Negative-pressure air exhaust mold structure for low-pressure casting of sand core

The invention discloses a low-pressure casting sand core negative-pressure air exhaust mold structure, which belongs to the technical field of mold processing, and comprises a sand core, a sand core positioning block arranged on the side edge of the sand core, and a support upright post tightly attached to the outer side of the sand core positioning block, and a negative-pressure air exhaust pipe is arranged in the support upright post; one end part of the negative-pressure suction pipe penetrates through the sand core positioning block and is clung to the side wall of the sand core, and the other end of the negative-pressure suction pipe protrudes out of the supporting upright post and is connected with a negative-pressure suction pump. Sand gas of the sand core can be quickly and effectively discharged, generation of air holes is reduced, the qualification rate is increased, and the production cost is reduced. 本发明公开了一种低压铸造砂芯负压抽气模具结构，属于模具加工技术领域，本发明包括砂芯、设置在砂芯侧边的砂芯定位块、紧贴在砂芯定位块外侧设置的支撑立柱，支撑立柱内设置有负压抽气管，负压抽气管的一端端部