Bag making assembly and bag making machine

Abstract

The utility model provides a bag making assembly. The bag making assembly comprises an auxiliary film drawing mechanism, a tension adjusting mechanism and a main film drawing mechanism which are arranged in the moving direction of a film material. The main film drawing mechanism and the auxiliary film drawing mechanism are each provided with a driving roller and an extrusion roller. A driving roller and an extrusion roller of the auxiliary film drawing mechanism are staggered in the vertical direction; the tension adjusting mechanism is provided with a fixed roller and a floating roller, and the floating roller can rotate around the fixed roller. Through the cooperation of the auxiliary film drawing mechanism, the main film drawing mechanism and the tension adjusting mechanism, in the film material conveying process, the tension is not prone to excessively changing suddenly, and the tensioning state of the film material is met when bag making machining is carried out. The upper heat sealing die and the lower heat sealing die are arranged to be of a rectangular tooth-shaped structure, a cooling device is arranged, and the tensile capacity of the heat sealing face position is effectively improved. The utility model further provides a bag making machine comprising the bag making assembly.

Description

Technical Field

[0001] The utility model belongs to the field of plastic bag making equipment, and particularly relates to a bag making component and a bag making machine. Background Art

[0002] Plastic seal bags have been widely used in the packaging of daily chemical products, beverages, foods, pet feeds and other fields in recent years due to their good sealing performance, convenient transportation and economy.

[0003] With the continuous increase of application fields, the corresponding process requirements for plastic seal bags have gradually increased, resulting in the extension of the production line of plastic seals and causing many production problems. Due to the increase in the processes of plastic seal bags, the number of heat-sealing areas has increased. After multiple heat-sealings of the plastic film material, the material of the heat-sealing area becomes soft. Coupled with the extension of the production line, the instantaneous stress on the plastic film material during transportation increases. Under the combined action of the two, local deformation and other situations of the plastic film material are likely to occur in the heat-sealing area during the production line transportation. At present, the speed of multiple film pulling mechanisms on the production line is controlled to make the film tension tend to 0. However, with the extension of the production line, affected by factors such as system delay and relative sliding of the film material, the control effect of this method gradually decreases, and local sagging of the film material is likely to occur, resulting in an increase in the dislocation between the film materials and the decrease in the welding position accuracy, ultimately affecting the finished product quality of plastic seal bags. Summary of the Invention

[0004] To solve the deficiencies of the existing technology, the utility model provides a bag making component, including an auxiliary film pulling mechanism, a tension adjusting mechanism and a main film pulling mechanism arranged along the moving direction of the film material. Through the adjusted transmission of the auxiliary film pulling mechanism and the main film pulling mechanism, the tension during the transportation of the film material is reduced. The tension adjusting mechanism makes the film material moderately "tight" during the processes such as heat-sealing of the film material to meet the processing conditions of the bag making process. A heat-sealing device and a cooling device are arranged between the main film pulling mechanism and the tension adjusting mechanism, and a rectangular tooth-shaped structure is arranged on the upper heat-sealing die and the lower heat-sealing die, so that the heat-sealing area is dispersed and deformation and other situations are not likely to occur when being pulled. The utility model also provides a bag making machine including the bag making component.

[0005] The technical effects to be achieved by the utility model are realized through the following technical aspects:

[0006] In the first aspect, the utility model provides a bag making component, including an auxiliary film pulling mechanism, a tension adjusting mechanism and a main film pulling mechanism arranged along the moving direction of the film material;

[0007] Both the main film pulling mechanism and the auxiliary film pulling mechanism are provided with a driving roller and a pressing roller; the driving roller and the pressing roller of the auxiliary film pulling mechanism are arranged with a vertical offset;

[0008] The tension adjustment mechanism is provided with a fixed roller and a floating roller, and the floating roller can rotate around the fixed roller.

[0009] In some embodiments, the auxiliary film pulling mechanism further includes an extrusion roller driving member, which is arranged on the auxiliary film pulling mechanism and drives the extrusion roller to approach or move away from the driving roller in the vertical direction.

[0010] In some embodiments, on one side of the tension adjustment mechanism parallel to the moving direction of the film material, a floating roller driving member for driving the floating roller to rotate is fixedly arranged. The floating roller driving member includes a fixed part and a driving part. The fixed part is rotatably arranged on the tension adjustment mechanism, and the driving part is drivingly connected to one end of the floating roller.

