Pet Preform Mould Production Cycle

PET preforms, better known as preforms, are completed by a molding process. The molten PET injected into the Pet Preform Mould becomes a preform that is in the form of a bottle for a basic beverage, oil or detergent by an additional processing step (blowing). The preform is made from a "bottle" (bottleneck) and does not change during the blow molding process. The "smooth" diameter and thread type are the main features of the preform, which determine the type of screw cap and the purpose of the bottle (for still water, soda, oil, milk). On the other hand, the tubular structure will form the bottle during the blow molding and molding process and determine the basis weight of the final product; diameter, length and shape are key elements that give the blown container the main characteristics. The PET polymer used to produce the preform has no color and is almost transparent, but once mixed with the colorant, it can have different shades of color depending on the customer's requirements. warehouse The polymer is transported in tankers or large bags. Once the material enters the factory, it is transported to 19 storage silos and removed from the silos according to production requirements. Polyester drying PET essentially absorbs the humidity in the atmosphere, and in order to get the perfect product, it must undergo drying and dehumidification processes. The process consists of maintaining a storage bin connected to the feed of the PET machine for a period of time (this may vary depending on the nature of the PET, ranging from 4 to 10 hours), during which time a hot air flow of 170 degrees is used. Heat it. Air heating is produced by a system that uses hot oil heated by a heat exchanger that is connected to a group of cogeneration power generation. Plasticization of pets Once the dried PET is delivered through the screw in the injection chamber. At this stage, the PET is heated to a temperature of about 285 and is in a lamination stage from solid (particles) to liquid. Prior to entering the cochlea, the granules can be mixed with a specific amount of color in a premixer through a premixer to provide color according to customer requirements. Injection molding. The liquid PET is delivered by a rotating screw in the injection chamber to fill the entire cavity mounted on the mold. When the mold is closed, molten PET is injected into the cavity and, once contacted with the substrate, solidifies and forms. The temperature of the cavity and the punch is cooled by a system that allows the PET to cure before it is discharged from the mold through the extractor system. The China Pet Bottle produced by Jilian Plastic has this rigorous and comprehensive design and production process to ensure that our products can guarantee a high quality.