阅读说明：本技术 一种制袋机的动态贮存放卷装置 (Dynamic storage and unwinding device of bag making machine ) 是由 续三军 彭建柳 朱杰 罗慧平 罗佳昌 于 2019-12-13 设计创作，主要内容包括：本发明公开了一种制袋机的动态贮存放卷装置,膜卷和进料辊组之间设有贮料辊组构成的动态贮料机构,膜卷引出的薄膜绕过上、下导引辊呈V型分布；上、下导引辊分别装置在立柱的升降内、外基座上；升降内、外基座分别连接链轮链条传动机构的链条的一侧,链条做回转运动时,升降外基座和升降内基座的运动方向相反。该装置实现了制袋机的不停机换料接料,提高了生产效率,确保了制袋质量,而且简单可靠、易于维护、体积小巧。(The invention discloses a dynamic storage unwinding device of a bag making machine.A dynamic material storage mechanism consisting of a material storage roller set is arranged between a film roll and a feeding roller set, and a film led out by the film roll bypasses an upper guide roller and a lower guide roller and is distributed in a V shape; the upper guide roller and the lower guide roller are respectively arranged on the lifting inner base and the lifting outer base of the upright post; the lifting inner base and the lifting outer base are respectively connected with one side of a chain of the chain wheel and chain transmission mechanism, and when the chain does rotary motion, the moving directions of the lifting outer base and the lifting inner base are opposite. The device realizes the non-stop material changing and receiving of the bag making machine, improves the production efficiency, ensures the bag making quality, and has the advantages of simplicity, reliability, easy maintenance and small volume.)

1. A dynamic storage unwinding device of a bag making machine comprises a film roll and a feeding roller group, and is characterized in that a dynamic material storage mechanism is arranged between the film roll and the feeding roller group, and the dynamic material storage mechanism comprises at least one material storage roller group; the material storage roller group comprises two upper guide rollers at a high position, and a lower guide roller at a low position is arranged between the two upper guide rollers; the film led out by the film roll rounds the upper and lower guide rollers and is distributed in a V shape; two rotating shafts at two ends of the two upper guide rollers are arranged at two ends of the cross arm, the middle part of the cross arm is fixedly connected on a lifting outer base of the upright post, and two rotating shafts at two ends of the lower guide roller are arranged on a lifting inner base of the upright post; the stand is internally provided with a chain wheel and chain transmission mechanism: the lower end chain wheel located at the bottom of the stand column is connected with the servo motor, the upper end chain wheel is located at the top of the stand column, the lifting outer base and the lifting inner base are respectively connected with one side of the chain, and when the chain does rotary motion, the moving directions of the lifting outer base and the lifting inner base are opposite.

2. The dynamic storage unwind apparatus of claim 1 wherein said bag machine has a tachometer for monitoring the speed of film travel, and said control mechanism controls the speed of said servo motor based on signals from said tachometer.

3. The dynamic storage unwinding device of claim 1 or 2 wherein a guide post is provided in the post, and the outer lifting base and the inner lifting base are connected to a slider on the guide post.

4. The dynamic storage unwinding device as claimed in claim 1 or 2, wherein the dynamic storage mechanism comprises 2 to 5 storage roller sets.

5. The dynamic storage unwinding device of claim 3, wherein the dynamic storage mechanism comprises 2 to 5 storage roller sets.

Technical Field

The invention relates to an automatic bag making machine for packaging bags, in particular to an unwinding mechanism.

Background

The bag making machine is an automatic device for making plastic packaging bags with different sizes, thicknesses and specifications. In the operation of the bag making machine, a film roll as a bag making raw material is positioned at the head end of the equipment and is pulled by the equipment. And (4) the film roll unreels the film and enters a feeding roller set of equipment for processing. After the film of the current film roll is completely unreeled, a new film roll needs to be manually replaced (called material replacement), and the tail end of the film of the current film roll and the head end of the film of the new film roll need to be connected (called material receiving) through an adhesive tape.

Disclosure of Invention

In order to solve the above drawbacks, the invention provides an unwinding device for a bag making machine, which does not need to be stopped during a material changing and receiving process. In order to solve the technical problems, the invention adopts the technical scheme that the dynamic storage unwinding device of the bag making machine comprises a film roll and a feeding roller group, and is characterized in that a dynamic storage mechanism is arranged between the film roll and the feeding roller group, and the dynamic storage mechanism comprises at least one storage roller group; the material storage roller group comprises two upper guide rollers at a high position, and a lower guide roller at a low position is arranged between the two upper guide rollers; the film led out by the film roll rounds the upper and lower guide rollers and is distributed in a V shape; two rotating shafts at two ends of the two upper guide rollers are arranged at two ends of the cross arm, the middle part of the cross arm is fixedly connected on a lifting outer base of the upright post, and two rotating shafts at two ends of the lower guide roller are arranged on a lifting inner base of the upright post; the stand is internally provided with a chain wheel and chain transmission mechanism: the lower end chain wheel located at the bottom of the stand column is connected with the servo motor, the upper end chain wheel is located at the top of the stand column, the lifting outer base and the lifting inner base are respectively connected with one side of the chain, and when the chain does rotary motion, the moving directions of the lifting outer base and the lifting inner base are opposite.

