Method for gravity casting of aluminum liquid through segmented mold filling and casting system

Abstract

The invention discloses a method for gravity casting of aluminum liquid through segmented mold filling and a casting system. The casting system is characterized in that a mode cavity is divided into several segments along the length direction of the product, an independent ingate is arranged at the tail end of each segment; and a rinserbob is arranged at the intersecting position of each ingate and a main runner. The aluminum liquid is casted from a cast gate, is accumulated at the segment of the lowest end of the main runner, then introduced in the mode cavity in order through the ingate from down to up, and fed at the aluminum liquid inlet; until the aluminum liquid is completely filled in the rinserbob at the top of the mode cavity. The casting system effectively solves the mold filling problems of large shape, complex structure, thin wall thickness, long length of the pipe product due to a single cast gate in prior art, stable mold filling of aluminum liquid can be ensured, progressive solidification can be realized, so that generation probability of hole shrinkage and air hole can be greatly reduced. According to the invention, casting quality is effectively increased, production cost is reduced, equipment structure is simple, operation is convenient, and the industrial popularization and application are easy to realize.

Description

technical field [0001] The invention relates to a mold filling method for molten aluminum in gravity casting, and belongs to the technical field of casting, in particular to a method for filling molten aluminum in gravity casting in sections and a pouring system thereof. Background technique [0002] With the development of China's gravity casting technology, up to the present stage, domestic gravity casting technology has accumulated a certain foundation and production experience, good technical support and accumulated production experience have made my country's gravity casting products gradually accepted by foreign famous brands of automobiles. It is recognized by the manufacturers, and gradually shifts the manufacturing center of gravity casting products to China. The demand for production is the driving force to promote technological improvement and renewal. Therefore, my country's gravity casting technology needs to be continuously explored and improved in practice. Th...

AI Technical Summary

Problems solved by technology

[0003] Gravity casting is a traditional casting method. Traditional domestic gravity casting liquid aluminum filling methods generally use bottom injection, top injection, middle injection, etc. These pouring methods are usually a single gate, that is, only one place enters the water. For large-sized products, there will be many problems in long-length tube products, such as: long filling path, fast cooling of molten aluminum, resulting in dissatisfaction with filling, long feeding channel, insufficient feeding, shrinkage cavity, and turbulent flow. Bubbles, etc., the product scrap rate is high, resulting in high manufacturing costs, thus losing market competitiveness

Although the structure of single-gate pouring equipment is relatively simple, the casting defects caused by it are very prominent.

In order to overcome the above defects, it is an urgent need for gravity casting enterprises to develop a pouring method and equipment that can be applied to the filling of pipe products with large size, complex structure, thin wall thickness or long length.

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