PETpla.net Insider 06 / 2012

PREFORM PRODUCTION 13 PET planet insider Vol. 13 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. 6. Check all temperature readings and adjust higher if necessary. PET resin should be melted at about 280ºC (536ºF) +/- 10ºC (18ºF). Increase as nec- essary to improve melt flow. 7. Check for leaking core-air blow valve. Air pressure in the cavity during filling may restrict proper melt flow. 8. Ensure the core-air blow has a clean and moisture-free air supply to minimize the risk of contamination in the thread area. 9. Check to ensure that no moisture exists on the moulding surfaces, either from water leaks or condensation. This may obstruct normal melt flow and cause fill- ing problems. The envi- ronmental dewpoint should be below the chilled water tempera- ture to eliminate the risk of condensation. 10. Check hardware for worn, damaged or failed components, specifically the mould neck inserts (collapsed vents), lock ring vents, and lock ring / core parting line. 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!