Coating processes – Direct application of electrical – magnetic – wave – or... – Electrostatic charge – field – or force utilized
Patent
1998-02-26
2000-06-06
Parker, Fred J.
Coating processes
Direct application of electrical, magnetic, wave, or...
Electrostatic charge, field, or force utilized
4273742, 4274193, 4274194, 427427, 427435, B05D 110, B05D 136, B05D 118
Patent
active
060715715
ABSTRACT:
A two-step method to porcelain-coat an article is provided particularly useful for porcelain-coating a gas burner used in a gas-fired residential barbecue grill. A gas burner constructed from mild enameling-grade steel is dipped in a slip containing porcelain frit and manipulated so that the slip adequately coats and adheres to the interior surfaces of the burner. The porcelain-containing slip simultaneously coats and adheres to the peripheral "shoulders" and particularly to the interior "shoulders", of the gas jet openings of the burner. A second coating of porcelain-containing powder is then applied, for example, electrostatically or by other conventional powder application techniques, to the exterior surfaces of the burner. The properties of the porcelain-containing powder of the second coating are adjusted for optimal coating properties. Then, the double coated gas burner is fired in a continuous furnace at a peak firing temperature of 1480.degree. F. to 1550.degree. F., with a target of 1530.degree. F..+-.10.degree. F. for about ten minutes, which adequately bonds the porcelain to the steel gas burner.
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Lerch Allan C.
Tracey Michael E.
Higgins, Jr. James R.
Parker Fred J.
Porcelain Metals Corporation, Inc.
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