[0011] In some embodiments, a floating roller inductor is fixedly arranged on one side of the tension adjustment mechanism away from the floating roller driving member. The floating roller inductor is provided with an induction area, and one end of the floating roller away from the floating roller driving member falls into the induction area.

[0012] In some embodiments, the tension adjustment mechanism further includes a connecting member, which is connected to both ends of the fixed roller and the floating roller and makes the distance between the fixed roller and the floating roller relatively fixed.

[0013] In some embodiments, along the moving direction of the film material, a heat sealing device and a cooling device are arranged between the main film pulling mechanism and the tension adjustment mechanism; the heat sealing device includes an upper heat sealing die and a lower heat sealing die which are oppositely arranged in the vertical direction, and the upper heat sealing die and the lower heat sealing die can be opened or engaged with each other; the cooling device includes an upper cooling die and a lower cooling die which are oppositely arranged in the vertical direction, and the upper cooling die and the lower cooling die can be opened or engaged with each other.

[0014] In some embodiments, both the upper heat sealing die and the lower heat sealing die are of a rectangular tooth-like structure. When the upper heat sealing die and the lower heat sealing die engage with the film material, a bite line is formed. The rectangular tooth-like structures of the upper heat sealing die and the lower heat sealing die are symmetrically arranged along the bite line. At the bite line, the film material forms intermittent heat-sealed areas.

[0015] In some embodiments, at least two heat sealing devices are arranged, and the heat-sealed areas of different heat sealing devices overlap with each other to form a continuous heat-sealed surface; on the heat-sealed surface, local areas of different heat-sealed areas intersect.

[0016] In some embodiments, when the upper cooling die and the lower cooling die engage with the film material, a cooling area is formed, and the cooling area covers the heat-sealed surface.

[0017] In a second aspect, the utility model provides a bag making machine, comprising an exhaust clamp, a trimming knife and any of the above-mentioned bag making components;

[0018] In the direction of the film material movement, the exhaust clamp is arranged at the front end of the main film pulling mechanism and / or the auxiliary film pulling mechanism, the exhaust clamp is in the shape of an elongated strip, and is provided with a wedge-shaped opening in the direction of the film material movement, and the cross-sectional size of the wedge-shaped opening gradually decreases in the direction of the film material movement;

[0019] The trimming knife comprises a knife portion, and is fixed on the exhaust clamp in pairs. The knife portion is arranged obliquely downward on one side of the small end of the wedge-shaped opening.

[0020] In summary, the utility model has at least the following benefits:

[0021] 1. The bag-making assembly provided by the utility model, through the cooperation of the auxiliary film-pulling mechanism, the main film-pulling mechanism and the tension adjustment mechanism, is not prone to excessive sudden changes in the film material tension during the film material conveying process. In the process of heat sealing or other bag-making processes, the film material is in a "tensioned" state. In a long bag-making production line, the film material will not sag due to long-term "tensioning". There is no need to accurately control the tension of the film material, reducing the difficulty of control.

[0022] 2. The bag-making assembly provided by the utility model has an upper heat-sealing mold and a lower heat-sealing mold configured in a rectangular tooth-shaped structure. When the heat-sealing surface is large, some unsealed areas of the film material can withstand a certain tension after heat-sealing, so as to avoid the softened heat-sealing surface being unable to withstand the instantaneous tensile force and causing local deformation. The heat-sealing surface is then covered by the cooling area of the cooling device, and the heat-sealing surface is quickly cooled, effectively improving the tensile strength of the heat-sealing surface.

[0023] 3. The bag-making machine provided by the utility model, in addition to using the above-mentioned bag-making components, avoids the problem of film sagging and tensile deformation caused by too long production lines. It also adds an exhaust clamp to reduce the air intake bulging between the film materials during rapid transmission, which causes the film materials and accessories to be misaligned and offset, affecting the consistency of the finished plastic sealed bags. In addition, a pair of trimming knives are added above the exhaust clamps to cut off the wrinkles on both sides of the film materials after heat sealing in the direction of the film material movement, making the final product more beautiful. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the combination of membrane materials and accessories mentioned in Example 1 of the present utility model.

[0025] Figure 2 This is an axial side view of the bag making assembly of Example 1 of the utility model.

[0026] Figure 3 This is the auxiliary film-drawing mechanism of Example 1 of the utility model.

[0027] Figure 4 is Figure 3 the schematic A-A sectional view in

[0028] Figure 5 the axonometric view of one side with a floating roll driving part of the tension adjusting mechanism in Embodiment 1 of the present utility model.

