TPU流延机淋膜纸称重拌料系统的工作原理

TPU流延机淋膜纸称重拌料系统的工作原理，称重式混料机厂家，称重式拌料机TPU流延机淋膜纸称重拌料系统工作原理 Working Principle of TPU Cast‑Film & Laminating Paper Gravimetric Batching System 核心：多组失重式喂料机（Loss‑in‑Weight Feeder）连续动态计量，适配TPU流延淋膜连续挤出工艺，区别于注塑批次增重混料机。 中文工作流程 1. 原料预处理与上料 TPU新料、回料、色母、功能助剂，经真空上料送入各自独立的失重喂料机称重料斗；TPU易吸潮，配套除湿干燥机，保证原料含水率达标。料斗配有防架桥振打装置，避免颗粒搭桥堵料。 2. 失重计量（核心阶段） 每台失重喂料机的称重料斗搭载高精度称重传感器，实时采集料斗重量；系统计算单位时间料斗重量下降速率，得出实际出料流量。 PLC对比实际流量 vs 配方设定流量，通过PID闭环，实时调节喂料螺杆转速，自动补偿原料密度、温度波动带来的流量偏差，维持各组分配比稳定。 多路喂料机同步运行：TPU主料、色母、回料、助剂按照预设重量流量同时出料。 3. 静态混合均化 各路物料从喂料机排出后汇入静态混合器，无机械搅拌，低剪切，保护热敏TPU材料，让各组分充分混匀，消除局部浓度差，防止淋膜纸出现晶点、条纹、色差。 4. 连续送入挤出主机 混合物料密闭输送直接进入流延挤出机进料口；系统可与挤出机联动，挤出机产量变化时，自动同步调整各路喂料流量，稳定产品米重。 5. 自动补料循环 当称重料斗物料下降到低位阈值，系统触发自动补料；补料瞬间切换容积模式，不中断出料；补料完成立刻恢复失重计量模式，实现24小时不间断连续生产。 6. 数据记录与报警 PLC触摸屏记录每组分实际消耗量、配比数据；配比超差、缺料、堵料时自动报警，可导出报表，实现生产质量追溯。   English Working Principle 1. Material Pre‑treatment & Loading TPU virgin pellets, regrind, color masterbatch and functional additives are conveyed by vacuum loader into individual loss‑in‑weight feeder hoppers. A dehumidifying dryer is equipped for moisture‑sensitive TPU. Anti‑bridging vibrators are installed to prevent material bridging. 2. Loss‑in‑Weight Metering (Core Stage) Each weighing hopper is fitted with high‑precision load cells. The controller calculates real‑time discharge flow by measuring the weight‑loss rate of hopper per unit time. PLC compares actual flow with preset formula flow, and adjusts screw speed via PID closed‑loop control to compensate for density and temperature fluctuation. Multiple feeders run synchronously to deliver each component at target mass flow. 3. Static Blending All material streams enter a static mixer. Low‑shear blending protects heat‑sensitive TPU, eliminates local concentration deviation to avoid crystal spots, streaks and color difference on laminating paper. 4. Feeding to Extruder Homogenized material is sealed‑conveyed into cast‑film extruder hopper. The system interlocks with extruder, automatically adjusts feeding flow following extruder output to keep stable mass‑per‑meter. 5. Auto‑refill Cycle When hopper reaches low‑level threshold, automatic refilling is triggered. During refilling, volumetric control is applied without stopping material output. After refilling, switch back to loss‑in‑weight mode for 24‑hour continuous production. 6. Data Logging & Alarm HMI records consumption data of each ingredient. Alarms trigger for ratio deviation, material shortage or blockage. Production reports can be exported for quality traceability.   关键要点 Key Notes - 流延淋膜是连续挤出工艺，必须使用失重式LIW；批次增重混料机（Gravimetric Blender）只适合注塑间歇生产，不适用该场景。 - TPU热敏、吸潮，整套系统需要密闭，配合分子筛除湿干燥机，避免水解黄变、膜面气泡。