Packaging bag heat sealing system and heat sealing method

Abstract

The invention discloses a packaging bag heat sealing system. The packaging bag heat sealing system comprises a first temperature control module, a second temperature control module, electric shieldingheating sheets and shielding sheets, wherein the first temperature control module is used for controlling high-temperature heating, the first temperature control module comprises at least four firstheat sealing units, and the first heat sealing units are arranged at the thick layer positions of a packaging bag; the second temperature control module is used for controlling low-temperature heating, the second temperature control module comprises at least two second heat sealing units, and the second heat sealing units are arranged at the thin layer positions of the packaging bag; the electricshielding heating sheets are correspondingly connected with the first heat sealing units and the second heat sealing units; and the shielding sheets are arranged between the first heat sealing units and the second heat sealing units. According to the packaging bag heat sealing system, the two temperature control modules are arranged to control the multiple heat sealing units to control different heat sealing temperatures at different positions of the packaging bag according to different thicknesses, and therefore complete heat sealing of the packaging bag is achieved, and material leakage is avoided.

Description

technical field [0001] The invention relates to the field of packaging bags, in particular to a packaging bag heat sealing system and heat sealing method. Background technique [0002] Packaging bags are widely used in daily life and industrial production, and packaging bags need to be heat-sealed during the production process. The packaging bag is generally provided with two layers of sheets. In order to increase the storage space of the packaging bag, both sides of the packaging bag have inwardly bent sides, thereby forming four layers of sheets on both sides. When the packaging machine in the prior art heat-seals the packaging bag, the packaging bag is transported to the temperature control system for heat sealing, and the temperature control system heats the packaging bag for a certain period of time. Since the heat-sealing system in the prior art adopts countdown heating, it is impossible to accurately control the temperature. When the heat-sealing unit is heated for a...

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Problems solved by technology

[0003] One of the objectives of the present invention is to provide a heat sealing system for packaging bags to solve the technical problems in the prior art that the heat sealing of packaging bags is incomplete or damaged, resulting in material leakage and the heat sealing unit is easily damaged

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