CN112809810A

CN112809810A - Punching mechanism of film bag making machine

Info

Publication number: CN112809810A
Application number: CN202011471965.0A
Authority: CN
Inventors: 郑建
Original assignee: Taizhou Luqiao Hongya Plastic Packaging Factory
Current assignee: Taizhou Luqiao Hongya Plastic Packaging Factory
Priority date: 2020-12-14
Filing date: 2020-12-14
Publication date: 2021-05-18

Abstract

The invention relates to a punching mechanism of a film bag making machine, which comprises fixing frames, a punching plate and a puncher, wherein a cutter head abdicating hole is formed in the punching plate, the punching mechanism also comprises a sliding frame, the sliding frame and the punching plate are arranged between the two fixing frames, the sliding frame is positioned above the punching plate, a sliding locker is arranged on the sliding frame, the puncher is fixed on the sliding locker, the puncher comprises a punching cutter set and a driver for driving the punching cutter set to move and shear, the driver is fixed on the sliding locker, the punching cutter set is towards the cutter head abdicating hole, and a punching gap for a film to pass through is formed between the punching cutter set and the punching plate.

Description

Punching mechanism of film bag making machine

Technical Field

The invention relates to the technical field of film product manufacturing machinery, in particular to a punching mechanism of a film bag making machine.

Background

At present, in the packaging of electronic products, the most common plastic film bag is the plastic film bag, and the existing plastic film bag mainly comprises a bag body with an opening.

In the existing production process of plastic film bags, the most common is a bag making machine, the bag making machine is used for making a cylindrical plastic film raw material into a plastic film bag with a required size through heat sealing and shearing, and in order to avoid the problem of suffocation caused by wrong use of the plastic film bag, the plastic film bag is generally required to be perforated, and a Chinese patent with the publication number of CN209409467U discloses a perforating device of a bag making machine, which realizes perforation on the plastic film bag through the effect of a perforating cylinder and the extending end extending through the plastic film bag. Although this kind of mode of punching can punch the effect, but the in-process that strikes the punching causes the plastic film bag easily and produces tensile deformation or tear, its effect of punching is relatively poor, the yield that leads to the plastic film bag is lower, and perforating device is inconvenient to carry out the horizontal line and removes, chinese patent that application publication number is CN111086274A discloses a film bag machine, it has improved film tensile deformation and tearing problem, promote certain punching effect, but the subassembly that punches removes and switches still has the inconvenience, and the mounting groove is rectangular form, there is the crooked condition of small-amplitude along mounting groove length direction production in the fixed in-process of bolt, lead to the problem that the effect of punching descends.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the punching mechanism of the film bag making machine, which can improve the accurate and smooth switching of the punching knife set of the film bag making machine.

The above object of the present invention is achieved by the following technical solutions: the utility model provides a film bag machine mechanism of punching, includes mount, the board of punching, hole puncher, be equipped with the tool bit hole of stepping down on the board of punching, still include the balladeur train, the balladeur train all sets up between two mounts with the board of punching, the balladeur train is located the board of punching top, be equipped with the slip locking ware on the balladeur train, the hole puncher is fixed on the slip locking ware, the hole puncher is including the knife tackle that punches to and the drive knife tackle removes the driver of shearing, the driver is fixed on the slip locking ware, the knife tackle of punching moves the hole of stepping down towards the tool bit, be equipped with the clearance of punching that supplies the film to pass through between knife tackle and the.

Through adopting above-mentioned technical scheme, on the hole puncher was fixed in the slip locking ware completely, through the removal of slip locking ware on the balladeur train, just can effectual change hole puncher's position to can convenient regulation position of punching when the film area of the different specifications of processing, and the adjustment in-process punch the knife tackle whole and carry out the position change through the slip locking ware, thereby can effectually avoid punching the knife tackle to produce askew and influence the effect of punching.

