CN210594543U

CN210594543U - System tension control device and system bag machine for bag machine

Info

Publication number: CN210594543U
Application number: CN201921144723.3U
Authority: CN
Inventors: 王剑
Original assignee: Shanghai Zhoutai Light Industry Machinery Manufacturing Co ltd
Current assignee: Shanghai Zhoutai Light Industry Machinery Manufacturing Co ltd
Priority date: 2019-07-20
Filing date: 2019-07-20
Publication date: 2020-05-22
Anticipated expiration: 2029-07-20

Abstract

The utility model discloses a tension control device for a bag making machine, which is arranged between a feeding device and an interval conveying device; the tension control device at least comprises a movable roller, a supporting rack of the roller, a driving device for controlling the movement of the roller and a load cell for feeding back pressure information in the conveying process of the packaging bag film; the roller is positioned between the feeding device and the interval conveying device of the membrane material; the shaft of the roller is arranged on the supporting frame and moves on the supporting frame; the driving device is connected with the roller and drives the moving speed of the roller; the load cell is arranged on the moving path of the membrane material, and the load cell is in signal connection with the driving device. The control action of the technology is stable, the control precision is high, the dragging stroke is large, the stability is reliable, the technology can adapt to the tension control of a bag making machine with the maximum dragging stroke (dragging at one time) exceeding more than one meter, the deviation on the subsequent station process is not generated, the rejection rate is reduced, and the processing efficiency is improved.

Description

System tension control device and system bag machine for bag machine

Technical Field

The utility model relates to a wrapping bag processing machinery field especially relates to a control wrapping bag film tension's system in wrapping bag course of working to and utilize the system bag machine of the device control wrapping bag film.

Background

The packaging bag is a bag for packaging various articles, so that goods are convenient to transport and easy to store in a production flow process, and the packaging bag is widely applied to daily life and industrial production. The bag needs to be ironed several times during the processing, and then the ironed portion must be cooled by a cooling device, and in addition, other processes such as forming a square base, longitudinal welding, marking, punching, round-corner punching, etc. are required, which means that the production line for processing the bag can reach a considerable length.

When the packaging bag is processed, the inevitable steps are that the film material of the packaging bag is continuously conveyed to a processing station; the realization of the step needs to be continuously completed by a conveying rubber roller and a driver. When the packaging bag film is conveyed, continuous conveying and interval conveying are usually carried out, and some operations are required to be carried out in continuous movement with the film, such as longitudinal folding and buckle plate forming; some operations must be performed with intermittent motion of the film material, such as welding, punching, marking, etc., and with intermittent motion (start and stop) of the film, i.e., forward motion of the film and its stop, to perform the above operations.

In order to switch the film transport from continuous mode to intermittent mode, it is conventional to use a pair of motorized drums (feeding calenders) operating in continuous mode, one or more compensation rolls, one or more pairs of motorized drums (transport calenders) with intermittent motion; the function of the compensation rollers is, among other things, to convey the material during the phases in which the film is continuously conveyed and to accumulate the material when arriving from the feeding calender during the working phases in which the film is kept still. In order to keep the film completely taut during the various stages of processing, two or more transport calenders are usually arranged at intervals in sequence, interposed with the various accessories with which the machine is equipped, placed after the compensation rollers in order to interrupt the long length of film, thus keeping it always under suitable tension. In order to tension the material during the continuous transport of the film material and during the operations performed on it, it is generally achieved using a combination of a cylinder driving a rocker with a force proportional to the pressure of the air fed into the same piston, and thus pushing a roller. However, the pressure is not kept constant, during the phase of continuous delivery, the air of the cylinder is compressed, and during the phase of stopping, during which, upon arrival, the roller must recover the film, the pressure tending to drop; this is because the feeding of the roller does not succeed in quickly compensating for the rapid movement of the roller.

This variation in pressure results in a variation in the tension applied to the film as it is output from the roll; machines of considerable length (working in sequence), this variation in tension causing slight slippage on the film delivery calender after the roll; this slippage means that subsequent sequential operations are not performed at the same or specific locations on the film, and therefore the operator must manually correct the slippage so that subsequent operations can be performed at the same or specific locations on the film. In addition, in the starting and stopping stages of the bag making machine, the speed of conveying the film material is changed, so that errors caused by variable slippage are changed, a large number of unqualified products are generated, the production efficiency is reduced, and the waste of resources is caused.

Accordingly, those skilled in the art have endeavored to develop a tension control device for a bag making machine to solve the above problems.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned defect of prior art, the utility model aims to solve the technical problem that a tension control device for system bag machine is provided to solve the uneven problem that causes of tension control in wrapping bag transportation process.

