WO2021003933A1

WO2021003933A1 - Plastic film packaging machine

Info

Publication number: WO2021003933A1
Application number: PCT/CN2019/118206
Authority: WO
Inventors: 张小艺; 刘鹏; 张贻弓; 吴耀华; 蒋霞; 沈长鹏
Original assignee: 兰剑智能科技股份有限公司
Priority date: 2019-07-09
Filing date: 2019-11-13
Publication date: 2021-01-14
Also published as: CN110217416A

Abstract

A plastic film packaging machine, relating to the technical field of packaging equipment. The plastic film packaging machine comprises a film supplying mechanism (1), a feeding mechanism (2), and a bag-making mechanism (3) disposed on a support frame (6). The film supplying mechanism is used to convey a plastic film downward. The feeding mechanism is located below the film supplying mechanism and is used to stretch the plastic film. The bag-making mechanism is located below the feeding mechanism, and is used to seal a side opening of the plastic film, and to cut the plastic film and seal an opening formed at the cutting location in the plastic film. The bag-making mechanism comprises a drive component (31), an elastic component (32), a heat-sealing knife (33), and a backing plate (34). The elastic component is disposed between the drive component and the heat-sealing knife, and/or between the drive component and the backing plate. The invention alleviates the technical problem in the prior art in which hot-sealing performed by a plastic film packaging machine results in openings of a plastic film being unevenly hot-sealed, and results in poor sealing stability and an unsightly appearance.

Description

Plastic film baler

Cross references to related applications

This application claims the priority of the Chinese patent application filed with the Chinese Patent Office on July 9, 2019, with the application number 2019106187071, titled "Plastic Film Packing Machine", the entire content of which is incorporated into this application by reference.

Technical field

The present disclosure relates to the technical field of packaging equipment, and in particular to a plastic film packaging machine.

Background technique

Plastic film packing machine is a kind of equipment used to wrap materials or boxes filled with materials. Its specific working principle is: the plastic film drawn from the plastic film roll is folded in half from the center through the film forming mechanism to form The folded shape is closed on one side and opened on the other side. The folded plastic film is driven by the film feeding mechanism to sequentially descend to the feeding mechanism, the bag making mechanism and the traction mechanism; among them, after the feeding is completed, the bag making mechanism is able to adjust the plastic film. The side opening is closed, and at the same time, the cutting of the upper part of the plastic film and the sealing of the two openings formed after the cutting are completed, completing the closure of the object, and also completing the sealing of the lower part of the upper plastic film, which facilitates subsequent continuity Plastic film packaging work.

In the prior art, the bag-making mechanism uses a heat-sealing knife and a backing plate to approach each other and squeeze the plastic film, and at the same time heat the plastic film by the heat-sealing knife to complete the melting and sealing operation of the plastic film. In order to avoid the excessive pressing force between the heat-sealing knife and the backing plate causing the heat seal to be crushed, a flexible material is generally set at the butt position of the heat-sealing knife or backing plate, and the elastic deformation of the flexible material ensures the sealing of the opening effect. However, the irregular deformation of the flexible material during heat sealing will result in uneven heat sealing of the plastic film, which will result in different sealing effects at each sealing position of the opening, poor stability and not beautiful enough.

Summary of the invention

One of the objectives of the present disclosure is to provide a plastic film baler to alleviate the unevenness of the heat seal, poor sealing stability, and unsightly after the plastic film baler in the prior art heat-seals the opening of the plastic film. technical problem.

The present disclosure provides a plastic film packing machine, including a film supply mechanism, a feeding mechanism, and a bag making mechanism installed on a support;

The film feeding mechanism is configured to convey the plastic film downwards, the feeding mechanism is located below the film feeding mechanism and configured to expand the plastic film, and the bag making mechanism is located below the feeding mechanism and can be closed The side opening of the plastic film and the opening formed by cutting and closing the cutting position of the plastic film;

The bag-making mechanism includes a drive assembly, an elastic assembly, a heat-sealing knife, and a backing plate. The elastic assembly is arranged between the drive assembly and the heat-sealing knife, and/or the elastic assembly is arranged at the Between the drive assembly and the backing plate.

