Film splicing device, packaging equipment and film splicing method

Abstract

The present invention provides a film splicing device, packaging equipment, and film splicing method. The film splicing device and packaging equipment include a film splicing adsorption platform, a film preparation adsorption platform, a flipping mechanism, a cutting mechanism, and a film splicing judgment mechanism. The flipping mechanism switches the film preparation adsorption plane between a film preparation state and a film splicing state. When the film preparation adsorption plane is in the film preparation state, the film preparation adsorption plane and the film splicing adsorption plane are arranged at an angle. When the film preparation adsorption plane is in the film splicing state, the film preparation adsorption plane and the film splicing adsorption plane are parallel to each other. The cutting mechanism can switch between a cutting state and a first avoidance state. When the film preparation adsorption plane is in the film splicing state, the cutting mechanism is in the first avoidance state. The film splicing device, packaging equipment, and film splicing method provided by the present invention can minimize the waste of raw materials during the production of packaging bags, achieve continuous and efficient production, and reduce production costs.

Description

Technical Field

[0001] The present invention belongs to the technical field of packaging equipment, and in particular relates to a film splicing device, packaging equipment and a film splicing method. Background Art

[0002] Packaging is a crucial step in product production, primarily accomplished through packaging equipment. For products that require packaging bags, semi-finished bags are first formed, then the product is filled into the semi-finished bags, and finally sealed. During the bag-making process, packaging film is the raw material for the bags. This film is typically supplied in rolls and folded into bags after passing through a former. During production, exhausted rolls of film must be frequently replaced with new ones to maintain continuous production. During this replacement process, the tail of the old roll of film must be connected to the head of the new roll.

[0003] Traditional splicing methods typically involve overlapping the end of the old film roll with the beginning of the new film roll. This overlap cannot be used to form a packaging bag and must be discarded. In actual production, this splicing method results in significant waste of packaging film, hindering production costs. Summary of the Invention

[0004] The embodiments of the present invention provide a film splicing device, packaging equipment and a film splicing method, which aim to solve the problem that the existing film splicing method easily causes waste of packaging film.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] In a first aspect, an embodiment of the present invention provides a film bonding device, comprising:

[0007] The film splicing adsorption platform has a film splicing adsorption plane for adsorbing the front packaging film drawn out from the working packaging film roller;

[0008] A film preparation adsorption platform, comprising a film preparation adsorption plane for adsorbing the adhesive layer and the spare packaging film drawn out from the spare packaging film roller;

[0009] a flip mechanism driving the film preparation adsorption platform to swing, so that the film preparation adsorption plane switches between a film preparation state close to the film splicing adsorption plane and a film splicing state away from the film splicing adsorption plane; when the film preparation adsorption plane is in the film preparation state, the film preparation adsorption plane and the film splicing adsorption plane are arranged at an angle; when the film preparation adsorption plane is in the film splicing state, the film preparation adsorption plane and the film splicing adsorption plane are parallel to each other, so that the end edge of the front packaging film and the head edge of the standby packaging film are connected to each other through the adhesive layer;

[0010] a cutting mechanism, arranged corresponding to the film splicing adsorption plane and capable of cutting the pre-packaging film, wherein the cutting mechanism is switchable between a cutting state close to the film splicing adsorption plane and a first avoiding state away from the film splicing adsorption plane; when the film preparation adsorption plane is in the film splicing state, the cutting mechanism is in the first avoiding state;

[0011] The film splicing judgment mechanism is used to judge the remaining state of the front packaging film roll and generate a film splicing instruction.

[0012] In combination with the first aspect, in a possible implementation, the film joining device further includes a translation mechanism, which drives the film joining adsorption platform to move in a direction perpendicular to the film joining adsorption plane, so as to cooperate with the film preparation adsorption platform to extrude the pre-packaging film, the spare packaging film and the adhesive layer when the film preparation adsorption platform is in the film joining state.

[0013] In combination with the first aspect, in a possible implementation, the film splicing judgment mechanism includes a torque detection module, and the torque detection module is provided on the working packaging film roller to obtain the torque of the working packaging film roller.

[0014] In some embodiments, the film splicing judgment mechanism further includes a tension detection module, which is arranged between the working packaging film roller and a tension roller downstream of the working packaging film roller to obtain the tension of the front packaging film between the working packaging film roller and the tension roller.

[0015] In some embodiments, the film splicing judgment mechanism also includes a position detection module, which is arranged on the downstream side of the tension roller downstream of the working packaging film roller, and judges the length of the remaining pre-packaging film upstream of the tension roller by obtaining the mark on the pre-packaging film downstream of the tension roller.

[0016] In combination with the first aspect, in a possible implementation,

[0017] The cutting mechanism and the film preparation adsorption platform are distributed along a preset path, the preset path is parallel to the film connection adsorption plane and perpendicular to the swing axis of the film preparation adsorption platform, the cutting mechanism is integrally connected to the flipping mechanism, and the cutting mechanism can reciprocate along the preset path to switch between a cutting state and a first avoidance state;

[0018] The flipping mechanism includes a guide cam structure, a guide rail and a driving assembly, and the driving assembly can drive the cutting mechanism and the film preparation adsorption platform to move along the preset path. The guide cam structure is connected to the shaft end of the swing shaft, and the guide rail is provided on the frame. The guide cam structure slides with the guide rail and can drive the swing shaft to rotate during the movement of the film preparation adsorption platform along the preset path; when the film preparation adsorption plane is in the film preparation state, the cutting mechanism is facing the film preparation adsorption plane.

[0019] In combination with the first aspect, in a possible implementation, the film bonding device further includes an auxiliary film pressing mechanism, the auxiliary film pressing mechanism including a film pressing rod and a film pressing control assembly, the film pressing control assembly being disposed on a frame, the film pressing rod being parallel to a swing axis of the film preparation adsorption platform;

[0020] The film pressing control assembly drives the film pressing rod to swing around an auxiliary swing axis parallel to the swing axis, so that the film pressing rod switches between a pressing state abutting against the film preparation adsorption plane and a second avoiding state away from the film preparation adsorption plane.

[0021] In some embodiments, the film pressing rod is provided with a plurality of elastic pressing rings, and the elastic pressing rings are used to abut against the spare packaging film.

[0022] When the film is bonded to the packaging film, the adhesive layer is placed between the end of the packaging film and the adhesive layer, and the adhesive layer is pre-bonded to the packaging film. The film bonding judgment mechanism determines that the remaining packaging film is insufficient and generates a film bonding instruction, and then controls the film bonding adsorption platform to adsorb and fix the front packaging film, and cuts the front packaging film through the cutting mechanism. Then, the cutting mechanism is controlled to switch to the first avoidance state, and the flipping mechanism drives the film bonding adsorption platform to switch from the film preparation state to the film bonding state, until the adhesive layer connects the end edge of the front packaging film with the end edge of the spare packaging film, and the width of the gap between the two does not exceed 1 mm. Finally, the flipping mechanism drives the film bonding adsorption platform to switch from the film bonding state to the film preparation state, and releases the adsorption state of the film bonding adsorption platform on the front packaging film, and the film bonding is completed. The present application forms a bonding connection directly between the end edge of the front packaging film and the head edge of the spare packaging film through the adhesive layer. There is no need to set an overlapping overlap portion between the end of the front packaging film and the head end of the spare packaging film, thereby avoiding the problem of packaging film waste caused by the overlapping connection method; at the same time, by reasonably cutting the end of the front packaging film, the connection area between the front packaging film and the spare packaging film forms a coherent packaging pattern, which can be directly used for the production of packaging bags, that is, there can be no waste after the film is connected, thereby minimizing the loss of packaging film.

[0023] In a second aspect, an embodiment of the present invention further provides a packaging device, comprising the above-mentioned film splicing device.