In order to solve the above problems, the present invention provides a tension control device for a bag making machine, wherein the bag making machine at least comprises a feeding device for continuously and uninterruptedly conveying a packaging bag film material and an interval conveying device for interval conveying the packaging bag film material to perform each specific process operation, the tension control device is arranged between the feeding device and the interval conveying device, and is used for keeping constant tension on the packaging bag film material when the continuous and uninterruptedly movement of the packaging bag film material is changed into intermittent movement; the tension control device at least comprises a movable balance wheel, a support frame of the balance wheel, a driving device for controlling the movement of the balance wheel and a load cell for feeding back pressure information in the conveying process of a packaging bag film; wherein the balance wheel is positioned between the feeding device and the interval conveying device of the membrane material and controls the tension of the membrane material; the balance wheel axle is arranged on the supporting frame and moves on the supporting frame; the driving device is connected with the balance wheel and drives the moving speed of the balance wheel; the load cell is arranged on a moving path of the membrane material, acquires the pressure of the membrane material in the conveying process, is in signal connection with the driving device, transmits the acquired pressure of the membrane material to the driving device, and controls the moving speed of the balance wheel according to the acquired signal.

Further, the support frame at least comprises a frame body, a linear guide rail and a ball bearing assembly, wherein the frame body is an integral support component of the device, the linear guide rail is installed above the frame body, the ball bearing assembly is installed on the linear guide rail, the balance wheel shaft is installed on the ball bearing assembly, and the movement on the linear guide rail is realized through the ball bearing assembly.

Furthermore, the frame body at two ends of the linear guide rail is provided with a stop block, and the distance between the two stop blocks is the maximum moving stroke of the balance wheel.

Further, the bottom of the ball bearing assembly is connected with a tooth-shaped bracket.

Furthermore, the driving device at least comprises a servo motor, a synchronous belt, a toothed belt and a toothed belt wheel; the toothed belt is provided with a toothed structure, the toothed structure is meshed with a tooth form on the toothed bracket, and the ball bearing assembly is constrained on the toothed belt through the toothed bracket; the two ends of the toothed belt are provided with the toothed belt wheels, the toothed belt wheel at any end is also connected with the synchronous belt, and the toothed belt wheel is connected with the servo motor through the synchronous belt; the servo motor drives the synchronous belt to drive the toothed belt wheel to rotate, so that the toothed belt drives the ball bearing assembly to move, and the balance wheel moves along the linear guide rail.

Further, the load cell includes a tension sensor disposed at an arbitrary position of the film transport path; the tension sensor is in signal connection with the servo motor and transmits the tension value of the film material; adjusting the torque on the servo motor based on the tension measured by the tension controller to vary the motion of the system to maintain a constant tension on the shrink film: when the tension is reduced, more torque is provided, and when the tension is increased, less torque is provided.

Further, the film passes at least one idler roller before the feeding device delivers to the balance wheel.

Further, the driving device can also comprise a rodless cylinder, a toothed belt and a toothed belt wheel; the toothed belt is provided with a toothed structure, the toothed structure is meshed with a tooth form on the toothed bracket, and the ball bearing assembly is constrained on the toothed belt through the toothed bracket; the two ends of the toothed belt are provided with the toothed belt wheels, and the piston of the rodless cylinder is connected with the toothed belt wheel at any end and used as a thrust unit to push the toothed belt wheel to rotate so as to drive the ball bearing assembly to move along the linear guide rail.

Further, the load cell comprises a linear potentiometer, and the linear potentiometer is arranged at any position of the film material transmission path; the linear potentiometer is in signal connection with the rodless cylinder and used as a membrane material discharging speed control unit to obtain and control the voltage of the rodless cylinder, control the moving speed of a piston of the rodless cylinder and further control the tension of the membrane material.

Further, the moving speed of the balance wheel is the difference value of the moving speeds of the feeding device and the interval conveying device.

The utility model also provides a system bag machine, this system bag machine last incessant feed arrangement and the interval of carrying the wrapping bag membrane material carry on between the interval conveyor of each concrete process operation and be provided with aforementioned tension control device.

Through implementing the aforesaid the utility model provides a tension control device and system bag machine for system bag machine has following technological effect: the tension control of the technology is realized by two modes, one is that a servo motor and a tension sensor are used for controlling, and a linear guide rail, a synchronous belt and a synchronous belt wheel are used as a guide path and a stroke path for an action stroke; the system is controlled by a rodless cylinder and a linear potentiometer, the action stroke adopts a linear guide rail, a synchronous belt and a synchronous belt pulley as a guide and stroke path, the rodless cylinder is used as a thrust unit in tension control, and the linear potentiometer is used as a discharging speed control unit; in addition, deviation on subsequent station processes is not generated, rejection rate is reduced, and machining efficiency is improved.

Drawings

The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings, so as to fully understand the objects, the features and the effects of the present invention.

