EoW September 2010

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EuroWire – September 2010 32
technology news
Heavy duty tapers and binders
The capabilities of tangential tapers and yarn binders can
limit the productivity of production lines. In this context
Stolberger KMB-Maschinenfabrik GmbH has updated
and reconstructed its range of tangential tapers and yarn
binders.
Using the new heavy-duty tangential taper, products with
a diameter up to 600mm can be taped. With the heavy-
duty yarn binder, a maximum of 160 yarns can be applied.
The diameter of each of the 160 cops is 500mm.
It can be profitable to consider replacing existing, less
productive, tangential tapers and yarn binders. Simply the
replacement of the rotor bodies and tape guide is often
extremely beneficial.
Stolberger KMB-Maschinenfabrik GmbH – Germany
Fax: +49 2402 86558 129
Email:
Website:
Data cables without
data loss
In wire manufacturing, salt carriers are frequently part of the
coating system that is applied before drawing. On high carbon
wire salt carriers are used as a basis for the drawing process, on
top of conversion coatings or on a bare surface. Their function
is the separation of die and wire, and transfer of lubricant into
the forming die.
The sophisticated composition of the products gives a reduced
sensitivity against humidity and so low water pick up on the
coated wire. This provides a good corrosion protection even
during long storage periods.
Traditionally borax, or formulations containing borax, are used
for this application. Recent investigation of the toxicology of
borax and boric acid initiated by the European Union has
shown that borax acts as a reproduction-toxic substance.
Borax has since been classified as a toxic substance with
a Reprotox category 2 (or according to the GHS System:
Repr. 1B). This reclassification presents a new situation for
the wire drawing industry. New handling techniques are
required for these toxic substances and stricter environmental
regulations have to be applied in the production plants.
Reducing borax content in salt carriers to below the limit of
declaration could, perhaps, be an interim solution. However,
such a measure is questionable, not only because future legal
regulations can hardly be predicted.
The challenge for Chemetall was to formulate salt carrier
coating products completely free of boron. The result of
Chemtall’s R&D efforts is a range of new boron-free carrier
coatings for different applications. First formulations have
been tested successfully in industrial applications in Europe.
Among the newly developed and tested products is
Gardolube® SC 6226. Its properties are at least comparable to
carriers containing borax that are still in use in the market.
Chemetall GmbH – Germany
Website:
Boron-free salt
carrier coatings
The manufacture of data cables demands a consistent control
of the cable diameter, eccentricity and capacitance regarding
periodic variations. Sikora offers several measuring systems
specifically developed for quality control during the data cable
production process.
Laser series 2000 and 6000
The diameter gauge heads of the Laser series 2000 and 6000
operate with the patented Laser Shadow projection principle. By
evaluating diffraction information for the diameter determination,
a single reading precision as high as 0.2µm is achieved. This
precision is maintained for years because no moving parts are
included in these gauges.
Centerview 8000
The Centerview 8000 combines a diameter and eccentricity
measurement, using optical and inductive measuring
technologies.
The generated cloud diagram is an innovative display format of
the ongoing measurement at the processor system Ecocontrol.
It provides information on distribution of short term variation of
eccentricity in graphical form. Each dot corresponds to one single
measuring value of the eccentricity in relation to the amount and
direction. The extension of the cloud diagram is the indicator for
the standard deviation of the eccentricity.
Capacitance 2000
In the Capacitance 2000, a short and a long measuring electrode
are integrated in one tube. The short sensing electrode of
10mm length allows for a reliable measurement of fast periodic
capacitance fluctuations (FFT analysis). The long electrode
measures the capacitance precisely. Structural Return Loss (SRL)
predictions up to 3GHz are feasible at line speeds up to 2.4m per
minute.
Sikora AG – Germany
Fax : +49 421 48900 90
Email:
Website:
Sikora’s Centerview 8000 measuring system ▲ ▲