Sand box for manufacturing end cover casting

Abstract

The invention discloses a sand box for manufacturing end cap castings, which is characterized in that it includes an upper sand box and a lower sand box, the upper sand box is provided with upper casting sand, the lower sand box is provided with lower casting sand, and the upper sand box is provided with lower casting sand. A first mold core is arranged between the lower casting sand, a second mold core is arranged on the side of the first mold core, and a mold is arranged between the upper casting sand, the lower casting sand, the first mold core and the second mold core. Cavities; there are two mold cavities, a secondary flow channel located on the upper surface of the lower casting sand is connected between the mold cavities, and a main flow channel perpendicular to it is connected in the middle of the secondary flow channel, and the main flow channel is arranged in the upper casting sand; The cavity is symmetrical about the main flow channel; two impurity wells are arranged at the lower end of the secondary flow channel, and the impurity wells are symmetrical about the main flow channel. The invention can precipitate impurities in the liquid metal or solidified metal particles in the casting, so the parts obtained by using the casting of the invention have less impurity content, smooth surface and guaranteed structural strength. In addition, the invention can also prevent sand inclusion defects in castings.

Description

technical field [0001] The invention relates to a casting mold for metal parts, especially a sand box for manufacturing end cap castings. Background technique [0002] Casting is a process in which solid metal is melted into a liquid and poured into a pre-processed cavity, and then cooled and solidified. Casting can be divided into two categories: sand casting and special casting. [0003] Sand casting is the most common casting method. It mainly uses sand as the material of the casting mold. The casting sand is solidified to process the cavity and core, and the liquid metal is formed in the cavity. Because the molten liquid metal contains certain impurities or the casting sand on the flow channel wall is separated and mixed into it by the impact of the liquid metal, the subsequent metal castings are affected by these impurities and the structural strength is reduced. During the casting process, the liquid metal is not cooled uniformly in the flow channel, and part of the ...

AI Technical Summary

Problems solved by technology

In more severe cases, these particles can clog the cavity and cause underrunning where the casting does not acquire its full shape

Therefore, the parts obtained by the existing sand casting are prone to defects such as impurities and uneven surfaces, which have adverse effects on the shape and structural strength of the parts

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