Returnable valve trays on the job at Ford Motor Company

This case history about Ford Motor Company comes courtesy of Creative Techniques. It has been selected and edited by the MHM editorial staff for clarity, content and style.

Precision Components Demand Special Handling Requirements
Engine valves are manufactured by first tier automotive suppliers to the exacting requirements of the automotive OEM. Truly precision components, these parts are critical to the performance and long-term life of a car's engine. Any step along the path of an engine valve's method of production and final assembly must not compromise the product quality of the valve.

As a result, when Ford Motor Company began to design and builda new engine facility, virtually all product handling and assembly methods were carefully reviewed and often, re-engineered.

An Old Way and a New Way
Traditionally, engine valves that were manufactured on the outside were most often wrapped in wax-like paper and placed in bulk in cardboard boxes, which were then banded to wooden skids for outbound shipping. Manufacturing plants receiving these components would then de-palletize these boxes and stage them at assembly work stations, where an assembly line worker would unwrap the valves and manually place them in the cylinder head of the engine.

Despite these relatively standard handling and shipping practices, there were a number of potential problems long the route. First, there is a large amount of expendable packaging that would be continually required and used or shipping the valves, despite ever-increasing environmental concerns, legislation, and disposal costs. Second, there was also a tremendous amount of indirect labor hours that were involved in the packaging and handling. Both of these are continual costs that would be spent each time a valve was manufactured, unlike the one-time, fixed cost of a returnable packaging system.

Next, valves are relatively heavy parts that can be densely packed, causing the cardboard boxes to potentially exceed ergonomic guidelines.

Finally, disposable packaging can cause product contamination with fiber and paper dust, and manual handling leaves opportunities for dropping or damaging valves, both concerns when it comes to product quality.

Returnable Packaging Solves Problems
The solution for the handling of these engine valves was to engineer an injection-molded plastic returnable shipping tray with automated interface capabilities, thereby eliminating excess labor, packaging materials, disposal costs, and eliminating potential quality issues.

Creative Techniques was invited to participate in the early stages of this project, working in a simultaneous engineering approach with Ford Motor Company, the valve supplier (Eaton Corp., Kearney, Nebraska), and the assembly system integrator. The result was a valve tray that was ergonomic in design, fit AIAG (Automotive Industry Action Group) pallet footprint requirements, segregated the valves during transport, and allowed for complete automated interface and valve handling. Not only was the final tray design and material selection cost effective, but they would also allow for the repeated washing and associated temperatures that these trays would see during their return trips to the valve supplier.

Ford's benefits included a faster and more consistent method of valve train assembly, with improved quality, and reduced packaging material and labor costs.

MHMonline.com welcomes relevant, exclusive case histories that explain in specific detail the business benefits that new software and material-handling equipment has provided to specific users. Send submissions to Clyde Witt([email protected]), MHM Editor-in-Chief. All submissions will be edited for clarity, content and style.

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