What is the reason why the external pressure frame of hundreds of millions of pattern machines can't fit?

1. Due to insufficient pressure, the seal is not tight. You can check whether the pressure is insufficient and adjust it if there is.

2. Because the electromagnetic force generated by the electromagnetic coil is in the opposite direction, the external pressure frame cannot be pressed down. You can try to tighten the inner iron core in the fixed electromagnetic coil and check whether the lower pressure plate corresponds to the iron core position.

3. The air pressure is not enough to press it down. You can check whether the air compressor works normally and whether the air pipeline leaks.

4. The external pressure frame can't be pressed down due to mechanical failure. You can check whether the mechanical part is stuck or deformed.