称重式混合机（增重批次式）工作原理

Gain‑in‑Weight Gravimetric Blender

中文

称重式混合机采用增重批次式（GIW）重量计量方式。

1. 在触摸屏调用生产配方，设定新料、回料、色母、各助剂的配比重量。
2. 各个原料料斗的料门依次打开，物料落入下方称重仓，称重传感器实时采集重量。
3. 当某一种原料达到配方设定重量，料门立刻关闭，切换下一种原料投料。
4. 所有组份全部称量完成后，称重仓底部阀门打开，全部物料落入搅拌腔。
5. 搅拌电机充分搅拌混合，完成一批次混料后出料，供给注塑机/挤出机；随后进入下一轮称量循环。

核心特点：先全部称完，再一起搅拌出料。每种原料独立称重，不受物料密度、颗粒大小变化影响，配比精度高。

拓展：失重式称重混合机（Loss‑in‑Weight） 多用于挤出连续生产，料斗整体称重，根据料斗重量下降速率计算出料流量，和挤出机速度联动，实现不间断连续配料，不用分批次。

English

The gravimetric blender works on Gain‑in‑Weight (GIW) batch principle.

1. Call production recipe on HMI, set target weight for virgin material, regrind, masterbatch and additives.
2. Each hopper opens sequentially, material falls into weighing chamber. Load‑cell detects real‑time weight.
3. Once target weight is reached for one component, its gate closes, then next component starts feeding.
4. After all components are weighed, the bottom valve of weighing chamber opens, all materials drop into mixing chamber.
5. Mixing motor blends materials thoroughly, finished batch discharges to injection / extrusion machine, then next weighing cycle starts.

Key feature: Weigh all components first, then blend together. Independent weighing for each material, high batching accuracy, not affected by material density or particle size change.

Extension: Loss‑in‑Weight gravimetric blender For continuous extrusion process. Whole hopper is weighed, feeding flow‑rate is calculated by weight loss speed. Synchronized with extruder speed for non‑stop continuous batching, no batch cycle.