By adopting the technical scheme, when the feeding roller group works normally, the film led out by the working film roll bypasses the upper and lower guide rollers and enters the feeding roller group, so that the normal work is not influenced; when material changing and receiving are needed, a servo motor is started, and the two upper guide rollers are driven to descend through the chain wheel and the chain and the lifting inner and outer bases and simultaneously driven to ascend; the thin film on the storage roll group is in V-shaped distribution to supplement feeding so as to keep the tail end of the working film roll not to be torn, and the time is saved for carrying out material receiving and changing work without stopping the machine. Meanwhile, the speed of supplementary feeding of the device is stable and balanced, large fluctuation of film tension is avoided, bag making quality is guaranteed, and the size of equipment is reduced. The upright post which takes the chain wheel and the chain as the transmission well completes the supporting and synchronous reverse driving work, and has the advantages of simplicity, reliability, easy maintenance and small volume.

From the above, the bag making machine has the advantages that the material changing and receiving without stopping the bag making machine are realized, the production efficiency is improved, the bag making quality is ensured, and the bag making machine is simple, reliable, easy to maintain and small in size.

Preferably, the bag making machine is provided with a velocimeter for monitoring the moving speed of the film, and the control mechanism controls the rotating speed of the servo motor according to the signal of the velocimeter. So that the rate of the make-up feed matches the film travel rate.

Preferably, a guide post is arranged in the upright post, and the lifting outer base and the lifting inner base are connected with a slide block on the guide post. The stability of the lifting motion of the upper guide roller and the lower guide roller is ensured.

Preferably, the dynamic material storage mechanism comprises 2-5 material storage roller sets. The usable time of material changing and receiving is prolonged.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Drawings

Fig. 1 is a schematic view of the overall structure principle of an unwinding device according to an embodiment of the present invention (front view, normal operating state);

FIG. 2 is a schematic structural diagram (side view) of a dynamic storage mechanism according to an embodiment of the present invention;

FIG. 3 is a schematic view of the internal structure of the right upright 10 shown in FIG. 2;

fig. 4 is a schematic view of the overall structure principle of the unwinding device according to the embodiment of the present invention (front view, material changing and receiving state).

Detailed Description

Referring to the attached drawings, reflecting a specific structure of the invention, a dynamic material storage mechanism is arranged between a film roll 1 and a feeding roller group 7 of the bag making machine, and comprises a material storage roller group; the storage roller group comprises an upper guide roller 3 and an upper guide roller 6 which are positioned at a high position, and a lower guide roller 9 which is positioned at a low position is arranged between the two upper guide rollers.

The film 2 drawn from the film roll 1 bypasses the upper and lower guide rollers and is distributed in a V shape. Two end rotating shafts 13 of the two upper guide rollers are arranged at two ends of a cross arm 5, the middle part of the cross arm 5 is fixedly connected on a lifting outer base 4 of an upright post 10, and two end rotating shafts 8 of the lower guide roller 9 are arranged on a lifting inner base 15 of the upright post 10.

The column 10 is provided with a chain wheel and chain transmission mechanism: the lower end chain wheel 19 in the electric box 12 positioned at the bottom of the upright post 10 is connected with the servo motor 20, the upper end chain wheel 18 is positioned at the top of the upright post 10, the lifting outer base 4 is connected with the outer side chain 17, the lifting inner base 15 is respectively connected with the inner side chain 16, and when the chains do rotary motion, the lifting outer base 4 and the lifting inner base 15 have opposite lifting motion directions.

The bag making machine is provided with a velocimeter for monitoring the moving speed of the film, and the control mechanism controls the rotating speed of the servo motor 20 according to the signal of the velocimeter. The speed of the supplementary feeding is matched with the moving speed of the film, so that the tension change of the film is avoided, and the bag making quality is not influenced.

By adopting the technical scheme, when the film feeding device works normally, the film 2 led out from the working film roll 1 bypasses the upper and lower guide rollers and enters the feeding roller group 7, so that the normal work is not influenced; when material is required to be changed and received, the servo motor 20 is started, the two upper guide rollers 3 and 6 are driven to descend through the chain wheel and the chain, the inner base and the outer base are lifted, the lower guide roller 9 is driven to ascend, as shown in fig. 3, the V-shaped distributed film on the material storage roller set is changed into a low-peak waveform shown by a solid line 2-2 from a high-peak waveform shown by a dotted line 2-1, and a certain length of film 2 supplementary feeding is output in the period, so that the tail end of the film of the working film roll 1 is kept from being torn, the material is released for time to carry out material receiving and changing work, and the machine does not need to be stopped. The upper and lower guide rollers are simultaneously closed to the middle position, so that the speed of the supplementary feeding is stable and balanced, and the large fluctuation of the tension of the film 2 is avoided.

The above-mentioned implementation is only for clearly illustrating the technical solutions of the present invention, and is not to be construed as limiting the present invention in any way. The present invention has many known alternatives and modifications in the art, which fall within the scope of the present invention without departing from the spirit of the present invention.