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The
following scheme shows an aluminium profile with
thermal break :
An aluminium profile insulated with thermal break
(polyamide or other plastic) consists of an assembling
process of three parts : |
a. upper aluminium extrusion
b. thermal break(s)
c. lower aluminium extrusion |
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Generally three operations
are required for the assembly:
1. the swallow's tail groves from both the upper- and
lower extrusions must be notched
to prevent a lateral shifting during the
heat treatment after the painting process, and to get
high push-off values;
2. the aluminium extrusions must be assembled with the
strips;
3. finally the aluminium teeth, forming the exterior
parts of the swallow's tails,
must be rollformed to lock the strips. A certain stress
must be permanently introduced during this final stage
to achieve high push-off values
and as such a strong composite. |
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