Method and installation for introducing a cored wire into a...

C - Chemistry – Metallurgy – 21 – C

Patent

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Details

C21C 7/00 (2006.01) B21F 1/02 (2006.01)

Patent

CA 2665307

The method for introducing a cored wire (2) into a bath (3) of molten metal consists in extracting the cored wire from a reel (9), especially from the core of the reel and in making it run into the molten metal bath (3), one part of the path travelled by the cored wire being formed in a guide tube (13), the distal end (32) of which is at a defined height (H) above the surface (PP') of the metal bath (3). The cored wire (2) is driven and subjected to a straightening operation under conditions practically not altering its substantially circular cross section and allowing it to be introduced and penetrate into the depth of the bath in a vertical direction. The installation (1) includes means (12) for driving said cored wire from a reel (9), in which the wire is extracted from the core of the reel, a guide tube (13) for guiding the cored wire (2), the distal end (32) of the tube being at a defined height (H) above the surface of the bath (3) and having a vertical direction, and means (12) for straightening the cored wire (2) that are placed in front of its entry into the guide tube (13), said straightening means being capable of giving the cored wire (2) a straight direction without altering its circular cross section. Preferably, the straightening means consist of a plurality of sets of two press rolls, the contact between the cored wire and each press roll being along a contact surface or along at least two lines of contact.

Le procédé d'introduction d'un fil fourré (2) dans un bain (3) de métal en fusion consiste à extraire le fil fourré d'une bobine (9) notamment depuis le cAEur de la bobine, et à l'entraîner en déplacement jusqu'au bain (3) de métal, une partie du parcours du fil fourré étant réalisée dans un tube de guidage (13) dont l'extrémité distale (32) est à une hauteur déterminée (H) de la surface (PP') du bain (3) de métal. Le fil fourré (2) est entraîné et soumis à une opération de redressement, dans des conditions n'altérant pratiquement pas sa section sensiblement circulaire et permettant son introduction et sa pénétration dans la profondeur du bain selon une direction verticale. L'installation (1) comporte des moyens d'entraînement (12) dudit fil fourré, depuis une bobine (9) dans laquelle l'extraction du fil se fait depuis le cAEur de la bobine, un tube de guidage (13) du fil fourré (2) dont l'extrémité distale (32) est à une hauteur déterminée (H) de la surface du bain (3) et qui a une direction verticale et des moyens de redressement (12) du fil fourré (2) disposés avant son entrée dans le tube de guidage (13), aptes à donner au fil fourré (2) une direction rectiligne sans altération de sa section circulaire. De préférence, les moyens de redressement sont constitués d'une pluralité de jeux de deux rouleaux de pression, le contact entre le fil fourré et chaque rouleau de pression se faisant selon une surface de contact ou selon au moins deux lignes de contact.

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