It is extremely often today you will find Rare Earth Magnets utilised in creating retail packaging. That is usually paper box construction which includes more than one movable flaps. Often noticed in top end kids book collections, DVD collections, or things like Craft type kits found packaged in paperboard. It is considered a better for the hook and loop type fasteners (i.e. Velcro) located in older style boxes.
There’s 2 configurations which should be considered.
1) Using two rare earth magnets
2) One rare earth magnet, then one part of ferrous metal
Selecting which choice to choose depends upon a several factors:
Gap – after that are the total distance involving the magnet/metal pair
Feel – the amount force are you interested in the conclusion user to make use of when opening
Because of the somewhat fragile nature of rare earth magnets, it’s usually recommended that in assembly in the box, how the two parts (two magnets, magnet/metal) stop able to appear in direct contact with each other. This tends to minimize any chance the magnet could break as a result of shock in the event the box is closed.
Two Magnets – This configuration is advisable utilized each time a stronger bond is required, then when the information is thick, making a larger gap between them. Magnets might be inserted into paper board which is die-cut, or including be surface mounted and laminated over (or maybe a decorative design, sticker or pad of some sort or other may be placed above the magnet). Careful attention have to be made during assembly to guarantee the polarity is at an attracting configuration. Some manufactures offer rare earth magnets that are marked for the North seeking pole to help in assembly. If magnets are improperly mounted in a opposing configuration, they’re going to repel as well as the box is not going to close. Magnets prefer to attract to each other in an exceedingly exact manner, therefore, the two magnets will likely need to mate together in close proximity for that ideal bond to take place.
Magnet & Steel – This configuration is best utilized whenever a slightly weaker bond is desired, the content getting used isn’t as heavy, or when total price is the limiting factor. Using steel because mating piece to the magnet cuts the overall cost substantially as steel is a pretty bit less expensive the rare earth magnets. Steel discs, washers and also other similar steel bring the mating part to your rare earth magnet. Another factor that produces the magnet-steel combination attractive will be the keeping of magnet. Alignment with the steel piece just isn’t critical as being the magnet will attract well to the steel whether it is over-sized or otherwise not centered. Lastly there isn’t any concerns with polarity aided by the magnet-metal configuration, as the magnet attracts on the steel equally on either north of manchester or South seeking poles. Steel pieces are mounted inside similar ways because magnets and box could be die-cut as well as the metal inserted, maybe it’s taped in, glued in, and yes it may be laminated over with the totally invisible bond.
For magnet-magnet and magnet-steel configurations there are two factors which use a stronger solution in the bond.
1) The diameter from the magnet. Larger diameter (larger surface areas) from the magnets will yield Triangel Magnet ) The thickness in the magnet. Thinner magnets do not possess the maximum amount of holding strength as thicker magnets.
Just experiment. Try various configurations on your box construction. It may are more effective with one larger pair, or two smaller pairs. When the bond is simply too strong, lower the magnets diameter, quantity of magnet pairs, or even the thickness on the magnets or steel.
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