Casting method of iron mold used for sand-coated iron mold casting technique

Abstract

The invention discloses a casting method of an iron mold used for the sand-coated iron mold casting technique. The casting method of the iron mold used for the sand-coated iron mold casting techniquemainly comprises the steps that an iron mold cavity core prepared from core sand obtained by mixing phenolic resin with furan resin is used, and a planar core sand flat plate is arranged when the upper plane of the iron core is formed; a lower sand mold body and an upper sand mold body of the iron mold are manufactured; the upper sand mold body and the lower sand mold body of the iron mold are assembled and placed in a sprue cup so as to be cast; and mold opening is conducted after cooling, and thus the iron mold is prepared. According to the casting method of the iron mold used for the sand-coated iron mold casting technique, the good cast appearance of the iron mold is ensured, and it is ensured that a sand coating is uniform and consistent when an iron mold cavity is in use.

Description

technical field [0001] The invention belongs to the field of iron mold sand-covered casting, and in particular relates to a casting method of an iron mold used in the iron mold sand-coated casting process. Background technique [0002] Iron mold, as a tool that must be used in the iron mold sand-coating process, its casting quality directly affects the quality of products produced with it. [0003] When the iron mold is made, the core that forms the cavity is used. When the traditional core is made, the core sand used is a mixture of raw sand and synthetic grease. During the baking process after the core is formed, Synthetic grease will be transformed into polluting waste gas emission, seriously polluting the environment, and can no longer meet the existing environmental protection requirements; the core sand core made of synthetic grease and raw sand, after the molten iron is injected into the cavity during the iron mold making process, Due to the characteristics of the co...

AI Technical Summary

Problems solved by technology

[0003] When the iron mold is made, the core that forms the cavity is used. When the traditional core is made, the core sand used is a mixture of raw sand and synthetic grease. During the baking process after the core is formed, Synthetic grease will be transformed into polluting waste gas emission, seriously polluting the environment, and can no longer meet the existing environmental protection requirements; the core sand core made of synthetic grease and raw sand, after the molten iron is injected into the cavity during the iron mold making process, Due to the characteristics of the core material, surface cracks affect the consistency of the size of the iron mold cavity. After molding, the sand layer is inconsistent during use, resulting in casting defects on the casting surface; surface cracks cause casting burrs of different sizes to form on the inner wall of the cavity, and the mold Poor cavity surface quality, cumbersome to clean

[0004] When the iron mold is made, the plane forming method on the iron mold uses ordinary molding sand, which is formed by beating and compacting. The sand layer made by this method has low strength. When the molten iron expands with heat and contracts with cold, it forms a large area of ​​depression on the upper plane. It needs to be machined into a plane to meet the requirements of use. It is time-consuming and labor-intensive, and the processing cost is high. It has not been improved for a long time.