Side sealing mechanism of film packaging machine

Abstract

The invention discloses a side sealing mechanism of a film packaging machine. The side sealing mechanism comprises a rack, a heat sealing device and a traction device, wherein the heat sealing device and the traction device are mounted on the rack. The heat sealing device comprises a left heat sealing plate and a right heat sealing plate which are arranged in bilateral symmetry. The traction device comprises two sets of transmission components arranged in bilateral symmetry. The side sealing mechanism is characterized in that each transmission component comprises a front transmission wheel, a rear transmission wheel and a heat isolation transmission belt; the heat sealing device is arranged between the front transmission wheels and the rear transmission wheels; and each heat isolation transmission belt penetrates a clearance between the left heat sealing plate and the right heat sealing plate and is arranged on the corresponding front transmission wheel and rear transmission wheel. According to the side sealing mechanism, heat of the left heat sealing plate and the right heat sealing plate is stably transmitted to a film through the heat isolation transmission belts, and therefore the film is prevented from being damaged by the high temperature; and the film is prevented from being bonded to the left heat sealing plate and the right heat sealing plate during heat sealing, and therefore it is guaranteed that the film is intact.

Description

technical field [0001] The invention relates to an improved invention of a film packaging machine, in particular to a side sealing mechanism of the film packaging machine. Background technique [0002] The side sealing of existing film packaging machines mainly adopts two methods, one is to use rollers to directly roll heat seal, and the other is to use a heat-sealing plate for heat-sealing. The tube is heated by a heating tube. The above two solutions can only be used for heat sealing of thicker films, and are not suitable for thin films such as PE and CPP. The main reason is that when the heat sealing temperature is high, sticking is easy Knife phenomenon, that is, the film sticks to the roller or the heat-sealing plate, resulting in damage to the packaging bag. If the temperature is low, the adhesion cannot be achieved, that is, the seal cannot be achieved. Therefore, the existing film packaging machine cannot realize the packaging of thin films such as PE and CPP. Con...

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Problems solved by technology

[0002] The side sealing of existing film packaging machines mainly adopts two methods, one is to use rollers to directly roll heat seal, and the other is to use a heat-sealing plate for heat-sealing. The tube is heated by a heating tube. The above two solutions can only be used for heat sealing of thicker films, and are not suitable for thin films such as PE and CPP. The main reason is that when the heat sealing temperature is high, sticking is easy Knife phenomenon, that is, the film sticks to the roller or the heat-sealing plate, resulting in damage to the packaging bag. If the temperature is low, the adhesion cannot be achieved, that is, the seal cannot be achieved

Therefore, the existing film packaging machine cannot realize the packaging of thin films such as PE and CPP.

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