Method for producing a filter element provided with a sealing part

Patent metadata

Field	Value
Publication number	US-10960333-B2
Application number	US-201916435763-A
Country	US
Kind code	B2
Filing date	Jun 10, 2019
Priority date	Mar 21, 2012
Publication date	Mar 30, 2021
Grant date	Mar 30, 2021

Abstract

A method for producing a filter element provided with a sealing part in which the sealing material is introduced into a casting chamber between two tundish parts when in the non-cured state, and a compensation space connected to the casting chamber for the expansion of the sealing material.

First claim

We claim:

1. A method for the production of a filter element ( 5 ) provided with a sealing part ( 6 ), comprising the steps of:
providing a shaped filter media shaped for forming the filter element( 5 ) the shaped filter media having a flow face and an adjacent lateral side, the flow face is an inflow face or an outflow face;
providing a casting apparatus ( 1 ) having a plurality of tundish parts, including:
a first tundish part ( 2 ) defining a first chamber wall of a casting chamber ( 7 ); and
a second tundish part ( 3 ) defining a second chamber wall of a casting chamber ( 7 );
wherein the casting chamber ( 7 ) is arranged so that a sealing surface ( 11 ), an opposing sealing surface ( 12 ) and a further sealing surface ( 13 ) are formed on opposite chamber walls of the sealing part ( 6 );

placing the shaped filter media in position in the first and second tundish parts such the filter media abuts against the first tundish part ( 2 ) and the second tundish part ( 3 );
wherein the shaped filter media is placed such that an edge portion of adjacent filter element faces forms wall portions closing the casting chamber ( 7 ), such that the first tundish part ( 2 ), the second tundish part ( 3 ) together with the shaped filter media together at least partially define the casting chamber ( 7 );
casting the sealing part by steps of:
introducing a sealing material ( 7 ) in a non-cured state into the casting chamber ( 7 ); and
curing of the sealing material ( 7 ) in the casting chamber ( 7 ), forming the sealing surface ( 11 ) and the opposing sealing surface ( 12 ) of the sealing part ( 6 );
wherein the casting chamber ( 7 ) is arranged so that the sealing surface ( 11 ), the opposing sealing surface ( 12 ) are formed on opposite chamber walls of the sealing part ( 6 ).

2. The method according to claim 1 , wherein in casting step, the sealing material is a PUR foam (polyurethane).

3. The method according to claim 1 , wherein an end face ( 9 ) of the sealing part ( 6 ) abuts at least one of the sealing surfaces ( 11 , 12 , 13 ) of the sealing part ( 6 ).

4. The method according to claim 1 , wherein a compensation space ( 8 ) is arranged as a closed space within at least one of the tundish parts ( 2 , 3 ).

5. The method according to claim 4 , wherein an amount of non-cured sealing material introduced into the casting chamber ( 7 ) is dimensioned such that in the cured state, the end face ( 9 ) of the sealing part ( 6 ) is situated at a distance from a bottom ( 10 ) of the compensation space ( 8 ).

6. The method according to claim 4 , wherein the compensation space is formed ( 8 ) as an open space in communication with the casting chamber ( 7 ).

7. The method according to claim 1 , wherein after curing step, the method further comprises
providing at least one side of the sealing part ( 6 ) with a chamfer ( 18 , 19 ).

8. The method according to claim 1 , wherein
an axial direction, as defined herein, is a direction normal to a plane defined by the flow face;
wherein a tip portion of the first tundish part ( 2 ) in the casting chamber ( 7 ) defines a groove in the sealing part ( 6 ) having a bottom surface ( 11 ) in the groove;
wherein the second tundish part ( 3 ) in the casting chamber ( 7 ) has a recess ( 12 ) defining an opposing sealing surface ( 12 ) of the sealing part arranged opposite the bottom surface ( 11 ) of the groove;
wherein the tip of the first tundish part projects in an axial direction towards the recess of the second tundish part;
wherein the recess of the second tundish part is aligned axially with the projecting tip of the first tundish part.

9. A filter element ( 5 ) produced by a method according to claim 1 .

Assignees

• Mann & Hummel Gmbh

Inventors

• Sudermann Arthur
• Wagner Fabian
• Sieber Thomas
• Goerg Guenter
• Metzger Michael
• Roehrig Markus
• Jessberger Thomas
• Dirnberger Timo
• Joos Bernd

Classifications

• B29L2031/14

  Filters {(optical filters B29L2011/0066, sieves or screens B29L2031/737)} · CPC title

• B01D46/42

  Auxiliary equipment or operation thereof · CPC title

• F02M35/02408

  Manufacturing filter elements · CPC title

• B29K2105/04

  cellular or porous · CPC title

• B01D2271/02

  Gaskets, sealings · CPC title