A continuous production and processing system for cushioning air bag inner bags

Abstract

The present invention relates to the technical field of inner bag forming and processing of cushioning inflatable bags, specifically to a continuous production and processing system for the inner bag of a cushioning inflatable bag, comprising an upper film unwinding mechanism, a lower film unwinding mechanism, a hole opening mechanism, a valve mounting mechanism, a first pressing mechanism, a second pressing mechanism and a cutting mechanism, wherein the hot pressing unit in the second pressing mechanism and the cutter in the cutting mechanism, when working, cooperate with the rotary conveying module to move synchronously with the inner bag at the same speed, by improving the structure of the rotary conveying module and the hot pressing unit, on the basis of the chain unit structure, in cooperation with the setting of the guide unit, the chain unit drives the hot pressing unit to work, and the hot pressing unit moves stably, and at the same time, the current flow of the hot pressing unit adopts a contact-type conduction structure, which makes the power supply circuit structure of the hot pressing unit simpler and more stable, avoids the problem of winding, optimizes the stability of the hot pressing sealing and pressing in the length direction of the inner bag, and improves the sealing quality.

Description

Technical Field

[0001] The invention relates to the technical field of inner bag forming and processing of cushioning air bags, in particular to a continuous production and processing system for inner bags of cushioning air bags. Background Art

[0002] The inner bag of the cushioning air bag is used to seal and store gas, so that the cushioning air bag has the ability to cushion impact. There are two existing ways to process the inner bag of the cushioning air bag. One is to overlap the upper and lower films for compounding, punch holes in the upper film and install an inflation valve, and then hot-press the upper and lower films on both sides to form a tubular film, and then hot-press and seal the two ends of the tubular film to form an inner bag. The other is to directly cut the tubular film, then punch holes to install the inflation valve, and then hot-press and connect the two ends to form an inner bag. Since the second type of tubular film has the problems of difficulty in opening holes and poor positioning accuracy when opening holes to install the inflation valve, the first processing method is now mostly used.

[0003] The present application is directed to a method for producing inner bags by overlapping and compounding upper and lower films. Existing methods for producing inner bags by overlapping and compounding upper and lower films often have the problem of intermittent extrusion, heating and sealing of the sealing composite parts when the upper and lower films are overlapped and compounded, which seriously affects the processing efficiency.

[0004] The applicant has previously applied for an invention patent with patent application number 202410553526.6 on May 7, 2024. The patent specifically discloses a cushioning inflatable bag inner bag processing equipment and processing technology. By adjusting the inner bag pressing processing method, the original intermittent lifting pressing is transformed into rotary pressing, so that the inner bag does not need to stop conveying, and the side and end can be pressed and sealed, thereby forming an inner bag, so that the inner bag processing can achieve continuous production.

[0005] However, according to the applicant's feedback, when the second pressing mechanism is driven by the chain rotating group to perform a rotational circulation, the chain rotating group has a structural instability problem, which cannot ensure the stable operation of the second pressing mechanism, resulting in a large difference in the quality of the hot pressing sealing of the two ends of the inner bag in the length direction by the second pressing mechanism, and a high defective rate of the formed inner bags. Summary of the Invention

[0006] In response to the above problems, the present invention provides a continuous production and processing system for the inner bags of cushioning inflatable bags. By improving the structure of the rotary conveying module and the hot pressing unit, on the basis of the chain unit structure, the guide unit is set up, so that when the chain unit drives the hot pressing unit to work, the hot pressing unit moves stably. At the same time, the current flow of the hot pressing unit adopts a contact-type conduction structure, which makes the power supply circuit structure of the hot pressing unit simpler and more stable, avoids the occurrence of problems such as winding, optimizes the stability of the hot pressing sealing in the length direction of the inner bag, and improves the sealing quality.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A continuous production and processing system for cushioning air bag inner bags, comprising an upper film unwinding mechanism, a lower film unwinding mechanism, a hole opening mechanism, a valve upper installation mechanism, a first pressing mechanism, a second pressing mechanism and a cutting mechanism;

[0009] The second pressing mechanism and the cutting mechanism are both mounted on a mounting plate. The second pressing mechanism comprises two sets of parallel hot pressing units, which are arranged along the width direction of the inner bag. The cutting mechanism comprises a cutter arranged between the hot pressing units, which is arranged parallel to the hot pressing units. When the hot pressing units and the cutters are in operation, they are moved synchronously with the inner bag at the same speed via a rotary conveying module, and the hot pressing units and the cutters are raised and lowered synchronously.

[0010] A positive contact unit and a negative contact unit are respectively provided on both sides of the inner bag conveying path of the mounting plate. When the two ends of the hot pressing unit contact the positive contact unit and the negative contact unit, the hot pressing unit is energized and generates heat.

[0011] The rotary conveying module includes a conveying motor, a chain unit and a guide unit. The conveying motor is installed on the mounting plate, and the conveying motor drives the chain unit to operate. The chain units are symmetrically arranged in two groups, and the chain units are respectively installed on both sides of the inner bag conveying path, and a rotating plate is provided between the chain units. The hot pressing unit and the cutter are both installed on the rotating plate, and the rotating plate rotates with the chain unit. The guide units are provided in two groups, and the guide units are arranged in a one-to-one correspondence with the chain units, and the guide units guide the movement of the rotating plate in the vertical and horizontal directions.

[0012] As an improvement, the hot pressing unit includes a hot pressing strip, an electric heating wire, an elastic contact head and a limit nut;

[0013] The heat press strip is square in shape, and a through-hole type mounting hole is opened on the upper side of the heat press strip along its length direction. The electric heating wire is inserted into the mounting hole. Both ends of the heat press strip and the electric heating wire are provided with threaded parts, and both ends of the electric heating wire are recessed inwardly to provide sockets.

