| 摘要 |
The invention is a new automatic door for molten metal holding furnaces, comprising a fixed plate with charging and inspection hole, provided with two supports positioned at the sides of the charging hole and with two vertical wings positioned on the upper part of the plate; two guides with rectangular hole are hinged to the two vertical wings positioned on the upper part of the plate and directed downwards, beyond the lower edge of the charging hole; the closing panel with gasket is equipped with lateral pins that in turn are housed in the rectangular holes of the guides, said pins and guides being suitable for making the closing panel slide along the guides. One or more pressuremechanisms, acting on the lower end of the guides, rotate the guides in such a way as to bring the closing panel in contact with the plate hole and press the panel against the hole or to move it away from the plate. A hydraulic cylinder controls the translation of the closing panel along the guides with rectangular hole.
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