Method for detecting opening of packaging bag

Abstract

The invention relates to a method for detecting opening of a packaging bag. The method comprises the following steps that a bag opening is opened through a pre-process firstly; a piston rod of a cylinder is driven to move downwards, and a bag opening pounding head is inserted into the bag opening to enable the side face of the bag opening pounding head to be nearly attached to the inside of the bag opening; an air inlet joint is connected with an air blowing device, and compressed air is led into the bag through the air inlet joint so as to open the bottom of the packaging bag; gas can push a detection floating block upwards along side channels along with the increasing of the gas in a bag body and pressure in the bag body, and the detection floating block is made to move upwards along a mounting channel in the bag opening pounding head; and when the detection floating block floats upwards and triggers a photoelectric switch, the photoelectric switch sends a signal of complete opening of the bottom of the packaging bag. According to the method for detecting opening of the packaging bag, bag opening and detection are synchronous, and accordingly detection time is shortened; and meanwhile, due to the effective bag opening, the number of hard standing bags with the bag bottoms not opened is reduced, and the packaging speed and efficiency are improved.

Description

technical field [0001] The invention relates to a detection method, in particular to a detection method for opening a packaging bag. Background technique [0002] The bag opening mechanism of the prior art, in the case of rigid stand-up bag opening requirements, most of them cannot effectively open the bottom of the bag completely because the packaging bag is relatively hard, let alone effectively detect while opening the bag, resulting in speed And the efficiency becomes worse, which limits the packaging capacity of the machine and cannot meet the requirements of fast and effective packaging. Contents of the invention [0003] The object of the present invention is to provide a detection method for opening a packaging bag, which shortens the detection time by synchronizing the opening and detection, and at the same time, effectively opening the bag also reduces the number of hard stand-up pouches that cannot be opened at the bottom, and improves the packaging quality. sp...

AI Technical Summary

Problems solved by technology

[0002] The bag opening mechanism of the prior art, in the case of rigid stand-up bag opening requirements, most of them cannot effectively open the bottom of the bag completely because the packaging bag is relatively hard, let alone effectively detect while opening the bag, resulting in speed And the efficiency becomes worse, which limits the packaging capacity of the machine and cannot meet the requirements of fast and effective packaging.

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