Optionally, a hard material is provided at the docking position of the heat-sealing knife and the backing plate.

Optionally, the drive assembly includes a first cylinder, a first swing arm, a second swing arm, a first vertical plate, a second vertical plate, a first short link, a second short link, and a long link;

The first cylinder is mounted on the bracket and the moving end is pivotally connected to the first swing arm, the first swing arm and the second swing arm are both pivotally connected to the bracket, the first The lower ends of the vertical plate and the second vertical plate are pivotally connected to the bracket, the two ends of the first short link are respectively pivotally connected to the first swing arm and the first vertical plate, and the first Both ends of the two short links are pivotally connected to the second swing arm and the second vertical plate, respectively, and both ends of the long link are pivotally connected to the first swing arm and the second swing arm, respectively .

Optionally, the first vertical plate is connected to the backing plate through the elastic component, and the second vertical plate is connected to the heat-sealing knife through the elastic component; wherein, the first swing arm is Driven by the first air cylinder to rotate, the first swing arm drives the second swing arm to rotate through the long link, and the first vertical plate rotates through the first short link; The second swing arm drives the second vertical plate to rotate through the second short link; the rotation directions of the first swing arm and the second swing arm are opposite, and the first vertical plate and the first vertical plate rotate in opposite directions. The rotation direction of the two vertical plates is opposite;

The backing plate and the heat-sealing knife are respectively close to or far away from each other under the driving of the first vertical plate and the second vertical plate.

Optionally, the elastic component includes a plurality of springs and a plurality of guide rods respectively corresponding to the plurality of springs, and the first vertical plate and the second vertical plate are both provided with guide holes; the guide rod One end is fixed on the heat-sealing knife or the backing plate, the other end can pass through the guide hole and is threadedly connected with the nut, and the spring is sleeved on the guide rod.

Optionally, the plurality of guide rods include a plurality of first guide rods and a plurality of second guide rods; wherein:

One ends of the plurality of first guide rods are fixed to the backing plate at intervals, and the other ends respectively pass through different guide holes on the first vertical plate and are threadedly connected with nuts, and the first guide rods are sleeved The spring is located between the backing plate and the first vertical plate;

One ends of the plurality of second guide rods are fixed to the heat-sealing knife at intervals, and the other ends respectively pass through different guide holes on the second vertical plate and are threadedly connected with nuts, and the second guide rods are sleeved The provided spring is located between the heat-sealing knife and the second vertical plate.

Optionally, a temperature sensor is provided on the heat-sealing knife, and the temperature sensor is configured to detect the temperature of the heat-sealing knife.

Optionally, the feeding mechanism includes a sliding rail and a first limit plate and a second limit plate arranged oppositely, the sliding rail is installed on a bracket, the first limit plate and the second limit plate The board is slidably mounted on the slide rail.

Optionally, the opposite side of the first limiting plate and the second limiting plate is provided with a first sensor, and the first sensor is configured to detect whether the feeding mechanism has completed feeding.

Optionally, the plastic film packing machine further includes a controller electrically connected with the first sensor and the bag making mechanism;

The first sensor is configured to detect whether there is material between the first limiting plate and the second limiting plate when the feeding mechanism starts to feed, if no material is detected within a preset time period, then Determining that the feeding mechanism completes feeding, and sending a trigger signal to the controller;

The controller is configured to control the bag making mechanism to make bags according to the trigger signal.

Optionally, the film supply mechanism includes a motor, a rubber covering roller and a driven film feeding roller, the motor is installed on the bracket, and the rubber covering roller and the driven film feeding roller are pivotally connected to On the support, the motor is drivingly connected with the rubber covering roller.

Optionally, the rubber covering roller and the driven film feeding roller are configured to compress the plastic film located between them, and generate rolling friction under the drive of the motor, so as to draw the plastic film from the plastic film reel. Film and transport the drawn plastic film down to the feeding mechanism.

Optionally, the plastic film baler further includes a traction mechanism, the traction mechanism includes a clamping jaw cylinder, a vertical second cylinder, and a horizontal third cylinder, the second cylinder being installed on the bracket And the moving end is fixedly connected with the cylinder of the third cylinder, and the moving end of the third cylinder is fixedly connected with the cylinder of the gripper cylinder, and the gripper on the gripper cylinder can clamp the plastic The lower part of the membrane.