[0014] The elastic contact heads are symmetrically mounted at both ends of the thermal strip, and a spring member is provided between the elastic contact head and the electric heating wire. The elastic contact head is elastically adjusted by the spring member. When the elastic contact head is pressed by the positive contact unit and the negative contact unit, the elastic contact head is inserted into the corresponding socket, and current flows through the electric heating wire.

[0015] The limiting nut cover is arranged on the elastic contact head, and the limiting nut is threadedly matched with the threaded portion to limit the elastic contact head and the spring member.

[0016] As an improvement, the end portion of the elastic contact head that contacts and squeezes the positive contact unit and the negative contact unit is a freely rotatable ball head.

[0017] As an improvement, the positive contact unit and the negative contact unit both include a wire, a conductive bar and an insulating rib;

[0018] The conductor is a live wire or a neutral wire, and the conductor is connected to the corresponding conductive strip;

[0019] The conductive strip is fixedly mounted on the mounting plate. The conductive strip is made of conductive material and has a groove recessed along its length. The groove is configured to roll with the ball head.

[0020] The insulating ribs are arranged at the upper and lower ends of the conductive strips.

[0021] As an improvement, the guide unit includes a guide post, a guide sleeve and a guide plate;

[0022] The guide pillars are symmetrically arranged on both sides of the chain unit along the conveying direction of the inner bag, and the guide pillars are arranged vertically;

[0023] The guide sleeves are each sleeved on the corresponding guide post, and the guide sleeves are slidably arranged along the guide post;

[0024] The guide plate is arranged between the guide sleeves, and the guide plate is arranged to move synchronously with the guide sleeves. A guide groove is arranged on the guide plate along its length direction. Both ends of the rotating plate are inserted into the guide grooves, and the rotating plate is arranged to move along the guide grooves.

[0025] As an improvement, two groups of bag-smoothing modules are symmetrically arranged at the two ends of the guide plate. The bag-smoothing modules are located between the two groups of guide plates, and as the guide plates descend, the bag-smoothing modules come into contact with the upper film of the inner bag to smooth out the corresponding inner bag.

[0026] The bag-smoothing module includes a bag-smoothing roller, a limiting arm, a limiting pin, a swing arm and an elastic stretching member. The two ends of the bag-smoothing roller are rotatably and swingingly installed on the corresponding guide plates. The part where the bag-smoothing roller contacts the inner bag can be freely rotated. The limiting arm is installed at the two ends of the rotating shaft of the bag-smoothing roller. The limiting arm conflicts with the limiting pin set on the guide plate to limit the swing angle of the bag-smoothing roller. The swing arm is set at the two ends of the rotating shaft of the bag-smoothing roller. The swing arm is located on the outside of the limiting arm, and the elastic stretching member for elastic stretching is connected between the swing arm and the guide plate.

[0027] As an improvement, the chain unit includes a sprocket and a chain. There are four groups of sprockets, which are arranged in a square. The chain is wound around the sprocket. Any link on the chain is connected to the rotating plate, and the chain includes a working section and a rotating section. The working section is arranged parallel to the conveying direction of the inner bag, and the working section is located at the lower part of the chain. The rotating section is connected to the end of the working section.

[0028] As an improvement, the path length S1 of the rotary plate driven by the chain unit to rotate one circle and the length S2 of a single inner bag satisfy the relationship: S1=S2.

[0029] As an improvement, the rotary plate is equipped with a lifting module for driving the hot pressing unit and the cutter to move up and down, and the lifting module includes a lifting element and a lifting plate;

[0030] The lifting element is installed on the rotary plate, and the lifting element is pushed downward;

[0031] The lifting plate is installed at the pushing end portion of the lifting element, and the hot pressing unit and the cutter are installed on the lower end surface of the lifting plate.

[0032] As an improvement, a visual identifier is installed on the top of the mounting plate, which identifies the valve on the inner bag conveyed below and transmits a signal to the lifting module to control the lifting module to drive the hot pressing unit and the cutter to descend and contact the inner bag;

[0033] A photoelectric sensor is installed at the lower part of the mounting plate. The photoelectric sensor is located at the tail end of the working section. The photoelectric sensor senses the lifting module and transmits a signal to the lifting module to control the lifting module to drive the hot pressing unit and the cutter to lift.

[0034] A wedge-shaped guide platform is provided at the lifting and lowering positions of the lifting module, and the slope surface of the guide platform contacts and guides the end of the elastic contact head.

[0035] The beneficial effects of the present invention are:

[0036] (1) The present invention improves the rotary conveying module. On the basis of the chain unit structure, the guide unit is arranged so that when the chain unit drives the hot pressing unit to perform a circular flow, the hot pressing unit moves stably and does not shake due to the chain unit. This ensures that when the hot pressing unit contacts the inner bag for hot pressing and sealing, the upper and lower parts are heat-bonded stably and firmly, thereby improving the sealing quality of the inner bag and reducing the defective rate of the inner bag.

