A Negative Pressure Feedback Suction Ejector Type Dispensing Valve

Abstract

The invention discloses a negative pressure feedback back-suction thimble type dispensing valve, which can solve the technical problem of air bubbles or vacuum bags generated during the use of the thimble type dispensing valve in the prior art, including a micrometer gauge (1), Upper valve body (6), lower valve body (15), glue outlet nozzle (16), negative pressure connecting pipe (9), two-position three-way solenoid valve (12); the upper valve body (6) includes a spring cap (2), compression spring (3), limit block (4), sealing ring (5), piston (7); the lower valve body (15) includes an air collection chamber (8), a diaphragm (10), an inlet Glue port (11), needle valve (13), valve chamber (14). In the present invention, by changing the upper glue feeding method to the lower glue feeding method, increasing the gas collection chamber and the negative pressure feedback chamber, the glue discharge continuity and instantaneous glue breaking performance of the dispensing valve are significantly improved, and the thimble type glue dispensing in the prior art is solved. The technical problem of air bubbles or vacuum bags during the use of the valve.

Description

technical field [0001] The invention relates to a glue dispensing valve, in particular to a negative pressure feedback sucking thimble type glue dispensing valve. Background technique [0002] The dispensing valve is the most important work execution part on the dispensing machine. The glue dispenser is an automatic machine that controls the fluid through the dispensing valve, and drips and coats the fluid on the surface of the product or inside the product. With the continuous development of technology, dispensing machines are widely used in the electronics manufacturing industry, industrial electrical, solar photovoltaic, construction engineering, etc., and the market application is quite popular. At present, the equipment is manual, semi-automatic, and fully automatic. The degree of automation is increasing. [0003] The application fields of dispensing machines are constantly enriched and developed, and various requirements are put forward for dispensing valves. At p...

AI Technical Summary

Problems solved by technology

However, during the rapid lifting of the valve, the glue has a downward movement speed at this time, and there is a negative pressure at the valve to generate air bubbles or vacuum bags; while the ordinary thimble dispensing valve moves downward when the valve is closed, there is no suction function , the glue breaking performance is slightly poor. When the valve is opened, the thimble is lifted quickly, and the glue moves from top to bottom into the valve body. Since the direction of glue movement is opposite to the opening direction of the thimble, a vacuum negative pressure will also appear on the top when the needle valve is opened. Air bubbles or vacuum packs can also be produced

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