Air bag cover forming apparatus

Details Air bag cover forming apparatus Air bag cover forming apparatus

B - Operations, Transporting

29

C

B29C 33/44 (2006.01) B60R 21/16 (2006.01) B60R 21/20 (2006.01)

Patent

CA 2500561

An apparatus for forming air bag covers includes mold portions (2A, 2B), a grooving blade (3), and a supporting rod (4). The mold portions form a cavity (20) for molding a resin air bag cover (1) provided with an air bag door. The grooving blade forms a break groove (11) defining the air bag door at the air bag cover. The supporting rod supports the air bag door of the air bag cover molded in the cavity. The molding apparatus includes movable cores (21a, 21b) reciprocally movable between a position where the core contacts the air bag cover and a position where the core is separated from the air bag cover. The supporting rod comes into contact with the air bag door when the core is separated from the air bag door, thereby preventing stress concentration on the break groove.

L'invention concerne un appareil de formation du corps de couvercle d'un sac gonflable, qui comprend des moules de formage (2A, 2B), des lames de formage de rainures (3), et des tiges porteuses (4). Les moules de formage produisent une cavité (20) conçue pour créer un corps (1) de couvercle de sac gonflable ayant des parties portes de sac gonflable, les lames de formage de rainures établissent des rainures de rupture (11) déterminant les parties portes dans le corps de couvercle du sac gonflable, et les tiges porteuses soutiennent lesdites parties portes formées dans la cavité. Les moules de formage comprennent des noyaux (21a, 21b) mobiles en va-et-vient entre une position où les moules peuvent jouxter le corps de couvercle du sac gonflable et une position où les moules sont séparés des parties portes dudit corps. Ainsi, lorsque les noyaux sont séparés des parties portes du sac gonflable, les tiges porteuses peuvent jouxter ces parties de manière à empêcher une concentration de contrainte excessive de se produire au niveau des rainures de rupture.

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