A bag mouth shaping and sealing device for a packaging bag

Abstract

The application discloses a packaging bag mouth shaping and sealing device, which comprises a mounting piece, an elastic piece, a driving mechanism, a sealing mechanism and a shaping mechanism; the first sliding seat and the second sliding seat are slidably arranged on the mounting piece in sequence, the first sliding seat is connected with the second sliding seat through the elastic piece, and the driving mechanism is used for driving the second sliding seat to slide; the shaping mechanism comprises a shaping groove, and the shaping groove is arranged on the first sliding seat; the sealing mechanism comprises a heating strip, a rubber strip, a lever and a guide groove, the rubber strip is fixedly arranged on the first sliding seat, the heating strip is slidably arranged relative to the rubber strip, a sealing groove is formed between the heating strip and the rubber strip, and the sealing groove is arranged opposite to the shaping groove; the guide groove is arranged on the second sliding seat, one end of the lever is slidably arranged in the guide groove, the other end of the lever is fixed with the heating strip, and the guide groove is arc-shaped so that when the second sliding seat approaches the first sliding seat, the heating strip is driven to approach the rubber strip through the lever. The device can simultaneously complete the shaping and sealing actions through one-time driving, and is beneficial to realizing continuous and high-speed production.

Description

TECHNICAL FIELD

[0001] The present application relates to the packaging technical field, and particularly to a packaging bag mouth shaping and sealing device. BACKGROUND

[0002] Many products before leaving the factory, will use packaging bags for packaging, such as bagged medicine, bagged tea, etc. In the production process, these bagged products need to be sealed after filling, and because the bag opening is stretched and irregular during filling, if directly heat sealed, the bag opening is prone to wrinkles, resulting in poor heat sealing effect and unattractive sealing, so it is necessary to shape the bag opening before sealing.

[0003] In the prior art, in the automatic packaging equipment with bag opening shaping function, the shaping mechanism and the sealing mechanism are generally independently arranged, for example, the packaging bag opening clamping, shaping and heat sealing device disclosed in Chinese utility model patent CN202221361048.1 clamps and fixes the bag opening of the packaging bag through the clamping assembly, and then realizes the shaping of the bag opening of the packaging bag through the flattening assembly and the pressing assembly. After shaping, the bag opening is heat sealed through the heat sealing assembly. This independent arrangement of the shaping mechanism and the sealing mechanism is still relatively complex in process, and the control of the shaping mechanism and the sealing mechanism is complicated. At the same time, the complex action process will also affect the production rhythm, which is not conducive to continuous high-speed production. In addition, the shaping method of clamping and pulling the bag opening in the prior art has a complex structure and occupies a large space, and is usually only suitable for single-row packaging bag filling production form. SUMMARY

[0004] The present application aims to overcome the shortcomings of the prior art and provide a packaging bag mouth shaping and sealing device.

[0005] The purpose of the present application is achieved by the following technical solutions:

[0006] The application discloses a packaging bag mouth shaping and sealing device, which comprises a mounting piece, an elastic piece, a driving mechanism, a sealing mechanism and a shaping mechanism; the first sliding seat and the second sliding seat are sequentially and slidably arranged on the mounting piece; the sliding directions of the first sliding seat and the second sliding seat are the same; the first sliding seat is connected with the second sliding seat through the elastic piece; the driving mechanism is used for driving the second sliding seat to slide; the shaping mechanism comprises a shaping groove which is fixedly arranged on the first sliding seat and arranged along the sliding direction of the first sliding seat; the shaping groove is open at the end far from the second sliding seat; the sealing mechanism comprises a heating strip, a rubber strip, a lever and a guide groove; the heating strip is slidably arranged on the first sliding seat; the sliding direction of the heating strip is perpendicular to the sliding direction of the first sliding seat; the rubber strip is fixedly arranged on the first sliding seat; the heating strip is arranged opposite to the rubber strip; the sealing groove is formed between the heating strip and the rubber strip and arranged opposite to the shaping groove; the guide groove is arranged on the second sliding seat; one end of the lever is slidably arranged in the guide groove; the other end of the lever is fixedly connected with the heating strip; the guide groove is arc-shaped so that when the second sliding seat approaches the first sliding seat, the heating strip is driven to approach the rubber strip through the lever.