Fig. 1 is a schematic structural view of a servo motor as a tension control device in embodiment 1 of the present invention;

FIG. 2 is a top view of FIG. 1;

fig. 3 is a schematic structural view of a rodless cylinder as a tension control device in embodiment 2 of the present invention;

FIG. 4 is a top view of FIG. 3;

in the figure:

1. a feeding device; 10. film material;

20. a balance wheel; 200. a balance shaft; 21. a conveying roller; (22, 23), idle rollers;

30. a support frame; 31. a linear guide rail; 32. a ball bearing assembly; 33. a stopper; 34. a toothed bracket; 35. a toothed belt; (36, 37), toothed pulley;

40. a servo motor; 41. a synchronous belt; 42. a tension sensor;

50. a rodless cylinder; 51. a linear potentiometer.

The direction indicated by the unidirectional arrow in the figure is the moving direction of the membrane material; the direction indicated by the double arrow is the balance movement direction.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The technical solution of the present invention will be described in detail with reference to the following examples.

Example 1

As shown in fig. 1 and 2, a tension control device for a bag making machine is provided, wherein the bag making machine at least comprises a feeding device 1 for continuously and uninterruptedly conveying a packaging bag film 10 and a spaced conveying device for spaced conveying the packaging bag film 10 for each specific process operation, and the feeding device 1 and the spaced conveying device are both conventional device structures; the tension control device is arranged between the feeding device 1 and the interval conveying device and is used for keeping the tension on the film material 10 of the packaging bag constant when the film material 10 of the packaging bag changes from continuous uninterrupted motion to intermittent motion.

The tension control device comprises at least one movable balance wheel 20, a support frame 30, a driving device and a load cell; wherein, the balance wheel 20 is positioned between the feeding device 1 and the interval conveying device of the membrane material 10 and controls the tension of the membrane material 10; the support frame 30 at least comprises a frame body, a linear guide rail 31 and a ball bearing assembly 32, wherein the frame body is an integral support component of the device, the linear guide rail 31 is arranged above the frame body, the ball bearing assembly 32 is arranged on the linear guide rail 31, and the bottom of the ball bearing assembly 32 is connected with a tooth-shaped bracket 34; both ends of the balance shaft 200 are mounted on the ball bearing assemblies 32, and the movement on the linear guide rail 31 is realized through the ball bearing assemblies 32; stoppers 33 are respectively provided on the holders at both ends of the linear guide 31, and the distance between the stoppers 33 is the maximum stroke of the movement of the balance 20.

The driving device at least comprises a servo motor 40, a synchronous belt 41, a toothed belt 35 and toothed belt wheels (36, 37); the two toothed belts 35 are respectively positioned on two sides of the supporting rack 30, and have tooth-shaped structures thereon, the tooth-shaped structures are meshed with the tooth shapes on the tooth-shaped brackets 34, and the ball bearing assembly 32 is constrained on two sides of the toothed belts 35 through the tooth-shaped brackets 34; two ends of the toothed belt 35 are respectively provided with a toothed belt wheel (36, 37), the toothed belt wheels (36, 37) at any end (as shown, the toothed belt wheels 37) are also connected with a synchronous belt 41, and the toothed belt wheels (36, 37) are connected with a servo motor 40 through the synchronous belt 41; the servo motor 40 drives the timing belt 41 to drive the toothed pulleys (36, 37) to rotate, so that the toothed belt 35 drives the ball bearing assembly 32 to move, and the balance 20 moves along the linear guide rail 31.

The load cell includes a tension sensor 42, the tension sensor 42 is provided at an arbitrary position of the film 10 conveyance path, as shown in the figure, on one of the conveyance rollers 21 near the balance 20; the tension sensor 42 is in signal connection with the servo motor 40, transmits the tension value of the film 10, and uses a PID regulator to perform closed loop control. The torque on the servo motor 40 is adjusted to vary the motion of the system to maintain a constant tension on the shrink film 10, based on the tension measured by the tension controller: when the tension is reduced, more torque is provided, and when the tension is increased, less torque is provided.

As shown, the film 10 passes over at least one idler roller, two idler rollers (22, 23) as shown, before the feeder 1 is fed to the balance 20.

It should be noted that the moving speed of the balance 20 is the difference between the moving speeds of the feeding device 1 and the interval conveyor.

Example 2

As shown in fig. 3 and 4, a tension control device for a bag making machine is provided, wherein the bag making machine at least comprises a feeding device 1 for continuously and uninterruptedly conveying a packaging bag film 10 and a spaced conveying device for spaced conveying the packaging bag film 10 for each specific process operation, and the feeding device 1 and the spaced conveying device are both conventional device structures; the tension control device is arranged between the feeding device 1 and the interval conveying device and is used for keeping the tension on the film material 10 of the packaging bag constant when the film material 10 of the packaging bag changes from continuous uninterrupted motion to intermittent motion.

