CN216884290U

CN216884290U - Punching waste collection device

Info

Publication number: CN216884290U
Application number: CN202220677029.3U
Authority: CN
Inventors: 余忠文; 余忠春
Original assignee: Xiamen Lesi Packaging Technology Co ltd
Current assignee: Xiamen Lesi Packaging Technology Co ltd
Priority date: 2022-03-25
Filing date: 2022-03-25
Publication date: 2022-07-05
Anticipated expiration: 2032-03-25

Abstract

The application discloses garbage collection device punches a hole, it is including punching a hole the mechanism and collecting the mechanism, it is provided with the end of wasting discharge in the mechanism to punch a hole, collect the mechanism and communicate mutually with the waste discharge end of the mechanism of punching a hole, the waste material piece passes through the end of wasting discharge gets into in the collection mechanism. This application has the clean and tidy effect that keeps the production space.

Description

Punching waste collection device

Technical Field

The application relates to the field of machinery, especially, relate to a garbage collection device punches a hole.

Background

In the process of producing many films, there is a punching process, and during the punching process, waste material pieces punched from the films are generated, and most of the waste material pieces are small in size, light in weight and difficult to collect.

At present mainly through set up waste material piece collecting box below the waste discharge hole of the mechanism of punching a hole, after punching a hole and accomplish, make the waste material piece fall to the waste material piece collecting box in nature, but the waste material piece is in each region of leaving very easily scattering place space behind the waste discharge hole for whole production space is comparatively dirty and disorderly.

SUMMERY OF THE UTILITY MODEL

To the correlation technique among the above, in order to keep the clean and tidy of production space, this application provides a garbage collection device punches a hole.

The application provides a garbage collection device punches a hole adopts following technical scheme:

the utility model provides a garbage collection device punches a hole, is including punching a hole the mechanism and collecting the mechanism, it is provided with the end of wasting discharge to punch a hole the mechanism, collect the mechanism and communicate mutually with the end of wasting discharge of the mechanism of punching a hole, the waste material piece passes through the end of wasting discharge gets into in the collection mechanism.

Through adopting above-mentioned technical scheme, the film is after punching a hole is accomplished to the mechanism of punching a hole, and the waste material piece is discharged through the end of wasting discharge, and the waste material end is linked together with collection mechanism, then can collect by collection mechanism from the waste material piece that the waste material end was discharged, will be handled in unison by the waste material piece that collection mechanism collected after production was accomplished. In the production process, the waste material piece is directly collected by the collection mechanism, can not scatter to the production space in, can make the production space keep clean and tidy, reduces operating personnel's the volume of cleaning.

Preferably, the end of wasting discharge is provided with the pipe of wasting discharge, collect the mechanism and include collecting pipe and return fan, collecting pipe pot head is located on the pipe of wasting discharge, the other end of collecting pipe and the end of breathing in of return fan are linked together mutually, and the waste material piece warp it gets into in the collecting pipe to waste discharge.

Through adopting above-mentioned technical scheme, punching a hole the back that finishes, the waste material piece enters into in the exhaust pipe, and then the end of breathing in of air return machine inhales, inhales the air return machine with the waste material piece through the collecting pipe in, collects the waste material piece and handles in unison.

Preferably, the waste discharge pipe is screwed at the waste discharge end of the punching mechanism.

Through adopting above-mentioned technical scheme, arrange the waste pipe can be comparatively simple equipment on punching a hole mechanism, can be comparatively convenient change when arranging waste pipe and taking place to damage.

Preferably, be provided with spacing subassembly on the waste discharge pipe, spacing subassembly is located the junction of waste discharge pipe and collecting pipe, the collecting pipe cover is located on spacing subassembly.

Through adopting above-mentioned technical scheme, spacing subassembly can prevent that the collecting pipe from droing from arranging the waste pipe after collecting pipe cover is located and is arranged on the waste pipe.

Preferably, the limiting assembly comprises at least two limiting blocks, each limiting block is distributed at intervals along the pipe orifice of the waste discharge pipe, a protruding part with a cambered surface is arranged on one side of each limiting block, which is opposite to the other side, and when the collecting pipe is sleeved on the waste discharge pipe, the protruding parts of the limiting blocks are abutted to the inner wall of the collecting pipe.

