Title:
LOW PRESSURE CASTING METHOD
Document Type and Number:
Japanese Patent JP2023054508
Kind Code:
A
Abstract:
To provide a low pressure casting method executing the safety operation and high response and high precision pressurization control of a pressurization control device feeding a pressurization gas into a sealed molten metal holding furnace by the optimization of a control parameter value set based on a pressure difference.SOLUTION: A low pressure casting method operates the spool position of a servo valve based on a previously set pressurization control pattern, and adjusts pressurization gas pressure in a sealed molten metal holding furnace so as to injection-charge a molten metal into a mold cavity, The low pressure casting method comprises: obtaining a control parameter correction value of the pressurization control pattern based on a pressure difference between the pressurization gas pressure and the target pressure of the pressurization control pattern; and further, adjusting the control parameter correction value based on a positional difference between the spool position of the servo valve and a target position of the pressurization control pattern.SELECTED DRAWING: Figure 5
Inventors:
TAJIMA ATSUYA
Application Number:
JP2021163401A
Publication Date:
April 14, 2023
Filing Date:
October 04, 2021
Export Citation:
Assignee:
UBE MACHINERY CORP LTD
International Classes:
B22D18/08; B22D18/04