Method for controlling die temperature and for pacing the casting cycle in a metal die casting operation

Claim 1

In a metal die casting operation, a method for controlling the die temperature and for pacing the casting cycle of the die, which comprises the steps of: positioning a first temperature sensor in the highest operating temperature zone of one side of a die assembly and a second temperature sensor in the lowest operating temperature zone of an opposing side of said die assembly, said temperature sensors being associated with an indicating controller, the controller including signal means operatively connected to said first and second temperature sensors, the signal means providing a visible signal in response to the temperature indicated by at least one of said temperature sensors, heating the die assembly to a predetermined temperature range operable for casting a metal desired to be die cast, injecting the metal to be die cast into said die assembly to commence the casting cycle, while passing a cooling liquid through said die assembly, adjusting the flow of said cooling liquid into said die assembly until the temperature differential between the first and second temperature sensors is within 10* F. of a median temperature point within said predetermined operable temperature range, setting on the indicating controller a low limit casting temperature and a high limit casting temperature, as determined by the temperature differential between said first and second temperature sensors, maintaining the die casting cycle at an optimum pace to hold the temperature of the die casting assembly between the low limit and high limit casting temperature, as determined by visually observing the signal produced by the signal means of said indicating controller.