Patent ID: 11919067
Assignee: XIAMEN JJD MACHINERY CO., LTD
Field: Materials, metallurgy (Chemistry)
Classification: CPC B  Y | IPC B

Claim 0:
1. A sand core structure for die-casting, the sand core structure comprising a positioning-filling rod and a sand core body configured to encompass the positioning-filling rod, wherein the positioning-filling rod has a compressive strength greater than a compressive strength of the sand core body, and the positioning-filling rod is made of a breathable material;
wherein the positioning-filling rod is made of materials selected from a group consisting of solid breathable steel, hollow extruded sintered copper, and hollow breathable steel; and
wherein the positioning-filling rod has a protruding end configured to protrude from the sand core body, and the protruding end is configured to be an inflation inlet for heptafluoropropane gas.