A new face drilling rig for narrow tunnels and ... - Advanced Mining

BaCkers Ma s C h i n e n B a U gM Bh
Issue 04 | 2010
NEWS & REPORTS
NEW: Star Screen Technology at its Best
Backer’s Premium Star Screen!
Star screens can be compared to tires. There are
tires for cars, trucks, wheel loaders, etc., with different
attachments, either with or without spikes.
This is more or less the same with star screens.
Even higher screening performance, even more
difficult screen inserts, even finer screening, even
longer operating lives…..and even better prices.
Since 1989, the star screening technique has
constantly been advanced at the Backer company, as
research and development are seen as investments
into the future. This is of advantage for the client, for
the Backers company, as well as for the environment. It
enables more rational operating procedures with higher
throughput, minimization of wear and consequent
savings of resources, as well as offering the possibility
to process material with poor flow properties.
In 2010 the centerpiece of the star screen technique
– “the star screen shafts and the screen deck” were
completely overhauled. From 2011 onwards, the
Backers company will offer the “Backer premium star
sieve”, in addition to the classic star screen.
In the classic version, star screens with a cast-on
hub are inserted. In this system the stars are mostly
put on from one side. A fine distribution with small
stars is particularly difficult.
In the “Backers premium star screen” star discs
made from elastic material, as well as hard distance
parts with long operating life and low adhesion are
used.
The stars and the massive outer discs are fixed
very accurately from the sides, which result in a very
accurate distribution. A fine sieving of up to 5 (4) mm
cross cut is possible. Furthermore the sieve deck and
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