Material position correcting system and method and packaging machine

Abstract

The invention relates to a material position correcting system, a correcting method and a packaging machine. A conveying belt drives materials to move forwards at a first speed; the straightener comprises a material blocking assembly and a driving transmission assembly used for driving the material blocking assembly. And the material blocking assembly achieves circulating reciprocating motion in the front-back direction close to the conveying belt to block materials, away from the conveying belt to release the materials and controls the material blocking piece to move at a second speed in the process of moving forwards from the material blocking position to the material releasing position, and the second speed is smaller than the first speed. When the material blocking assembly releases the materials, the materials are located in the range of the packaging film. The front and back positions of the materials can be corrected, it is guaranteed that the front and back positions of the materials do not deviate in the conveying process, and the packaging efficiency and the yield can be improved advantageously.

Description

Technical Field

[0001] The present invention relates to the technical field of packaging equipment, and particularly relates to a material position correction system and a correction method, and also relates to a packaging machine applying the material correction system and the correction method. Background Art

[0002] A packaging machine is a type of machine that packages products, playing the roles of protection and aesthetics. Packaging machines are mainly divided into two aspects: one is the pipeline-type overall production packaging, and the other is the product peripheral packaging equipment. Among them, the pipeline-type overall production packaging mainly consists of equipment such as a conveying mechanism for conveying materials to be packaged and packaging films, and a sealing mechanism. The sealing mechanism is used to cut and seal the packaging film filled with packaging materials. After being sealed by the sealing mechanism, the product can be hermetically stored, maintaining the product quality and avoiding packaging air leakage. It is widely used in the fields of daily chemical product packaging, food, and drug packaging.

[0003] According to different packaging materials, in the actual production process, there are often situations where there are mistakes in the cooperation between the materials and the packaging film. The position of the material is too far forward or backward relative to the sealing position of the packaging film. For example, when packaging ice cream, when the ice cream is conveyed from the material conveyor to the packaging film, due to the small friction between the ice cream and the packaging film, the ice cream will slip forward when entering the packaging film, and then the position of the ice cream is too far forward relative to the sealing range of the packaging film.

[0004] Since patterns, words, etc. are printed on the packaging film, in order to ensure that it is not cut on the pattern, the cutting and sealing positions are fixed. The position of the material in the packaging film before sealing needs to be within a standard position range. The standard position range refers to the position where the material is located relatively in the middle in the packaging film, and there is a certain margin between the two ends of the material and the sealing position. If the position of the material shifts forward or backward, in serious cases, it may be cut on the material during sealing, which will damage the material, that is, affect the packaging efficiency, and at the same time lead to the generation of waste products, increasing the waste product rate and the manufacturing cost.

[0005] In addition, according to different packaging materials, there may be two or more materials packaged in one packaging film, such as packaging syringe assemblies in one packaging film. In the actual production process, there are often situations where the relative positions of multiple materials shift forward or backward, making the front and rear positions of multiple materials uneven in the moving direction. For example, two syringes are not in a straight line, one is in front and the other is behind. In serious cases, it may also be cut on the material, causing material damage.

[0006] To avoid the above problems, the traditional solution is to lengthen the length of the packaging film to increase the margin at both ends of the material. In this way, when the material shifts forward or backward relative to the packaging film, the material will not be cut. However, this traditional method greatly increases the cost of the packaging film. Summary of the Invention

[0007] The main technical problem to be solved by the present invention is to provide a material position correction system and a correction method that can correct the front and rear positions of materials, ensure that the front and rear positions of the materials on the packaging film do not shift, are beneficial to improving the packaging efficiency and the finished product rate, and reduce the manufacturing cost. At the same time, a packaging machine using the correction system or the correction method is provided.

[0008] To solve the above technical problem, the first technical solution adopted by the present invention is:

[0009] A material position correction system, comprising:

[0010] A conveyor belt that drives the material to move forward at a first speed;

[0011] A corrector, comprising a material blocking component and a driving transmission component for driving the material blocking component;

[0012] A controller, the material blocking component is configured to approach the conveyor belt to block the material, move away from the conveyor belt to release the material, and perform a reciprocating motion in the front and rear directions. It is controlled that the material blocking component moves at a second speed during the process of moving forward from the position of blocking the material to the position of releasing the material, and the second speed is less than the first speed. When the material blocking component releases the material, the material is located within the range of the packaging film.

[0013] Further, the material blocking component includes a first material blocking plate, which is located above the conveyor belt and perpendicular to the moving direction of the conveyor belt, and the first material blocking plate is connected to the driving transmission component.

[0014] Further, the material blocking component further includes a second material blocking plate, the second material blocking plate is fixed on the driving transmission component, the first material blocking plate is slidably installed on the second material blocking plate through a sliding pair, the first material blocking plate can slide in a direction close to or away from the conveyor belt relative to the second material blocking plate, and a return spring is installed between the first material blocking plate and the second material blocking plate.

[0015] Further, the driving transmission component includes a driving motor and a transmission mechanism, the driving motor is fixed on the fixed plate, the transmission mechanism includes a double crank mechanism and a motion mechanism for driving the double crank mechanism to move, the material blocking component is fixedly connected to the double crank mechanism, and the output shaft of the driving motor is connected to the motion mechanism.

