Investigation of Flow and Sink Initiation Process in Mold Shapes in Injection Molding
Author(s) -
Tetsushi Kaburagi,
Masashi KUROSE,
Takahiro Ogawa,
Hiroki Kuroiwa,
Tomoyuki Iwasawa
Publication year - 2015
Publication title -
international journal of automation technology
Language(s) - English
Resource type - Journals
eISSN - 1883-8022
pISSN - 1881-7629
DOI - 10.20965/ijat.2015.p0010
Subject(s) - mold , sink (geography) , shrinkage , materials science , molding (decorative) , composite material , transfer molding , heat sink , volumetric flow rate , mechanical engineering , mechanics , engineering , physics , cartography , geography
Injection molding has faults, or sinks, caused by the shrinkage ofmaterials. Sinks should be inhibited since they greatly affect the dimensions of moldings. In this study, a mold that allows visual observation is employed, and the sink initiation process is analyzed and predicted based on the results of that analysis. This mold has two sections, one flat and one curved. The difference between the deformations in the flat and curved sections is investigated. Methods of inhibiting sinks are considered from the results of the analysis and injection molding experiments. Packing pressure is found to have a great effect on sinks.
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