Optionally, the position of the gripper cylinder changes with the movement of the moving end of the third cylinder, and the position of the gripper cylinder corresponds to the width of the plastic film, so that the gripper cylinder is basically located at the The side openings of the plastic film.

Optionally, the plastic film packaging machine further includes a labeling mechanism capable of attaching a label to the plastic film between the film supply mechanism and the feeding mechanism.

Optionally, the support includes a feeding port configured to feed materials to the feeding mechanism, and a second sensor capable of detecting whether feeding is completed is provided at the feeding port.

Description of the drawings

In order to more clearly describe the specific embodiments of the present disclosure or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the specific embodiments or the description of the prior art. Obviously, the appendix in the following description The drawings are some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings may be obtained based on these drawings without creative work.

Figure 1 is a schematic diagram of the structure of a plastic film baler provided by the present disclosure;

Figure 2 is an enlarged view A in Figure 1;

Figure 3 is an enlarged view B in Figure 1;

4 is a schematic structural diagram of the bag making mechanism in the plastic film packing machine provided by the present disclosure;

Fig. 5 is a schematic structural diagram of the traction mechanism in the plastic film baler provided by the present disclosure.

Icon: 1- film feeding mechanism; 2- feeding mechanism; 3- bag-making mechanism; 4- traction mechanism; 5- labeling mechanism; 6-bracket; 11-motor; 12- rubber-coated roller; 13- driven delivery Film roller; 21-slide rail; 22-first limit plate; 23-second limit plate; 24-first sensor; 31-drive assembly; 32-elastic assembly; 33-heat-sealing knife; 34-backing plate ; 35-temperature sensor; 41-second cylinder; 42-third cylinder; 43-gripper cylinder; 61-second sensor; 311-first cylinder; 312-first swing arm; 313-second swing arm; 314-first vertical plate; 315-second vertical plate; 316-first short link; 317-second short link; 318-long link; 321-spring; 322-guide rod.

Detailed ways

The technical solutions of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present disclosure.

In the description of the present disclosure, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present disclosure and simplifying the description, and does not indicate or imply that the pointed device or element must have a specific orientation or a specific orientation. The structure and operation cannot therefore be construed as limiting the present disclosure. In addition, the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance.

In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be interpreted broadly. For example, they can be fixed or detachable. Connected or integrally connected; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components. For those of ordinary skill in the art, the specific meaning of the above-mentioned terms in the present disclosure can be understood in specific situations.

As shown in FIGS. 1 to 5, the present disclosure provides a plastic film packing machine, which includes a film supply mechanism 1, a feeding mechanism 2 and a bag making mechanism 3 mounted on a bracket 6. Among them, the film feeding mechanism 1 is configured to convey the plastic film downward, the feeding mechanism 2 is located below the film feeding mechanism 1 and configured to expand the plastic film, and the bag making mechanism 3 is located below the feeding mechanism 2 and can close the side of the plastic film. Part openings, cut the plastic film, and close the opening formed by the cut position of the plastic film.

The bag making mechanism 3 includes a drive assembly 31, an elastic assembly 32, a heat-sealing knife 33, and a backing plate 34. The elastic assembly 32 is arranged between the drive assembly 31 and the heat-sealing knife 33, and/or the elastic assembly 32 is arranged at the drive assembly 31. And the backing plate 34.

In detail, the plastic film packing machine provided by the present disclosure includes a film supply mechanism 1, a feeding mechanism 2 and a bag making mechanism 3. The film supply mechanism 1 conveys the folded two layers of plastic film downward, and the folded One side of the two layers of plastic film is closed, and the other side is open. The feeding mechanism 2 located in the film feeding mechanism 1 spreads the folded two layers of plastic film, so that people can feed between the two layers of plastic film. After the feeding is completed, the plastic film after feeding is conveyed down to the bag making mechanism 3. The bag mechanism 3 closes the side opening of the plastic film and closes and cuts the upper opening of the plastic film.

