Common problems and troubleshooting methods for PP flat yarn drawing machines
Common problems and troubleshooting methods for PP flat yarn drawing machines

一、挤出系统故障 Extrusion System Faults
|
故障现象 Fault Phenomenon |
原因 Causes |
排除方法 Solutions |
|
不出料、出料量不足 |
料斗堵塞、进料段温度过高、滤网堵塞、螺杆卡异物、原料受潮结块 |
清理料斗及螺杆异物、降低进料段温度、按时换网、原料烘干除结块 |
|
挤出电流波动不稳 |
原料含水含杂、温控不均、螺杆磨损、变频器转速不稳 |
原料烘干除杂、检修温控、更换磨损螺杆、校准变频器 |
|
模头出料不均、膜厚偏差大 |
模头温度不均、模唇间隙不均、滤网局部堵塞、冷却水不稳 |
检修模头加热、微调模唇间隙、更换滤网、稳定水温和牵引速度 |
|
平膜气泡、气孔、鱼眼 |
原料水分超标、温度过高降解、杂质多、模头碳化积料 |
彻底烘干原料、适当降温、清理模头碳化料、低速排气 |
|
模唇挂料、产生塑珠 |
烘干异常、模温偏高、熔体流动性差 |
调整烘干工艺、降低模温、清理模口积料抛光模唇 |
二、平膜成型故障 Flat Film Forming Faults
|
故障现象 Fault Phenomenon |
原因 Causes |
排除方法 Solutions |
|
膜面直条纹、划痕 |
模唇卡杂质、模唇磨损、冷却辊脏污 |
清理模唇、修复磨损部位、清洁冷却辊 |
|
薄膜起皱、两边紧中间松 |
模头两端温度低、冷却水不均、牵引张力失衡 |
升高模头两侧温度、平衡水路、校正牵引辊平行度 |
三、牵伸剖丝核心故障 Drawing & Slitting Faults
|
故障现象 Fault Phenomenon |
原因 Causes |
排除方法 Solutions |
|
扁丝频繁断丝 |
牵伸比过大、烘箱温度异常、原料韧性差、辊筒打滑 |
降低牵伸比、校准烘箱温度、更换原料、清洁辊筒增摩擦 |
|
竹节丝、粗细不均 |
水温高、速度波动、原料未烘干、温度不稳 |
降温增水流量、稳定转速、彻底烘干原料、恒温生产 |
|
剖丝跳刀、切口不齐 |
刀片钝、角度不准、模温高、膜张力不稳 |
更换新刀片、校正角度、降低模温、稳定膜张力 |
四、收卷、机械与电气故障 Winding, Mechanical & Electrical Faults
|
故障现象 Fault Phenomenon |
原因 Causes |
排除方法 Solutions |
|
收卷松紧不一、堆垛 |
张力控制器失灵、收卷辊磨损、传感器故障 |
校准张力、更换辊筒、检修传感器、匹配速度 |
|
设备震动大、异响 |
轴承缺油损坏、螺丝松动、齿轮不良、机座不稳 |
补高温润滑脂、紧固螺丝、检修齿轮、加固机座 |
|
无法启动、温控失灵 |
缺相、探头损坏、急停未复位、线路松动 |
检修电源、更换探头、复位急停、紧固线路 |
五、日常维保标准 Daily Maintenance Standards
1. 原料管控 Raw Material Control
新料、再生料必须烘干除杂,严禁含水原料上机。
Virgin and recycled materials must be dried and purified. Wet materials are prohibited.
2. 滤网更换周期 Screen Replacement Cycle
全新原料 72 小时换网,再生料 40 小时以内强制换网。
Screen change every 72 hours for virgin material, within 40 hours for recycled material.
3. 温度管控 Temperature Control
严控挤出、模头、烘箱温度,杜绝物料碳化。
Strictly control extrusion, die and oven temperature to prevent carbonization.
4. 润滑保养 Lubrication
轴承、减速机定期补油,高温部位使用耐高温润滑脂。
Regular lubrication for bearings and reducers; use high-temperature resistant grease.
5. 每日清洁 Daily Cleaning
停机清理模唇、冷却辊、牵引辊积料,防止划伤薄膜扁丝。
Clean die lip and rollers after shutdown to avoid scratches.
六、紧急停机条件 Emergency Shutdown Rules
1. 大面积连续断丝无法恢复 Continuous large-area wire breakage
2. 模头严重挂料、碳化冒烟 Severe die hanging material and smoking
3. 设备剧烈震动、异响、皮带打滑冒烟 Severe vibration, abnormal noise and belt slipping
4. 电气报警、温控失效、电机过热 Electric alarm, temperature failure and motor overheating
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