MICROWAVE-ASSISTED PRESS CURE PROCESSING OF FRICTION PADS
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United States of America Patent
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Issued Date -
Jan 15, 2009
app pub date -
Jul 10, 2007
filing date -
Jul 10, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method and apparatus is provided for forming an in-mold cured brake pad (16). A mold (24) includes sidewalls (28) through which a window (24) made from a generally lossless material such as alumina is formed. Microwaves (42) are directed through the window (46) and into the die cavity (26) of the mold (24) to provide supplemental heating and thereby accelerate the manufacturing cycle time. The friction material composition is tuned by adding an effective quantity of titania or other suitable agent which has the advantage of moving the absorption band for the heat-curable material into the standard band (50) of the microwaves (42) produced by a low-cost magnetron (40), and also of self-regulating the absorption characteristics of the heat-curable material so as to reduce or eliminate the tendency to thermal runaway.
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