Cold cutting bag-making machine without stretching heat sealing line

Abstract

The invention discloses a cold cutting bag-making machine without stretching a heat sealing line. The cold cutting bag-making machine comprises a heat sealing knife. The cold cutting bag-making machine is characterized in that a group of heat sealing feed rollers are arranged in front of the heat sealing knife; a blowing device is arranged behind the heat sealing knife, so a relaxed section is generated by a material between the heat sealing knife and a cold cutting knife, and the relaxed section of the material is lightly swayed by the blowing device, so as to keep stretching of the relaxed section. The cold cutting bag-making machine has the advantages that a group of feed rollers are added in front of the heat sealing knife, and the blowing device is arranged behind the heat sealing knife, so the relaxed section is generated by the material between the heat sealing knife and the cold cutting knife, and the relaxed section of the material is lightly swayed by the blowing device, so as to keep stretching of the relaxed section. Due to the relaxed section of the material, a hot-pressed material hot-pressing line is prevented from being stressed by tension generated by back feed rollers, so stretching and thinning of the material hot-pressing line are avoided and the weight capacity of a finished bag is greatly improved.

Description

technical field [0001] The invention relates to a cold-cut bag-making machine with no stretching on the heat-sealing line. Background technique [0002] The main structure of the existing cold-cut bag-making machine includes a material shaft, a first feeding roller, a feeding control device, a heat sealing knife, a second feeding roller and a cold cutting knife, and the coiled raw materials on the material shaft are conveyed to ( There is a feeding control device in between to control the feeding amount) heat sealing knife for heat sealing (at least one hot pressing line is hot pressed on the raw material), and then transported to the cold cutting knife by the second feeding roller for slitting. Its disadvantage is that the driving force of the raw material passing through the sealing knife is generated by the second feeding roller (that is, the second feeding roller pulls the raw material backward). Since the hot pressing line that has just been hot-pressed has not been com...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a cold-cut bag-making machine without stretching of the heat-sealing line, so as to solve the problem in the prior art that the stretching of the hot-pressing line has just been hot-pressed at the heat-sealing knife when the raw material is cut. Thin, leading to the problem that the load-bearing capacity of the back cover of the produced plastic bag is reduced

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