On-Line Viscosity Measurement and Monitoring Applied to Injection Molding Process
| Autor: | Chih-Chan LIN, 林志展 |
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| Rok vydání: | 2013 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 101 Plastic Injection Molding realizes the important methods of an industrial product’s mass output of assembly parts. At present, defining calibration of injection molding parameters depend on operators going through several trial and errors or basing on self experience, thus it unable to quickly obtain ideal molding condition and product quality. Although CAE Analysis can estimate the possible occurrences of molding problems and to treat them ahead of time during pre-mold setup, but under known practices, there are some differences between Mold Flow Analysis and the actual parameters, an analysis value cannot be directly set in the actual molding parameters, in order to reduce man-hour or increase production efficiency. The goal of this thesis paper is to establish actual set values as theory based intelligent module, allowing users to simply input of information, as well as getting actual molding parameters. This research uses long-flat-plane-shape model (Strip model) and carries CAE Mold Flow Analysis. On the actual molding experiment, the established model uses four kinds of thickness (t) to match different flow length ratio (L/t), with cavity pressure sensor installation (near gate area), and cavity temperature sensor installation (far from gate area), thus, to measure pressure loss at filling stage and fill time difference, to acquire shear stress and changes on shear rate, to enter formula and gain knowledge of viscosity value, to compare and verify actual measured values and analysis values, and to apply discussions between analysis values difference. Experimental and simulation material uses ABS (PA-756), mold temperature is set at 50°C, melt plastic temperatures are 220°C, 240°C, 260°C, respectively. Due to analysis and test of short shot processes in relation to filling comparisons, in order to get hold of a realistic filling time, it is proven on different machines, establishing of intelligent module within so to provide actual production usage on the floor. This research passes actual validated results, after establishing a standard mode, every established filling module uses of intelligent controllers, followed by switchover to holding pressure module, then cooling module may also comply accordingly. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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