Feeding device for liquid silica-gel injection molding machine

The utility model discloses a feeding device for a liquid silica-gel injection molding machine, which comprises a material cylinder, a cylinder cover, a guide pillar and a hydraulic system, wherein the outer edge of the cylinder cover is provided with a rubber sealing ring, the guide pillar is fixed above the cylinder cover, the hydraulic system is connected with the guide pillar, and can control the cylinder cover to move on the inner edge of the material cylinder in a sealed up-down moving mode, the feeding device also comprises a ventilating assembly provided with a valve, the ventilating assembly is located above the cylinder cover and communicated with the inside of the material cylinder, and the valve controls the air intake and exhausting of the ventilating assembly. According to the utility model, the air intake and exhausting of silica-gel is more reliable and convenient, the loss of gel materials is reduced, and the production cost is lowered.