CN215358811U

CN215358811U - Punching device

Info

Publication number: CN215358811U
Application number: CN202121434187.8U
Authority: CN
Inventors: 罗竺; 夏佩佩; 魏征
Original assignee: Yipurun Shanghai Biotechnology Co ltd
Current assignee: Yipurun Shanghai Biotechnology Co ltd
Priority date: 2021-06-25
Filing date: 2021-06-25
Publication date: 2021-12-31
Anticipated expiration: 2031-06-25

Abstract

The utility model provides a punching device which comprises an upper module, a lower module, a limiting plate and a punching needle, wherein at least one punching hole penetrating through the upper surface and the lower surface of the upper module is formed in the upper module along the vertical direction, at least one discharging hole penetrating through the upper surface and the lower surface of the lower module is formed in the lower module along the vertical direction, the punching holes correspond to the discharging holes in a one-to-one mode, an installation gap is formed between the upper module and the lower module, the limiting plate is detachably inserted in the installation gap along the horizontal direction, limiting grooves penetrating through the upper surface and the lower surface of the limiting plate are formed in the limiting plate along the vertical direction, and the shapes of the limiting grooves are matched with those of a film or a sheet to be punched and used for installing the film or the sheet and limiting the film or the sheet. When the limiting groove is used for limiting, pressure cannot be applied to the surface of the membrane material or the sheet material, and loss or deterioration of relevant performance of the membrane material or the sheet material under the action of the pressure can be avoided.

Description

Punching device

Technical Field

The utility model relates to the technical field of machining and manufacturing, in particular to a punching device.

Background

The existing punching device is generally provided with a pressing block, a pressing sheet or other limiting elements, and the limiting elements are used for applying pressure to the film or the sheet to prevent the film or the sheet from moving randomly in the punching process, so that accurate punching is realized. However, some films or sheets may have an adverse effect on performance properties after being pressed during processing. For example, an elastic sheet made of silicone rubber is deformed upon application of pressure, thereby affecting the elastic properties of the elastic sheet; in addition, if the drug is loaded in the elastic sheet, the drug release effect is also affected after the elastic sheet is deformed.

Therefore, there is a need for a punching device that can precisely punch holes in a film or sheet without using pressure to position the film or sheet, so as to avoid the loss or deterioration of the related properties of the film or sheet under the action of pressure.

SUMMERY OF THE UTILITY MODEL

In order to solve at least one of the above technical problems, an object of the present invention is to provide a punching apparatus, which can limit a position of a film or a sheet without applying pressure to the film or the sheet during punching, and can prevent the loss or degradation of the related performance of the film or the sheet under the pressure.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a punching device comprises an upper module and a lower module which are sequentially arranged from top to bottom, and further comprises a limiting plate and a punching needle, wherein at least one punched hole penetrating through the upper surface and the lower surface of the upper module is formed in the upper module in the vertical direction, at least one discharging hole penetrating through the upper surface and the lower surface of the lower module is formed in the lower module in the vertical direction, the punched holes correspond to the discharging holes in a one-to-one manner, an installation gap is formed between the upper module and the lower module, the limiting plate is detachably inserted in the installation gap in the horizontal direction, a limiting groove penetrating through the upper surface and the lower surface of the limiting plate is formed in the limiting plate in the vertical direction, the shape of the limiting groove is matched with that of a film or a sheet to be punched and is used for installing the film or the sheet and limiting the film or the sheet, when punching, the punching needle sequentially penetrates through the punched hole and the film or sheet and at least partially extends into the corresponding discharge hole.

In one embodiment, the height of the limiting plate is h1, the height of the film or the sheet is h2, h1 is more than h2, and 1mm < h1-h2 is less than 2 mm.

In one embodiment, the punching device further comprises a fixing piece, a fixing hole is formed in the lower module, a through hole is formed in the limiting plate corresponding to the fixing hole, when the limiting plate is inserted into the installation gap, the through holes correspond to the fixing holes one to one, and the fixing piece penetrates through the through holes and is detachably connected with the corresponding fixing holes.

In one embodiment, the punch pin is a solid cylinder of constant diameter.

In one embodiment, the punch needle has a piercing end and an operating end which are arranged oppositely, and a limiting part is arranged at the operating end.

