Device for applying a foaming reaction mixture

Patent metadata

Field	Value
Publication number	US-9718223-B2
Application number	US-201314372040-A
Country	US
Kind code	B2
Filing date	Jan 15, 2013
Priority date	Jan 16, 2012
Publication date	Aug 1, 2017
Grant date	Aug 1, 2017

Abstract

The invention relates to a device ( 100 ) for applying a foaming reaction mixture ( 600 ) onto a top layer ( 500 ), in particular for producing a composite element, comprising at least two casting rakes ( 200, 260 ), each of which comprises a tubular hollow body ( 210 ), said hollow body ( 210 ) extending along a central axis ( 250 ) and having at least two outlet openings ( 220 ) for discharging the foaming reaction mixture ( 600 ). The casting rakes ( 200, 260 ) and the top layer ( 500 ) can be moved relative to one another in a longitudinal axis ( 510 ), and the casting rakes ( 200, 260 ) are arranged on a receiving element ( 700 ). According to the invention, each arrangement of the casting rakes ( 200, 260 ) on the receiving element ( 700 ) has a joint ( 805 ), by means of which the casting rakes ( 200, 260 ) are movably arranged on the receiving element ( 700 ) and can be oriented at an angle ( 400, 410 ) of <=80 DEG relative to the longitudinal axis ( 510 ) of the movement.

First claim

The invention claimed is:

1. A process for producing a composite element, comprising applying a foaming reaction mixture to a moving covering layer with an apparatus, the apparatus comprising:
an accommodation element;
at least two casting rakes movably attached to the accommodation element, each casting rake having a tubular hollow body which extends along a central axis and has each casting rake having at least two outlet openings for exit of the foaming reaction mixture; and
at least two joints by means of which the casting rakes are arranged movably on the accommodation element, each joint connecting a casting rake to the accommodation element;
wherein the at least two casting rakes concurrently apply the foaming reaction mixture to the moving covering layer;
wherein the at least two casting rakes and the covering layer move relative to one another along a longitudinal axis parallel to the direction of motion of the covering layer; and
wherein the casting rakes are directed at an angle of ≦80° relative to the longitudinal axis.

2. The process as claimed in claim 1 , wherein the foaming reaction mixture has an isocyanate-reactive component and an isocyanate component.

3. The process as claimed in claim 1 , wherein the covering layer consists of a metal, a plastic, a glass fiber-containing material, a mineral fiber-containing material and/or a cellulose-containing material.

4. The process as claimed in claim 1 , wherein:
the accommodation element comprises a mixing head and a 3-way piece, and at least two components for forming the foaming reaction mixture are combined in the mixing head, and
each joint comprising a ball joint that connects the 3-way piece and a casting rake, wherein the casting rakes are movably attached to the 3-way piece, and the casting rakes are fluidically connected to the mixing head.

5. The process as claimed in claim 4 , wherein the casting rakes each have a feed line and each feed line is part of the ball joint, and wherein the ball joint includes a ball joint cup formed on the respective feed line, and a ball joint head corresponding to the ball joint cup formed on the 3-way piece.

6. The process as claimed in claim 4 , wherein the casting rakes each have a feed line and each feed line is a part of the ball joint, and wherein each ball joint includes a ball joint head formed on the respective feedline and a ball joint cup corresponding to the ball joint head formed on the 3-way piece.

7. The process as claimed in claim 1 , wherein the central axes of the casting rakes are aligned via the joint connected to each casting rake at an angle in the range from 60° to 80° relative to the longitudinal axis.

8. The process as claimed in claim 5 , wherein the ball joint cup and the ball joint head are detachably joined to one another in a fluid-tight manner via a coupling element which comprises a screw clamp or a spring clamp.

9. The process as claimed in claim 5 , wherein the ball joint cup and/or the ball joint head have a sealing surface which provides a fluid-tight connection between the ball joint cup and the ball joint head.

10. The process as claimed in claim 1 , wherein the outlet openings are formed by exit tubes which are aligned at an exit angle of ≧5°, relative to an axis orthogonal to the moving covering layer.

11. The process as claimed in claim 1 , wherein each of the joints comprises a ball joint.

12. The process as claimed in claim 1 , wherein each of the joints are independently articulable to an angle of ≦80° relative to the longitudinal axis.

13. The process as claimed in claim 1 , wherein the tubular hollow body of each casting rake comprises a support strip clipped into a lower exit side of the tubular hollow body so as to form a closed tubular hollow body.

14. The process as claimed in claim 13 , wherein each casting rake comprises at least two exit tubes extending from the tubular hollow body, and wherein the exit tubes are arranged on the support strip.

15. The process as claimed in claim 1 , wherein each casting rake comprises at least two exit tubes extending from the tubular hollow body, and wherein the at least two outlet openings are respectively located at ends of the at least two exit tubes opposite the tubular hollow body.

16. The process as claimed in claim 15 , wherein the apparatus further comprises at least two feed lines, each feed line fluidly connecting the accommodation element to a casting rake, and wherein the feed lines connect to the casting rakes at a location intermediate the opposite ends of the tubular hollow body.

17. The process as claimed in claim 16 , wherein the tubular hollow body and the feed line are integrally formed and run essentially parallel to each other.

18. The process as claimed in claim 1 , wherein the foaming reaction mixture produces a polyurethane foam or a polyisocyanurate foam.

19. The process as claimed in claim 1 , wherein the covering layer comprises a sheet, film, or foil made of a material selected from the group consisting of coated steel, stainless steel, aluminum, copper, an aluminum alloy, a copper alloy, a polymer, glass fibers, mineral fibers, paper, paperboard, and paper mache.

Assignees

• Covestro Deutschland Ag

Inventors

• Köster Ralf

Classifications

• B05C5/025

  only at particular part of the work (at particular part of separate articles B05C5/0212) · CPC title

• B05D7/14

  to metal, e.g. car bodies (involving a chemical reaction between the metal and the coating C23) · CPC title

• B29C44/461 Primary

  dispensing apparatus, e.g. dispensing foaming resin over the whole width of the moving surface · CPC title

• B05D1/34

  Applying different liquids or other fluent materials simultaneously · CPC title

• B05C5/027

  Coating heads with several outlets, e.g. aligned transversally to the moving direction of a web to be coated (B05C5/0254 takes precedence) · CPC title