Effect of Variation of Injection Molding Parameters on Static, Dynamic and Thermo-Mechanical Material Properties of Filled Polymer Materials

2021 ◽  
Vol 1020 ◽  
pp. 181-186
Author(s):  
Vaclav Contos
Keyword(s):  
Mechanical Properties ◽  
Structural Analysis ◽  
Injection Molding ◽  
Material Properties ◽  
Glass Fibers ◽  
Discrete Element ◽  
Polymer Materials ◽  
Filled Polymer ◽  
Polymer Glass ◽  
Injection Molding Simulation

A material (polymer + glass fibers) is characterized by its inhomogeneity and anisotropy. This material is subjected an injection molding simulation at first (generally unnewton type of fluid). Then the material is cooled and common structural analysis (static, dynamic and thermal) is performed. The cooled material has dissimilar mechanical properties for each of discrete element. Thus the mechanical properties (after simulation of load) will completely have different values when influence of injection molding is included.

Effect of Variation of Injection Moulding Parameters on Static and Dynamic Material Characteristics of Filled Polymer Materials

2018 ◽  
Vol 1147 ◽  
pp. 42-47
Author(s):  
Vaclav Contos
Keyword(s):  
Mechanical Properties ◽  
Structural Analysis ◽  
Injection Moulding ◽  
Mechanical Characteristics ◽  
Discrete Element ◽  
Polymer Materials ◽  
Filled Polymer ◽  
Material Characteristics ◽  
The Continuum

A Continuum (filled polymer) is inhomogeneous and anisotropic. The Continuum is used in an injection moulding simulation at first (generally unnewton type of fluid). Then the continuum is solid (after cooling) and it is possible to carry out ordinary structural analysis with it both static and dynamic. The solid continuum has different mechanical properties for each of discrete element. The consequent values of mechanical characteristics (after simulation of load) will generally have different values when influence of injection moulding is taken into account for analyses.

The Effect of Heat Treatment on Mechanical Properties of Car Interior Fabric Used for Injection Molding

2012 ◽  
Vol 532-533 ◽  
pp. 234-237
Author(s):  
Wei Lai Chen ◽  
Ding Hong Yi ◽  
Jian Fu Zhang
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
High Temperature ◽  
Injection Molding ◽  
High Temperatures ◽  
Material Properties ◽  
Injection Molding Process ◽  
Molding Process ◽  
Composite Fabrics

The purpose of this paper is to study the effect of high temperature in injection molding process on mechanical properties of the warp-knitted and nonwoven composite fabrics (WNC)used in car interior. Tensile, tearing and peeling properties of WNC fabrics were tested after heat treatment under120, 140,160,180°C respectively. It was found that, after 140°C heat treatment, the breaking and tearing value of these WNC fabrics are lower than others. The results of this study show that this phenomenon is due to the material properties of fabrics. These high temperatures have no much effect on peeling properties of these WNC fabrics. It is concluded that in order to preserve the mechanical properties of these WNC fabrics, the temperature near 140°C should be avoided possibly during injection molding process.

Comparison of recent fiber orientation models in injection molding simulation of fiber-reinforced composites

2018 ◽  
Vol 33 (1) ◽  
pp. 35-52 ◽  
Author(s):  
Huan-Chang Tseng ◽  
Rong-Yeu Chang ◽  
Chia-Hsiang Hsu
Keyword(s):  
Structural Analysis ◽  
Injection Molding ◽  
Fiber Orientation ◽  
Rotational Diffusion ◽  
Deep Understanding ◽  
Fiber Suspension ◽  
Model Parameters ◽  
Fiber Reinforced ◽  
Fiber Orientation Distribution ◽  
Injection Molding Simulation

In the structural analysis of automotive products made of lightweight fiber-reinforced thermoplastics (FRT), the primary mechanical requirement is their relation to the orientation states of fibers. The famous Folgar–Tucker equation of fiber orientation has hitherto been used to predict the skin–shell–core structure of fiber orientation patterns for injection-molded fiber composites. However, this model results in inaccurate predictions regarding the thinner core width. To enhance the reliability of fiber orientation predictions, Tucker and coworkers rigorously derived the reduced strain closure and anisotropic rotary diffusion (ARD) models in relation to the theoretical rheology of fiber suspension. More recently, the improved ARD and retarding principal rate model and the Moldflow rotational diffusion model were developed and made available in the industry dealing with the state-of-the-art software of injection molding simulation. A deep understanding of these fiber models is important for achieving successful FRT structural analysis. In this work, we therefore investigate the accuracy of these fiber orientation models, as well as the changes in fiber orientation distribution related to model parameters and model objectivity.