In one embodiment, the height of the upper module is h3, the height of the mounting gap is h4, the height of the lower module is h5, and the length l of the punch pin is greater than h3+ h4+ h 5.

In one embodiment, the punched hole has an aperture r1, the discharge hole has an aperture r2, the punch pin has a diameter r3, r1 > r3, and r2 > r 3.

In one embodiment, when the membrane material or the sheet material is made of silicon rubber, and the aperture of the final hole required by the membrane material or the sheet material is r4, r3/r4 is 1.1-1.2.

In one embodiment, the punching device further comprises a connecting plate, the punching needles are mounted on the connecting plate, and the number of the punching needles on the connecting plate is 2-5.

In one embodiment, the connecting plate is further provided with guide posts, the upper module is provided with first guide holes, the lower module is provided with second guide holes, the number of the guide posts, the number of the first guide holes and the number of the second guide holes are equal, the guide posts, the first guide holes and the second guide holes correspond to one another one by one, one guide post is inserted into one first guide hole and penetrates through the mounting gap to extend into the corresponding second guide hole, and compared with the prior art, the connecting plate has the following beneficial effects:

the punching device comprises a limiting plate provided with a limiting groove, and the shape of the limiting groove is matched with that of a film or a sheet to be punched. The film or the sheet to be punched is arranged in the limiting groove, and the limiting groove can limit the film or the sheet to prevent the film or the sheet from moving randomly. And when the limiting groove is used for limiting, pressure cannot be applied to the surface of the membrane material or the sheet material, so that loss or deterioration of relevant performance of the membrane material or the sheet material under the action of the pressure can be avoided.

Drawings

FIG. 1 is a schematic view of the punching apparatus of the present invention.

Fig. 2 is a schematic structural diagram of a limiting plate of the perforating device shown in fig. 1.

Fig. 3 is a schematic structural view of a mounting base of the punching apparatus shown in fig. 1.

Fig. 4 is a right side view of the mount shown in fig. 3.

Fig. 5 is a top view of the mount shown in fig. 3.

Figure 6 is a schematic diagram of the construction of one of the punch assemblies of the present invention.

Figure 7 is a bottom view of the punch assembly of figure 6.

Figure 8 is a schematic diagram of another punch assembly of the present invention.

Figure 9 is a bottom view of the punch assembly of figure 8.

Fig. 10 is a schematic structural view of a mount according to another embodiment of the present invention.

Reference numerals:

the upper module 1, a punched hole 11, a main body part 12, a side part 13 and a first guide hole 14;

the lower module 2, a discharge hole 21, a fixing hole 22 and a second guide hole 23;

the limiting plate 3, the limiting groove 31, the first side 32, the second side 33 and the through hole 34;

a mounting gap 4; a connecting block 5; punching needles 6; a connecting plate 7; and a guide post 8.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments. It should be understood by those skilled in the art that the specific embodiments are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.

Referring to fig. 1 to 5, the present invention provides a punching apparatus, which includes an upper module 1 and a lower module 2, a limiting plate 3 and a punching pin 6. The upper module 1 is provided with at least one punched hole 11 penetrating through the upper surface and the lower surface of the upper module 1 along the vertical direction, the lower module 2 is provided with at least one discharge hole 21 penetrating through the upper surface and the lower surface of the lower module 2 along the vertical direction, and the punched holes 11 correspond to the discharge holes 21 one to one. An installation gap 4 is arranged between the upper module 1 and the lower module 2, and the limiting plate 3 is detachably inserted in the installation gap 4 along the horizontal direction. Limiting grooves 31 penetrating through the upper surface and the lower surface of the limiting plate 3 are formed in the limiting plate 3 in the vertical direction, the shape of each limiting groove 31 is matched with that of a film or a sheet to be punched, the limiting grooves are used for installing the film or the sheet, the film or the sheet is limited, and the film or the sheet is prevented from moving randomly. During punching, the punching pin 6 passes through the punching hole 11, the film material or the sheet material in sequence, and at least partially extends into the corresponding discharge hole 21.

