System and method for active adhesive recirculation control

Patent metadata

Field	Value
Publication number	US-10758934-B2
Application number	US-201715697711-A
Country	US
Kind code	B2
Filing date	Sep 7, 2017
Priority date	Sep 8, 2016
Publication date	Sep 1, 2020
Grant date	Sep 1, 2020

Abstract

A method for controlling a recirculation pump assembly is disclosed. The method includes receiving a process-dependent characteristic and determining a recirculation flow rate of adhesive that flows to the recirculation pump assembly based on the process-dependent characteristic. The method further includes determining a recirculation pump speed of the recirculation pump assembly for pumping the adhesive to a supply channel using the recirculation flow rate, and adjusting an operating speed of the recirculation pump assembly to match the recirculation pump speed. A system and storage device for performing the above method are also disclosed.

First claim

What is claimed is:

1. A method for controlling a recirculation pump assembly, the method comprising:
receiving a process-dependent characteristic;
determining a recirculation flow rate of an adhesive that flows to the recirculation pump assembly based on the process-dependent characteristic;
determining, based on the recirculation flow rate of the adhesive, a desired recirculation pump speed of the recirculation pump assembly, the recirculation pump assembly configured to pump the adhesive to a supply channel that supplies the adhesive to one or more application pump assemblies separate from the recirculation pump assembly; and
adjusting an operating speed of the recirculation pump assembly to match the desired recirculation pump speed.

2. The method of claim 1 , wherein the process-dependent characteristic includes a maximum pump speed for the one or more application pump assemblies, an instantaneous line speed, a maximum line speed, a pattern length, or a number of patterns per minute.

3. The method of claim 2 , wherein the instantaneous line speed and the maximum line speed represent a number of substrates per minute or a distance between substrates per minute.

4. The method of claim 1 , wherein the process-dependent characteristic includes a maximum flow rate of adhesive applied to substrates.

5. The method of claim 1 , wherein the process-dependent characteristic includes product type, product skew, or adhesive type.

6. The method of claim 1 , wherein the process-dependent characteristic includes descriptive characteristics that represent a unique adhesive dispensing operation, the method further comprising:
obtaining numerical characteristics of the unique adhesive dispensing operation.

7. The method of claim 1 , wherein receiving the process-dependent characteristic comprises receiving, from a user at a human-machine interface, the process-dependent characteristic.

8. The method of claim 1 , wherein determining the desired recirculation pump speed of the recirculation pump assembly includes dividing the recirculation flow rate by a maximum volumetric output of the recirculation pump assembly to determine the desired recirculation pump speed of the recirculation pump assembly.

9. The method of claim 1 , wherein determining the desired recirculation pump speed of the recirculation pump assembly includes multiplying the desired recirculation pump speed by a gearbox reduction ratio of the recirculation pump assembly to determine a recirculation motor speed.

10. The method of claim 1 , further comprising tuning the operating speed of the recirculation pump assembly.

11. The method of claim 10 , wherein tuning the operating speed of the recirculation pump assembly is automatically performed.

12. The method of claim 10 , wherein tuning the operating speed of the recirculation pump assembly includes receiving adjustments to the operating speed of the recirculation pump assembly.

Assignees

• Nordson Corp

Inventors

• Saine Joel E
• Fritz John W

Classifications

• B05B11/1049

  Attachment arrangements comprising a deformable or resilient ferrule clamped or locked onto the neck of the container by displacing, e.g. sliding, a sleeve surrounding the ferrule · CPC title

• B05C5/0225 Primary

  characterised by flow controlling means, e.g. valves, located proximate the outlet (B05C5/0258, B05C5/0275 take precedence; supply valves upstream the coating head B05C11/1036) · CPC title

• B01F25/62

  of the gear type · CPC title

• B01F25/54

  provided with a pump inside the receptacle to recirculate the material within the receptacle · CPC title

• B05C11/1026

  Valves (in general F16K; B05C5/0225 takes precedence) · CPC title