Multi-layer hollow blow molding machine failure and troubleshooting

In addition to the anomalous phenomenon of extrusion blow molding, multi-layer hollow blow molding machines may also have two abnormal phenomena peculiar to multi-layer hollow blow molding.

One. Product delamination

1. The melt temperature of the adhesive layer is too low, the material fusion is not good, the temperature of the adhesive layer is appropriately increased, and the adhesive property is improved.

2. The melt temperature of the adhesive layer is too high, and it is attached to the adjacent layer to make the adhesive layer uneven, and the temperature of the adhesive layer is appropriately lowered.

3. The temperature of the blow mold is too low, the adhesive layer in the product cools too fast and the adhesion to the adjacent layer is not strong, and the flow rate of the cooling medium is controlled to avoid the mold temperature being too low.

4. The raw material contains moisture and the raw material should be dried.

Two. Uneven barrier layer in the product

1. The barrier layer melt temperature is too low or too high, and the corresponding extruder temperature and extrusion rate are readjusted.

2. The extruder pressure fluctuates, the extrusion speed is unstable or the screw structure is improper.

3. The head of the machine is stuck or degraded, and the flow of the machine head is improved for the fluidity of the material to avoid detention.

The failure of the multi-layer hollow blow molding machine is mainly related to the extruder and the parison head. Therefore, the screw structure and control precision of the extruder are required to be high. In addition, the flow path design of the parison head is also important.

The multi-layer hollow blow molding machine provided by Zhangjiagang Yijiu Machinery Co., Ltd. is mainly used for blowing and permeable three-layer composite bottles, which are used for packaging pesticides, chemicals and other products with high resistance to penetration.

Multi-layer hollow blow molding machine is fully automatic computer control, equipped with precise integrated PID temperature control system, real-time detection of each screw extrusion pressure, can realize centralized control, interlock protection and alarm function, with automatic deflashing function, and Optional 100 point wall thickness control system.

The multi-layer hollow blow molding machine greatly reduces the thickness of the composite bottle by precise control without affecting the impermeability of the product, thereby greatly reducing the cost of the composite bottle, and is currently close to the level of the glass bottle. The composite bottle itself has the advantages of light weight and not easy to be broken, so it can be an ideal substitute for glass bottles and has broad market prospects.