Specifically, a film or a sheet is first installed in the limiting groove 31; then, the limiting plate 3 is inserted into the mounting gap 4 along the horizontal direction; finally, the punching needle 6 is sequentially penetrated through the punching hole 11, the film material or the sheet material, and at least partially extends into the corresponding discharge hole 21 to complete the punching. The waste material formed by the perforation is discharged through the discharge hole 21. After the punching is finished, the punching needle 6 is firstly pulled out, then the limiting plate 3 is taken out, and finally, the film or the sheet can be taken out from the limiting groove 31 of the limiting plate 3.

In the punching process, the upper surface of the lower module 2 provides support for the film or the sheet so that the punching needle 6 can exert a piercing force on the film or the sheet; the 11 that punches a hole plays the guide effect to the puncture action of punching needle 6 to, the shape of spacing groove 31 and the shape phase-match of the membrane material or the sheet of waiting to punch, play limiting displacement to membrane material or sheet, can prevent that membrane material or sheet from removing wantonly, like this, 11 and the two-phase cooperation of spacing groove 31 punch a hole, can realize accurate punching. In addition, the limiting groove 31 is used for limiting, pressure is not applied to the membrane material or the sheet material, and loss or deterioration of relevant performance of the membrane material or the sheet material under the action of the pressure can be avoided. After punching is finished, the film or the sheet can obtain holes with burr-free edges and sizes meeting the requirements.

Referring to fig. 1 and fig. 3 to 5, the upper module 1 is an irregular block, which is substantially a Y-shaped block, and includes a main body 12 and two side portions 13 symmetrically disposed at one end of the main body 12. The end of the main body part 12 far away from the side part 13 is provided with three punched holes 11, and the connecting lines of the three punched holes 11 form an equilateral triangle; the two side parts 13 are respectively provided with a punching hole 11, the total number of the two punching holes 11 is two, and the connecting line of the two punching holes 11 is parallel to and opposite to the bottom edge of the equilateral triangle; the apertures of all the punched holes 11 are equal. It is understood that in other embodiments, not shown, the upper module 1 may also be designed in a regular shape, for example, a rectangular parallelepiped or a square cube, without limitation. In addition, it should be understood that, in other embodiments not shown, the number of the punched holes 11, the distribution of the punched holes 11 on the upper module 1, the hole diameters of the punched holes 11, and the like can be adjusted according to actual situations, and are not limited herein.

Lower module 2 is the cuboid structure, sets up bin outlet 21 on lower module 2 and punches a hole 11 one-to-one, and the aperture of bin outlet 21 is all equal.

It should be noted that the orthographic projection area of the upper module 1 on the upper surface of the lower module 2 is smaller than the area of the upper surface of the lower module 2, and the distances from the two side surfaces of the upper module 1 to the corresponding two side edges of the upper surface of the lower module 2 are equal, so that the two sides of the upper module 1 can provide an operation space for an operator, and the operator can conveniently insert the limiting plate 3 into the installation gap 4 or take out the limiting plate from the installation gap 4.

A connecting block 5 is arranged between the upper module 1 and the lower module 2. Specifically, the connecting block 5 is a rectangular parallelepiped structure, and the connecting block 5 is disposed on the upper surface of the lower module 2 along one of the long edges of the upper surface of the lower module 2, and the lower surface of the connecting block 5 is connected to the upper surface of the lower module 2, and both form an "L" shaped block. One of the side surfaces of the upper block 1 (specifically, the side surface of the end of the body portion 12 remote from the side portion 13) is connected to the side surface of the connecting block 5 facing the lower block 2, and the upper surface of the upper block 1 is flush with the upper surface of the connecting block 5. The upper module 1, the lower module 2 and the connecting block 5 jointly form a mounting seat. In the present embodiment, the upper module 1, the lower module 2 and the connecting block 5 are integrally formed, but it should be understood that in other embodiments not shown, the upper module 1, the lower module 2 and the connecting block 5 may be fixedly connected by welding, bonding or the like after being formed, respectively.

Referring to fig. 1 and 2, the limiting plate 3 is a rectangular plate-shaped structure, and two sides corresponding to two long sides of the limiting plate 3 are a first side 32 and a second side 33, respectively. When the limiting plate 3 is inserted into the mounting gap 4, the first side 32 abuts against the connecting block 5, the second side 33 is aligned with the long side of the upper surface of the lower module 2 opposite to the connecting block 5, and in addition, the two wide sides of the limiting plate 3 are aligned with the two wide sides of the upper surface of the lower module 2 respectively. In this embodiment, the film or sheet is trapezoidal, and accordingly, the stopper groove 31 is provided as a trapezoidal groove, and the upper bottom of the trapezoidal groove is provided near the first side 32 and the lower bottom of the trapezoidal groove is provided near the second side 33. It is understood that in other embodiments not shown, the limiting groove 31 may be a through groove with other shapes, such as a square groove, a circular groove, etc., as long as the shape matches with the shape of the film or the sheet, and is not limited herein.

