Nordson Corporation

Kreyenborg Verwaltungen Und Beteiligungen Gmbh & Co. Kg

Kreyenborg Gmbh

Nordson Holdings S.à R.l. & Co. Kg

Jan-Udo Kreyenborg

Stefan Wöstmann

Robert Middler

Rolf-R&uuml;diger Stude

The invention relates to a dirt precipitator () for a highly viscous medium, having a housing comprising a front housing element (') that comprises at least one inlet channel () and a rear housing element () that comprises at least one outlet channel (), and having a screen wheel (&#x2032;) rotatably mounted between the housing elements (&#x2032;) having a number n of screen positions disposed in a ring zone, on each of which at least one screen opening () having at least one screen insert element is provided. The inlet channel (), the outlet channel (), and the screen opening () are disposed flush one after the other in at least one working position and form a flow channel. In all positions of the screen wheel (&#x2032;), more than 50% of the screen openings () are always able to be permeated, and are impinged by flow from at least one inlet channel and from which at least one outlet channel leads.

Dirt precipitator for a highly viscous medium

A filter device for extruders and injection moulding machines designed to process thermoplastics, comprising filter elements that are fitted in at least two separate ducts of a housing between at least one main admission duct and one main exit duct and are interchangeably mounted in sieve carrier bolts in sieve openings that can be moved inwards and outwards with said sieve carrier bolts in the respective bore hole of the housing. At least one locking mechanism is provided in the vicinity of the main admission duct upstream from the sieve carrier bolts. When in a flow position, the locking mechanism does not impede the flow of plastic from the main admission duct to the filter elements. However, when the locking mechanism is in a locking position, the flow of plastic in a partial admission duct is separated from the main admission duct, whereby a) the filter elements in the sieve carrier bolts are configured in an oval shape in a manner that is known per se, whereby the long axis of the oval extends in the direction of displacement of the sieve carrier bolts and the length of the oval axis of the filter elements in relation to the length of the housing bore hole is selected in such a way that only the length of the sieve carrier bolts required to seal the sieve carrier bolts in the housing bore hole is devoid of filter elements and b) the partial admission ducts for each sieve opening open out into at least two flow ducts.

Filter device for extruders and injection moulding machines

The invention relates to a filter device for extruders and injection-molding machines for the continuous processing of thermoplastic, the throughflow bore in the screen plunger being of a round design in the region of the inlet side and of the screen chamber and narrowing ovally following on from the rear side of the screen pack, the long axis of the oval extending in the direction of the displacement direction of the screen plunger.

Growing community of inventors

Münster, Germany

Jan-Udo Kreyenborg