The present invention in a preferred example may be further configured to: the balladeur train is two slide bars that are parallel to each other, the slip lock includes slider, locking screw, be equipped with two on the slider and supply slide bar male slide opening, locking screw threaded connection is on the slider and stretch into the slide opening and contradict with the slide bar.

Through adopting above-mentioned technical scheme, the effectual promotion of the slide bar of two parallels is to the support equilibrium of slider, and the slide bar is at the effectual guide effect that provides of gliding in-process of slider, promotes the stability and the smooth and easy degree of slider slip in-process to it is more convenient to make the slip locking device remove, after the slip locking device position is confirmed, through the conflict effect of locking screw and slide bar, makes the slider lock, the effectual hole puncher of having avoided the in-process produces gliding phenomenon.

The present invention in a preferred example may be further configured to: the punching device is characterized in that a mounting support is arranged on the sliding block, the puncher is mounted on the mounting support, a mounting through hole facing the punching plate is formed in the sliding block, the punching knife group is located in the mounting through hole, and the mounting through hole is located between the two sliding holes.

Through adopting above-mentioned technical scheme, the installing support has promoted the installation stability to the hole puncher, and the knife tackle that punches carries out the work of punching through the installation through-hole to the hole puncher sets up in the slider middle part, thereby guarantees that the focus of hole puncher is located the slider middle part, thereby effectual holistic stability that has promoted, has also guaranteed the stability of the during operation of punching.

The present invention in a preferred example may be further configured to: a plurality of slide locks are slidably coupled to the carriage.

Through adopting above-mentioned technical scheme, all there is the hole puncher on every slip locking ware to a plurality of hole puncher can carry out solitary position control that punches, and effectual needs of punching according to the reality adjust, thereby promote the suitability of punching.

The present invention in a preferred example may be further configured to: the cutter unit that punches includes the spliced pole, the pipe of cutting the hole, spacing head, spring, the pipe end of cutting the hole end is fixed in spliced pole one end, spacing head slides and cup joints on the spliced pole, the outer wall that the spliced pole is close to pipe one end of cutting the hole is equipped with first spacing protruding muscle, the inner wall that pipe one end was kept away from to the spacing head is equipped with the spacing protruding muscle of second of contradicting spacing with first spacing protruding muscle, the spliced pole is kept away from pipe of cutting one section and is equipped with the jump ring, the conflict of spring one end is on spacing overhead, and the other end is contradicted on the jump ring, the pipe of cutting the hole is located the spacing head completely when first spacing protruding muscle is contradicted with the spacing protruding muscle of.

By adopting the technical scheme, the spring pushes the limiting head to be positioned at the connecting column and away from the driver for one section, so that the hole cutting pipe is kept to be positioned inside the limiting head completely, the situation that the hole cutting pipe protrudes to scratch the passing film when the hole is not drilled is avoided, in the process of drilling, the limiting head preferentially collides with the punching plate, in the process of continuously pressing down the driver, the spring is extruded and deformed, so that the limiting head slides along the outer wall of the connecting column, the hole cutting pipe protrudes out of the limiting head to be contacted with the film, the hole cutting pipe pierces the film and is led into the cutter head yielding hole, the hole drilling on the film is realized, after the hole drilling is finished, the driver retracts, the hole cutting pipe also retracts to be separated from the film and simultaneously enter the inside of the limiting head, the driver continues to retract, the limiting head is continuously driven to be separated from the punching plate, so that the film can continuously move, and in the process, the limiting head is all contradicted with the punching plate, thereby ensuring that the film at the position where the limiting head is contradicted is kept fixed, is not influenced by external factors, keeps the state of tiling and abutting tightly, ensures more accuracy in the cutting process of the hole cutting pipe, and reduces the condition of tensile deformation or tearing of the film.

The present invention in a preferred example may be further configured to: the outer edge of one end, far away from the connecting column, of the hole cutting pipe is provided with a cutting blade, and the cutting blade faces in a wavy manner and is far away from one end of the connecting column.