In order to facilitate loading or unloading of the film or sheet, and also to accommodate trapezoidal films or sheets of different heights, the lower base of the trapezoidal groove extends through the second side 33.

In addition, the height of the limiting plate 3 is h1, the height of the film or the sheet is h2, and in order to conveniently load or take out the film or the sheet and not influence the punching of the punching needle 6, the requirements of: h1 is more than h2, and h1 is more than 1mm and h2 is more than 2 mm.

Referring to fig. 1 to 3, in order to fix the limiting plate 3 and prevent the limiting plate 3 from moving randomly during the punching process, the punching apparatus of the present invention further includes a fixing member, the lower module 2 is provided with a fixing hole 22, the limiting plate 3 is provided with a through hole 34 corresponding to the fixing hole 22, when the limiting plate 3 is inserted into the mounting gap 4, the through holes 34 correspond to the fixing holes 22 one by one, and the fixing member passes through the through hole 34 and is detachably connected to the corresponding fixing hole 22. In the present embodiment, the fixing member is a bolt, the fixing hole 22 is a screw hole, and the fixing member is screwed into the fixing hole 22. It will be appreciated that in other embodiments not shown, the fixing member and the fixing hole 22 may be detachably connected in other manners, for example, the fixing member is a magnetic member, the fixing hole 22 is a magnetic attraction hole, and the two are magnetically connected; for another example, the fixing member is a cylinder, the fixing hole 22 is a socket, and the cylinder is detachably inserted into the socket. In addition, in this embodiment, there are two fixing members, and there are two fixing holes 22, where the two fixing holes 22 are respectively disposed near the two short sides of the upper surface of the lower module 2, and correspondingly, there are two through holes 34, and the two through holes 34 are respectively disposed near the two short sides of the limiting plate 3. It is understood that in other embodiments not shown, the number of the fixing members, the fixing holes 22 and the through holes 34 can be adjusted according to actual requirements, and is not limited herein.

The punching needle 6 is a solid cylinder with equal diameter, so that when the punching needle 6 is stressed to puncture, the whole end surface of the punching needle 6 is contacted with the film material or the sheet material, and a complete hole without burrs can be formed.

In order to facilitate holding the punch needle 6 and limit the puncture stroke of the punch needle 6 during punching, the punch needle 6 has a puncture end and an operation end which are arranged oppositely, and a limit part is arranged at the operation end. The operator holds the limit part to operate the punching needle 6, and when the limit part is abutted against the upper surface of the upper module 1, the punching needle 6 is shown to be punctured in place. In one embodiment, the limiting part and the punching needle 6 are matched to form a T-shaped needle body.

In order to facilitate the discharge of the waste material formed by the punching through the discharge hole 21, in one embodiment, the punching pin 6 passes through the punching hole 11, the film material or the sheet material in sequence and then passes through the discharge hole 21, so that the punching pin 6 can push the waste material out of the discharge hole 21 completely to prevent the discharge hole 21 from being blocked. Specifically, the height of the upper module 1 is h3, the height of the mounting gap 4 is h4, the height of the lower module 2 is h5, and the length l of the punch pin 6 is greater than h3+ h4+ h 5.

To facilitate passage of punch pin 6 through punch hole 11 and at least partially into discharge opening 21, in one embodiment, punch hole 11 has an aperture r1, discharge opening 21 has an aperture r2, punch pin 6 has a diameter r3, r1 > r3, and r2 > r 3. Further, r1 is r2, because the upper surface of the lower module 2 needs to provide support for the film or sheet, and if r2 is too large, the portion around the hole on the film or sheet is not supported, so that the portion is deformed, and a regular and smooth hole cannot be obtained; if r2 < r1, the waste generated by punching may not be discharged smoothly.

