Thin film bag forming edge-sealing device and method

Abstract

The invention relates to the field of thin film packaging, in particular to a thin film bag forming edge-sealing device and method. The device comprises an edge-sealing rack, an edge-sealing pushing mechanism, a heat sealing mechanism and a thin film suction mechanism; the heat sealing mechanism and the thin film suction mechanism are both fixed to the edge-sealing rack; the two ends of the edge-sealing pushing mechanism are connected with the output end of a bag making and opening device and the heat sealing mechanism correspondingly, and the edge-sealing pushing mechanism makes contact witha packaging box; the output end of the heat sealing mechanism makes contact with openings in the two ends of a film bag, and the output end of the thin film suction mechanism makes contact with a thinfilm sealed and cut off by the heat sealing mechanism; the edge-sealing pushing mechanism is used for pushing the opened film bag and the packaging box to the heat sealing mechanism; the heat sealingmechanism is used for sealing edges of the openings in two ends of the film bag; and the thin film suction mechanism is used for sucking and collecting the thin film cut off by the heat sealing mechanism. According to the thin film bag forming edge-sealing device, by arranging the thin film suction mechanism, the cut-off thin film is prevented from adhering to a heat sealing head, and the edge-sealing quality of the openings of the film bag is improved.

Description

technical field [0001] The invention relates to the field of film packaging, in particular to a film bag forming edge sealing device and method. Background technique [0002] Film packaging is mainly a packaging method that wraps the product with a heat-shrinkable film and then heats it so that the film shrinks and wraps the product. For the film packaging process, it generally includes: heat-cutting, pushing the box into the bag, heat-sealing, heat-cutting four corners, and blanking. The film packaging of the packaging box can not only beautify the outer surface of the packaging box, but also protect the mobile phone during the transportation process from the manufacturer to the dealer, preventing damage to the mobile phone during the transportation process. Therefore, for packaging box processing, its film packaging is particularly important. [0003] The State Intellectual Property Office of China has published a publication number of CN208248549U, and the patent name i...

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Problems solved by technology

[0004] The prior art has the following deficiencies: 1. When making a film bag and moving the film, a suction device with a fixed length is used to suck the film, and then the driving device drives the suction device to move to the corresponding station to move the film sucked by the suction device ; and the suction device absorbs the film through vacuum generation, and the degree of bonding between the suction device and the film is required when the vacuum generates suction; when the suction bottom plate in the suction device has poor flatness or the surface of the film is uneven At this time, there will be a certain gap between the suction device and the film, which will destroy the fit between the suction device and the film, and a part of the suction force of the suction device on the film will flow out along the gap, thereby causing the suction device to the film. At the same time, the suction device with a fixed length can only absorb the film that is longer than the suction device; when the film length is short, the suction hole in the suction device that is longer than the film will also be damaged because it is not attached to the film. Leakage, which makes the aspirator less adaptable

2. When stretching the film bag, the forming device first makes the film into a film bag in which the upper and lower films are in contact; then the upper and lower suction plates of the suction device are respectively in contact with the upper and lower sides of the film bag, and the suction device drives the upper and lower suction plates respectively upward and downward. The downward movement separates the upper and lower sides of the film bag in contact with the suction plate; and the film surface has a certain viscosity, when the upper and lower side films of the film bag are in contact, the upper and lower films will be bonded due to the surface viscosity; and The material of the film is soft and it is easy to deform when it is under force. When the upper and lower suction plates of the suction device drive the bonded upper and lower films to separate through suction, the film will be irregular due to the simultaneous suction and irregular adhesion. Deformation; resulting in different degrees of wrinkles in some parts of the film bag when the film bag is stretched, affecting the quality of the film bag

After the excess film at the film bag opening is cut off, there is no device for recycling, and the excess film will be bonded to the heated heat-sealing head; after the heat-sealing head seals a large number of film bags, the excess film on the heat-sealing head will More accumulation, part of the film will even stick to the cutting part of the heat-sealing head, reducing the sharpness of the cutting part of the heat-sealing head; resulting in insensitive cutting of the heat-sealing head and reducing the quality of the edge sealing of the film bag opening

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