Sealing online detection system for small size flexible packaging bag

Abstract

The invention discloses a sealing online detection system for a small size flexible packaging bag. The system comprises a first, second and third conveyor belts respectively used for conveying a packaging bag to be inspected, a packaging bag to be inspected placed in an array and a qualified packaging bag, a first and second gripping mechanisms of a mechanical arm with a machine vision system, a sealed compartment, a frame, an air pressure source for vacuuming or pressurizing the sealed compartment and a controller; the sealed compartment is composed of a drawer-shaped compartment body, an aircylinder driving the compartment body, an air pressure sensor for measuring the air pressure in the compartment body, first and second air valves, a light source and a camera and is mounted on the frame, and a closed container is formed when the compartment body and the first and second air valves are closed; when the compartment body is closed, the first air valve connected to the air pressure source controls the connecting and the disconnecting of the air pressure source, and the second air valve controls the connecting and disconnecting of the compartment body with the atmosphere; a camerais used for photographing the packaging bag in the compartment; the controller detects an air pressure value and the setting of a pressing protecting time and the processing and display of the data,and controls the system to achieve the automatic detection of the packaging bag. The system automatically performs the sealing inspection of the packaging bag on a production packaging line, and has high detection efficiency and automation.

Description

technical field [0001] The invention relates to an airtightness detection device for food packaging bags, in particular to an on-line airtightness detection system for small-size flexible packaging bags. Background technique [0002] At present, small-sized flexible packaging bags (hereinafter referred to as packaging bags) are widely used in food packaging. A well-sealed packaging bag can prevent the contents from being damaged by biological, chemical, and physical external factors, so the factory inspection of the packaging bag's airtightness is very important. [0003] It would be ideal if the factory inspection of the airtightness of packaging bags can be carried out on the packaging production line for non-destructive inspection of the airtightness of each packaging bag. In the prior art, there are mainly the following methods for non-destructive testing of the sealing of packaging bags: [0004] 1. After immersing the packaging bag in an airtight container filled wit...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that after the packaging bag is taken out of the water, the moisture on the surface needs to be removed before it can be put into storage, which is not suitable for use on the production line.

The disadvantage of this method is: if the contents of the packaging bag are solid, the extruded material may press the solid contents, making the judgment of the tightness inaccurate

But both have the following defects: 1. The airtight container can only detect one packaging bag at a time, and the utilization rate of the device is low; 2. For the packaging bag with poor airtightness, the internal air pressure will change rapidly with the air pressure in the container And to achieve air pressure balance, it is difficult to judge whether the sealing of the packaging bag is good only by the change of the indication value of the pressure sensor

Its disadvantages are that the visual inspection method has problems such as low degree of automation, easy fatigue of personnel observation, and error-prone.

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