In order to allow the stopper plate 3 to be smoothly inserted into the mounting gap 4, it is necessary that the height h4 of the mounting gap 4 be greater than the height h1 of the stopper plate 3. However, the height h4 of the installation gap 4 must not be too large. This is because although the punched hole 11 provides a certain guide for the movement of the punch pin 6, the hole diameter r1 of the punched hole 11 is larger than the diameter r3 of the punch pin 6, and in this case, if the stroke of the punch pin 6 is too large, the punch pin 6 may be displaced so that precise punching cannot be performed, and the film or sheet may be damaged. In order to shorten the travel of the punch pin 6 as much as possible, it is necessary to make the height h4 of the installation gap 4 as small as possible. Thus, in a preferred embodiment, 1mm < h4-h1 < 2 mm.

When the film or the sheet has certain elasticity, an initial hole can be formed on the film or the sheet after the punching needle 6 penetrates, and after the punching needle 6 is pulled out, the film or the sheet can shrink around the initial hole under the action of the elasticity, and finally a final hole is formed. Under the effect of shrinkage, the pore size of the final pore is less than that of the initial pore. In order to make the pore diameter of the final pore meet the use requirement, the inventor has found through a plurality of experiments that when the membrane material or the sheet material is made of silicon rubber, and the pore diameter of the final pore required by the membrane material or the sheet material is r4, the diameter r3 of the punching needle 6 needs to meet: r3/r4 is 1.1-1.2.

In addition, it should be noted that the film or sheet may be biased by force during the process of pulling out the punch pin 6. If a plurality of holes are to be punched in the film or sheet, a plurality of punching pins 6 are required. In order to prevent the film or sheet from being displaced by the punching pins 6, the punching pins 6 need to be pulled out one by one after all the punching is completed.

Referring to fig. 6 to 10, when a plurality of holes need to be punched on the film or the sheet, a plurality of punching pins 6 can be linked to save time and labor, thereby realizing rapid mass production. Specifically, the plurality of punching pins 6 are mounted on the connecting plate 7, and the plurality of punching pins 6 can be interlocked, that is, a plurality of holes can be punched in the film or the sheet by pressing the connecting plate 7 at a time.

Further, the connecting plate 7 is further provided with guide posts 8, the upper module 1 is provided with first guide holes 14, the lower module 2 is provided with second guide holes 23, the number of the guide posts 8, the number of the first guide holes 14 and the number of the second guide holes 23 are equal, and the guide posts 8, the first guide holes 14 and the second guide holes 23 correspond to one another. Specifically, one guide post 8 is inserted into one first guide hole 14, and extends into the corresponding second guide hole 23 after passing through the mounting gap 4. Under the guidance of the guide columns 8, the first guide holes 14 and the second guide holes 23, the punching pins 6 can be ensured to move along the corresponding punching holes 11 and the corresponding discharge holes 21. Like this, can set up automation equipment that hydraulic means etc. can reciprocate and be connected with connecting plate 7, drive through connecting plate 7 and dash the motion of needle 6, realize automatic large-scale production. The connecting plate 3, the plurality of punching pins 6 arranged on the connecting plate 7 and the guide posts 8 arranged on the connecting plate 7 together form a punching assembly.

It will be appreciated that the more punching pins 6 that are operated simultaneously, the greater the resistance experienced. With a large resistance, the punching needle 6 is forcibly moved, which may damage the punching needle 6, and/or may break the film or sheet. Therefore, the number of the linked punching pins 6 is not limited to be too large, and preferably, the number of the linked punching pins 6 is 2 to 5. In the present embodiment, two connection plates 7 are provided. Three punching needles 6 are arranged on one connecting plate 7 and correspond to the three punching holes 11 arranged on the main body part 12 one by one; two punching pins 6 are arranged on the other connecting plate 7, and correspond to the two punching holes 11 arranged on the two side parts 13 one by one. In order to stably guide the punch pin 6 to move, two guide posts 8 are arranged on the two connecting plates 7.

