Can an Electro-Permanent Magnet Work as a Temporary Lifting Device?

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SUMMARY

The discussion focuses on the feasibility of using electro-permanent magnets as temporary lifting devices. The proposed design involved two 7x7x1.5mm magnets placed between iron plates with opposing poles, intended to create a closed magnetic field. However, the experiment revealed that the force generated with two magnets was only marginally less than with one, indicating a flaw in the design or understanding of magnetic field dynamics. Participants are encouraged to explore alternative configurations or magnet types to achieve the desired temporary lifting capability.

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ctech4285
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So I am trying to come up with a magnet parts lifting device that can be temporarily turned off

Their theory was, take two magnets (7x7x1.5mm in this case) place them between two iron plates with opposing poles and there should not be any field lines leaving the iron.
Take away one of the magnets and the work load closes the field line path, exerting a force

Well it did not work, with two opposing magnets present the force is only slightly less than with one.

Any ideas where I went wrong?
 

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this is exactly what i had in mind
 

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