Finite element modelling of the coupled pressure volume phenomena during inflation

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ConferencePolymer Processing Society (PPS) Regional Meeting 2005, August 14-17, 2005, Quebec City, Quebec, Canada
Pages# of pages: 2
AbstractIn industrial blow molding machines, the inflation pressure is only controlled in the upstream blowing device and not inside the cavity. However, observations show that the inside measured pressure is considerably lower than the nominal one captured in the upstream air feeding system. Several recent investigations show that if the volume of the enclosed gas changes significantly during the inflation stage, then the assumption that the internal pressure is know and constant can be incorrect. In this case, the internal pressure becomes a function of the unknown cavity volume. This paper presents a thermodynamical model used for predicting the pressure evolution in molded cavities during the inflation process. A brief recall of the FEM formulation and implementation is also presented. Experimental validation of the numerical approach is performed on a one-stage stretch blow-molding machine.
Publication date
AffiliationNRC Industrial Materials Institute; National Research Council Canada
Peer reviewedNo
NRC number54312
NPARC number18399000
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Record identifier6b05b973-20e7-45ca-b8c7-57a81531dc3a
Record created2011-08-17
Record modified2016-05-09
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