Through adopting above-mentioned technical scheme, because the cutting edge is wavy to at first contradict with the film at the crest of the in-process cutting edge of cutting, at the in-process that continuously stretches into, the film cuts into the ring type along wavy blade gradually, thereby realizes the effect of punching, thereby avoids disposable contradicting to cause the small area of film to form the compression impact and produce tensile deformation or tear at the in-process that punches, thereby the effectual holistic effect of punching that has promoted.

The present invention in a preferred example may be further configured to: the cutting edge is slightly contracted towards the center far away from one end of the hole cutting pipe.

Through adopting above-mentioned technical scheme, at the in-process of punching the cutting, the effect that pushes down the cutting power and receive the slope setting produces the low-angle slope, and the cooperation film receives the extrusion to produce the micro-deformation in the twinkling of an eye, and the film face that is located the cutting sword produces the micro-deformation to the cutting power that makes the cutting sword can not keep perpendicular with the film face completely, thereby reduces the pushing down effect of cutting sword to the film, promotes the cutting action.

The present invention in a preferred example may be further configured to: and the connecting column is provided with a communicating through hole communicated with the hole cutting pipe.

Through adopting above-mentioned technical scheme, after the pipe cutting of cutting the hole punches, the waste material film is piled up in the pipe cutting the hole easily, when the waste material in the pipe cutting the hole piles up too much and influence normal punching, can disclose through the iron wire and go into UNICOM through-hole to in the pipe cutting the hole to the waste material film of being convenient for clears away.

The present invention in a preferred example may be further configured to: and a rubber gasket is fixed on the outer edge of the limiting head, which is far away from one section of the connecting column.

Through adopting above-mentioned technical scheme, the effectual effect that plays the buffering of rubber packing ring, and promote the conflict effect between spacing head and the film, avoid punching in-process film production to slide.

The present invention in a preferred example may be further configured to: the spliced pole is kept away from one section of cut hole pipe and is connected with the actuating lever threaded connection of driver, threaded connection has the lock nut of contradicting with the cut hole pipe on the actuating lever.

Through adopting above-mentioned technical scheme, it is convenient to connect through the mode of screw thread, and lock nut contradicts with the spliced pole, promotes the fixed effect of spliced pole and actuating lever.

In summary, the invention includes at least one of the following beneficial technical effects:

1. the puncher can stably move on the sliding frame through the sliding locking device, so that the position of the puncher is effectively changed, film strips with different specifications can be conveniently adjusted to be punched, and the punching effect is effectively prevented from being influenced by the fact that the punching knife group is inclined;

2. in the process of punching and returning the hole cutting pipe, the limiting heads are abutted against the punching plate, so that the film at the abutting positions of the limiting heads is kept fixed and is not influenced by external factors, and the flat and tight state is kept, so that the hole cutting pipe is more accurate in the cutting process, and the condition of tensile deformation or tearing of the film is reduced;

3. the crest of cutting edge at the in-process of cutting at first contradicts with the film, at the in-process that continuously stretches into, and the film cuts into the loop type along wavy blade gradually to realize the effect of punching, avoid once only contradict to cause the film small area to form the pressurized impact and produce tensile deformation or tear, thereby effectual holistic effect of punching of having promoted.

Drawings

FIG. 1 is a schematic perspective view of a punching mechanism of a film bag making machine.

FIG. 2 is a schematic view showing the punching state of the punching mechanism of the film bag making machine.

FIG. 3 is a cross-sectional view of a perforating mechanism of the film bag machine.

Fig. 4 is a sectional view showing a state where the stopper abuts against the film.

Fig. 5 is a sectional view of the punching blade set in a punching state.