[0007] Further, the mounting piece is fixedly provided with a limiting stop, a first position sensor and a second position sensor; the limiting stop is matched with the first sliding seat; the first position sensor and the second position sensor are matched with the second sliding seat.

[0008] Further, the two sides of the open end of the shaping groove are provided with a pair of photoelectric switches.

[0009] Further, the open end of the shaping groove is further provided with an eight-shaped opening guide part.

[0010] Further, the upper portion of the guide part is provided with a bag mouth guide plate; one end of the bag mouth guide plate is fixedly connected with the first sliding seat.

[0011] Specifically, the mounting piece comprises a top sealing fixed plate; two parallel translational optical axes are fixedly arranged on the top sealing fixed plate; the two ends of the first sliding seat are respectively slidably connected with the two translational optical axes through linear bearings; the two ends of the second sliding seat are respectively slidably connected with the two translational optical axes through linear bearings.

[0012] Specifically, the elastic piece comprises a spring and a spring guide rod; one end of the spring guide rod is fixedly connected with the first sliding seat; the other end of the spring guide rod penetrates through the second sliding seat; the spring guide rod is slidably connected with the second sliding seat; the spring is sleeved on the spring guide rod; the two ends of the spring are respectively connected with the first sliding seat and the second sliding seat.

[0013] Specifically, the driving mechanism comprises a stepping motor, a driving pulley, a driven pulley and a belt, the driving pulley and the driven pulley are rotatably arranged on the mounting piece, the driving pulley and the driven pulley are drivingly connected through the belt, the stepping motor is fixedly arranged on the mounting piece, the driving pulley is fixedly sleeved on an output shaft of the stepping motor, and the second sliding seat is fixedly connected with the belt.

[0014] Further, the shaping mechanism and the sealing mechanism are both provided with two, and the two shaping mechanisms and the two sealing mechanisms are both symmetrically arranged along the center line of the first sliding seat.

[0015] Further, the auxiliary shaping mechanism comprises a blocking piece, the blocking piece is movably arranged in the opening end direction of the shaping groove, and the blocking piece is matched with the shaping groove.

[0016] Specifically, the auxiliary shaping mechanism comprises a motor and a swing rod, an output shaft of the motor is fixedly connected with one end of the swing rod, and the blocking piece is fixedly arranged at the other end of the swing rod.

[0017] The present application has the following beneficial effects:

[0018] The packaging bag mouth shaping and sealing device comprises first and second sliding seats arranged in sequence and slidably, the first sliding seat is connected with the second sliding seat through an elastic member, the first sliding seat is provided with a shaping groove, the shaping groove is arranged along the sliding direction of the first sliding seat, and the end of the shaping groove away from the second sliding seat is open; a heating strip is slidably arranged on the first sliding seat and a rubber strip is fixedly arranged, a sealing groove is formed between the heating strip and the rubber strip, and the sealing groove is arranged opposite to the shaping groove; a lever is fixedly connected to the heating strip, an arc-shaped guide groove is formed in the second sliding seat, and the other end of the lever is slidably arranged in the guide groove; when the second sliding seat approaches the first sliding seat, the lever can drive the heating strip to approach the rubber strip. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 FIG. 1 is a structural schematic diagram of the packaging bag mouth shaping and sealing device in a retracted state according to the present application;

[0020] Figure 2 FIG. 2 is a structural schematic diagram of the packaging bag mouth shaping and sealing device when the bag mouth shaping is completed according to the present application;

[0021] Figure 3 FIG. 3 is a structural schematic diagram of the packaging bag mouth shaping and sealing device when the sealing is completed according to the present application;

[0022] Figure 4 FIG. 4 is an assembly structural schematic diagram of the first sliding seat, the shaping mechanism and the sealing mechanism in the packaging bag mouth shaping and sealing device according to the present application;

[0023] Figure 5 FIG. 5 is an assembly structural schematic diagram of the mounting member, the driving mechanism and the second sliding seat in the packaging bag mouth shaping and sealing device according to the present application;

