LEADER 05335nam 2200661 a 450 001 9911004846603321 005 20200520144314.0 010 $a0-08-094600-3 010 $a9786612011474 010 $a0-8155-1888-9 010 $a1-282-01147-2 010 $a1-282-02740-9 010 $a0-08-095052-3 010 $a0-8155-1893-5 035 $a(CKB)111056552542920 035 $a(EBL)566683 035 $a(OCoLC)700919052 035 $a(SSID)ssj0000072923 035 $a(PQKBManifestationID)12006791 035 $a(PQKBTitleCode)TC0000072923 035 $a(PQKBWorkID)10103808 035 $a(PQKB)10755934 035 $a(MiAaPQ)EBC566683 035 $a(EXLCZ)99111056552542920 100 $a20010525d2002 uy 0 101 0 $aeng 135 $aur|n|---||||| 181 $ctxt 182 $cc 183 $acr 200 10$aRotational molding technology /$fRoy J. Crawford, James L. Throne 210 $aNorwich, N.Y. $cPlastics Design Library/William Andrew Pub.$dc2002 215 $a1 online resource (419 p.) 225 1 $aPlastics Design Library 300 $aDescription based upon print version of record. 311 $a1-4557-7562-2 311 $a1-884207-85-5 320 $aIncludes bibliographical references and indexes. 327 $aFront Cover; Rotational Molding Technology; Copyright Page; CONTENTS; CHAPTER 1. INTRODUCTION TO ROTATIONAL MOLDING; 1.0 Introduction; 1.1 The Process; 1.2 The Early Days; 1.3 Materials; 1.4 Advantages and Disadvantages; 1.5 General Relationships between Processing Conditions and Properties; References; CHAPTER 2. ROTATIONAL MOLDING POLYMERS; 2.0 Introduction; 2.1 General Characteristics of Polymers; 2.2 Polymers asPowdersand Liquids; 2.3 Polyethylene Types; 2.4 Polypropylene; 2.5 PVC-Plastisols, Drysols, and Powdered Flexible Compounds; 2.6 Nylons; 2.7 Other Polymers; 2.8 Liquid Polymers 327 $a2.9 In-Coming MaterialEvaluation2.10 Product Testing Protocols and Relationship to Polymer Characteristics; 2.11 Desirable Characteristics of a Rotational Molding Resin; References; CHAPTER 3. GRINDING ANDCOLORING; 3.0 Introduction; 3.1 General Issues Relatingto Grinding; 3.2 Particle Size Distribution; 3.3 Particle Shape; 3.4 Dry Flow; 3.5 Bulk Density; 3.6 Factors Affecting Powder Quality; 3.7 Grinding Costs; 3.8 Micropelletizing; 3.9 Polyvinyl Chloride; 3.10 Coloring of Plastics for Rotational Molding; References; CHAPTER 4. ROTATIONAL MOLDING MACHINES; 4.0 Introduction 327 $a4.1 Types of Rotational MoldingMachines4.2 Machine Design Considerations; 4.3 The Oven; 4.4 Cooling; 4.5 Process Monitors; 4.6 Servicing; 4.7 Advanced Machine Design; References; CHAPTER 5. MOLD DESIGN; 5.0 Introduction; 5.1 Mold Materials; 5.2 Mechanical and Thermal Characteristics of Mold Materials; 5.3 Mold Design; 5.4 Calculation of Charge Weight; 5.5 Venting; 5.6 Mold Surface Finish; 5.7 Mold Releases; References; CHAPTER 6. PROCESSING; 6.0 Introduction to Heating; 6.1 General Anatomy of the Rotational Molding Cycle; 6.2 General Process Description; 6.3 Powder Behavior 327 $a6.4 Characteristics of Powder Flow6.5 Rheology of Powder Flow; 6.6 Heat Transfer Concepts Applied to Rotational Molding; 6.7 Heating the Mold; 6.8 Heating Powder; 6.9 Tack Temperature; 6.10 Mold Cavity Air Heating Prior to Powder Adhesion to Mold Surface; 6.11 Bed Depletion; 6.12 Particle Coalescence; 6.13 Densification; 6.14 Phase Change During Heating; 6.15 The Role of Pressure and Vacuum; 6.16 Mathematical Modeling of the Heating Process; 6.17 Total Oven Cycle Time; 6.18 Cooling and the Optimum Time for Removal from Oven; 6.19 Some Comments on Heat Transfer During Cooling 327 $a6.20 Thermal Profile Inversion6.21 Cooling and Recrystallization; 6.22 Air Cooling - Heat Removal Rate; 6.23 Water Cooling - Heat Removal Rate; 6.24 Pressurization; 6.25 Part Removal; 6.26 Effect of Wall Thickness on Cooling Cycle Time; 6.27 Overview and Summary of Thermal Aspects of the Rotational Molding Process; 6.28 Introduction to Liquid Rotational Molding; 6.29 Liquid Polymers; 6.30 Liquid Rotational Molding Process; 6.31 Process Controls for Liquid Rotational Molding; 6.32 Foam Processing; References; CHAPTER 7. MECHANICAL PART DESIGN; 7.0 Introduction; 7.1 Design Philosophy 327 $a7.2 General Design Concepts 330 $aThis book clarifies and quantifies many of the technical interactions in the process. It distinguishes itself from other books on the subject by being a seamless story of the advanced aspects of the rotational molding process. There are seven chapters within the book. The US market for rotational molding products was one billion pounds in the year 2000. The growth of the rotational molding industry has grown at 10 to 15% per year. With this growth has come an increasing need for details on the complex, technical aspects of the process. 410 0$aPlastics Design Library 606 $aRotational molding of plastics 615 0$aRotational molding of plastics. 676 $a668.4/12 700 $aCrawford$b R. J$g(Roy James),$f1949-$01824580 701 $aThrone$b James L.$f1937-$019304 801 0$bMiAaPQ 801 1$bMiAaPQ 801 2$bMiAaPQ 906 $aBOOK 912 $a9911004846603321 996 $aRotational molding technology$94392623 997 $aUNINA