The cooling process of the preforms is highly important already during the injection molding phase as this prevents the preform from crystallization. In this process, between 32 and 96 preforms are produced in every cycle, depending on which tool is used. The plasticized material is injected into a preform tool, which is cooled with 6☌ cold water. Only then it can be further processed to become a PET preform. This heating process is important as it enables the material to become a homogenous mixture in the first place. There it is heated until a temperature of 280☌ is reached.
The pre-dried granulate is fed to the injection molding machine through another pipe system. After the pre-drying phase, the actual production starts. As soon as the material has fallen below a certain moisture content, it can be further processed. There it stays between 6 to 8 hours and is heated up by dry air (dew point – 30☌) until a temperature of 170☌ is reached. When production starts, the granulate is transported to the drying unit of the machine through a pipe system. There it is protected from rain and solar radiation.
After the granulate has been delivered, it is stored in silo facilities until it is needed. The PET preforms are produced in our production premises in Reichersdorf using state-of-the-art injection molding machines. The first step consists of predrying, injection molding and cooling. The second step produces the final PET bottles using a stretch blow molder. As a first step, the PET granulate becomes the preform using state-of-the-art injection molding machines.
The production of PET bottles is a split process that requires diligence as well as careful quality control. Come and join us, one of the leading Austrian producers, on the way through the production process Have you ever wondered how PET bottles are produced? Few consumers actually know where PET bottles come from and how they are made.
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