[0029] Figure 6 the axonometric view of one side with a floating roll sensor of the tension adjusting mechanism in Embodiment 1 of the present utility model.

[0030] Figure 7 the axonometric view of the heat sealing device in Embodiment 1 of the present utility model.

[0031] Figure 8 is Figure 7 the view from direction B in

[0032] Figure 9 when the upper heat sealing die and the lower heat sealing die are engaged Figure 7 the view from direction B.

[0033] Figure 10 the view A of the heat sealing area of the heat sealing device in Embodiment 1 of the present utility model.

[0034] Figure 11 the schematic view of the film material heat sealing surface forming and cooling area in Embodiment 1 of the present utility model.

[0035] Figure 12 the axonometric view of the cooling device in Embodiment 1 of the present utility model.

[0036] Figure 13 the axonometric view of the bag making machine in Embodiment 2 of the present utility model.

[0037] Figure 14 the axonometric view of the exhaust clip and the trimming knife in Embodiment 2 of the present utility model.

[0038] Figure 15 is Figure 13 the schematic C-C sectional view in

[0039] Figure 16 the axonometric view of the trimming knife in Embodiment 2 of the present utility model.

[0040] Markings in the figure:

[0041] 100 - bag making assembly;

[0042] 200 - bag making machine;

[0043] 300 - sealed bag film material, 301 - film material, 302 - sealed bag fittings;

[0044] 400 - machine tool support;

[0045] 1 - Main film pulling mechanism, 11 - Driving roller, 12 - Extrusion roller;

[0046] 2 - Tension adjusting mechanism, 21 - Fixed roller, 22 - Floating roller, 23 - Floating roller driving member, 231 - Fixed part, 232 - Driving part, 24 - Floating roller inductor, 241 - Induction area, 25 - Connecting member, 26 - Side plate, 27 - Guide groove;

[0047] 3 - Auxiliary film pulling mechanism, 31 - Extrusion roller driving member;

[0048] 4 - Heat sealing device, 41 - Upper heat sealing die, 42 - Lower heat sealing die, 43 - Biting line, 44 - Heat sealing surface, 440 - Heat sealing area, 441 - Heat sealing area A, 442 Heat sealing area B;

[0049] 5 - Cooling device, 51 - Upper cooling die, 52 - Lower cooling die, 53 - Cooling area, 54 - Refrigerant inlet and outlet; 6 - Exhaust clip, 61 - Long strip clamping plate, 62 - Wedge-shaped opening;

[0050] 7 - Trimming knife, 71 - Knife part;

[0051] X - Film material moving direction. Detailed implementation mode

[0052] For the convenience of understanding the present utility model, the present utility model will be described more comprehensively below in conjunction with the accompanying drawings and specific embodiments. The preferred embodiments of the present utility model are given in the accompanying drawings. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present utility model more thorough and comprehensive.

[0053] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time.

[0054] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed during use. It is only for the convenience of describing the present utility model 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 cannot be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0055] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the description of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model.

[0056] Embodiment 1

[0057] The plastic seal bag is formed by sealing with a roll of film material 301 and seal bag fittings 302 as raw materials through processes such as heat sealing and ultrasonic pressing, and then completed through processes such as punching and finished product cutting.

[0058] As Figure 1 shown, adding seal bag fittings 302 between the upper and lower layers of film material 301 can complete the production combination of the currently commonly used plastic seal bag. For the convenience of description, we will collectively refer to it as seal bag film material 300 hereinafter. Among the seal bag fittings 302, commonly used ones such as bone seal zippers, easy tear bone strips, and suction nozzles are simultaneously pressed on the inner side of the film material 301 when the upper and lower layers of film material 301 are pressed together to achieve corresponding functions.

[0059] Please refer to Figure 2 , this embodiment provides a bag-making assembly 100, including an auxiliary film pulling mechanism 3, a tension adjusting mechanism 2, and a main film pulling mechanism 1 arranged along the film material moving direction X. On both the main film pulling mechanism 1 and the auxiliary film pulling mechanism 3, a driving roller 11 and a pressing roller 12 are provided. The seal bag film material 300 passes between the driving roller 11 and the pressing roller 12, and the pressing roller 12 moves towards the driving roller 11 and presses the seal bag film material 300, so that the seal bag film material 300 is clamped between the driving roller 11 and the pressing roller 12. The driving roller 11 is driven by an external power component, such as a power motor, a pneumatic motor, etc., to drive the seal bag film material 300 to move forward.

