Determination of the optimal process parameters in metal injection molding from experiments and numerical modeling

Quality characteristic improvement of an injection moulding product made from blends plastic by optimizing the injection moulding parameters using Taguchi method

“…need to be optimized in order to produce finished plastic parts with good quality. A range of studies have been carried out to improve or to optimise the quality characteristic as to produce commercial plastic product on injection moulding machine [7][8][9][10]. However, most of the researchers do not consider the interaction of the parameters.…”

A numerical study of solidification in powder injection molding process

“…Till date few research works have been reported [4][5][6][7][8][9][10][11][12][13][14] to numerically analyze the injection stage of PIM and there is hardly any commercial package available to describe this injection stage in PIM. The literature review shows that researchers have addressed mainly the flow pattern during the mold filling process of the injection stage.…”

“…To simulate the mold filling process majority of the researchers [4][5][6][7][8][9][10] have considered feedstock melt as a homogeneous single fluid with properties of the mixture and single set of conservation equation is solved to simulate the mold filling. On the other hand, in a relatively new approach, multiphase flow concepts have been applied by some of the researchers [11][12][13][14] to take care of the heterogeneous behavior of the feedstock. In this approach, it is considered that the feedstock melt is composed of two separate fluids: powder and binder, where powder is considered as one fluid with its own properties and binder is another fluid with its own properties.…”

“…Two separate sets of conservation equations are solved simultaneously and an interaction term is introduced for momentum transfer between the phases. Also it may be noted that researchers [12][13][14] who have employed the multiphase approach, did not carry out non-isothermal simulation, which resembles the actual filling process. They also did not take into account the nonNewtonian rheological behaviour of the phases and used constant value for the phase interaction coefficient which really depends on the viscosity of the primary phase and the volume fraction of the secondary phase.…”

The bi-phasic numerical simulation of metal co-injection molding

“…Similar to MIM process, powder segregation in each injected feedstock should be taken into account in MCM. Based on the previous works on bi-phase explicit algorithms [3,4,5], a new bi-phasic model for MCM is discussed and the relevant algorithm is developed. Generally the two types of feedstocks present different properties, such as viscous behavior, density and powder/binder volume fraction.…”