System and method for determining parameters for foam production

Patent metadata

Field	Value
Publication number	US-12311331-B2
Application number	US-202318854139-A
Country	US
Kind code	B2
Filing date	Mar 29, 2023
Priority date	Apr 8, 2022
Publication date	May 27, 2025
Grant date	May 27, 2025

Abstract

A method determines machine parameters of a foam production machine is provided. The foam production machine includes a mixing head configured to mix precursor reagents for forming a reactive mixture, a plurality of inclined fall plates, where a first inclined fall plate is configured to receive the reactive mixture, and where each inclined fall plate has vertically adjustable ends, and a conveyor configured to receive the reactive mixture from a last inclined fall plate, the conveyor having an adjustable conveyor speed. The method includes executing software by a computer system, including accessing a database for reading a rise profile for the reactive mixture of the precursor reagents and computing, based on the rise profile, vertical positions for the ends of each inclined fall plate and the conveyor speed resulting in a predefined predicted profile of the reactive mixture on the plurality of inclined fall plates.

First claim

The invention claimed is:

1. A method for determining machine parameters of a foam production machine, the foam production machine including comprising:
a mixing head configured to mix precursor reagents for forming a reactive mixture,
a plurality of inclined fall plates, wherein a first inclined fall plate is configured to receive the reactive mixture, and wherein each inclined fall plate has vertically adjustable ends, and
a conveyor configured to receive the reactive mixture from a last inclined fall plate, the conveyor having an adjustable conveyor speed, the method comprising:
executing software by a computer system, the computer system comprising at least one processor, wherein executing the software comprises:
accessing a database for reading a rise profile for the reactive mixture of the precursor reagents, the rise profile comprising a height of the mixture as a function of time as the precursor reagents react to form a foam; and
computing, based on the rise profile, vertical positions for the ends of each inclined fall plate and the conveyor speed resulting in a predefined predicted profile of the reactive mixture on the plurality of inclined fall plates as the reactive mixture is transported along the plurality of inclined fall plates.

2. The method of claim 1 , wherein the method further comprises:
mixing the precursor reagents in a receptacle for forming a second reactive mixture, the receptacle external to the foam production machine;
measuring a height of a top surface of the second reactive mixture as a function of time in the receptacle for generating the rise profile; and
storing the rise profile in the database.

3. The method of claim 2 , wherein mixing the precursor reagents in the receptacle for forming the second reactive mixture and measuring the height of the top surface of the second reactive mixture as a function of time in the receptacle for generating the rise profile are performed under environmental conditions that match environmental conditions in operating the foam production machine, wherein matching environmental conditions comprises matching at least one environmental parameter.

4. The method of claim 2 , wherein the receptacle is stationary.

5. The method of claim 2 , wherein movement of the mixture with respect to the receptacle includes only a movement of the top surface of the mixture as the height of the top surface increases.

6. The method of claim 2 , wherein the foam production machine further comprises a transport medium positioned between a bottom surface of the reactive mixture and the plurality of inclined fall plates and the conveyor, wherein the conveyor is configured to pull the transport medium and the reactive mixture along the plurality of inclined fall plates at the conveyor speed for transporting the reactive mixture along the plurality of inclined fall plates.

7. The method of claim 6 , wherein the transport medium is a paper sheet.

8. The method of claim 6 , wherein the receptacle comprises a process liner, and wherein a chemical composition of at least a surface of the transport medium of the foam production machine matches a chemical composition of at least a surface of the process liner used for generating the rise profile stored in the database, wherein the surfaces are in contact with the respective reactive mixtures.

9. The method of claim 1 , wherein the precursor reagents comprise at least one liquid polymer and at least one catalyst.

10. The method of claim 9 , wherein the at least one liquid polymer comprises at least one liquid polyurethane.

11. The method of claim 1 , wherein the foam production machine comprises a trough, wherein the trough has a bottom surface comprising an input port configured to receive the reactive mixture from the mixing head and a side surface comprising a side surface lip over which the reactive mixture flows onto a proximate end of the first inclined fall plate, and wherein computing is further based on one or more characteristics selected from the group consisting of a vertical position of the side surface lip of the trough relative to a vertical position of the proximate end of the first inclined fall plate and a size of the trough as defined by a length between the bottom surface of the trough and the side surface lip of the trough.

12. The method of claim 1 , wherein the predefined predicted profile has a substantially flat top surface, the substantially flat top surface having an inclination angle of approximately arctan [(predefined fraction of a height of a foam on the conveyor)/(a horizontal length of the plurality of inclined fall plates)].

13. The method of claim 12 , wherein the predefined fraction of the height of the foam on the conveyor is approximately ⅓ the height of the foam on the conveyor.

14. The method of claim 1 , wherein the method further comprises:
prompting a user to adjust one or more of the computed vertical positions of the ends of each inclined fall plate and/or the conveyor speed for adjusting a predicted profile of the reactive mixture on the conveyor belt to have a substantially flat top surface.

15. The method of claim 1 , wherein the computer system comprises a network and a cloud server, wherein the cloud server comprises the at least one processor, wherein a user has an account with the cloud server, wherein the cloud server comprises a cloud database, and wherein the method further comprises:
authorizing, by the cloud server, access of the user to the cloud server based at least upon a user profile stored in the cloud database; and
executing, by the cloud server, the software, wherein executing the software further comprises automatically reading from the cloud database the rise profile for the reactive mixture of precursor reagents based on the user profile.

16. The method of claim 15 , wherein the user profile includes comprises purchase information of at least one of the precursor reagents.

17. The method of claim 15 , wherein the method further comprises:
scanning a machine-readable code associated with at least one of the precursor reagents upon delivery of the at least one of the precursor reagents to the user, wherein automatically reading from the cloud database the rise profile comprises automatically reading from the cloud database the rise profile based on the scanned machine-readable code.

18. The method of claim 1 , wherein the foam production machine further comprises at least one machine processor, controller software and an actuation unit, wherein the method further comprises:
outputting, by the processor, the computed vertical positions for the ends of each inclined fall plate and the conveyor belt speed;
executing, by the at least one machine processor, the controller software;
receiving, by the at least one machine processor, the outputted computed vertical positions for the ends of each inclined fall plate and the conveyor belt speed; and
setting, by the actuation unit, the parameters of the foam production machine for producing the foam.

19. A computer-readable medium storing instructions that, when executed by a computer, cause it to perform the method of claim 1 .

Assignees

• Evonik Operations Gmbh

Inventors

• Landers Rüdiger
• Tomuschat Philipp
• Kiwitt Jörn

Classifications

• C08J2375/04

  Polyurethanes · CPC title

• C08J2205/06

  Flexible foams · CPC title

• C08J9/00

  Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof (mechanical aspects of shaping of plastics or substances in a plastic state for the production of porous or cellular articles B29C) · CPC title

• B01J2219/002

  inside the reactor · CPC title

• B01J19/24

  Stationary reactors without moving elements inside (B01J19/08, B01J19/26 take precedence; with stationary particles B01J8/02) · CPC title