[0060] On the basis of Figure 2 , refer to Figures 3 - 4, which is different from the main film-drawing mechanism 1, the driving roller 11 and the squeezing roller 12 of the auxiliary film-drawing mechanism 3 are arranged in a vertically offset manner. When clamping the sealed bag film material 300, the auxiliary film-drawing mechanism 3 not only provides the power for the sealed bag film material 300 to move forward, but also provides the tension adjustment of the sealed bag film material 300 in the bag-making assembly 100. When the sealed bag film material 300 is conveyed too fast or too slow by the main film-drawing mechanism 1, the auxiliary film-drawing mechanism 3 can effectively adjust the position deviation and tension of the sealed bag film material 300 during conveyance through the squeezing roller 12 and the driving roller 11 arranged in a vertically offset manner, so that the sealed bag film material 300 is appropriately "relaxed" or "tightened", ensuring that the execution position of each process of the bag-making machine 200 is within the error range.

[0061] In the present embodiment, the auxiliary film-drawing mechanism 3 further includes an extrusion roller driving member 31. The extrusion roller driving member 31 is disposed on the auxiliary film-drawing mechanism 3, and drives the extrusion roller 12 to move closer to or away from the driving roller 11 in the vertical direction. In some embodiments, the extrusion roller driving member 31 may be a cylinder, an electric cylinder, or a hydraulic cylinder. In the present embodiment, the extrusion roller driving member 31 is an air cylinder, and the cylinder rod of the air cylinder is drivingly connected to the extrusion roller 12. The air cylinder can effectively absorb part of the energy when subjected to a sudden load, and effectively avoid the extrusion roller 12 or the driving roller 11 from absorbing energy and deforming due to an accident. When the bag-making assembly 100 is working, the air cylinder can control the position of the extrusion roller 12 according to the tension of the sealing bag film material 300, so as to reduce the problems of excessive tension of the sealing bag film material 300 and sagging of the sealing bag film material 300. In order to achieve precise control of the air cylinder, the air cylinder of the present embodiment is servo-controlled.

[0062] exist Figure 2 Based on Figures 5 - 6 The tension adjustment mechanism 2 is provided with a fixed roller 21 and a floating roller 22, and the floating roller 22 can rotate around the fixed roller 21. Among them, the fixed roller 21 is rotatably arranged on the tension adjustment mechanism 2, and specifically, the two ends of the fixed roller 21 are rotatably arranged on the side plates 26. The side plates 26 are the parts connecting the tension adjustment mechanism 2 and the machine tool support 400, and are arranged on both sides of the tension adjustment mechanism 2 parallel to the film moving direction X. The floating roller 22 is arranged in parallel with the fixed roller 21, and the floating roller 22 rotates and moves around the fixed roller 21. The sealing bag film material 300 passes between the fixed roller 21 and the floating roller 22, and the sealing bag film material 300 is pulled and "tensioned" by the rotation of the floating roller 22 around the fixed roller 21. When performing heat sealing, ultrasonic sewing processes, or cutting and punching processes, the sealing bag film material 300 needs to be appropriately "tensioned" to meet the processing requirements. If the "tension" is insufficient, it is easy to cause undesirable results such as wrinkling at the heat sealing position, loose sewing, and misalignment between the film materials 301.

[0063] In some embodiments, Figure 5As shown in the figure, on one side of the tension adjustment mechanism 2 parallel to the moving direction X of the film material, a floating roller driving member 23 for driving the rotation of the floating roller 22 is fixedly arranged. The floating roller driving member 23 includes a fixing part 231 and a driving part 232. The fixing part 231 is rotatably arranged on the tension adjustment mechanism 2, specifically on the side plate 26 of the tension adjustment mechanism 2. And the driving part 232 is drivingly connected to one end of the floating roller 22. In this embodiment, the floating roller driving member 23 is a cylinder, and the fixing part 231 is the cylinder body and the installation fitting part of the cylinder, and is rotatably arranged on the side plate 26 through the installation fitting at the tail of the cylinder. The driving part 232 is a cylinder rod, and the end of the cylinder rod is drivingly connected to one end of the floating roller 22 extending out of the side plate 26 through fittings such as a spherical eye joint. When the driving part 232 pushes the floating roller 22 upward, since the distance between the fixing part 231 and the fixed roller 21 is relatively fixed, the floating roller 22 moves relative to the fixed roller 21. Together with the guiding groove 27 arranged on the side plate 26, the floating roller 22 can be made to rotate around the fixed roller 21. In some other embodiments, the floating roller driving member 23 is selected as an electric cylinder, a hydraulic cylinder or a driver that can perform linear motion.