[0024] Figure 6 FIG. 6 is a structural schematic diagram of the first sliding seat in the packaging bag mouth shaping and sealing device according to the present application; Figure 5The back structure diagram shown;

[0025] Figure 7 This is a schematic diagram of the overall structure of a packaging bag opening shaping and sealing device according to the present invention;

[0026] In the figure, 1-first slide, 2-second slide, 3-shaping groove, 4-heating strip, 5-rubber strip, 6-shift lever, 7-guide groove, 8-limit stop, 9-first position sensor, 10-second position sensor, 11-reflection switch, 12-guide part, 13-bag opening guide plate, 14-top seal fixing plate, 15-translational optical axis, 16-spring, 17-spring guide rod, 18-stepping motor, 19-belt, 20-blocking member, 21-rocker arm, 22-motor. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0028] like Figures 1 to 6 As shown, a packaging bag mouth shaping and sealing device includes a mounting part, an elastic part, a driving mechanism, a sealing mechanism and a shaping mechanism.

[0029] The mounting member is slidably provided with a first slide 1 and a second slide 2 in sequence. The sliding directions of the first slide 1 and the second slide 2 are the same. The first slide 1 and the second slide 2 are connected by an elastic member, and the driving mechanism is used to drive the second slide 2 to slide.

[0030] The shaping mechanism includes a shaping groove 3, which is fixedly arranged on the first slide 1. The shaping groove 3 is arranged along the sliding direction of the first slide 1, and the shaping groove 3 is open at one end away from the second slide 2. During implementation, the shaping groove 3 can be directly processed and formed on the first slide 1, or two shaping strips parallel to each other can be installed on the first slide 1 as shown in the figure, and the shaping groove 3 is formed between the two shaping strips.

[0031] The sealing mechanism includes a heating strip 4, a rubber strip 5, a lever 6, and a guide groove 7. The heating strip 4 is slidably mounted on the first slide 1, with the sliding direction of the heating strip 4 being perpendicular to the sliding direction of the first slide 1. The rubber strip 5 is fixedly mounted on the first slide 1, and the heating strip 4 is positioned opposite the rubber strip 5. A sealing groove is formed between the heating strip 4 and the rubber strip 5, and the sealing groove is positioned opposite the shaping groove. The guide groove 7 is mounted on the second slide 2, and one end of the lever 6 is slidably mounted within the guide groove 7, while the other end of the lever 6 is fixedly connected to the heating strip 4. The guide groove 7 is machined into an arcuate groove, so that when the second slide 2 moves toward the first slide 1, the lever 6 can drive the heating strip 4 toward the rubber strip 5.

[0032] The packaging bag mouth shaping and sealing device is installed beside the packaging bag conveying line by the mounting part during use, and one end of the device extends above the conveying line, and the shaping groove 3 is arranged along the opening length direction of the packaging bag at the corresponding position on the conveying line during installation, and the opening end of the shaping groove 3 is opposite to the direction of the packaging bag, and the opening edge of the packaging bag can be clamped into the shaping groove 3 when the first sliding seat 1 slides to the conveying line direction. The working process is as shown in Figures 1 to 3 When the packaging bag shaping and sealing is needed, the conveying line stops running, the second sliding seat 2 is driven to slide to the right by the driving mechanism, and the first sliding seat 1 slides to the right under the pushing of the elastic member, and the opening edge of the packaging bag is clamped into the shaping groove 3 when passing the packaging bag position, and the shaping groove 3 gradually combs the opening edge of the packaging bag in the process of continuous sliding of the first sliding seat 1 (it should be noted that the first sliding seat 1 is not rigidly slid during the combing and shaping process due to the arrangement of the elastic member, and has the effect of flexible oscillation combing), until the first sliding seat 1 slides to the right end of the device and is limited, at this time, the bag mouth shaping is completed; thereafter, the second sliding seat 2 is continuously driven to move to the right by the driving mechanism, the elastic member is compressed, and the second sliding seat 2 approaches the first sliding seat 1, at this time, the pushing rod 6 drives the heating strip 4 to approach the rubber strip 5 under the guidance of the guide groove 7, until the packaging bag mouth is clamped between the heating strip 4 and the rubber strip 5 to complete the sealing; after the sealing is completed, the driving mechanism is reversely operated to drive the second sliding seat 2 to slide to the left, and the first sliding seat 1 moves to the left together under the pulling of the elastic member, and they return to Figure 1 the retracted state shown in the figure, and the conveying line continues to run, thereby completing the shaping and sealing action once.

