Extrudate swell of high density polyethylene. Part III: Extrusion blow molding die geometry effects

1992 ◽  
Vol 32 (23) ◽  
pp. 1755-1764 ◽  
Author(s):  
R. J. Koopmans
Keyword(s):  
High Density Polyethylene ◽  
High Density ◽  
Extrudate Swell ◽  
Die Geometry ◽  
Blow Molding ◽  
Geometry Effects ◽  
Extrusion Blow Molding

scholarly journals STUDY OF DEFECT ON 180 ML HDPE BOTTLES YOGURT PRODUCTS WITH SMC B11 EXTRUSION BLOW MACHINE AT PT X

KREATOR ◽  
2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Tommy Prasetya Kana ◽  
Handika Dany Rahmayanti ◽  
HM Didik
Keyword(s):  
High Density Polyethylene ◽  
Plastic Material ◽  
Production Cycle ◽  
Molding Process ◽  
Plastic Packaging ◽  
Cycle Times ◽  
Blow Molding ◽  
Plastic Bottle ◽  
Extrusion Blow Molding ◽  
Stretch Blow Molding

The type of plastic packaging that is popular in the community is bottle packaging. The plastic material that is generally used to make plastic bottles is High Density Polyethylene (HDPE). The plastic bottle industry in Indonesia usually uses a blow molding process in its production process, where the blow molding process consists of injection blow molding, extrusion blow molding and stretch blow molding. The SMC B11 machine is one of the extrusion blow molding machines used to produce plastic bottle packaging. In producing workpieces, this machine still produces several products that are not in accordance with company standards, including in terms of production cycle times and product defects. Defects or defects that are often encountered include the appearance of spots, bent parison which causes the bottle to bend (the bottle body is thin one side) and blow pin which causes the thread to not fit.Keywords— Bottle, Plastic, Defect, Extrussion Blow Molding

Numerical Optimization of the Parison Thickness of Oil Drum in Extrusion Blow Molding

2014 ◽  
Vol 881-883 ◽  
pp. 1455-1459
Author(s):  
Jian Wang ◽  
Jiong Peng ◽  
Jin Nan Chen ◽  
Jing Li
Keyword(s):  
High Density Polyethylene ◽  
Numerical Optimization ◽  
Production Efficiency ◽  
Thickness Distribution ◽  
Uniform Thickness ◽  
Inflation Pressure ◽  
Isothermal Process ◽  
Minimum Thickness ◽  
Blow Molding ◽  
Extrusion Blow Molding

The optimization parison thickness can reduce the oil drum weight and meet the requirement of the minimum thickness. The profile thickness of the extruded parison can be optimized by simulation. Under different blowing pressures, extrusion blow molding non-isothermal process of the high density polyethylene oil drum with a handle was simulated by using Polyflow. The initial parison was respectively divided into 11, 51, 101 and infinite segments. After seven optimizations, the oil drum wall thickness was equal or larger than 2 mm. An appropriate inflation pressure of 0.6 MPa was obtained. The results show that the production efficiency increases with the inflation pressure increasing. With the parison segments increasing, the oil drum thickness distribution inflated from the optimized parison is more uniform and approaches to the required thickness. The oil drum mass is decreased with the segments increasing. It is necessary that the non-uniform thickness parison was produced by injection molding.

scholarly journals Measurement and Modelling of High Density Polyethylene Melt Extrudate Swell

2008 ◽  
Author(s):  
T. M. Nicholson ◽  
M. T. Martyn ◽  
T. C. B. McLeish ◽  
Albert Co ◽  
Gary L. Leal ◽  
...  
Keyword(s):  
High Density Polyethylene ◽  
High Density ◽  
Extrudate Swell ◽  
Polyethylene Melt
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