[0024] Compared with the prior art, the solution shown in the embodiment of the present application can minimize the waste of raw materials during the production of packaging bags by adopting the above-mentioned film splicing device, realize continuous and efficient operation of the production process, and reduce production costs.

[0025] In a third aspect, an embodiment of the present invention further provides a film bonding method, which is implemented based on the above-mentioned film bonding device, and the film bonding method includes the following steps:

[0026] S10, placing the head end of the spare packaging film on the spare packaging film roll on the spare film adsorption plane, and fixing the spare packaging film by vacuum adsorption;

[0027] S20, placing an adhesive layer between the head end of the spare packaging film and the spare film adsorption plane, and pre-bonding the adhesive layer to the spare packaging film;

[0028] S30: If the film splicing judgment mechanism determines that the remaining packaging film is insufficient and generates a film splicing instruction, the film splicing adsorption platform is controlled to adsorb and fix the front packaging film, and the cutting mechanism is used to cut the front packaging film;

[0029] S40, controlling the cutting mechanism to switch to the first avoidance state, and driving the film preparation adsorption platform to switch from the film preparation state to the film connection state through the flipping mechanism, until the adhesive layer connects the rear edge of the front packaging film with the front edge of the spare packaging film;

[0030] S50, driving the film preparation adsorption platform to switch from the film splicing state to the film preparation state through the flipping mechanism, and releasing the adsorption state of the film splicing adsorption platform on the front packaging film and the adsorption state of the film preparation adsorption platform on the standby packaging film.

[0031] Compared with the prior art, the solution shown in the embodiment of the present application has an overall simple film splicing method. After accurately determining the remaining length of the pre-packaging film, the film can be effectively spliced to achieve a patchwork connection between the pre-packaging film and the spare packaging film, thereby avoiding the problem of packaging film waste caused by overlapping and lap joints, and effectively reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A front view of the film splicing device provided in Example 1 of the present invention;

[0033] Figure 2 This is a schematic diagram of the assembly of the working packaging film roller and the spare packaging film roller used in the first embodiment of the present invention;

[0034] Figure 3A three-dimensional diagram of the film adsorption platform used in the first embodiment of the present invention;

[0035] Figure 4 Schematic diagram of the assembly of the film preparation adsorption platform and the flip mechanism used in Example 1 of the present invention Figure 1 ;

[0036] Figure 5 Schematic diagram of the assembly of the film preparation adsorption platform and the flip mechanism used in Example 1 of the present invention Figure 2 ;

[0037] Figure 6 This is a schematic diagram of the assembly of the film preparation adsorption platform and the auxiliary film pressing mechanism used in the first embodiment of the present invention;

[0038] Figure 7 for Figure 6 Schematic diagram of the partial structure of the auxiliary film pressing mechanism;

[0039] Figure 8 Schematic diagram of the working state of the film bonding device provided in Example 1 of the present invention Figure 1 ;

[0040] Figure 9 Schematic diagram of the working state of the film bonding device provided in Example 1 of the present invention Figure 2 ;

[0041] Figure 10 Schematic diagram of the adsorption state of the spare film adsorption platform and the spare packaging film used in the first embodiment of the present invention;

[0042] Figure 11 Schematic diagram of the connection state of the front packaging film and the spare packaging film after adopting the film splicing method of the second embodiment of the present invention;

[0043] Figure 12 The relative state of the front packaging film and the film adsorption platform in the film bonding method provided in the third embodiment of the present invention is shown as follows: Figure 1 ;

[0044] Figure 13 The relative state of the front packaging film and the film adsorption platform in the film bonding method provided in the third embodiment of the present invention is shown as follows: Figure 2 ;

[0045] Description of reference numerals:

[0046] 1. Film splicing adsorption platform; 101. Film splicing adsorption plane; 102. Cutting line slot; 2. Film preparation adsorption platform; 201. Film preparation adsorption plane; 202. Slideway; 203. Cutting line slot; 210. Swing axis; 3. Flip mechanism; 310. Guide rail; 311. First guide section; 312. Second guide section; 313. Third guide section; 320. Drive assembly; 330. Swing link; 340. Guide wheel; 4. Cutting mechanism; 410. Cutting bracket; 4101. Gap slot; 420. Cutting driver; 430. Cutter; 5. Film splicing judgment mechanism; 510. Tension detection module; 511. Swing rod; 512 , proximity switch; 513, roller; 520, position detection module; 6, front packaging film; 7, spare packaging film; 8, adhesive layer; 9, adsorption hole; 10, pre-positioning part; 1010, pressure block; 11, film support structure; 1110, brush; 12, translation mechanism; 13, working packaging film roller; 14, tension roller; 15, connecting bracket; 16, auxiliary film pressing mechanism; 1610, film pressing rod; 1620, elastic pressure ring; 1630, guide plate; 1631, arc track; 1640, swing rod; 1650, positioning spring; 1660, handle; 17, posture detector; 18, frame; 19, spare packaging film roller. DETAILED DESCRIPTION

[0047] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0048] In the claims, description and drawings of the present invention, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" is for the purpose of distinguishing different objects rather than for describing a specific order.

[0049] In the claims, specifications and the above-mentioned drawings of the present invention, unless otherwise expressly defined, directional words such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise", "high", "low" and the like indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the specific scope of protection of the present invention.

[0050] In the claims, description and above-mentioned drawings of the present invention, unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" should be understood in a broad sense, that is, any connection method without displacement relationship and relative rotation relationship between the two parties, that is, including non-detachable fixed connection, detachable fixed connection, integral connection and fixed connection through other devices or elements.

[0051] In the claims, description and drawings of the present invention, if the terms "include", "have" and their variations are used, they are intended to mean "including but not limited to".

[0052] Please also refer to Figures 1 to 10 Now, the film bonding device provided by the present invention is described. The film splicing device comprises a film splicing adsorption platform 1, a film preparation adsorption platform 2, a flipping mechanism 3, a cutting mechanism 4 and a film splicing judgment mechanism 5; the film splicing adsorption platform 1 has a film splicing adsorption plane 101 for adsorbing the pre-packaging film 6 drawn out by the working packaging film roller 13; the film preparation adsorption platform 2 has a film preparation adsorption plane 201 for adsorbing the adhesive layer 8 and the spare packaging film 7 drawn out by the spare packaging film roller 19; the flipping mechanism 3 drives the film preparation adsorption platform 2 to swing so that the film preparation adsorption plane 201 switches between a film preparation state close to the film splicing adsorption plane 101 and a film splicing state away from the film splicing adsorption plane 101; when the film preparation adsorption plane 201 is in the film preparation state, the film preparation adsorption plane 201 is set at an angle to the film splicing adsorption plane 101; when the film preparation adsorption plane 201 is in the film splicing state, the film preparation adsorption plane 201 is parallel to the film splicing adsorption plane 101, so that the end edge of the pre-packaging film 6 and the head edge of the spare packaging film 7 are connected with each other through the adhesive layer 8, forming a film splicing state as shown in FIG. Figure 11 The state shown; the cutting mechanism 4 is set corresponding to the film splicing adsorption plane 101, and can cut the pre-packaging film 6, the cutting mechanism 4 can switch between a cutting state close to the adjacent film splicing adsorption plane 101 and a first avoidance state away from the film splicing adsorption plane 101; when the film preparation adsorption plane 201 is in the film splicing state, the cutting mechanism 4 is in the first avoidance state; the film splicing judgment mechanism 5 is used to judge the remaining state of the film roll of the pre-packaging film 6 and generate a film splicing instruction.

