Head part folding device for plastic bag

Abstract

The invention discloses a head part folding device for a plastic bag. The head part folding device for the plastic bag is applied to a plastic bag folding machine or a plastic bag bundling machine, and is used for folding two lifting handles of the plastic bag and a front part of the plastic bag. The head part folding device includes a machine frame, a folding flap plate, a bag pressing hook, a bag pressing plate, a bag pressing plate driving mechanism, a sliding table and a mark pressing plate, the head part folding device is characterized in that the sliding table is further provided with anadjustable supporting plate mechanism and a U-shaped pushing and folding plate mechanism, wherein the pressing plate is a combined type plate pressing mechanism, and the folding flap plate is furtherprovided with a pushing plate mechanism. The head part folding device has the beneficial effects that compared with the prior art, the amplitude of the movement of the pushing and folding plate to the two sides is reduced, the overall structure of the machine is compact, the two folded lifting handles of the plastic bag can be combined together and are not prone to separating after being bundled,and the adjustment of the adjustable supporting plate mechanism can be adapted to the folding of plastic bags of different width specifications.

Description

technical field [0001] The invention relates to a head folding device for plastic bags. Background technique [0002] The plastic bag involved in the present invention refers to a convenient bag with two handles, also known as a vest bag, which is usually automatically processed and produced by a bag making machine, and the bag making machine will output one or two piles of plastic bags at regular intervals. Bags, generally dozens of them are stacked. In order to facilitate storage, transportation, sale, and use, these stacked plastic bags generally need to be folded three to four times, and finally folded into long strips, and then bundled or packed into packaging bags. The shape of the plastic bag and its folding procedure are as follows: Figure 6 and Figure 7 Shown: The shape of the plastic bag is as Figure 6 As shown, at first the handles 71 of the two plastic bags need to be folded in the middle at the position of the handle folding line 72, so that the two handles...

AI Technical Summary

Problems solved by technology

This causes many problems such as the whole set of equipment is bulky, complex in structure and high in manufacturing cost.

Another problem is: the two handles 71 of the plastic bag must be built together when folded, that is, one handle is pressed on the other to form a Figure 8 In the state shown, when bundling the folded plastic bag, the bundling rope is bound in the middle of the two handles, only in this way can the two handles be bundled at the same time

Although the previous application can carry out width adjustment and make the structure of the machine compact, new problems have appeared at the same time: first, when the two handles of the plastic bag are folded together with the folding flap In the process, in order to prevent the two handles that have been folded together from falling apart, it is necessary to set the bag-pressing hook, and when the folding flap is turned back to 90 degrees, the bag-pressing hook must be released Reset, otherwise it cannot be folded

And the release time of the hook of the pressure bag is difficult to determine. If the release is early, the two handles of the plastic bag will be easy to scatter. chaos

And because of the influence of many factors such as different width specifications, different thicknesses, different numbers, and different materials of plastic bags, there is no specific mode for the reset time of the bag pressing hook, and continuous debugging is required.

Second, when the folding flap folds the head of the plastic bag, although it has the clamping effect of the bag hook and the indentation effect of the creasing plate, it is difficult to form a crease at the folding line of the head of the plastic bag , when the folding flap is released and reset, the head of the folded plastic bag is easy to rebound and lift, which will seriously affect the folding work and folding stability

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