중국 고성능 사출 성형 기계 공급 업체

PET 사출 성형기

» PET 사출 성형기

PET 프리폼 사출 성형기와 표준 사출 성형기의 차이점은 무엇입니까?

A professional PET 프리폼 사출 성형기 differs fundamentally from a general-purpose standard injection molding machine, PET 수지의 특수한 물리적, 화학적 특성에 맞게 독특하게 설계되었기 때문입니다.,

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명세서

A professional PET 프리폼 사출 성형기 differs fundamentally from a general-purpose standard injection molding machine, PET 수지의 특수한 물리적, 화학적 특성에 맞게 독특하게 설계되었기 때문입니다., 일반 기계가 완전히 수용할 수 없는 것. PET 소재는 흡습성이 우수합니다., 민감한 열분해, 낮은 용융 점도, 가소화 균일성 및 성형 속도에 대한 엄격한 요구 사항, all of which demand specialized machine configurations. First and foremost, the plasticizing system is completely different. PET preform machines are equipped with a dedicated low-shear screw and barrel with a length-to-diameter ratio of 24:1 에게 26:1, featuring shallow screw grooves and no dead-angle design. This structure avoids excessive shearing force that causes PET molecular chain breakage, effectively preventing melt yellowing, carbonization, and transparency reduction during high-temperature processing. 대조적으로, standard injection machine screws are designed for universal plastics like PP and ABS, generating excessive shear heat that easily degrades PET materials and produces defective preforms with yellow streaks and haze. 두 번째로, the temperature control system of PET 프리폼 기계 supports multi-stage precise PID constant temperature control, covering the barrel, 대통 주둥이, and mold adapter with a temperature error controlled within ±1°C. Since PET processing temperature ranges from 260°C to 285°C, even minor local overheating will trigger acetaldehyde proliferation and material aging, a problem that ordinary machines with rough temperature control cannot avoid. 게다가, PET preform production requires high-speed thin-wall filling and high-rigidity clamping to ensure uniform mold locking and prevent flash on multi-cavity preforms. Professional preform machines adopt reinforced high-rigidity templates and high-response fast injection systems, achieving stable high-speed filling within 0.1 초, while standard machines have slow injection response and insufficient clamping rigidity, leading to uneven preform wall thickness and low yield. 추가적으로, dedicated PET machines are optimized for short material residence time, with streamlined flow channels and anti-stagnation nozzle structures to reduce melt retention and degradation. They also reserve professional interfaces for supporting equipment such as dehumidifying dryers and industrial chillers, forming a complete PET molding production system. Standard injection machines lack these targeted optimizations, resulting in low production efficiency, high defective rates, and inability to meet food-grade preform production standards. 요약하자면, ordinary injection machines can only complete simple plastic molding, while professional PET preform machines focus on high transparency, low acetaldehyde, high yield, and high-speed mass production, fully matching the strict process requirements of PET preform manufacturing.

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