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HINGES ELECTRONIC SELECTOR
Guidelines for the right application of plastic hinges
The following guidelines help you to choose the convenient type and the right number of hinges according to the door to be hinged. Technical designers should consider the values Er, Ea, E90 reported in the table of every plastic hinge. Maximum working load (Er, Ea, E90) is the value at which elastic deformation remains neglectable during functioning. Load at breakage (Rr, Ra, R90) should be used for safety verification, if required.
In case of use of CFN. and CFO. hinges, considering the geometry and the structure of such elements, E90 value is not to be taken into consideration. So the conditions here under reported, where E90 appears, are not valid.
Hinged door on a vertical axis
These are the three conditions to be verified:
[(P•D1)+(P1•D2)] / D3 ≤ Er with closed door
(P+P1) / N ≤ Ea
[(P•D1)+(P1•D2)] / D3 ≤ E90 with 90° open door (*)
Hinged door on a horizontal axis
These are the two conditions to be verified:
(P+P1) / N ≤ Er with closed door
(P+P1) / 2N ≤ E90 with 90° open door (*)
(in the case of balanced additional extra load on the door)
Application
H / V
Horizzontal or Vertical
P
Newton
Weight of the door
P1
Newton
additional extra load applied (if any)
N
nr
number of hinges
D1
meters
distance between the barycenter of the door and the hinge axis
D2
meters
distance between the hinge axis and additional extra load application point
D3
meters
sum of the distances of all the hinges from the hinge of reference
Er min
Ea min
E90 min
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