Piston for vehicle engine and method for manufacturing the same

A piston manufacturing device, comprising:

• a partially opened heating zone;
• a heater for providing heat into the heating zone;
• and
• a moving unit which is configured to move in one direction in the heating zone
• wherein the heating zone comprises:
• a first heating zone to heat a piston assembly comprising a first piston part, a bonding member and a second piston part formed at room temperature to a first temperature from the room temperature, the first temperature being lower than the melting temperature of the bonding member, and a second heating zone to heat the piston assembly heated to the first temperature in the first heating zone to a second temperature higher than the melting temperature of the bonding member, wherein the piston manufacturing device is configured such that, in a piston diffusion brazing step, the piston assembly is heated while being moved at a predetermined speed through the heating zone in the one direction by the moving unit, wherein the piston manufacturing device further comprises a cooling zone disposed at a rear side of the heating zone and having first and second cooling zones communicating with each other, wherein the first cooling zone has an internal temperature that decreases to a cooling temperature from the first temperature higher than the melting temperature of the bonding member, and the second cooling zone communicates with the first cooling zone and has an internal temperature maintained at the cooling temperature.