Multiple component in-line paint mixing system

• US 5,887,975 A
• Filed: 09/30/1997
• Issued: 03/30/1999
• Est. Priority Date: 09/30/1997
• Status: Expired due to Fees

• Current Assignee: The Boeing Co.
• Original Assignee: The Boeing Co.
• Inventors: Sim, Thomas R., Mordaunt, Kane M.
• Primary Examiner(s): SOOHOO, TONY GLEN
• Application Number:
  US08/940,616
• Time in Patent Office: 546 Days
• Field of Search: 366/152.1, 366/152.2, 366/151.1, 366/150.1, 366/177.1, 366/179.1, 366/182.1, 366/336, 366/348, 366/605, 137/3, 137/602, 137/896, 137/897, 222/71, 222/1, 239/8
• US Class Current: 366/152.1
• CPC Class Codes: B01F 2101/30 Mixing paints or paint ingredients, e.g. pigments, dyes, colours, lacquers or enamel
• CPC Class Codes: B01F 23/49 Mixing systems, i.e. flow charts or diagrams
• CPC Class Codes: B01F 33/84 Mixing plants with mixing receptacles receiving material dispensed from several component receptacles, e.g. paint tins
• CPC Class Codes: B01F 35/20 Measuring; Control or regulation
• CPC Class Codes: B01F 35/21 Measuring
• CPC Class Codes: B01F 35/2211 Amount of delivered fluid during a period
• CPC Class Codes: B01F 35/88 by feeding the materials batchwise
• CPC Class Codes: B05B 12/1418 for supplying several liquids or other fluent materials in selected proportions to a single spray outlet controlling ratio of two or more flows of fluid G05D11/02

Abstract

An in-line mixing system and method for mixing one or more paint fluid subcomponents. The system includes subcomponent input lines (20) connected to a reducing manifold (22). An on/off solenoid valve (28) in each line is arranged to allow or prohibit fluid from entering the reducing manifold. The reducing manifold includes multiple input passages that converge to form a single output passage. A flow meter (26) is in communication with the manifold output passage to measure the flow of subcomponent fluid through the manifold. Using the flow meter, a control system (30) causes the input line solenoid valves to open and close to create a slugwise line of subcomponent fluids passing from the manifold output passage. From the reducing manifold, the slugwise line enters an integrator (32) where the subcomponents are partially mixed. A static mixer (34) connects to the output of the integrator to thoroughly mix the fluids. Preferred embodiments of a mixing system, an integrator, and an control instruction system are provided.

Claims

1. A method of mixing paint from multiple paint fluid subcomponents, the method comprising:

(a) forming a line of unmixed subcomponent slugs by providing a reducing manifold having multiple input passages that converge to form a single output passage, providing a flow meter in communication with the single manifold output passage, and inputting a particular quantity of subcomponent into the manifold input passages by metering the amount of fluid passing through the output passage; and

(b) thoroughly mixing the slugwise subcomponents using an integrator and a static mixer.

2. The method of mixing paint according to claim 1, wherein the multiple subcomponents are at least three subcomponents and the multiple input passages are at least three input passages.

3. The method of mixing paint according to claim 1, wherein the flow meter is a positive displacement gear-type flow meter.

4. The method of mixing system according to claim 1, therein the flow meter is a mass flow meter.

5. The method of mixing paint according to claim 1, further comprising passing air over the controller to remove any possibility of contact between paint subcomponent and electricity.

6. The method of mixing paint according to claim 1, wherein the thorough mixing of the slugwise subcomponents includes initially mixing the subcomponents in the integrator and more thorough mixing in the static mixer.

7. The method of mixing paint according to claim 6, wherein the integrator includes a sealed container, an influent tube located within the container and having a series of holes, and an exfluent tube located within the container and having a series of holes;

the initial mixing in the integrator including;

(a) passing the subcomponent slugs from the reducing manifold to the influent tube and out the influent tube holes to partially mix the subcomponents; and

(b) passing the partially mixed subcomponents into the exfluent tube holes and out of the exfluent tube and integrator to the static mixer.

8. The method of mixing paint according to claim 7, wherein the influent and exfluent holes vary in size.

9. The method of mixing paint according to claim 1, wherein the inputting of a subcomponent into the reducing manifold is accomplished by opening and closing a dedicated input line valve in communication with each manifold input passage.

10. The method of mixing paint according to claim 9 further comprising a control system including a controller in communication with the flow meter and the input line valves, the control system for causing the opening and closing of the input line valves and the metering of the flow meter.

11. The method of mixing paint according to claim 10, wherein the input line valves are direct-acting electrically operated solenoid valves and the controller is capable of electronically switching the input line valves between their open and closed positions.

12. The method of mixing paint according to claim 10, wherein the controller includes a computer including user interface means.

13. A method of mixing paint from multiple paint fluid subcomponents, the method comprising:

(a) forming a line of unmixed subcomponent slugs of base, cure, and flow, wherein a flow slug is inserted between base and cure slugs to separate the base and cure slugs; and

(b) thoroughly mixing the slugwise subcomponents.

14. The method of mixing paint according to claim 13, wherein the mixing is accomplished using an integrator and a static mixer.

15. The method of mixing paint according to claim 13, wherein the forming comprises:

(a) providing a reducing manifold having at least one base input passage, at least one flow input passage, and at least one cure input passage;

the input passages converging to form a single output passage;

the line of unmixed subcomponent slugs passing out the output passage;

(b) providing a flow meter in communication with the single manifold output passage; and

(c) inputting a particular quantity of subcomponent into the manifold input passages by metering the amount of fluid passing from the output passage.

16. The method of mixing paint according to claim 15, wherein the inputting of a subcomponent into the reducing manifold is accomplished by opening and closing a dedicated input line valve in communication with each manifold input passage.

17. The method of mixing paint according to claim 16, further comprising a control system including a controller in communication with the flow meter and the input line valves, the control system for opening and closing the input line valves and metering the flow meter.

18. The method of mixing paint according to claim 17, wherein the controller includes a computer including user interface means.