[0037] (2) The present invention improves the hot pressing unit and adopts a contact-type conduction structure, which makes the power supply circuit structure of the hot pressing unit simpler and more stable, avoiding the occurrence of problems such as winding, while ensuring the stability of the current flow of the hot pressing unit, so that the temperature of the hot pressing unit is maintained constant, optimizing the quality of the hot pressing sealing in the longitudinal direction of the inner bag, and improving the sealing quality of the inner bag;

[0038] (3) When the present invention adopts a contact-type conduction structure, a concave groove is provided at the connection portion between the conductive strip and the elastic contact head, and the ball head structure of the elastic contact head is matched, so that the conductive strip and the elastic contact head have a sufficient contact surface to flow a large current, while the elastic contact head can still roll along the groove, thereby adapting the movement of the hot pressing unit to the synchronous speed of the conveying of the inner bag, thereby realizing the movable sealing of the inner bag by the hot pressing unit;

[0039] (4) Before the hot pressing unit performs hot pressing and sealing on the inner bag, the present invention utilizes the movement of the guide unit when guiding the hot pressing unit to descend, and cooperates with the setting of the bag smoothing module to roll, pull and smooth the upper film of the inner bag, thereby eliminating wrinkles on the upper film of the inner bag and eliminating the air retained inside the inner bag. At the same time, the bag smoothing module will not interfere with the transportation of the inner bag, and the inner bag can still maintain normal transportation, further improving the molding quality of the inner bag sealing, so that the inner bag will not retain air inside, thereby avoiding residual seams during sealing.

[0040] In summary, the present invention has the advantages of high quality of formed cushioning and inflatable inner bags, low defective rate, reduced structure, and low leakage rate at the sealing position of the inner bag, and is particularly suitable for the field of cushioning and inflatable inner bag forming processing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a schematic diagram of the front view of the production and processing system of the present invention;

[0042] Figure 2 Schematic diagram of the working state of the second pressing mechanism and the cutting mechanism of the present invention;

[0043] Figure 3 Schematic diagram of the cross-sectional structure of the second pressing mechanism and cutting mechanism of the present invention;

[0044] Figure 4 It is a partial cross-sectional structural diagram of the second pressing mechanism and the cutting mechanism of the present invention;

[0045] Figure 5 This is a schematic cross-sectional view of the rotary conveying module of the present invention;

[0046] Figure 6 This is a schematic diagram of the connection structure of the hot pressing unit, cutter and lifting module of the present invention;

[0047] Figure 7 It is a side structural schematic diagram of the second pressing mechanism and cutting mechanism of the present invention;

[0048] Figure 8 A schematic diagram of the current flow path of the hot pressing unit of the present invention;

[0049] Figure 9 Schematic diagram of the cross-sectional structure of the hot pressing unit of the present invention;

[0050] Figure 10 for Figure 10 A in the middle is an enlarged structural diagram;

[0051] Figure 11 This is a schematic diagram of the three-dimensional structure of the end portion of the hot press strip of the present invention;

[0052] Figure 12 This is a schematic diagram of the three-dimensional structure of the elastic contact head of the present invention;

[0053] Figure 13 Schematic diagram of the side structure of the positive electrode contact unit and the negative electrode contact unit of the present invention;

[0054] Figure 14 Schematic diagram of the three-dimensional structure of the bag-smoothing module of the present invention;

[0055] Figure 15 for Figure 14 The enlarged structural diagram at B in the middle;

[0056] Figure 16 for Figure 14 Enlarged structural diagram at point C in the middle.

[0057] In the figure: upper film unwinding mechanism 1, inner bag 10, mounting plate 100, valve 101, buffer section 123, lower film unwinding mechanism 2, opening mechanism 3, valve mounting mechanism 4, first pressing mechanism 5, second pressing mechanism 6, hot pressing unit 61, hot pressing strip 611, electric heating wire 612, elastic contact head 613, limit nut 614, mounting hole 615, threaded portion 616, jack 617, spring member 618, ball head 619, positive contact unit 62, negative contact unit 63, wire 621, conductive strip 622, insulating rib 623, groove 624, cutting mechanism 7 , cutter 71, rotary conveying module 8, conveying motor 81, chain unit 82, sprocket 821, chain 822, working section 8221, rotary section 8222, guide unit 83, guide column 831, guide sleeve 832, guide plate 833, guide groove 834, rotary plate 84, lifting module 85, lifting element 851, lifting plate 852, guide platform 853, bag smoothing module 9, bag smoothing roller 91, limiting arm 92, limiting pin 93, swing arm 94, elastic stretching member 95, movable carrier plate 400, motor module 401, visual identifier 200, photoelectric sensor 300. DETAILED DESCRIPTION

[0058] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0059] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying 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 orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0060] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0061] Example 1:

[0062] like Figures 1 to 16 As shown, a continuous production and processing system for cushioning inflatable bag inner bags includes an upper film unwinding mechanism 1, a lower film unwinding mechanism 2, a hole opening mechanism 3, a valve upper mounting mechanism 4, a first pressing mechanism 5, a second pressing mechanism 6 and a cutting mechanism 7. Among them, the structures of the upper film unwinding mechanism 1, the lower film unwinding mechanism 2, the hole opening mechanism 3, the valve upper mounting mechanism 4 and the first pressing mechanism 5 are similar to the structures disclosed in the invention patent application number 202410553526.6. Among them, the hole opening mechanism 3 is to use a circular hole-shaped cutter to cooperate with the upper end of the inner bag to insert the circular hole-shaped cutter into the upper end of the inner bag. The supporting plate between the membrane and the lower membrane realizes the opening of the upper mold, and the valve loading mechanism sorts the valves through the vibration plate and then transports them between the upper and lower membranes, and uses the lifted supporting seat to cooperate with the descending hot pressure head to realize the hot pressing loading between the valve and the upper mold. Therefore, this application will not be described in detail here. The specific working principle is also disclosed in detail in the invention patent of an integrated molded cushioning inflatable bag and its manufacturing method applied for by the applicant's Shanghai parent company, Shanghai Automate Logistics Equipment Co., Ltd. on March 6, 2024.

