Film bag hole pricking mechanism for continuous film feeding

Abstract

The utility model discloses a film bag hole pricking mechanism for continuous film feeding, which belongs to the technical field of packaging and comprises a guide block and a film pricking wheel which are oppositely arranged on two end faces of a rolled film, and a film pricking knife is rotatably arranged on the film pricking wheel. The coiled film is continuously conveyed to drive the film pricking cutter to rotate, and meanwhile holes are continuously pricked in the surface of the coiled film. The continuous punching device has the advantages of being simple in structure, low in material cost and the like, extra power does not need to be provided, continuous punching can be achieved only by following with a rolled film, and control resources are saved.

Description

Technical Field

[0001] The utility model relates to a film bag punching structure, in particular to a film bag punching mechanism for continuous film running. Background Art

[0002] PE film bag making is widely used in the food packaging industry due to the low cost of PE film materials, and is usually used for large bags covering small bags or various frozen foods. Since it is generally necessary to pack the products after packaging, there are high requirements for exhausting the products after packaging. At present, for the PE film punching and exhausting mechanism in the market, due to the unique stretching and ductility of the PE film, the conventional punching mechanism will cause stretching and drawing phenomena in the punching of the film in production, resulting in situations such as inability to cut through and generation of burrs, and cannot meet the packaging appearance requirements of customers.

[0003] In the prior art, the patent CN212554233U discloses a film blowing machine punching mechanism and a film blowing machine with punching, belonging to the technical field of film blowing machines. The film blowing machine punching mechanism includes a mounting frame, a feeding support roller, a discharging support roller, a punching roller, a feeding guide roller and a discharging guide roller. The film blowing machine with punching includes a film blowing machine body and the above-mentioned film blowing machine punching mechanism provided on the film blowing machine body. This patent provides a punching mechanism for films. However, this punching structure is provided with a punching roller. Due to the relatively large volume of the punching structure in the form of a roller, additional power must be provided to make it rotate in order to better achieve punching. And for some films with relatively large elasticity, such as PE films, using this punching structure cannot guarantee the punching quality. Summary of the Utility Model

[0004] The utility model aims to solve the above problems existing in the punching mechanism in the prior art, and proposes a film bag punching mechanism for continuous film running, which can punch and exhaust the continuous film pulling structure.

[0005] In order to achieve the above utility model purpose, the technical solution of the utility model is as follows:

[0006] A film bag punching mechanism for continuous film running, characterized in that it includes guiding blocks and film punching wheels oppositely arranged on two end faces of a rolled film, and film punching knives are rotatably arranged on the film punching wheels; while the rolled film is continuously conveyed to drive the film punching knives to rotate, continuous punching is performed on the surface of the rolled film.

[0007] Specifically, in a certain embodiment, the punching mechanism further includes two fixed shafts arranged parallel to the width direction of the rolled film, the film punching wheel is connected to one of the fixed shafts, and the guiding block is connected to the other fixed shaft.

[0008] Specifically, in a certain embodiment, both ends of the fixed shaft are detachably and fixedly connected to the machine frame.

[0009] Specifically, in one embodiment, the film - punching wheel includes a fixedly - arranged housing, the film - punching knife is located inside the housing, and a notch allowing the film - punching knife to expose is formed on the housing.

[0010] Specifically, in one embodiment, the end face of the guiding block is opposite to and parallel to the end face where the notch on the housing is located.

[0011] Specifically, in one embodiment, a gap exactly allowing the rolled film to pass through is left between the end face of the guiding block and the end face where the notch on the housing is located.

[0012] Specifically, in one embodiment, the film - punching knife is a spiky - shaped structure evenly distributed at circumferential intervals on a disc, and the center of the disc where the film - punching knife is located is rotationally connected to the fixed shaft through a bearing.

[0013] Specifically, in one embodiment, a groove is formed on the guiding block along the rotation direction of the film - punching knife, and the rotating film - punching knife can pass through the groove without interference.

[0014] Specifically, in one embodiment, at least one set of corresponding film - punching wheels and guiding blocks are arranged on two fixed shafts, and both the film - punching wheels and the guiding blocks are slidably connected to the fixed shafts through sliding adjusting members.

[0015] Specifically, in one embodiment, the sliding adjusting member is coaxially connected to the fixed shaft, and a corresponding locking member is provided to fix the positions and directions of the connected film - punching wheel and guiding block.