By adopting the technical scheme, the protruding parts of the limiting blocks can apply acting force far away from the collecting pipe, so that the collecting pipe is not easy to slide, the stability of the joint of the collecting pipe and the waste discharge pipe can be improved, and the probability of the collecting pipe sliding out from the waste discharge pipe in the working engineering is reduced.

Preferably, spacing subassembly still includes spacing rectangular, spacing rectangular is located the waste discharge pipe, the inside wall of collecting pipe and the one side mouth of pipe department that the waste discharge pipe links to each other is provided with spacing lug, works as when the collecting pipe cover was located on the waste discharge pipe, spacing lug offsets with one side that the stopper was kept away from to spacing rectangular.

Through adopting above-mentioned technical scheme, the collecting pipe cover is located the one end at spacing piece place on the waste discharge pipe, and spacing lug and the mutual butt of spacing rectangular, and spacing lug is located one side that spacing rectangular kept away from the stopper, mutually supports through spacing rectangular and spacing lug, reducible probability that the collecting pipe breaks away from waste discharge pipe in process of production.

Preferably, the collecting mechanism further comprises a collecting bag, the air blowing end of the air return machine is sleeved with the bag opening of the collecting bag, a waste discharge channel is arranged in the air return machine, and the waste material pieces enter the collecting bag through the air blowing end of the waste discharge channel.

Through adopting above-mentioned technical scheme, the waste material piece is inhaled the fan return by the end of breathing in of fan return after, and accessible exhaust passage enters into the return air duct and collects in unison, and after production is accomplished, the workman of being convenient for centralized processing.

Preferably, the punching mechanism includes first driving piece and first punching cutter, first punching cutter is located the top of the end of wasting discharge, and the film is located between first punching cutter and the end of wasting discharge, first driving piece drive first punching cutter is reciprocating motion towards the end of wasting discharge, first punching cutter is die-cut film towards the in-process of wasting discharge end motion.

Through adopting above-mentioned technical scheme, order about first punching a hole through first driving source and die-cut the film, can make this die-cut process remain stable, and can directly take the waste material piece to the end of wasting discharge at die-cut first die-cutting sword of accomplishing, be convenient for collect the mechanism and collect the waste material piece.

Preferably, still include the second mounting panel, the mechanism of punching a hole is located the second mounting panel, and the film is located between the second mounting panel and the mechanism of punching a hole, the mechanism of punching a hole includes second driving piece and control backup pad, be provided with a plurality of second punching knives in the control backup pad, the second driving piece can order about the control backup pad and move towards the second mounting panel, be provided with the end of wasting discharge on the second mounting panel, the end of wasting discharge is linked together with collection mechanism.

By adopting the technical scheme, the second driving source can simultaneously drive the second punching cutters to punch the film, so that resources can be saved; and the waste discharge end on the second mounting plate is communicated with the collecting mechanism, so that the waste material pieces can be collected by the collecting mechanism, and the pollution of the waste material pieces to the production space is avoided.

Preferably, the punching mechanism further comprises a pressing plate, a second guide column is arranged on the pressing plate, one end, far away from the pressing plate, of the second guide column is connected to the control supporting plate in a sliding mode, a return spring is arranged on the second guide column, two ends of the return spring are respectively abutted to the control supporting plate and the pressing plate, each second punching head penetrates through the pressing plate, and the film is located between the pressing plate and the second mounting plate.

Through adopting above-mentioned technical scheme, the control backup pad can drive and press the clamp plate together and push down for press the clamp plate and contact with the film surface, can exert pressure to the film, prevent that the film from moving along with each second die-cutting head together at the in-process that punches a hole.

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

1. the punching waste collection device can keep the production space clean and tidy;

2. the produced waste material sheet can be conveniently treated in a labor-saving manner;

3. one driving piece can drive a plurality of punching knives simultaneously to work, so that energy is saved.

Drawings

FIG. 1 is a schematic view showing the overall structure of a punching scrap collecting apparatus according to the first embodiment;

FIG. 2 is a schematic view showing the structure of a punching mechanism of the punching scrap collecting apparatus according to the first embodiment;

FIG. 3 is a schematic view showing the structure of a waste discharge pipe of the punching scrap collecting apparatus according to the first embodiment;

FIG. 4 is a schematic view showing the structure of a collecting mechanism of the punching scrap collecting apparatus according to the first embodiment;

FIG. 5 is a schematic view showing the overall structure of the punching scrap collecting apparatus according to the second embodiment;

fig. 6 is a partially enlarged view of a portion a in fig. 5.