[0063] It should be emphasized here that, in the continuous production and processing system of the cushioning inflatable bag inner bag of the present application, the conveying speed V1 of the inner bag, upper film or lower film conveyed at the hole-opening mechanism 3 and the valve-loading mechanism 4 is greater than the conveying speed V2 of the inner bag, upper film or lower film at the subsequent first pressing mechanism 5, the second pressing mechanism 6 and the cutting mechanism 7. Specifically, when the hole-opening mechanism 3 and the valve-loading mechanism 4 perform hole-opening or valve-installing on the upper film, the upper film and the lower mold need to stop conveying, while the first pressing mechanism 5, the second pressing mechanism 6 and the cutting mechanism 7 are continuously processed. There is a speed difference between the two parts. Only when the conveying speed of the hole-opening mechanism 3 and the valve-loading mechanism 4 is greater than the conveying speed of the first pressing mechanism 5, the second pressing mechanism 6 and the cutting mechanism 7 can this speed difference be compensated.

[0064] In addition, in addition to the speed difference method, the hole-opening mechanism 3 and the valve-mounting mechanism 4 can also be set as a reciprocating conveying structure set along the conveying direction of the upper film. When the hole-opening mechanism 3 and the valve-mounting mechanism 4 respectively perform hole-opening and valve installation on the upper film, the hole-opening mechanism 3 and the valve-mounting mechanism 4 realize the same direction and speed conveyance as the upper film through a linear motor module or other linear conveying mechanism. After completing the hole-opening and valve installation, the hole-opening mechanism 3 and the valve-mounting mechanism 4 return to the initial work station and wait for the start of the next hole-opening and valve installation work. The above two methods can realize the continuous processing of the first pressing mechanism 5, the second pressing mechanism 6 and the cutting mechanism 7 in this application.

[0065] The present application preferably adopts a speed difference method to coordinate the processing rhythm between the opening mechanism 3, the valve upper mounting mechanism 4 and the first pressing mechanism 5, the second pressing mechanism 6 and the cutting mechanism 7, and a buffer section 123 is provided between the valve upper mounting mechanism 4 and the first pressing mechanism 5. The buffer section 123 is used to coordinate the front and rear speed difference. The principle of setting the buffer section is to use a group of freely rising and falling conveying rollers, and the upper film and the lower film are wound on the conveying rollers. The conveying rollers are lifted and lowered by themselves to achieve the adjustment of the front and rear conveying speeds.

[0066] It should be emphasized that, according to the applicant's statement, the composite structure of the second pressing mechanism and the cutting mechanism disclosed in the invention patent with application number 202410553526.6, when the inner bag is subjected to rotational continuous processing through the chain rotating mechanism, due to the poor stability of the chain rotating mechanism, when the chain rotating mechanism is used to drive the second pressing mechanism and the cutting mechanism to work, there will be many problems affecting the quality of the inner bag, such as poor sealing effect of the hot pressing strip on the inner bag, and incomplete cutting of the inner bag by the cutter.

[0067] Therefore, the applicant made adjustments based on the invention patent application number 202410553526.6. The adjusted structure is as follows:

[0068] The second pressing mechanism 6 and the cutting mechanism 7 in the present application are both mounted on the mounting plate 100. The second pressing mechanism 6 includes two sets of parallel hot pressing units 61, which are arranged along the width direction of the inner bag 10. The cutting mechanism 7 includes a cutter 71 arranged between the hot pressing units 61. The cutter 71 is elastically retractable and arranged parallel to the hot pressing units 61. When the hot pressing units 61 and the cutter 71 are working, they are moved synchronously with the inner bag 10 at the same speed through the rotary conveying module 8, and the hot pressing units 61 and the cutter 71 are raised and lowered synchronously.

[0069] Among them, the rotary conveying module 8 includes a conveying motor 81, a chain unit 82 and a guide unit 83. The conveying motor 81 is installed on the mounting plate 100. The conveying motor 81 drives the chain unit 82 to operate. The chain unit 82 is symmetrically arranged in two groups. The chain units 82 are respectively installed on both sides of the conveying path of the inner bag 10, and a rotating plate 84 is arranged between the chain units 82. The hot pressing unit 61 and the cutter 71 are both installed on the rotating plate 84. The rotating plate 84 rotates with the chain unit 82. The guide unit 83 is provided with two groups. The guide unit 83 is arranged in a one-to-one correspondence with the chain unit 82, and the guide unit 83 guides the movement of the rotating plate 84 in the vertical and horizontal directions.

[0070] More specifically, the chain unit 82 includes a sprocket 821 and a chain 822. The sprocket 821 is provided with four groups. The sprockets 821 are arranged in a square shape. The chain 822 is wound on the sprocket 821. Any link on the chain 822 is connected to the rotary plate 84, and the chain 822 includes a working section 8221 and a rotary section 8222. The working section 8221 is arranged parallel to the conveying direction of the inner bag 10, and the working section 8221 is located at the lower part of the chain 822. The rotary section 8222 is connected to the tail of the working section 8221. At the working section 822, the hot pressing unit 61 and the cutter 71 are in contact with the upper film of the inner bag to perform hot pressing and cutting processing on the inner bag. After processing, the hot pressing unit 61 and the cutter 71 are rotated and conveyed to the initial position through the rotary section 8222, and the next inner bag is also synchronously conveyed to the initial position.

[0071] It should be emphasized here that when the chain 822 in the present application is connected to the rotating plate 84, it is connected to the rotating plate 84 through the side wall of the chain link, and the connection part between the side wall of the chain link and the rotating plate 84 can be rotatably set, that is, in the process of the chain 822 dragging the rotating plate 84 to perform a rotation cycle, the rotating plate 84 is always in a horizontal state under the action of the guide unit 83.