Reference numerals: 1. a fixed mount; 2. punching a plate; 21. a cutter head abdicating hole; 3. a hole puncher; 31. a punching cutter set; 311. connecting columns; 312. cutting a hole pipe; 313. a cutting edge; 314. a limiting head; 315. a spring; 316. a clamp spring; 317. a first limit convex rib; 318. a second limit convex rib; 319. a rubber gasket; 32. a driver; 321. a drive rod; 33. mounting a bracket; 34. a locking nut; 35. a communication through hole; 4. a carriage; 5. a slide lock; 51. a slider; 52. a slide hole; 53. mounting a through hole; 54. a locking screw; 6. a film; 7. and (4) punching a hole gap.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The film bag making machine comprises a feeding mechanism, a heat sealing mechanism, a punching mechanism, a cutting mechanism and a discharging mechanism, wherein the feeding mechanism, the heat sealing mechanism, the cutting mechanism and the discharging mechanism are sequentially arranged on a rack, as shown in figure 1, a coiled double-layer plastic film 6 is rotationally arranged on the feeding mechanism, the plastic film 6 arrives at the heat sealing mechanism after passing out, the heat sealing mechanism presses down and abuts against a heat sealing line to the plastic film 6, the double-layer plastic film 6 is formed by heat sealing through the heat on the heat sealing line, the plastic film 6 is lifted by the heat sealing line and is continuously introduced for circulating heat sealing, so that the transverse heat sealing line is sequentially arranged along the length direction of the plastic film 6, the double-layer plastic film 6 after heat sealing is conveyed to the punching mechanism again, punching is performed on the double-layer plastic film 6 through the punching action of the punching mechanism, and is conveyed to the cutting mechanism after punching is completed, the double-layer plastic film 6 arrives at the discharging mechanism through, the blanking mechanism performs blanking so that the formed double-layer plastic film 6 is directly stacked on the discharging mechanism under the action of gravity.

Referring to fig. 1 and 2, a punching mechanism of a film bag making machine disclosed by the present invention comprises a fixed frame 1, a punching plate 2, a puncher 3 and a carriage 4, wherein the fixed frame 1 is used for fixing the whole punching mechanism of the film bag making machine on a frame of the film bag making machine, the carriage 4 is two parallel sliding rods, two ends of the sliding rods are respectively fixed on the fixed frame 1, two ends of the punching plate 2 are respectively fixed on the fixed frame 1, the sliding rods are located above the punching plate 2 and are parallel to the punching plate 2, wherein the sliding lock 5 comprises a sliding block 51 and a locking screw 54, the sliding block 51 is provided with two sliding holes 52 for the sliding rods to insert, so that the sliding rods are inserted into the sliding holes 52, the sliding block 51 can slide horizontally along the sliding rods through the matching of the sliding holes 52 and the sliding rods, the two parallel sliding rods effectively improve the supporting balance of the sliding block 51, and effectively provide a guiding function for the sliding rods in the sliding process, promote slider 51 stability and smooth and easy degree of slip in-process, thereby make the more convenient that slip locking ware 5 removed, slip locking ware 5 position is confirmed the back, through the conflict effect of locking screw 54 with the slide bar, make slider 51 lock, the effectual gliding phenomenon of puncher 3 punching in-process production of having avoided, wherein locking screw 54 threaded connection on slider 51 and stretch into slide opening 52 and slide bar conflict and can reach the locking action to slider 51, thereby can effectually lock behind slider 51 condition to suitable position, avoid punching in-process slider 51 to produce to remove and influence the effect of punching.

