Provided is a mold release agent composition containing a polymer ester, the composition exerting a good mold releasability even when the temperature of mold increases, and a die casting method using the composition.

Provided is a mold release agent composition containing a polymer ester, the composition exerting a good mold releasability even when the temperature of mold increases, and a die casting method using the composition.

A casting mold and a production method thereof with which exfoliation of coating is controlled and liquidity of molten metal can be maintained are provided. This casting mold 1 includes a surface processing part 3 in which a plurality of groove parts 5 of a grid groove 4 formed in a surface of a molten metal contact part of a mold material 2 is coated with a carbon film 6. In this surface processing part 3, a width W1 of the groove parts 5 is 35 m or narrower, skewness Ssk of three-dimensional surface roughness is in a range of 0.8 to 0.2, and indentation hardness of the carbon film 6 tested by a nanoindenter is 1000 N/mm.sup.2 or higher. With this arrangement, it is possible to optimize the surface processing part 3 in such a manner that a penetration rate of the molten metal (aluminum 10) is controlled to be low and the coating (carbon film 6) is unlikely to exfoliate from the groove parts 5.

A casting mold and a production method thereof with which exfoliation of coating is controlled and liquidity of molten metal can be maintained are provided. This casting mold 1 includes a surface processing part 3 in which a plurality of groove parts 5 of a grid groove 4 formed in a surface of a molten metal contact part of a mold material 2 is coated with a carbon film 6. In this surface processing part 3, a width W1 of the groove parts 5 is 35 m or narrower, skewness Ssk of three-dimensional surface roughness is in a range of 0.8 to 0.2, and indentation hardness of the carbon film 6 tested by a nanoindenter is 1000 N/mm.sup.2 or higher. With this arrangement, it is possible to optimize the surface processing part 3 in such a manner that a penetration rate of the molten metal (aluminum 10) is controlled to be low and the coating (carbon film 6) is unlikely to exfoliate from the groove parts 5.

A casting device in which refrigerant is pressure-fed to a cooling passage formed in a die, leakage of refrigerant in the die can be reliably detected in a short time without a significant modification applied to the conventional device. A casting device includes a pressure-feed device that pressure-feeds refrigerant to a cooling passage formed in a die, and a release agent coating applicator that applies a release agent to the die, and further includes a unit that mixes a fluorescent agent into the refrigerant (fluorescent agent tank), a unit that irradiates the die surface of the die with black light while the refrigerant containing the fluorescent agent mixed therein is pressure-fed to the die, and an imaging device that captures an image of the die surface. The imaging device is integrally assembled with the release agent coating applicator.

A casting device in which refrigerant is pressure-fed to a cooling passage formed in a die, leakage of refrigerant in the die can be reliably detected in a short time without a significant modification applied to the conventional device. A casting device includes a pressure-feed device that pressure-feeds refrigerant to a cooling passage formed in a die, and a release agent coating applicator that applies a release agent to the die, and further includes a unit that mixes a fluorescent agent into the refrigerant (fluorescent agent tank), a unit that irradiates the die surface of the die with black light while the refrigerant containing the fluorescent agent mixed therein is pressure-fed to the die, and an imaging device that captures an image of the die surface. The imaging device is integrally assembled with the release agent coating applicator.

A casting core assembly includes a metallic core, a ceramic core having a compartment in which the portion of the metallic core is received, and a ceramic coating at least partially covering the metallic core and the ceramic core.

A casting core assembly includes a metallic core, a ceramic core having a compartment in which the portion of the metallic core is received, and a ceramic coating at least partially covering the metallic core and the ceramic core.

A refractory metal core laminate assembly, comprising: a first refractory metal core layer having exterior surfaces and a first side and a second side opposite the first side; a second refractory metal core layer having exterior surfaces and a first side and a second side opposite the first side, the second refractory metal core layer being arranged above the first refractory metal core layer with the second refractory metal core layer first side facing the first refractory metal core layer second side; a layer of a powder bed material between the first refractory metal core layer second side and the second refractory metal core layer first side; and a coating of the powder bed material coupled to the first refractory metal core layer exterior surfaces and the second refractory metal core layer exterior surfaces.

A refractory metal core laminate assembly, comprising: a first refractory metal core layer having exterior surfaces and a first side and a second side opposite the first side; a second refractory metal core layer having exterior surfaces and a first side and a second side opposite the first side, the second refractory metal core layer being arranged above the first refractory metal core layer with the second refractory metal core layer first side facing the first refractory metal core layer second side; a layer of a powder bed material between the first refractory metal core layer second side and the second refractory metal core layer first side; and a coating of the powder bed material coupled to the first refractory metal core layer exterior surfaces and the second refractory metal core layer exterior surfaces.