[0053] In this embodiment, the film splicing judgment mechanism 5 is respectively connected to the film splicing adsorption platform 1, the standby film adsorption platform 2, the flipping mechanism 3, and the cutting mechanism 4. After determining that the pre-packaging film 6 on the pre-packaging film roll is exhausted, the film splicing judgment mechanism 5 generates a film splicing instruction. The film splicing adsorption platform 1 vacuum-adsorbs and fixes the pre-packaging film 6 according to the film splicing instruction, and then the cutting mechanism 4 cuts the pre-packaging film 6. Subsequently, the flipping mechanism 3 drives the standby film adsorption platform 2, the standby packaging film 7 adsorbed and fixed thereon, and the adhesive layer 8 to flip until the film splicing state is switched to, and the adhesive layer 8 is adhered to the end of the pre-packaging film 6, and the film splicing is completed. Subsequently, the standby film adsorption platform 2 and the film splicing adsorption platform 1 release the vacuum adsorption state, the standby film adsorption platform 2 is reset, and the packaging equipment continues to produce packaging bags. After the film splicing judgment mechanism 5 generates the film splicing instruction, the industrial control computer controls the film splicing adsorption platform 1, the standby film adsorption platform 2, the flipping mechanism 3, and the cutting mechanism 4 to operate in a predetermined sequence according to the film splicing instruction.

[0054] Alternatively, after the film splicing judgment mechanism 5 generates a film splicing instruction, a prompt module (such as a buzzer, a prompt light, etc.) on the packaging equipment generates a sound or light prompt, and the operator can manually trigger a button (or touch screen) provided on the packaging equipment, and the operator can individually control the splicing film adsorption platform 1, the film preparation adsorption platform 2, the flipping mechanism 3 and the cutting mechanism 4.

[0055] In this embodiment, both the film-joining adsorption platform 1 and the film-preparing adsorption platform 2 are provided with adsorption holes 9, and both the film-joining adsorption platform 1 and the film-preparing adsorption platform 2 are provided with vacuum chambers inside, which are connected to external vacuum equipment. Ultimately, by forming a negative pressure inside the vacuum chamber, the adsorption holes 9 can achieve vacuum adsorption and fixation of the pre-packaging film 6 or the spare packaging film 7.

[0056] In this embodiment, the adhesive layer 8 is single-sided adhesive, and its adhesive layer is used to adhere the pre-packaging film 6 and the spare packaging film 7, and its non-adhesive layer is in contact with the spare film adsorption plane 201 and can be fixed on the spare film adsorption plane 201 by vacuum adsorption.

[0057] In this embodiment, the packaging equipment has a frame 18, and the film adsorption platform 1, the film preparation adsorption platform 2, the flipping mechanism 3, the cutting mechanism 4 and the film adsorption judgment mechanism 5 are all integrated on the frame 18 to form an integral structure. The specific configuration of the frame 18 will not be described here, and it is sufficient to meet the assembly and use requirements.

[0058] In this embodiment, the film-joining adsorption plane 101 is exemplarily shown as a vertical plane, and the film preparation adsorption plane 201 is horizontal in the film preparation state and a vertical plane in the film-joining state; of course, the spatial distribution of the film-joining adsorption plane 101 and the film preparation adsorption plane 201 can also be achieved in other ways as long as it can meet the production operation requirements, and no sole limitation is made here.

[0059] Compared with the prior art, the film bonding device provided in this embodiment is Figure 4 In the state shown, the head end of the spare packaging film 7 on the spare packaging film roll 19 is first placed on the spare film adsorption plane 201, and the spare packaging film 7 is fixed by vacuum adsorption, and then the adhesive layer 8 is placed between the head end of the spare packaging film 7 and the said spare film adsorption plane 201, and the adhesive layer 8 is pre-bonded to the spare packaging film 7, and the whole is formed as shown in FIG. Figure 8 The state shown; the film splicing judgment mechanism 5 judges that the remaining packaging film is insufficient and generates a film splicing instruction, then controls the film splicing adsorption platform 1 to adsorb and fix the front packaging film 6, and cuts the front packaging film 6 through the cutting mechanism 4; then controls the cutting mechanism 4 to switch to the first avoidance state, and drives the film preparation adsorption platform 2 to switch from the film preparation state to the film splicing state through the flip mechanism 3, until the adhesive layer 8 connects the end edge of the front packaging film 6 with the head edge of the spare packaging film 7, and the whole is formed as shown. Figure 9 Finally, the flip mechanism 3 drives the film preparation adsorption platform 2 to switch from the film connection state to the film preparation state, and releases the adsorption state of the film connection adsorption platform 1 on the front packaging film 6, and the film connection is completed.

[0060] In this embodiment, the adhesive layer 8 directly forms an adhesive fit between the end edge of the pre-packaging film 6 and the head edge of the spare packaging film 7. There is no need to set an overlapping part between the end of the pre-packaging film 6 and the head end of the spare packaging film 7, thereby avoiding the problem of packaging film waste caused by the overlapping connection method; at the same time, by reasonably cutting the end of the pre-packaging film 6, the connection area between the pre-packaging film 6 and the spare packaging film 7 forms a coherent packaging pattern, which can be directly used for the production of packaging bags, that is, there can be no waste after the film is connected, thereby minimizing the loss of packaging film.

[0061] In some embodiments, see Figure 4 and Figure 5 After the film preparation is completed and the spare packaging film 7 is adsorbed and fixed on the film preparation adsorption platform 2, the restriction of the pre-positioning part 10 on the spare packaging film 7 is released to avoid affecting the subsequent film splicing operation.

[0062] In some more specific embodiments, the pre-positioning member 10 includes two groups of pressure blocks 1010 hinged on the spare film adsorption plane 201, and the two groups of pressure blocks 1010 are symmetrically arranged on both sides of the front packaging film 6, wherein the pressure blocks 1010 are magnetic. After being flipped and pressed on the spare packaging film 7, the pressure blocks 1010 can be magnetically attracted to the spare film adsorption plane 201 and are not easy to bounce off, which can effectively ensure the reliability of the positioning of the front packaging film 6.

[0063] In some other more specific embodiments, the pre-positioning element 10 includes two groups of pressing blocks 1010 inserted on the preparation film adsorption plane 201, and the two groups of pressing blocks 1010 are symmetrically arranged on both sides of the front packaging film 6, and the pressing blocks 1010 are magnetic.

[0064] More specifically, a slideway 202 is provided on the film preparation adsorption platform 2 , and the pre-positioning members 10 are slidably connected within the slideway 202 and can be fixed to a designated position by threaded fasteners, thereby ultimately achieving adjustment of the distance between the two groups of pre-positioning members 10 .

[0065] In some embodiments, see Figures 4 to 7 A cutting line groove 203 is provided on the film preparation adsorption plane 201. After the film preparation adsorption platform 2 adsorbs and fixes the spare packaging film 7, the spare packaging film 7 can be reasonably cut to better connect with the end of the front packaging film 6, so as to form a more coherent packaging pattern after the film is connected.

[0066] In some embodiments of the film adsorption platform 1, see Figure 3 A cutting slot 102 is provided on the film adsorption plane 101. The cutting mechanism 4 includes a cutting bracket 410, a cutting driver 420 and a cutter 430. The main body of the cutting driver 420 is fixed to the cutting bracket 410. The cutting driver 420 has a driving end that can reciprocate along a path parallel to the swing axis 210. The cutter 430 is provided at the driving end and corresponds to the cutting slot 102. The cutter 430 can extend into the cutting slot 102 to cut the front packaging film 6 during the movement.

[0067] More specifically, travel switches are provided at both ends of the cutting line slot 102. When the cutter 430 moves to the corresponding end of the cutting line slot 102, the corresponding travel switch is triggered, and the cutting driver 420 stops or runs in reverse according to the triggering command of the travel switch.

[0068] More specifically, the cutting driver 420 and the cutter 430 are both arranged on the side of the cutting bracket 410 facing away from the film adsorption plane 101. A gap groove 4101 is provided on the film adsorption platform 1, and the cutter 430 is set through the gap groove 4101, and the tip of the cutter extends out of the gap groove 4101.

