# US 2009/0255643 A1 · Cooling system for low-pressure casting mold > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2009/0255643 A1 - Document ID: US20090255643A1 - Status: Published application - Kind: A1 - Application number: 12/276,937 - Filed: 2008-11-24 - Published: 2009-10-15 - Earliest claimed: 2008-04-10 - Assignees: Hyundai Motor Company - Inventors: Kyung Sik Kweon - Web page: https://patentgrep.com/patent/US20090255643A1 ## CPC - B22D 18/04: Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould - B22D 30/00: Cooling castings, not restricted to casting processes covered by a single main group (accessories for cooling cast stock in continuous casting of metals B22D11/124; controlling or regulating processes or operations for cooling cast stock or mould in continuous casting of metals B22D11/22; chill casting B22D15/00) - B22D: CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES (shaping of plastics or substances in a plastic state B29C; metallurgical processing, selection of substances to be added to metal C21, C22) ## Abstract The present invention provides a cooling system for a low-pressure casting mold, in which a sprue is located at a side surface of a cylinder head to ensure a sufficient distance between a combustion chamber and the sprue so that a combustion chamber cooling system combined with water cooling and air cooling is provided in a lower mold, thus reducing cycle time. Moreover, the cooling system for a low-pressure casting mold in accordance with the present invention improves mechanical properties of a material used by reducing DAS and porosity. ## Claims ### Claim 1 A cooling system for a low-pressure casting mold including an upper mold, a side mold having a cavity in the middle thereof, and a lower mold such that molten metal is filled and solidified in the cavity to mold a cylinder head, the cooling system comprising: a sprue formed on a side surface of the cylinder head; a first cooling means for cooling the mold by supplying a cooling fluid to the upper metal; a second cooling means for cooling the mold by supplying a cooling fluid to a side mold; and a third cooling means for cooling the mold by supplying a cooling fluid to a lower mold. ### Claim 2 (depends on 1) The cooling system of claim 1, wherein the first cooling means comprises: a housing including a cooling water inlet and a cooling water outlet formed on one side surface thereof, in which a lower portion is attached to an upper surface of the upper mold; a plurality of spark plug pins connected to the cooling water inlet and the cooling water outlet and provided parallel to the vertically downward direction in the inside of the housing; and a cooling line introduced in the horizontal direction and discharged in the opposite direction with the spark plug pins interposed therebetween, wherein cooling water introduced through an inlet of each of the spark plug pins cools the upper mold and is then discharged through the cooling water outlet. ### Claim 3 (depends on 2) The cooling system of claim 2, wherein the second cooling means comprises: a gas inlet and a gas outlet formed in the side mold to discharge gas from the mold; a cooling portion formed between the gas inlet and the gas outlet and receiving a cooling fluid from the outside; a gas suction portion divided by the cooling portion and a partition and connected to the gas inlet so as to suck gas introduced through the gas inlet; a cooling fluid supply path connected to the cooling portion to supply the cooling fluid; and a cooling fluid discharge pipe penetrating from the cooling portion to the gas suction portion and extending to an outlet to discharge the cooling fluid, wherein exhaust gas in the mold is introduced to the gas suction portion through the gas inlet, cooled by the cooling fluid discharge pipe, and then discharged through a gap between the outlet and the cooling fluid discharge pipe. ### Claim 4 (depends on 3) The cooling system of claim 3, wherein the third cooling means comprises: a cooling fluid supply pipe and a cooling fluid discharge pipe provided parallel to the vertical direction from the outside to the inside of the lower mold; a three-way valve, provided at an inlet portion of the cooling fluid supply pipe and including a water injection hole formed on an upper portion thereof in the upward direction and a cooling air injection hole formed on a side surface thereof in the horizontal direction; and a discharge pipe connecting the cooling fluid discharge pipe in the horizontal direction, wherein cooling water supplied through the water injection hole and cooling air supplied through the cooling air injection hole move to the cooling fluid supply pipe to cool the lower mold and are then discharged through the cooling fluid discharge pipe and the discharge pipe. ### Claim 5 (depends on 4) The cooling system of claim 4, further comprising: a housing including a cooling water inlet pipe and a cooling water outlet pipe formed on one side surface thereof and attached to an upper surface of the upper mold; and a plug pin for cooling the inside of the lower mold protruding in the upward direction from the housing, wherein the cooling water is introduced through the cooling water inlet pipe to cool the lower mold and is then discharged through the cooling water discharge pipe. ### Claim 6 (depends on 1, 2, 3) The cooling system of any one of claims 1 to 3, wherein the cooling fluid is cooling water or cooling air. ### Claim 7 (depends on 1) The cooling system of claim 1, further comprising: a connection pipe connected to the lower mold and including a sprue formed therein, and an electric heater in which a coil is inserted as a heating element and surrounding the outer circumference of the connection pipe, wherein the connection pipe is kept warm by the electric heater by receiving electric power from the outside. ### Claim 8 A cooling system for a low-pressure casting mold including an upper mold, a side mold having a cavity in the middle thereof, and a lower mold such that molten metal is filled and solidified in the cavity to mold a cylinder head, the cooling system comprising: a sprue; and a first cooling means for cooling the mold. ### Claim 9 (depends on 8) The cooling system for a low-pressure casting mold of claim 8, wherein the sprue is formed on a side surface of the cylinder head and the first cooling means for cooling the mold supplies a cooling fluid to the upper metal. ### Claim 10 (depends on 8) The cooling system for a low-pressure casting mold of claim 8, further comprising a second cooling means for cooling the mold. ### Claim 11 (depends on 10) The cooling system of claim 10, wherein the second cooling means for cooling the mold supplies a cooling fluid to a side mold. ### Claim 12 (depends on 8) The cooling system for a low-pressure casting mold of claim 8, further comprising a third cooling means for cooling the mold. ### Claim 13 (depends on 12) The cooling system of claim 12, wherein the third cooling means for cooling the mold supplies a cooling fluid to a lower mold. ### Claim 14 (depends on 1) A motor vehicle comprising the cooling system for a low-pressure casting mold of claim 1. ### Claim 15 (depends on 8) A motor vehicle comprising the cooling system for a low-pressure casting mold of claim 8.