Modified atmosphere packaging machine and modified atmosphere packaging method

Abstract

The invention discloses a modified atmosphere packaging machine and a modified atmosphere packaging method. The modified atmosphere packaging machine comprises an upper film, a lower film, an upper cavity and a lower cavity, wherein the upper film and the lower film are used for packaging articles, the upper cavity and the lower cavity are placed between the upper film and the lower film, the lower cavity can be combined with or separated from the upper cavity, and the upper cavity and the lower cavity are provided with an upper concave inner cavity and a lower concave inner cavity respectively; a heating plate for press-fitting the periphery of the upper film and the periphery of the lower film to package the articles is arranged in the upper concave inner cavity; when the lower cavity and the upper cavity are combined, a first space between the upper film and the upper concave inner cavity, a second space between the upper film and the lower film and a third space between the lower film and the lower concave inner cavity are formed in the modified atmosphere packaging machine; and the upper cavity is provided with a channel for pumping out air in the first space and the second space and a channel for filling inert gas into the first space and the second space after the vacuum degree of the second space meets the requirement, and the lower cavity is provided with a channel forpumping out air in the third space and a channel for filling inert gas into the third space. By use of the packaging machine and method, equipment cost and machining cost can be reduced.

Description

technical field [0001] The present application relates to the technical field of packaging machinery, in particular to a modified atmosphere packaging machine and a modified atmosphere packaging method. Background technique [0002] In order to maintain the freshness of fresh ingredients such as vegetables, fruits, seafood and meat, it is common practice to use a modified atmosphere packaging machine to pack fresh ingredients with packaging films to form air that is sucked out and filled with oxygen. Inert gas package to reduce oxidation of fresh ingredients and prolong shelf life. [0003] Figure 4 A schematic diagram of an existing modified atmosphere packaging machine is shown. Such as Figure 4 As shown, the modified atmosphere packaging machine includes an upper chamber 1 and a lower chamber 2 facing up and down, and the lower chamber 2 can move up and down relative to the upper chamber 1 to integrate with the upper chamber 1 or leave the upper chamber 1 . The upper ...

AI Technical Summary

Problems solved by technology

[0005] It can be seen that the existing modified atmosphere packaging machine needs three sets of vacuum pumping equipment and three sets of inert gas filling equipment, which increases the equipment cost

At the same time, the existing modified atmosphere packaging machine also needs to set the third air channel 24 and the third inert gas channel 25 on the lower cavity 2, which increases the processing steps of the lower cavity 2, thereby increasing the processing cost of the modified atmosphere packaging machine

Images