Cross beam type salt-core pressing die and salt core production method adopting pressing die

Abstract

The invention discloses a cross beam type salt-core pressing die which comprises an upper pressing die, a lower pressing die outer ring, a lower pressing die inner ring and movable blocks, wherein a first groove is formed in the top end of the outer wall of the lower pressing die inner ring; a second groove matched with the first groove is formed in the top end of the inner wall of the lower pressing die outer ring; the first groove and the second groove form a first annular groove; a second annular groove, corresponding to the opening of the first annular groove, is formed in the bottom surface of the upper pressing die and communicated with the first annular groove; the second annular groove and the first annular groove are in butt joint to form a salt-core die cavity I; the cavity volume ratio of the salt-core die cavity I is 1: (1+0.7); a third groove is formed in the center of the lower pressing die inner ring; a pressing block corresponding to the third groove is arranged on the bottom surface of the upper pressing die; the third groove and the pressing block are in butt joint to form a salt-core die cavity II; the cavity volume ratio of the salt-core die cavity II is 1: (1+0.8); the movable blocks are embedded around the third groove and moves relatively to the lower pressing die inner ring. The invention further provides a method for manufacturing a salt core by utilizing the cross beam type salt-core pressing die.

Description

technical field [0001] The invention relates to a salt core pressing mold for an aluminum piston and a manufacturing process thereof, in particular to a beam type salt core pressing mold and a method for manufacturing the salt core. Background technique [0002] As people pay more and more attention to environmental issues, the requirements for the performance of internal combustion engines are also increasing: high power, low fuel consumption, low noise, low emissions, etc., and the piston is an important core component of the internal combustion engine. Particularly important. In order to reduce the temperature of the piston head and improve the reliability of the piston under high-temperature reciprocating working conditions, some high-power and large-bore pistons are planned to adopt an internal cooling channel with an oil-spraying structure on the top of the connecting rod, so that the oil can increase the oil during the reciprocating work of the piston. The cooling ar...

AI Technical Summary

Problems solved by technology

However, the internal cooling salt core structure of this kind of beam structure is relatively complicated, and it is impossible to produce it with traditional manufacturing techniques.

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