Apparatus and method for supplying viscous blends that cure

The method of operating apparatus for supplying viscous blends of two or more components that react and cure when blended, the apparatus comprising

• a) one holding tank for each component,
• b) a set of flow controls comprising variable-capacity pumps downstream of each holding tank,
• c) a check valve in or downstream of each set of flow controls, and
• d) a closed loop downstream of each set of flow controls and check valve and leading up to each blender and then back to the holding tank,
• e) each loop extending through FORWARD/DIVERT valves with one intake and two alternatively opening and closing outlets, one outlet forwarding the component on through the loop and the other outlet diverting it out of the loop to one of the blenders,
• wherein the following steps are performed:
• 1. first, the flow controls continue supplying each loop with its particular component until it is fully charged and the component is returning to the holding tank,
• 2. second, the FORWARD/DIVERT valves that divert the components to a particular blender disestablish communications with the loops and divert the components flowing through the loops to the blender
• 3. third, the flow controls remain in operation until the blender contains a specific volume of the components,
• 4. fourth, the first and second steps are repeated with at least one more blender,
• 5. fifth, the blenders proceed to blend the components and condition the blend, and
• 6. sixth, the blend is introduced into compression-setting through the injectors.