PETpla.net Insider 05 / 2012

PREFORM PRODUCTION 17 PET planet insider Vol. 13 No. 05/12 www.petpla.net PET planet print vol.6 The Rapid Guide to Perfect Preforms machine no./name 1- 3 exemplar each 129,- € 4 - 10 exemplar each 99,- € > 10 exemplar each 69,- € prices in EUR + VAT. 5. Check that the hold (packing) time isn’t too little for the preform being moulded. Increase as necessary to improve solidification. 6. Check that the hold (packing) pres- sure isn’t too low. Higher pressures will improve cooling by maintaining good con- tact with the moulding surface and by increas- ing the melt density. Increase as necessary. 7. Check all temperature readings and correct if necessary. PET resin should be melted at about 280ºC (536ºF) +/- 10ºC (18ºF). Reduce as necessary. 8. Check that the mould core half (moving platen side) doesn’t drop slightly during the unclamp and initial mould open sequence. This could scratch the bottom surface of the preforms. 9. Check that no anoma- lies are present on the moulding surfaces and robot cooling recepta- cles. Repair if neces- sary. 10. Ensure the mould / robot alignment is accurate. 11. Ensure preform han- dling is not congested at the deposit locations and collection bins. 12. Ensure no abrasive objects contact the pre- forms during handling. 13. Check hardware for worn, damaged or failed components, specifically clogged core / cavity cooling channels, robot recep- tacle cooling channels, conveyor obstructions, and turbulent down- stream handling. www.petpla.net PETplanet print Vol. 6: The Rapid Guide to Perfect Preforms by Rick Unterlander and Ottmar Brandau fax: +49 (0) 6221-65108-28 info@hbmedia.net www.petpla.net Order your copy now! With a long story in packaging engineering SIPA can support its customers on lightweight preform development as well as preform lightweight conversions on existing mold. SIPA has developed specific neck ring design solutions for an optimal cooling and cycle time, even in case of short preform and neck finish conversion. SIPA provides complete preform mold for any PET system (up to 96 cav.), cold half for existing hot half (up to 144 cav.), hot half for existing cold half (up to 96 cav.); furthermore it provides conversions of existing mold (full or partial kits), mold spare parts and refurbishment. All SIPA preform molds feature LongLife ™ , a new design engineered to extend the mold service life. LongLife ™ PET preform molds with strong focus on lightweight. www.sipa.it