Patent ID: 8360135
Filing Date: 2013-01-29
Classification: B22C,B22D,B29C

Abstract:
1. A method of operating a mold cooling device for cooling a mold by causing cooling water to flow through a cooling passageway provided in the mold, the mold cooling device including: a water tank for storing the cooling water; a supply-side pipe line connecting the water tank to an inlet of the cooling passageway of the mold; a return-side pipe line connecting an outlet of the cooling passageway of the mold to the water tank; a suction pump disposed in the return-side pipe line; and a bypass pipe line having a first end connected to the suction pump or connected to and branched from the return-side pipe line at a location upstream of the suction pump, and a second end connected to the water tank, wherein the suction pump includes a suction chamber in which a negative pressure is generated by gear rotation, and a swirling chamber that generates a swirling flow of the cooling water discharged from the suction chamber, the method comprising: sucking the cooling water in the water tank by the negative pressure generated by the suction pump, thereby causing the cooling water to flow from the supply-side pipe line to the return-side pipe line via the cooling passageway of the mold, and concurrently causing the cooling water to flow to the suction pump via the bypass pipe line.