PETpla.net Insider 04 / 2016

PREFORM PRODUCTION 21 PET planet insider Vol. 17 No. 04/16 www.petpla.net PREFORM PRODUCTION 21 F.l.t.r.: Mahir Aktas, CEO Creative Packaging Solu- tions, Turkey; Reto Bamert, Head of Business Unit PET Netstal Switzerland; Stefan Bock, Manager Appli- cation Technology PET Systems, Netstal Switzerland and Rolf Blaser, Area Sales Manager PET, Otto Hof- stetter, Switzerland using this process. For example, more material can be provided at the injection point, then a thinner area and more material where the legs are going to be later. The process is not just suitable for rotationally symmetrical geometries but it can also produce changes in circumference thickness. This can save material with bottles that are e.g. oval or square. So that the minting pressure is not fed into the robot arm, the plate with the sleeves and the plate with the Mint-Tec units are locked before mint- ing process begins. As the process is part of the cooling time outside the tool, it does not extend the preform cycle time. The technology can be run using the newer generations of the Nestal systems, all you need is a software update. The new process allows for preform geometries that were not hitherto possible in the base area. Besides the controlled material distribution the base area can now also be formed in an elliptical shape so that the preform’s vertical area is as large as possible in the stretch blow moulding machine’s heating up area and therefore the base area is also heated up as optimally as possible. A little pin can also be formed inside the preform base by using the minting head, where the stretch punch engages during stretch blow moulding. As a result any off- centre injection points are ruled out in the bottles’ base area. Due to the equalised PET material distribution in the bottle base a lower high pres- sure level can be achieved. Main advantages of the Mint-Tec preforms are the lower wall thickness in the bottle base which leads to a faster cycle time of the blow moulding machine. www.mint-tec.com www.mht-ag.de www.netstal.com www.otto-hofstetter.ch Digital humanism. 4.0 IDENTITY www.mo r e t t o . c om Global assistance Integrated communication Rational use of energy Smart advanced solutions