What Is The Difference Between Positive And Negative Pressure Thermoforming Machine And Vacuum Forming Machine?

1.Positive and negative pressure thermoforming machine, do you think it is the collective name of positive pressure blister machine and negative pressure blister machine when you hear this name? Actually no, the positive and negative pressure blister machine is the name of a device, not the combined name of two devices. In addition to the positive and negative pressure thermoforming machine, there is also a negative pressure vacuum blister machine. There is a big difference in nature, so what is the difference?

  1. The effect of the finished workpiece is different: The positive and negative pressure blister machine will make the three-dimensional sense of the water chestnut, concave-convex surface, groove surface and corner of the workpiece to be stronger. Negative pressure blister machine, because it is only the function of negative pressure, no pressure is added on it, and it can only be pulled down by airflow, so the three-dimensional sense of the corners, grooves and other positions of the workpiece after processing is not strong.

The degree of release varies:

The positive and negative pressure blister machine is transmitted to every part of the workpiece through the positive pressure heating air flow. The air flow will bring the temperature when it is pressurized, and the transmission is in place, so that the workpiece is not easy to release the film.

Negative pressure suction machine, because the temperature can only be transmitted on the surface of the workpiece, the temperature of the sides and grooves is not comprehensive enough compared with positive and negative pressure, so the relative adhesion will be relatively poor, the product will be in 2-3 years Easy to fall off.

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