Specifically, in the bag-making operation, the heat-sealing knife 33 and the backing plate 34 are separately arranged on both sides of the two layers of plastic film, and correspond to the side openings and upper openings of the plastic film. Under the driving of the driving assembly 31, the heat sealing The knife 33 and the backing plate 34 are close to each other until the two layers of plastic film are squeezed. At this time, as the driving assembly 31 continues to push, the elastic component 32 is compressed and the elastic force generated is the heat-sealing knife 33 and the backing plate 34. The interaction force between the heat-sealing knife 33 and the backing plate 34 can be controlled by controlling the elastic deformation of the elastic component 32, which can relieve the butt of the heat-sealing knife 33 and the backing plate 34 to a certain extent. The irregular deformation of the flexible material at the position reduces the degree of unevenness after heat sealing at the docking position, thereby improving the heat sealing effect of the plastic film opening.

In order to further improve the heat sealing effect on the plastic film opening, the butting position of the heat sealing knife 33 and the backing plate 34 can be set to a hard material to buffer the pressing force between the heat sealing knife 33 and the backing plate 34. Due to the small deformation of the hard material during heat sealing, after both the heat sealing knife 33 and the backing plate 34 heat-seal the plastic film opening, the formed edge thickness is uniform, the sealing effect of each position is basically the same, and the sealing stability is high. Also more beautiful.

It is worth noting that in this embodiment, the elastic component 32 may be provided only between the driving component 31 and the heat-sealing knife 33, or only the elastic component 32 may be provided between the driving component 31 and the backing plate 34. This embodiment preferably simultaneously Including the above two situations, the two sets of elastic components 32 are symmetrically arranged with each other, so that the interaction force between the heat-sealing knife 33 and the backing plate 34 can be better controlled.

In addition, as shown in FIG. 4, in this embodiment, the heat-sealing knife 33 includes a horizontal heat-sealing knife and a vertical heat-sealing knife whose ends are fixedly connected. Accordingly, the backing plate 34 includes a horizontal backing plate and a horizontal backing plate whose ends are fixedly connected. Vertical pad. Wherein, the side of the horizontal heat sealing knife opposite to the horizontal backing plate is a heat cover, and the heat cover is provided with a horizontal groove, and the horizontal groove substantially bisects the heat cover of the horizontal heat sealing knife. The side of the horizontal backing plate opposite to the horizontal heat-sealing knife, that is, the side of the horizontal backing plate facing the hot cover of the horizontal heat-sealing knife is provided with a horizontal toothed knife, and the setting position of the horizontal toothed knife corresponds to the horizontal groove, so that After the horizontal heat-sealing knife is squeezed with the horizontal backing plate under the drive of the driving assembly, the horizontal toothed knife can be inserted into the horizontal groove to complete the cutting of the plastic film. Since the horizontal groove bisects the hot cover of the horizontal heat-sealing knife, the horizontal toothed knife inserted into the horizontal groove also basically bisects the hot cover. At the same time, the hot cover located below the horizontal toothed knife completes the plastic film containing the material The heat sealing of the upper opening, the heat cover located above the horizontal toothed knife completes the heat sealing of the lower opening of the upper plastic film.

Specifically, this embodiment also introduces the specific structure of the plastic film packing machine in detail as follows.

First, as shown in FIG. 4, in this embodiment, the drive assembly 31 includes a first cylinder 311, a first swing arm 312, a second swing arm 313, a first vertical plate 314, a second vertical plate 315, and a first short link. The rod 316, the second short link 317, and the long link 318.

Wherein, the first swing arm 312 and the second swing arm 313 are arranged oppositely and are pivotally connected to the bracket 6. The first vertical plate 314 and the second vertical plate 315 are arranged opposite to each other, and their lower ends are pivotally connected to the bracket 6 respectively. Both ends of the first short link 316 are pivotally connected to the first swing arm 312 and the first vertical plate 314, and both ends of the second short link 317 are pivotally connected to the second swing arm 313 and the second vertical plate 315, respectively. Both ends of the long link 318 are pivotally connected to the first swing arm 312 and the second swing arm 313 respectively.

