Melt Reservoir

Melt Reservoir for pressure and volume flow constant filtration

In some applications the use of a KREYENBORG melt reservoir offers an alternative to the V-type screen changer. In combination with a continuous backflush screen changer (normally K-SWE-4K-75/RS) and a melt pump it constitutes a control oriented unit and provides a pressure and volume flow constant melt filtration.

In this combination the melt reservoir lives up to its name. During the production - shortly before a backflushing becomes necessary - it constantly takes a small quantity of the melt flow and stores it. This process is effected by a fine control, so that there will be no pressure fluctuations in the following process.

In that moment in which the backflushing is effected at the screen changer and the flushed material is removed from the process, the melt reservoir will release the stored melt for compensation. Thus a continuously constant volume flow behind the screen changer and hence in the following process is ensured.

The use of a melt reservoir instead of a V-type screen changer depends on the exact process data.

In principle also existing backflush screen changers may be upgraded by a melt reservoir for pressure and volume flow constant filtration.

Melt reservoir 121/125

Application

for very sensitive processes (e. g. productions of packing straps)
for compounding, fibre production, direct extrusion
for processing of an especially high portion of recycled material with high pollution degree (e.g. PET bottle flakes)

Materials

suitable for almost all polymers
especially suited for recycled PET material

Function

component of a volume flow constant filtration system combined with a melt pump and a backflush screen changer
complete implementation of all components into a control oriented unit
fully automatic control by melt pressure sensor and process conditionally programmable parameters