[0033] It can be seen from the above working process that the whole shaping and sealing action can be continuously completed by continuously driving the second sliding seat 2 to slide to the conveying line direction, and the device can be retracted by reversely driving the second sliding seat 2 after the sealing is completed, which is simple to control and continuous in action, and the production rhythm is more compact, which is beneficial to realize continuous high-speed production. It should be noted that the first sliding seat 1 and the second sliding seat 2 are connected by the elastic member, and the elastic member also plays a buffering role to avoid rigid impact between the second sliding seat 2 and the first sliding seat 1 when interference and blockage occur during high-speed feeding.

[0034] Further, the mounting part is fixedly provided with a limiting stop 8, which is matched with the first sliding seat 1, and when the first sliding seat 1 moves to the right and abuts against the limiting stop 8, the opening edge of the packaging bag is completely clamped into the shaping groove 3 to complete the shaping, and at this time, the limiting stop 8 limits and stops the first sliding seat 1. In specific implementation, the limiting stop 8 can be selected from anti-collision sleeves, anti-collision pads and the like to reduce the rigid impact of the first sliding seat 1 during high-speed production.

[0035] The mounting member is also fixedly provided with a first position sensor 9 and a second position sensor 10, both of which are matched with the second slide 2, and the second slide 2 is sensed by the second position sensor 10 when moving to the Figure 1 retreating position shown, and is sensed by the first position sensor 9 when moving to the position shown in which the heating strip 4 and the glue strip 5 clamp and seal the bag opening of the packaging bag. Figure 3 Through the arrangement of the sensors, position signals can be given, and the feeding speed in the shaping and sealing process can be automatically controlled through the program, so that the continuous production speed is improved. The specific control process is as follows: starting from the Figure 1 retreating state shown, when shaping and sealing is needed, the driving mechanism first drives the second slide 2 to move to the right at a high speed in a manner of a set time or a set step, so that the first slide 1 approaches the position at which the bag opening of the packaging bag is clamped into the opening end of the shaping groove 3; then the driving mechanism is converted into low-speed driving of the second slide 2 to move to the right, until the first position sensor 9 senses and sends out a signal, at which time the aforementioned shaping and sealing action is completed; then the driving mechanism reversely drives the second slide 2 to move to the left at a high speed in a manner of a set time or a set step; after a set time or a set step, if the second position sensor 10 does not sense and send out a signal, the driving mechanism is converted into low-speed driving of the second slide 2 to move to the left for compensation, until the second position sensor 10 senses and sends out a signal, and the driving mechanism stops.

[0036] Further, the opening end of the shaping groove 3 is provided with a pair of opposite-acting switches 11 on both sides, which are used to detect whether the opening end of the packaging bag is clamped into the shaping groove 3, and if the opposite-acting switches 11 do not sense a shielding signal, it proves that the opening end of the packaging bag is still in an open state and has not been clamped into the shaping groove 3.

[0037] Further, the opening end of the shaping groove 3 is also provided with a guide part 12 in the shape of an eight-shaped opening, which can smoothly guide the clamping of the opening end of the packaging bag into the shaping groove 3.

[0038] Further, the upper side of the guide part 12 is provided with a bag opening guide plate 13, one end of which is fixedly connected with the first slide 1 and moves together with the first slide 1, and when shaping and sealing is performed, the bag opening guide plate 13 can press down the packaging bag that is raised on the conveying line, so as to facilitate the subsequent shaping and sealing action.

