Mold assembly improved structure for greatly improving casting precision of light aluminum piston

Abstract

The invention relates to a mold assembly improved structure for greatly improving casting precision of a light aluminum piston. The mold assembly improved structure is applied to batch production of high-precision light aluminum pistons. The mold assembly improved structure comprises an outer mold, a pin hole mold, a sliding block mold and a core mold. The core mold comprises a piston core mold center piece. The piston core mold center piece is composed of a rectangular pyramid column and a supporting table connected with the rectangular pyramid column. The mold assembly improved structure ischaracterized in that a through groove is formed in a supporting rail along the center line, a straight rod is arranged at the bottom of the pin hole mold, the straight rod and the through groove areequal in width, and the straight rod extends into the through groove; and a T-shaped guide rail groove is formed in the upper portion of the pin hole mold, a T-shaped guide rail is arranged on the upper portion of the interior of a cavity of the outer mold, and the T-shaped guide rail is sleeved with the T-shaped guide rail groove. The pin hole mold is provided with a pin column hole lower pressing block. The rectangular pyramid column and the supporting table are connected in a fastened mode through a bolt with a tangential plane. An end face hole in the tail end of the bolt communicates witha side hole of the bolt, and a rectangular pyramid column deep hole is formed in the lower end face of the rectangular pyramid column. The mold assembly improved structure has the advantages that various abnormal abrasion of the pin hole mold is avoided, the bumping resistance is greatly improved, and the precision of the thickness of a radial casting involved in the sliding block mold in production is improved.

Description

technical field [0001] The invention relates to an improved structure of a mold assembly for greatly improving the casting precision of lightweight aluminum pistons, which is applied to mass production of high-precision lightweight aluminum pistons. Background technique [0002] The lightweight aluminum piston is an aluminum piston with three axial dimples on the outer side of the pin hole seat near the top. The lightweight aluminum piston is generally cylindrical, with a solid top and a cavity in the middle and lower parts. The pin hole traverses the middle part both side walls, and the hole on the side wall is the pin hole. The pin shaft is inserted into the pin holes on the two side walls, and the pin holes on the two side walls support the force exerted by the two ends of the pin shaft. Therefore, the side wall near the pin hole is designed to be thickened, and the thickened entity with the pin hole is also called the pin hole seat. The lightweight aluminum piston has...

AI Technical Summary

Problems solved by technology

[0016] The present invention will provide an improved mold assembly structure that greatly improves the casting precision of lightweight aluminum pistons. Its purpose is to improve the wear condition of the slider mold, solve the problems that the slider mold is not pushed in place, and the casting size is unstable (short stability period) ; It is to improve the manufacturing precision of the track groove of the center piece of the piston mandrel, thereby improving the casting precision of the piston skirt; the present invention will also improve the problem of poor water cooling of the mandrel at the same time, and produce a direct water cooling of the center piece of the piston mandrel. system, improving the casting accuracy determined by the water cooling effect as a whole

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