Tail portion folding device of plastic bag automatic folding strapping machine

Abstract

The invention discloses a tail portion folding device of a plastic bag automatic folding strapping machine. The tail portion folding device comprises a machine frame, a folding plate device and a press rod extending device and a press rod lifting device, wherein the press rod extending device is composed of press rods, a press rod arm and an extending arm drive mechanism and a linear operating mechanism, and the press rod lifting device is composed of a lifting drive mechanism and a lifting operation mechanism. When the tail portion of a plastic bag is placed on the folding plate, the press rod lifting device lifts the press rods, then the press rod extending device enables the press rods to extend towards the middle, and the press rod lifting device enables the press rods to descend and press a preset folding line position at the tail portion of the plastic bag. After that, the folding plate is folded, the tail portion of the plastic bag is folded, and the two press rods are extracted out to finish the tail portion folding. The tail portion folding device is simple in structure, simplified in program, little in occupied time and order in folding, and the folded tail portion is flat and elegant.

Description

technical field [0001] The invention relates to a plastic bag processing device. Background technique [0002] The plastic bags commonly used in people's daily life are all processed by bag making machines. Every time the bag making machine produces a certain number of plastic bags, it is automatically stacked into a stack. Each stack of plastic bags must be folded horizontally many times, folded into long strips, and then bundled up to facilitate storage, transportation, sales and use. Before, the folding and binding of plastic bags were done manually. The applicant has applied for several patents such as "Automatic Folding and Binding Machine for Plastic Bags" Patent No.: 201110081121; "Tail Folding Device for Fully Automatic Folding and Binding Machine for Plastic Bags" Patent No.: 201120108382. Although the plastic bags can be automatically folded and bundled, there are several problems when folding the tail of the plastic bag: First, after the country issued the "plas...

AI Technical Summary

Problems solved by technology

Although the plastic bags can be automatically folded and bundled, there are several problems when folding the tail of the plastic bag: First, after the country issued the "plastic restriction order", the thickness of the plastic bag was required to be increased to more than 0.025 mm, which is more than 0.025 mm. Previous ultra-thin plastic bags are 2 to 3 times thicker

When folding the tail of a thicker national standard plastic bag, it is easy to rebound and not easy to fold because of its high elasticity

The barely folded plastic bags are not neat, of different sizes, not square, and not beautiful

Second, although the "tail folding device of a fully automatic folding and binding machine for plastic bags" that was applied for and published in this book can solve the problem of "rebound" to a certain extent, it has a complex structure, many working procedures, and takes up too much time. , to prolong the working cycle of the whole folding and strapping

Unable to adapt to the bag making machine that is constantly increasing in speed, the efficiency is low

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