Description of reference numerals:

1. a frame; 11. mounting a rod; 12. installing a cross bar; 13. a first mounting plate; 14. a second mounting plate; 2. a punching mechanism; 21. mounting blocks; 22. a first driving member; 23. a first punching knife; 24. a waste discharge pipe; 241. a limiting block; 242. a limiting strip; 25. a second driving member; 26. a control support plate; 261. a second punching knife; 262. a first guide assembly; 27. a pressing plate; 271. a second guide assembly; 3. a collection mechanism; 31. a collection tube; 311. a limiting bump; 32. a return fan; 33. and (4) collecting the bags.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The embodiment of the application discloses garbage collection device punches a hole. Referring to fig. 1, the punching scrap collecting apparatus includes a frame 1, a punching mechanism 2, and a collecting mechanism 3.

The first embodiment is as follows:

referring to fig. 1, a frame 1 is used for installing a punching mechanism 2, and a collecting mechanism 3 is communicated with the punching mechanism 2 and can collect waste material pieces generated after the punching mechanism 2 punches a film.

The frame 1 is provided with two opposite installation rods 11, the two installation rods 11 are located on the same horizontal plane, each installation rod 11 is provided with a first sliding groove along the length direction, an installation cross rod 12 is arranged between the two installation rods 11, the two ends of each installation rod 11 are respectively connected into the two first sliding grooves through bolt locking pairs, and the positions of the installation cross rods 12 in the first sliding grooves can be adjusted according to requirements. A plurality of mounting rods 11 can be mounted in the two first sliding grooves according to production requirements, and a mounting cross rod 12 is arranged in the embodiment.

The installation horizontal pole 12 is provided with the second spout, and the second spout is along 12 length direction continuous distributions of installation horizontal pole, and the mechanism 2 of punching a hole is installed in the second spout, can install a plurality of mechanisms 2 of punching a hole according to the production demand in the second mounting groove. Two punching mechanisms 2 are arranged in the embodiment, and the two punching mechanisms 2 are arranged in the second sliding groove in parallel.

Referring to fig. 1 and 2, the punching mechanism 2 includes a first punching blade 23, a first driving member 22, a waste pipe 24, and a mounting block 21. The mounting block 21 is cubic, the mounting block 21 is located on the mounting cross bar 12, and the lower end face of the mounting block 21 is placed on the mounting cross bar 12 and is connected in the second sliding groove through bolt locking.

The installation piece 21 is provided with the groove of punching a hole, and the notch in groove of punching a hole is along the vertical lateral wall of installation piece 21, and in process of production, film direction of delivery level, and the film passes through from two inslots of punching a hole in proper order, accomplishes the process of punching a hole at the inslot that punches a hole.

The mounting block 21 is provided with a first mounting hole and a second mounting hole, the first mounting hole and the second mounting hole are coaxially arranged, the axis direction is vertical, and the first mounting hole is located above the second mounting hole. Two ends of the first and second mounting holes are respectively communicated with the punching groove and the upper space of the mounting block 21, and the second mounting holes are respectively communicated with the punching groove and the lower space of the mounting block 21.

The first driving member 22 is fixedly mounted on the upper end surface of the mounting block 21, the first driving member 22 includes a first driving source and a first driving rod, and the first driving rod is located in the first mounting hole and can slide up and down along the axis of the first mounting hole under the driving of the first driving source. One end, far away from the first driving source, of the first driving rod is connected with a first punching cutter 23 in a threaded mode, the edge of the first punching cutter 23 faces downwards, the first driving rod can drive the first punching cutter 23 to move downwards, so that the edge of the first punching cutter can cut and punch the thin film, and after punching is completed, the waste material pieces are pushed into the second mounting hole. The waste material sheet is far away from the film, and then the first driving rod returns to the initial position, so that the punched film can smoothly enter the next working procedure from the punching groove.

The first drive source is provided as an air cylinder in the present embodiment, and may also be provided as an electric push rod, a hydraulic pump, or the like.

