Device for heating a press tool, press having such device,...

H - Electricity – 05 – B

Patent

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Details

H05B 6/38 (2006.01) B29C 33/06 (2006.01) B29C 43/52 (2006.01) B30B 15/34 (2006.01) H05B 6/14 (2006.01) H05B 6/36 (2006.01)

Patent

CA 2242973

A device for heating a press tool (4), which is mounted in a press (3) for manufacturing products wholly or partially of plastic or composite, consists of a core (1) of electric sheet steel, a coil arrangement (9, 10, 11) placed around the core (1), and a voltage source (12). The voltage source (12) is connected to the coil arrangement (9, 10, 11) for generating a magnetic field in and around the core (1). The core (1) has two poles (8a, 8b) which, between themselves, receive the press tool (4) and are displaceable in relation to one another for applying a press force to the press tool (4) and conduct the generated magnetic field into the press tool (4). A press (3) comprises such a heating device and is used in a manufacturing method where the press tool (4) is heated by the magnetic field supplied thereto.

La présente invention concerne un dispositif de chauffage d'un outil de presse (4), qui est monté dans une presse (3) de fabrication de produits entièrement ou partiellement faits de matière plastique ou d'un matériau composite. Ce dispositif est constitué par un noyau (1) en tôle d'acier électrique, un système de bobines (9, 10, 11) placé autour du noyau (1) et une source de tension (12). La source de tension (12) est reliée au système de bobines (9, 10, 11) pour produire un champ magnétique dans le noyau (1) et autour de lui. Le noyau (1) a deux pôles (8a, 8b) entre lesquels on place l'outil de presse (4), et qui sont mobiles l'un par rapport à l'autre pour appliquer une force de presse à l'outil de presse (4) et conduire dans ce dernier (4) le champ magnétique produit. L'invention concerne aussi une presse (3) équipée de ce dispositif de chauffage, et qui est utilisée avec un procédé de fabrication selon lequel l'outil de presse (4) est chauffé par le champ magnétique qui lui est fourni.

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