[0016] Further, the motion mechanism for driving the double crank mechanism includes a synchronous belt and two synchronous belt pulleys. The output shaft of the driving motor is fixedly connected to the main synchronous belt pulley and drives the main synchronous belt pulley to rotate. The main synchronous belt pulley drives the secondary synchronous belt pulley to rotate through the synchronous belt. The main synchronous belt pulley and the secondary synchronous belt pulley are respectively connected to the double crank through shafts;

[0017] Alternatively, the motion mechanism for driving the double-crank mechanism includes a driving gear and a driven gear. The driving gear and the driven gear are respectively connected to the double-crank through shafts. The output shaft of the driving motor is fixedly connected to the driving gear and drives the driving gear to rotate. The driving gear and the driven gear are meshed and connected to each other through a plurality of transmission gears. The number of the transmission gears is required to make the two cranks rotate synchronously and in the same direction.

[0018] Furthermore, the correction device is also provided with a response module for responding to the instruction that the material blocking component is blocked by the material and does not move to the specified height during the process of approaching the conveyor belt. After the sealing device responds to the instruction, when the packaging film containing this group of materials reaches the sealing position, it does not perform the sealing action.

[0019] Furthermore, the response module is a proximity switch installed on the material blocking component. When the material blocking component is blocked by the material and does not move to the specified height during the process of approaching the conveyor belt, the proximity switch is triggered, and the trigger signal is transmitted to the sealing device through the controller.

[0020] The second technical solution adopted by the present invention is:

[0021] A method for correcting the position of materials includes the following steps:

[0022] S1. Control the materials to move forward at a first speed;

[0023] S2. When the materials move to the correction position, control the material blocking component to approach the conveyor belt to block the materials, move away from the conveyor belt to release the materials, and perform a reciprocating motion in the front and back directions. The material blocking component moves at a second speed during the process of moving forward from the position of blocking the materials to the position of releasing the materials, and the second speed is less than the first speed. When the material blocking component releases the materials, the materials are located within the range of the packaging film.

[0024] Furthermore, when the material blocking component is blocked by the material and does not move to the specified height during the process of approaching the conveyor belt, control the sealing device not to perform the cutting and sealing actions when this group of materials reaches the sealing position.

[0025] The third technical solution adopted by the present invention is:

[0026] A packaging machine is installed with the above-mentioned material position correction system or adopts the above-mentioned material position correction method.

[0027] In summary, compared with the prior art, a material position correction system, correction method and packaging machine provided by the present invention have the following advantages:

[0028] (1) By controlling the reciprocating movement of the material blocking component above the conveyor belt, the present invention enables the material to be pushed in the front-back direction by the material blocking component before the packaging film is sealed. By utilizing the speed difference between the material blocking component and the material, the position of the material can be corrected, the material can be placed within the range of the packaging film, ensuring that the front-back position of the material does not shift during sealing, which is conducive to significantly improving the packaging efficiency and the finished product rate and reducing the manufacturing cost.

[0029] (2) By providing a response module on the correction device for responding to the instruction that the material blocking component is blocked by the material and does not reach the specified height during the process of approaching the conveyor belt, the present invention enables the material that has not been position-corrected not to perform the horizontal sealing operation at the sealing device, which can effectively avoid damaging the material, further improve the finished product rate of the product, and at the same time can also effectively avoid damaging the sealing device and reduce the manufacturing cost.

[0030] (3) The present invention can be modified on the original packaging machine, and the modification cost is low.

[0031] The following further describes in detail the specific embodiments of the present invention with reference to the accompanying drawings. Description of the Drawings

[0032] The accompanying drawings, as part of the present invention, are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation to the present invention. Obviously, the accompanying drawings in the following description are only some embodiments, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0033] In the accompanying drawings:

[0034] Figure 1 is the structural schematic diagram of the packaging machine of the present invention;

[0035] Figure 2 is the structural diagram of the correction device in Embodiment 1 of the present invention;

[0036] Figure 3 is Figure 2 the top view of

[0037] Figure 4 is Figure 2 the front view (removing the cover) of

[0038] Figure 5 is Figure 4 the A-A cross-sectional view of

[0039] Figure 6 is Figure 4 the B-B cross-sectional view of

[0040] Figure 7It is the structural diagram (removing the cover) of the correction device in the second embodiment of the present invention;

[0041] Figure 8 It is Figure 7 the front view of.

[0042] In the figure:

[0043] Conveyor belt 1, frame 2, material 3, sealing device 4, longitudinal sealing device 41, transverse sealing device 42;

[0044] Corrector 5, fixing plate 51;

[0045] Material blocking component 52, first material blocking plate 521, second material blocking plate 522, mounting edge 5221, third mounting hole 5222, sliding pair 523, linear slide rail 5231, slider 5232, return spring 524;

[0046] Drive transmission component 53, drive motor 531, output shaft 5311, electromagnetic switch 532, electromagnetic switch fixing bar 533, double crank mechanism 534, crank 5341, connecting arm 5342, crank shaft 5343, bearing 5344, motion mechanism 535, synchronous belt 5351, main synchronous belt pulley 5352, auxiliary synchronous belt pulley 5353, connecting rod shaft 536, nut 537, bearing 538;

[0047] Motion mechanism 535', driving gear 5354', driven gear 5355', transmission gear 5356', connecting rod shaft 536';

[0048] Cover 54;

[0049] Fixed vertical plate 6, fixing part 61, first mounting hole 62;

[0050] Proximity switch 7, material conveyor 8, packaging film 9.