Arrange waste pipe 24 spiro union in the second mounting hole, and punching hole groove, second mounting hole, arrange waste pipe 24 and collection mechanism 3 are linked together, then the waste material piece can be smoothly from punching hole groove through second mounting hole, arrange waste pipe 24 and get into in the collection mechanism 3.

Referring to fig. 3, the lower end of the waste discharge pipe 24 is provided with a limiting assembly, and the limiting assembly comprises a limiting block 241. Stopper 241 has three and equal vertical setting, and three stopper 241 is along arranging waste pipe 24 lower extreme mouth of pipe interval distribution, and each stopper 241 width is unanimous with the 24 pipe wall thickness of waste pipe, and each stopper 241 encloses to close and forms the channel of wasting discharge, and the piece of wasting discharge can pass smoothly in the channel of wasting discharge. The part that each stopper 241 lower extreme kept away from the channel of wasting discharge all is the cambered surface setting and is outstanding form to the one side of keeping away from the channel of wasting discharge, is provided with two spacing rectangular 242 on the waste discharge pipe 24 of each stopper 241 upper end, and each spacing rectangular 242 opposite distributes in the both sides of wasting discharge pipe 24, and the equal level setting of length direction of each spacing rectangular 242.

Referring to fig. 1 and 4, the collecting mechanism 3 includes a blower fan 32, a collecting pipe 31 and a collecting bag 33, one end of the collecting pipe 31 is communicated with a suction end of the blower fan 32, an opening of the collecting bag 33 is sleeved on a blowing end of the blower fan 32, the other end of the collecting pipe 31 is sleeved on a lower end pipe orifice of the waste discharge pipe 24, and the collecting pipe 31 is communicated with the waste discharge pipe 24. The two punching mechanisms 2 in this embodiment are both communicated with the suction end of the same air returning machine 32.

Two limit lugs 311 which are distributed in an opposite mode are arranged on the inner side wall of one end, connected with the waste discharge pipe 24, of the collecting pipe 31, and each limit lug 311 can respectively pass through the area between the two adjacent ends of the two limit strips 242.

When assembling the collecting pipe 31 and the waste discharge pipe 24, an operator applies force to the upper part of the arc surface of the limiting blocks 241 to knead the limiting blocks 241, then the waste discharge pipe 24 is sleeved on the limiting blocks 241, then the pipe orifice of the collecting pipe 31 moves upwards along the limiting blocks 241 and the waste discharge pipe 24, so that the limiting convex blocks 311 move to the upper parts of the two limiting strips 242 from the area between the two limiting strips 242, then the collecting pipe 31 is rotated, the two limiting convex blocks 311 are respectively positioned above the two limiting strips 242, and the lower end surfaces of the limiting convex blocks 311 are abutted to the upper end surfaces of the corresponding limiting strips 242.

After the installation is completed, the cambered surface part of each limiting block 241 is abutted against the inner side wall of the collecting pipe 31, and a force far away from the direction of the waste discharge channel is applied to the abutted part, so that the collecting pipe 31 is not easy to fall off from the waste discharge pipe 24. Each limiting convex block 311 abuts against the corresponding limiting strip 242 and supports the limiting block 241, so that the limiting convex blocks 311 are prevented from moving downwards, the collecting pipe 31 can be prevented from falling off from the waste discharge pipe 24, and the stability in the production process is improved.

The film is in the inslot that punches a hole the back of accomplishing punching a hole, first punching cutter 23 pushes the waste material piece in the second mounting hole, then return air blower 32 begins to operate, breathe in through the end of breathing in, the end of breathing in proper order with collecting pipe 31, arrange useless pipe 24 and second mounting pipe and be linked together, the waste material piece that enters into the second mounting hole under the suction effect gets into in the return air blower 32 through arranging useless pipe 24 and collecting pipe 31, be provided with the waste discharge way in the return air blower 32, can arrange into collection bag 33 from the waste material piece that the end of breathing in got into in the fan in through the end of blowing, unified treatment after production is accomplished, can prevent that the waste material piece from scattering and leading to inconvenient sweeping in each place.

Example two:

referring to fig. 1 and 5, the present embodiment differs from the first embodiment in that the punching mechanism 2 is different.