[0069] In some embodiments, see Figure 3The cutting mechanism 4 is provided with a film support structure 11 on the side facing the film splicing adsorption plane 101. When the cutting mechanism 4 is in the cutting state, the pre-packaging film 6 can be compressed by the film support structure 11 when the pre-packaging film 6 loses tension the moment it is disconnected from the working film roller 13, providing tension for the continuous conveyance of the pre-packaging film 6. This allows the pre-packaging film 6 to be continuously conveyed until the last section of the pre-packaging film 6 corresponds to the film splicing adsorption plane 101. A brush 1110 is provided on the side of the film support structure 11 that contacts the pre-packaging film 6. The brush 1110 does not damage the pre-packaging film 6 during contact with the pre-packaging film 6, while providing tension through squeezing and friction with the pre-packaging film 6.

[0070] In some embodiments, see Figure 3 、 Figure 8 and Figure 9 The film splicing device further includes a translation mechanism 12, which drives the film splicing adsorption platform 1 to move in a direction perpendicular to the film splicing adsorption plane 101, so as to cooperate with the film preparation adsorption platform 2 to squeeze the pre-packaging film 6, the spare packaging film 7, and the adhesive layer 8 when the film preparation adsorption platform 2 is in the film splicing state. Taking into account the problems of manufacturing and assembly errors, after the film preparation adsorption platform 2 switches to the film splicing state, the gap between the film splicing adsorption plane 101 and the film preparation adsorption plane 201 is difficult to control. If the gap is too large, the adhesive layer 8 will not be able to contact the pre-packaging film 6. If the gap is too small, the film splicing adsorption platform 1 and the film preparation adsorption platform 2 will collide with each other, and film splicing will not be completed. It can be seen that solving the gap problem is crucial. In this embodiment, the film splicing adsorption platform 1 is configured as a translatable platform. When the film preparation adsorption platform 2 is initially switched to the film splicing state, a large gap exists between the film splicing adsorption plane 101 and the film preparation adsorption plane 201. Subsequently, the film splicing adsorption platform 1 is controlled by the translation mechanism 12 to approach the film preparation adsorption platform 2, ultimately causing the film splicing adsorption plane 101 and the film preparation adsorption plane 201 to cooperate in pressing the adhesive layer 8, the pre-packaging film 6, and the spare packaging film 7 together, achieving bonding. While ensuring film splicing reliability, this embodiment mitigates the effects of the uncontrolled gap between the film splicing adsorption plane 101 and the film preparation adsorption plane 201 on the film splicing effect.

[0071] More specifically, in order to ensure the film bonding effect, the film bonding adsorption plane 101 and the film preparation adsorption plane 201 need to remain parallel during the film bonding process, so a parallel adjustment mechanism is provided to correct the parallel relationship between the two planes. The parallel adjustment mechanism includes at least three distance sensors provided at the corners of the film bonding adsorption plane 101, and also includes at least three telescopic adjusters provided on the back of the film bonding adsorption platform 1. Each distance sensor is distributed along the circumference of the film bonding adsorption plane 101, forming a triangle or other polygonal distribution; the back of the film bonding adsorption platform 1 is provided with a platform base, which is connected to the frame 18. Each telescopic adjuster is distributed along the circumference of the film bonding adsorption platform 1, forming a triangle or other polygonal distribution, and its telescopic end is connected to the film bonding adsorption platform 1 through a ball joint structure, and the other end is connected to the platform base through a ball joint structure. When in use, first use each distance sensor to measure the distance between the film adsorption plane 101 and the preparation film adsorption plane 201 at the corresponding position. If the distances at each position are equal, no parallel adjustment is required; if there is a significant difference in the distances at each position, control each telescopic adjuster to extend and retract until the distances measured by each distance sensor are equal.

[0072] In some embodiments, the film splicing determination mechanism 5 includes a torque detection module, which is mounted on the working film roller 13 to detect the torque of the working film roller 13. Torque is an internal moment. A servo motor is mounted on the rotating shaft of the working film roller 13 to control the rotational speed of the working film roller 13 and provide a certain amount of power for conveying the pre-wrap film 6. As the working film roller 13 rotates, the traction of the pre-wrap film 6 on the working film roller 13 causes torsional elastic deformation of the rotating shaft of the working film roller 13, which can be used to measure the magnitude of the torque. When there is still pre-wrap film 6 on the working film roller 13, the torque value is relatively stable. When the pre-wrap film 6 on the working film roller 13 is exhausted, the end of the pre-wrap film 6 separates from the working film roller 13, and the torque value rapidly decreases, thereby indicating that the pre-wrap film 6 is exhausted. This determination method is simple, accurate, and very practical.

[0073] Based on the above embodiments, see Figure 1 and Figure 8 The film splicing judgment mechanism 5 further includes a tension detection module 510, which is disposed between the working wrapping film roller 13 and the tension roller 14 downstream of the working wrapping film roller 13 to detect the tension of the pre-wrap film 6 between the working wrapping film roller 13 and the tension roller 14. When there is still pre-wrap film 6 on the working wrapping film roller 13, the pre-wrap film 6 between the working wrapping film roller 13 and the tension roller 14 has a certain tension. When the pre-wrap film 6 on the working wrapping film roller 13 is exhausted, the end of the pre-wrap film 6 separates from the working wrapping film roller 13, and the tension decreases rapidly. The tension detection assists the torque detection, achieving multi-level judgment and more accurate judgment results.

[0074] To detect tension, the tension detection module 510 includes a detection bracket, a swing arm 511, and a proximity switch 512. The swing arm 511 is rotatably mounted on the detection bracket. A roller 513 is located at the lower end of the swing arm 511, and a trigger terminal is located at the upper end. The proximity switch 512 is mounted on the detection bracket, and the trigger terminal triggers the proximity switch 512 when it reaches the uppermost position. When there is still pre-wrap film 6 on the working wrapping film roller 13, the pre-wrap film 6 has a certain tension between the working wrapping film roller 13 and the tension roller 14. The roller 513 can roll on the upper surface of the pre-wrap film 6 during conveyance to avoid scratching the film surface, and the trigger terminal is kept away from the proximity switch 512. If the pre-wrap film 6 on the working wrapping film roller 13 is exhausted, the roller 513 loses its support and falls downward, simultaneously triggering the proximity switch 512. The signal of the proximity switch 512 changes, and this signal change can be used to confirm that the pre-wrap film 6 on the working wrapping film roller 13 has been exhausted.

[0075] In other embodiments of the tension detection module 510, the tension detection module 510 includes a pressure sensor with a sensing end facing the pre-packaging film 6. When there is still pre-packaging film 6 on the working packaging film roller 13, the pre-packaging film 6 can squeeze the sensing end, generating pressure. When the pre-packaging film 6 on the working packaging film roller 13 is exhausted, the end of the pre-packaging film 6 separates from the working packaging film roller 13, and the squeezing effect of the pre-packaging film 6 on the sensing end disappears, thereby achieving tension detection through pressure sensing. The greater the pressure sensed by the sensing end, the greater the tension of the pre-packaging film 6; the smaller the pressure sensed by the sensing end, the smaller the tension of the pre-packaging film 6.

[0076] In some more specific embodiments, see Figure 1 and Figure 8 The film splicing determination mechanism 5 also includes a position detection module 520, which is located downstream of the tension roller 14 and downstream of the working packaging film roller 13. The position detection module 520 determines the remaining length of the pre-packaging film 6 upstream of the tension roller 14 by detecting the markings on the pre-packaging film 6 downstream of the tension roller 14. The number of markings on the rolled packaging film is fixed. By counting the markings that pass through the pre-packaging film 6 during its transport, the length of the used pre-packaging film 6 and the remaining length of the pre-packaging film 6 can be determined. This further optimizes the multi-stage determination logic, resulting in more accurate determination results.

