Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting – Controlling heat transfer with molding material
Patent
1988-12-10
1990-01-23
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
Controlling heat transfer with molding material
264315, 264326, 425 40, 425 52, B29C 3502
Patent
active
048956848
ABSTRACT:
The heat-sink capacity of a well-insulated dome curing press lends itself to saving external steam (flowed over the exterior of a mold in the press) when curing an article. Despite shutting off the external steam at about the half-way point in the normal heating cycle, or sooner, the temperature swing at a point 2 inches within the mold is less than 10.degree. F. This small swings allows the point of least cure (PLC) to receive the required number of cure equivalents long after the external steam supply is shut off, that is, while the press is "coasting". In the mean while, the internal heating and cooling cycle of the press may also be shortened for maximum energy savings, or left unchanged. Though the external steam is shut off before the PLC has received the required or specified number of cure equivalents at the PLC, the press-open to press-close cycle remains the same, and the quality of the cure is not measurably affected.
REFERENCES:
patent: 2424915 (1947-07-01), Bosomworth et al.
patent: 2693005 (1954-11-01), Briscoe et al.
patent: 2834984 (1958-05-01), Robbins
patent: 3443280 (1969-04-01), Hugger
patent: 3632712 (1972-01-01), Miller
patent: 3718721 (1973-02-01), Gould et al.
Csontos Alan A.
Lobo Alfred D.
McCarthy Neil M.
Silbaugh Jan H.
The Uniroyal Goodrich Tire Company
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