Referring to fig. 2 and 3, a cutter head abdicating hole 21 is formed in the punching plate 2, the cutter head abdicating hole 21 is in a long strip shape, and the length direction is the same as the length direction of the punching plate 2, the sliding block 51 is always kept right above the cutter head abdicating hole 21 during the moving process of the sliding block 51, the punching device 3 is fixed on the sliding locker 5, so as to ensure that the punching device 3 is always kept right above the cutter head abdicating hole 21 during the adjusting process, wherein the sliding block 51 is provided with a mounting bracket 33, the punching device 3 is mounted on the mounting bracket 33, wherein the punching device 3 comprises a punching cutter set 31 and a driver 32 for driving the punching cutter set 31 to move and shear, the driver 32 adopts an air cylinder, wherein the driver 32 is directly fixed on the sliding locker 5 through the mounting bracket 33, the mounting bracket 33 improves the mounting stability of the punching device 3, reduces the vibration influence of the driver 32 during the action, be equipped with the installation through-hole 53 towards punching plate 2 on slider 51, driver 32 installs behind installing support 33, punching knife tackle 31 stretches into the installation through-hole 53 that is located between two slide holes 52, punching knife tackle 31 is towards tool bit hole 21 of stepping down, be equipped with the clearance 7 that punches that supplies film 6 to pass through between punching knife tackle 31 and the punching plate 2, it makes film 6 let in clearance 7 to punch to need to punch, thereby punching knife tackle 31 punches work through installation through-hole 53, because puncher 3 sets up in slider 51 middle part, thereby guarantee that the focus of puncher 3 is located slider 51 middle part, thereby effectual holistic stability has been promoted, the stability of the during operation of punching has also been guaranteed.

Referring to fig. 2 and 3, four sliding lockers 5 are slidably connected to a carriage 4, each sliding locker 5 is provided with a puncher 3, each puncher 3 can punch a hole in one action process, four punches 3 can punch four holes simultaneously, a required number of sliding lockers 5 and punches 3 can be arranged on the carriage 4 according to actual needs in use, the unused sliding lockers 5 can be moved to the edge of the carriage 4 for standby, so that the plurality of punches 3 can carry out independent punching position adjustment, adjustment can be effectively carried out according to actual punching needs, punching adaptability is improved, the punches 3 are completely fixed on the sliding lockers 5, the positions of the punches 3 can be effectively changed by moving the sliding lockers 5 on the carriage 4, punching positions can be conveniently adjusted when films 6 strips with different specifications are processed, and the whole position change that carries out through sliding lock 5 of the knife tackle 31 that punches in the adjustment process to can effectually avoid punching knife tackle 31 to produce the skew and influence the effect of punching.

Referring to fig. 2 and 3, the perforating cutter set 31 includes a connection column 311, a hole cutting tube 312, a position limiting head 314, and a spring 315, wherein an annular fixing groove is fixed on an outer edge of one end of the position limiting head 314 away from the connection column 311, a rubber gasket 319 is filled in the fixing groove, the rubber gasket 319 is higher than the fixing groove, an end of the hole cutting tube 312 is fixed on one end of the connection column 311, the position limiting head 314 is slidably sleeved on the connection column 311, so that the position limiting head 314 can vertically move along the connection column 311, a first position limiting convex rib 317 is arranged on an outer wall of one end of the connection column 311 close to the hole cutting tube 312, a second position limiting convex rib 318 which is abutted against and limited by the first position limiting convex rib 317 is arranged on an inner wall of one end of the position limiting head 314 away from the hole cutting tube 312, in the process that the position limiting head 314 moves on the connection column 311, when the position limiting head 314 moves to the lowest end, thereby effectively limiting the limiting head 314 to continuously move, effectively avoiding the separation of the limiting head 314 and the connecting column 311, arranging a clamp spring 316 at one end of the connecting column 311 far away from the hole cutting pipe 312, abutting one end of a spring 315 on the limiting head 314, abutting the other end on the clamp spring 316, completely positioning the hole cutting pipe 312 in the limiting head 314 when the first limiting convex rib 317 abuts the second limiting convex rib 318, so that the spring 315 pushes the limiting head 314 to be positioned at one end of the connecting column 311 far away from the driver 32, thereby keeping the hole cutting pipe 312 completely positioned in the limiting head 314, thereby avoiding the film 6 which is protruded and scratched and passes through the hole cutting pipe 312 when no hole is drilled, connecting column 311 one end far away from the hole cutting pipe 312 is in threaded connection with the driving rod 321 of the driver 32, the driving rod 321 is in threaded connection with a locking nut 34 abutting the hole cutting pipe 312, the connection is convenient in a threaded manner, and the locking nut 34, the fixing effect of the connecting column 311 and the driving rod 321 is improved.

