A connection method of anti-inclusion sprue cup for large castings

Abstract

The invention discloses a connection method of an anti-inclusion pouring cup for a large casting. The process of the connection method of the anti-inclusion pouring cup for the large casting comprisesthe following steps that the wax patterns of the pouring cup and a pouring cup step segment are manufactured (please see attached drawings 1 and 2); the height e of the pouring cup step segment ranges from 10 mm to 20 mm, the pouring cup and the pouring cup step segment are connected, a shell is manufactured, and when coating of 4-5 layers of the shell is completed, a steel wire is wound (pleasesee the attached drawing 3); a pouring cup cooperation segment is manufactured according to the attached drawing 4, the size phi A is the same as the size phi a in the attached drawing 2, the size B is slightly smaller than b, and the size E is the same as e; a wax part of the pouring cup cooperation segment and a wax part of the casting are connected, and a shell is manufacture; and before pouring, the pouring cup and the casting shell are connected through refractory mortar. According to the connection method of the anti-inclusion pouring cup for the large casting, increase of inclusions inthe casting in the pouring cup connection process and the high-temperature pouring process can be completely avoided, the mounting and operation difficulty can be reduced, metal materials can be separated well, and the metallurgical quality of the casting can be improved.

Description

technical field [0001] The invention relates to the technical field of structural design and application of casting shells, and in particular provides a connection method for an anti-inclusion sprue cup for large castings. Background technique [0002] In the manufacturing process of large ceramic shells, due to the combination and shell quality problems, inclusions will be generated in the casting process, which will affect the metallurgical quality of the castings. Generally, due to the large size of large castings, a large amount of pouring molten steel is required, and a fast pouring speed is required. Usually, the height of the sprue cup has reached or exceeded the height of the entire mold shell. When the wax parts are assembled, the sprue cup is directly placed Combining it with the casting body will cause the casting to be doubled in height. Therefore, for the manufacture of large casting shells, the sprue cup is generally installed before pouring. The installation ...

AI Technical Summary

Problems solved by technology

[0004] Butt jointing or plugging of the sprue cup has a big problem in the recovery of metal materials near the sprue cup after pouring. After the casting is poured, the metal material at the junction of the sprue cup is connected with the refractory material, which is difficult to separate. As a result, dozens of kilograms of metal materials cannot be recycled, resulting in waste of metal materials

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