[0064] Furthermore, as Figure 6 shown in the figure, on the side of the tension adjustment mechanism 2 away from the floating roller driving member 23, a floating roller inductor 24 is fixedly arranged. The floating roller inductor 24 is provided with an induction area 241, and one end of the floating roller 22 away from the floating roller driving member 23 falls into the induction area 241. Similar to one end of the floating roller driving member 23, the end of the floating roller 22 falling into the induction area 241 also passes through the side plate 26, so as to be sensed by the floating roller inductor 24. By arranging the floating roller inductor 24 to detect the in-place situation of the floating roller 22 in real time, the execution result of the floating roller 22 driver can be better controlled, ensuring that the tension of the sealing bag film material 300 is appropriate. And the floating roller inductor 24 mentioned in this embodiment is a distance sensor.

[0065] Even further, in order to make the movement of the floating roller 22 easier to control, the tension adjustment mechanism 2 further includes a connecting member 25. The connecting member 25 is connected between the fixed roller 21 and the floating roller 22 and is arranged inside the two side plates 26, specifically fixed on the shaft rods at both ends, so that the distance between the fixed roller 21 and the floating roller 22 is relatively fixed. Thus, the floating roller 22 can rotate and move around the fixed roller 21 at a determined distance under the drive of the floating roller driving member 23, and the movement track of the floating roller 22 is easier to determine. In this embodiment, in order to enable the floating roller driving member 23 and the floating roller inductor 24 to work better, as Figure 6 shown in the figure, the guiding groove 27 on the side plate 26 is formed into an arc-shaped groove consistent with the tracks at both ends of the floating roller 22. The shaft rods at both ends of the floating roller 22 extend out of the guiding groove 27, one end is drivingly connected to the floating roller driving member 23, and the other end falls into the induction area 241.

[0066] Please, on the basis of Figure 2 , refer to Figure 7, in the moving direction X of the film material, a heat-sealing device 4 and a cooling device 5 are arranged between the main film-pulling mechanism 1 and the tension adjusting mechanism 2. The heat-sealing device 4 is an execution device for the heat-sealing process. By heat-sealing the film material 301 of the sealed bag film material 300, the edge of the sealed bag is formed. As Figures 8 - 9 shown, the heat-sealing device 4 includes an upper heat-sealing die 41 and a lower heat-sealing die 42, and the upper heat-sealing die 41 and the lower heat-sealing die 42 can be opened or engaged with each other. Similarly, the cooling device 5 also includes an upper cooling die 51 and a lower cooling die 52, and the upper cooling die 51 and the lower cooling die 52 can be opened or engaged with each other. The upper heat-sealing die 41 and the lower heat-sealing die 42 are heated by means such as resistance heating, and then opened and engaged, so that the heat-sealing process can be carried out on the sealed bag film material 300 to complete the forming of the sealed bag edge. The opening and engagement of the upper cooling die 51 and the lower cooling die 52 quickly cool the sealed bag edge of the sealed bag film material 300 that has completed the heat-sealing.

[0067] Furthermore, both the upper heat-sealing die 41 and the lower heat-sealing die 42 are of a rectangular tooth-like structure. When the upper heat-sealing die 41 and the lower heat-sealing die 42 engage the film material 301, an engagement line 43 is formed. The rectangular tooth-like structures of the upper heat-sealing die 41 and the lower heat-sealing die 42 are symmetrically arranged along the engagement line 43, and the film material 301 forms a discontinuous heat-sealing area 440 at the engagement line 43.

[0068] By arranging a rectangular tooth-like structure on the upper heat-sealing die 41 and the lower heat-sealing die 42, when the sealed bag film material 300 is heat-sealed, the sealed bag film material 300 forms a discontinuous heat-sealing area 440. Then, during the conveying process of the sealed bag film material 300, the heat-sealing area 440 has better tensile properties compared with the traditional continuous situation, effectively reducing the possibility of deformation of the heat-sealing area 440 due to large-area softening and tension.

