What is the difference between a positive and negative pressure press machine and a negative pressure ?
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What is the difference between a positive and negative pressure press machine and a negative pressure ?

Views:8     Author:Site Editor     Publish Time: 2021-08-31      Origin:Site

TM2580F图



1. Different concepts:

 

    The positive and negative pressure blister machine, generally speaking, not only has a negative pressure (vacuum pressure) underneath, but also a positive pressure on the top. When the machine is operating, the bottom is pumped and the top pressure is drawn, not only is the bottom negative pressure vacuumed, but also the top pressure is added, so it becomes positive and negative pressure.

 

    Negative pressure blister machine, but the bottom is vacuumed, there is no pressure on the top, so it is called negative pressure machine.



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2. The effect of the finished product is different:

 

    The positive and negative pressure blister machine will have a strong three-dimensional effect on the workpieces such as rhombohedral corners, concave and convex surfaces, groove surfaces, and corners.

 

    The negative pressure blister machine, because it is only a negative pressure function, does not add any pressure on it, and can only be pulled down by air flow, so the three-dimensional sense of the corners, grooves and other positions of the workpiece after processing is not strong.



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3. The degree of film release is different:

 

    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 brings the temperature when it is pressurized, and the transmission is relatively in place, so that the workpiece is not easy to peel off.

 

    Negative pressure blister machine, because the temperature can only be transferred to the surface of the workpiece, the temperature transfer of the side and groove is not comprehensive compared with the positive and negative pressure, so the relative adhesion will be relatively poor. The product will be in 2-3 years It is easy to fall off the edge afterwards.


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