高速注塑瓶胚PET干燥系统

# 高速注塑瓶胚PET干燥系统（中英双语） **核心结论速览**：高速注塑瓶胚PET干燥系统是集成**预结晶+深度除湿干燥+密闭恒温输送+智能联动控制**的一体化聚酯干燥解决方案，目标是将PET切片含水率稳定控制在**50ppm以下**，露点需达**-40℃~-50℃**，以匹配高速注塑（72-96腔）节拍，保障瓶胚质量与生产效率。 

--- ### 一、系统定义与核心目标 瓶胚高速注塑干燥系统是专为PET瓶胚高速注塑工艺定制的一体化聚酯干燥系统，集成PET切片预结晶、深度除湿干燥、密闭恒温输送、热风再生循环、智能工艺联动五大核心功能。 The drying system for high-speed preform injection moulding is an integrated polyester drying system specially designed for high-speed PET preform injection molding process, integrating five core functions: PET chip pre-crystallization, deep dehumidification drying, closed constant temperature conveying, hot air regeneration cycle, and intelligent process linkage.

 **核心目标**： 1. 将PET切片含水率稳定控制在**≤50ppm(0.005%)**，避免注塑过程中水解导致的瓶胚发黄、脆裂、气泡等缺陷 2. 实现与高速注塑机（72-96腔模具）的精准联动，保障连续稳定供料，匹配高速注塑节拍 3. 全程密闭防吸潮，防止干燥后PET切片二次吸湿 Core objectives: 1. Stably control the moisture content of PET chips at **≤50ppm(0.005%)** to avoid defects such as yellowing, brittleness, and bubbles caused by hydrolysis during injection molding 2. Achieve precise linkage with high-speed injection molding machines (72-96 cavity molds) to ensure continuous and stable feeding and match the high-speed injection molding cycle 3. Closed moisture-proof throughout the process to prevent reabsorption of moisture by dried PET chips 

--- ### 二、系统组成与核心部件（中英双语） | 系统模块 | 核心部件 | 功能说明 | 英文对应 | |---------|---------|---------|---------| | **预结晶单元** | 搅拌式结晶器/流化床结晶器 | 120-160℃热风使PET切片结晶，防止干燥时结块，提高结晶度 | Pre-crystallization unit: Agitated crystallizer/fluidized bed crystallizer | | **除湿干燥主机** | 分子筛转轮/双塔吸附器、高温加热器(160-180℃)、精密过滤器 | 提供低露点(-40℃~-50℃)干燥风，深度脱除PET内部水分 | Dehumidification drying host: Molecular sieve rotor/twin-tower adsorber, high-temperature heater (160-180℃), precision filter | | **干燥料斗** | 双层保温不锈钢料斗(1000-3000L)、温度传感器、料位计 | 确保PET切片停留4-6小时，实现充分干燥 | Drying hopper: Double-layer insulated stainless steel hopper (1000-3000L), temperature sensor, level gauge | | **密闭输送系统** | 保温真空上料机、密闭管道、单向阀 | 干燥后PET切片无接触输送至注塑机料斗，防二次吸潮 | Closed conveying system: Insulated vacuum loader, closed pipeline, check valve | | **智能控制系统** | PLC+触摸屏、露点监测仪、温度/湿度/压力传感器 | 实时监控参数，与注塑机联动，自动调节供料速度 | Intelligent control system: PLC + touch screen, dew point monitor, temperature/humidity/pressure sensor | | **热风再生循环** | 再生风机、冷却器、冷凝水排放装置 | 脱附吸附剂水分，实现干燥风闭环循环，节能30%+ | Hot air regeneration cycle: Regeneration fan, cooler, condensate discharge device | -

-- ### 三、核心工作原理（中英双语） 系统遵循“**分级预结晶定型 + 高温低露点穿流干燥 + 闭环热风再生 + 全程密闭输送**”的连续工艺流，基于PET热结晶动力学与传质脱水原理。 The system follows a continuous process flow of "**graded pre-crystallization setting + high-temperature low-dew-point cross-flow drying + closed-loop hot air regeneration + full closed conveying**", based on the principles of PET thermal crystallization kinetics and mass transfer dehydration. 

**详细工作流程**： 1. **原料进料**：PET切片经真空上料机进入预结晶器 Raw material feeding: PET chips enter the pre-crystallizer through a vacuum loader 2. **预结晶阶段**：120-160℃热风穿流PET切片，促进分子有序排列，结晶度从4%提升至30-40%，防止干燥时结块 Pre-crystallization stage: 120-160℃ hot air flows through PET chips, promoting molecular ordered arrangement, increasing crystallinity from 4% to 30-40%, preventing caking during drying 3. **深度干燥阶段**： Deep drying stage: - 分子筛转轮/双塔吸附器将环境空气除湿至**-40℃~-50℃露点** - Molecular sieve rotor/twin-tower adsorber dehumidifies ambient air to **-40℃~-50℃ dew point** - 高温加热器将干燥风加热至**160-180℃

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