External vacuum packaging machine is a device that extracts air from the outside of the packaging bag through a suction nozzle to achieve vacuum packaging. Here is a detailed introduction to it:

1、 Working principle

The working principle of the external vacuum packaging machine is relatively simple and direct. It creates a vacuum environment by setting an exhaust nozzle on the outside of the packaging bag and using a vacuum pump to extract the air inside the packaging bag. Subsequently, the sealing process is completed through a sealing device to ensure that the vacuum state inside the packaging bag is maintained. This working method allows the external vacuum packaging machine to be unrestricted by the size and shape of the packaged items, making it particularly suitable for vacuum packaging of large or irregular items.

2、 Equipment features

1. Efficiency: The external vacuum packaging machine has a fast vacuum pumping speed, which can greatly improve packaging efficiency and meet the needs of large-scale production.

2. Wide applicability: Not limited by the size and shape of the packaged material, especially suitable for vacuum packaging of large or irregular packaging materials.

3. Good sealing performance: After vacuum packaging, the pressure inside the packaging bag rapidly decreases, and the sealing effect is good, which can effectively extend the shelf life of the item.

4. Easy to operate: The device has a user-friendly interface, simple and easy to understand operation, and does not require professional training to get started.

3、 Application Fields

External vacuum packaging machines are widely used in multiple fields, including but not limited to:

1. Food industry: Vacuum packaging of foods such as meat, cooked food, vegetables, fruits, etc. can extend the shelf life of food and prevent oxidation and spoilage.

2. Pharmaceutical industry: Vacuum packaging of drugs, medical devices, etc. ensures the sterility and sealing of products.

3. Chemical industry: Vacuum packaging of chemicals, pigments, powders, etc. to prevent materials from getting damp, deteriorating, or reacting with air.

4. Other fields: such as vacuum packaging of precision electronics, semiconductors, hardware devices and other products to prevent oxidation, discoloration or moisture damage.