Blown Film Die Head and its Features

1. Center feeding die

Mouth mold: φ30mm-φ2650mm

2.Side feeding die

Mouth mold: φ30mm-φ800mm

3. Planar stacking die

Mouth mold: φ150mm-φ800mm

Advantages of various types of mold heads:

1. Advantages and disadvantages of center feeding/side feeding:

Advantages: independent structure of the mold body, good uniformity and sealing.

Disadvantages: The process temperature of each layer of melt cannot be controlled independently, so when selecting the die head, it is necessary to consider that the process temperature of each layer of raw materials needs to be close.

2. Advantages of plane superposition/plane taper superposition:

The number of layers can be combined arbitrarily; the temperature of each layer can be controlled independently to meet the process temperature difference, effectively preventing material degradation and making it easy to process, clean and maintain.

No matter what kind of die structure it is, the core key lies in the runner design. For the design of the spiral flow channel, Chaoxin's engineers used their rich experience and software analysis to calculate the pressure distribution, residence time and shear rate of the melt in the die, taking the parameters and output of the material as the initial conditions. And the most critical velocity distribution at the exit of the spiral flow channel.