Miniature liquid silica gel cold runner needle valve structure

The utility model discloses a miniature liquid silica gel cold runner needle valve structure which comprises a miniature die, a middle die block, an upper die and a lower die which are integrally installed from top to bottom, a first installation groove is formed in the surface of the miniature die, an air cylinder is installed in the first installation groove, a valve needle is installed on the air cylinder, a channel for the valve needle to pass through is formed in the middle die block, and the valve needle is installed in the channel. A second mounting groove is formed in the surface of the lower die, a cold water nozzle is mounted in the second mounting groove, a flow guide hole is formed in the middle of the cold water nozzle, the upper end of the flow guide hole is communicated with the channel, and the lower end of the flow guide hole is communicated with a die cavity between the upper die and the lower die; and cold runners communicated with the flow guide holes are formed in the micro mold and the m