Tire mold, method and tire

Details Tire mold, method and tire Tire mold, method and tire

B - Operations, Transporting

29

D

B29D 30/66 (2006.01) B29C 33/10 (2006.01) B29D 30/06 (2006.01) B29C 33/42 (2006.01)

Patent

CA 2047632

In a tire mold having a pair of mold parts separable about cooperating surfaces of the respective mold parts which define a parting line region, each of the mold parts includes a surface defining at least a portion of a cavity for shaping a tire. The tire mold further includes a plurality of pockets for defining a respective plurality of circumferentially arranged tread elements in the tire. The improvement comprises a vacuum source in fluid communication with the cavity of the tire mold for evacuating fluid from the cavity in the tire mold through a space located between the surfaces of the mold parts which define the parting line region. A vent fluidly connects a pair of adjacent pockets. A passage associated with one of the mold parts provides fluid communication between the vacuum source and one of the pair of adjacent pockets connected by the vent.

Moule de pneu constitué de deux parties séparables à l'endroit où des surfaces de chacune des parties du moule se réunissent pour former un joint de moulage. Chacune des parties du moule comprend une surface définissant au moins une partie de la cavité dans laquelle est formé le pneu. Le moule comprend plusieurs poches logeant un nombre correspondant d'éléments de la bande de roulement du pneu et étant disposées autour de celui-ci. L'innovation a trait à un dispositif à vide permettant au liquide de s'évaporer de la cavité du moule de pneu par un espace situé entre les surfaces des parties du moule réunies pour former le joint de moulage. Un trou d'air permet l'écoulement fluide entre deux poches adjacentes. Un passage associé à l'une des parties du moule permet l'écoulement du fluide du dispositif à vide à une des deux poches adjacentes reliées par le trou d'air.

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