[0051] It should be noted that the drawings and the written description are not intended to limit the scope of the concept of the present invention in any way, but to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed implementation manners

[0052] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0053] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is 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 orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0054] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] Embodiment 1:

[0056] As Figure 1 shown, in this embodiment, a material position correction system is provided, which includes a conveyor belt 1, a corrector 5, and a PLC controller (not shown in the figure). This conveyor belt 1 refers to the conveyor belt of the packaging film 9. The material 3 is conveyed by a material conveyor 8 before entering the packaging film 9. The moving speed of the material 3 on the material conveyor 8 is greater than the moving speed of the packaging film 9. After the material 3 enters the packaging film 9, the conveyor belt 1 of the packaging film 9 drives the material 3 to move forward at a first speed. The corrector 5 is installed on one side or directly above the conveyor belt 1. One, two, or more pieces of the material 3 are packaged in each packaging film 9. The material 3 to be packaged first passes through the corrector 5 on the conveyor belt 1. After the front and rear positions of the material 3 entering the packaging film 9 are corrected, it is then cut and sealed by a sealing device 4.

[0057] As Figure 2 、 Figure 3 and Figure 4 shown, in this embodiment, the corrector 5 includes a fixing plate 51, a material blocking assembly 52, and a driving transmission assembly 53. The driving transmission assembly 53 is fixed on the fixing plate 51, and the material blocking assembly 52 is installed on the driving transmission assembly 53. After installation, the material blocking assembly 52 is located directly above the conveyor belt 1. Of course, according to different material correction requirements, the material blocking assembly 52 can also be located on one side of the conveyor belt 1 after installation. The PLC controller is used to control the actions of the material blocking assembly 52 and the driving transmission assembly 53.

[0058] Preferably in this embodiment, the driving transmission assembly 53 drives the material blocking assembly 52 to move closer to the conveyor belt 1 to block the material 3, move away from the conveyor belt 1 to release the material 3, and perform a reciprocating motion in the front-back direction. The position where the material blocking assembly 52 releases the material is configured such that the material 3 is within the range of the packaging film 9 (not shown in the figure). This range refers to the position between the two seals at both ends of the packaging film 9. More preferably, the material 3 is within the standard position range inside the packaging film 9. The "front" and "back" in this process refer to the front and back in the running direction of the conveyor belt 1, and the direction towards the sealing device 4 is "front".

[0059] More preferably in this embodiment, after the material 3 is conveyed onto the packaging film 9, the conveyor belt 1 drives the material 3 to move forward at a first speed. At this time, the moving speed of the material 3 is the same as that of the packaging film 9, and both move forward at the first speed. The PLC controller is used to control the material blocking assembly 52 to be in front of the material 3 when approaching the conveyor belt 1 when a group of materials 3 reaches the starting position of correction, so as to block the material 3 from the front of the material 3. At this time, the second speed of the material blocking assembly 52 moving in the forward direction is less than the first speed of the material 3 and the packaging film 9 moving.

[0060] In this embodiment, since the second speed of the material blocking assembly 52 is less than the first speed of the material 3 and the packaging film 9 moving, the moving speed of the material 3 is reduced, that is, the moving speed of the material 3 is lower than that of the packaging film 9. Furthermore, the position of the material 3 that is in the front position during feeding can be exactly within the standard position range inside the packaging film 9 (not shown in the figure) after being blocked. After the material blocking component 52 releases the material 3, the material 3 continues to move forward at the same first speed as the packaging film 9 to the sealing position.

[0061] When packaging one piece, two pieces or more than two pieces of materials 3 in one packaging film 9, this embodiment can be used to ensure that the position of the material 3 is exactly within the standard position range inside the packaging film 9. When a phenomenon such as forward slippage occurs during the feeding of ice cream, the speed of the ice cream in the front position is reduced by the material blocking component 52 to ensure that when the material blocking assembly 52 lifts up and separates from the ice cream, the ice cream is exactly within the standard position range of the packaging film 9.

[0062] In this embodiment, the starting position for controlling the material blocking assembly 52 to approach the conveyor belt 1 to block the material 3 is within the range after entering the packaging film 9, that is, the position of the material 3 is corrected after it has entered the packaging film 9, and then the material 3 continues to move forward to the sealing position at the same moving speed as the packaging film 9.

[0063] This embodiment can also be used to correct the situation where the relative positions of two or more pieces of material 3 shift during movement, that is, the positions of multiple pieces of material 3 are not aligned. The front material 3 will first be blocked by the material blocking component 52 and move forward with the material blocking component 52 at a second speed slower than that of the conveyor belt 1 or the packaging film 9. During this process, the moving speed of the front material 3 will decrease and be the same as the second speed at which the material blocking component 52 moves. The relatively rear material 3 still moves forward at the first speed, that is, the relatively rear material 3 will move forward faster than the front material 3. The rear material 3 will catch up with the front material 3, so that the front ends of the two pieces of material 3 are aligned. It is equivalent to using the material blocking component 52 to slow down the speed of the front material 3. After the two pieces of material 3 are aligned, then lift and release them, so that the two pieces of material 3 enter the standard position range of the packaging film 9 at the same time, and cut and seal at the position of the sealing device 4, realizing the position correction of the material 3 before sealing, thereby greatly improving the packaging efficiency and the finished product rate and ensuring the packaging quality.