Refer to fig. 4, 5, in the punching process, driver 32 drives whole cutter unit 31 that punches and removes to punching plate 2, spacing head 314 is preferred to conflict with punching plate 2, rubber gasket 319 extrudes plastic film 6 on punching plate 2 completely this moment, the effectual effect that plays the buffering of in the in-process rubber gasket 319 of contradicting, and promote the conflict effect between spacing head 314 and the film 6, avoid punching in-process film 6 to produce and slide, driver 32 lasts the in-process that pushes down, spring 315 receives extrusion deformation, thereby spacing head 314 continues to slide along spliced pole 311 outer wall, make the protruding spacing head 314 of trompil pipe 312 and film 6 contact, thereby in the trompil pipe 312 pierces through film 6 and lets in the tool bit hole 21 of stepping down, thereby realized punching to film 6.

Referring to fig. 4, 5, punch the back and retract driver 32, make the trompil pipe 312 also retract and get into spacing head 314 inside when film 6 separates, driver 32 continues to retract, continue to drive spacing head 314 and the board 2 that punches and separate, thereby make film 6 can continue to move, thereby punch and the in-process that the trompil pipe 312 retreats, spacing head 314 all conflicts with the board 2 that punches, thereby guarantee that the film 6 of spacing head 314 conflict position keeps fixed, do not receive the influence of external factor, keep tiling to support tight state, make more accurate in the cutting process of trompil pipe 312, the tensile deformation of film 6 or the torn condition have been reduced.

Referring to fig. 4, 5, be equipped with the cutting edge 313 that is used for cutting plastic film 6 on the outer edge of spliced pole 311 one end is kept away from to cut hole pipe 312, cutting edge 313 is the wavy orientation and keeps away from spliced pole 311 one end, and cutting edge 313 keeps away from that one end of cut hole pipe 312 contracts to the center slightly, because cutting edge 313 is the wavy, thereby at the crest of the in-process cutting edge 313 of cutting at first contradict with film 6, thereby reduce directly to plastic film 6 cutting contact surface, promote the penetrating effect, effectual avoiding penetrates the effect and hangs or tear plastic film 6 that the low extrusion deformation volume that leads to of penetrating effect is great.

Referring to fig. 4 and 5, in the process that the cutting edge 313 continuously extends, the film 6 is gradually cut into a ring shape along the wavy cutting edge, so as to realize the punching function, effectively improve the overall punching effect and efficiency, in the process of punching and cutting, the downward pressing cutting force is acted by the inclined arrangement to generate small-angle inclination, and the film 6 surface outside the cutting edge 313 generates micro-deformation in cooperation with the micro-deformation generated at the moment when the film 6 is extruded, so that the cutting force of the cutting edge 313 can not be completely vertical to the surface of the film 6, thereby reducing the pressing action of the cutting edge 313 on the film 6 and improving the cutting action, and because the cutting edge 313 is wavy, the waste material of the cut film 6 is in a wafer shape, so that the film 6 waste outer edge has less contact surface with the inner side surface of the cutting edge 313, thereby facilitating the falling of the film 6 waste away from the cutting edge 313.