[0069] In order to make the heat-sealing area 440 of the plastic sealed bag complete, furthermore, at least two heat-sealing devices 4 are provided, and the heat-sealing areas 440 of different heat-sealing devices 4 overlap each other to form a continuous heat-sealing surface 44. In this embodiment, two heat-sealing devices 4 are provided. In order to ensure the tensile strength of the heat-sealing surface 44, a cooling device 5 is arranged between two adjacent heat-sealing devices 4. When the sealed bag film material 300 completes one heat-sealing, the temperature of the heat-sealing area 440 is quickly reduced to the normal state through the cooling device 5, so that the tensile strength of the heat-sealing area 440 is restored. When the next heat-sealing process is carried out, it is ensured that the heat-sealing area 440 in the heat-sealing surface 44 is still a discontinuous softened heat-sealing area 440. As Figure 11As shown, two heat-sealing devices 4 respectively generate a heat-sealing area A 441 and a heat-sealing area B 442. A complete and continuous heat-sealing surface 44 is formed through the heat-sealing area A 441 and the heat-sealing area B 442, achieving the effect of sealing the edge of the sealed bag. In some other embodiments, there are three or more heat-sealing devices 4. According to the actual area of the heat-sealing surface 44, a cooling device 5 is arranged between the heat-sealing devices 4, or other cooling coolers are added. In this embodiment, each heat-sealing device 4 is paired with a cooling device 5 to meet the cooling requirements of the large-area heat-sealing surface 44. And multiple different heat-sealing areas 440 all overlap with each other to form a continuous heat-sealing surface 44, ensuring the integrity of the heat-sealing surface 44.

[0070] Refer to again Figure 11 , in some embodiments, local areas of different heat-sealing areas 440 on the heat-sealing surface 44 intersect. Through the intersection of the local areas of the heat-sealing areas 440, the effective sealing of the film material 301 on the heat-sealing surface 44 is ensured. The situation of leakage at the edges between the heat-sealing areas 440 caused by production errors is avoided. In this embodiment, there is an intersection area on the heat-sealing area A 441 and the heat-sealing area B 442, and the intersection area is less than or equal to one-third of their respective area ranges. While meeting the final sealing effect of the heat-sealing surface 44, the heat-sealing area is also reduced, reducing the energy consumption of the bag-making equipment.

[0071] Please refer to Figure 12 , the cooling device 5 has a similar shape to the heat-sealing device 4 and completes the cooling work of the sealed bag film material 300 by opening and closing. Please refer to Figures 11 - 12 , in some embodiments, the upper cooling die 51 and the lower cooling die 52 form a cooling area 53 when biting the film material 301, and the cooling area 53 covers the heat-sealing surface 44. By covering the heat-sealing surface 44 with the cooling area 53, it is ensured that the heat-sealing areas 440 on the heat-sealing surface 44 are all effectively covered and cooled. In this embodiment, the range of the cooling area 53 is larger than the heat-sealing surface 44, and after each heat-sealing process is completed, the cooling device 5 is required to complete the cooling work.

[0072] In addition, a refrigerant inlet and outlet 54 for heat exchange with an external cooling system is also provided on the cooling device 5. Constant-temperature refrigerant is introduced into the upper cooling die 51 and the lower cooling die 52, so that when the upper cooling die 51 and the lower cooling die 52 bite, the temperature of the cooling area 53 of the sealed bag film material 300 is controllable and the heat exchange efficiency is high, reducing the influence of the ambient temperature on the cooling effect of the heat-sealing surface 44.

[0073] In summary, for the bag-making component 100 provided in this embodiment, through the cooperation of the auxiliary film pulling mechanism 3, the main film pulling mechanism 1, and the tension adjustment mechanism 2, during the transportation of the film material 301, the tension of the film material 301 is not likely to have a large mutation. During the heat-sealing or other bag-making processes, the "tensioned" state required by the film material 301 can still be satisfied. In a relatively long bag-making production line, the film material 301 will not sag due to long-term "tensioning". There is also no need to precisely control the tension of the film material 301, reducing the control difficulty. For a production line that requires multiple heat-sealing processes, where the heat-sealing surface 44 has a large area and multiple regions, the upper heat-sealing die 41 and the lower heat-sealing die 42 are set as a rectangular tooth-like structure to divide the heat-sealing area, preventing the softened heat-sealing surface 44 from being unable to withstand the instantaneous tension and causing local deformation. Then, the cooling area 53 of the cooling device 5 covers the heat-sealing surface 44 to quickly cool the heat-sealing surface 44, further improving the tensile strength at the position of the heat-sealing surface 44.

[0074] On the bag-making production line using the above-mentioned bag-making component 100, when the sealed bag film material 300 is being transported, the film pulling mechanism does not need to precisely control the rotation speed either, so that when the film material 301 is "tensioned", the tension is in a state of 0. At the same time, the relative sliding between the system delay and the sealed bag film material 300 is also within the allowable range of the above-mentioned bag-making component 100. This ensures that the quality stability and consistency of the final plastic sealed bag products meet the standards.

