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Plastic living hinges are typically manufactured in an injection molding operation [2] [3] that creates all three parts at one time as a single piece, and if correctly designed and constructed, it can remain functional over the life of the part. Thermoforming can also produce hinged products.
Diagram of a structure featuring plastic hinges. In the structural engineering beam theory, plastic hinge is the deformation of a section of a beam where plastic bending occurs. [1] In earthquake engineering plastic hinge is also a type of energy damping device allowing plastic rotation [deformation] of an otherwise rigid column connection. [2]
Polypropylene lid of a Tic Tac box, with a living hinge and the resin identification code under its flap. As polypropylene is resistant to fatigue, most plastic living hinges, such as those on flip-top bottles, are made from this material. However, it is important to ensure that chain molecules are oriented across the hinge to maximise strength.
Threads, lugs, hinges, locks, adhesives, etc. are used. Many plastic closures are made by injection molding. [6] Many closures need to have the ability to adjust to slight manufacturing variation in the container and the closure structure. Some closures are made of flexible material such as cork, rubber, or plastic foam.
WASHINGTON (Reuters) -President-elect Donald Trump said on Saturday that former Republican presidential contender Nikki Haley and former Secretary of State Mike Pompeo will not be asked to join ...
Most people do not have to reenroll in Medicare unless their coverage lapses. Learn more here.
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