Method for using maximized core iron in casting parts

Abstract

The invention relates to a method of using a maximum core iron in casting a casting. The method comprises the following steps: a. the maximum size of the core iron is made into a size less than that of a core cavity opening of the casting to be cast; b. the thickness of a sand-faced layer is made to be a thickness not less than 2.5-3mm. The method for using the maximum core iron in casting the casting can eliminate shrinkage pores and shrinkage around a sand core, improve the density of the periphery of the core and prevent leakage from the casting.

Description

technical field [0001] The invention belongs to a casting method, and in particular relates to a method for adopting a maximum iron core in a casting casting. Background technique [0002] At present, except for a few casting jobs such as lost foam casting, investment casting, and ceramic casting, most casting processes are inseparable from sand cores. In reality, core iron is generally not used in core making, and even iron wires and nails are simply used as core iron when used. However, for larger sand cores, specially cast iron cores are used, and the cross-sectional area is small, which will cause damage to the sand core. The core breaks or collapses. The sand core is wrapped in molten metal (casting) after pouring, and its surroundings are often hot spots, so shrinkage pores and shrinkage defects are often formed around the sand core, and leakage will occur in the casting. Contents of the invention [0003] The technical problem to be solved by the present invention...

AI Technical Summary

Problems solved by technology

In reality, core iron is generally not used in core making, and even iron wires and nails are simply used as core iron when used. However, for larger sand cores, specially cast iron cores are used, and the cross-sectional area is small, which will cause damage to the sand core. Core fracture or collapse