AUTOMOTIVE | UNDER THE HOOD
Left: Demonstrator part moulded with Technyl RED for pulsated air pressure tests at Domo’s Application Performance Testing centres. Right: Injection filling simulation performed on electric parts
flexural strength – under wet conditions compared with PA66 and PA6 and also incumbent Noryl GTX grades. Domo offers MMI advanced predictive simula- tion services for PA66 parts (in this instance, MMI stands for Multi-scale modelling, Mechanical calculation, and Injection moulding simulation). The company has now introduced a simulation tool devised to help OEMs and parts suppliers develop stronger, lighter, more cost-effective PA6 parts. For fibre-reinforced materials, advanced mechanical simulations factor in the orientation of glass fibres induced by the injection process. Digimat software is used to achieve this integrative simulation technology. Domo’s team has devel- oped expertise in integrative simulation for the Technyl A range of PA66-GF materials, enabling more accurate simulation results. Now, thanks to a concerted R&D effort on PA6-GF materials, its material cards are now available for the Technyl C range based on PA6. The new MMI material cards are available for a
wide array of glass fibre concentrations and temperatures, as well as for elastic and elastoplastic models with failure indicators. These comply with the state-of-the-art tools available in Digimat and lead to the same accurate results as those obtained for PA66 compounds. The new material cards are a step towards bringing the PA6 database to the same performance level as PA66. The company plans to add crash-dedicated and thermal models to the database in the future. “Thanks to MMI predictive simulation, we are able to achieve Technyl parts that are lighter, safer and cheaper,” says Gilles Robert,Material Expert at Domo. “Our customers benefit from shorter development times, with better control over internal costs. Expanding Domo’s material database for simulation enables more customers and more applications to take full advantage of the cutting-
54 INJECTION WORLD | May 2022
edge accuracy of PA66 and now PA6 simulations.” “At Domo, our unique value proposition is our holistic scientific approach,” says Emilien Mattacola, Global Key Account Manager Automotive Market. “Material models are the end of a chain where each link has been optimised to achieve maximum accuracy. Tests are optimised to maximise precision, with material modelling relying on specifically designed proce- dures and meta modelling technology. Domo tests and methods differ from the standard ones to build material models, achieving a higher level of accuracy compared to competition.” “We are forerunners in this approach to provide highly qualitative data, in both injection and mechanical simulation with MMI,” says Robert. “We are definitely service innovators on PA66, and PA6 will benefit from all the work that has led up to this. Integrative simulation is an important market trend, to achieve lower validation costs for parts and ensure better control of parts development timing.” Tisan Engineering Plastics offers custom-engi-
neered compounds for under-the-hood applica- tions designed to withstand the rigors of the harsh operational environment. The company produces PA compounds under the Tislamid brand name. The custom formulations of PA compounds are designed by selecting material according to the relation between application, cost and perfor- mance. For example, Tislamid B 30 D03 K02 K06 R02 is a PA 66 compound with 30% glass fibre reinforcement, and is hydrolysis and heat stabi- lised. The grade “offers outstanding stability at high service temperature and is designed for high-tech engine compartment applications such as air intake manifolds”, says Tisan. The cooling system is the principal applications
area for hydrolysis stabilised Tislamid PA 66 grades. For example, Tislamid 50 D03 K06 R01 is a 50% glass fibre reinforced and hydrolysis stabilised PA 66, which resists aging in the presence of water glycol coolants. It is used especially in cooling systems. “This compound produces a better surface appearance than any other polyamide currently used for this type of application,” says Tisan. The company has also developed PPS and PPA based compounds under the respective brand names Hyperpol SP and Hyperpol AP. The main feature of Hyperpol SP compounds are their higher heat resistance which makes them a suitable material choice for demanding under-the-hood applications. The Hyperpol PPA grades deliver exceptional structural integrity and impact resist- ance at high temperatures, according to Tisan. In addition, the company also offers blended solu-
www.injectionworld.com
IMAGE: DOMO
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