[0072] Among them, the path length S1 of the rotating plate 84 driven by the chain unit 82 to rotate one circle and the length S2 of a single inner bag 10 satisfy the relationship: S1=S2, thereby realizing continuous operation of the hot pressing unit 61 and the cutter 71 set on the rotating plate 84.

[0073] Furthermore, the guide unit 83 includes a guide post 831 , a guide sleeve 832 and a guide plate 833 ;

[0074] The guide posts 831 are symmetrically arranged on both sides of the chain unit 82 along the conveying direction of the inner bag 10, and the guide posts 831 are vertically arranged;

[0075] The guide sleeves 832 are sleeved on the corresponding guide posts 831, and the guide sleeves are slidably arranged along the guide posts 831;

[0076] The guide plate 833 is arranged between the guide sleeves 832, and the guide plate 833 is moved synchronously with the guide sleeves 832. A guide groove 834 is provided on the guide plate 833 along its length direction. Both ends of the rotating plate 84 are passed through the guide grooves 834, and the rotating plate 84 is moved along the guide grooves 834.

[0077] Furthermore, a lifting module 85 is installed on the rotary plate 84 to drive the hot pressing unit 61 and the cutter 71 to move up and down. The lifting module 85 includes a lifting element 851 and a lifting plate 852.

[0078] The lifting element 851 is installed on the rotating plate 84. The lifting element 851 is pushed downward. The lifting element 851 can be a pneumatic or electric lifting element. When it is a pneumatic lifting element, the lifting element 851 is a cylinder. When it is an electric lifting element, the lifting element 851 is an electric push cylinder. In this application, the lifting element 851 is preferably a cylinder. The air supply pipe of the lifting element 851 extends outward from the rotating plate 84. It should be emphasized that the air supply pipe needs to pass through the rotating circle of the chain 822, and the air supply pipe needs to be of sufficient length so that it can move with the rotating plate 84 when the rotating plate 84 rotates.

[0079] The lifting plate 852 is installed on the pushing end of the lifting element 851. The hot pressing unit 61 and the cutter 71 are installed on the lower end surface of the lifting plate 852. A spring that allows the cutter to elastically expand and contract is provided between the cutter 71 and the installation position of the lifting plate 852. When the cutter 71 cuts the inner bag 10, the spring applies pressure generated by deformation to the cutter 71, so that the cutter 71 cuts the inner bag 10.

[0080] It should be noted that the present application adds a guide unit 83 on the basis of the chain unit 82. When the chain unit 82 drives the hot pressing unit 61 and the cutter 71 to contact the inner bag and start the sealing process and cutting work respectively, the rotary plate 84 uses the guide structure of the guide plate 833 to make the hot pressing unit 61 and the cutter 71 move synchronously and at the same speed as the inner bag. The hot pressing unit 61 and the cutter 71 will not be affected by the tension of the chain in the chain unit 82, resulting in imbalance, jumping, etc. when the hot pressing unit 61 and the cutter 71 move horizontally.

[0081] Specifically, when the hot pressing unit 61 and the cutter 71 are in contact with the inner bag and perform hot pressing sealing and cutting respectively, the sprocket in the chain unit 82 is rotating, dragging the rotating plate 84 to move horizontally. During the horizontal movement, the rotating plate 84 is guided by the guide groove 834 on the guide plate 833, which completely avoids the vertical fluctuation of the rotating plate 84 caused by the tightness of the chain. Even if the chain becomes loose, the rotating plate 84 will still move horizontally along the setting direction of the guide groove 834.

[0082] like Figures 14 to 16As shown, at the same time, unlike the existing chain-type rotary conveying mechanism, when the rotary plate 84 is dragged by the chain to move upward and rotate, the guide plate 833 also moves up and down. Through the lifting and lowering movement of the guide plate 833, in conjunction with the setting of the bag smoothing module 9, the inner bag can be smoothed by the bag smoothing module 9 before the hot pressing unit 61 and the cutter 71 contact the inner bag to perform hot pressing sealing and cutting respectively.

[0083] Specifically, two groups of bag smoothing modules 9 are symmetrically provided at both ends of the guide plate 833. The bag smoothing modules 9 are located between the two groups of guide plates 833. As the guide plates 833 descend, the bag smoothing modules 9 contact the upper film of the inner bag 10 to smooth the corresponding inner bag 10.

[0084] The bag-smoothing module 9 includes a bag-smoothing roller 91, a limiting arm 92, a limiting pin 93, a swing arm 94 and an elastic stretching member 95. The two ends of the bag-smoothing roller 91 are rotatably and swingably installed on the corresponding guide plate 833. The part where the bag-smoothing roller 91 contacts the inner bag 10 can be freely rotated. The limiting arm 92 is installed at the two end parts of the rotating shaft of the bag-smoothing roller 91. The limiting arm 92 conflicts with the limiting pin 93 set on the guide plate 833 to limit the swing angle of the bag-smoothing roller 91. The swing arm 94 is set at the two end parts of the rotating shaft of the bag-smoothing roller 91. The swing arm 94 is located on the outside of the limiting arm 92, and the elastic stretching member 95 for elastic stretching is connected between the swing arm 94 and the guide plate 833.

[0085] When the guide plate 833 is dragged by the chain and descends to the working section, the bag smoothing roller 91 will contact the inner bag before the hot pressing unit 61 and the cutter 71. Through the gravity of the guide plate 833, the bag smoothing roller 91 will open to both sides of the length direction of the inner bag, and smooth the inner bag that is about to be hot-pressed, sealed and cut. At the same time, the rolling positioning of the inner bag by the bag smoothing roller 91 can eliminate the influence of the speed difference at the front opening mechanism 3 and the valve upper installation mechanism 4 on the operation of the hot pressing unit 61 and the cutter 71, thereby ensuring the quality of the inner bag sealing and slitting.