[0039] In specific implementation:

[0040] The aforementioned mounting member includes a top sealing fixed plate 14, and two parallel translation optical shafts 15 are fixedly arranged on the top sealing fixed plate 14, both ends of the first slide 1 are respectively slidably connected with the two translation optical shafts 15 through linear bearings, and both ends of the second slide 2 are respectively slidably connected with the two translation optical shafts 15 through linear bearings.

[0041] The elastic member includes a spring 16 and a spring guide rod 17, one end of the spring guide rod 17 is fixedly connected with the first sliding base 1, the other end of the spring guide rod 17 passes through the second sliding base 2, the spring guide rod 17 is in sliding connection with the second sliding base 2, the spring 16 is sleeved on the spring guide rod 17, and two ends of the spring 16 are fixedly connected with the first sliding base 1 and the second sliding base 2 respectively.

[0042] The driving mechanism includes a stepping motor 18, a driving pulley, a driven pulley and a belt 19, the driving pulley and the driven pulley are rotatably arranged on the mounting member, the driving pulley and the driven pulley are in transmission connection through the belt 19, the stepping motor 18 is fixedly arranged on the mounting member, the driving pulley is fixedly sleeved on an output shaft of the stepping motor 18, the second sliding base 2 is fixedly connected with the belt 19, and the second sliding base 2 can slide left and right through the belt 19 by forward and reverse rotation of the stepping motor 18.

[0043] Further, the aforementioned shaping mechanism and sealing mechanism are both provided with two, the two shaping mechanisms and the two sealing mechanisms are symmetrically arranged along the center line of the first sliding base 1, so that the shaping and sealing of two packaging bags can be simultaneously completed in one action, and the production efficiency is further improved. It should be noted that the arrangement of two shaping mechanisms and two sealing mechanisms is only a preferred embodiment suitable for simultaneous conveying, shaping and sealing of double-row packaging bags, and it should be understood that, since the transverse (perpendicular to the sliding direction of the first sliding base 1) dimensions of the shaping mechanism and the sealing mechanism are relatively small, if necessary, several can be arranged side by side to meet the needs of simultaneous filling, conveying, shaping and sealing of multiple rows of packaging bags, thereby improving the production efficiency.

[0044] As shown in Figure 7 In implementation, an auxiliary shaping mechanism is further provided, the auxiliary shaping mechanism includes a blocking piece 20, the blocking piece 20 is movably arranged in the opening end direction of the shaping groove 3, the blocking piece 20 is matched with the shaping groove 3, when the first sliding base 1 slides to the right to complete the aforementioned shaping process, the blocking piece 20 moves to the other side of the packaging bag away from the shaping groove 3 to block and position the packaging bag, so that the shaping groove 3 can smoothly complete the grooming and shaping of the opening edge of the packaging bag during the movement of the first sliding base 1 to the right. In specific implementation, if a plurality of shaping mechanisms and sealing mechanisms are provided, a plurality of blocking grooves can be formed on the aforementioned blocking piece 20 according to needs, and each blocking groove can correspond to each shaping groove 3, so as to simultaneously assist in completing the shaping action of multiple rows of packaging bags.

[0045] The blocking piece 20 can be controlled in various driving modes. When the package bag needs to be shaped, the blocking piece 20 is controlled to move to the other side of the package bag to block; when the package bag needs to be conveyed, the blocking piece 20 is pushed away to avoid position jam. In the embodiment, the auxiliary shaping mechanism includes a motor 22 and a swing rod 21. The output shaft of the motor 22 is fixedly connected with one end of the swing rod 21, and the blocking piece 20 is fixedly arranged at the other end of the swing rod 21. The motor 22 is reversely rotated by a certain angle to drive the swing rod 21 to swing, and then drive the blocking piece 20 to enter or exit the shaping position.

[0046] The above description is only the preferred embodiment of the present application. It should be understood that the present application is not limited to the forms disclosed herein, and should not be considered as excluding other embodiments. It can be used in various other combinations, modifications and environments, and can be modified within the scope of the concepts described herein by the above teachings or related art or knowledge. Any modification and change made by those skilled in the art without departing from the spirit and scope of the present application shall be within the protection scope of the appended claims of the present application.