[0064] For the case of packaging 3 or more pieces of material 3 in a packaging film 9, this correction device is also applicable. The material blocking component 52 is used to block directly in front of this group of materials 3. Since the second speed of the material blocking component 52 is slower than the first speed of the packaging film 9, the rear materials 3 will also converge towards the position of the front material blocking component 52, so that the positions of all materials 3 in this group are within the standard position range.

[0065] In this system, while blocking the material 3, the material blocking component 52 also moves along the advancing direction of the conveyor belt 1. In this way, during the advancing process of the material blocking component 52, it can be gradually lifted and the material 3 can be completely released at the standard position where the material 3 is released, which can ensure that the position of the material 3 after correction is the set standard position. Regardless of the thickness of the material 3, the position where the material 3 is released can be accurately controlled, and at the same time, it will not affect the production rhythm of packaging, further improving the packaging efficiency of the packaging machine.

[0066] In this embodiment, the fixing plate 51 can be directly fixed on the frame 2 of the packaging machine. In this embodiment, according to the relative installation position between the frame 2 of the packaging machine and the conveyor belt 1 and the position where the material 3 needs to be corrected, more preferably, the fixing plate 51 is fixed on the frame 2 through a fixing vertical plate 6.

[0067] Such as Figure 2 、 Figure 3 and Figure 4As shown in the figure, the material stop assembly 52 and the drive transmission assembly 53 are installed on the machine frame 2 through the fixed plate 51 and the fixed vertical plate 6. The shape and size of the fixed vertical plate 6 are determined according to its fixed position with the machine frame 2 and the movement position and movement height of the material stop assembly 52. After installation, the installation position of the material stop assembly 52 can complete the position correction of the material 3. The fixed plate 51 is connected to the machine frame 2 through the fixed vertical plate 6, which is convenient for the operator to replace different fixed vertical plates 6 according to different models, and then install the material stop assembly 52 at the appropriate correction position, which is convenient for transformation on the basis of the original packaging machine and has a lower transformation cost.

[0068] In this embodiment, the fixed vertical plate 6 is preferably an arc-shaped plate, with a fixing part 61 perpendicular to the surface of the arc-shaped plate at one end. Two first mounting holes 62 are opened on the fixing part 61 and are fixedly connected to the machine frame 2 through two bolts. For the convenience of installation, the two first mounting holes 62 are preferably oblong holes to facilitate the adjustment of the installation position. The other end of the fixed vertical plate 6 has a second mounting hole (not shown in the figure), and the second mounting hole is used to connect to the fixed plate 51.

[0069] In this embodiment, the drive transmission assembly 53 drives the material stop assembly 52 to perform a reciprocating motion above the conveyor belt 1 to realize a reciprocating process of approaching the conveyor belt 1 to block the material 3, moving in the front and back directions, and lifting away from the conveyor belt 1.

[0070] In this embodiment, the material stop assembly 52 moves downward to a height close to the conveyor belt 1 and is exactly in front of the material 3. The lowest blocking height of the material stop assembly 52 is above the conveyor belt 1 and does not fit on the conveyor belt 1 to protect the conveyor belt 1 from being impacted when the material stop assembly 52 moves downward.

[0071] As Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown in the figure, in this embodiment, the drive transmission assembly 53 includes a drive motor 531 and a transmission mechanism. The drive motor 531 is preferably a servo motor. The drive motor 531 is fixed to the fixed plate 51 by screws. An electromagnetic switch 532 is installed on the fixed plate 51 near the drive motor 531. The electromagnetic switch 532 is installed in the electromagnetic switch fixing strip 533, and the electromagnetic switch fixing strip 533 is fixed to the fixed plate 51 by screws.

[0072] In this embodiment, the transmission mechanism includes a double crank mechanism 534 and a motion mechanism 535 for driving the double crank mechanism 534 to move. The material stop assembly 52 is fixedly connected to the double crank mechanism 534, and the output shaft 5311 of the drive motor 531 is connected to the motion mechanism.

[0073] This embodiment provides an implementation manner of a motion mechanism. The motion mechanism 535 driving the double crank mechanism 534 includes a synchronous belt 5351 and two synchronous belt pulleys, namely a main synchronous belt pulley 5352 and a secondary synchronous belt pulley 5353. The output shaft 5311 of the driving motor 531 passes through the fixed plate 51 and is fixedly connected to the main synchronous belt pulley 5352 to drive the main synchronous belt pulley 5352 to rotate. A synchronous belt 5351 is installed on the main synchronous belt pulley 5352 and the secondary synchronous belt pulley 5353. The main synchronous belt pulley 5352 drives the secondary synchronous belt pulley 5353 to rotate synchronously through the synchronous belt 5351. The main synchronous belt pulley 5352 and the secondary synchronous belt pulley 5353 are respectively connected to the double crank through shafts, as Figure 5 shown. The output shaft 5311 of the driving motor 531 is simultaneously connected to the main synchronous belt pulley 5352 and the crank 5341 on the same side. The secondary synchronous belt pulley 5353 is connected to the crank 5341 on the same side through a connecting rod shaft 536.

