DIALOG Issue 09/2010 (pdf-File) - Rehart GmbH

nanoseal TB Flex S – The New Impact resistant Adhesive
rEHArT is excited to present a new kind
of adhesive with a high degree of impact resistance:
TB Flex S. This was developed on
the basis of shock absorbing polymers, from
which it receives its special strength which
prevents it from breaking due to impacts or
blows. Its extremely high resistance to aggressive
biomasses and organic materials
allows many areas of application.
This provides us with an especially suitable solution
for mechanical engineering, construction
and maintenance. Adhesives are increasingly
being used in these fields as an alternative to
welding, soldering, screw connections, et cetera.
The requirements for this are very high – TB Flex
S fulfills these and allows faster, more flexible
and more reliable work.
The new adhesive TB Flex S has proven itself in
practice with numerous examples. It has been
used on ceramic molds and ceramic cladding
in cyclones, mills and similar constructions and
used to seal or set pump and plant parts subject
to high mechanical and/or chemical stresses.
What are the properties of the new adhesive?
A sufficient amount of plastic raw material must be
present. The machine technology does not distinguish
between hard foreign bodies and hard mass.
This applies both to the separation of hard materials
and soft materials. This defines the application
limits of a separation machine. For this reason, it is
urgently necessary that an additional plasticization
take place prior to the separation process. The
foreign bodies do not need to be distinguished between,
as the entire concept of separation must be
dealt with differently here.
Hard materials should, if possible, be separated at
the beginning of the preparation as these are largest
here, meaning that they are easiest to touch
and do not need to be ground any further. Soft materials
can separated most easily directly before the
shaping process as the greatest degree of plasticization
exists here.
The Separation of soft materials:
In our experience from recent years, the separation
of soft materials has been best accomplished
by the use of the cleaning machine near
the shaping. When using the cleaning machine
between the preparation and the sump or sump
shaping, it is preferable that the machine is posi-
TB Flex S is a two-component
adhesive which is putty-like
after mixing. It is drip proof up
to 1 cm in layer thickness and
can be spread flush. Another
advantage: it can be molded as
desired within ca. 30 minutes.
The material then dries without
shrinkage. It contains no
solvents. TB Flex S is unique
for its high impact resistance. If
an epoxy coating is struck from
behind with a hammer, for example,
it will crack and flake.
This is not the case with TB
Flex S – even after many blows from a hammer
which deform the sheet metal. This is especially
remarkable as TB Flex S has a high hardness of at
least Shore-D 70.
TB Flex S and its unique properties were, of
course, subject to intensive laboratory tests. It
was important that the high adhesive properties
remained high even after storage in typical media.
Continued from the Title Page Separation of hard and soft materials from plastic bulk
tioned directly in front of the vacuum aggregate.
In this manner, the greatest number of impurities
are separated prior to shaping, especially
the dry material which has accumulated during
the preparation process.
The goal must always be to clean the mass with
the highest degree of plasticity. The influence of
the dried mass is also minimized by the positioning
of the cleaning machine before the shaping
process.
Two separation aggregates have proven themselves
for this type of separation:
• The Screen Filter Mixer
• The Clay Cleaner
The Screen Filter Mixer:
The screen filter mixer system builds upon a
double shaft mixer with standard mixer shafts
where the mass is pressed through a transverse,
replaceable screen. In the event of dirtying
and wear of the screen, a clean screen section is
pushed in front of the discharge screw conveyor
transversely. One of the advantages of the screen
filter mixer is a good opportunity to thoroughly
mix the mass with simultaneous plasticization
TB Flex S is not broken after being struck from behind. Standard epoxy adhesive
is broken.
Even after multiple weeks of storage in 30%
caustic soda, propanol or diluted hydrochloric
acid, outstanding results were achieved. The
application options are so diverse that they can
almost certainly solve any construction prob-
lem you may
have.
Contract Partner:
Mr. Friedrich Hornung
Sales Advisory Service
Welding and Composite
Technology
Cell: +49 (0) 171 632 81 49
friedrich.hornung@rehart.de
with steam or water. An economic cleaning with
screen holes up to 5 mm is possible with a standard
screen filter mixer..
The Clay Cleaner ZAR System Krüger with Manual
Stop
The clay cleaner system builds upon a 1-screw
concept with a counter-rotating basket. The
function for the separation of soft materials is
not limited to separation alone: fibers of excessive
lengths which have been trapped in the
screen holes of the basket are reduced in size
and thus can no longer interfere with production.
The amount of waste material is further
reduced thanks to this property. It has been demonstrated
that no automatic loss is necessary
during the separation of soft materials. A manual
stop is wholly sufficient.
The remaining fibers, fiber clumps as well as metal
and plastic parts can be disposed by the cyclic opening
once or twice per week via the manual seal.
A cleaning is possible up to a screen opening of 2.5
mm. The mixing in the machine is low even if a cer-
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