EFFECTS OF EXTRUSION BLOW MOLDING INTERNAL COOLING ...

TABLE OF CONTENTS
LIST OF TABLES ................................................................................................vii
LIST OF FIGURES .............................................................................................viii
KEY TO SYMBOLS AND ABBREVIATIONS........................................................ x
1 – INTRODUCTION AND LITERATURE REVIEW ............................................. 1
1.1 Need for Development ............................................................................... 1
1.2 Extrusion Blow Molding .............................................................................. 2
1.2.1 Process............................................................................................... 2
1.3 Fasti System .............................................................................................. 8
1.3.1 Recirculating blow pin ......................................................................... 8
1.3.2 Cooling system ................................................................................. 10
1.3.3 Costs................................................................................................. 11
1.3.5 Installation......................................................................................... 12
1.3.4 Efficiency........................................................................................... 14
1.4 Objective .................................................................................................. 14
1.4.1 Crystallinity........................................................................................ 14
1.4.2 Wall thickness ................................................................................... 17
1.4.3 Dimensionality................................................................................... 17
1.5 Hypothesis ............................................................................................... 17
1.6 Statistical Methods ................................................................................... 18
2 – EXPERIMENTAL DESIGN AND TEST METHODS...................................... 19
2.1 Materials and Setup ................................................................................. 19
2.1.1 Conventional Air Setup ..................................................................... 19
2.1.2 Fasti Cold Air Setup .......................................................................... 20
2.1.3 Controls (Constants) ......................................................................... 22
2.2 Experimental Methods.............................................................................. 23
2.2.1 Sampling ........................................................................................... 23
2.2.2 Conditioning ...................................................................................... 24
2.2.3 Dimensional ...................................................................................... 25
2.2.4 Compression Testing ........................................................................ 28
2.2.5 Differential Scanning Calorimetry...................................................... 31
3 – DATA AND RESULTS.................................................................................. 35
3.1 Cycle time improvements ......................................................................... 35
3.2 Dimensionality.......................................................................................... 35
3.3 Compression Strength.............................................................................. 39
3.4 Crystallinity............................................................................................... 40
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