Cold pressing die for light automobile central channel sheet metal part

The cold pressing die comprises an upper pressing die body and a lower pressing die body, an outer groove is formed in the top face of the lower pressing die body, an ejection air cylinder is arranged on the inner wall of the outer groove, a piston rod of the ejection air cylinder faces upwards, and the top end of the ejection air cylinder is used for driving the sheet metal part to be separated from the lower pressing die body. A loosening assembly is arranged in the outer groove and comprises a reciprocating structure and two knocking rods with the ends connected. The edge of the cross section of the lower pressing die comprises a corner a and a corner b which are positioned on the top surface of the lower pressing die; the two knocking rods respectively face the corner a and the corner b; the reciprocating structure drives the knocking rod to slide back and forth, and the sliding direction of the knocking rod is the direction of the connecting line of the angle a and the angle b; the knocking rods are used