Quartered core device and its application method

Abstract

The present invention relates to metal casting technology, and is especially one kind of quartering mold core unit for casting aluminum piston and its application method. The quartering mold core unit includes one pair of side cores, one pair of middle cores, one crow bar, one hinge flap, one cross beam, one hydraulic cylinder and other parts. It features the side core pair and the middle core pair combined into one integral quartering mold core, and the cross beam, the curved cross beam, the penta articulation structure, etc. below the quartering mold core. Compared with available technology, the present invention has simple operation structure, casting machine top height smaller than 900 mm, reasonable and balanced core force distribution, less core deformation, high casting quality and long core life.

Description

technical field [0001] The invention relates to the field of metal casting, in particular to a quarter core device for aluminum piston casting and an application method thereof. Background technique [0002] In the existing piston casting technology, usually five cores are used to form the piston cavity mold, as shown in Figures 14, 15, and 16, the cast aluminum piston 99 uses a five-point core, including core I 93, Core II 94, center core I 95, center core II 96, and center core 97. The purpose of this structure is only to give up space for removing the core, but it directly leads to two disadvantages. One is the complexity of the core removing mechanism; The second is that the cantilever beam force system L is formed between the central moment F1 of the waxy mold force of the core and the ejection moment F2. Under its action, the core will quickly undergo fork deformation, which seriously affects the surface quality of the casting inner cavity and the core. life. Conten...

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Problems solved by technology

[0002] In the existing piston casting technology, usually five cores are used to form the piston cavity mold, as shown in Figures 14, 15, and 16, the cast aluminum piston 99 uses a five-point core, including core I 93, Core II 94, center core I 95, center core II 96, and center core 97. The purpose of this structure is only to give up space for removing the core, but it directly leads to two disadvantages. One is the complexity of the core removing mechanism; The second is that the cantilever beam force system L is formed between the central moment F1 of the waxy mold force of the core and the ejection moment F2. Under its action, the core will quickly undergo fork deformation, which seriously affects the surface quality of the casting inner cavity and the core. life

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