[0074] In this embodiment, the double crank mechanism 534 is composed of two parallel cranks 5341 and a connecting arm 5342. The two cranks 5341 are respectively connected to the main synchronous belt pulley 5352 and the secondary synchronous belt pulley 5353 in the motion mechanism 535 through shafts. Specifically, the output shaft 5311 of the driving motor 531 is respectively connected to the main synchronous belt pulley 5352 and the crank 5341 on the same side through keys. Of course, the output shaft 5311 and the crank 5341 can also be connected by screws. The secondary synchronous belt pulley 5353 is connected to the connecting rod shaft 536 through a key. One end of the connecting rod shaft 536 is connected to the crank 5341 on the same side through a key or a screw. The other end of the connecting rod shaft 536 passes through the second mounting hole on the fixed plate 51 and the fixed vertical plate 6 and is fixedly connected to a nut 537. The connecting rod shaft 536 is rotatably connected to the mounting hole (not marked in the figure) on the fixed plate 51 and the second mounting hole on the fixed vertical plate 6 through bearings 538 respectively.

[0075] The connecting arm 5342 is simultaneously connected to the two cranks 5341 through a crank shaft 5343. The blanking assembly 52 is fixed on the connecting arm 5342. Each of the two cranks 5341 has two through holes. One is connected to the connecting rod shaft 536 or the output shaft 5311, and the other is connected to the crank shaft 5343. A bearing 5344 is installed between the crank shaft 5343 and the through hole on the crank 5341.

[0076] The output shaft 5311 of the driving motor 531 drives the main synchronous belt pulley 5352 and the crank 5341 on the same side to rotate, drives the secondary synchronous belt pulley 5353 to rotate synchronously through the synchronous belt 5351, and further drives the connecting rod shaft 536 to rotate synchronously. The connecting rod shaft 536 drives the other crank 5341 to rotate. When the two cranks 5341 rotate, they drive the connecting arm 5342 to move.

[0077] The two cranks 5341 rotate synchronously for one week, and the movement track of the connecting arm 5342 driving the material blocking member 52 is to move from the starting position of material blocking towards the direction close to the conveyor belt 1, move forward in the same direction as the conveyor belt 1, then lift and move away from the conveyor belt 1, and finally return to the starting position to form a reciprocating motion.

[0078] By controlling the center distance between the two through holes on the crank 5341, the standard descending height and the horizontal moving distance of the material blocking member 52 can be controlled. The time and speed of the synchronous rotation of the crank 5341 for one week match the conveying rhythm of each group of materials 3 on the conveyor belt 1.

[0079] Driven by the double-crank mechanism 534, during the process of the material blocking assembly 52 moving from the starting position to the releasing position, its movement track is an arc. In this way, the material blocking assembly 52 can be gradually lifted during the forward movement, and the material 3 can be completely released at the standard position of releasing the material 3, which can ensure that the position of the material 3 after correction is the set standard position. Regardless of the thickness of the material 3, the position of releasing the material 3 can be accurately controlled.

[0080] Such as Figure 2 、 Figure 3 and Figure 4 As shown, in this embodiment, the material blocking assembly 52 includes a first material blocking plate 521. The first material blocking plate 521 is located above the conveyor belt 1 and perpendicular to the moving direction of the conveyor belt 1, and is used to block the material 3 in front of the material 3. In this embodiment, the first material blocking plate 521 is vertically installed above the conveyor belt 1.

[0081] The first material blocking plate 521 can be directly connected to the connecting arm 5342 of the driving transmission assembly 53. In this embodiment, it is further preferred that the material blocking assembly 52 further includes a second material blocking plate 522. The first material blocking plate 521 is installed on the second material blocking plate 522, and the second material blocking plate 522 is fixed to the connecting arm 5342 of the driving transmission assembly 53.

[0082] In this embodiment, it is further preferred that the first material blocking plate 521 is slidably installed on the second material blocking plate 522 through a sliding pair 523. The first material blocking plate 521 can slide relative to the second material blocking plate 522 in the direction of approaching or departing from the conveyor belt 1, so as to automatically move upward when the first material blocking plate 521 moves downward and touches the material 3, and will not crush the material 3 below.

[0083] More preferably, the sliding pair 523 is composed of a linear slide rail 5231 and a slider 5232. The slider 5232 is fixed to the side of the first material baffle 521 by screws, and the linear slide rail 5231 is fixed to the side of the second material baffle 522 by screws. The slider 5232 and the linear slide rail 5231 extend in a direction perpendicular to the conveyor belt 1. The top of the second material baffle 522 has a bent mounting edge 5221, and two vertically extending oblong third mounting holes 5222 are provided on the mounting edge 5221. A fourth mounting hole (not marked in the figure) extending in the horizontal direction is provided on the connecting arm 5342. The mounting edge 5221 of the second material baffle 522 is fixedly connected to the connecting arm 5342 by bolts.

