Modified atmosphere packaging machine

Abstract

The invention particularly relates to a modified atmosphere packaging machine, and aims to provide a modified atmosphere packaging machine which has the advantages of effectively lowering of the cost and convenience in use. The modified atmosphere packaging machine comprises a frame, wherein the frame is provided with a packaging barrel and a recovering barrel; the packaging barrel is wound with a packaging film; a module assembly is arranged on the frame and below the packaging barrel; an upper vacuum chamber and a lower vacuum chamber are isolated into two independent enclosed cavities. When a packaging box is inflated, refreshment gas can only be charged into the lower vacuum chamber, and air is charged into the upper vacuum chamber, so that a large amount of refreshment gas is saved, and cost for transporting the refreshment gas is saved; meanwhile, the electric power, the labor force and the like consumed by producing the refreshment gas in a gas station are saved.

Description

technical field [0001] The invention relates to the field of food packaging equipment, in particular to a modified atmosphere fresh-keeping packaging machine. Background technique [0002] Modified atmosphere fresh-keeping packaging machine is a food packaging machine that uses composite gas replacement fresh-keeping packaging technology. The principle of modified atmosphere packaging is to use fresh-keeping gas (a variety of gases are mixed according to the characteristics of the materials to be packaged), replace the air in the box or bag, and change the external environment of the material in the package to inhibit the growth and reproduction of bacteria and microorganisms , to slow down the metabolism of the material and prolong the freshness or shelf life of the material. Therefore, the current fresh-keeping packaging in food and other fields has gradually developed from vacuum packaging to modified atmosphere packaging, that is, using other fresh-keeping or quality-pr...

AI Technical Summary

Problems solved by technology

Method 2, because the vacuum pumping operation is not used, the gas replacement is faster and the productivity is higher, but the gas replacement rate and gas mixing accuracy are low, which affects the freshness preservation effect of the product, and at the same time has higher requirements for production equipment

[0004] For the packaging method of vacuuming first and then flushing fresh-keeping gas, the vacuum-filled fresh-keeping gas will fill the entire vacuum chamber. After sealing the box, the remaining fresh-keeping gas in the vacuum chamber does not enter the packaging bag, and the remaining fresh-keeping gas remains after the mold is opened. Just emit it into the atmosphere and waste it all

Therefore, such a packaging method will waste a lot of fresh air

[0005] A modified atmosphere packaging machine described in prior art CN201210120399 includes a frame and a cylinder placed in the frame, a pressure plate, a pressure rod, an upper vacuum chamber and a lower vacuum chamber; the cylinder includes a cover plate, an upper piston, a piston Rod, lower piston and cylinder head; the cover plate is connected with the frame and the cylinder body respectively, the two ends of the upper piston are slidingly connected with the upper chamber of the cylinder body respectively, one end of the piston rod is connected with the upper piston, and the other end passes through the lower piston and the cylinder head in turn And the pressure plate is connected with the lower vacuum chamber; the upper end of the lower piston is slidingly connected with the lower chamber of the cylinder body, and the lower end is slidingly connected with the cylinder head and connected with the pressure plate; the pressure plate is connected with the sealing film cutting device in the upper vacuum chamber through the pressure rod, but each time The fresh-keeping gas still fills the upper vacuum chamber and the lower vacuum chamber during packaging, resulting in a waste of fresh-keeping gas

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