In detail, both the first swing arm 312 and the second swing arm 313 include a rotating shaft and a first link and a second link fixedly arranged on the rotating shaft. In this case, the first swing arm 312 and the second swing arm 313 are respectively pivotally connected to the bracket 6 through their respective rotating shafts, and one end of the first short link 316 is pivotally connected to the first link of the first swing arm 312 , The other end is pivotally connected to the first vertical plate 314; one end of the second short link 317 is pivotally connected to the first link of the second swing arm 313, and the other end is pivotally connected to the second vertical plate 315. The second link of the first swing arm 312 is pivotally connected to one end of the long link 318, the second link of the second swing arm 313 is pivoted to the other end of the long link 318, and the first air cylinder 311 is mounted on the bracket 6. And the moving end is pivotally connected with the second link of the first swing arm 312.

In this embodiment, the first air cylinder 311 is configured to drive the first swing arm 312 to rotate during operation. Driven by the long link 318, the second swing arm 313 and the first swing arm 312 rotate at the same time, and the rotation directions of the two are opposite. . At this time, the first vertical plate 314 is driven by the first short link 316 to rotate around the lower end pivot point, the second vertical plate 315 is driven by the second short link 317 to rotate around the lower end pivot point, and the first The rotation directions of the vertical plate 314 and the second vertical plate 315 are opposite. In other words, through the first short link 316 and the second short link 317, the first vertical plate 314 and the second vertical plate 315 can be close to and away from each other, and the heat-sealing knife 33 and the backing plate 34 can be moved close to and away from each other. .

Optionally, the elastic component 32 includes a plurality of springs 321 and a plurality of guide rods 322 corresponding to the plurality of springs 321 respectively. The number of the guide rods 322 is the same as the number of the springs 321, and the guide rods 322 correspond to the springs 321 one to one. One end of the guide rod 322 is fixed on the heat-sealing knife 33 or the backing plate 34. The first vertical plate 314 and the second vertical plate 315 are provided with guide holes. The other end of the guide rod 322 can pass through the guide hole and be screwed with the nut. The spring 321 Sleeve on the guide rod 322.

Specifically, the aforementioned plurality of guide rods 322 may include a plurality of first guide rods and a plurality of second guide rods. Wherein, one end of the plurality of first guide rods is fixed to the side of the backing plate 34 facing the heat-sealing knife 33 at intervals, the other end of each first guide rod is provided with a threaded hole, and the plurality of first The other ends of the guide rods respectively pass through different guide holes of the first vertical plate 314 and are fixedly connected with the nut. The nut restricts the first guide rod from coming out of the guide hole to complete the connection of the backing plate 34 and the first vertical plate 314.

One end of the plurality of second guide rods is fixed at intervals on the side of the heat-sealing knife 33 facing the backing plate 34, the other end of each second guide rod is provided with a threaded hole, and the other end of the plurality of second guide rods One end respectively passes through different guide holes of the second vertical plate 315 and is fixedly connected with the nut. The nut restricts the second guide rod from coming out of the guide hole, completing the connection of the heat-sealing knife 33 and the second vertical plate 315.

The spring 321 is sleeved on the guide rod 322. In detail, a spring 321 is sleeved on each first guide rod, and the spring 321 is located between the backing plate 34 and the first vertical plate 314. A spring 321 is sleeved on each second guide rod, and the spring 321 is located between the heat-sealing knife 33 and the second vertical plate 315. The spring 321 is in a compressed state at all times. When the first vertical plate 314 and the second vertical plate 315 move closer to each other, the heat-sealing knife 33 and the backing plate 34 come into contact in sequence from bottom to top. Under the buffer of the spring 321, the heat can be finally completed. The parallel state of the sealing knife 33 and the backing plate 34, that is, the interaction force at each position of the heat sealing knife 33 and the backing plate 34 is the same, which ensures the stability of the heat sealing.

As shown in FIG. 4, this embodiment can also be provided with a temperature sensor 35 on the heat-sealing knife 33. The temperature sensor 35 is a screw-type temperature sensor 35, which can monitor the temperature of the heat-sealing knife 33 in real time to ensure that the heat-sealing knife 33 The floating range of the temperature does not exceed 5℃, which further ensures the stability of heat sealing.

