Binding machine for binding plastic bag with rubber band

Abstract

The invention discloses a binding machine for binding a plastic bag with a rubber band. The binding machine comprises a machine frame, a vibration disc device and a plastic bag feeding mechanism, andis characterized in that a material taking opening is further formed in the vibration disc device; a rubber band opening device is further arranged at a position corresponding to the material taking opening and comprises a first opening rod, a swing opening rod and a bottom side opening rod; the first opening rod and the swing opening rod are connected with opening air cylinders; and the machine frame is further provided with an inserting movement mechanism. The binding machine has the beneficial effects that compared with the prior art, a rubber band transferring mechanism and a rib removingmechanism can be omitted, so that the structure of the whole machine is simple and compact; the working procedure of the rubber band opening device is simplified; and the binding work is stable and reliable.

Description

technical field [0001] The invention relates to a binding machine for binding plastic bags with rubber bands, in particular to a plastic bag binding machine for binding folded plastic bags with annular rubber bands as binding ropes. Background technique [0002] The plastic bags automatically produced by the bag making machine, in order to facilitate storage, sales and use, these plastic bags need to be folded into strips several times, and then tied with a ring rubber band in the middle of the folded strips of plastic bags , and then enter the market. [0003] Authorized notification number CN208070086U discloses an automatic strapping machine (hereinafter referred to as reference document 1), which mainly includes: a main material feeding mechanism, an auxiliary material feeding mechanism, and a strapping mechanism. Its binding mechanism includes a spreader and a manipulator. Application publication number CN108773518A discloses an "automatic binding device for plastic b...

AI Technical Summary

Problems solved by technology

The problem is: first, after the manipulator grabs the rubber band, the rubber band will sag, and the sagging of the rubber band will cause the inner diameter of the originally round rubber band to become elliptical, which is not conducive to the simultaneous insertion of four struts. The success rate is small, which seriously affects the working stability of the machine; the second is that the rubber band is easy to shake and shake during the process of being grasped and transferred by the manipulator, and it takes a long time to stabilize

The existing problem is that when the two pins of the horizontal stretching mechanism stretch the rubber band horizontally, the length of the circumference of the rubber band will be equally divided into upper and lower sections at the positions of the two pins, because the rubber band has a higher Elasticity, when the relative position of the two pins remains unchanged, when the upper rubber band (two pins) is tightened or pulled, only the upper rubber band can be tightened, while the lower rubber band Because the resistance of the two pins cannot be tightened, this phenomenon is generally called "not walking the rope".

When the two supporting rubber bands described in the comparative document 4 hold up the upper part of the rubber band upwards, although a trapezoid can be formed to be placed on the plastic bag, it can only tighten the upper part of the two pins. This makes the lower part of the rubber band looser and the upper part of the rubber band is too tight and easy to break

That is to say: the stretching and transposition of the rubber band in the comparative document 4 includes a horizontal stretching mechanism and a vertical stretching mechanism. The two rubber bands clamping your hands can only stretch the upper part of your rubber band, the lower part of the rubber band cannot be stretched tightly, but the upper part of the rubber band is easy to break if it is too tight, and it is precisely because of this way of supporting the elastic The degree is different, so it is difficult for this strapping machine to adapt to the market

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