Continuous heat seal device of packing list envelop

Abstract

The invention provides a continuous heat seal device of a packing list envelop which is used for improving processing efficiency and product quality of the packing list envelop. The technical proposal is as follows: the invention is composed of a rack, a worktable, an upper bracket, an iron conjunction part, an iron knife pressing and lifting mechanism and a traction part, wherein, the iron conjunction part comprises a longitudinal iron knife, an iron knife fixed plate, an iron belt, a front belt pulley, a rear belt pulley and propping belt pulleys; the iron knife fixed plate is connected with the upper bracket; the longitudinal iron knife is internally provided with a heating rod; the front belt pulley, the longitudinal iron knife and the rear belt pulley are arranged at the lower part of the longitudinal iron knife fixed plate in turn; the propping belt pulley is fixed on the iron knife fixed plate; the iron belt encircles the front and rear belt pulleys, the longitudinal iron knifeand each propping belt pulley; and the bottom surface of the iron belt is contacted with the worktable. According to the material features of the packing list envelop, the invention specially designsa device which can realize continuous heat seal; the device can ensure stable processing technology of packing list envelop heat seal, obtain better product quality and higher product percent of passand improve production efficiency greatly.

Description

technical field [0001] The invention relates to a plastic bag-making processing equipment, in particular to a device for processing postal adhesive bags with a composite structure of two or more layers of films, which can realize longitudinal continuous heat sealing, and belongs to the technical field of plastic processing machinery. Background technique [0002] Usually, when plastic bags are processed, the heat sealing process of the bag making machine adopts intermittent heat method, that is, the plastic bags are heat-sealed in sections, and the plastic film to be heat-sealed is placed on the working platform and pressed down by the heat-sealing device, and the plastic film is heat-sealed. From the beginning, the heat-sealed plastic film of this section is exported through the feeding device, and at the same time, the next section of heat-sealed plastic film is sent to the working platform for heat-sealing. At present, a large number of postal adhesive bags are also heat-...

AI Technical Summary

Problems solved by technology

The material of the back plastic bag is different from that of ordinary plastic film. In addition to the two layers of plastic film that need to be bonded, it also has a layer of backing paper, which has the characteristics of high strength, large thickness and small stretchability. It adopts the traditional intermittent heat sealing method. There are the following problems: It is easy to cause local hot-sealing not firm or local hot-sealing temperature is too high, resulting in different bag hot-stamping widths and hot-sealing strengths, which not only affects the appearance of the product, but also has a low pass rate. In addition, this kind of The production efficiency of heat sealing method is low

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