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塑膠射出常見不良原因分析與改善Analysis and improvement of common bad causes of plastic injection-康德富塑膠
2022-09-08塑膠射出常見不良原因分析與改善
- 1.缺料(充填不完全) Lack of material (incomplete filling)
- 2.毛邊 Burrs
- 3.流痕 Flow marks
- 4.結合線 Bonding line
- 5.縮水(凹陷) Shrink (depression)
1.缺料(充填不完全)Lack of material (incomplete filling)
原因分析Cause Analysis | 改善improve |
1.料溫太低Material temperature is too low | 1.提高料溫Increase material temperature |
2.模溫太低Mold temperature is too low | 2.提高模具溫度Increase mold temperature |
3.儲料位置不足Insufficient storage space | 3.增加儲料位置Add storage location |
4.射出速度過慢Injection speed is too slow | 4-1.加大射出壓力Increase injection pressure |
| 4-2.增快射出速度Increase injection speed |
5.包風Inclusive | 5.增加模具透氣Increase mold ventilation |
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2.毛邊Burrs
原因分析Cause Analysis | 改善improve |
1.塑料流動性太高(MI高)Plastic fluidity is too high (MI is high) | 1.射出速度降低The injection speed is reduced |
2.料溫太高Material temperature is too high | 2.調降溫度(注意塑料最低加工溫度)Lower the temperature (note the minimum plastic processing temperature) |
3.射出壓力太大Injection pressure is too high | 3.射出壓力降低injection pressure drop |
4.保壓壓力太大,時間太長Holding pressure is too high, time is too long | 4.降低保壓壓力與時間Decrease holding pressure and time |
5.儲料位置太長The storage position is too long | 5.縮短儲料位置Shorten the storage location |
6.模具損傷Mold damage | 6.修復模具Repair mold |
3.流痕Flow marks
原因分析Cause Analysis | 改善improve |
1.塑料未完全乾燥Plastic is not completely dry | 1-1.加強原料乾燥Enhance drying of raw materials |
| 1-2.背壓加大Increased back pressure |
| 1-3.加強螺桿排氣Enhanced screw exhaust |
2.原料溫度太高,造成原料劣化The temperature of the raw material is too high, causing the deterioration of the raw material | 2-1.降低料溫Reduce material temperature |
| 2-2.降低射速reduce rate of fire |
4.結合線Bonding line
原因分析Cause Analysis | 改善improve |
塑料在模腔內,經過模仁時,造成分流!最後當兩股塑料結合時,所產生之線條When the plastic is in the mold cavity, when it passes through the mold core, it causes shunting! Finally, when the two strands of plastic are combined, the lines generated | 1.提高料溫 Increase the material temperature 2.提高模溫 Increase the mold temperature 3.增加壓力 Increase the pressure 4.調整射出位置 Adjust the injection position |
5.縮水(凹陷)Shrink (depression)
原因分析Cause Analysis | 改善improve |
1.成型周期太快,冷卻不足The molding cycle is too fast, and the cooling is insufficient | 1.增加冷卻時間Increase cooldown |
2.保壓時間不足 The pressure holding time is insufficient | 2.增加保壓時間Increase dwell time |
3.產品肉厚不平均The thickness of the product is uneven | 3.模具修改,使肉厚平均Die modification to make meat thickness average |
4.入口點太小,射出阻力太大The entry point is too small, and the injection resistance is too large | 4.增加入口點體積Increase entry point volume |