Ejector pin type dispensing valve

Abstract

The invention discloses an ejector pin type dispensing valve. The ejector pin type dispensing valve comprises a middle valve body, and an upper cavity body and a lower cavity body are formed in the middle of the middle valve body in sequence; a piston is contained in the upper cavity, the piston divides the upper cavity into a first upper cavity and a second upper cavity, a return spring is arranged at the top of the piston, and a first air inlet connector is arranged on the side face of the middle valve body; an upper valve body is arranged above the middle valve body, a second air inlet connector is arranged on the side face of the upper valve body, and the second air inlet connector communicates with the first upper cavity; a lower valve body is arranged below the middle valve body, a glue inlet connector is arranged on the side face of the lower valve body, and a third cavity communicating with the lower cavity body is formed in the middle of the lower valve body; a hollow stud isarranged at the bottom of the lower valve body, and the stud is connected with a hollow dispensing head; and a valve needle used for controlling the opening and closing of the dispensing head is arranged at the bottom of the piston. The valve has the advantages that the glue discharging accuracy is high, continuous glue discharging and rapid glue breaking can be realized, and the use is very convenient.

Description

technical field [0001] The invention relates to the technical field of dispensing valves, in particular to a thimble type dispensing valve. Background technique [0002] The dispensing valve is the most important work execution part on the dispensing machine. The dispensing machine 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. The dispensing valve is connected by four parts: cylinder, valve body, material cylinder and glue outlet assembly. The cylinder and valve body are separated by advanced sealing materials to prevent glue from invading the cylinder. The material cylinder and the air cylinder are connected to the main body of the dispensing valve to ensure concentricity with the air cylinder. Use the solenoid valve to pneumatically control the movement of the cylinder, thereby driving the center rod to move up and down, and use the up and down movement of th...

AI Technical Summary

Problems solved by technology

[0004] In the thimble type dispensing valve in the prior art, the valve needle is not equipped with a sealing ring, which cannot play a sealing role, and the glue will be strung up into the cavity. The purpose of the glue is that it takes a certain amount of time for the air pressure to drive the valve needle. During this period of time, the glue is still flowing outward, and the glue cannot be cut off immediately, resulting in inaccurate dispensing.

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