Further, please refer to FIG. 2 again. In this embodiment, the feeding mechanism 2 includes a sliding rail 21 and a first limiting plate 22 and a second limiting plate 23 arranged oppositely. The sliding rail 21 is installed on the bracket 6, and the first The limiting plate 22 and the second limiting plate 23 are slidably mounted on the slide rail 21.

Specifically, the first limiting plate 22 and the second limiting plate 23 are arranged parallel to each other, and the two can be adjusted by sliding on the slide rail 21 to complete the distance between the two to correspond to the thickness of different materials at all times.

At this time, this embodiment is also provided with a first sensor 24 configured to detect whether the feeding is completed on the opposite side of the first limiting plate 22 and the second limiting plate 23.

Specifically, when the material is poured into the folded plastic film below from the gap between the first limit plate 22 and the second limit plate 23, the first sensor 24 can sense and give a signal to the controller, and the controller then controls the controller. The bag mechanism 3 works to complete the heat-sealing packaging of the folded plastic film. Or, when the material is light, when the material is put into the folded plastic film below, the upper end of the material may still be located between the first limit plate 22 and the second limit plate 23 due to the friction between the material and the plastic film. At this time, the first sensor 24 can sense and give a signal to the controller. The bag-making mechanism 3 does not perform bag-making work. The bag-making mechanism 3 will not continue until the staff finds and pushes the material completely into the folded plastic film. Work to avoid the occurrence of materials being heat sealed.

In one example, the first sensor 24 can detect whether there is material between the first limit plate 22 and the second limit plate 23 every time the feeding mechanism 2 starts feeding, if no material is detected within the preset time period , It can be determined that the feeding mechanism 2 has completed the feeding, and sends a trigger signal to the controller, and the controller receives the trigger signal to control the bag making mechanism 3 to make bags. In this way, it is possible to avoid the above-mentioned material being heat sealed. Wherein, the preset duration can be set according to the working conditions of the feeding mechanism 2, for example, it can be 25 seconds to 35 seconds.

In this embodiment, as shown in Figure 3, the film supply mechanism 1 may include a motor 11, a rubber covering roller 12, and a driven film feeding roller 13. The motor 11 is installed on the bracket 6, and the rubber covering roller 12 and the driven feeding roller 13 The film roller 13 is pivotally connected to the support 6, and the motor 11 is drivingly connected with the rubber-coated roller 12.

The covering roller 12 and the driven film feeding roller 13 are configured to compress the plastic film between them. After the motor 11 works, the plastic film and the covering roller 12 will have rolling friction, which provides that the plastic film gradually changes from the plastic film. The roll is drawn out and goes down to the power of the feeding mechanism 2.

On the basis of the above, as shown in Figure 5, the plastic film baler provided in this embodiment may also include a traction mechanism 4, which includes a clamping jaw cylinder 43, a vertical second cylinder 41, and a horizontal third cylinder. The cylinder 42 and the second cylinder 41 are mounted on the bracket 6 and the moving end is fixedly connected with the cylinder of the third cylinder 42. The moving end of the third cylinder 42 is fixedly connected with the cylinder of the clamping jaw cylinder 43. The jaws can clamp the lower part of the plastic film.

Specifically, while the film supply mechanism 1 is working, the clamping jaws of the clamping jaw cylinder 43 clamp the plastic film, and the second cylinder 41 also works at the same time to ensure the overall downward movement of the plastic film. In this embodiment, the position of the gripper cylinder 43 changes with the movement of the moving end of the third cylinder 42. For plastic films of different widths, the position of the gripper cylinder 43 can be adjusted by the third cylinder 42 so that the gripper cylinder 43 The jaws are close to the side opening of the plastic film. In this way, when the bag-making mechanism 3 is working, the clamping jaws can maintain the state of clamping the plastic film, thereby ensuring that the side opening of the plastic film will not be too large, and facilitating the heat sealing of the side opening of the plastic film.

Further, as shown in FIG. 1, this embodiment may further include a labeling mechanism 5, and the labeling mechanism 5 can attach a label to the plastic film between the film feeding mechanism 1 and the feeding mechanism 2.