[0077] Specifically, the position detection module 520 includes a marking sensor, located between the working packaging film roller 13 and the tension roller 14. It is used to sense markings on the pre-packaging film 6, record the number of markings, and determine whether the pre-packaging film 6 is aligned. The markings can be implemented in the form of color codes, pattern markings, etc., without limitation, as long as they can be detected by the marking sensor. Accordingly, the marking sensor includes, but is not limited to, a color code sensor.

[0078] It should be noted that the torque detection module, the tension detection module 510 and the position detection module 520 can be used individually or in combination.

[0079] In some embodiments, a film splicing detector is further provided on the upstream side of the film splicing adsorption platform 1, which may be implemented by, but not limited to, a photoelectric sensor. If the film splicing operation is completed effectively, the spare packaging film 7 will block the light path of the film splicing detector. If the film splicing is not completed effectively, the spare packaging film 7 will not effectively block the light path of the film splicing detector. These two scenarios cause the film splicing detector to generate different signal states, thereby determining whether the film splicing is reliable. Specifically, the film splicing detector is positioned corresponding to the leading edge of the spare packaging film 7. If the leading edge of the spare packaging film 7 is skewed or the gap between it and the front packaging film 6 is too large, the film splicing detector will not be effectively blocked.

[0080] In some specific embodiments of the cooperation between the cutting mechanism 4 and the film preparation adsorption platform 2, see Figure 4 and Figure 5 The cutting mechanism 4 and the film preparation adsorption platform 2 are distributed along a preset path, which is parallel to the film preparation adsorption plane 101 and perpendicular to the swing axis 210 of the film preparation adsorption platform 2. The cutting mechanism 4 is connected to the flipping mechanism 3 as a whole, and the cutting mechanism 4 can reciprocate along the preset path to switch between the cutting state and the first avoidance state; the flipping mechanism 3 includes a guide cam structure, a guide rail 310 and a driving component 320, and the driving component 320 can drive the cutting mechanism 4 and the film preparation adsorption platform 2 to move along the preset path, the guide cam structure is connected to the shaft end of the swing axis 210, and the guide rail 310 is provided on the frame 18, the guide cam structure is slidably matched with the guide rail 310, and can drive the swing axis 210 to rotate during the movement of the film preparation adsorption platform 2 along the preset path; when the film preparation adsorption plane 201 is in the film preparation state, the cutting mechanism 4 is directly connected to the film preparation adsorption plane 101, as shown in FIG. Figure 8 shown.

[0081] During specific implementation, the cutting mechanism 4 and the film preparation adsorption platform 2 are integrally connected through the connecting bracket 15, and the film preparation bracket is rotatably connected to the connecting bracket 15 through the swing shaft 210. On the preset path, the two form a certain spacing space on the connecting bracket 15, providing movement space for the flipping of the film preparation adsorption platform 2.

[0082] See Figure 4 In some specific embodiments of the guide cam structure and the guide track 310, the guide cam structure includes a swing link 330 and a guide wheel 340, one end of the swing link 330 is rotatably connected to the guide wheel 340, and the other end is fixedly connected to the swing shaft 210; the guide track 310 is formed with a first guide section 311, a second guide section 312 and a third guide section 313 connected in sequence along a preset path, the first guide section 311 and the third guide section 313 are both substantially parallel to the preset path, and the second guide section 312 is tilted; in the preparation film During the switching process of the adsorption platform 2 from the film preparation state to the film connection state, the guide wheel 340 first travels a distance along the first guide section 311 and then enters the second guide section 312. Under the action of the second guide section 312, the end of the swing link 330 connected to the guide wheel 340 gradually tilts, thereby converting the upward movement of the swing shaft 210 into a rotation of the swing shaft 210, thereby achieving the upward flipping of the standby adsorption platform; the reverse operation can achieve the downward flipping of the standby adsorption platform, that is, the switching from the film connection state to the film preparation state. The flipping mechanism 3 of this embodiment has a simple overall structure and can achieve the purpose of flipping the film preparation adsorption platform 2 during the lifting process, thereby switching the state, and has better reliability and lower failure rate.

[0083] There are some other embodiments of the cooperation between the cutting mechanism 4 and the film preparation adsorption platform 2, which are further illustrated here:

[0084] 1) The cutting mechanism 4 is separately arranged from the film preparation adsorption platform 2, and the cutting mechanism 4 moves along a preset path to switch between the cutting state and the first avoidance state; the flipping mechanism 3 includes a flipping driver (such as a drive motor), and the output shaft of the flipping driver is connected to the swing shaft 210, thereby driving the swing shaft 210 to rotate, and the film preparation adsorption platform 2 can be flipped without moving up and down.

[0085] 2) The cutting mechanism 4 is separately arranged from the film preparation adsorption platform 2, and the cutting mechanism 4 is rotatably connected to the frame 18 to realize switching between the cutting state and the first avoidance state. Its cutting part can approach or move away from the film connection adsorption plane 101 during the overall rotation of the cutting mechanism 4. When it approaches and presses against the front packaging film 6, cutting can be achieved; the flipping mechanism 3 includes a flipping driver (such as a driving motor), and the output shaft of the flipping driver is transmission-connected to the swing shaft 210, thereby driving the swing shaft 210 to rotate, and the film preparation adsorption platform 2 can be flipped without moving up and down.

[0086] In some embodiments, see Figures 4 to 7The film joining device also includes an auxiliary film pressing mechanism 16, which includes a film pressing rod 1610 and a film pressing control component. The film pressing control component is arranged on the frame 18, and the film pressing rod 1610 is parallel to the swing axis 210 of the film preparation adsorption platform 2; the film pressing control component drives the film pressing rod 1610 to swing around the auxiliary swing axis parallel to the swing axis 210, so that the film pressing rod 1610 switches between a pressing state in contact with the film preparation adsorption plane 201 and a second avoidance state away from the film preparation adsorption plane 201. By setting up the film pressing rod 1610, after the film preparation adsorption platform 2 adsorbs and fixes the spare packaging film 7, the film pressing rod 1610 can assist in positioning the spare packaging film 7 to prevent the spare packaging film 7 from falling due to the sudden loss of vacuum adsorption effect of the film preparation adsorption platform 2. After the vacuum is restored, the spare packaging film 7 can still be effectively adsorbed and adhered to the film preparation adsorption platform 2; at the same time, the film pressing control component can also drive the film pressing rod 1610 away from the film preparation adsorption plane 201, so in the second avoidance state, the film pressing rod 1610 will not affect the film connection.

[0087] Based on the above embodiments, see Figure 6 The film pressing rod 1610 is provided with a plurality of elastic pressing rings 1620, which are used to abut against the spare packaging film 7. The elastic pressing rings 1620 reduce the contact area between the film pressing rod 1610 and the spare packaging film 7, thereby ensuring the reliability of the contact between the two and further ensuring the auxiliary positioning effect of the spare packaging film 7. At the same time, the elastic material can also minimize the wear of the spare packaging film 7.

[0088] Based on the above embodiments, see Figure 7 The film pressing control assembly includes a guide plate 1630, a swing arm 1640, a positioning spring 1650 and a handle 1660. The guide plate 1630 is connected to the frame 18 and is provided with an arc track 1631; one end of the swing arm 1640 is rotatably connected to the guide plate 1630, and the connection position is coaxial with the arc track 1631. The end of the film pressing rod 1610 is placed in the arc track 1631 and can move along the long axis of the arc track 1631. The other end of the swing arm 1640 is fixed to the end of the film pressing rod 1610 to drive the film pressing rod 1610 to move; one end of the positioning spring 1650 is connected to the guide plate 1630, and the other end is connected to the swing arm 1640. The arc track 1631 has a first end and a second end. When the film pressing rod 1610 moves to the first end, the film pressing rod 1610 is in a compressed state. At the same time, the positioning spring 1650 is extended and fixes the posture of the swing rod 1640 through elastic force. Figure 7As shown; when the film pressing rod 1610 moves to the second end, the film pressing rod 1610 is in the second avoidance state, the positioning spring 1650 shortens and fixes the posture of the swing rod 1640; the operator can adjust the state of the film pressing rod 1610 through the handle 1660; when the film pressing rod 1610 is in the clamping state and the film preparation adsorption platform 2 needs to be switched to the film connection state, the upward movement of the film preparation adsorption platform 2 pushes the film pressing rod 1610 in reverse, and the film pressing rod 1610 automatically switches to the second avoidance state under the tightening action of the positioning spring 1650.

