Self-locking type sand core standard core tool and application method thereof

Abstract

The invention relates to a fixing tool between a sand mold and a sand core for casting, and provides a self-locking type sand core standard core tool. The self-locking type sand core standard core tool comprises a standard core rod segment pre-embedded in a sand core and a standard core cap segment embedded in a corresponding sand mold. The standard core rod segment and the standard core cap segment are simultaneously pre-embedded in the sand mold to generate self-locking, so that the defect that a standard core adhesive is heated at high temperature to evaporate gas so as to easily cause choke is overcome; casting dimension deviation is easily caused by insufficient standard core strength; a screw channel is reserved to realize the firm fixation of the sand core and prevent sand core fromshifting when a box is closed, so that pouring choke is prevented, the casting dimension is ensured, and the defects of sand clamping and leak-out due to the standard core are prevented; the steps ofreserving a standard core through hole in the sand core and filling sand at a later stage are avoided, and the problem that loose sand falls into a mold cavity due to the sand core standard core is fundamentally solved; and the sand core drift is reduced by the firm connection between the standard core cap segment and the standard core rod segment.

Description

technical field [0001] The invention relates to a core assembly tool for casting, in particular to a tool for fixing between a sand mold and a sand core for casting. Background technique [0002] In the process of casting production, box closing is a particularly critical step. In the process of box closing, the assembly between the cavity and the sand core is the core step, but for the product, the inner cavity core and the upper mold cannot be in contact. , if it cannot be fixed properly, floating cores will be generated due to the floating of molten iron during the pouring process, which will easily cause deviations in the contour size of the casting and problems such as choking and fire, which will be scrapped. [0003] The existing fixing methods for this type of core include: 1) For cores with a small weight and sufficient contact surface of the core head, use an adhesive to bond and fix the sand core and the sand mold at the core head; 2) For slightly In addition to ...

AI Technical Summary

Problems solved by technology

[0005] The invention overcomes the problems that the standard core adhesive is heated and gasses at high temperature, which is easy to cause choking; the core strength is not enough to easily cause casting size deviation; the reserved screw channel is easy to produce sand inclusions and runaway problems, and provides a sand mold and sand core The tooling used for fixing between the sand cores can realize the firm fixation of the sand cores and prevent the sand cores from shifting when the box is closed, so as to prevent pouring from choking fire, ensure the size of the castings, and prevent sand inclusions and fire escape defects caused by standard cores.

Images