Journal ArticleDOI
An experimental investigation of capillary extrudate swell in relation to parison swell behavior in blow molding
Dilhan M. Kalyon,Musa R. Kamal +1 more
Reads0
Chats0
TLDR
In this paper, an experimental study was carried out to study and characterize the capillary extrudate swell and parison swell behavior in extrusion blow molding of two commercial high density polyethylene resins.Abstract:
An experimental study was carried out to study and characterize the capillary extrudate swell and parison swell behavior in extrusion blow molding of two commercial blow molding grade high density polyethylene resins. The capillary extrudate swell behavior of these resins were determined employing a capillary rheometer and a special thermostatting chamber. Parison swell behavior was determined using an Impco A13-R12 reciprocating screw blow molding machine in conjunction with cinematography and pinch-off. The experimental conditions under which capillary extrudate and parison swell data can be related are elucidated. Excellent agreement is found between the area swell values determined on the basis of capillary and parison swell experiments.read more
Citations
More filters
Journal ArticleDOI
Effect of die geometry and flow characteristics on viscoelastic annular swell
TL;DR: In this paper, the effect of die inclination angle, die gap opening, die contraction ratio, and diverging section length on the swelling characteristics of a high-density polyethylene melt is systematically examined.
Journal ArticleDOI
Effects of molecular structure on the rheology and processability of blow‐molding high‐density polyethylene resins
TL;DR: In this paper, the influence of molecular structure on the rheology and processability of blow-molding grade high-density polyethylene (HDPE) resins is studied using capillary and extensional rheometers, a melt indexer, and a blowmolder unit.
Journal ArticleDOI
Noncontact measurement of parison thickness profiles affected by swell and sag in continuous extrusion blow molding
Robert DiRaddo,A. Garcia-Rejon +1 more
TL;DR: In this paper, a noncontact estimation of parison thickness profiles in continuous extrusion blow molding is proposed, which is based on the measurement of the parison length evolution with time during extrusion, the parisons diameter profile, the flow rate, and the melt temperature gradient along the length of a parison.
Journal ArticleDOI
Extrudate swell of high density polyethylene. Part III: Extrusion blow molding die geometry effects
TL;DR: In this paper, the authors examined the isothermal, time-dependent, and nonisothermal swelling properties of high density polyethylene resins (HDPE resins) from two annular and three diverging dies.
Journal ArticleDOI
Study on extrudate swell of polypropylene in double-lumen micro profile extrusion
TL;DR: In this article, a double convected pom-pom model considering the micro size effect is proposed to characterize viscoelastic properties of the polymer melt, which is compared with experimental results as well as simulations using the power law model for assessing the anisotropic swelling quantitatively.
References
More filters
Journal ArticleDOI
A method for the measurement of the true die swell of polymer melts
TL;DR: In this paper, a new device was designed for the measurement of the die swell of extruded polymer melts, which can be used in conjunction with any capillary type rheometer.
Journal ArticleDOI
Post extrusion swelling of polyethylene
TL;DR: In this article, it was shown that the extent of extrudate swelling depends on the length-to-radius ratio of the capillary even though the viscosity does not.
Journal ArticleDOI
On Numerical Die Swell Calculation
Marcel Crochet,Roland Keunings +1 more
TL;DR: In this article, the authors show the importance of mesh refinement on the analysis and also show that mixed and displacement techniques lead to slightly different results, and that mesh refinement can lead to different results.
Journal ArticleDOI
Isothermal swell of extrudate from annular dies; effects of die geometry, flow rate, and resin characteristics
Nese Orbey,John M. Dealy +1 more
TL;DR: In this article, the effects of die geometry and extrusion velocity on parison swell for three high-density polyethylene blowmolding resins were made of four annular dies: a straight, a diverging, and two converging dies.
Related Papers (5)
Isothermal swell of extrudate from annular dies; effects of die geometry, flow rate, and resin characteristics
Nese Orbey,John M. Dealy +1 more