A vacuum packaging machine

Abstract

The invention discloses a vacuum packaging machine. According to the vacuum packaging machine, only if a vacuum pump works till the vacuum degree inside a concave cavity reaches the preset value, an air cylinder acts to conduct hot pressing sealing on the opening end of a packaging bag, and thus, the effect that the vacuum degree inside the vacuum bag is up to standard can be ensured through the vacuum packaging machine; and in addition, the vacuum packaging machine is further provided with a positioning mechanism which is used for conducting abutting positioning on the packaging bag put intothe concave cavity, and thus, the packaging bag can be conveniently put in the correct position when being put into the concave cavity.

Description

technical field [0001] The invention relates to a vacuum packaging machine. Background technique [0002] The vacuum packaging machine can extract all the air in the packaging container and seal it to maintain a high degree of decompression in the bag. The scarcity of air is equivalent to the effect of hypoxia, so that microorganisms have no living conditions, so as to achieve the purpose of fresh food and no rot. [0003] The current vacuum packaging machine generally includes a base, a cover plate, a vacuum pump and a sealing mechanism, the base is provided with a cavity for placing the packaging bag containing the product, and the cover plate is used to cover the base to seal the cavity Sealing, the suction port of the vacuum pump is connected with the concave cavity through the pipeline, and the sealing mechanism is set in the concave cavity. The air in the concave cavity is drawn out, and after the vacuum pump works for a period of time, the sealing mechanism seals the...

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Problems solved by technology

[0004] However, the above-mentioned vacuum packaging machine also has the following disadvantages in use: after the vacuum pump works for a period of time (the length of time is set in advance), it is considered that the vacuum degree in the concave cavity is qualified, and then the product is sealed, but this is only applicable to The concave cavity is completely sealed without air leakage, but in actual use, the concave cavity is often not completely sealed by the cover plate, and there will always be some gaps that allow air to enter the concave cavity. After the length is exceeded, the predetermined vacuum degree cannot be reached in the concave cavity. At this time, sealing the packaging bag will make the vacuum degree in the packaging bag unqualified, so that the residual air in the packaging bag will easily cause the food in the packaging bag to rot.

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