Air deflating and inflating packaging machine

Abstract

The invention discloses an air deflating and inflating packaging machine. The key point of the technical scheme lies in that the air deflating and inflating packaging machine comprises a machine frame and a machine shell; a heat sealing device and a composite device for realizing vacuumizing and air inflating operations are arranged on the machine shell; the composite device is arranged at the inlet of the heat sealing device, and comprises a base and an air nozzle which is rotatably connected with the base; a resetting torsion spring is arranged between the air nozzle and the base; a strip-shaped groove for the air nozzle to penetrate out is formed in the machine shell; the air nozzle is connected with and sleeved by a magnetic ring; a magnetic block which generates magnetic force with the magnetic ring is arranged at the inner wall of the end part of the strip-shaped groove; air nozzle rotating inertia in a resetting process can be eliminated more quickly by taking the magnetic force generated by the magnetic ring which is arranged on the air nozzle and the magnetic block which is arranged on the inner wall of the strip-shaped groove as buffering force; meanwhile, the fatigue number of the resetting torsion spring can also be reduced, and the service life of the resetting torsion spring can be prolonged, so that the stability of the air nozzle in the resetting process is improved, and the situation of an influence on a subsequent operation caused by loose assembly of the air nozzle is avoided.

Description

technical field [0001] The invention relates to the field of packaging machinery and equipment, in particular to a pumping and filling packaging machine. Background technique [0002] Simply put, a packaging machine is a machine that packs products, which plays a protective and aesthetic role. Most of the existing food packaging requires vacuum packaging to prevent mildew and play the role of quality and freshness; or after vacuuming Fill in inert gas to prevent food oxidation and protect food from being crushed. For example, puffed food is usually packaged in this way. [0003] At present, there is this kind of packaging machine specially for food packaging on the market, which includes a compound device for vacuumizing and inflating food packaging bags and a heat sealing device. The heat sealing device performs separate operation, and the air nozzle is one of the important components to realize the vacuuming and inflation operations. The strip groove, and there is a retu...

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Problems solved by technology

[0003] At present, there is this kind of packaging machine specially for food packaging on the market, which includes a compound device for vacuumizing and inflating food packaging bags and a heat sealing device. The heat sealing device performs separate operation, and the air nozzle is one of the important components to realize the vacuuming and inflation operations. The strip groove, and there is a return torsion spring between the air nozzle and the casing, the air nozzle is placed in the food packaging bag for pumping and inflating operations, and one side of the food packaging bag is placed on the roller of the heat sealing device. At the same time, it is driven to move along the conveying direction, and the food packaging bag will drive the air nozzle to rotate during the moving process, until the air nozzle comes out of the food packaging bag, it will return to its original position under the action of the reset torsion spring to facilitate subsequent repeated operations; In the process, due to the action of the reset torsion spring, it will have a certain inertia and will stop after a period of shaking, and the stability is poor. On the one hand, it will easily cause the installation of the valve to shake, and the life of the torsion spring will also be reduced. Therefore, it is shortened, and there may be continuous impact with the inner wall of the end of the bar groove, resulting in damage to the air nozzle

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