Nut plastic foam model, mold for making plastic foam model, and nut lost foam casting process

Abstract

The invention discloses a nut plastic foam model which comprises a plurality of nut plastic foam model units and a sprue gate, wherein the nut plastic foam model units comprise a nut lost foam pattern, a primary casting gate and secondary casting gates arranged on two sides of the primary casting gate; the sprue gate is communicated with the primary casting gate; the primary casting gate is communicated with the secondary casting gates; the secondary casting gates are connected with the nut lost foam pattern; an integrally molded threaded hole is formed in the nut lost foam pattern. The invention further discloses a mold for making the plastic foam model. The mold comprises an upper mold base and a lower mold base, wherein cavities for making the nut plastic foam model units are formed inthe upper mold base and the lower mold base; the cavities comprise a nut cavity for making the nut lost foam pattern, a primary casting gate cavity for making the primary casting gate, and secondary casting gate cavities for making the secondary casting gates. The invention further discloses a lost foam casting process for making nuts based on the plastic foam model. By utilizing the advantage that the lost foam module mold has full degrees of freedom, small nuts are wholly modeled in strings, and the technological yield is improved.

Description

technical field [0001] The invention belongs to the technical field of lost foam casting, and in particular relates to a foam plastic model used for lost foam casting nuts, a mold for manufacturing the nut foam model and a nut lost foam casting process. The nut foam model is used in lost foam casting Intermediate die for the manufacture of nuts for anchor steel connections. Background technique [0002] Usually when making anchor rod steel nuts, the nut blanks are first cast with clay sand, and then machined. The existing manufacturing methods lead to high processing costs of such standard parts, and casting defects are prone to appear on the processed surface. At present, another way to manufacture nuts is to use precision casting for one-time molding. The nuts manufactured by this method are prone to finger gaps and flashes on the internal threads, which will affect normal use. Contents of the invention [0003] The purpose of the present invention is to provide a foam...

AI Technical Summary

Problems solved by technology

The existing manufacturing method leads to high processing costs of such standard parts, and casting defects are prone to appear on the processed surface

At present, another way to manufacture nuts is to use precision casting for one-time molding. The nuts manufactured by this method are prone to finger seams and flashes on the internal threads, which will affect normal use.

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