Specifically, when the film feeding mechanism 1 and the traction mechanism 4 pull the plastic film below the feeding mechanism 2, the labeling mechanism 5 will paste the label information of the material to be sealed and stored on the outside of the part of the plastic film.

As a further improvement of this embodiment, the bracket 6 further includes a feeding port configured to feed the feeding mechanism 2, and a second sensor 61 capable of detecting whether feeding is completed is provided at the feeding port.

Specifically, the staff feeds materials between the first limit plate 22 and the second limit plate 23 through the feed port. When the staff’s arm extends into the rack through the feed port, the second sensor 61 senses and gives the controller Signals to ensure that the bag-making mechanism 3 cannot work, and to avoid the sudden operation of the bag-making mechanism 3 when the hand is located in the folded plastic film below the feeding mechanism 2, which may cause pinching or burns.

In summary, in the plastic film packaging machine provided by the present disclosure, the heat sealing knife and the backing plate of the bag making mechanism are separately arranged on both sides of the two layers of plastic film and correspond to the side openings and the upper opening of the two layers of plastic film. An elastic component is arranged between the driving component and the heat-sealing knife, and/or an elastic component is arranged between the driving component and the backing plate. When the driving assembly drives the heat-sealing knife and the backing plate to approach each other to squeeze the two layers of plastic film, the interaction force between the heat-sealing knife and the backing plate can be controlled by controlling the deformation of the elastic component, so as to ensure the The heat sealing effect of the opening. Further, the butt position of the heat-sealing knife and the backing plate can be set as a hard material. After the two heat-seal the plastic film opening, the formed edge thickness is uniform, the sealing effect of each position is basically the same, and the sealing stability is high. More beautiful.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, not to limit them; although the present disclosure has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand: It is still possible to modify the technical solutions described in the foregoing embodiments, or equivalently replace some or all of the technical features; these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present invention range.

Industrial applicability

The plastic film baler provided by the present disclosure can control the interaction force between the heat sealing knife and the backing plate by controlling the deformation amount of the elastic component, thereby reducing the degree of unevenness of the heat sealing position of the plastic film and improving the heat sealing effect .

Claims

A plastic film packing machine, which is characterized in that it comprises a film supply mechanism, a feeding mechanism and a bag making mechanism installed on a support;

The film feeding mechanism is configured to convey the plastic film downwards, the feeding mechanism is located below the film feeding mechanism and configured to expand the plastic film, and the bag making mechanism is located below the feeding mechanism and can be closed The side opening of the plastic film and the opening formed by cutting and closing the cutting position of the plastic film;

The bag-making mechanism includes a drive assembly, an elastic assembly, a heat-sealing knife, and a backing plate. The elastic assembly is arranged between the drive assembly and the heat-sealing knife, and/or the elastic assembly is arranged at the Between the drive assembly and the backing plate.
The plastic film packing machine according to claim 1, wherein a hard material is provided at the butt position of the heat-sealing knife and the backing plate.
The plastic film packing machine according to claim 1 or 2, wherein the drive assembly includes a first cylinder, a first swing arm, a second swing arm, a first vertical plate, a second vertical plate, a first short Connecting rod, second short connecting rod and long connecting rod;

The first cylinder is mounted on the bracket and the moving end is pivotally connected to the first swing arm, the first swing arm and the second swing arm are both pivotally connected to the bracket, the first The lower ends of the vertical plate and the second vertical plate are pivotally connected to the bracket, the two ends of the first short link are respectively pivotally connected to the first swing arm and the first vertical plate, and the first Both ends of the two short links are pivotally connected to the second swing arm and the second vertical plate, respectively, and both ends of the long link are pivotally connected to the first swing arm and the second swing arm, respectively .
The plastic film packing machine according to claim 3, wherein the first vertical plate is connected to the backing plate through the elastic component, and the second vertical plate is connected to the heat seal through the elastic component. The knife is connected; wherein, the first swing arm is driven by the first cylinder to rotate, the first swing arm drives the second swing arm to rotate through the long link, and the first short The connecting rod drives the first vertical plate to rotate; the second swing arm drives the second vertical plate to rotate through the second short link; the direction of rotation of the first swing arm and the second swing arm On the contrary, the rotation directions of the first vertical plate and the second vertical plate are opposite;

