Multiple component in-line paint mixing system

• US 6,203,183 B1
• Filed: 04/23/1999
• Issued: 03/20/2001
• Est. Priority Date: 04/23/1999
• Status: Active Grant

• Current Assignee: The Boeing Co.
• Original Assignee: The Boeing Co.
• Inventors: Sim, Thomas R., Mordaunt, Kane M.
• Primary Examiner(s): Walker, W. L.
• Assistant Examiner(s): SORKIN, DAVID L
• Application Number:
  US09/298,347
• Time in Patent Office: 697 Days
• Field of Search: 366/138, 366/140, 366/152.1, 366/160.1, 366/160.2, 366/160.5, 366/162.1, 366/182.4, 366/142, 366/605, 700/265, 700/285
• US Class Current: 366/138
• 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 25/42 in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
• CPC Class Codes: B01F 35/83 by controlling the ratio of two or more flows, e.g. using flow sensing or flow controlling devices
• CPC Class Codes: B01F 35/833 Flow control by valves, e.g. opening intermittently
• 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
• CPC Class Codes: B05B 7/32 the fed liquid or other fluent material being under pressure

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 instruction for use in controlling the mixing of paint subcomponents in a mixing system having input valves, a single flow meter, and a control system;

one input valve being provided to correspond to each paint subcomponent;

the subcomponents being in fluid communication with the single flow meter, with entry into the single flow meter occurring through each corresponding input valve;

the control system being in communication with the input valves and the single flow meter;

the method comprising providing a computer display menu having at least a RUN task selection, where upon selection of the RUN task the method further includes;

(a) determining a total amount of paint to dispense;

(b) determining an amount and a sequence of each paint subcomponent to dispense;

(c) causing the control system to dispense each subcomponent in its determined amount and sequence by opening and closing each corresponding input valve and by measuring the amount of each subcomponent dispensed using the single flow meter; and

(d) tracking the amount of subcomponent dispensed to determine when the total amount is reached.

2. The method according to claim 1, wherein the method further includes calculating an actual mix ratio of the amount dispensed.

3. The method according to claim 1, wherein the paint subcomponents include base, flow, and cure, and the dispensing of each subcomponent includes dispensing so that the subcomponents of base and cure are separated in the single flow meter by the subcomponent flow.

4. The method according to claim 1, wherein the menu further comprises a SETUP task selection, where upon selection of the SETUP task the method further includes determining at least one of a mix ratio, a mix ratio error tolerance, a calibration coefficient, a subcomponent container size, and a low volume threshold.

5. The method according to claim 4, wherein the method further includes displaying at least one of a total run time, a total on time, a calibration coefficient, and an error record.

6. The method according to claim 1, wherein the menu further comprises a CALIBRATE task selection, where upon selection of the CALIBRATE task the method further includes:

(a) determining a subcomponent to be calibrated;

(b) opening the corresponding subcomponent input valve to pass subcomponent fluid through the flow meter;

(c) determining the amount of subcomponent fluid dispensed as measured by the flow meter;

(d) determining the amount of subcomponent fluid dispensed as measured independently; and

(e) differencing the metered flow amount with the independently measured amount to determine an error amount and forming a calibration coefficient.

7. The method according to claim 6, wherein the independently measured subcomponent fluid amount is determined by collecting the dispensed subcomponent fluid from the mixing system and measuring it separately.

8. The method according to claim 6, wherein the paint subcomponents include base, flow, and cure, and the dispensing of each subcomponent includes dispensing so that the subcomponents of base and cure are separated by the subcomponent flow.

9. The method according to claim 6, wherein the method further includes calculating an actual mix ratio of the amount dispensed.

10. The method according to claim 6, wherein the menu further comprises a FLUSH task selection, whereupon selection of the FLUSH task the method further includes determining which portions of the mixing system are to be flushed, determining an appropriate amount of solvent to use for each portion to be flushed, and causing solvent to be passed through each portion in the appropriate amount.

11. The method according to claim 6, wherein the method further includes determining whether the error amount is within a tolerable amount.

12. The method according to claim 6, wherein the method further includes displaying the calibration coefficient.

13. The method according to claim 1, wherein the menu further comprises a FLUSH task selection, whereupon selection of the FLUSH task the method further includes determining which portions of the mixing system are to be flushed, determining an appropriate amount of solvent to use for each portion to be flushed, and causing solvent to be passed through each portion in the appropriate amount.