Recent content by MTU_Husky

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    Melted cheese-like flow -- What is it called and its cause?

    I definitely misread the original post as I thought they were referring to injection molding plastic but after re-reading it they just stated this happens when melting the plastic. Do we know what method/process they are using to melt? It will not let me update my original post so I will...
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    Melted cheese-like flow -- What is it called and its cause?

    Hey PopaSmurf, A little more information is needed here such as the type of polymer you are using and is it glass filled, does it have lubricants or other additives? The term for that type of flow is "laminar flow" and all polymers flow this way. essentially you have long polymer chains...
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    Can I use symmetry in modal analysis in FEA

    In injection molding, we use a type of FEA software called MoldFlow that simulates plastic flowing in a mold. If the part is symmetrical, then we can use symmetry to save time. We also use symmetry with regards to the full shot vs. the number of cavities. So if I have four cavities on one...
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    Can I use thermal expansion to hold together materials?

    In the injection molding field, we used this concept (if I am understanding it correctly) to shut off between a mold face and a hot tip on a hot runner system. A hot runner system is essentially an area in the mold that is internally heated to keep the polymer flowing nicely. We actually design...
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    What are the latest advancements in automotive plastics technology?

    I am a Mechanical Engineer working in the automotive plastics industry. I found this site from a question that was linked on Bing.com. If anyone has any polymer related questions, I would be happy to assist! Thanks, Husky
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    Calculating Cavity Pressure in Injection Molding: Tips and Considerations

    Depends on if you are using an electric machine or a hydraulic machine and what stage you are in. If you are in the 1st stage then the cavity pressure should be zero as the polymer hasn't reached the end of the cavity yet. If you are in 2nd stage then I need to know if it is an electric machine...