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Standard
FINLIGHT can be easily and economically worked with any
standardtools used in metal and wood industries. Both
are especially easy to handle, transport and store,thanks
to their exceptional light weight.
Cutting:-
Standard FINLIGHT sheets are easily
cut using a straight, finely serrated blademounted on
a hand-saw, band-saw, disk-saw or jig-saw. As a rule,
it recommended to use low cutting feedrates and high cutting
speeds. In extreme cases, it is recommended that the cutting
blades be cooled withcompressed air.
Fastening:-
Standard FINLIGHT can be screwed, nailed and bolted in
place. It is recommended that a large washer be used to
distribute load on a wider area.
Printing:-
All
conventional printing techniques may be applied to Standard
FINLIGHT Sheets must be clean and dry before printing.
Adhesive
Bonding:-
Standard formulations for P.V.C. bonding may be used,
aswell as most Neoprene based adhesives.For maximum structural
bonding strength, two-part adhesive kits are recommended.To
fix temporarily, pressure-sensitiveself-adhering tapes
or pads ma be used.
Welding:
-
Standard
FINLIGHT sheet can be welded to each other or to other
rigidP.V.C.sheets with standard hot-air welding equipment,
or using the Hot-Blade method.
Standard FINLIGHT require the same treatment as other
thermoplastic materials, as follows :-
*Proper preparation of the surfaces to be joined.
* Selecting the appropriate welding temperature.
* Correct joining pressure or force
For
Hot - air Welding :
* It is essential that there be
even heat distribution on the welded surfaces. Localized
overheating (hot spots)
must be avoided.
* Excellent results are obtained with normal P.V.C.
Recommended
Working Conditions :
* Angle starting groove of 60 C.
* Welding temperature approx. 280 - 290 C.
* Welding speed approx. 1 ft / min.
For
Hot Blade Welding :
* For butt welding of 3.0 mm 6.0
m thick.
Standard FINLIGHT the time and temperature may very slightly
according to the sheet
thickness.
* Hot Blade temperatures : 240 - 250 C
Fabrication
Data
Insert Table
Thermoforming:-
Standard FINLIGHT are lightly expanded
materials, due to their closed cell structure. However,they
can be thermoformed using vacvuum forming, pressure forming
or a combination of the two. Standard tools used in thermoforming
of plastic sheets may be used on Standard FINLIGHT Larger
Standard FINLIGHT sheets require air support to avoid
excessive sagging. For shallow forms almost any type of
equipment for conventional thermoforming will produce
satisfactory results. For more complex deep draw forms,
double-sided (sandwich-type) heaters are necessary. Standard
FINLIGHT's reaction to working is markedly different from
solid plastics. The working cycle is usually shorter,
and the radius and depth of draw are limited to the extent
that the surface of the material will stretch.
Forming
Temperature
A.
THERMO-ELASTIC RANGE 115 - 130
C
Good extensibility of material, contour definitions are
somewhat limid. The ORIGINAL somoot Standard FINLIGHT
and FINLIGHT 2001 surface is retained. Recommended maximum
draw ratio h:d approx. 1:1.25
B.
THERMO-ELASTIC
RANGE 160 - 170 C.
Medium extensibility, contour definition excellent, surface
gets a grainy look due to slight after-expansion in the
skin. Larger sheets need air support to prevent sagging.
At thermoforming temperatures of 160 - 170 C slight changes
in colour of the shet may take place.
Heating
Cycle
With
radiation heat sources, the heating cycles are much shorter
than for solid plastics, and depend on the type of forming
machine. Ceramic type infrared heaters are most suitable.
Double sided (top & bottom) heating is strongly recommended,
especially for thicker sheets.
Approximate
Heating Cycle for Single-Sided Heating With Ceramic Heaters
:
Heater Element Temperature : 450 C
Power Density : 20 kw / sq.m.
Insert Table
Approximate
Heating Cycle for Double-Sided Heating With Ceramic Heaters
:
Heater Temperature :- Top - 380 C, Bottom - 150 C Power
density : 40 kw / sq.m.
Insert Table
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