| 摘要 |
The invention relates to a diecasting die (7) and a diecasting method for sprueless diecasting, in particular in a diecasting hot-runner system (1), wherein the diecasting die (7) is provided in a feeding region (8) for forming a plug of solidified molten material (22) that interrupts a flow of the molten material and can be completely remelted. The problem addressed by the present invention is therefore that of providing a diecasting die and a diecasting method according to the preamble of the invention that are suitable for different molten materials, in which a heating acts directly on the molten material with high power and largely without delay, a cooling is not required and the injection-moulding method can be carried out at a high operating machine speed and under feeding conditions that can be monitored and reproduced well. The problem is solved by the feeding region (8) comprising direct resistance heating that produces a melting heat and is in direct thermal contact with the molten material (22). The problem is also solved by a diecasting method with the method steps of closing the casting mould, heating the diecasting die (7), melting the plug in the feeding region (8), stopping the heating, injecting the molten material (22) into the casting mould, maintaining the pressure of the molten material (22), solidifying the molten material (22) in the casting mould and in the feeding region (8) of the diecasting die (7), opening the casting mould (43, 44) and removing a cast part from the casting mould. |