[0086] When the guide plate 833 is lifted again by the drag of the chain, the bag-pushing roller 91 is swung back to its original position by the elastic force of the elastic stretching member 95 . When the limiting arm 92 contacts the limiting pin 93 , the bag-pushing roller 91 is completely reset.

[0087] It should also be noted that when the hot pressing unit 61 and the cutter 71 process the inner bag, they also cooperate through the movable supporting plate 400 provided under the inner bag, and the movable supporting plate 400 is used to move and support the inner bag, so that the hot pressing unit 61 and the cutter 71 are lowered onto the movable supporting plate 400. At the same time, the movable supporting plate 400 is moved synchronously and at the same speed as the inner bag through the provided linear motor module 401. After the inner bag is processed, the movable supporting plate 400 is moved in the opposite direction and reset through the linear motor module. In this way, when the hot pressing unit 61 and the cutter 71 descend to work, there will be no relative displacement between the hot pressing unit 61 and the cutter 71 and the support plate or support platform under the inner bag, which will cause wear of the inner bag and the cutter.

[0088] Example 2:

[0089] With reference to Example 1, the difference between Example 2 and Example 1 is described as follows:

[0090] like Figures 8 to 13 As shown, the mounting plate 100 is provided with a positive contact unit 62 and a negative contact unit 63 on both sides of the inner bag 10 conveying path. When the two ends of the hot pressing unit 61 contact the positive contact unit 62 and the negative contact unit 63, the hot pressing unit 61 is energized and heated, and the current flows to the positive contact unit 62, through the hot pressing unit 61, and then out of the negative contact unit 63.

[0091] Specifically, the hot pressing unit 61 includes a hot pressing strip 611, an electric heating wire 612, an elastic contact head 613 and a limiting nut 614;

[0092] The hot press strip 611 is square in shape and is made of heat-conducting metal material, such as copper, aluminum and other metal materials. A through-hole type mounting hole 615 is opened along the length direction of the hot press strip 611, and the electric heating wire 612 is inserted into the mounting hole 615. Both ends of the hot press strip 611 and the electric heating wire 612 are provided with threaded parts 616, and the two ends of the electric heating wire 612 are recessed inwardly and provided with insertion holes 617. When the inner bag is hot-pressed and sealed, the lower end plane of the hot press strip 611 contacts the inner bag for heat sealing. The two ends of the electric heating wire 612 are connected to the positive contact unit 62 and the negative contact unit 63 through elastic contact heads 613, so that the energized electric heating wire 612 generates heat, and the heat is transferred to the hot press strip 611. Finally, the heat is transferred to the inner bag through the hot press strip 611, so that the inner bag is heated, and the upper film and the lower mold are bonded to achieve a sealing effect.

[0093] The elastic contact head 613 is symmetrically installed at both ends of the thermal pressure strip 611. There is a spring member 618 between the elastic contact head 613 and the electric heating wire 612, and the elastic contact head 613 is elastically adjusted by the spring member 618. When the elastic contact head 613 is squeezed by the positive contact unit 62 and the negative contact unit 63, the elastic contact head 613 is inserted into the corresponding socket 617, and current flows through the electric heating wire 612. The end of the elastic contact head 613 corresponding to the socket 617 is arranged in an expansion head structure. After the elastic contact head 613 is inserted into the socket 617, the expansion head forms good contact with the inner wall of the socket 617 to ensure the flow of current. After the squeezing force of the elastic contact head 613 is eliminated, the expansion head 613 is inserted into the socket 617. The elastic contact head 613 relies on the elastic force of the spring member 618 to pull the elastic contact head 613 out of the socket 617 to achieve power-off processing; and the end of the elastic contact head 613 that contacts and squeezes the positive contact unit 62 and the negative contact unit 63 is a freely rotatable ball head 619. When the hot pressing unit 6 moves along the positive contact unit 62 and the negative contact unit 63, the wear of the elastic contact head 613 can be avoided. Specifically, a concave spherical groove is provided at the end of the elastic contact head 613 that contacts and squeezes the positive contact unit 62 or the negative contact unit 63. The ball head 619 is half-covered by the spherical groove and is freely rotatable in the spherical groove. At the same time, the ball head 619 is made of conductive metal material, such as metallic silver or metallic copper.

[0094] The limiting nut 614 is covered on the elastic contact head 613 , and the limiting nut 614 is threadedly matched with the threaded portion 616 to limit the elastic contact head 613 and the spring member 618 .

[0095] When assembling the hot pressing unit 61, the electric heating wire 612 is inserted into the socket 617 on the hot pressing strip 611, so that the threaded parts 616 at the two ends of the hot pressing strip 611 and the electric heating wire 612 are just connected. Then the elastic contact head 613 is installed in the limiting nut 614, and the spring part 618 is sleeved on the elastic contact head 613. Then the limiting nut 614 is locked to the threaded part 616. The limiting nut 614 connects the electric heating wire 612 and the hot pressing strip 611 through threaded cooperation. At the same time, the ball head 619 on the elastic contact head 613 is located outside the limiting nut 614, and the other end with an expansion head structure is located inside the limiting nut 614.