Claims

1. A bag mouth shaping and sealing device for a packaging bag, characterized by comprising: The mounting piece, the elastic piece, the driving mechanism, the sealing mechanism and the shaping mechanism are included. The first sliding seat and the second sliding seat are sequentially and slidably arranged on the mounting piece, the sliding directions of the first sliding seat and the second sliding seat are the same, the first sliding seat is connected with the second sliding seat through the elastic piece, and the driving mechanism is used for driving the second sliding seat to slide. The shaping mechanism includes a shaping groove, the shaping groove is fixedly arranged on the first sliding seat, the shaping groove is arranged along the sliding direction of the first sliding seat, and an opening end of the shaping groove is away from the second sliding seat. The sealing mechanism includes a heating strip, a rubber strip, a lever and a guide groove, the heating strip is slidably arranged on the first sliding seat, the sliding direction of the heating strip is perpendicular to the sliding direction of the first sliding seat, the rubber strip is fixedly arranged on the first sliding seat, the heating strip is arranged opposite to the rubber strip, a sealing groove is formed between the heating strip and the rubber strip, and the sealing groove is arranged opposite to the shaping groove. The guide groove is arranged on the second sliding seat, one end of the lever is slidably arranged in the guide groove, the other end of the lever is fixedly connected with the heating strip, and the guide groove is in an arc shape, so that when the second sliding seat approaches the first sliding seat, the heating strip is driven to approach the rubber strip through the lever.

2. A device for sealing and shaping the mouth of a bag according to claim 1, characterized in that The mounting piece is fixedly provided with a limiting stop, a first position sensor and a second position sensor, the limiting stop is matched with the first sliding seat, and the first position sensor and the second position sensor are matched with the second sliding seat.

3. The device according to claim 1, wherein The opening end of the shaping groove is provided with a pair of photoelectric switches on both sides.

4. The device according to claim 1, wherein The opening end of the shaping groove is further provided with a guide part in the shape of an eight-character opening.

5. A device for sealing and shaping the mouth of a bag according to claim 4, characterized in that A bag opening guide plate is arranged above the guide part, and one end of the bag opening guide plate is fixedly connected with the first sliding seat.

6. The device according to claim 1, wherein The mounting piece includes a top sealing fixed plate, two parallel translation optical axes are fixedly arranged on the top sealing fixed plate, the two ends of the first sliding seat are respectively connected with the two translation optical axes through linear bearings, and the two ends of the second sliding seat are respectively connected with the two translation optical axes through linear bearings.

7. The device according to claim 1, wherein The elastic piece includes a spring and a spring guide rod, one end of the spring guide rod is fixedly connected with the first sliding seat, the other end of the spring guide rod penetrates through the second sliding seat, the spring guide rod is slidably connected with the second sliding seat, the spring is sleeved on the spring guide rod, and the two ends of the spring are respectively connected with the first sliding seat and the second sliding seat.

8. The device according to claim 1, wherein The driving mechanism includes a stepping motor, a driving pulley, a driven pulley and a belt, the driving pulley and the driven pulley are rotatably arranged on the mounting piece, the driving pulley and the driven pulley are drivingly connected through the belt, the stepping motor is fixedly arranged on the mounting piece, the driving pulley is fixedly sleeved on the output shaft of the stepping motor, and the second sliding seat is fixedly connected with the belt.

9. A device for sealing the mouth of a bag according to any one of claims 1 to 8, characterised in that, The shaping mechanism and the sealing mechanism are both provided with two, and the two shaping mechanisms and the two sealing mechanisms are symmetrically arranged along the center line of the first sliding seat.

10. A device for sealing the mouth of a bag according to any one of claims 1 to 8, wherein The auxiliary shaping mechanism comprises a blocking piece movably arranged in the opening end direction of the shaping groove, and the blocking piece is matched with the shaping groove.

11. A device for sealing the mouth of a bag according to claim 10, wherein The auxiliary shaping mechanism comprises a motor and a swing rod, the output shaft of the motor is fixedly connected with one end of the swing rod, and the blocking piece is fixedly arranged at the other end of the swing rod.

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