[0089] In some embodiments, the film adsorption platform 1 is provided with four groups of posture detectors 17 (e.g., photoelectric sensors, respectively defined as T1, T2, T3 and T4 in the figure), which are symmetrically positioned on both sides of the front packaging film 6. Figure 12 As shown), both sides of the front packaging film 6 do not block the posture detector 17 on the corresponding side, and the detectors T1, T2, T3 and T4 are all in the first signal state; if the front packaging film 6 is skewed during transportation, the following is generated Figure 13 In the deflected state shown, T1 and T3 are still unobstructed and are in the first signal state, but T2 and T4 are blocked and change to the second signal state. The overall state of the four groups of detectors changes. In this way, the state of the front packaging film 6 can be accurately determined by automated detection, and the staff can be reminded to make timely adjustments.

[0090] Because the film splicing and adsorption platform 1 is positioned between the working packaging film roller 13 and the tension roller 14, the force applied to the downstream side of the film splicing and adsorption platform 1 can directly act on the pre-packaging film 6, directly changing the traction state of the pre-packaging film 6 on the film splicing and adsorption platform 1 and the working packaging film roller 13. This also ensures that the pre-packaging film 6 on the film splicing and adsorption platform 1 is smooth and wrinkle-free. Therefore, based on the above-described embodiment, in order to timely adjust the posture of the pre-packaging film 6, an adjustment mechanism is provided on the downstream side of the film splicing and adsorption platform 1. The adjustment mechanism is located between the film splicing and adsorption platform 1 and the tension roller 14 and specifically includes two sets of adjustment rollers disposed opposite each other. Under normal conditions, the roller axes of the two sets of adjustment rollers are perpendicular to the conveying path of the pre-packaging film 6. The pre-packaging film 6 passes through the gap between the two sets of adjustment rollers. The two sets of adjustment rollers can generate frictional contact with both sides of the pre-packaging film 6 during conveyance, thereby providing tension to the pre-packaging film 6 downstream of the adjustment mechanism and ensuring smooth conveyance of the pre-packaging film 6. The two ends of the adjusting roller are respectively provided with telescopic adjusting parts, the roller shaft of the adjusting roller is rotatably connected to the telescopic end of the adjusting telescopic part, the main body of the adjusting telescopic part is connected to the frame 18, and the telescopic direction of the adjusting telescopic part is parallel to the conveying path of the front packaging film 6; if the front packaging film 6 is skewed during transportation, Figure 13The illustrated scenario illustrates a situation in which the adjustment members on the right ends of the two sets of adjustment rollers contract synchronously, causing the right ends of the two sets of adjustment rollers to swing upward synchronously. During this movement, the two sets of adjustment rollers exert a pulling force on the right side of the pre-packaging film 6, thereby pulling the pre-packaging film 6 back to its normal conveying state. After the conveying state returns to normal, the contracted adjustment members slowly extend and return to their initial state. Because the resetting speed of the adjustment members is much slower than their retraction speed during adjustment, they do not exert significant pulling force on the pre-packaging film 6 during the resetting process, thereby not affecting the conveying state of the pre-packaging film 6. The implementation of the adjustment members includes, but is not limited to, electric push rods, telescopic cylinders, and the like.

[0091] More specifically, an adapter is provided between the adjustment roller and the adjustment telescopic member, and the adapter includes a rotating cylinder and a connecting ear. The rotating cylinder is sleeved outside the roller shaft of the adjustment roller and is rotationally adapted to the roller shaft (for example, a bearing is provided between the two to achieve rotation adaptation). The connecting ear is fixed to the closed end of the rotating cylinder, and the connecting ear is hinged to the telescopic end of the adjustment telescopic member. In addition, the other end of the adjustment telescopic member is also hinged to the frame 18 to adapt to the tilting posture of the adjustment roller.

[0092] More specifically, in order to maintain effective contact with the pre-packaging film 6 during normal operation, an elastic pressure assembly is provided between the adjustment end of the adjustment telescopic member and the frame 18. This allows the two sets of adjustment rollers to effectively contact the pre-packaging film 6 through elastic forces. However, to ensure smooth conveyance of the pre-packaging film 6, the pressure exerted by the adjustment mechanism on the pre-packaging film 6 must be limited. Therefore, a speed sensor is provided on the roller shaft of the adjustment roller. If the speed detected by the speed sensor is lower than a preset minimum value, it is determined that the friction between the adjustment roller and the pre-packaging film 6 is excessive, affecting the conveyance speed of the pre-packaging film 6, and the pressure between the adjustment roller and the pre-packaging film 6 needs to be adjusted. Based on the need to adjust the pressure between the adjustment roller and the front packaging film 6, the elastic pressing assembly includes a base, an adjustment seat, an adjustment rod, an elastic member, a first magnet and a second magnet. The base and the frame 18 are connected by a ball joint, the adjustment seat and the base are arranged opposite to each other, and the adjustment seat and the telescopic end of the adjustment telescopic member are also connected by a ball joint; one end of the adjustment rod is fixed to the base, and the other end of the adjustment rod passes through the adjustment seat and slides with the adjustment seat. The protruding end of the adjustment rod is provided with a limiting protrusion to prevent the adjustment seat from falling off the adjustment rod; the elastic member is provided between the base and the adjustment seat, and a first magnet is provided on the side of the base facing the adjustment seat, and a second magnet opposite to the first magnet is provided on the adjustment seat, wherein the first magnet and / or the second magnet are electromagnets. The specific usage method is illustrated by an example: increasing the repulsive force between the first magnet and the second magnet so that the adjustment seat is tightly in contact with the limiting protrusion. The adjustment seat can be pressed and moved only when it is subjected to a greater pressure. The overall stiffness of the elastic pressing component is relatively large. At this time, the pressure between the adjustment roller and the front packaging film 6 can be increased; reducing the repulsive force between the first magnet and the second magnet so that the contact force between the adjustment seat and the limiting protrusion is reduced. The adjustment seat can be pressed and moved only when it is subjected to a smaller pressure. The overall stiffness of the elastic pressing component is relatively small. At this time, the pressure between the adjustment roller and the front packaging film 6 can be reduced.

[0093] Among them, the implementation methods of the elastic part include but are not limited to springs; the speed sensor can detect the speed of the adjustment roller and can be obtained by purchase. The specific structure will not be described here; in order to ensure that the adjustment seat is subjected to uniform force, multiple adjustment rods are set along the circumference of the adjustment seat.

[0094] Based on the same inventive concept, the present invention further provides a packaging device including the above-mentioned film splicing device. In this embodiment, the packaging device further comprises a frame 18 on which the film splicing device is integrally mounted.

[0095] Compared with the prior art, the packaging equipment provided in this embodiment can minimize the waste of raw materials during the production of packaging bags by adopting the above-mentioned film splicing device, achieve continuous and efficient production process, and reduce production costs.