[0096] In addition, the positive contact unit 62 and the negative contact unit 63 each include a wire 621 , a conductive bar 622 and an insulating rib 623 ;

[0097] The wire 621 is a live wire or a neutral wire, and the wire 621 is connected to the corresponding conductive strip 622, that is, the wire 621 in the positive contact unit 62 is the live wire, and the wire 621 in the negative contact guide 63 is the neutral wire, and a ground wire is also provided on the mounting plate 100;

[0098] The conductive strip 622 is fixedly mounted on the mounting plate 100. The conductive strip 622 is made of a conductive material, such as a copper strip or a silver strip. A groove 624 is provided along the length of the conductive strip 622. The groove 624 is configured to roll with the ball head 619. The groove 624 can expand the direct contact area between the ball head 619 and the conductive strip 622, thereby ensuring the passage of a large current.

[0099] In addition, insulating ribs 623 are provided at the upper and lower ends of the conductive bar 622 , and the insulating ribs 623 are used to protect the conductive bar 622 to avoid danger when power is supplied.

[0100] Example 3:

[0101] With reference to Example 1 and Example 2, the differences between Example 3 of the present invention and Example 1 and Example 2 are as follows:

[0102] like Figure 4 、 7 As shown in Figures 14 and 15, a visual identifier 200 is installed on the top of the mounting plate 100. The visual identifier 200 identifies the valve 101 on the inner bag 10 conveyed below and transmits a signal to the lifting module 85 to control the lifting module 85 to drive the hot pressing unit 61 and the cutter 71 to descend and contact the inner bag 10. Specifically, the valve 101 is just located on the inner bag 10 close to the end that needs to be sealed and cut, and the valve 101 passes through the visual identifier 200 before the end that needs to be sealed and cut. The visual identifier 200 uses the valve 101 as a visual recognition reference, and can accurately identify the conveying status of the inner bag, better control the lifting module 85 to drive the hot pressing unit 61 and the cutter 71 to descend, seal and cut the inner bag, and ensure that the error in the length dimension of each group of inner bags meets the processing standard.

[0103] A photoelectric sensor 300 is installed at the lower part of the mounting plate 100. The photoelectric sensor 300 is located at the tail end of the working section 8221. The photoelectric sensor 300 senses the lifting module 85 and transmits a signal to the lifting module 85 to control the lifting module 85 to drive the hot pressing unit 61 and the cutter 71 to lift. Specifically, a light emitter is provided on the opposite side of the photoelectric sensor 300. During normal operation, the photoelectric sensor 300 always receives the light emitted by the light emitter on the opposite side. When the hot pressing unit 61 is located between the photoelectric sensor 300 and the light emitter, the light is blocked and the photoelectric sensor 300 cannot receive the light emitted by the light emitter on the opposite side. At this time, the photoelectric sensor 300 sends an electrical signal to the control module, which feeds back to the lifting module 85 to control the lifting module 85 to reset.

[0104] A wedge-shaped guide platform 853 is provided at the lifting and lowering positions of the lifting module 85. The slope surface of the guide platform 853 contacts and guides the end of the elastic contact head 613, thereby forming a pre-compression process when the elastic contact head 613 is compressed. This can avoid the vibration of the elastic contact head 613 caused by the instantaneous release of the elastic contact head 613 and improve the stability of the elastic contact head 613.

[0105] 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 continuous production and processing system for cushioning air bag inner bags, comprising an upper film unwinding mechanism (1), a lower film unwinding mechanism (2), a hole opening mechanism (3), a valve mounting mechanism (4), a first pressing mechanism (5), a second pressing mechanism (6) and a cutting mechanism (7), characterized in that: The second pressing mechanism (6) and the cutting mechanism (7) are both mounted on the mounting plate (100), the second pressing mechanism (6) comprising two sets of parallel hot pressing units (61), the hot pressing units (61) being arranged along the width direction of the inner bag (10), the cutting mechanism (7) comprising a cutter (71) arranged between the hot pressing units (61), the cutter (71) being arranged parallel to the hot pressing units (61), the hot pressing units (61) and the cutter (71) being arranged to move synchronously with the inner bag (10) at the same speed through the rotary conveying module (8) when the hot pressing units (61) and the cutter (71) are in operation, and the hot pressing units (61) and the cutter (71) are arranged to rise and fall synchronously; A positive contact unit (62) and a negative contact unit (63) are respectively provided on both sides of the inner bag (10) conveying path on the mounting plate (100); when the two ends of the hot pressing unit (61) collide with the positive contact unit (62) and the negative contact unit (63), the hot pressing unit (61) is energized and generates heat; The rotary conveying module (8) includes a conveying motor (81), a chain unit (82) and a guide unit (83). The conveying motor (81) is installed on the mounting plate (100). The conveying motor (81) drives the chain unit (82) to operate. The chain unit (82) is symmetrically arranged in two groups. The chain units (82) are respectively installed on both sides of the conveying path of the inner bag (10), and a rotating plate (84) is arranged between the chain units (82). The hot pressing unit (61) and the cutter (71) are both installed on the rotating plate (84). The rotating plate (84) rotates cyclically with the chain unit (82). The guide unit (83) is provided with two groups. The guide units (83) are arranged in a one-to-one correspondence with the chain units (82), and the guide units (83) guide the movement of the rotating plate (84) in the vertical direction and the horizontal direction. The guide unit (83) includes a guide column (831), a guide sleeve (832) and a guide plate (833); The guide pillars (831) are symmetrically arranged on both sides of the chain unit (82) along the conveying direction of the inner bag (10), and the guide pillars (831) are all arranged vertically; The guide sleeves (832) are sleeved on the corresponding guide posts (831), and the guide sleeves (832) are slidably arranged along the guide posts (831); The guide plate (833) is arranged between the guide sleeves (832), and the guide plate (833) is arranged to move synchronously with the guide sleeves (832). A guide groove (834) is provided on the guide plate (833) along its length direction. Both ends of the rotary plate (84) are inserted into the guide grooves (834), and the rotary plate (84) is arranged to move along the guide grooves (834). Two groups of bag-smoothing modules (9) are symmetrically arranged at the two ends of the guide plate (833), and the bag-smoothing modules (9) are located between the two groups of guide plates (833). As the guide plate (833) descends, the bag-smoothing modules (9) come into contact with the upper film of the inner bag (10) to smooth the corresponding inner bag (10); The bag-smoothing module (9) includes a bag-smoothing roller (91), a limiting arm (92), a limiting pin (93), a swing arm (94) and an elastic stretching member (95). The two ends of the bag-smoothing roller (91) are rotatably mounted on the corresponding guide plate (833). The portion where the bag-smoothing roller (91) contacts the inner bag (10) can be freely rotated. The limiting arm (92) is mounted on the two ends of the rotating shaft of the bag-smoothing roller (91). The limiting arm (92) contacts the limiting pin (93) provided on the guide plate (833) to limit the swing angle of the bag-smoothing roller (91); the swing arm (94) is provided at both ends of the rotating shaft of the bag-smoothing roller (91); the swing arm (94) is located outside the limiting arm (92); and the elastic stretching member (95) is elastically connected between the swing arm (94) and the guide plate (833).

