To meet the growing demands of the PET packaging industry for heavy‑weight preforms, large multi‑cavity molds and non‑stop mass production, our company has carried out in‑depth iterative optimization based on proven mass‑produced models and launched the brand‑new 660‑ton upgraded Special Injection Molding Machine For PET Materials. As a key heavy‑tonnage upgraded model within the Special Injection Molding Machine Series, this equipment overcomes the common drawback of traditional large‑tonnage machines, which prioritize nominal specifications over long‑term operational stability. Focusing on real‑world wear and tear in large‑scale PET production, it serves as high‑quality Plastic Machinery for upgrading and transformation of large‑scale packaging manufacturers.
Different from ordinary medium‑small molding equipment, the 660‑ton model is built for heavy‑load and long‑term fatigue‑resistant production. Aiming at stress fatigue generated by long‑term high‑pressure clamping and continuous vibration of large‑size Plastic Mold, the whole machine frame and clamping force‑bearing points are structurally reinforced. It optimizes the force distribution across mold plates to eliminate common defects such as cavity offset and slight closing‑gap variation caused by prolonged operation of large molds. When producing multi‑cavity heavy‑weight PET preforms and large‑volume wide‑mouth packaging, it effectively controls individual weight deviation, reduces flash, uneven wall thickness and incomplete forming in batch production, and well satisfies the high‑standard mass‑production requirements of medium‑to‑large packaging enterprises.
Powered by a mature servo‑hydraulic system, it is a high‑performance Servo Energy‑saving Injection Molding Machine. Large‑tonnage PET molding features long production cycles with a high proportion of cooling standby time. Conventional machines maintain constant oil supply throughout the cycle, which easily leads to oil‑temperature buildup, energy waste and process fluctuation. This upgraded version adopts optimized servo dynamic‑response algorithms to intelligently match pressure and flow according to loads during plasticizing, holding pressure, cooling and mold‑opening phases, greatly cutting down unnecessary energy consumption. It also stabilizes hydraulic oil temperature and prevents temperature drift from disturbing PET melting conditions, reducing defects including thermal degradation, whitening and poor transparency from the power‑supply side. Both energy consumption and yield are improved for continuous long‑run production.
The forming quality of PET materials heavily relies on stable overall process conditions; the performance of the main machine cannot be fully unlocked without supporting systems. This injection machine can seamlessly work with complete sets of Plastic Auxiliary Equipment on the production line. When matched with professional auxiliary units such as Drying Machine and Mold Temperature Controller, it builds a standardized PET molding process chain. Precise dehumidification and drying prevent raw‑material hydrolysis and whitening, while constant mold temperature guarantees uniform polymer solidification. This effectively resolves typical problems of thick‑wall large PET products, such as residual internal stress, post‑production deformation and light‑transmission defects, complying with production standards for high‑quality export packaging goods.
For the large plasticizing capacity required by the 660‑ton model, the core plasticizing system is re‑calibrated with PET‑specific process parameters. The customized screw compression ratio is designed for high‑volume melting, adopting a low‑speed and low‑shear‑heat configuration to avoid excessive cracking of PET raw materials in high‑volume continuous production and keep molecular structure stable for every shot. The machine retains ample process compatibility. Besides various PET industrial preforms and food‑grade transparent containers, it can also produce multiple types of high‑transparency plastic parts, balancing specialization and production versatility.
The upgraded electrical control system enhances stability and fault tolerance under heavy‑load conditions to support 24‑hour non‑stop factory operation. Simplified program logic shortens mass‑production debugging and lowers the threshold for mold change and parameter fine‑tuning for large molds. As an Injection Molding Machine iterated for the medium‑to‑large‑tonnage high‑precision packaging market, it addresses industry pain points of large‑tonnage PET equipment, including high energy consumption, fast long‑term precision decay and low process tolerance. It delivers a stable, energy‑saving and low‑maintenance mass‑production solution for large‑scale plastic packaging manufacturers.