Be provided with first mounting panel 13 and second mounting panel 14 in the frame 1, first mounting panel 13 and the equal level setting of second mounting panel 14, and first mounting panel 13 is located second mounting panel 14 directly over, and second mounting panel 14 both ends all are provided with the installation riser and pass through the bolt fastening through second mounting panel 14 and installation riser, and two installation riser upper ends pass through the bolt fastening with first mounting panel 13 both ends respectively.

Referring to fig. 6, the punching mechanism 2 includes a second driving member 25, a control support plate 26, and a pressing plate 27.

The second driving member 25 includes a second driving source and a second driving lever having one end connected to the second driving source. In this embodiment, the second driving source is a stamping cylinder, the stamping cylinder is located on the first mounting plate 13 and fixed to the first mounting plate 13 through a bolt, a third mounting hole is formed in the first mounting plate 13 below the hydraulic cylinder, the second driving rod is located in the third mounting hole, and the second driving rod can slide up and down in the third mounting hole under the driving of the stamping cylinder.

The one end that the second actuating lever is located first mounting panel 13 below passes through screw thread fixed connection with control backup pad 26, sets up a plurality of second punching knives 261 on the control backup pad 26, is provided with four in this embodiment, and each second punching knife 261 is equal vertical setting and dispersion distribution on control backup pad 26. When the second driving member 25 drives the control support plate 26, the second punching knives 261 can be driven to press down simultaneously, and one driving member does not need to correspond to one punching knife, so that resources can be saved.

The both sides of punching press cylinder all are provided with first guide assembly 262, and first guide assembly 262 includes uide bushing and first guide post, and the uide bushing is located first mounting panel 13, and the vertical one end that sets up of first guide post is located under first mounting panel 13 passes through bolt fixed connection with control backup pad 26, and the first guide post other end slides and connects in the uide bushing, can prevent control backup pad 26 in control backup pad 26 course of motion from taking place the skew.

Be provided with second guide assembly 271 on pressing the board 27, second guide assembly 271 includes four second guide posts and spacing ring, the equal vertical setting of each second guide post and lower extreme pass through bolt and press board 27 fixed connection, each second guide post upper end is passed control support plate 26 and is located control support plate 26 top, and the spacing ring is located second guide post upper end, the spacing ring external diameter is greater than the aperture that is used for passing the hole of second guide post on the control support plate 26, and the second guide post slides with control support plate 26 and is connected. And a return spring is sleeved on each second guide column between the control support plate 26 and the pressing plate 27, and two ends of each return spring are respectively abutted against the control support plate 26 and the pressing plate 27.

The pressing plate 27 is provided with a plurality of fourth mounting holes, each fourth mounting hole is vertically arranged, the second mounting plate 14 is provided with a plurality of fifth mounting holes, each fifth mounting hole corresponds to the fourth mounting hole one by one, the corresponding fifth mounting holes and the fourth mounting holes are coaxially arranged, the lower ends of the fifth mounting holes are screwed with waste discharge pipes 24, and the waste discharge pipes 24 are respectively communicated with the collecting mechanism 3. And each second punch cutter 261 is movable within the corresponding fifth and fourth mounting holes.

Referring to fig. 5 and 6, during the production process, the film is located between the pressing plate 27 and the second mounting plate 14, the second driving source drives the control support plate 26 to drive each second punching blade 261 to press down, and the control support plate 26 is kept to press down vertically under the limitation of the first guide assembly 262; and then compress the reset spring, drive the pressing plate 27 and push down together, make the pressing plate 27 compress tightly the film between pressing plate 27 and second mounting panel 14, can prevent that the film piece from sliding in the in-process of punching a hole, second punching cutter 261 punches a hole to the film, bring the waste material piece into the fifth mounting hole, collecting mechanism 3 begins to work and collects the waste material piece through arranging waste pipe 24, then control backup pad 26 drives second punching cutter 261 and restores to the original position, under the drive of spacing ring and second guide post, pressing plate 27 also rises thereupon, the film that finishes punching a hole can smoothly get into next process.

The implementation principle of the punching waste collection device in the embodiment of the application is as follows: mechanism 2 that punches a hole communicates with the end of breathing in of air return fan 32, and after punching a hole and accomplish, air return fan 32 end of breathing in inhales the waste material piece and collects in the mechanism 3, collects the back that finishes, together discharges each waste material piece into through the air-out end and collects the bag 33 in, after production finishes, will collect the same processing of the waste material piece in the bag 33, makes the production space remain clean and tidy all the time.

