MACHINE FOR PRODUCING FOAMS, HOMOGENEOUS OR STRUCTURAL MATERIALS FROM AT LEAST TWO LIQUID REACTION COMPONENTS

• US 3,857,550 A
• Filed: 04/12/1973
• Issued: 12/31/1974
• Est. Priority Date: 04/20/1972
• Status: Expired due to Term

• Current Assignee: Heinrich Boden, Heinrich Ersfeld, Reiner Moeres, Ulrich Knipp, Walter Schneider
• Original Assignee: Heinrich Boden, Heinrich Ersfeld, Reiner Moeres, Ulrich Knipp, Walter Schneider
• Inventors: Boden, Heinrich, Ersfeld, Heinrich, Schneider, Walter, Moeres, Reiner, Knipp, Ulrich
• Primary Examiner(s): Jenkins, Robert W.
• Application Number:
  US05/350,675
• Time in Patent Office: 628 Days
• Field of Search: 259/4,7,8,18,23,24,43,44 23/252R 251/248,250,318,319
• US Class Current: 366/159.1
• CPC Class Codes: B29B 7/603 in measured doses, e.g. proportioning of several materials
• CPC Class Codes: B29B 7/7626 using measuring chambers of piston or plunger type B29B7/7621 takes precedence; for mixing in general B01F35/882
• CPC Class Codes: B29B 7/7631 Parts; Accessories B29B7/7684 takes precedence
• CPC Class Codes: B29B 7/801 Valves
• CPC Class Codes: Y02P 20/582 Recycling of unreacted starting or intermediate materials
• CPC Class Codes: Y10S 521/917 Specialized mixing apparatus utilized in cell forming process

Abstract

In the mixing head of a foaming machine, the delivery pipes open into slides displaceable in the mixing head and provided with injection openings, the wall of the mixing chamber having a cutout for each slide valve in which part of the wall surface of the slide valve forms the wall of the mixing chamber.

Claims

1. An apparatus for mixing at least two liquid reaction components, and molding the resulting reaction product comprising a storage container for each reaction component, delivery pipes which lead from each storage container to a mixer comprising a mixing chamber, a slide valve being arranged at the end of each delivery pipe, the slide valves being coupled with one another for movement, wherein each slide valve comprises an injection opening and is arranged in a cut-out in opposite walls of the mixing chamber, so that part of the wall surface of the slide valve forms the wall of the mixing chamber and the injection openings may be aligned with the cut-outs.

2. An apparatus as claimed in claim 1, wherein the slide valves are in the form of rotary slide valves.

3. An apparatus as claimed in claim 2, wherein the rotary slide valves comprise interengaging gear wheels, one of which meshes with a rack provided with an adjusting drive.

4. An apparatus as claimed in claim 2 wherein the edges of the cutouts in the wall of the mixing chamber are in the form of control edges and the rotary slide valves comprise independent axial adjusting means.

5. An apparatus as claimed in claim 1, wherein the slide valves are in the form of axial slide valves.

6. An apparatus as claimed in claim 5, wherein the axial slide valves are connected to a hydraulic or pneumatic adjusting means.

7. An apparatus as claimed in claim 5 wherein the edges of the cutouts in the wall of the mixing chamber are in the form of control edges and the axial slide valves comprise a rotary adjusting means.

8. An apparatus as claimed in claim 1 wherein the edges of the cutouts in the wall of the mixing chamber are in the form of control edges and an adjustable stop mechanism is associated with the slide valves in the working position direction, that is when the injection openings are aligned with the cutouts.

9. An apparatus as claimed in claim 8, wherein the control edges are inclined to the vertical.

10. An apparatus as claimed in claim 1 wherein the slide valves comprise return bores which correspond with return pipes which connect the mixer to the storage containers.

11. An apparatus as claimed in claim 10, wherein each return pipe has a throttle zone.

12. An apparatus as claimed in claim 11, wherein the free cross sections of the throttle zones in each slide valve are adjustable.

13. An apparatus as claimed in claim 10, wherein the return bores of the slide valves are in the form of throttle zones.

14. An apparatus as claimed in claim 1 wherein a dividing plane runs through the mixing chamber.

15. An apparatus as claimed in claim 1 wherein each slide valve has a cavity therein for pushing mixture residue out of the mixing chamber.