[0075] Embodiment 2

[0076] This embodiment provides a bag-making machine 200, which includes an exhaust clamp 6, a trimming knife 7, and the bag-making component 100 described in Embodiment 1. In some embodiments, the bag-making machine 200 uses no less than one set of the bag-making components 100 in Embodiment 1 to meet the requirements of a longer bag-making production line. Refer to Figure 13 , in the bag-making machine 200 in this embodiment, only one set of the bag-making components 100 in Embodiment 1 and the exhaust clamp 6 and the trimming knife 7 are arranged as needed are described. Since the setting ideas of the other bag-making component 100 parts of the bag-making machine 200 are the same, they will not be elaborated here.

[0077] On the basis of Figure 13 , refer to Figures 14 - 15 , along the film material moving direction X, the exhaust clamp 6 is arranged at the front end of the main film pulling mechanism 1 and / or the auxiliary film pulling mechanism 3. The exhaust clamp 6 is in a long strip shape and has a wedge-shaped opening 62 in the film material moving direction X, and the cross-sectional dimension of the wedge-shaped opening 62 gradually decreases in the film material moving direction X. In this embodiment, to ensure that the air filled in the sealed bag film material 300 is within the allowable range during long-distance transportation, exhaust clamps 6 are arranged at the front ends of both the main film pulling mechanism 1 and the auxiliary film pulling mechanism 3. As Figures 14 - 15As shown in the figure, the exhaust clip 6 is composed of two upper and lower long strip clamping plates 61 fixed at both ends on the machine tool bracket 400 of the bag-making machine 200. In this embodiment, the fixing method is a combination of a screw and a nut. The screw is fixed to the machine tool bracket 400, and then the two ends of the upper and lower long strip clamping plates 61 are passed through the screw, and the height of the two ends is fixed and locked by the nut. Inside the long strip clamping plate 61, a wedge-shaped opening 62 is provided. When the sealed bag film material 300 passes through the wedge-shaped opening 62, the air between the film materials 301 is quickly discharged along both sides of the film material 301 or in the opposite direction to the movement of the film material 301, effectively controlling the misalignment between the film materials 301 and improving the quality consistency of the plastic sealed bag. In some other embodiments, the exhaust clip 6 can also be arranged before the heat-sealing device 4 to ensure that there is no excessive air in the sealed bag film material 300 before heat-sealing, which may affect the accuracy of the heat-sealing process.

[0078] After the sealed bag film material 300 is heated and cooled multiple times, wrinkles appear on both sides of the sealed bag film material 300 along the moving direction due to uneven heating, which affects the quality of the finished product. As Figures 13 - 16 shown in the figure, this embodiment is also provided with a trimming knife 7. A knife part 71 is provided on the trimming knife 7 and is fixedly arranged in pairs on the exhaust clip 6. The knife part 71 is inclined downward on one side of the small end of the wedge-shaped opening 62. In this embodiment, the paired trimming knives 7 are mirror-symmetrically arranged on the exhaust clip 6 at the front end of the main film-pulling mechanism 1. When the sealed bag film material 300 moves, the knife part 71 obliquely cuts the wrinkled edges on both sides of the sealed bag film material 300, ensuring that the edges are neat and beautiful when the final plastic sealed bag is cut.

[0079] In some embodiments, between the main film-pulling mechanism 1 and the tension adjustment mechanism 2 of the bag-making assembly 100, an ultrasonic welding device can also be provided to flatten the protrusions of the sealed bag fitting 302 at the heat-sealing surface 44, or a punching device can be provided to perform punching processing on a part of the sealed bag to complete the features of the plastic sealed bag such as hook holes and handle holes. Since there are various plastic sealed bag process devices, the specific use is determined according to the actual plastic sealed bag products and will not be described here.

[0080] In summary, by adding the exhaust clip 6 to the bag-making machine 200 equipped with the bag-making assembly 100, in a relatively long bag-making production line, the situation of air intake and bulging between the film materials 301 in the high-speed transported sealed bag film material 300 is reduced, and the misalignment and offset between the film materials 301 and the fittings are avoided, thus affecting the quality of the finished plastic sealed bag. By adding paired trimming knives 7 above the exhaust clip 6, the wrinkles on both sides of the film material 301 after heat-sealing are cut along the moving direction X of the film material, making the final finished product more beautiful.

