Device for producing cross-finned pipes

Details Device for producing cross-finned pipes Device for producing cross-finned pipes

B - Operations, Transporting

29

C

B29C 49/00 (2006.01) B29C 35/16 (2006.01) B29C 49/04 (2006.01) B29C 49/48 (2006.01)

Patent

CA 2278597

Disclosed is a device (10) for producing cross-finned pipes having molding cheek halves (12), which lie adjacent to each other along a common molding segment, have front faces (14, 16) and form a molding channel (18). Each molding cheek half (12) is connected to a supporting member (34) on one surface (32). The supporting members (34) are guided along a first linear guiding device (50). Each molding cheek half (12) is fixed to a guiding and sliding element (56) on a second surface (54). The guiding and sliding elements (56) are guided along a second linear guiding device (66). Both the supporting members (34) and the guiding and sliding elements (56) consist of the same material. The molding cheek halves (12) consist of a material of a relatively small specific weight, having a thermal expansion coefficient (.alpha.B), which is high in comparison with the thermal expansion coefficient (.alpha.A) of the material for the supporting members (34) and the guiding and sliding elements (56). Nonetheless, in order to ensure a tight contact of the molding cheek halves (12), they exhibit a longitudinal extent (B) in the direction of the molding segment, which at the operational temperature (T) of the molding cheek halves (12) is as great as that of the supporting members (34) and that of the guiding and sliding elements (56).

L'invention concerne un dispositif (10) pour produire des tubes à nervures transversales, lequel comporte des demi-mâchoires (12) qui sont adjacentes par leurs faces frontales (14, 16) le long d'une section de moulage commune et qui forment un canal de moulage (18). Chaque demi-mâchoire (12) est reliée à un élément de support (34) sur une surface (32). Les éléments de support (34) sont guidés le long d'un premier système de guidage linéaire (50). Chaque demi-mâchoire (12) est fixée à un élément de guidage et de coulissement (56) sur une deuxième surface (54). Les éléments de guidage et de coulissement (56) sont guidés le long d'un deuxième système de guidage linéaire (66). Les éléments de support (34) et les éléments de guidage et de coulissement (56) sont constitués d'un matériau identique. Les demi-mâchoires (12) sont constituées d'un matériau d'une masse volumique relativement faible, présentant un coefficient de dilatation thermique (.alpha.¿B?) élevé par rapport au coefficient de dilatation thermique (.alpha.¿A?) du matériau constituant les éléments de support (34) et les éléments de guidage et de coulissement (56). Néanmoins, dans le but d'assurer un contact étroit des demi-mâchoires (12), celles-ci présentent, dans le sens de la section de moulage, une étendue longitudinale (B) qui, à la température de service (T) de ces demi-mâchoires (12), est égale à celle des éléments de support (34) et des éléments de guidage et de coulissement (56).

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