Glue cylinder and glue feeding method thereof

Abstract

The invention relates to a glue cylinder comprising a cylinder block of the glue cylinder and a glue feeding passage for feeding glue into the cylinder block. The glue feeding passage comprises a pressure regulating valve and a back pressure valve, the pressure regulating valve is arranged at the front end of the glue feeding passage, the back pressure valve is arranged at the rear end of the pressure regulating valve, the pressure regulating valve has a first pressure threshold value, and pressure relief is carried out at the pressure regulating valve when the pressure of the glue in the glue feeding passage is larger than the first pressure threshold value; the back pressure valve has a second pressure threshold value, and the back pressure valve is opened when the pressure of the glue in the glue feeding passage is greater than the second pressure threshold value; the cylinder block comprises a body and a cover body, the middle portion of the cover body is provided with an opening, the opening allows the glue feeding passage to be inserted into the body for glue feeding, a first sealing ring is arranged between the glue feeding passage and the hole, and a glue leaking observing hole is formed in the position corresponding to the first sealing ring and on the side wall, provided with the hole, of the cover body. The invention also provides a glue feeding method of the glue cylinder. According to a new glue cylinder glue feeding control structure and the glue feeding control method, a liquid level sensor in a traditional glue cylinder is eliminated, and influences of the liquid level sensor on the quality of the glue in the glue cylinder are avoided.

Description

technical field [0001] The invention relates to the field of glue injection devices, in particular to a glue tank and a glue feeding method thereof. Background technique [0002] In the glue tank of the glue injection machine in the prior art, field sensors are generally installed in the glue tank to control the amount of glue fed into the glue tank, and multiple liquid level sensors of different heights are also installed in the glue tank, both It can ensure sufficient glue storage in the glue tank and prevent the glue tank from exploding due to the excessive amount of glue in the glue tank. The liquid level sensor is corroded, which makes the liquid level sensor abnormally misreport the liquid level in the cylinder, causing the glue tank to explode; and the liquid level sensor works with a spot, and under the combined action of ammonia water, the glue at the liquid level probe is easy to condense. Granular foreign matter will affect the injection quality of the subsequent...

AI Technical Summary

Problems solved by technology

[0002] In the glue tank of the glue injection machine in the prior art, field sensors are generally installed in the glue tank to control the amount of glue fed into the glue tank, and multiple liquid level sensors of different heights are also installed in the glue tank, both It can ensure sufficient glue storage in the glue tank and prevent the glue tank from exploding due to the excessive amount of glue in the glue tank. The liquid level sensor is corroded, which makes the liquid level sensor abnormally misreport the liquid level in the cylinder, causing the glue tank to explode; and the liquid level sensor works with a spot, and under the combined action of ammonia water, the glue at the liquid level probe is easy to condense. Granular foreign matter will affect the injection quality of the subsequent injection machine

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