Process engineering was asked by manufacturing to look at reducing cycle time in the conveyorized tin strip line. All process change requests at H-R Industries must be evaluated from four points of view, quality, cycle time, environmental, and cost. To reduce cycle time we reduced chemical maintenance time by bailing out spent tin strip solution and adding fresh solution during the week and setting up a scheduled dump and clean on Saturday. We had dumped the tin strip solution when ever it reached a prescribed specific gravity. This new process yielded positive results in cycle time environmental impact, and cost with no reduction in quality of the product.
Steady stating active chemical concentrations in circuit board fabrication allows for reduced variation in processing.
The process change reduces purchases of tin strip at current production levels by 2,000 gallons per year. The change reduces waste generating by 1,700 gallons per year.
Details of Reductions
Additional Information :
Total annual savings including reduced purchase of chemicals, waste disposal, and labor costs are $25,000 for a project with the only initiation cost being labor for running the evaluation and changing the standards operating procedure.