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Introduction 1
Steady State and Non-Steady State Technological Processes 5
Definitions 5
The Technological Process 5
Dynamics, Process Dynamics 7
Modelling of the Steady State Melt Spinning Process 10
Goal of Modelling 10
Balance Equations 11
Example: Heat Transfer 12
Modelling of Non-Steady State Dynamic Process 13
System and Signal 13
Model 14
Characterisation of the Dynamic Process Behaviour 16
Differential Equation 16
Description in the Time Range; Step Response 16
Description in the Frequency Range 17
Correlation and Power Density Spectrum Functions 21
Dynamic Process Analysis and Modelling 26
Methodical Procedure 26
Detailed Example (Drawing Process) 30
Modelling of Steady State Fibre Formation Process in Melt Spinning 43
Steady State Single Fibre Formation Process 43
Definition: What Does Fibre Formation Mean? 43
Fundamental Balance Equations 44
Interaction Between Fibre and Environment 52
Response of the Polymer Melt 59
Structure Development 65
Material Properties of Spinnable Polymers 70
Practical Modelling: Simulation of Fibre Formation 78
Multifilament Spinning 90
Peculiarities in Multifilament Spinning 90
Models of Interaction Between the Fibre Bundle and the Environment 93
Continuum Theory 95
Example 1: Numerical Simulation of Fibre Formation in the Staple Fibre Melt Spinning Process 112
Example 2: Modelling of Fibre Formation in the Spunbonded Nonwoven Process 124
Summary 131
Limits and Spinnability 132
Maximum and Minimum Fineness 132
Visco-elastic Failure and Nonlinear Effects 138
Dynamics of Fibre Formation Processes 145
Task 145
Melt Spinning of Polymers 146
Variable Fibre Fineness 146
Variable Fibre Orientation 166
Complex Proceedings in the Fibre Formation Distance 170
Glass Fibre Spinning; Variable Fibre Fineness 170
Cause-Effect-Scheme 170
Functional Block Diagram 172
Evaluation and Results 177
Dynamics of Fibre Formation in the Spun Yarn Spinning Process 182
Task 182
Dynamic Transfer Behaviour of Carding Engines 182
Dynamic Transfer Behaviour of Drafting Zones in Drafting Systems 189
Necessary Measuring and Gauge Lengths 204
Dynamics of Fibre Processing Processes 209
Dynamics of the Fibre Transport 209
Task 209
Dynamic Model to the Description of a Delay Thread Line 210
Dynamic Model to the Description of a Dead Time Thread Line 211
Dynamic Model to the Description of a Friction Thread Line 213
Examples of Quantitative Investigations of Fibre Transport Processes 216
Dynamics of the Twist Transfer at the False Twist Texturing 241
Task 241
Mathematic-Dynamic Model 242
Dynamics of Fibre Heating and Cooling 258
Task 258
Differential Equation for the Description of Heat Transfer at Fibres 259
Technological Application Examples 265
Dynamics of the Tensile Force and its Importance for Process Stability 277
Task 277
Connection Between Fibre Fineness and Fibre Tensile Force Variations 280
Dynamic Properties of Measuring Sensors 282
Evaluation of the Tensile Force Time Function 285
Stationary Evaluation 285
Dynamic Evaluation; Auto Correlation and Auto Power Density Spectrum Functions 287
Combination Measurements and Evaluations 301
Task and Measurements 301
Dynamic Evaluation and Cross-Correlation Functions (CCF) 303
References 311
List of Symbols 327
Index 347
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Add Dynamics of Fibre Formation and Processing: Modelling and Application in Fibre and Textile Industry, This practice-oriented book deals with the modelling of steady state and non-steady state basic processes of fibre formation and fibre processing. Focal points are melt spinning processes, spun yarn spinning processes and the description of the dynamics i, Dynamics of Fibre Formation and Processing: Modelling and Application in Fibre and Textile Industry to the inventory that you are selling on WonderClubX
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Add Dynamics of Fibre Formation and Processing: Modelling and Application in Fibre and Textile Industry, This practice-oriented book deals with the modelling of steady state and non-steady state basic processes of fibre formation and fibre processing. Focal points are melt spinning processes, spun yarn spinning processes and the description of the dynamics i, Dynamics of Fibre Formation and Processing: Modelling and Application in Fibre and Textile Industry to your collection on WonderClub |