Magnetic Box Closures

It is very often today you may find Rare Earth Magnets used in the production of retail packaging. This really is generally paper box construction containing one or more movable flaps. Often affecting top quality kids book collections, DVD collections, or things like Craft type kits found packaged in paperboard. It can be considered a replacement towards the hook and loop type fasteners (i.e. Velcro) located in older style boxes.

There’s two configurations which should be considered.

1) Using two rare earth magnets

2) Using one rare earth magnet, and something section of ferrous metal

Selecting which substitute for choose is dependent upon a several factors:

Gap – what will function as total distance relating to the magnet/metal pair
Feel – just how much force do you need the end user to utilize when opening

A result of the somewhat fragile nature of rare earth magnets, it’s usually recommended that in assembly from the box, which the two parts (two magnets, magnet/metal) not capable to are available direct exposure to one another. This tends to minimize any chance the magnet could break on account of shock when the box is closed.

Two Magnets – This configuration is the most suitable utilized each time a stronger bond is required, so when the pad is Triangel Chamfer , building a larger gap bewteen barefoot and shoes. Magnets might be inserted into paper board which was die-cut, or they may also be surface mounted and laminated over (or maybe a decorative design, sticker or pad of some sort could possibly be placed in the magnet). Careful attention have to be made during assembly to be sure the polarity is an attracting configuration. Some manufactures offer rare earth magnets which are marked for the North seeking pole to help in assembly. If magnets are improperly mounted in an opposing configuration, they’ll repel plus the box is not going to close. Magnets love to attract to each other in a very exact manner, therefore, the two magnets should mate together close for the ideal bond to take place.

Magnet & Steel – This configuration is the most suitable utilized when a slightly weaker bond is desired, the fabric getting used isn’t as heavy, or when total cost will be the limiting factor. Using steel since the mating piece towards the magnet cuts the all inclusive costs substantially as steel is a reasonably bit less expensive the rare earth magnets. Steel discs, washers as well as other similar steel can be used as the mating part to your rare earth magnet. Take into consideration making the magnet-steel combination attractive could be the placement of magnet. Alignment in the steel piece is not as critical since the magnet will attract well towards the steel if it is over-sized or otherwise centered. Lastly there are no concerns with polarity with the magnet-metal configuration, since the magnet attracts to your steel equally on either its northern border or South seeking poles. Steel pieces are mounted from the similar ways as the magnets and box might be die-cut and the metal inserted, it may be taped in, glued in, and it also may very well be laminated over for that totally invisible bond.

Either way magnet-magnet and magnet-steel configurations there are 2 factors which increase the strength in the bond.

1) The diameter on the magnet. Larger diameter (larger surface areas) of the magnets will yield stronger the bonds.
2) The thickness on the magnet. Thinner magnets will not have just as much holding strength as thicker magnets.

Just experiment. Try various configurations to your box construction. It could are more effective with one larger pair, or two smaller pairs. If the bond is just too big strong, lower the magnets diameter, amount of magnet pairs, or maybe the thickness with the magnets or steel.

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