[0084] In this embodiment, a return spring 524 is further installed between the first material baffle 521 and the second material baffle 522. The initial length of the return spring 524 determines the relative height position between the first material baffle 521 and the second material baffle 522, ensuring that the first material baffle 521 can reach the standard height for blocking materials. When the position of the material 3 on the conveyor belt 1 deviates severely, when the first material baffle 521 moves downward and touches the material 3, at this time, when the first material baffle 521 continues to move downward along with the movement of the connecting arm 5342 and is blocked by the material 3, the first material baffle 521 will slide upward along the linear slide rail 5231. After moving a set distance and releasing the material 3, under the action of the return spring 524, the first material baffle 521 returns to its initial position.

[0085] As Figure 2 shown, in this embodiment, a cover 54 is also fixedly installed on the fixing plate 51. The side of the cover 54 is fixed to the fixing plate 51 by screws. The bottom of the cover 54 is open, and the bottom of the first material baffle 521 extends out of the cover 54. The double crank mechanism 534 and the motion mechanism 535 are covered in the cover 54, which not only plays a protective role but also makes the appearance neater.

[0086] During the actual production process, the production beat is generally about 200 cuts and seals of the packaging film 9 per minute. According to this beat, the time for the correction device to cycle once is adjusted to control the feeding interval and the feeding time point of each group of materials 3, such as appropriately increasing the feeding interval and advancing the feeding time point of each piece of material 3. In this embodiment, it is preferably to set the initial material blocking position of the material blocking assembly 52 at the position after the material 3 is loaded into the packaging film 9. The position where the material blocking assembly 52 follows the packaging film 9 and the material 3 to move forward and then lifts and releases the material 3 is exactly within the standard position range of the material 3 in the packaging film 9. For example, it is controlled that the front end of the material 3 is exactly at the standard position at the front end of the material 3 in the packaging film 9, that is, there is a standard margin between the front end of the material 3 and the sealing position of the packaging film 9.

[0087] In the actual production process, there are often cases of mating errors. For example, the feeding position of material 3 is too far forward, causing the position of material 3 on the packaging film 9 to be faster than the movement rhythm of the corrector. When the first baffle 521 moves downward, the time point is later than the time point when material 3 enters the starting position of correction. At this time, material 3 is directly below the first baffle 521. If the first baffle 521 moves downward normally, it will touch the lower material 3. If the group of uncorrected material 3 continues to move forward to the sealing position and the sealing device 4 performs cutting and sealing according to the normal procedure, it will cause damage to material 3 and at the same time cause damage to the sealing device 4.

[0088] Preferably in this embodiment, the correction device further has a response module for responding to the instruction that the baffle assembly 52 is blocked by material 3 and does not reach the specified height during the process of approaching the conveyor belt 1. After the sealing device 4 responds to the instruction, when the group of material 3 reaches the sealing position, the sealing device 4 does not act. This can effectively avoid damaging material 3 and the sealing device 4 and reduce the manufacturing cost.

[0089] As Figure 4 shown, further preferably in this embodiment, the response module is a proximity switch 7 installed on the baffle assembly 52. When the baffle assembly 52 is blocked by material 3 and does not reach the specified height during the process of approaching the conveyor belt 1, the proximity switch 7 is triggered. The trigger signal is transmitted to the sealing device 4 through the controller to control that when the group of material 3 reaches the sealing position, the sealing device 4 does not act.

[0090] Specifically, the proximity switch 7 is installed on the second baffle 522. When the first baffle 521 moves downward, it will touch material 3. At this time, when the first baffle 521 continues to move downward along with the movement of the connecting arm 5342 and is blocked by material 3, the first baffle 521 will slide upward along the linear slide rail 5231. When the first baffle 521 moves upward, the proximity switch 7 will be triggered. The proximity switch 7 emits a trigger signal and transmits it to the sealing device 4 through the PLC controller to control that when the group of material 3 reaches the sealing position, the sealing device 4 does not act, and the sealing device 4 does not cut or seal. This can effectively avoid damaging material 3 and the sealing device 4 and reduce the manufacturing cost.

[0091] Of course, the response module can also adopt a sensor to sense the position of material 3 and judge that the position of material 3 is exactly below the baffle assembly 52. The sensor transmits the signal to the PLC controller to control the sealing device 4 not to act.

[0092] This embodiment also provides a method for correcting the position of materials at the same time, including the following steps:

[0093] S1. The conveyor belt 1 moves forward at the first speed to convey material 3.

[0094] When the material 3 moves to the starting position for rectification, by controlling the material blocking component 52 in the rectifier 5, it approaches the conveyor belt 1 to block the material 3, moves away from the conveyor belt 1 to release the material 3, and makes a reciprocating motion in the front-back direction. During the process of the material blocking component 52 moving forward from the position of blocking the material 3 to the position of releasing the material 3, it moves at a second speed, and the second speed is less than the first speed. When the material blocking component 52 releases the material 3, the material 3 is located within the range of the packaging film 9.

[0095] Specifically, control the material blocking component 52 to complete a reciprocating motion between moving towards the conveyor belt 1 direction, moving forward, moving away from the conveyor belt 1 direction, and then moving back to the starting position in a cycle, so as to cyclically block in front of each group of materials 3 and rectify the position of each group of materials 3.

[0096] In step S2, it is further preferably that the material 3 is located within the standard position range in the packaging film 9.

