Disappearance die casting method and casting product

Abstract

The invention discloses a disappearance die casting method and a casting product. The method comprises the following steps of: drying a coating material so as to place a disappearance mould white mould (1) in a sand box (3), filling dried sand in the sand box (3) so as to finish modeling, carrying out vacuum pumping on the sand box (3) and carrying out casting, wherein a proteiform position of the disappearance mould white mould (1) is provided with a support member (2) for preventing the proteiform position from generating transformation. The support member is utilized to support the proteiform position, the transformation of the disappearance mould white mould in a painting, module assembling and modeling process is prevented, and the casting with a required shape is obtained after finishing casting.

Description

technical field [0001] The present invention relates to lost foam casting, in particular, to a lost foam casting method and a cast product cast using the method. Background technique [0002] Lost foam casting is a lost foam white mold made of foam material similar in size and shape to the casting, brushed with refractory paint and dried, buried in dry sand for vibration molding, and then poured under negative pressure to vaporize the model and liquid A new casting method in which metal occupies the position of the model, solidifies and cools to form a casting. Lost foam casting has the advantages of high casting precision, flexible design, and clean production. However, since the lost foam white mold is made of foam material, it is highly sensitive to temperature. If the temperature of the dry sand used for molding is too high, the lost foam white mold is easily deformed during the molding process, resulting in deformation of the final casting. In addition, in the product...

AI Technical Summary

Problems solved by technology

However, since the lost foam white mold is made of foam material, it is highly sensitive to temperature. If the temperature of the dry sand used for molding is too high, the lost foam white mold is easily deformed during the molding process, resulting in deformation of the final casting

In addition, in the production process, due to the external force of the coating and molding process, as well as the vibration and vacuum of the dry sand during the molding process, it is also easy to deform the lost foam white mold.

Among them, taking the concrete conveying elbow casting as an example, during the production process, when the nozzle of the lost foam white mold is deformed, the nozzle of the final casting becomes oval. Due to the hardness of the casting material, it cannot be processed and corrected, resulting in Large misalignment will occur when castings are assembled with related components (such as wear sleeves), which seriously hinders the smoothness of concrete delivery

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