Silica gel four-cylinder ejection device

Abstract

The invention discloses a silica gel four-cylinder ejection device which comprises a pushing oil cylinder, a discharging cylinder and a storage cylinder, wherein an exhaust valve is arranged at the upper part of the storage cylinder; an ejection device body is arranged on the right side of the storage cylinder; four ejection oil cylinders are mounted in the ejection device body; a gun barrel is arranged in the center of the ejection device body; a cooling water sleeve is arranged on the external diameter of the gun barrel; the right end of the storage cylinder is connected with the gun barrel; a screw rod is mounted in the gun barrel; a feeding motor is mounted at the top end of the screw rod; the screw rod is connected with the ejection device body through a feeding motor base; a non-return ring is arranged at the lower end of the screw rod; a pre-ejection cavity is formed below the non-return ring; a nozzle is arranged below the pre-ejection cavity; and two cooling water holes are formed in the lower part of the nozzle. The silica gel four-cylinder ejection device has the following beneficial effects: as four ejection oil cylinders are mounted, the silica gel four-cylinder ejection device is large in ejection pressure, and improved in stability and balance; in addition, the silica gel ejection screw rod is vertically mounted, and the pre-ejection cavity is near to a die, so that the silica gel duct length is decreased, the pressure loss of ejected silica gel to the die is small, and the silica gel four-cylinder ejection device can better control ejection of raw materials.

Description

technical field [0001] The invention relates to the technical field of injection devices, in particular to a four-cylinder injection device for silica gel. Background technique [0002] At present, the ordinary injection machines on the market are mostly single-cylinder injection or double-cylinder injection. Due to the poor fluidity of solid silica gel, the required injection pressure is relatively high. Generally, the maximum injection pressure should reach 1900-2000 kg per square centimeter, while single-cylinder or If the injection pressure of the double-cylinder injection cylinder is high enough to meet the requirements, the piston surface must be large, and the inner diameter of the cylinder is correspondingly large, and the stability and balance of the double-cylinder injection cylinder are poor. Because the single-cylinder injection cylinder can only be installed horizontally, the mold is from Glue is fed from the top, so the injection needs to be turned 90 degrees, ...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a four-cylinder injection device for silica gel, which can solve the problems of low injection pressure, large piston surface of the injection cylinder, and long rubber path caused by the single-cylinder injection cylinder can only be installed horizontally. Thereby reducing the pressure from the injection to the mold, resulting in an increase in the defective rate of the product and technical problems such as poor stability and balance of the double-cylinder injection cylinder

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