On-line inspection method and apparatus for vacuum degrees of sealed containers

Abstract

The invention discloses an on-line inspection method and apparatus for vacuum degrees of sealed containers. A position sensor is arranged above a filling production line and along the center and two sides of container covers. The position sensor is connected with a micro-control unit and an encoder. The vacuum degrees of the sealed containers can be inspected on-line without stopping machines by measuring deflection deformation of the container covers. On-line eliminations without stopping machines can also be realized. The method and apparatus have high reliability and can improve productivity.

Description

technical field [0001] The invention belongs to the technical field of automatic detection, and in particular relates to a method and a device for online detection of the vacuum degree of a closed container. Background technique [0002] In recent years, with the improvement of people's living standards and the continuous increase of travel and tourism, people's consumption concepts are constantly changing. Canned food is deeply loved by people for its convenience, hygiene and easy storage. Because glass jars and metal jars have good airtightness, strong pressure resistance and high recycling value, they have become the main containers for vacuum packaging liquid food and beverages. The body of the glass tank is made of glass, and the lid is mostly made of tinplate stamping. After the product is filled, the tinplate tank often uses a vacuum method to place the container and its contents in a closed volume, and vacuumizes the closed volume with a vacuum pump. The air density...

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Problems solved by technology

However, this method requires that the can filling cannot stick to the detection surface, and the top clearance in the tank must be within a certain range to work normally, otherwise it cannot be accurately detected

The filling height of the same batch of domestic canned products is generally quite different, and the vibration of the production line is relatively severe. Especially when testing products with high viscosity such as rice pudding, the testing surface will be more or less sticky with some filling liquid, so it is difficult to achieve The above detection requirements, coupled with the greater impact of the workshop temperature, noise and other environments, so the detection reliability is not high, and it cannot be popularized and used in China

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