Filter device for cleaning plastics melts
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United States of America Patent
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-
Dec 4, 2001
Grant Date -
N/A
app pub date -
May 9, 2000
filing date -
May 18, 1999
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A filter device for filtering plastic melts includes a filter wheel having cavities which are covered by screening elements. A pressure sensor is provided in a melt inflow line upstream of the filter wheel. A pressure sensor is also provided in a melt outflow line downstream of the filter wheel. The pressure sensors measure the pressure drop across the filter. The melt inflow and outflow lines are connected to a melt channel in the filter device, respectively. A melt return line is in connection via a pump and a discharge line with a backflushing slot. The discharge line is connected to an accelerator for increasing pressure in surges. A further melt return/discharge line is connected via a 3-way valve and a return line to the melt inflow line or to a disposal line.
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