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Effect of melt temperature on the final thickness distribution of blow moulded parts
Author(s) -
Drraddo R. W.,
GarciaRejon A.
Publication year - 1993
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450710523
Subject(s) - blow molding , extrusion , bottle , materials science , composite material , mold
The extrusion blow moulding process is becoming increasingly important in the polymer industry. Parison programming is a crucial component of the extrusion blow moulding process, since it allows for the optimization of resin usage in a given part. However, the inflation of programmed (variable thickness) parisons is very complex and is not a well understood phenomenon. The goal of this work is to present some experimental results demonstrating the effects of melt temperature on the inflation of programmed parisons. The inflation of parisons into a non‐axisymmetric motor oil bottle is considered. Four parison thickness profiles are studied. These are (i) low magnitude constant thickness, (ii) high magnitude constant thickness, (iii) one step high to low magnitude thickness and (iv) two step low to high to low magnitude thickness. Three melt temperatures were used; 180, 200 and 220°C.