The molten polymer is fed into a manifold where it is injected through nozzles into a hollow
The finished article is stripped off the core rod prior to sending it as a packing material. The credit for this has been attributed to the injection blow moulding process that produces bottles of superior visual and dimensional quality vis-Ă -vis extrusion blow moulding. On completion of the cooling period, the blow mould opens and the core rod is rotated to the ejection position.
There are three sets of core rods, which allow concurrent preform injection, blow moulding and ejection. The injection blow moulding machine is based on an extruder barrel and screw assembly which melts the polymer. By and large, the credit for this success rests solely on the PET Preform Bottle Industries, since it is this product that ensures the intended mode of packaging is perfect. To accurately check every single mold on certain parameters, reputed companies like the one in New Delhi mentioned above have modernised testing lab that is well China SMC mould for sale equipped with ultra modern testing machines, latest tools, and advanced instruments to hasten process.
And the result was the first bottle type containers initiating the exploitation of PET as a lightweight, tough, unbreakable substitute for the glass bottle. It is is tested for leaks, known as barrier proofs. The molten polymer is fed into a manifold where it is injected through nozzles into a hollow, heated preform mould. Later, the preform mould opens and the core rod is rotated and clamped into the hollow, y a process named chilled blow mould. It was similar to inflating a balloon in a shaped mould. However, as per the end-user’s needs, these can be designed and developed including refurbishments. Since then this process has been accepted worldwide as ideal for both narrow and wide-mouthed containers.
The preform consists of a fully formed bottle/jar neck with a thick tube of polymer attached, which will form the body. This preform mould forms the external shape and is clamped around a mandrel (the core rod) which forms the internal shape of the preform. This technique of Pet Preform Moulds Inserts became popular for mass production of hollow objects like bottles, jars and assorted containers. The preform and blow mould can have many cavities, typically three to sixteen depending on the size of the article and the required output.