Referring to fig. 4 and 5, the connecting column 311 is provided with a communicating through hole 35 communicating with the hole cutting pipe 312, after the hole cutting pipe 312 is cut and punched, the waste film 6 is easily accumulated in the hole cutting pipe 312, when the waste in the hole cutting pipe 312 is accumulated too much and normal punching is influenced, the waste film 6 can be conveniently removed by poking the communicating through hole 35 to the hole cutting pipe 312 through an iron wire.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. The utility model provides a film bag machine mechanism of punching, includes mount (1), hole board (2), hole puncher (3), be equipped with tool bit hole of stepping down (21), characterized by on hole board (2): still include balladeur train (4), balladeur train (4) all set up between two mount (1) with perforated plate (2), balladeur train (4) are located perforated plate (2) top, be equipped with slip lock ware (5) on balladeur train (4), hole puncher (3) are fixed on slip lock ware (5), hole puncher (3) are including punching knife tackle (31) to and drive punching knife tackle (31) remove driver (32) of cuting, driver (32) are fixed on slip lock ware (5), punching knife tackle (31) are towards the tool bit hole of stepping down (21), be equipped with between punching knife tackle (31) and perforated plate (2) and supply punching clearance (7) that film (6) pass through.

2. The perforating mechanism of film bag machine as recited in claim 1 further comprising: the sliding frame (4) is two parallel sliding rods, the sliding locking device (5) comprises a sliding block (51) and a locking screw (54), two sliding holes (52) for the sliding rods to be inserted are formed in the sliding block (51), and the locking screw (54) is in threaded connection with the sliding block (51) and extends into the sliding holes (52) to be abutted against the sliding rods.

3. The perforating mechanism of film bag machine as recited in claim 2 further comprising: be equipped with installing support (33) on slider (51), install on installing support (33) hole puncher (3), be equipped with installation through-hole (53) towards hole board (2) on slider (51), knife tackle (31) of punching is located installation through-hole (53), installation through-hole (53) are located between two slide holes (52).

4. The perforating mechanism of film bag machine as recited in claim 1 further comprising: a plurality of sliding lockers (5) are connected on the sliding frame (4) in a sliding way.

5. The perforating mechanism of film bag machine as recited in claim 1 further comprising: the punching knife group (31) comprises a connecting column (311), a hole cutting pipe (312), a limiting head (314) and a spring (315), the end part of the hole cutting pipe (312) is fixed at one end of the connecting column (311), the limiting head (314) is sleeved on the connecting column (311) in a sliding way, the outer wall of one end of the connecting column (311) close to the hole cutting tube (312) is provided with a first limiting convex rib (317), the inner wall of one end of the limiting head (314) far away from the hole cutting pipe (312) is provided with a second limiting convex rib (318) which is abutted against the first limiting convex rib (317) for limiting, a snap spring (316) is arranged on one section of the connecting column (311) far away from the hole cutting pipe (312), one end of the spring (315) props against the limiting head (314), the other end props against the clamp spring (316), when the first limiting convex rib (317) is abutted against the second limiting convex rib (318), the hole cutting pipe (312) is completely positioned in the limiting head (314).

6. The perforating mechanism of film bag machine as recited in claim 5 further comprising: the outer edge of one end, far away from the connecting column (311), of the hole cutting pipe (312) is provided with a cutting edge (313), and the cutting edge (313) faces towards one end, far away from the connecting column (311), in a wavy mode.

7. The perforating mechanism of film bag machine as recited in claim 6 further comprising: the cutting edge (313) is slightly contracted towards the center away from one end of the hole cutting pipe (312).

8. The perforating mechanism of film bag machine as recited in claim 5 further comprising: and the connecting column (311) is provided with a communication through hole (35) communicated with the hole cutting pipe (312).

9. The perforating mechanism of film bag machine as recited in claim 5 further comprising: and a rubber gasket (319) is fixed on the outer edge of a section of the limiting head (314) far away from the connecting column (311).

10. The perforating mechanism of film bag machine as recited in claim 5 further comprising: the connecting column (311) is far away from the section of the hole cutting pipe (312) and is in threaded connection with a driving rod (321) of the driver (32), and a locking nut (34) which is abutted against the hole cutting pipe (312) is in threaded connection with the driving rod (321).