[0016] The working principle of the present invention is as follows:

[0017] The servo film - feeding mechanism includes a rolled film wound on a reel. The rotation of the reel continuously outputs the rolled film. The film - guiding mechanism is used to make the rolled film output by the servo film - feeding mechanism in a tensioned state through setting. The servo film - pulling mechanism is used to provide power for the conveyance of the rolled film. Under the traction of the servo film - pulling motor, the rolled film coming out of the servo film - feeding mechanism is in an active state. During the process of the rolled film being conveyed along the roller, the power generated by its continuous conveyance drives the film - punching knife in the punching mechanism to rotate synchronously, continuously making intermittent punch holes on the rolled film to achieve the continuous punching effect on the film bag.

[0018] In summary, the present utility model has the following advantages:

[0019] 1. By setting the guiding block and the film - punching wheel, the punching mechanism of the present utility model enables the rolled film to pass between them. The power generated by the continuous conveyance of the rolled film can drive the film - punching knife to rotate and continuously punch holes on the surface of the rolled film. It has the advantages of simple structure, low material cost, etc. And there is no need to provide additional power, and continuous punching can be achieved only by following the rolled film, saving control resources;

[0020] 2. In the present utility model, the film-tying wheel and the guiding block cooperate to leave a space that only allows the film roll to pass through. The two opposite end faces of the two can restrict the periphery of the film-tying position of the film roll, preventing it from deforming greatly and thus affecting the film-tying effect, and improving the film-tying quality.

[0021] 3. In the present utility model, a plurality of corresponding guiding blocks and film-tying wheels can be arranged through the fixed shaft, and the axial and circumferential positions of the guiding blocks and film-tying wheels on the fixed shaft can be adjusted, improving the applicability of the film-tying mechanism. Description of the Drawings

[0022] Figure 1 is a schematic diagram of the overall structure of the film-tying mechanism;

[0023] Figure 2 is a front view of the film-tying mechanism;

[0024] Figure 3 is Figure 2 a view from direction A of

[0025] Figure 4 is Figure 1 an enlarged schematic diagram of structure I in

[0026] Figure 5 is a schematic diagram of the film roll conveying path in the present utility model;

[0027] Figure 6 is a front schematic diagram of the installation of the film-tying mechanism;

[0028] Figure 7 is a rear schematic diagram of the installation of the film-tying mechanism;

[0029] In the figure:

[0030] 1. Servo film-releasing mechanism, 2. Film-tying mechanism, 3. Coding machine, 4. Film-running mechanism, 5. Shaper, 6. Longitudinal sealing mechanism, 7. Servo film-pulling mechanism, 8. Film roll, 201. Film-tying wheel, 202. Film-tying knife, 203. Fixed shaft, 204. Groove, 205. Housing, 206. Guiding block, 207. Sliding adjustment part, 208. Disc, 209. Locking part. Detailed Embodiments

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated herein can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without creative efforts belong to the scope of protection of the present utility model.

[0033] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0034] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "vertical", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. 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 thus should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present utility model, it should also be noted that unless otherwise clearly defined and limited, the terms "set", "installed", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0036] Embodiment 1

[0037] This embodiment provides a film bag punching mechanism for continuous film running. The punching mechanism 2 is arranged on the path of the conveying of the winding film 8 and is used to continuously rotate under the drive of the conveying power of the winding film 8 and continuously punch the surface of the winding film 8.

[0038] As Figures 1 to 3 shown, the punching mechanism 2 includes a film punching wheel 201 and a guide block 206 oppositely arranged on two end faces of the winding film 8. A film punching knife 202 is rotatably arranged on the film punching wheel 201, and the continuously conveyed winding film 8 passes between the film punching wheel 201 and the guide block 206.

[0039] To better install the hole-punching mechanism, two fixed shafts 203 are arranged parallel to the width direction of the winding film 8. A film-tying wheel 201 is connected to one of the fixed shafts 203, and a guiding block 206 is connected to the other fixed shaft 203.

[0040] In this embodiment, as Figure 4 shown, the film-tying wheel 201 includes a fixedly arranged housing 205. The film-tying knife 202 is arranged inside the housing 205. A notch allowing the film-tying knife 202 to expose is formed on the housing 205. The end face of the guiding block 206 faces the end face where the notch is located, and the two end faces are parallel.

