Zero-tension plastic bag production equipment driven by double driving rollers

Abstract

The invention provides zero-tension plastic bag production equipment driven by double driving rollers. The zero-tension plastic bag production equipment driven by double driving rollers comprises a front-end feeding device, a zero-tension feeding device, a hot-pressing sealing device and an air blowing auxiliary conveying device; the zero-tension feeding device comprises a front traction pair roller and a rear traction pair roller which are respectively driven by two sets of servo motors, and a floating device is arranged between the front traction pair roller and the rear traction pair roller; and the hot-pressing sealing device is arranged between the front traction pair roller and the rear traction pair roller. According to the zero-tension plastic bag production equipment driven by thedouble driving rollers, the zero tension of a plastic bag is kept in the conveying process of hot-press sealing, and the plastic bag which is just subjected to hot-press sealing is prevented from being pulled and deformed by the pressure sealing.

Description

technical field [0001] The invention relates to the technical field of plastic bag production equipment, in particular to zero-tension plastic bag production equipment driven by double driving rollers. Background technique [0002] Plastic bags are common products in daily life, and the production of plastic bags needs to be realized by bag making machines. The bag making machine is a kind of equipment that transfers the prefabricated double-layer plastic film, irons the predetermined part during the transfer process, and is accompanied by a die-cutting process to make a plastic bag. In the conveying process of the existing plastic bags, a single conveying pair of rollers is mostly used to convey, and a larger pressure is applied to the plastic bags during the conveying process, so that the plastic bags can be transported forward. In front of the conveying pair of rollers, there is generally a sealing iron knife, which is used to heat-press and seal the plastic bags. If it...

AI Technical Summary

Problems solved by technology

However, biodegradable plastic bags are very soft because they are filled with a large amount of starch and other degradable materials, and are very sensitive to tension during hot pressing. Sealing, and pulling up directly after heat sealing, the plastic bag is under a lot of force in this process, which will cause the seal of the degradable plastic bag to be pulled and deformed, which affects the firmness of the seal and affects the appearance of the bag body

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