Process of strengthening 3d printed sand core for the casting of integral multi-way valve and sand core of integral hydraulic multi-way valve

A process of strengthening 3D printed sand core for the casting of integral hydraulic multi-way valve, comprising:

• creating a sand core model of a sand core to be 3D printed for an integral hydraulic multi-way valve in three-dimensional software, and then analyzing parts of the sand core to determine a weak part of the sand core;
• with respect to the weak part of the sand core, designing a pore channel with a pore diameter and a length in the sand core model according to a ratio L/D of a length to a diameter of the weak part of the sand core, and forming a reinforcing core bar according to the pore channel with the pore diameter and the length;
• and
• 3D printing the sand core according to the sand core model, placing the reinforcing core bar in the pore channel of the sand core, and achieving tight connection of the reinforcing core bar and the sand core in the hardening or curing process of the sand core, so that the strength of the sand core of the integral hydraulic multi-way valve is improved overall.