A die casting system comprises a machine of the balanced, dual movement type wherein the part is cast and trimmed without any lateral movement. Both halves of the molds or dies are moved equal distances to and from the part plane. The machine incorporates a system of metal injection on the mold parting line with a runner-drain provision; provision for supporting the part at a plurality of points after the die opening; hydraulic fluid volumetric flow reduction; various nozzle configuration options and a heat transfer system for the dies. In addition, a part trimming machine is disclosed together with a cable transfer for moving the part from the casting machine to the trimming machine.
This application is a continuation of application Ser. No. 361,710, filed Mar. 25, 1982, now abandoned, which, in turn, is a division of application Ser. No. 191,624, filed Sept. 29, 1980, now U.S. Pat. No. 4,356,858, which, in turn, is a division of application Ser. No. 929,148, filed July 31, 1978, now U.S. Pat. No. 4,248,289.
Priority Data
Dec 01, 1977 [GB] 501179/77 Jun 12, 1978 [CA] 305228
A method and system for controlling the temperature of a fluid cooled high temperature injection mold having fluid channels formed therein. A high temperature injection mold has an operating temperature above the boiling point of water. A flow of either elevated pressure or low pressure cooling water is passed through the fluid channels in the high temperature injection mold for a limited duration during the molding cycle to thereby reduce the temperature of the injection mold to a desired level. Elevated pressure cooling water is elevated to a pressure level such that the cooling water will remain in a liquid state while passing through the fluid channels. Low pressure cooling water is at a pressure level such that the cooling water enters the fluid channels in a liquid state and transitions to a vapor state within the fluid channels. The cooling water may be provided to the high temperature injection mold in a closed loop system, wherein cooling water which is treated to remove contaminants therefrom is stored in a cooling water supply tank. Used high temperature cooling water emerging from the fluid channels of the high temperature injection mold is preferably mixed with lower temperature cooling water from the cooling water supply tank before being returned to the cooling water supply tank. Elevated or low pressure cooling water may be passed through some fluid channels in an injection mold while high temperature heating water is passed simultaneously through other fluid channels in the same mold.
A method and apparatus for controlling the temperature of an injection mold passes pressurized air contained in an air supply tube through an orifice into an exhaust channel, wherein the pressure of the air in the exhaust channel is lower than the pressure of the air in the air supply tube. As the pressurized air is released through the orifice, cooling is produced that can be applied to a portion of an injection mold where cooling is desired, in order to control the temperature of that portion of the injection mold.