The driving device at least comprises a rodless cylinder 50, a toothed belt 35 and toothed pulleys (36, 37); the two toothed belts 35 are respectively positioned on two sides of the supporting rack 30, and have tooth-shaped structures thereon, the tooth-shaped structures are meshed with the tooth shapes on the tooth-shaped brackets 34, and the ball bearing assembly 32 is constrained on two sides of the toothed belts 35 through the tooth-shaped brackets 34; two ends of the toothed belt 35 are respectively provided with a toothed belt wheel (36, 37), and a piston of the rodless cylinder 50 is connected with the toothed belt wheel (36, 37) (as shown in the figure, the toothed belt wheel 36)) at any end and used as a thrust unit to push the toothed belt wheel (36, 37) to rotate so as to drive the ball bearing assembly 32 to move along the linear guide rail 31.

The load cell includes a linear potentiometer 51, and the linear potentiometer 51 is arranged at any position of the film material 10 transmission path; the linear potentiometer 51 is in signal connection with the rodless cylinder 50 and is used as a discharging speed control unit of the membrane material 10, the voltage of the rodless cylinder 50 is obtained and controlled, the moving speed of a piston of the rodless cylinder 50 is controlled, and the tension of the membrane material 10 is indirectly controlled.

It should be added that unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which the invention belongs. The terms "connected" or "coupled" and the like as used in the description and the claims of the present application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "end", "side", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object to be described is changed, the relative positional relationships are changed accordingly.

Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any uses or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.

It is to be understood that the present invention is not limited to the structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A tension control device for a bag making machine, wherein the bag making machine at least comprises a feeding device for continuously and uninterruptedly conveying a packaging bag film material and an interval conveying device for interval conveying the packaging bag film material to perform each specific process operation, and is characterized in that the tension control device is arranged between the feeding device and the interval conveying device; the tension control device at least comprises a movable balance wheel, a support frame of the balance wheel, a driving device for controlling the movement of the balance wheel and a load cell for feeding back pressure information in the conveying process of a packaging bag film;

wherein the balance wheel is located between the feeding device and the spacing and conveying device of the membrane material; the balance wheel shaft is arranged on the supporting frame and moves on the supporting frame; the driving device is connected with the balance wheel and drives the moving speed of the balance wheel; the load cell is arranged on a moving path of the membrane material, and the load cell is in signal connection with the driving device.

2. The tension control device according to claim 1, wherein the support frame comprises at least a frame body, a linear guide rail and a ball bearing assembly, wherein the frame body is an integral support member of the device, the linear guide rail is mounted above the frame body, the ball bearing assembly is mounted on the linear guide rail, and a toothed bracket is connected to the bottom of the ball bearing assembly; the balance staff is mounted on the ball bearing assembly.

3. The tension control device of claim 2, wherein stops are provided on the frame at each end of the linear guide, the distance between the stops being the maximum travel of the balance.

4. A tension control device as claimed in claim 3, wherein the drive means comprises at least a servo motor, a timing belt, a toothed belt and a toothed pulley; the toothed belt is provided with a toothed structure, the toothed structure is meshed with a tooth form on the toothed bracket, and the ball bearing assembly is constrained on the toothed belt through the toothed bracket; the two ends of the toothed belt are provided with the toothed belt wheels, the toothed belt wheel at any end is further connected with the synchronous belt, and the toothed belt wheel is connected with the servo motor through the synchronous belt.

5. The tension control device according to claim 4, wherein the load cell includes a tension sensor provided at an arbitrary position of the film transport path; and the tension sensor is in signal connection with the servo motor.

6. The tension control device of claim 3, wherein the drive means further comprises a rodless cylinder, a toothed belt, and a toothed pulley; the toothed belt is provided with a toothed structure, the toothed structure is meshed with a tooth form on the toothed bracket, and the ball bearing assembly is constrained on the toothed belt through the toothed bracket; the two ends of the toothed belt are provided with the toothed belt wheels, and the piston of the rodless cylinder is connected with the toothed belt wheel at any end.

7. The tension control device according to claim 6, wherein the load cell includes a linear potentiometer provided at an arbitrary position of the film transport path; and the linear potentiometer is in signal connection with the rodless cylinder.

8. The tension control device of claim 1, wherein the film passes over at least one idler roller before the feed device feeds into the balance.

9. The tension control device of claim 1, wherein the wobbler moves at a speed that is a difference between the speeds at which the feeding device and the gap filler move.

10. A bag making machine, characterized in that a tension control device as claimed in any one of claims 1 to 9 is provided between a feeding device for continuously and uninterruptedly conveying a packaging bag film and a spacing conveying device for spacing and conveying the packaging bag film for each specific process operation.