The utility model provides a punching device which is provided with an upper module 1, a lower module 2, a limiting plate 3 and a punching needle 6. The upper module 1 is provided with at least one punched hole 11 penetrating through the upper surface and the lower surface of the upper module 1, the lower module 2 is provided with at least one discharge hole 21 penetrating through the upper surface and the lower surface of the lower module 2, and the punched holes 11 correspond to the discharge holes 21 one to one. An installation gap 4 is provided between the upper module 1 and the lower module 2. The stopper plate 3 is detachably inserted in the mounting gap 4 in the horizontal direction. Limiting grooves 31 penetrating through the upper surface and the lower surface of the limiting plate 3 are formed in the limiting plate 3, and the shapes of the limiting grooves 31 are matched with those of a film or a sheet to be punched and used for punching the film or the sheet. The punching needle 6 penetrates through the punching hole 11, the film or the sheet in sequence and at least partially extends into the corresponding discharge hole 21, so that punching of the film or the sheet can be realized. In the punching process, the limiting groove 31 can limit the film or the sheet to prevent the film or the sheet from moving randomly; in addition, the limiting groove 31 is used for limiting, pressure is not applied to the membrane material or the sheet material, and loss or deterioration of relevant performance of the membrane material or the sheet material under the action of the pressure can be avoided.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

In the description of the present invention, "a plurality" means two or more.

In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.

In the description of the present invention, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween.

In the description of the utility model, "above", "over" and "above" a first feature in a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.

In the description of the present invention, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are within the scope and disclosure of the present invention.

Claims

1. A perforating device is characterized in that: the punching device comprises an upper module and a lower module which are sequentially arranged from top to bottom, and also comprises a limiting plate and a punching needle, wherein at least one punched hole penetrating through the upper surface and the lower surface of the upper module is arranged on the upper module along the vertical direction, at least one discharge hole penetrating through the upper surface and the lower surface of the lower module is arranged on the lower module along the vertical direction, the punched holes correspond to the discharge holes one by one, an installation gap is arranged between the upper module and the lower module, the limiting plate is detachably inserted in the installation gap along the horizontal direction, a limiting groove penetrating through the upper surface and the lower surface of the limiting plate is arranged on the limiting plate along the vertical direction, the shape of the limiting groove is matched with that of a film or a sheet to be punched, the limiting groove is used for installing the film or the sheet and limiting the film or the sheet, the punching needle sequentially penetrates through the punched hole and the film or sheet and at least partially extends into the corresponding discharge hole.

2. The punch device of claim 1, wherein: the height of the limiting plate is h1, the height of the film or the sheet is h2, h1 is more than h2, and 1mm is more than h1-h2 is less than 2 mm.

3. The punch device of claim 1, wherein: the punching device further comprises a fixing piece, a fixing hole is formed in the lower module, a through hole is formed in the limiting plate corresponding to the fixing hole, when the limiting plate is inserted into the installation gap, the through holes correspond to the fixing holes one to one, and the fixing piece penetrates through the through holes and is detachably connected with the corresponding fixing holes.

4. The punch device of claim 1, wherein: the punching needle is a solid cylinder with equal diameter.

5. The punching apparatus according to any one of claims 1 to 4, wherein: the punch needle is provided with a puncture end and an operation end which are arranged oppositely, and the operation end is provided with a limiting part.

6. The punching apparatus according to any one of claims 1 to 4, wherein: the height of the upper module is h3, the height of the mounting gap is h4, the height of the lower module is h5, and the length l of the punching pin is larger than h3+ h4+ h 5.

7. The punch device of claim 4, wherein: the hole diameter of the punching hole is r1, the hole diameter of the discharge hole is r2, the diameter of the punching needle is r3, r1 is more than r3, and r2 is more than r 3.

8. The punch device of claim 7, wherein: when the membrane material or the sheet material is made of silicon rubber, and the aperture of the final hole required by the membrane material or the sheet material is r4, r3/r4 is 1.1-1.2.

9. The punching apparatus according to any one of claims 1 to 4, wherein: the punching device further comprises a connecting plate, the punching needles are mounted on the connecting plate, and the number of the punching needles on the connecting plate is 2-5.

10. The punch device of claim 9, wherein: the connecting plate is further provided with guide posts, the upper module is provided with first guide holes, the lower module is provided with second guide holes, the number of the guide posts, the number of the first guide holes and the number of the second guide holes are equal, the guide posts, the first guide holes and the second guide holes correspond to one another one by one, and one guide post is inserted into one first guide hole and penetrates through the mounting gap to extend into the corresponding second guide hole.