The backing plate and the heat-sealing knife are respectively close to or far away from each other under the driving of the first vertical plate and the second vertical plate.
The plastic film baler according to claim 3 or 4, wherein the elastic component comprises a plurality of springs and a plurality of guide rods corresponding to the plurality of springs, the first vertical plate and the The second vertical plates are provided with guide holes, one end of the guide rod is fixed on the heat-sealing knife or the backing plate, the other end can pass through the guide hole and be screwed with a nut, and the spring is sleeved On the guide rod.
The plastic film packing machine according to claim 5, wherein the plurality of guide rods comprise a plurality of first guide rods and a plurality of second guide rods; wherein:

One ends of the plurality of first guide rods are fixed to the backing plate at intervals, and the other ends respectively pass through different guide holes on the first vertical plate and are threadedly connected with nuts, and the first guide rods are sleeved The spring is located between the backing plate and the first vertical plate;

One ends of the plurality of second guide rods are fixed to the heat-sealing knife at intervals, and the other ends respectively pass through different guide holes on the second vertical plate and are threadedly connected with nuts, and the second guide rods are sleeved The provided spring is located between the heat-sealing knife and the second vertical plate.
The plastic film packaging machine according to any one of claims 1-6, wherein a temperature sensor is provided on the heat-sealing knife, and the temperature sensor is configured to detect the temperature of the heat-sealing knife.
The plastic film packing machine according to any one of claims 1-7, wherein the feeding mechanism comprises a sliding rail and a first limit plate and a second limit plate arranged oppositely, and the sliding rail is installed On the bracket, the first limiting plate and the second limiting plate are slidably mounted on the sliding rail.
The plastic film packing machine according to claim 8, wherein the opposite side of the first limit plate and the second limit plate is provided with a first sensor, and the first sensor is configured to detect the Whether the feeding organization has completed feeding.
The plastic film packaging machine according to claim 9, wherein the plastic film packaging machine further comprises a controller electrically connected with the first sensor and the bag making mechanism;

The first sensor is configured to detect whether there is material between the first limiting plate and the second limiting plate when the feeding mechanism starts to feed, if no material is detected within a preset time period, then Determining that the feeding mechanism completes feeding, and sending a trigger signal to the controller;

The controller is configured to control the bag making mechanism to make bags according to the trigger signal.
The plastic film packing machine according to any one of claims 1-10, wherein the film supply mechanism includes a motor, a rubber coating roller and a driven film feeding roller, and the motor is mounted on the support The rubber covering roller and the driven film feeding roller are pivotally connected to the bracket, and the motor is drivingly connected with the rubber covering roller.
The plastic film packing machine according to claim 11, wherein the rubber covering roller and the driven film feeding roller are configured to compress the plastic film located between them, and are driven by the motor Rolling friction occurs downward to draw plastic film from the plastic film reel and convey the drawn plastic film downward to the feeding mechanism.
The plastic film packing machine according to any one of claims 1-11, further comprising a traction mechanism, the traction mechanism comprising a jaw cylinder, a second cylinder arranged vertically, and a third cylinder arranged horizontally , The second cylinder is installed on the bracket and the moving end is fixedly connected to the cylinder of the third cylinder, the moving end of the third cylinder is fixedly connected to the cylinder of the clamping jaw cylinder, The jaws on the jaw cylinder can clamp the lower part of the plastic film.
The plastic film packing machine according to claim 13, wherein the position of the gripper cylinder changes with the movement of the moving end of the third cylinder, and the position of the gripper cylinder is corresponding to the width of the plastic film. Correspondingly, the clamping jaw cylinder is basically located at the side opening of the plastic film.
The plastic film packing machine according to claim 11 or 12, further comprising a labeling mechanism capable of attaching a label to the plastic film between the film supply mechanism and the feeding mechanism膜上。 The membrane.
The plastic film baler according to any one of claims 1-15, wherein the bracket includes a feeding port configured to feed the feeding mechanism, and the feeding port is provided with a device capable of detecting whether feeding is completed The second sensor.