[0041] Preferably, to improve the hole-punching effect of the film-tying knife, only a gap allowing the winding film 8 to pass through is left between the end face of the guiding block 206 and the end face where the notch on the housing 205 is located. A groove 204 is formed on the guiding block 206 along the rotation direction of the film-tying knife 202. The groove 204 allows the rotating film-tying knife 202 to rotate through without interference.

[0042] In this embodiment, the film-tying knife 202 is a spiky structure evenly distributed at intervals in the circumferential direction of a disc 208. The center of the disc 208 where the film-tying knife 202 is located is rotationally connected to the fixed shaft 203 through a bearing.

[0043] Through the design of the above-mentioned hole-punching mechanism 2, continuous hole-punching and air exhausting can be performed on the continuously moving film bag. Since the film-tying wheel 201 and the guiding block 206 cooperate to leave only a space allowing the winding film 8 to pass through, the two opposite end faces can play a limiting role around the hole-punching position of the winding film 8, preventing it from deforming greatly and affecting the hole-punching effect of the winding film. It is especially suitable for hole-punching of PE films with large elasticity and is beneficial to improving the hole-punching quality. Moreover, the film-tying knife 202 in the present utility model is light in weight and is relatively easy to rotate along with the conveying direction of the winding film 8 driven by the bearing. Therefore, continuous punching can be achieved without setting up an additional power mechanism for driving, saving the control cost.

[0044] Embodiment 2

[0045] As a preferred embodiment of the present utility model, this embodiment provides a hole-punching mechanism for a continuously moving film bag. The hole-punching mechanism 2 is arranged on the conveying path of the winding film 8 and is used for continuously rotating under the drive of the conveying power of the winding film 8 and continuously punching the surface of the winding film 8.

[0046] As Figures 1 to 3 shown, the hole-punching mechanism 2 includes a film-tying wheel 201 and a guiding block 206 oppositely arranged on two end faces of the winding film 8. A film-tying knife 202 is rotatably arranged on the film-tying wheel 201, and the continuously conveyed winding film 8 passes between the film-tying wheel 201 and the guiding block 206.

[0047] In order to better install the hole-punching mechanism, two fixed shafts 203 are arranged parallel to the width direction of the winding film 8. A film-punching wheel 201 is connected to one of the fixed shafts 203, and a guiding block 206 is connected to the other fixed shaft 203.

[0048] In this embodiment, as Figure 4 shown, the film-punching wheel 201 includes a fixedly arranged housing 205. The film-punching knife 202 is arranged inside the housing 205. A notch allowing the film-punching knife 202 to expose is formed on the housing 205. The end face of the guiding block 206 is opposite to the end face where the notch is located, and the two end faces are parallel.

[0049] Preferably, in order to improve the hole-punching effect of the film-punching knife, only a gap allowing the winding film 8 to pass through is left between the end face of the guiding block 206 and the end face where the notch on the housing 205 is located. A groove 204 is formed on the guiding block 206 along the rotation direction of the film-punching knife 202. The groove 204 allows the rotating film-punching knife 202 to rotate through without interference.

[0050] In this embodiment, the film-punching knife 202 is a spiky structure evenly distributed at circumferential intervals on a disc 208. The center of the disc 208 where the film-punching knife 202 is located is rotationally connected to the fixed shaft 203 through a bearing.

[0051] Furthermore, in this embodiment, multiple groups of the film-punching wheel 201 and the guiding block 206 can be correspondingly arranged on the two fixed shafts 203. Moreover, the film-punching wheel 201 is slidably connected to one of the fixed shafts 203, and the guiding block 206 is slidably connected to the other fixed shaft 203. The fixed shaft 203 is detachably and fixedly connected to the machine frame, facilitating the installation and disassembly of the hole-punching mechanism 2.

[0052] Preferably, in this embodiment, both the film-punching wheel 201 and the guiding block 206 are axially slid along the fixed shaft 203 and circumferentially angularly adjusted through a sliding adjustment member 207. As Figure 4 shown, the sliding adjustment member 207 is coaxially connected to the fixed shaft 203, and a corresponding locking member 209 is provided to fix the positions and directions of the connected film-punching wheel 201 and the guiding block 206.

[0053] Through the arrangement of the above-mentioned sliding adjustment member 207 and the locking member 209, the distance between the hole-punching mechanisms can be adjusted as needed to facilitate the adjustment of the hole-punching positions.

