How to test the performance of the installation hinge
One side of the two parts connected to the shaft should be fixed to the door and window. When installing, please make sure that the hinges on the same fan are on the same vertical line to prevent the doors and windows from jumping. Turn off the sound of the spring and release the test cup.
The hinge is the function of the switch, so this is very important. The outer spring and inner spring are taken from the hinge and assembled with rivets. The sound of the hinge is very clear, if the sound is boring, it will prove that the spring is not strong enough, and the thickness of the material is also problematic. If the hinge cup is loose, if it is loose, the rivet is not tight and it is easy to fall off.
Use PA material
Lightweight, oil resistant, angle 180°
Use ：Instrument box, power distribution cabinet, mechanical doors and windows, etc.