hinges for plastic frame: 

how many types of hinges for plastic frames:

According to different structures and installation methods, all hinges for plastic frame can be divided into hidden hinges, universal hinges, spring hinges for plastic frame, front hinges for replacement and hinged wire cores.

Hidden hinges:

There are two feet in both front hinge and temple hinge for this kind of hinges, after they are attached into front and temple, they will become invisible, such as TH-53,TH-56. They are attached onto frames mainly by hinge inserting machine. 

Universal hinges:

They are the most fantastic hinges you could ever find in eyeglass world,since they usually work with rivets, sometimes we call them rivet hinges as well. Because of its excellent shape and special mounting way, this kind of hinges could be used in any material of frames, no matter yours are metal frame, plastic frame, horn frame, aluminum frames or even titanium frames etc, they don't need spot welding or being inserted by special machine, they only need to be mounted on by small punching machine. Of course, if you are only one glasses maker amateur, you could directly use screws only to attach them onto your glasses.  

Spring hinges for plastic frame: 

Here the spring hinges for plastic frame, which we refer to short hinges which are without metal wire at end. Actually, most of hinges used for wood frames could be used for plastic frames as well. 

Hinged wire cores:

In many times, when customers say hinges for plastic frames, they are actually refering to the hinges with wire cores actually. As you could see in most of acetate frames, there's metal wire inside arm, which makes the arms more stronger and not afraid of breaking problem, also enable it could be bent easier. 

Front hinges for plastic frames: 

For the part which attaches to the frame front, we call it front hinges,they work with spring hinges, normal hinges in the temple, and sometimes, need to be replaced.