EFFECTS OF EXTRUSION BLOW MOLDING INTERNAL COOLING ...

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container size and volume on cooling time and container shrinkage is recommended. 5.5 Environmental Stress Cracking Another important test which could be run on these containers is an environmental stress cracking test. Comparisons could be made between the two manufacturing methods following the test procedures outlined in ASTM D2561-95, Environmental Stress-Crack Resistance of Blow-Molded Polyethylene Containers. 5.6 Impact Testing Impact testing of HDPE containers is difficult through standard testing methods including ASTM D 2463-95 Drop Impact Resistance of Blow-Molded Thermoplastic Containers. The problem lies in the incredibly high inherent strength of the materials. Preliminary testing failed to produce any impact failure at all. Possible solutions to this problem could include freezing of the containers before testing to increase brittleness. 5.7 Torque Testing The different manufacturing methods could potentially produce different results in closure torque testing. Application and removal torque could be tested for each of the containers. 48
5.8 Optical Microscopy Optical microscopy is another method for analyzing the physical composition of a container including crystallinity by observing crystalline regions. 5.9 Permeability Testing Permeability could be conducted on different containers produced by the machine. 5.10 Resin Various resins could be tested in this machine with the current setup. The current extruder screw is capable of running polyethylene including HDPE and LDPE as well as polyethylene blends. Further information could be obtained from Bekum America regarding the compatibility of this screw for other materials as well as possibly acquiring a new screw capable of a wider array of material compatibility. 49
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EFFECTS OF EXTRUSION BLOW MOLDING I
Page 3 and 4:
Copyright by Kirk Alan Valko 2004
Page 5 and 6:
TABLE OF CONTENTS LIST OF TABLES ..
Page 7 and 8: LIST OF TABLES Table 1. Fasti Cost
Page 9 and 10: Figure 24. Assembly Drawing........
Page 11 and 12: 1 - INTRODUCTION AND LITERATURE REV
Page 13 and 14: The process of extrusion blow moldi
Page 15 and 16: and dropped onto the conveyor, the
Page 17 and 18: Internal cooling is the process of
Page 19 and 20: pin is entering the bottle finish.
Page 21 and 22: 1.3.3 Costs Total cost of the unit
Page 23 and 24: Figure 7. Machine Surround Before F
Page 25 and 26: Table 2. Effect of Decreased Crysta
Page 27 and 28: 1.4.2 Wall thickness In addition to
Page 29 and 30: 2 - EXPERIMENTAL DESIGN AND TEST ME
Page 31 and 32: to determine the connection between
Page 33 and 34: 2.2 Experimental Methods 2.2.1 Samp
Page 35 and 36: Average temperature, checked by the
Page 37 and 38: Table 5. Bottle Body Dimension Tole
Page 39 and 40: D 2659, 1995). Twenty samples from
Page 41 and 42: Figure 15. Compression Data Example
Page 43 and 44: Figure 16. DSC Sample Pan Crimper T
Page 45 and 46: 3 - DATA AND RESULTS 3.1 Cycle time
Page 47 and 48: Table 7. Dimensional Test Result Co
Page 49 and 50: 3.3 Compression Strength Compressio
Page 51 and 52: Table 10. Percent Crystallinity of
Page 53 and 54: Table 12. Percent Crystallinity at
Page 55 and 56: wall thickness. Compression strengt
Page 57: performance tests. It would be desi
Page 61 and 62: 51 APPENDIX A Dimensional Results T
Page 63 and 64: 53 Table 15. Dimensional Test Resul
Page 65 and 66: Figure 18. Conventional Wall Thickn
Page 67 and 68: Figure 22. Fasti Wall Thickness 2 0
Page 69 and 70: Table 18. Compression Test Results
Page 71 and 72: Bekum Blow Molder Operating Instruc
Page 73 and 74: a) “SP1”(set point one) tempera
Page 75 and 76: i) Only one function may be used at
Page 77 and 78: ) Use Screwdriver to turn catch abo
Page 79 and 80: Figure 25. Detail 01 - Adaptor 69
Page 81 and 82: Figure 27. Detail 03 - Cooling Slee
Page 83 and 84: Figure 29. Detail 05 - Tip 73
Page 85 and 86: APPENDIX E Fasti Setup Experiment E
Page 87 and 88: Data Analysis Figures 31, 32, and 3
Page 89 and 90: Figure 31. Main Effects Plot for Fa
Page 91 and 92: BIBLIOGRAPHY ASTM Standard D2463-95
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EFFECTS OF EXTRUSION BLOW MOLDING INTERNAL COOLING ...

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