[0081] The above content is only an example and explanation of the structure of the present utility model. Its description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these obvious replacement forms all fall within the protection scope of the present utility model.

Claims

1. A bag-making component, characterized in that, It includes an auxiliary film pulling mechanism (3), a tension adjusting mechanism (2), and a main film pulling mechanism (1) arranged along the film material moving direction (X); Both the main film pulling mechanism (1) and the auxiliary film pulling mechanism (3) are provided with a driving roller (11) and a squeezing roller (12); the driving roller (11) and the squeezing roller (12) of the auxiliary film pulling mechanism (3) are arranged with a vertical offset; The tension adjusting mechanism (2) is provided with a fixed roller (21) and a floating roller (22), and the floating roller (22) can rotate around the fixed roller (21).

2. The bag-making component according to claim 1, characterized in that, The auxiliary film pulling mechanism (3) further includes a squeezing roller driving member (31), and the squeezing roller driving member (31) is arranged on the auxiliary film pulling mechanism (3) and drives the squeezing roller (12) to approach or move away from the driving roller (11) in the vertical direction.

3. The bag-making assembly according to claim 1, characterized in that On one side of the tension adjusting mechanism (2) parallel to the film material moving direction (X), a floating roller driving member (23) for driving the floating roller (22) to rotate is fixedly arranged. The floating roller driving member (23) includes a fixed part (231) and a driving part (232). The fixed part (231) is rotatably arranged on the tension adjusting mechanism (2), and the driving part (232) is drivingly connected to one end of the floating roller (22).

4. The bag-making assembly according to claim 3, characterized in that On one side of the tension adjusting mechanism (2) away from the floating roller driving member (23), a floating roller inductor (24) is fixedly arranged. The floating roller inductor (24) is provided with an induction area (241), and one end of the floating roller (22) away from the floating roller driving member (23) falls into the induction area (241).

5. The bag-making assembly according to claim 4, wherein The tension adjusting mechanism (2) further includes a connecting member (25), and the connecting member (25) is connected to both ends of the fixed roller (21) and the floating roller (22) to relatively fix the distance between the fixed roller (21) and the floating roller (22).

6. The bag-making assembly according to claim 1, wherein, In the direction along the film material moving direction (X), a heat sealing device (4) and a cooling device (5) are arranged between the main film pulling mechanism (1) and the tension adjusting mechanism (2); the heat sealing device (4) includes an upper heat sealing die (41) and a lower heat sealing die (42) arranged oppositely in the vertical direction, and the upper heat sealing die (41) and the lower heat sealing die (42) can be opened or engaged with each other; the cooling device (5) includes an upper cooling die (51) and a lower cooling die (52) arranged oppositely in the vertical direction, and the upper cooling die (51) and the lower cooling die (52) can be opened or engaged with each other.

7. The bag-making assembly according to claim 6, wherein Both the upper heat sealing die (41) and the lower heat sealing die (42) are of a rectangular tooth-like structure. When the upper heat sealing die (41) and the lower heat sealing die (42) engage the film material (301), an engagement line (43) is formed. The rectangular tooth-like structures of the upper heat sealing die (41) and the lower heat sealing die (42) are symmetrically arranged along the engagement line (43). At the engagement line (43), the film material (301) forms intermittent heat-sealed areas (440).

8. The bag-making assembly according to claim 7, wherein, At least two of the heat-sealing devices (4) are provided, and the heat-sealing areas (440) of different heat-sealing devices (4) overlap with each other to form a continuous heat-sealing surface (44); on the heat-sealing surface (44), local areas of different heat-sealing areas (440) intersect.

9. The bag-making assembly according to claim 8, wherein, The upper cooling die (51) and the lower cooling die (52) form a cooling area (53) when clamping the film material (301), and the cooling area (53) covers the heat-sealing surface (44).

10. A bag making machine, characterized in that, It includes an exhaust clip (6), a trimming knife (7), and the bag-making assembly (100) according to any one of claims 1 to 9; In the film material moving direction (X), the exhaust clip (6) is arranged at the front end of the main film pulling mechanism (1) and / or the auxiliary film pulling mechanism (3). The exhaust clip (6) is strip-shaped and has a wedge-shaped opening (62) in the film material moving direction (X), and the cross-sectional dimension of the wedge-shaped opening (62) gradually decreases in the film material moving direction (X). The trimming knife (7) includes a knife part (71), and is fixedly arranged on the exhaust clip (6) in pairs. The knife part (71) is inclined downwardly on one side of the small end of the wedge-shaped opening (62).

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