Finite Element in Designing of the Gate Location, Shape and Moulding Injection Path

Abstract:

800x600 Like all industrial processes, injection molding can produce flawed parts. In the field of injection molding, troubleshooting is often performed by examining defective parts for specific defects and addressing these defects with the design of the mold or the characteristics of the process itself. Trials are often performed before full production runs in an effort to predict defects and determine the appropriate specifications to use in the injection process [1]. Gate solidification time is important, as it determines cycle time and the quality and consistency of the product, which itself is an important issue in the economics of the production process. Holding pressure is increased until the parts are free of sinks and part weight has been achieved. [2] The number of triangle in the mesh has an impact on calculation times. Each triangle has three nodes and the calculations done by the SolidWorks Plastics solvers are performed at each of those nodes. So, a higher number of elements mean a higher number of nodes and as the number of nodes increases, compute time increases. That said, element counts up to 100,000 should solve in a reasonable time, while element counts over 100,000 may take longer to solve. Gates vary in size and shape depending upon the type of plastic being molded and the size of the part. Small gates have a better appearance but take longer time to mold or may need to have higher pressure to fill correctly. Large parts will require larger gates to provide a bigger flow of resin to shorten the mold time. In this paper we will study the influence of the gate shape and location over the specimen. We will study in particular the fiber orientation for a material reinforced with fiberglass.

• Periodical: Advanced Materials Research (Volume 1036)
• Pages: 417-421
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1036.417
• Online since: October 2014
• Authors: Ciprian Dumitru Ciofu*, Dumitru Nedelcu
• Keywords: Flow Simulation, Gate Location, Injection Molding, Plastic

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