![]() Excellent hardness, excellent polish, rust resistance and precision make it an excellent choice for making molds. The universal standard nozzle is made with premium grade nitrided steel to increase its durability and hardness at the same time.ĪSSAB s136 or DIN 1.2316 steel is used for forming and inserting molds and for sliding inserts because the steel has the best quality and precision available. More than 2.5 million injections of preforms of the same quality during the use of the mold The preform mold construction, which is developed based on the latest technological advances, is designed in the European mold style. The number of holes in PET preform injection molds is between 1 and 96. ![]() Among our capabilities is our ability to produce a range of plastic preforms. The skilled workforce that specializes in more than one sector for Pars Company ensures the creation of molds with unique features for different types of PET plastic preforms. It is also possible to customize the preform mold assembly of the PET injection machine to meet the specific needs of the customer, as well as to custom manufacture each PET preform according to their needs. We look forward to your call to get your preform injection mold to market quickly and with minimal hassle. We want to be your one stop shop for all your preform needs, so give us a call today. Undoubtedly, Pars Company can produce a complete set of preform PET molds on time and accurately and at the best possible price. As a result, we have developed considerable knowledge and expertise that allows our company to offer customers the highest level of skill, knowledge and commitment in the plastic injection molding machine and PET preform molds market. Pars company has had considerable experience in the plastic injection industry in the last ten years. We use state-of-the-art technology to create PET preforms and pride ourselves on our fast and easy delivery process. We understand that you want preform PET injection molds that are of the highest quality, and that’s why we offer our customers a quick and easy way to get the job done. There are a number of companies that offer PET robots for machines that don’t have them.Looking for a quick and easy way to deliver your preform PET injection mold? We offer fast delivery, convenient service, and excellent service so you can get your PET preform injection molds done quickly and with less headache. This helps, but robotic machines with three servo-driven takeout stations cut cycle times easily by 40%. The latter machines can be adjusted to eject the parts while the mold is opening so that the only waiting time is for the ejectors to move back. Extremely fast robot speeds allow the mold open/close sequence to be as quick as those for free-drop machines. Robotic takeout or free-drop: Machines with three, four, or even six post-mold cooling stations allow removal of preforms from the mold as soon as they are cold enough that they won’t buckle (around 160 C, or 320 F). ![]() It should be adjusted to get the desired demolding temperature. Cooling time should be a minimum of 1.5 sec but can be as high as 20 sec for very thick preforms. This shrinkage is important to allow the preform to be easily removed when the cores move away from the cavities. The preform now shrinks away from the cavity and onto the core and cooling is less efficient. Very thin preforms do this a lot because with cavity channels as low as 2 mm (0.080 in.), almost half of the preform weight sticks to the cold mold walls and is already at or close to solid density by the time injection is finished.Ĭooling time: As soon as the preform is sufficiently cooled to avoid sink marks, the machine can switch over to cooling time. However, preforms already cool down as they are being injected. This difference is about 13%, and for many years we taught to move the transition or switchover point to the 13% mark of the total injection stroke. Hold Time: The purpose of hold time is to supply resin that is needed to fill out the voids in preforms as they shrink from a melt density of 1.15 g/cm3 to the solid density of 1.33 g/cm3. For example, a 525 g preform with a wall thickness of 8.5 mm (0.335 in.) can be filled at 27 sec, resulting in a fill speed of 19.4 g/sec/cavity. However, thicker preforms can be filled much quicker, as it is easier for the resin to be pushed through the tool channels. This works well for preforms up to about 4-mm wall thickness. Injection time: Resin suppliers suggest a fill speed of 8 to 12 g/sec/cavity.
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