Casting method of hundred-ton ductile cast iron template casting for two-plate injection molding machine

Abstract

The invention discloses a casting method of a hundred-ton ductile cast iron template casting for a two-plate injection molding machine. The casting method comprises the steps of mold making, casting system making, sand mold making and molding by casting, thus obtaining the casting, wherein the reverse side of a mold installing surface is designed at the lower part of a casting position; an inner runner hole is formed on the reverse side of the mold installing surface; in the casting process, liquid iron enters lower horizontal runners via sprues, then enters type A filters via the lower horizontal runners and is subjected to inoculation and filtration purification treatment inside the type A filters; then the liquid iron which enters type B filters via upper horizontal runners and is subjected to purification and filtration again enters a casting mold cavity via the inner runner hole; the final strength of a sand mold is 1.3-1.4MPa, and the final strength of a sand core is 0.9-1.0MPa; the casting temperature is 1290-1310 DEG C, and the casting time is 85-100 seconds. The casting method has the advantages that the casting defects such as graphite degeneration, shrinkage cavity, shrinkage porosity, sand inclusion and the like are not easy to occur, thus improving mechanical properties.

Description

technical field [0001] The invention belongs to the technical field of large-scale (hundred-ton and above) casting castings, and in particular relates to a casting method for a 100-ton nodular cast iron template casting for a two-plate injection molding machine. Background technique [0002] Modern injection molding machines are developing in the direction of large scale, precision, stability and reliability, and high automation. New technologies, new processes, and new materials are widely used in the design and manufacture of injection molding equipment; among them, template castings are key mechanical components of injection molding machines. The weight accounts for about 70% of the weight of the entire injection molding machine. At the same time, the template casting is the main part to ensure the reliable closing of the mold and realize the opening and closing of the mold. Its working state largely determines the quality of the plastic part. [0003] Although my country...

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the above-mentioned deficiencies in the prior art, and provides a casting method for a 100-ton nodular cast iron formwork casting for a two-plate injection molding machine that is not prone to graphite distortion, shrinkage cavity, shrinkage porosity, sand inclusion and other casting defects, thereby improving the mechanical properties

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