[0097] Furthermore, control the driving motor 531 to start. The driving motor 531 controls the movement track of the first material blocking plate 521 through the double crank mechanism 534, and makes the beat of the reciprocating motion of the first material blocking plate 521 coincide with the movement beat of the material 3 on the conveyor belt 1. Control the first material blocking plate 521 to move towards the conveyor belt 1 until it reaches the specified height close to the conveyor belt 1, just blocking directly in front of the group of materials 3 on the conveyor belt 1, so as to reduce the moving speed of the material 3.

[0098] Since the second speed of the material blocking component 52 is less than the first speed of the movement of the material 3 and the packaging film 9, the moving speed of the material 3 is reduced. Furthermore, the position of the blocked material 3 can be exactly located within the standard position range in the packaging film 9 (not shown in the figure), and at the same time, the material 3 and the packaging film 9 continue to move forward to the sealing position 4 at the same first speed.

[0099] When two or more materials 3 need to be packaged in the packaging film 9, if the relative positions of the materials 3 shift during the movement, that is, the positions of multiple materials 3 are not aligned. The front material 3 will be blocked by the material blocking component 52 first and move forward with the material blocking component 52 at a speed slower than that of the packaging film 9. During this process, the moving speed of the front material 3 will decrease and be the same as the second speed of the movement of the material blocking component 52. The relatively rear material 3 still moves forward at the first speed, that is, the relatively rear material 3 will move forward at a speed faster than the front material 3. The rear material 3 will catch up with the front material 3, so that the front ends of the two materials 3 are aligned. It is equivalent to using the material blocking component 52 to slow down the speed of the front material 3. After the two materials 3 are aligned, then lift and release them, so that the two materials 3 enter the standard position range in the packaging film 9 at the same time, and cut and seal at the position of the sealing device 4.

[0100] When the film 9 to be packaged and the material 3 move forward together to the sealing position, the sealing device 4 cuts off the sealing packaging film 9 to complete the packaging of the material 3. As Figure 1 shown, the sealing device 4 includes a longitudinal sealing device 41 and a transverse sealing device 42, which are arranged on one side of the conveyor belt 1 in the front and back directions along the running direction of the conveyor belt 1. The material 3 in the packaging film 9 after position correction first reaches the longitudinal sealing device 41 to complete the longitudinal sealing of the packaging film 9, and then further moves to the position of the transverse sealing device 42 to complete the transverse cutting and sealing, finally completing the packaging of the material.

[0101] When the material blocking component 52 is blocked by the material 3 and does not move to the specified height during the process of approaching the conveyor belt 1, the proximity switch 7 is triggered, and the trigger signal is transmitted to the sealing device 4 through the controller to control that the sealing device 4 does not act when this group of materials 3 reaches the sealing position.

[0102] In the present invention, by controlling the material blocking component 52 to move back and forth above the conveyor belt 1 in a cyclic manner, the material 3 is pushed in the front and back directions by the material blocking component 52 before the packaging film 9 is sealed. By using the speed difference between the material blocking component 52 and the material 3, the position of the material 3 can be corrected, and the material 3 is placed within the range of the packaging film 9, ensuring that the front and back positions of the material 3 do not shift during sealing, which is beneficial to greatly improving the packaging efficiency and the finished product rate and reducing the manufacturing cost.

[0103] In the present invention, by providing a response module on the correction device for responding to the instruction that the material blocking component is blocked by the material and does not reach the specified height during the process of approaching the conveyor belt, the material 3 that has not been position-corrected does not perform the transverse sealing operation at the sealing device 4, which can effectively avoid damaging the material, further improve the finished product rate of the product, and at the same time can effectively avoid damaging the sealing device and reduce the manufacturing cost.

[0104] The present invention can be modified on the original packaging machine, and the corrector can be installed on the packaging machine by using the fixed vertical plate 6, and the modification cost is low.

[0105] Embodiment 2:

[0106] The difference from Embodiment 1 is that, as Figure 6 and Figure 7As shown in the figure, in this embodiment, another implementation of the motion mechanism is provided. The motion mechanism 535' includes a driving gear 5354' and a driven gear 5355'. The driven gear 5355' is connected to the crank 5341' through a connecting rod shaft 536'. The driving gear 5354' is connected to the output end 5311 of the driving motor 531 and is also connected to another crank 5341. The driving gear 5354' and the driven gear 5355' are meshed with each other through a plurality of transmission gears 5356'. The number of transmission gears 5356' is required to make the two cranks 5341 rotate synchronously and in the same direction. In this embodiment, one transmission gear 5356' is arranged between the driving gear 5354' and the driven gear 5355'.

[0107] The rotation of the driving motor 531 drives the rotation of the driving gear 5354'. The driven gear 5355' is driven to rotate synchronously through the transmission gear 5356'. When the driving gear 5354' and the driven gear 5355' rotate synchronously, the two cranks 5341 are driven to rotate synchronously, thereby driving the connecting arm 5342 to perform the same motion as described in the first embodiment, and finally driving the first baffle 521 to perform a reciprocating motion, realizing the correction of the material position.

[0108] Other structures are the same as those described in the first embodiment, and the correction process is also the same as that described in the first embodiment.