[0096] Based on the same inventive concept, an embodiment of the present application further provides a film bonding method, which is implemented based on the above-mentioned film bonding device. The film bonding method includes the following steps:

[0097] S10, placing the head end of the spare packaging film 7 on the spare packaging film roller 19 on the spare film adsorption plane 201, and fixing the spare packaging film 7 by vacuum adsorption;

[0098] S20, placing an adhesive layer 8 between the head end of the spare packaging film 7 and the spare film adsorption plane 201, and pre-bonding the adhesive layer 8 to the spare packaging film 7;

[0099] S30, the film splicing judgment mechanism 5 determines that the remaining packaging film is insufficient and generates a film splicing instruction, then controls the film splicing adsorption platform 1 to adsorb and fix the pre-packaging film 6, and cuts the pre-packaging film 6 through the cutting mechanism 4;

[0100] S40, controlling the cutting mechanism 4 to switch to the first avoidance state, and driving the film preparation adsorption platform 2 to switch from the film preparation state to the film connection state through the flipping mechanism 3, until the adhesive layer 8 connects the end edge of the front packaging film 6 with the beginning edge of the spare packaging film 7;

[0101] S50, the flip mechanism 3 drives the film preparation adsorption platform 2 to switch from the film splicing state to the film preparation state, and releases the adsorption state of the film splicing adsorption platform 1 on the pre-packaging film 6 and the adsorption state of the film preparation adsorption platform 2 on the standby packaging film 7.

[0102] Compared with the prior art, the film splicing method provided in this embodiment is simple to operate overall. After accurately determining the remaining length of the pre-packaging film 6, the film can be effectively spliced to achieve a seam-like connection between the pre-packaging film 6 and the spare packaging film 7, thereby avoiding the problem of packaging film waste caused by overlapping and lap-jointing, and effectively reducing production costs.

[0103] In some embodiments, the film splicing determination mechanism 5 determines that the remaining packaging film is insufficient and generates a film splicing instruction specifically includes:

[0104] S310, obtaining the torque under the working packaging film roller 13 through the torque detection module. If the torque drops to a preset low torque value within a preset time period, the data processing module determines that the front packaging film 6 on the working packaging film roller 13 is exhausted;

[0105] S320: Generate film splicing instructions.

[0106] In this embodiment, the torque detection module is implemented by, but not limited to, a torque sensor, which can be obtained through existing technical means (eg, purchased), and its specific structure is not described here. In addition, the data processing module is a module integrated into the industrial computer.

[0107] In some embodiments, between step S310 and step S320, the following steps are further included:

[0108] S330. The tension of the pre-packaging film 6 between the working packaging film roller 13 and the tension roller 14 is detected by the tension detection module 510. If the tension of the pre-packaging film 6 drops to a preset low tension value, the data processing module determines that the pre-packaging film 6 on the working packaging film roller 13 is exhausted.

[0109] In some embodiments, between step S330 and step S320, the following steps are further included:

[0110] S340, obtaining image information on the pre-packaging film 6 downstream of the tension roller 14 by the position detection module 520, and determining the length of the pre-packaging film 6 remaining upstream of the tension roller 14 based on the image information;

[0111] S350 , judging the feedable length of the remaining pre-packaging film 6 according to the length of the remaining pre-packaging film 6 , and continuously feeding the remaining pre-packaging film 6 according to the feedable length.

[0112] In some embodiments, step S350 specifically includes:

[0113] S351. Obtain the original quantity N marked on the six rolls of pre-packaging film. The original quantity N is a parameter set when the packaging film rolls leave the factory and can be pre-entered into the industrial computer.

[0114] S352, counting the number of passed markings by the marking sensor during the process of conveying the pre-packaging film 6, and obtaining the number n1 of markings passed after the pre-packaging film 6 on the working packaging film roller 13 is exhausted;

[0115] S353. Calculate, by the data processing module, a difference ∆n between the original number N and the number n1 of passed identifiers, where ∆n is an integer greater than 1.

[0116] S354, control the packaging equipment to continuously convey the front packaging film 6, and at the same time obtain the number of passed identification marks n2 through the identification sensor until n2=∆n-1. At this time, the film adsorption platform 1 corresponds to the last section of packaging film on the front packaging film 6, wherein n2 corresponds to the feedable length of the remaining front packaging film 6.

[0117] In this embodiment, markings are provided at regular intervals on the packaging film, and the spacing between adjacent markings is fixed. Therefore, the conveyed length of the packaging film can be determined by the number of markings that have passed. It should be noted that the remaining pre-packaging film 6 refers to the remaining length of the pre-packaging film 6 after the pre-packaging film 6 on the working packaging film roller 13 has been exhausted, as determined by the data processing module.

[0118] In some embodiments, a film adsorption platform 1 is further provided with a film adsorption detector on the upstream side. Based on this, the following steps are further included after step S50:

[0119] S60, perform film connection detection:

[0120] Acquire the detection signal of the film connection detector through the data processing module;

[0121] If the detection signal is the first signal, there is no packaging film blocking the corresponding area of the film connection detector, and it is determined that the connection between the end of the front packaging film 6 and the spare packaging film 7 is not in place, and an alarm signal is generated to prompt the operator to make adjustments;

[0122] If the detection signal is the second signal, the corresponding area of the film connection detector is blocked by the packaging film, and it is determined that the end of the front packaging film 6 and the spare packaging film 7 are connected in place, and the subsequent production process can be entered.

[0123] This embodiment includes a film splicing detection step to assess the quality of film splicing, preventing improperly spliced packaging films from entering subsequent production processes, which could result in substandard packaging bag appearance. This embodiment also provides an alert to operators, offering a higher level of intelligence. Alarm signals can be implemented, but are not limited to, sound signals and flashing lights.

[0124] The following is an example of the use process of the film bonding device of this application:

[0125] First, the operator flattens the spare packaging film 7 on the spare film roll and attaches it to the film attachment platform 2, with the front of the spare packaging film 7 facing up. After aligning the front color mark, the operator uses a cutter to cut and discard the portion of the spare packaging film 7 on the film attachment platform 2 along the cutting groove 203. A section of adhesive tape, which will serve as the adhesive layer 8, is attached to the center of the film attachment platform 2. The operator then adheres the leading edge of the cut spare packaging film 7 to the tape, completing the film preparation operation. The cutting groove 203 divides the film attachment plane 201 into a first surface and a second surface. The tape must cover the attachment holes 9 on both the first and second surfaces.

[0126] Second, the front packaging film 6 installed on the adsorption working packaging film roller 13 is fed to the packaging station under the action of traction, and the torque value of the torque detection module is relatively stable. When the front packaging film is used up, the torque value decreases rapidly; at the same time, the swing rod 511 of the tension detection module 510 gradually swings downward as the front packaging film 6 on the front film roll becomes less and less. When the front packaging film is used up, the end of the front packaging film 6 is separated from the adsorption working packaging film roller 13 and loses tension. The swing rod 511 suddenly swings downward and triggers the proximity switch 512, and determines whether the front film roll is used up by combining torque and tension.

[0127] Third, after determining that the front roll film is exhausted, the identification sensor scans the color mark on the front packaging film 6, and the front packaging film 6 continues to be fed to the bag making station. At this time, the number of color marks is counted to determine the position of the end of the front packaging film 6; when the end of the front packaging film 6 reaches the set position, the film splicing and adsorption platform 1 is pushed out under the drive of the translation mechanism 12, and the film splicing and adsorption platform 1 presses the end of the front packaging film 6 toward the cutting mechanism 4, compacting the front packaging film 6, and the cutter 430 is driven by the cutting driver 420 (such as a rodless cylinder) to cut off the tail of the front packaging film 6 along the cutting line groove 102.

[0128] Fourth, the vacuum pipeline provides vacuum suction to the film splicing platform 1. Driven by the translation mechanism 12, the film splicing platform 1 retracts and secures the end of the pre-packaging film 6 through suction through the suction holes 9. Then, the connecting bracket 15 moves upward, driven by the drive assembly 320. The film preparation platform 2 and the cutting mechanism 4 move upward along with the connecting bracket 15. The film preparation platform 2 flips upward 90 degrees during this upward movement. Driven by the translation mechanism 12, the film splicing platform 1 is pushed out and presses the end of the pre-packaging film 6 toward the film preparation platform 2. The end of the pre-packaging film 6 and the beginning of the spare packaging film 7 are connected by tape, and the automatic film splicing is completed.