Influence of Irradiation Doses on Mechanical Properties of Glass Fiber Filled PBT

2015 ◽  
Vol 752-753 ◽  
pp. 130-135
Author(s):  
Petr Kratky ◽  
David Manas ◽  
Miroslav Manas ◽  
Michal Stanek ◽  
Martin Ovsik ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Surface Layer ◽  
Polymer Material ◽  
Applied Load ◽  
Glass Fibers ◽  
Polymer Materials ◽  
Cross Linking ◽  
Depth Sensing ◽  
Hard Surface ◽  
End Use

The submitted paper compares mechanical properties of the hard surface layer of modified PBT filled by 35% of glass fibers. Hard surface layer was made by radiation cross-linking technology which allows polymer materials modification followed by the change of their end-use properties. The surface layer of polymer material is modified by β – radiation. When the polymer material is exposed to the β – radiation, it is possible to observe changes of the surface layer at applied load. The mechanical properties were measured by nanohardness test with using the DSI method (Depth Sensing Indentation).

scholarly journals Relation between the degree of agglomeration of the filler and the mechanical properties of particle-filled polymer materials.

1989 ◽  
Vol 46 (7) ◽  
pp. 397-403 ◽  
Author(s):  
Yurii M. TOVMASYAN ◽  
Vasilii A. TOPOLKARAEV ◽  
Aleksandr A. BERLIN
Keyword(s):  
Mechanical Properties ◽  
Polymer Materials ◽  
Filled Polymer

Mechanical Properties of Irradiated Polyamide under Thermal Stress

2016 ◽  
Vol 368 ◽  
pp. 178-181 ◽  
Author(s):  
Martin Bednarik ◽  
David Manas ◽  
Miroslav Maňas ◽  
Ales Mizera ◽  
Vojtech Šenkeřík
Keyword(s):  
Mechanical Properties ◽  
Raw Materials ◽  
Glass Fibers ◽  
Chemical Properties ◽  
Polymeric Materials ◽  
Polymer Materials ◽  
Beam Radiation ◽  
Manufactured Products ◽  
Radiation Crosslinking ◽  
Positive Effect

It was found in this study, that radiation crosslinking has a positive effect on the mechanical properties of selected type polyamide. In recent years, there have been increasing requirements for quality and cost effectiveness of manufactured products in all areas of industrial production. These requirements are best met with the polymeric materials, which have many advantages in comparison to traditional materials. The main advantages of polymer materials are especially in their ease of processability, availability, and price of the raw materials. Radiation crosslinking is one of the ways to give the conventional plastics mechanical, thermal, and chemical properties of expensive and highly resistant construction polymers. The main purpose of this paper has been to determine the effect of radiation crosslinking on the tensile strength and elongation of PA 66 (filled with 30 % glass fibers). These properties were examined in dependence on the dosage of the ionizing electron beam radiation (non-irradiated samples and those irradiated by dosage 66 and 132 kGy were compared) and on the test temperature (23, 50, 80, and 110 oC). Radiation cross-linking of PA 66 results in increased mechanical strength, and decreased of elongation. As an addition, the increased surface microhardness of polyamide was found.

Influence of the Processing Conditions on the Mechanical Properties of PA 6 - Halloysite Nanotubes Nanocomposites for Injection Moulding

2012 ◽  
Vol 445 ◽  
pp. 313-318
Author(s):  
Angel Fernandez ◽  
Manuel Muniesa ◽  
Carlos Javierre ◽  
Victor Camanes
Keyword(s):  
Mechanical Properties ◽  
Injection Molding ◽  
Extrusion Process ◽  
Halloysite Nanotubes ◽  
Raw Material ◽  
Full Characterization ◽  
Injection Molding Simulation ◽  
Improved Performance

Nowadays polymer based nanocomposites are very interesting to manufacture products of less weight and higher mechanical properties and specific performance depending on the morphology of nanoscaled reinforcement. Most of these potential improvements are focused to the challenges newer products require like HEV (hybrid or electrical vehicles) for example. The development of these new products requires the full characterization of the rheological and mechanical behavior of the materials and the correct preparation of the raw material for further processing. As an example two nanocomposite blends were prepared letting down a masterbach of PA6+30% HNT (Halloysite nanotubes) to 3% and 6% of HNT content in a PA6 matrix of (BADADUR). The letting down process was developed in an extrusion-compounding machine (COPERION ZSK 26) and the rheological behavior was determined in a capillar rheometer obtaining the viscosity curves of the material needed for injection molding simulation. The products obtained were used for injection molding of test specimens in an electrical injection machine (JSW EL II 85). In addition, the letting down process was done directly in the injection machine in order to establish the relevance of the previous extrusion process. The probes obtained were analyzed by DSC and FTIR to determine the functional groups of the resultant product and SEM and TEM to determine the quality of the dispersion of the nanotubes. The probes were finally tested to determine its stiffness and tensile properties. The results showed the feasibility to develop parts made of nanocomposite with improved performance with scaled industry equipment with natural reinforcements..

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