ROTATIONAL MOULDING Guide

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ROTATIONAL MOULDING Guide ( rotational-moulding-guide )

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6 ROTATIONAL MOULDING TABLE OF CONTENTS INTRODUCTION GRADE SELECTION FOR ROTATIONAL MOULDING Effect of Melt Flow Index and Density Effect of Comonomer on Crack Resistance Weather Resistance Thermal Stability Colouring POWDER PRODUCTION AND PROPERTIES ROTATIONAL MOULDING PROCESS TECHNOLOGY Stage 1 – The Mould Charging or Loading Step Stage 2 – Mould Heating Cycle Stage 3 – Mould Cooling Cycle Stage 4 – Demoulding or Extracting the Moulding ROTATIONAL MOULDING EQUIPMENT Types of Equipment Rotation Speeds Mould Construction Mould Venting Modified Moulds Mould Release Agents Secondary Finishing Operations PROCESSING PARAMETERS The Heating Cycle The Optimum Heating Phase The Cooling Cycle PROPERTIES OF ROTATIONAL MOULDINGS Stiffness/Rigidity Toughness (Impact Resistance and ESCR) Shrinkage Distortion or Warping Chemical Resistance HANDLING PRECAUTIONS APPENDIX 1 – ROTATIONAL MOULDING TROUBLESHOOTING GUIDE BIBLIOGRAPHY/FURTHER READING 4 4 4 4 5 5 6 7 9 9 9 10 10 10 10 11 11 12 12 12 12 13 13 14 15 16 16 16 16 16 17 17 18 19 2 Qenos Technical Guides

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ROTATIONAL MOULDING Guide

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