Curing (vulcanization)

While there are different types available, most curing presses are massive devices.

They hold two tire molds that resemble two open clamshells side-by-side. They have water, air, vacuum and steam lines attached, plus conveyors, and have automatic loading devices for placing the green tires over curing bladders in the center of each mold

As the mold closes, a bladder (rubber made) inside the tire expands and presses the green tire against the mold. The high bladder pressure (several hundred psi) forces the uncured rubber into every detail of the inner surface of the mold. Super-heated steam or hot water is then circulated within the bladder and around the mold for about 12 to 15 minutes. This rise in temperature causes a chemical reaction (curing, or vulcanization) to occur in the rubber compounds whereby the long polymer molecules become crosslinked together by sulfur or other curatives. The rubber compounds are transformed in this way into strong, elastic materials in the finished, cured tire. Curing times, temperatures and pressure are computer-controlled to give full cure of the chosen rubber compounds.

We have on stock different curing presses of all kinds and of all sizes  for passenger tires (PCR), off the road tires (OTR), tuck, agricultural tractor and implement tires.

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