Plastics

             In this laboratory there will be a few things tested, and experimentally concluded. There will be a determination of the process window for a specific material/mold/machine combination from data collected from flow simulation software. The material that was used was a Bayer USA ABS. Also, to determine the process window using, "mold-area" and "in-mold rheology" diagrams.
             In test one, the part that was tested using the flow simulation software was drawn in solidworks, and there was a brief overview of moldflow. Test two involved the solidworks part being imported into mold flow and 25 analyses run.
             The Molding Area Diagram showed that the machine being used would be able to mold all of the parts, achieving the proper temperatures and pressures. Inside the mold area diagram is the optimum processing conditions. All of the points on the graph were feasible on the machine that was being used. The second diagram was the –in-mold Rheology diagram which allows one to gauge where the viscosity was the most stable. With this graph, one is able to determine the optimum operating temperature, injection velocity, and melt viscosity.
             This experiment involved the use of both solidworks and moldflow. Solidworks was used to make the part that was going to be tested. Using line drawings solidworks was able to render a 3-D part. Figure one has a dimensioned drawing of the part including the runner and sprue.
             Figure One: Dimensioned Part for moldflow.
             Moldflow version 4.0 was used to run melt flow tests, on the filling portion of the injection process. There were two parameters adjusted, the melt temperature and the injection velocity. At each of the temperatures 200, 210, 220, 230, and 240°C five different injection velocities were tested ranging from 1.27 to 6.35 cm/s. At each of the twenty-five tests several parameters were measured including: crossover pressure, location and value of m
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Plastics. (1969, December 31). In MegaEssays.com. Retrieved 05:50, March 28, 2024, from https://www.megaessays.com/viewpaper/18975.html