What is the structure of the hollow extrusion blow molding machine?

What is the structure of the hollow extrusion blow molding machine?

Blow molding machine is a rapidly developing plastic processing machine, which can quickly blow hollow products of various materials such as PE,pp,hdpe,ldpe etc. I will share with you the principle and structure of the hollow plastic blow molding machine today.

1. The principle of extrusion blow molding machine

The blow molding machine uses the wind from the machine to blow the plastic body into the cavity of a certain shape after the liquid plastic is sprayed out. The plastic parison is placed in the split mold while it is hot, and the mold is immediately in the parison after the mold is closed. Compressed air is blown in to inflate the plastic parison and close to the inner wall of the mold. After cooling and demolding, various hollow products can be obtained. It is often used to blow hollow products of PE and other materials, such as barrels, drums, beer preservation containers, tool boxes, fruint can,water bag etc.

2. The structure of the hollow blow molding machine

The structure of the hollow blow molding machine is mainly composed of the extruder, the head, the hydraulic system, the mold clamping system, the electrical control system, the inflation system, and the automatic clamping system. The basic structure is mainly composed of the power part and the heating part. . The power part is mainly composed of a frequency converter and a power output motor, which is the main working part for energy transmission and wind output. The heating part is composed of an electromagnetic heater and a bracket part, which can be used to heat the plastic that needs to be blown by wind to maintain its long-term softening characteristics.

3. Extrusion blow molding machine production process

The extruder heats, melts, and mixes the plastic particles into the die head.The die head forms the molten plastic into a prefabricated parison. The parison enters the mold and cooperates with the blowing system to cool and blow mold to obtain the final product For the pre-products, there may be trimming, welding and other processes behind.