It’s very often today you’ll find Rare Earth Magnets utilized in producing retail packaging. This can be usually paper box construction that has one or more movable flaps. Often affecting top quality kids book collections, DVD collections, or such things as Craft type kits found packaged in paperboard. It can be considered an alternative towards the hook and loop type fasteners (i.e. Velcro) present in Concrete Magnets .
There’s two configurations which should be considered.
1) Using two rare earth magnets
2) Using one rare earth magnet, then one part of ferrous metal
Selecting which replacement for choose is dependent upon a several factors:
Gap – and what will be the total distance relating to the magnet/metal pair
Feel – just how much force do you need the finish user to utilize when opening
Due to the somewhat fragile nature of rare earth magnets, it is usually recommended that during assembly with the box, which the a double edged sword (two magnets, magnet/metal) not be permitted to are available in direct exposure to the other person. This will minimize any chance the magnet could break resulting from shock once the box is closed.
Two Magnets – This configuration is best utilized each time a stronger bond becomes necessary, then when the content is thick, creating a larger gap between the two. Magnets is usually inserted into paper board which was die-cut, or they may also be surface mounted and laminated over (or a decorative design, sticker or pad of some type may be placed in the magnet). Alert must be made during assembly to make sure polarity is in an attracting configuration. Some manufactures offer rare earth magnets which might be marked about the North seeking pole to assist in assembly. If magnets are improperly mounted in a opposing configuration, they will repel as well as the box is not going to close. Magnets like to attract to each other in an exceedingly exact manner, therefore, the two magnets must mate together close for the ideal bond that occurs.
Magnet & Steel – This configuration is best utilized when a slightly weaker bond is desired, the material being employed just isn’t heavy, or when price tag would be the limiting factor. Using steel as the mating piece for the magnet cuts the total cost substantially as steel is a pretty bit less than the rare earth magnets. Steel discs, washers and also other similar steel bring the mating part to the rare earth magnet. Another factor which makes the magnet-steel combination attractive will be the keeping magnet. Alignment in the steel piece isn’t as critical since the magnet will attract well for the steel if it’s over-sized or not centered. Lastly there won’t be any concerns with polarity aided by the magnet-metal configuration, since the magnet attracts to your steel equally on either north of manchester or South seeking poles. Steel pieces are mounted within the similar ways since the magnets and box could possibly be die-cut and the metal inserted, it can be taped in, glued in, plus it could possibly be laminated over for the totally invisible bond.
Both for magnet-magnet and magnet-steel configurations there are 2 factors which use a stronger solution from the bond.
1) The diameter in the magnet. Larger diameter (larger surface areas) with the magnets will yield stronger the bonds.
2) The thickness in the magnet. Thinner magnets will not have just as much holding strength as thicker magnets.
Just experiment. Try various configurations for your box construction. It may well are better with one larger pair, or two smaller pairs. If your bond is way too strong, decrease the magnets diameter, number of magnet pairs, or the thickness from the magnets or steel.
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