Simulation & Development

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Mit modernen Technologien zu fundierten Entscheidungen

Virtual Mold- and Process-Optimisation

Moderne Gummispritzgießprozesse stellen die Verarbeiter vor verschiedenste Herausforderungen. Die Bauteile werden zunehmend komplexer und zur gleichen Zeit wird eine effiziente und ressourcenschonende Produktion gefordert. Zudem müssen die Verarbeiter gegenüber der günstigen Produktion aus Übersee wettbewerbsfähig bleiben. Eine virtuelle Werkzeug- und Prozessoptimierung spart hier Zeit und Kosten in der Entwicklung und schafft damit Wettbewerbsvorteile. more...

December 5. 2017 - Article

Yaagoubi_

Simulation of Tearing Energy

Prediction of Energy Release Rate in Anti-Plane Shear State (Mode III) for unfilled Elastomers

The analytical energy release rate of a cracked body in anti-plane shear state is determined by means of using the solution of the boundary value problem. The analytical calculations in the non-linear fracture mechanics are based on non-linear hyperelastic material behaviour. The Ogden model is considered for the numerical calculation of the J-integral and the […] more...

December 1. 2017 - Research news

Riyajan_Unbenannt

Smart Hydrogel

Physical Properties of smart maleated Poly(vinyl alcohol) –g-Poly (N-isopropylacrylamide) and natural Rubber Latex

The objective of this work was to analyze the physical properties of smart polymer from a maleated poly (vinyl alcohol) (PVAM) graft copolymer with poly-N-isopropylacrylamide (PNIPAM) (PVAM-g-PNIPAM) and natural rubber (NR) latex in green route. The mechanical properties of  the swollen hydrogel was enhanced by the addition the NR latex.  The PVAM-g-PNIPAM and PVAM-g-PNIPAM/NR hydrogel […] more...

April 25. 2017 - Research news

Mistler

Introduction of a general Procedure

Lifetime Prediction with nonlinear Damage Accumulation based on Material Stressing Part I: Introduction of a general Procedure

A lifetime prognosis model for elastomer components through nonlinear damage accumulation of material stressing is introduced. This approach does not only offer the calculation of part lifetime based on changing part or material specific characteristic values during their lifetime but also the resulting changing arrangement of inner stresses with the finite element method. Once the […] more...

April 10. 2017 - Research news

Westervoß_

Nonlinear elastic Effects of Rubber Polymers

Evaluation of nonlinear differential Models for the Simulation of Polymer Melts

An improved understanding of nonlinear elastic effects of rubber polymers involving very high relaxation times is of intensified interest, while the description and simulation of such flows is still a challenging problem. The present work “Evaluation of nonlinear differential models for the simulation of polymer melts” evaluates the capability of certain differential viscoelastic models in […] more...

March 8. 2017 - Research news

Leibnitz_Institut

Modelling with the strain Amplification appread to Mullins and Tobin

The Concept of hydrodynamic Amplification in filled Elastomers

Rubbers are generally filled with rigid particles to improve their mechanical properties, especially their stiffness. The increase in stiffness can be described by the so-called hydrodynamic amplification factors. For the non-linear regime of deformation the strain amplification approach according to Mullins and Tobin is often used. In this work the origin of the hydrodynamic amplification […] more...

February 8. 2017 - Research news

Analysis

Fully automated Rubber Rheometers

Alpha Technologies will be showcasing Premier TM its latest rubber rheometer product line-up to ensure reliable rubber testing. The range includes, Premier TM HC, a fully automated high capacity module, Premier TM MDR, specifically designed for the tire industry and Premier TM MV, a variable speed Mooney with rotor presence detection, a multi-zone stress relaxation data analysis and 45% reduction in die cooling time. more...

February 8. 2017 - Product Review

Bild: fotolia.com/vege

Tire Technology Expo 2017

Rubber and Tire Experts in Hanover

Now in its seventeenth year, Tire Technology Expo is one of the world‘s most important tire manufacturing technology exhibition and conference. It offers the visitor the world‘s premier technology showcase, with exhibits of equipment and materials covering the complete spectrum of the tire manufacturing process. More than 260 exhibitors will be present. more...

February 7. 2017 - Article

Next Generation Colour Inspection System for Extruder Lines. Source: Micro Epsilon

Inspection

Inspect the Color Code Accurancy

Micro-Epsilon will be exhibiting its latest tire color inspection unit, designed to provide fully equipped color coding, color code inspection and width inspection of extruded tread. more...

January 31. 2017 - Product Review

Bildquelle: Sigma Engineering

2-Komponenten-Werkzeugtechnik für Silikonspritzguss

LSR Processes Set-up Virtually Testing new concepts

During the processing of liquid silicone rubber (LSR) Sigmasoft Virtual Molding is a vital tool. Because of their particular rheology and cross linking kinetics, LSRs only allow for a narrow processing window and thus present some challenges to the processor. These circumstances have however motivated a number of innovations, to fully exploit the potential of […] more...

December 8. 2016 - Article

3D Druck mit Silicon, Prototyp, ACEO®, 3D printing with silicone. Bild: alle Wacker

3D Printer for Silicones

3D Printer for Silicones

Der Münchner Chemiekonzern Wacker präsentiert auf der K 2016 einen industriellen 3D-Drucker für Silikone. Das Gerät wird während der Messe in Betrieb sein und Teile aus Silikon drucken. Der Drucker zur additiven Fertigung von Bauteilen aus Silikon arbeitet nach dem Dropon-Demand-Verfahren. Vor allem für Entwickler aus der Automobil-, Luft- und Raumfahrtindustrie wird die Technik interessant sein. more...

October 19. 2016 - Article

seiichi-kawahara_

NMR Spectroscopy of Latex

Mechanism of heterogeneous Hydrogenation of natural Rubber in Latex

Heterogeneous hydrogenation of natural rubber (NR) present in disper-soids in latex is studied by latex-state 13C-NMR spectroscopy in order to elucidate its mechanism. The hydrogenation is carried out with palladium catalyst under hydrogen gas atmosphere at 297 to 353 K for various reaction times. The conversion of hydrogenation is found to be dependent upon reaction […] more...

October 12. 2016 - Research news

ikv_philipp-bruns

Influencing the anisotropic material behavour of TPV

Characterization of anisotropic material behavior of injection moulded TPV-products

Thermoplastic vulcanizates show a strong anisotropy in their material properties after injection moulding. For example, mechanical properties like stiffness or strength can differ longitudinally or transversely to the flow direction by a factor of two. In a research project important factors (process, material, geometry) influencing the anisotropic material behaviour of TPV were identified. With the […] more...

October 7. 2016 - Research news

Die Rechner-Box leistet  eine hohe Datensicherheit durch den verschlüsselten VPN-Tunnel. Bild: Desma

Digitale Serviceleistungen für Gummi-Spritzgieß-Anlagen

Digital services for rubber injection moulding systems

Often, the efficiency of a machine by itself is not the decisive factor in an overall system effectiveness analysis. more...

September 12. 2016 - Article

Thomas Kroth_Fraunhofer

Simulation of damage mechamism

A concept for temperaturedependent fatigue prediction of elastomer components

Within the BMWi funded project „Elasto-Opt“ an exemplary elastomer-mixture based on a natural rubber (NR) was investigated. The goal of the project was to determine the influence of the temperature on the material’s behavior and lifetime. Based on a manifold of experimental investigations, a concept for the prediction of the temperature-dependent lifetime was worked out. […] more...

September 9. 2016 - Research news

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