1. blow molding pressure is not enough, raw material is not completely compacted.
2. the barrel temperature is too low, the raw material is not completely melted.
3. blowing cycle time is too short.
4. mold temperature is too low.
5. mold exhaust is insufficient, cannot stick the inner surface of the mould products.
6., mold surface dirt, rough.
7., raw materials are too poor, poor liquidity in the production process.
2. the barrel temperature is too low, the raw material is not completely melted.
3. blowing cycle time is too short.
4. mold temperature is too low.
5. mold exhaust is insufficient, cannot stick the inner surface of the mould products.
6., mold surface dirt, rough.
7., raw materials are too poor, poor liquidity in the production process.
