EFFECTS OF EXTRUSION BLOW MOLDING INTERNAL COOLING ...

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KEY TO SYMBOLS AND ABBREVIATIONS B v – Bottle Volume (mL) B e – Weight of Bottle Empty (grams) B f – Weight of bottle full of water (grams) DSC – Differential Scanning Calorimeter HDPE – High Density Polyethylene ∆H f – Heat of fusion of semi-crystalline polymer found using DSC in J/g ∆H f * - Heat of fusion of 100% crystalline sample in J/g J – Joules – Energy measurement g – grams – Mass measurement in – inches – Distance measurement mL – Mililiters – Volume measurement SCRU – A proprietary unit representing revolutions of the Extruder screw used by the motor drive on the Bekum Blow Molder x
1 – INTRODUCTION AND LITERATURE REVIEW 1.1 Need for Development Blow molding machines are used for the production of parts in many industries including packaging and automotive. Packaging, however, is the single largest user of blow molded thermoplastic containers in the US with approximately 70 percent of market (Rosato et. al., 2004). The rigid and semi-rigid plastic packaging industry is an economic power that comprises 21 percent of the $115 billion packaging industry (Ernst and Young, 2002). Plastic containers alone totaled $11.4 billion dollars in 2001. Plastic bottle demand grows by more than four percent each year and is expected to reach 11 billion pounds by 2006 as shown in Figure 1. Figure 1. Current and Projected US Plastic Container Demand (Freedonia Group, 2002) U.S. Plastic Container Demand Billions of Pounds 12 10 8 6 4 2 6.7 8.8 11 Bottles Pails Tubs and Cups Other 0 1996 2001 2006 1
Page 1 and 2: 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: Figure 24. Assembly Drawing........
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 and 58: performance tests. It would be desi
Page 59 and 60: 5.8 Optical Microscopy Optical micr
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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