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

Claims

1. The utility model provides a garbage collection device punches a hole, its characterized in that, includes mechanism (2) and collection mechanism (3) of punching a hole, it is provided with the end of wasting discharge on mechanism (2) to punch a hole, collect mechanism (3) and the end of wasting discharge of mechanism (2) of punching a hole and communicate mutually, the waste material piece passes through the end of wasting discharge gets into in collecting mechanism (3).

2. The punch scrap collecting apparatus of claim 1, wherein: the waste discharge end is provided with waste discharge pipe (24), collecting mechanism (3) including collecting pipe (31) and return air machine (32), collecting pipe (31) one end cover is located on waste discharge pipe (24), the other end of collecting pipe (31) is linked together with the end of breathing in of return air machine (32), and the waste material piece warp waste discharge pipe (24) gets into in collecting pipe (31).

3. The punch scrap collecting apparatus of claim 2, wherein: the waste discharge pipe (24) is screwed with the waste discharge end of the punching mechanism (2).

4. The punch scrap collecting apparatus of claim 2, wherein: arrange and be provided with spacing subassembly on useless pipe (24), spacing subassembly is located the junction of arranging useless pipe (24) and collecting pipe (31), collecting pipe (31) cover is located on the spacing subassembly.

5. The punch scrap collecting apparatus of claim 4, wherein: the limiting assembly comprises at least two limiting blocks (241), the limiting blocks (241) are distributed at intervals along the pipe orifice of the waste discharge pipe (24), one side of each limiting block (241), which is opposite to the other side, is provided with a protruding part of an arc surface, and when the collecting pipe (31) is sleeved on the waste discharge pipe (24), the protruding parts of the limiting blocks (241) are abutted to the inner wall of the collecting pipe (31).

6. The punch scrap collecting apparatus of claim 5, wherein: spacing subassembly still includes spacing rectangular (242), spacing rectangular (242) are located waste discharge pipe (24), the inside wall of collecting pipe (31) and the one side mouth of pipe department that waste discharge pipe (24) link to each other is provided with spacing lug (311), works as when waste discharge pipe (24) are located to collecting pipe (31) cover, spacing lug (311) offset with one side that spacing rectangular (242) kept away from stopper (241).

7. The punch scrap collecting apparatus of claim 1, wherein: collect mechanism (3) still including collecting bag (33), the end of blowing of return air machine (32) is located to the sack cover of collecting bag (33), be provided with the waste discharge way in return air machine (32), the waste material piece passes through the waste discharge way gets into in collecting bag (33) through the end of blowing.

8. The punch scrap collecting apparatus of claim 1, wherein: mechanism (2) punches a hole includes first driving piece (22) and first punching knife (23), first punching knife (23) are located the top of wasting discharge end, and the film is located between first punching knife (23) and the wasting discharge end, reciprocating motion is towards wasting discharge end to first driving piece (22) first punching knife (23) of drive, first punching knife (23) are at the die-cut film of the in-process towards wasting discharge end motion.

9. The punch scrap collecting apparatus of claim 1, wherein: still include second mounting panel (14), mechanism (2) of punching a hole is located second mounting panel (14), and the film is located second mounting panel (14) and punch a hole between mechanism (2), it includes second driving piece (25) and control backup pad (26) to punch a hole mechanism (2), be provided with a plurality of second on control backup pad (26) and punch a hole sword (261), control backup pad (26) towards second mounting panel (14) motion can be ordered in second driving piece (25), be provided with the end of wasting discharge on second mounting panel (14), the end of wasting discharge is linked together with collection mechanism (3).

10. The punch scrap collecting apparatus of claim 9, wherein: the punching mechanism (2) further comprises a pressing plate (27), a second guide column is arranged on the pressing plate (27), one end, far away from the pressing plate (27), of the second guide column is connected to the control supporting plate (26) in a sliding mode, a return spring is arranged on the second guide column, two ends of the return spring are respectively abutted to the control supporting plate (26) and the pressing plate (27), each second punching head penetrates through the pressing plate (27), and a film is located between the pressing plate (27) and the second mounting plate (14).