Design Guidelines Living Hinge. A hinge designed for 3d printing. The thickness of the polypropylene web used to create the living hinge should be between 0.007 and 0.015 of an inch.
There are a few different designs that living hinges tend to come in. Once again, if you want a good living hinge, the molecules should be oriented perpendicularly across the hinge, not parallel to it. If the thickness is too small, the hinge feels too soft.
Living Hinges Made From Fdm Materials Can Be Used For A Small Number Of Cycles.
In other words, a living hinge is an extension of the common material between the two plastic parts. Once again, if you want a good living hinge, the molecules should be oriented perpendicularly across the hinge, not parallel to it. The design of a living hinge takes into consideration the ability of the material to withstand strain and the material’s tensile strength.
A Plastic Living Hinge Is A Part Design Feature That Uses A Thin Plastic Material To Join Two Larger Plastic Bodies Of The Same Material.
The outer surface is placed under tension (and stretches), while the inner surface is compressed. The maximum thickness at a sharp corner is about 1.4 times the nominal wall thickness. Besides meeting the design guidelines, the hinges have to be processed properly.
These Types Of Hinges Are Common Features In Product Design For Several Reasons.
The thickness of the polypropylene web used to create the living hinge should be between 0.007 and 0.015 of an inch. They include, but aren't limited to, the following: A living hinge is not good for an application that places this kind of load on them.
The Thickness Of The Living Hinge Should Be Around 0.6 Mm.
Beyond the materials chosen for the hinges, you'll also need to know some design guidelines to be sure that your finished hinge functions in the way it is supposed to. When producing 3d printed living hinges, the material must be thicker than that injection molded hinge (possibly around 0.6mm). A door has significant weight and places a load on the hinges it is attached to.
The Full Method For Optimal Gate Placement Can Be Found In The Mit Guide To Designing Living Hinges.
The thickness of the hinge must provide a restriction to melt flow that orients the molecules across the hinge. The first difficulty is that the increase in thickness at the corner breaks the rule of uniform wall thickness. The optimal design for a living hinge produced via fdm is to try and print the hinge with a single strand of thermoplastic integrated into the rigid sections of the build (as shown in the image below).