Injection molding of a tire component

B - Operations – Transporting – 29 – C

Patent

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Details

B29C 35/02 (2006.01) B29C 45/03 (2006.01) B29C 45/26 (2006.01) B29C 45/27 (2006.01) B29C 45/32 (2006.01) B29C 45/42 (2006.01) B29D 30/48 (2006.01) B29D 30/52 (2006.01)

Patent

CA 2228617

Molds for injection molding tire components have controlled temperature passages leading to a manifold (40) surrounding each mold cavity (16). The manifold (40) is positioned to minimize weld lines in the injected tire component (18). In addition, a narrow gate opening (42, 44, 46) between the manifold (40) and mold cavity (16) provides an elevated temperature of the injected material for decreasing the curing time of the tire component in the mold. Blade members (48) may support and position tire components (50) such as bead apex assemblies in the mold. These tire components (18) may be unloaded by an unloader ring (172) in communication with a source of vacuum for pulling the tire component out of the mold.

Moules pour moulage par injection de constituants de pneu possédant des passages à température régulée conduisant à un distributeur (40) entourant chaque cavité (16) de moulage. Ledit distributeur (40) est placé de manière à minimiser les lignes de soudage dans le constituant (18) de pneu injecté. De plus, une ouverture étroite (42, 44, 46) entre le distributeur (40) et la cavité de moulage (16) fournit une température élevée du matériau injecté afin de réduire la durée de durcissement du constituant de pneu dans le moule. Des lames (48) peuvent soutenir et garder en position les constituants (50) de pneu tels que les ensembles talons dans le moule. Ces constituants (18) de pneu peuvent être déchargés par un anneau déchargeur (172) en communication avec une source de vide de manière à tirer le constituant du pneu à l'extérieur du moule.

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