2. The continuous production and processing system for cushioning airbag inner bags according to claim 1, characterized in that: The hot pressing unit (61) comprises a hot pressing strip (611), an electric heating wire (612), an elastic contact head (613) and a limiting nut (614); The heat press strip (611) is arranged in a square shape, and a through-hole type mounting hole (615) is provided on the upper side of the heat press strip (611) along its length direction. The electric heating wire (612) is passed through the mounting hole (615). Both ends of the heat press strip (611) and the electric heating wire (612) are provided with threaded portions (616), and both ends of the electric heating wire (612) are recessed inwardly and provided with insertion holes (617); The elastic contact head (613) is symmetrically mounted at both ends of the thermal pressure strip (611), and a spring member (618) is provided between the elastic contact head (613) and the electric heating wire (612), and the elastic contact head (613) is elastically adjusted by the spring member (618). When the elastic contact head (613) is pressed and pushed by the positive contact unit (62) and the negative contact unit (63), the elastic contact head (613) is inserted into the corresponding socket (617), and current flows through the electric heating wire (612); The limiting nut (614) is covered on the elastic contact head (613), and the limiting nut (614) is threadedly matched with the threaded portion (616) to limit the elastic contact head (613) and the spring member (618).

3. The continuous production and processing system for cushioning airbag inner bags according to claim 2, characterized in that: The end of the elastic contact head (613) that contacts and squeezes the positive electrode contact unit (62) and the negative electrode contact unit (63) is a freely rotatable ball head (619).

4. The continuous production and processing system for cushioning airbag inner bags according to claim 3, characterized in that: The positive electrode contact unit (62) and the negative electrode contact unit (63) both include a wire (621), a conductive bar (622) and an insulating rib (623); The conductor (621) is a live wire or a neutral wire, and the conductor (621) is connected to the corresponding conductive strip (622); The conductive strip (622) is fixedly mounted on the mounting plate (100). The conductive strip (622) is made of a conductive material, and a groove (624) is provided on the conductive strip (622) along its length. The groove (624) is provided in a rolling engagement with the ball head (619). The insulating ribs (623) are arranged at the upper and lower ends of the conductive strip (622).

5. The continuous production and processing system for cushioning airbag inner bags according to claim 2, characterized in that: The chain unit (82) includes a sprocket (821) and a chain (822). The sprocket (821) is provided with four groups. The sprockets (821) are arranged in a square. The chain (822) is wound around the sprocket (821). Any link on the chain (822) is connected to the rotary plate (84). The chain (822) includes a working section (8221) and a rotary section (8222). The working section (8221) is arranged parallel to the conveying direction of the inner bag (10), and the working section (8221) is located at the bottom of the chain (822). The rotary section (8222) is connected to the end of the working section (8221).

6. The continuous production and processing system for cushioning airbag inner bags according to claim 1, characterized in that: The path length S1 of the rotary plate (84) driven by the chain unit (82) to rotate one circle and the length S2 of a single inner bag (10) satisfy the relationship: S1=S2.

7. The continuous production and processing system for cushioning airbag inner bags according to claim 5, characterized in that: A lifting module (85) is installed on the rotary plate (84) to drive the hot pressing unit (61) and the cutter (71) to move up and down. The lifting module (85) includes a lifting element (851) and a lifting plate (852). The lifting element (851) is installed on the rotary plate (84), and the lifting element (851) is pushed downward; The lifting plate (852) is installed at the pushing end of the lifting element (851), and the hot pressing unit (61) and the cutter (71) are installed on the lower end surface of the lifting plate (852).

8. The continuous production and processing system for cushioning airbag inner bags according to claim 7, characterized in that: A visual identifier (200) is installed on the top of the mounting plate (100), and the visual identifier (200) identifies the valve (101) on the inner bag (10) transported below, and transmits a signal to the lifting module (85), thereby controlling the lifting module (85) to drive the hot pressing unit (61) and the cutter (71) to descend and contact the inner bag (10); A photoelectric sensor (300) is installed at the lower part of the mounting plate (100), and the photoelectric sensor (300) is located at the tail end of the working section (8221). The photoelectric sensor (300) senses the lifting module (85) and transmits a signal to the lifting module (85), thereby controlling the lifting module (85) to drive the hot pressing unit (61) and the cutter (71) to lift. A wedge-shaped guide platform (853) is provided at the lifting and lowering positions of the lifting module (85), and the slope surface of the guide platform (853) contacts and guides the end of the elastic contact head (613).

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