Automotive, Plastics and Coating Operations

Why this industry cleans differently

In most plants the question is how to remove the material. Here the question is what the removal method will do to the surface underneath, because the surfaces are expensive, precise and frequently coated, and because the cost of damaging one is not the cost of cleaning it again.

A mold cavity has a surface finish that took money to produce. A robot arm carries sensors and cabling. A weld fixture holds a tolerance. A painted booth surface cannot take contamination. On all of these, the methods that work elsewhere, pressure, abrasive, chemistry, soaking, are either unavailable or carry a risk that the plant will not accept.

That is why dry ice leads most scopes in this industry rather than supporting them. It removes the contaminant and not the substrate, it introduces no water into an environment that cannot have it, and it leaves no media behind to collect afterwards. The whole planning conversation is shaped by that.

Where the work is

• Molds, dies, tooling and cavity surfaces
• Presses, platens and machine interiors
• Weld cells, fixtures, guns, tips and robot arms
• Paint booths, grating, ducting, hangers and carriers
• Conveyors, skids, transfers and part handling
• E-coat, pretreatment and the structure around them
• Material handling: hoppers, silos, ducting, regrind and collection
• Overhead steel, lighting and ventilation above cells and lines
• Floors and structure in press, stamping and machining areas

The shutdown calendar decides everything

Automotive is the most calendar-driven industry Kelly works in. The summer and holiday shutdowns are set a year ahead, they are the only substantial windows in the year, and every plant and every supplier in a region wants the same days. A scope that is not booked against a specific window on that calendar does not happen, and a scope booked late gets whatever access is left.

Kelly plans backwards from the window. Scope and crew size are agreed months ahead, sequencing accounts for the mechanical, electrical and tooling work happening in the same space, and the plan states plainly what fits in the hours available and what does not. Where the honest answer is that the full scope needs more window than exists, we say so while there is still time to split it across two shutdowns rather than discovering it on day four.

Between shutdowns, most of the real work happens on weekend downs and on the tooling maintenance cycle, which for a high-cavitation mold runs far more often than any plant shutdown. A settled program in this industry usually has those two rhythms running independently.

Weld cells and the cycle time nobody attributes to cleaning

Spatter and smoke accumulate on fixtures, clamps, tips, guns and the cell enclosure. The effect is gradual: locating surfaces lose accuracy, tips need changing more often, sensors read less reliably, and the cell spends more of its cycle on things that are not welding. Because it happens slowly, it is rarely attributed to housekeeping.

A cell cleaned properly during a down usually returns something measurable, and plants that track cell performance can see it. The work is done under the plant’s lockout procedure with the cell isolated and verified, and released back through whatever validation the plant requires. In practice the validation is the scheduling constraint more often than the cleaning is.

Plastics dust, treated as what it is

Resin dust, regrind fines and buffing dust are combustible. A plastics operation moves them through hoppers, ducting, silos, cyclones and collectors, which is a system that concentrates fine material, moving air and mechanical equipment in enclosed volumes. NFPA 660 covers it, and the standard’s requirements are the same here as anywhere: know the material, keep accumulation below a threshold, clean with equipment that cannot be the ignition source, and document it.

The part that gets missed is that the risk sits inside the handling system rather than on the visible surfaces of the plant. A plastics operation with an immaculate floor and an uninspected collector has the problem in the place where it matters. Kelly cleans the system, with bonded and grounded equipment, and reports condition as well as accumulation.

Who is in the building

Automotive plants care about who is inside them in a way most industries do not. Certification, customer audits and plant rules all extend to contractor personnel: training records, insurance, who they are employed by, and what they were inducted on.

Every Kelly technician is a full-time Kelly employee. No brokered labor, no subcontracted crews, no different faces each visit. That is straightforward to evidence when a plant or its customer asks, and it is one of the reasons the same crews return to the same plants across model years.