TPU流延机淋膜纸称重拌料系统组成部分 Components of TPU Cast‑Film & Laminating Paper Gravimetric Batching System

TPU流延机淋膜纸称重拌料系统组成部分 Components of TPU Cast‑Film & Laminating Paper Gravimetric Batching System 本系统为连续失重式LIW配料系统，适配TPU淋膜流延挤出工艺，区别于注塑批次混料机。 1.原料储料单元 Material Storage Unit 多组独立不锈钢储料仓，分别存放TPU新料、边角回料、色母粒、功能助剂； 配备防架桥振打装置，防止TPU颗粒搭桥堵料； 料位传感器，缺料自动报警； 可配套分子筛除湿干燥机，对吸潮TPU原料做预处理。 Multiple independent stainless‑steel silos for TPU virgin material, edge‑trim regrind, color masterbatch and functional additives. Equipped with anti‑bridging vibrators to avoid material bridging. Material‑level sensors with low‑material alarm. Molecular‑sieve dehumidifying dryer can be matched for moisture‑sensitive TPU. 2.核心计量单元 Core Metering Unit（失重式喂料机 Loss‑in‑Weight Feeder） 每套组分独立一套失重喂料机，包含：称重料斗、高精度称重传感器、伺服驱动螺杆、补料阀； PID闭环控制，实时计算料斗失重速率，动态调节螺杆转速，实现连续流量计量； 支持微量色母、助剂高精度喂料； 料斗低位自动补料，补料时切换容积模式，不中断出料。 Independent loss‑in‑weight feeder for each component, including weighing hopper, high‑precision load cells, servo‑driven screw and refill valve. PID closed‑loop control calculates weight‑loss rate and adjusts screw speed for continuous flow metering. Supports high‑precision micro‑dosing for color masterbatch and additives. Auto‑refill at low hopper level; volumetric mode is activated during refilling without stopping output. 3.静态混合单元 Static Mixing Unit 多路物料出料后汇入静态混合器； 无机械搅拌、低剪切，保护热敏TPU； 使TPU主料与助剂充分均化，消除局部浓度偏差，避免淋膜纸出现晶点、条纹、色差。 All material streams converge into static mixer. Low‑shear design without mechanical stirring to protect heat‑sensitive TPU. Homogenizes all ingredients to prevent crystal spots, streaks and color difference on laminating paper. 4.密闭输送单元 Sealed Conveying Unit 真空负压上料系统、耐磨密闭输送管道、分流接头； 把混合物料密闭输送至流延挤出机进料斗； 隔绝外界湿气、粉尘，防止TPU吸潮水解。 Vacuum negative‑pressure loading system, wear‑resistant sealed pipelines and distribution connectors. Deliver blended material to extruder hopper in sealed condition, isolate ambient moisture and dust to avoid TPU hydrolysis. 5.PLC智能控制单元 PLC Intelligent Control Unit PLC控制器+HMI触摸屏； 储存多套TPU淋膜配方，一键调用； 与流延挤出主机联动，根据挤出机产量自动同步各路喂料流量； 记录各组分消耗数据，配比超限、堵料、缺料报警； 支持对接车间MES系统，配方权限管理。 PLC controller + HMI touch screen. Store multiple TPU laminating recipes for one‑click recall. Interlock with cast‑film extruder, auto‑adjust feeding flow following extruder output. Log consumption data, trigger alarms for ratio deviation, blockage and material shortage. Support MES connection and recipe permission management. 6.选配辅助单元 Optional Auxiliary Units - 分子筛除湿干燥机：TPU原料除湿，防止膜面气泡黄变 - 金属分离器：去除金属杂质，保护挤出模头 - 粉碎机：回收淋膜边角料，处理回料 - 模具/模头除露机 Mold Dehumidifier：解决模头凝露问题 - Molecular‑sieve dehumidifying dryer: dehumidify TPU to avoid bubbles and yellowing - Metal detector: remove metal impurities to protect die - Granulator: recycle edge‑trim regrind - Mold Dehumidifier: prevent die condensation