[0054] Embodiment 3

[0055] The present utility model provides a film bag hole-punching mechanism for continuous film running. On the basis of Embodiment 1 or Embodiment 2, the hole-punching mechanism 2 is used in cooperation with the servo film feeding mechanism 1, the film running mechanism 4, and the servo film pulling mechanism 7, as Figures 5 to 7 shown.

[0056] As shown Figure 5 in the figure, the servo film feeding mechanism 1 includes a coiled film 8 arranged on a reel. The rotation of the reel continuously outputs the film 8. The film feeding mechanism 4 is used to keep the film 8 output by the servo film feeding mechanism 1 in a tensioned state for conveying by setting a tolerance. The servo film pulling mechanism 7 is used to provide power for the conveying of the film 8.

[0057] A number of rollers parallel to the axial direction of the reel are arranged on the path where the film 8 is conveyed from the servo film feeding mechanism 1 to the film feeding mechanism 4. These rollers are used to wind and traction the film 8.

[0058] Figure 5 The conveying path of the film 8 is shown: under the traction of the servo film pulling motor, the film 8 coming out of the servo film feeding mechanism 1 is in an active state. During the process of the film 8 being conveyed along the roller, the generated conveying power makes the film punching knife 202 in the hole punching mechanism 2 follow the film 8, and continuously punch holes on the film 8 to achieve the exhaust effect; the servo film pulling mechanism 7 pulls a fixed length value according to the required bag length. The film 8 after punching passes through the former 5 and then reaches the longitudinal sealing mechanism 6 for bag making and forming.

[0059] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Any simple modification or equivalent change made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A film bag piercing mechanism for continuous film feeding, characterized in that: The invention comprises guide blocks (206) and a film-binding wheel (201) which are arranged relatively on two end surfaces of a film roll (8); a film-binding knife (202) is rotatably arranged on the film-binding wheel (201); the film roll (8) is continuously conveyed to drive the film-binding knife (202) to rotate, thereby continuously punching holes on the surface of the film roll (8).

2. A film bag piercing mechanism for continuous film feeding according to claim 1, characterized in that: The punching mechanism (2) further comprises two fixed shafts (203) arranged parallel to the width direction of the rolled film (8); the film punching wheel (201) is connected to one of the fixed shafts (203), and the guide block (206) is connected to the other fixed shaft (203).

3. A film bag piercing mechanism for continuous film feeding according to claim 2, characterized in that: Both ends of the fixed shaft (203) are detachably fixedly connected to the frame.

4. The film bag piercing mechanism for continuous film feeding according to claim 1, characterized in that: The film-binding wheel (201) comprises a fixedly arranged shell (205), the film-binding knife (202) is located inside the shell, and a notch is provided on the shell (205) to allow the film-binding knife (202) to be exposed.

5. The film bag piercing mechanism for continuous film feeding according to claim 4, characterized in that: The end surface of the guide block (206) is opposite to the end surface of the housing (205) where the notch is located and is parallel to each other.

6. A film bag piercing mechanism for continuous film feeding according to claim 5, characterized in that: A gap is left between the end surface of the guide block (206) and the end surface of the housing (205) where the notch is located, which is just enough to allow the film roll (8) to pass through.

7. The film bag piercing mechanism for continuous film feeding according to claim 2, characterized in that: The film-sticking knife (202) is a spike-like structure evenly distributed at intervals in the circumferential direction of a circular disk (208), and the center of the circular disk (208) where the film-sticking knife (202) is located is rotatably connected to the fixed shaft (203) via a bearing.

8. A film bag piercing mechanism for continuous film feeding according to claim 1 or 6, characterized in that: The guide block (206) is provided with a groove (204) along the rotation direction of the film-forming knife (202), and the groove (204) allows the rotating film-forming knife (202) to pass through without causing interference.

9. The film bag piercing mechanism for continuous film feeding according to claim 2, characterized in that: At least one set of corresponding film-binding wheels (201) and guide blocks (206) are arranged on the two fixed shafts (203); the film-binding wheels (201) and guide blocks (206) are both slidably connected to the fixed shafts (203) via sliding adjustment members (207).

10. A film bag piercing mechanism for continuous film feeding according to claim 9, characterized in that: The sliding adjustment member (207) is coaxially connected to the fixed shaft (203), and is provided with a corresponding locking member (209) for fixing the position and direction of the film-binding wheel (201) and the guide block (206) connected thereto.

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