[0109] Embodiment Three:

[0110] As Figure 1 shown in the figure, in this embodiment, a packaging machine is provided, which includes a material conveyor 8, a conveyor belt 1 for a packaging film 9, a sealing device 4, and the above-mentioned corrector 5. The material 3 to be packaged is placed on the material conveyor 8. The corrector 5 is installed on one side of the conveyor belt 1. The first baffle 521 in the corrector 5 is installed just above the conveyor belt 1, or installed on one side of the conveyor belt 1 according to needs. The sealing device 4 includes a longitudinal sealing device 41 and a transverse sealing device 42, which are arranged on one side of the conveyor belt 1 in the front and back directions along the running direction of the conveyor belt 1. The material 3 aligned and loaded into the packaging film 9 first reaches the longitudinal sealing device 41 to complete the longitudinal sealing of the packaging film 9, and then further moves to the position of the transverse sealing device 42 to complete the transverse cutting and sealing.

[0111] When the proximity switch 7 on the second baffle 522 is triggered, the PLC controller controls the transverse sealing device 42 in the sealing device 4 not to act to avoid cutting the material 3.

[0112] The above are only the preferred embodiments of the present invention and do not impose any formal limitations on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art of this patent, without departing from the scope of the technical solution of the present invention, can make some changes or modifications using the technical content prompted above to form equivalent embodiments of equivalent changes. The implementation schemes in the above embodiments can be further combined or replaced. However, as long as the content does not depart from the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the present invention's solution.

Claims

1. A material position correction system, characterized in that Comprising: A conveyor belt for moving materials forward at a first speed; A corrector comprising a material blocking assembly and a drive transmission assembly for driving the material blocking assembly; A controller, the material blocking assembly is configured to approach the conveyor belt to block the materials, move away from the conveyor belt to release the materials, and perform a reciprocating motion in the front-back direction. During the process of the material blocking assembly moving forward from the material blocking position to the material releasing position, it moves at a second speed, and the second speed is less than the first speed. When the material blocking assembly releases the materials, the materials are located within the range of the packaging film.

2. The material position correction system according to claim 1, characterized in that: The material blocking assembly includes a first material blocking plate located above the conveyor belt and perpendicular to the moving direction of the conveyor belt, and the first material blocking plate is connected to the drive transmission assembly.

3. The material position correction system according to claim 2, wherein: The material blocking assembly further includes a second material blocking plate, the second material blocking plate is fixed to the drive transmission assembly, the first material blocking plate is slidably mounted on the second material blocking plate through a sliding pair, the first material blocking plate can slide relative to the second material blocking plate in a direction approaching or away from the conveyor belt, and a return spring is installed between the first material blocking plate and the second material blocking plate.

4. The material position correction system according to claim 1, wherein: The drive transmission assembly includes a drive motor and a transmission mechanism. The drive motor is fixed to the fixed plate. The transmission mechanism includes a double crank mechanism and a motion mechanism for driving the double crank mechanism to move. The material blocking assembly is fixedly connected to the double crank mechanism, and the output shaft of the drive motor is connected to the motion mechanism.

5. The material position correction system according to claim 4, characterized in that: The motion mechanism for driving the double crank mechanism includes a synchronous belt and two synchronous belt pulleys. The output shaft of the drive motor is fixedly connected to the main synchronous belt pulley and drives the main synchronous belt pulley to rotate. The main synchronous belt pulley drives the secondary synchronous belt pulley to rotate through the synchronous belt. The main synchronous belt pulley and the secondary synchronous belt pulley are respectively connected to the double crank through shafts; Or, the motion mechanism for driving the double crank mechanism includes a driving gear and a driven gear. The driving gear and the driven gear are respectively connected to the double crank through shafts. The output shaft of the drive motor is fixedly connected to the driving gear and drives the driving gear to rotate. The driving gear and the driven gear are meshed with each other through a plurality of transmission gears, and the number of transmission gears requires that the two cranks rotate synchronously and in the same direction.

6. The material position correction system according to any one of claims 1-5, characterized in that: The correction device further has a response module for responding to the instruction that the material blocking assembly is blocked by the materials and does not move to the specified height during the process of approaching the conveyor belt. After the sealing device receives the instruction, when the packaging film containing this group of materials reaches the sealing position, it does not perform the sealing action.

7. The material position correction system according to claim 6, wherein: The response module is a proximity switch installed on the material blocking assembly. When the material blocking assembly is blocked by the materials and does not move to the specified height during the process of approaching the conveyor belt, the proximity switch is triggered, and the trigger signal is transmitted to the sealing device through the controller.

8. A method for correcting the position of a material, characterized in that, Including the following steps: S1. Control the materials to move forward at a first speed; When the material moves to the correction position, control the material blocking component to approach the conveyor belt to block the material, move away from the conveyor belt to release the material, and perform a reciprocating motion in the front-back direction. When the material blocking component moves forward from the position of blocking the material to the position of releasing the material, it moves at a second speed, and the second speed is less than the first speed. When the material blocking component releases the material, the material is located within the range of the packaging film.

9. The material position correction method according to claim 8, characterized in that: When the material blocking component is blocked by the material and does not move to the specified height during the process of approaching the conveyor belt, control the sealing device not to perform the cutting and sealing actions when this group of materials reaches the sealing position.

10. A packaging machine, equipped with the material position correction system according to any one of claims 1-7, or adopting the material position correction method according to claim 8 or 9.

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