Metal mould containing sandmold insert and application thereof in tilted casting

Abstract

The invention discloses a metal mould containing a sandmold insert and an application thereof in tilted casting. The metal mould containing the sandmold insert comprises a metal mould cavity, a casting system, a clamping mechanism, the sandmold insert, metal mould air vents and an insert supporting seat; the forming surface of the sandmold insert is in accordance with the outline of the outer surface of a raw casting, the mould contact surface of the sandmold insert is in accordance with the outline of the insert supporting seat formed by inward processing of the sandmold insert; the metal mould air vents, which are evenly distributed along the contact surface of the sandmold insert and a metal upper mould, are contacted with the sandmold insert and communicated with outer atmosphere, theaperture thereof is 5mm-20mm, and the center distance between vents is 15mm-30mm. In the invention, the sandmold insert is utilized to replace a core puller of the metal mould, thereby simplifying mould design and overcoming the problem of difficult exhaustion of the metal mould. The casting utilizing the invention has compact texture and high yield, and has particularly notable advantages in theproduction of cylinder covers, chassis, shells and the like used for automobiles.

Description

technical field [0001] The invention belongs to the technical field of casting, and in particular relates to a metal mold containing sand mold inserts and its application in tilting casting. It is mainly suitable for casting all kinds of auto parts with complex structures and large sizes, such as cylinder heads, discs, shells, etc. Background technique [0002] Traditional sand mold gravity casting has disadvantages such as low production efficiency, difficult control of process conditions, low casting quality and poor mechanical properties in the production of auto parts cylinder heads, discs, shells and other products with complex structures and high quality requirements. , and gradually eliminated. The metal mold gravity casting process can produce castings with dense structure and good mechanical properties, but it is difficult to design the pouring scheme when producing large and complex castings: if the bottom injection type is used, the flow of molten metal will be t...

AI Technical Summary

Problems solved by technology

However, the following two problems are difficult to solve in the production of automotive cylinder heads, discs, and shell parts: first, the structure of automotive cylinder heads, discs, and shell parts is complex, and there are often cavities and concave corners. The use of the core-pulling mechanism increases the difficulty of mold design, and also increases the load of the tilting machine, significantly increasing energy consumption and cost, which greatly restricts the ability to produce this type of parts; second, the mold is closed during the metal mold tilting casting process. The air permeability is poor, and the gas wrapped by the molten metal during the turning process is difficult to discharge out of the mold cavity, resulting in pore defects, resulting in a high casting rejection rate and difficult to improve the quality level

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