensitivity Analysis ◽  
Injection Molding Process ◽  
Molding Process ◽  
Dimensional Simulation

Design Sensitivity Analysis Applied to Injection Molding Process: Injection Pressure and Multi-Gate Location Optimization

2000 ◽  
Author(s):  
Kalonji K. Kabanemi ◽  
Jean-François Hétu ◽  
Abdessalem Derdouri
Keyword(s):  
Sensitivity Analysis ◽  
Injection Molding ◽  
Injection Pressure ◽  
Pressure Profile ◽  
Design Sensitivity ◽  
Design Sensitivity Analysis ◽  
Injection Molding Process ◽  
Molding Process ◽  
Filling Fraction ◽  
Design Variables

Abstract In this work, we develop a numerical simulation method to optimize the injection molding process using the design sensitivity analysis (DSA). The optimization concerns the filling stage and focuses on the number and location of gates in a mold cavity as well as the injection pressure, considered as one of the key processing parameters, in order to minimize the fill time. Since the problem to be solved involves transient flow with free surfaces, the direct differentiation method is used to evaluate the sensitivities of the Hele-Shaw, filling fraction and the energy equations with respect to the design variables used in the analysis. The mesh domain parameterization is coped with using B-spline functions. Sensitivity equations are solved by means of finite element method. The proposed numerical approach is combined with the sequential linear and quadratic programming method of the DOT optimization tools to find the new design variables at each iteration. Starting with any initial gate locations and injection pressure profile, the method enables us to find the optimal gate locations together with the optimal injection pressure profile. Finally, numerical results involving complex mold geometries are presented and discussed to assess the validity and robustness of the proposed method.

Parallel three-dimensional simulation of the injection molding process

2009 ◽  
Vol 59 (7) ◽  
pp. 801-815 ◽  
Author(s):  
B. J. Araújo ◽  
J. C. F. Teixeira ◽  
A. M. Cunha ◽  
C. P. T. Groth
Keyword(s):  
Injection Molding ◽  
Three Dimensional ◽  
Injection Molding Process ◽  
Molding Process ◽  
Dimensional Simulation

Polypropylene Based Piezo Ceramic Compounds for Micro Injection Molded Sensors

2017 ◽  
Vol 742 ◽  
pp. 807-814 ◽  
Author(s):  
Christoph Doerffel ◽  
Ricardo Decker ◽  
Michael Heinrich ◽  
Jürgen Tröltzsch ◽  
Mirko Spieler ◽  
...  
Keyword(s):  
Injection Molding ◽  
Ceramic Powder ◽  
Three Dimensional ◽  
Conductive Filler ◽  
High Sensitivity ◽  
Injection Molding Process ◽  
Molding Process ◽  
Ceramic Particles ◽  
Wide Range ◽  
Ceramic Compounds

Polymer matrix compounds based on piezo ceramic and electrically conducting particles within a thermoplastic matrix show distinctive piezoelectric and dielectric effects which can used for sensor applications. The electrical and mechanical properties can be adjusted in a wide range by varying the ratio of active filling particles and the matrix materials. The sensor effect of the compound is generated by the ceramic particles. A large ratio of piezo ceramic powder facilitates a high sensitivity. The electrical permittivity of the otherwise insulating matrix polymer can be adjusted by the amount of conductive filler. An aligned permittivity leads to a stronger electrical field in the ceramic particles. In contrast, too many conductive particles create a conductive network in the compound which short-circuits the sensors. The piezo ceramic compounds can be processed via micro injection molding for application as ceramic sensors. This offers a wide range of new sensor design variants, notably three-dimensional and highly complex geometries. However, there are two main demands for a highly sensitive sensor, which are conflicting. On the one hand the filler content of piezo ceramic particles in combination with electrical conductive carbon nanotubes must be very high, on the other hand the wall thickness should be as thin as possible. For filling cavities with a high aspect-ratio in an injection molding process, low viscosity polymer melts are necessary. These process characteristics conflict with the increasing viscosity by filling the melt with the particles. The sensor measuring area has to be designed as thin walled as possible. In order to overcome this obstacle a dynamically tempered mold design is applied to avoid solidification of the melt, before the mold is completely filled. The mold can be tempered by Peltier elements. The fully electric tempering is cleaner, more precise and more reliable than conventional water or oil tempering.

scholarly journals LCI Databases Sensitivity Analysis of the Environmental Impact of the Injection Molding Process

2015 ◽  
Vol 7 (4) ◽  
pp. 3792-3800 ◽  
Author(s):  
Ana Elduque ◽  
Carlos Javierre ◽  
Daniel Elduque ◽  
Ángel Fernández
Keyword(s):  
Sensitivity Analysis ◽  
Environmental Impact ◽  
Injection Molding ◽  
Injection Molding Process ◽  
Molding Process
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