Analyze the operation and characteristics of the vacuum packaging machine

[Chinese Packaging Network News] A vacuum packaging machine is a device that creates a low-pressure environment inside a bag, then automatically seals it. This high level of vacuum minimizes the remaining air, effectively preventing the growth of bacteria and other microorganisms, reducing oxidation, and avoiding spoilage, mold, or deterioration of the products. Additionally, for soft goods, vacuum packaging can significantly reduce the volume, making storage and transportation more efficient.

The working principle of a desktop vacuum packaging machine involves using plastic composite films or aluminum foil composite materials to package various types of goods, including solid, liquid, powder, and paste-like food items such as fruits, pickles, preserved fruits, chemicals, electronic components, precision instruments, and rare metals. These machines are commonly used for vacuum sealing or vacuum inflation packaging.

A: Classification of Vacuum Packaging Machines

Vacuum packaging machines come in different types, such as desktop models, single-chamber, dual-chamber, vertical, home-use, and pump-style vacuum packaging machines. Each type is designed for specific applications, offering flexibility based on the user's needs and production scale.

II: Working Process of a Vacuum Packaging Machine

1. Vacuuming: The vacuum chamber is closed, and the vacuum pump starts operating. As the vacuum level inside the chamber reaches the set point (controlled by a time relay), the pump stops. During this phase, a two-position three-way solenoid valve activates, sealing the heat-sealing area while keeping the hot-pressing frame in place.

2. Heat Sealing: Once the solenoid valve is deactivated, atmospheric pressure enters the heat-sealing chamber through an inlet, creating a pressure difference that pushes the hot-pressing frame down onto the bag’s opening. At the same time, the heat-sealing transformer activates, initiating the sealing process. A second time relay controls the duration of the sealing operation before it concludes.

3. Gas Return: A second two-way solenoid valve allows air back into the vacuum chamber, bringing the vacuum gauge back to zero. The hot-pressing frame is reset by a spring mechanism, and the vacuum chamber cover opens.

4. Cycle: The vacuum chamber moves to the next position, starting the next cycle. The left and right chambers operate alternately, ensuring continuous and efficient operation.

III: Key Features of Vacuum Packaging Machines

1. These machines are capable of accurately filling and sealing liquids and high-viscosity materials at high temperatures, ideal for external vacuum packaging systems.

2. They use an extrusion exhaust method, which is suitable for internal vacuum packaging systems.

3. The materials used are corrosion-resistant, meeting strict food hygiene and safety standards.

4. The machine structure is robust, with an intuitive user interface that makes operation simple and straightforward.

5. They can be seamlessly integrated with various filling systems to achieve optimal packaging results, making them versatile for different industries and applications.