Numerical Simulation of Mold Filling Processes with Polyurethane Foams

Geier, Stephanie; Winkler, Christian; Piesche, Manfred

doi:10.1002/ceat.200900202

Cited by 44 publications

(44 citation statements)

References 15 publications

(20 reference statements)

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“…The foaming kinetics of urethanization has been well studied by integrating chemical curing reaction with physical blowing process Haberstroh et al 2004;Seo et al 2005;Mao et al 2005;Geier et al 2009;Bikard et al 2005;Bikard et al 2007). The entire foaming process can be characterized by FOAMAT reactivity profiling (Patent No.…”

Section: Fig 1 High Performance Pir Panels For Cold Warehouse Use Mmentioning

confidence: 99%

Characterization of Insulation Performance, Poststability, and Foaming Process of Rigid Polyurethane Sandwich Panel for Cold Storage Warehouse

Sun

et al. 2017

J. Mater. Civ. Eng.

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Polyurethane (PU) is a commonly used insulation material for cold storage warehouses. The insulation performance of PU sandwich panels made from blended blowing agents were reassessed by k-factor measurements and insulation thickness calculation based on cold warehouse design standard, which has proved the significant impact of blowing agent difference on energy saving. The foam post-stability was also evaluated by mathematic profiling. The developed 3D paraboloid model based on gridding measurements has provided scientific method for panel shrinkage evaluation. Cell microstructure characterization and post-growth angle coefficients calculation were further performed for better understanding the shrinkage problem at microscopic level. The foaming process model of continuous panel production was developed based on FOAMAT characterization which has provided theoretical solution to panel processing.

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Section: Fig 1 High Performance Pir Panels For Cold Warehouse Use Mmentioning

confidence: 99%

Characterization of Insulation Performance, Poststability, and Foaming Process of Rigid Polyurethane Sandwich Panel for Cold Storage Warehouse

Sun

et al. 2017

J. Mater. Civ. Eng.

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“…Within these categories, it is to be distinguished whether the simulations are used to illustrate the manufacturing process of a product made of a compact or foamed PUR material. For example, [5][6][7][8][9][10][11] shows approaches for the numerical simulation of the RIM manufacturing process for polyurethane foams. In addition, some authors such as Riviere et al [12] take up special methods of plastics processing such as the rotational moulding process for reactive moulding resins.…”

Section: Introductionmentioning

confidence: 99%

Kinetic Prediction of Fast Curing Polyurethane Resins by Model-Free Isoconversional Methods

Stanko

Stommel

2018

Polymers

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Abstract:In this work, the characterisation of reaction kinetics of a methylene diphenyl diisocyanate (MDI)-based fast curing polyurethane resin (PUR) and the mathematical description of its curing process are presented. For the modelling of the reaction process isoconversional methods, which are also called model-free approaches, are used instead of model-based approaches. One of the main challenges is the characterisation of a reactive system with a short pot life, which already starts to crosslink below room temperature. The main focus is the evaluation of the applicability of isoconversional methods for predicting the reaction kinetics of fast curing polyurethane resins. In order to realise this, a repeatable methodology for the determination of time-and temperature-dependent reaction curves using differential scanning calorimetry (DSC) is defined. The cure models defined by this method serve as the basis for process simulations of PUR processing technologies such as resin transfer moulding (RTM) or reactive injection moulding (RIM) and reactive extrusion (REX). The characterisation of the reaction kinetics using DSC measurements is carried out under isothermal and non-isothermal conditions. Within this work isoconversional methods have been applied successfully to experimentally determined DSC data sets. It is shown that the reaction kinetics of fast curing polyurethane resins can be predicted using this methods. Furthermore, it is demonstrated that the time-dependent change of conversion of the considered polyurethane under isothermal curing conditions can also be predicted using isoconversional methods based on non-isothermal DSC measurements. This results in a significant reduction in the experimental effort required to characterise and model the curing process of polyurethanes.

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“…Describing polyurethane (PU) foams as a pseudohomogeneous fluid with continuously changing material properties is a common approach when modelling the mould filling processes [1][2][3][4].…”

Section: Simulation Of Mould Filling With Polyurethane Foamsmentioning

confidence: 99%

“…Thus, the numerical simulation of the foaming process is important for the overall design process to define suitable injection points and air vents to avoid these defects. Different authors [1][2][3][4][5] addressed these issues.…”

Section: Introductionmentioning

confidence: 99%

Prediction of acoustic foam properties by numerical simulation of polyurethane foaming process

Abdessalam

Abbès

et al. 2016

MATEC Web Conf.

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Abstract. This work aims to model and to simulate the polyurethane foaming process. Models taking into account the two main chemical reactions of the formation of polyurethane, the exothermic effect of these reactions as well as the thermo-rheo-kinetic coupling characterizing this process are proposed and implemented in the software NOGRIDpoints based on a meshless method (Finite Pointset Method). A prediction of some acoustic foam characteristics is also proposed based on the results of the numerical simulation of the foaming process and semi-phenomenological models.

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Numerical Simulation of Mold Filling Processes with Polyurethane Foams

Cited by 44 publications

References 15 publications

Characterization of Insulation Performance, Poststability, and Foaming Process of Rigid Polyurethane Sandwich Panel for Cold Storage Warehouse

Characterization of Insulation Performance, Poststability, and Foaming Process of Rigid Polyurethane Sandwich Panel for Cold Storage Warehouse

Kinetic Prediction of Fast Curing Polyurethane Resins by Model-Free Isoconversional Methods

Prediction of acoustic foam properties by numerical simulation of polyurethane foaming process

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