PETpla.net Insider 05 / 2011

PREFORM PRODUCTION 19 PET planet insider Vol. 12 No. 05/11 19 Table of Contents i............................................. About the Authors ii..................................................... Introduction chapter 1...................................................AA Level High 2............................................. Accordion Preform 3............................................Air hooks / Streaks 4.................................................... Black Specks 5........................................................... Bubbles 6...................................................... Burn Marks 7..................................Colour Streaking / Peeling 8...................................................... Crystallinity 9..................................................... Drool Marks 10...............................................................Flash 11.............................................. Gate Depressions 12.................................................... Gate Peeling 13...................................... Gate Voids / Pin Holes 14..............................................Internal Gate Sink 15.................................................... Internal Sinks 16.............................................................IV Loss 17.................................................Long Gate Nub 18................................................... Milky Preform 19................................................. Moisture Marks 20.................................... Neck Finish out of Round 21............................................Parting Line Crease 22..................................... Parting Line Deformation 23.............................................. Preform Yellowing 24.......................................................Short Shots 25...............................................................Sinks 26.............................................................. Splay 27................................................Stretched Necks 28..........................................................Stringing 29..............................................Surface Blemishes 30..............................................Thread Flow Lines 31............................. TSS (Top Sealing Surface) Sink 32........................................................... Unmelts 33..................................... Wall Thickness Variation 34......................................................Wavy Body 35.......................................................Weld Lines 8. Ensure the mould neck insert and lock ring vents are clean. This will minimize melt flow resistance due to gas entrapment. 9. Ensure the mould / robot alignment is accurate. 10. Ensure preform handling is not congested at the deposit locations and collection bins. 11. Reduce the robot ejection force to soften the contact of the neck finish with the conveyor. 12. Check to ensure that no moisture exists on the mould- ing surfaces, either from water leaks or condensation. This may obstruct normal melt flow and cause filling problems. The environmental dewpoint should be below the chilled water temperature to eliminate the risk of condensation. 13. Check hardware for worn, damaged or failed compo- nents, specifically the core cooling tubes, and clogged neck insert and core cooling channels. IN EVERY BOTTLE THERE IS ALL OUR KNOW HOW. RESEARCH & DEVELOPMENT A constant projection towards the future oriented to search not only for new materials but also new PET technologies of transformation and innovative materials. CONSULTANCY A concrete answer to all your questions. We put at your disposal all our know-how for every single requirement. PROTOTYPATION Prototypes of containers and innovative preforms in record times: you will be able to touch with your hands the bottles within a short time after approval of the design. DESIGN Creativity in search of elegance and refinement. Innovative designs, ergonomic structures, eye-catching and functional containers. We give a true shape to your product!