Vacuum bag pre-opening device

Abstract

A vacuum bag pre-opening device comprises a film roll, a hot cutting mechanism, a vacuum conveying belt and a vacuum bag pre-opening arm, and is characterized in that the film roll is arranged at oneend of the vacuum conveying belt, and the hot cutting mechanism is arranged between the film roll and the vacuum conveying belt; the vacuum bag pre-opening arm is arranged at the other end of the vacuum conveying belt; the hot cutting mechanism comprises a hot cutter and a hot cutting base plate; the vacuum conveying belt is provided with a machine frame, a conveying belt body and a vacuum pipeline; and the vacuum bag pre-opening arm is provided with a motor which is in transmission connection with a rotating arm. According to the device, a double-layer film is conveyed out through rotating rollers, the vacuum conveying belt sucks and fixes the double-layer film for synchronous transmission film-drawing, an existing film drawing mechanism can be replaced, the hot cutting mechanism can conduct hot cutting only by waiting for a packaging film to be in place, station components are saved, and the reciprocating reset film-drawing time of the film drawing mechanism is saved; and meanwhile,avoiding of a bag opening device can be completed while the rotating arm pre-opens the bag, the number of the mechanism avoiding steps is reduced, and therefore the production efficiency is improved.

Description

technical field [0001] The invention relates to the field of packaging and bag making, in particular to a vacuum pre-opening device. Background technique [0002] In the pre-opening process of the existing packaging film bags, most of them use the film pulling mechanism to pull the double-layer film to a limited position, and then move up and down through the upper and lower bag opening suction nozzles respectively to complete the opening of the packaging bag. Pre-opening, and finally the bag is completely opened by the bag opening device; however, this pre-opening method requires more processes during the bag transfer process, and the upper and lower bag opening nozzles must be kept out of the way when the bag is pre-opened. The bag opening device and the film pulling mechanism need to be reset after the bag opening is completed to perform the next film pulling, which increases the time for a single bag making. When the reset time is unreasonable, it will easily lead to low...

AI Technical Summary

Problems solved by technology

[0002] In the pre-opening process of the existing packaging film bags, most of them use the film pulling mechanism to pull the double-layer film to a limited position, and then move up and down through the upper and lower bag opening suction nozzles respectively to complete the opening of the packaging bag. Pre-opening, and finally the bag is completely opened by the bag opening device; however, this pre-opening method requires more processes during the bag transfer process, and the upper and lower bag opening nozzles must be kept out of the way when the bag is pre-opened. The bag opening device and the film pulling mechanism need to be reset after the bag opening is completed to perform the next film pulling, which increases the time for a single bag making. When the reset time is unreasonable, it will easily lead to low bag making efficiency

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