[0129] Fifth, the vacuum adsorption of the film splicing adsorption platform 1 and the film preparation adsorption platform 2 is released. The film splicing adsorption platform 1 is retracted under the drive of the translation mechanism 12, and the connecting bracket 15 moves downward under the drive of the driving component 320. The film preparation adsorption platform 2 and the cutting mechanism 4 move downward together with the connecting bracket 15. The film preparation adsorption platform 2 flips downward 90° during the downward movement, and the film splicing device automatically resets.

[0130] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A film splicing device, characterized in that: include: A film adsorption platform (1) has a film adsorption plane (101) for adsorbing the front packaging film (6) drawn out by the working packaging film roller (13); The film preparation adsorption platform (2) has a film preparation adsorption plane (201) for adsorbing the adhesive layer (8) and the spare packaging film (7) drawn out by the spare packaging film roller (19); The flip mechanism (3) drives the film preparation adsorption platform (2) to swing, so that the film preparation adsorption plane (201) switches between a film preparation state close to the film connection adsorption plane (101) and a film connection state away from the film connection adsorption plane (101); when the film preparation adsorption plane (201) is in the film preparation state, the film preparation adsorption plane (201) and the film connection adsorption plane (101) are arranged at an angle; when the film preparation adsorption plane (201) is in the film connection state, the film preparation adsorption plane (201) and the film connection adsorption plane (101) are parallel to each other, so that the end edge of the front packaging film (6) and the head edge of the standby packaging film (7) are connected to each other through the adhesive layer (8); A cutting mechanism (4) is provided corresponding to the film joining adsorption plane (101) and is capable of cutting the pre-packaging film (6). The cutting mechanism (4) is capable of switching between a cutting state close to the film joining adsorption plane (101) and a first avoiding state away from the film joining adsorption plane (101); when the film preparation adsorption plane (201) is in the film joining state, the cutting mechanism (4) is in the first avoiding state; A film splicing judging mechanism (5) is used to judge the remaining state of the pre-packaging film (6) roll and generate a film splicing instruction; A pre-positioning member (10) is movably connected to the film preparation adsorption platform (2), and the pre-positioning member (10) can pre-position the spare packaging film (7) by clamping after the spare packaging film (7) is placed on the film preparation adsorption platform (2); The cutting mechanism (4) is provided with a film support structure (11) on one side facing the film adsorption plane (101). When the cutting mechanism (4) is in the cutting state, when the front packaging film (6) loses tension at the moment of disconnection from the working packaging film roller (13), the front packaging film (6) can be pressed by the film support structure (11), thereby providing tension for the continuous transportation of the front packaging film (6); A film splicing detector is also provided on the upstream side of the film splicing adsorption platform. If the film splicing operation is effectively completed, the spare packaging film (7) can block the light path of the film splicing detector. If the film splicing is not effectively completed, the spare packaging film (7) cannot effectively block the light path of the film splicing detector. The flipping mechanism (3) includes a guide cam structure, a guide rail (310) and a driving assembly (320), wherein the driving assembly (320) can drive the cutting mechanism (4) and the film preparation adsorption platform (2) to move along the preset path, the guide cam structure is connected to the shaft end of the swing shaft (210), and the guide rail (310) is provided on the frame (18). The guide cam structure and the guide rail (310) are slidably matched and can drive the swing shaft (210) to rotate when the film preparation adsorption platform (2) moves along the preset path; The guide cam structure comprises a swing link (330) and a guide wheel (340); one end of the swing link (330) is rotatably connected to the guide wheel (340), and the other end is fixedly connected to the swing shaft (210).

2. The film splicing device according to claim 1, wherein: The film splicing device further comprises a translation mechanism (12), which drives the film splicing adsorption platform (1) to move in a direction perpendicular to the film splicing adsorption plane (101), so as to cooperate with the film preparation adsorption platform (2) to extrude the front packaging film (6), the spare packaging film (7) and the adhesive layer (8) when the film preparation adsorption platform (2) is in the film splicing state.

3. The film splicing device according to claim 1, wherein: The film splicing judgment mechanism (5) comprises a torque detection module, and the torque detection module is arranged on the working packaging film roller (13) to obtain the torque of the working packaging film roller (13).

4. The film splicing device according to claim 3, wherein: The film splicing judgment mechanism (5) further includes a tension detection module (510), which is arranged between the working packaging film roller (13) and a tension roller (14) downstream of the working packaging film roller (13) to obtain the tension of the front packaging film (6) between the working packaging film roller (13) and the tension roller (14).

5. The film splicing device according to claim 3 or 4, characterized in that: The film splicing judgment mechanism (5) further includes a position detection module (520), which is arranged on the downstream side of the tension roller (14) downstream of the working packaging film roller (13) and judges the length of the remaining pre-packaging film (6) upstream of the tension roller (14) by obtaining a mark on the pre-packaging film (6) downstream of the tension roller (14).

6. The film splicing device according to claim 1, wherein: The cutting mechanism (4) and the film preparation adsorption platform (2) are distributed along a preset path, the preset path is parallel to the film connection adsorption plane (101) and perpendicular to the swing axis (210) of the film preparation adsorption platform (2), the cutting mechanism (4) is integrally connected to the flip mechanism (3), and the cutting mechanism (4) can move back and forth along the preset path to switch between a cutting state and a first avoidance state; When the film preparation adsorption plane (201) is in the film preparation state, the cutting mechanism (4) faces the film connection adsorption plane (101).

7. The film splicing device according to claim 1, wherein: The film joining device further comprises an auxiliary film pressing mechanism (16), the auxiliary film pressing mechanism (16) comprising a film pressing rod (1610) and a film pressing control assembly, the film pressing control assembly being arranged on a frame (18), the film pressing rod (1610) being parallel to the swing axis (210) of the film preparation adsorption platform (2); The film pressing control assembly drives the film pressing rod (1610) to swing around an auxiliary swing axis parallel to the swing axis (210), so that the film pressing rod (1610) switches between a pressing state in contact with the film preparation adsorption plane (201) and a second avoiding state away from the film preparation adsorption plane (201).

8. The film splicing device according to claim 7, characterized in that: The film pressing rod (1610) is provided with a plurality of elastic pressing rings (1620), and the elastic pressing rings (1620) are used for abutting against the spare packaging film (7).

9. A packaging device, characterized in that: The invention comprises a film splicing device as described in any one of claims 1 to 8.

10. A film splicing method, implemented based on the film splicing device according to any one of claims 1 to 8, characterized in that: The following steps are involved: S10, placing the head end of the spare packaging film (7) on the spare packaging film roller (19) on the spare film adsorption plane (201), and fixing the spare packaging film (7) by vacuum adsorption; S20, placing an adhesive layer (8) between the head end of the spare packaging film (7) and the spare film adsorption plane (201), and pre-bonding the adhesive layer (8) and the spare packaging film (7); S30, the film splicing judgment mechanism (5) judges that the pre-packaging film (6) is insufficient and generates a film splicing instruction, then controls the film splicing adsorption platform (1) to adsorb and fix the pre-packaging film (6), and cuts the pre-packaging film (6) through the cutting mechanism (4); S40, controlling the cutting mechanism (4) to switch to the first avoidance state, and driving the film preparation adsorption platform (2) to switch from the film preparation state to the film connection state through the flipping mechanism (3), until the adhesive layer (8) connects the end edge of the front packaging film (6) and the head edge of the spare packaging film (7); S50, the film preparation adsorption platform (2) is driven to switch from the film connection state to the film preparation state through the flip mechanism (3), and the adsorption state of the film connection adsorption platform (1) on the front packaging film (6) and the adsorption state of the film preparation adsorption platform (2) on the spare packaging film (7) are released.

Images