Adhesive dispensing device

Abstract

An adhesive dispensing device comprises a support, a slide rail arranged on the support, a motor, a lead screw driven by the motor, a slide block arranged on the slide rail and screwed with the lead screw, a material pushing piston fixed on the slide block, a charging barrel arranged on the support and a dispenser connected with the charging barrel. A cavity for containing an adhesive solution and a discharging orifice communicating with the cavity are formed inside the charging barrel; and one end of the material pushing piston is inside the cavity to effect on the adhesive solution in the charging barrel. The dispenser comprises a needle-valve and a syringe needle arranged on one end of the needle-valve; an adhesive chamber is formed inside the needle-valve, and a sidewall of the needle-valve is equipped with an adhesive inlet communicating with the adhesive chamber; and a feed inlet is communicating with the discharging orifice. The dispenser also comprises a pull bar and a valve core; the pull bar is movably arranged through one end, which is opposite to the syringe needle, of the needle-valve; the valve core is arranged inside the adhesive chamber and connected to one end of the pull bar; and the pull bar drives the valve core to move along a direction away from or toward the syringe needle, so as to close or open the adhesive inlet. The adhesive dispensing device has high dispensing precision and fast response speed to adhesive break.

Description

technical field [0001] The invention relates to a glue dispensing device. Background technique [0002] The glue dispensing device is a kind of equipment commonly used in the manufacturing industry, and it can apply fluid glue material, such as viscous resin, to a part to be processed so that it can be used to paste other parts. The main components of the dispensing device include a barrel and a dispenser. The barrel is filled with glue, compressed air enters the barrel through the valve, and pushes the glue in the barrel to enter the dispenser through the outlet at the lower end of the barrel. The glue dispenser includes a needle valve for glue storage and a needle for glue discharge. The control valve is connected with the needle valve for conducting or cutting off the supply of glue. [0003] However, the unstable working pressure of the compressed air will lead to uneven flow rate of the glue solution, which will make the dispensing volume uneven and affect the dispens...

AI Technical Summary

Problems solved by technology

[0003] However, the unstable working pressure of the compressed air will lead to uneven outflow speed of the glue, which will make the dispensing volume uneven and affect the dispensing accuracy

At the same time, after the traditional control valve cuts off the glue supply, the remaining glue in the needle will still flow out slowly from the needle, forming a "drawing" phenomenon

This "drawing" phenomenon not only wastes raw materials, but also causes pollution to parts that do not need to be glued.

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