![]() ![]() The mould takes the shape of the preform that you want.Ĭooling – after the molten PET settles in the cavities, it's now time to cool them so that they can change into a solid state. Moulding by Injection - at this point, we have the PET in the molten form and using a rotating screw as a conveyer, you need to have the cavity installed on the mould. You can do this by passing the granules through a pre-mixer so that they can be mixed with the colourant. It is at this moment that you determine the colour of the preform you are going to realize by adding the colourant of your choice. At this stage, the PET virgin material will transform from granules (Solid-state) to a molten form (Liquid State). You can achieve this by heating the virgin material in the chamber at a temperature of about 285☌. Plasticizing the PET Material – after drying and conveying the virgin material into the injection chamber, you now need to turn the material into a molten state. The rate of the moulding machine operation is measured in output per hour. ![]() ![]() Here you need to set your moulding machine at an output rate depending on your production capabilities. In the second stage, you need to employ a hopper dryer.Īt this stage, you can also employ the services of a dehumidifier (Optional) as it reduces the drying period.Ĭonveying – after drying, your virgin material is now ready for you to start the PET Production. At this point, you need a 2-stage drying on the first stage, a crystallizer is needed to make sure that the original (Virgin) material will not form clumps when drying. However, the drying period will depend on the moisture content of the virgin material.Īt other times, the virgin material may be transparent. Have the virgin material dried at a temperature range of 150☌ to 170☌ for a period of 4-6 hours. Here, you need either a standard hopper or an insulted hopper dryer. PET Drying – sometimes the virgin material/polymer is milky white, and in this case, you need to have it dried. You can store the polymer in silos and release it depending on the quantity of the preform you are producing. You need to have the polymer transported and stored in a place, say, your company, where you are going to use it. Storage – you need to understand that the PET Preform is produced from a virgin material (Polymer) as a raw material. If you wish to understand a stepwise process of PET production, here is the guide ![]()
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