Three-plate pressure die casting mold having improved sprue separation, and method for pressure die casting
AssigneeBayerische Motoren Werke Aktiengesellschaft
InventorsOlaf Hentschel, Andre Schaefer, Manfred Tremmel
Life of this patent
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Abstract
A three-plate pressure die casting mold for producing at least one metallic die casting part by die casting a metal melt, includes first, second and third mold parts and at least one mold cavity as well as a sprue system. A relatively movable pressure plate is arranged in the third mold part, which, when opening the die casting mold, presses the sprue produced in the sprue system against the first mold part, whereby the sprue is retained and tears off from the die casting part in a defined manner. A method for pressure die casting using the three-plate pressure die casting mold is disclosed.
Claims10
A three-plate die casting mold for producing a metal die-cast part by die casting a metal melt, the die casting mold comprising:
- a first mold part, a second mold part, and a third mold part, with the third mold part being arranged between the first and the second mold parts;
- a die cavity;
- a sprue system, through which the metal melt is fed to the die cavity;
- and
- a relatively movable pressing plate arranged in the third mold part, wherein:
- when the die casting mold is being opened, a sprue created in the sprue system is torn off from the die-cast part created in the die cavity and the die-cast part is removable by way of a first mold parting plane between the second mold part and the third mold part, and the sprue is removable by way of a second mold parting plane between the first mold part and the third mold part, and
- when the die casting mold is being opened in the second mold parting plane, the relatively movable pressing plate in the third mold part moves relative to the third mold part so as to press the sprue against the first mold part, whereby the sprue is retained within the second mold part so as to tear off from the die-cast part in a defined manner.
A method for producing a metal die-cast part, comprising:
- providing a three-plate die casting mold comprising:
- a first mold part, a second mold part, and a third mold part, with the third mold part being arranged between the first and the second mold parts;
- a die cavity;
- a sprue system, through which a metal melt is fed to the die cavity;
- and
- a relatively movable pressing plate arranged in the third mold part, wherein a first mold parting plane is between the second mold part and the third mold part, and a second mold parting plane is between the first mold part and the third mold part;
- closing the die casting mold and carrying out a die casting operation, with metal melt being pressed into the die cavity through the sprue system;
- opening the die casting mold after the metal melt has solidified, wherein:
- when the die casting mold is being opened, a sprue created in the sprue system is torn off from the die-cast part created in the die cavity and the die-cast part is removable by way of the first mold parting plane, and the sprue is removable by way of the second mold parting plane, and
- when the die casting mold is being opened in the second mold parting plane, the relatively movable pressing plate moves relative to the third mold part so as to press the sprue against the first mold part, whereby the sprue is retained within the second mold part so as to tear off from the die-cast part in a defined manner.
Dependencies are inferred from the claim text.