Punching die

Abstract

The embodiment of the utility model provides a stamping die which comprises an upper die assembly and a lower die assembly, and the upper die assembly comprises a male die; the lower die assembly is arranged on the bottom side of the upper die assembly and comprises a female die, a top plate and an elastic piece, the female die is provided with a cavity opposite to the male die, the top plate is movably arranged in the cavity and used for bearing a workpiece, the elastic piece is arranged in the cavity and abuts against the top plate, the elastic piece applies elastic force towards the male die to the top plate, and the female die is provided with a limiting part. The limiting part abuts against the top plate to limit the top plate to leave the cavity. The female die is provided with a limiting part, when the elastic piece drives the top plate to move towards the male die in the cavity, the limiting part can abut against the top plate to limit the top plate to leave the cavity, and therefore the risk that the top plate leaves the cavity when reset can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to paper product manufacturing field especially, and relates to a punch. BACKGROUND

[0002] Paper lunch box is widely used in catering industry, and in the production process, usually needs to carry out the stamping to paper lunch box through the punch to complete the processing of paper lunch box. In prior art, paper lunch box is prone to wrinkle in the stamping process, the cavity of the concave die of punch is usually provided with a top plate and a sponge under the top plate, the male die presses the paper lunch box into the cavity when the punch closes, the top plate and the paper lunch box abut in this process, the paper lunch box drives the top plate to move, the top plate extrudes the sponge and makes the sponge elastically deform when moving, the top plate and the sponge jointly provide certain support to the paper lunch box, and the top plate and the sponge can cooperate to reduce the risk of wrinkle of paper lunch box. The sponge rebounds and makes the top plate reset when the punch opens, however, the rebounding amount of the sponge is not fixed, which can push the top plate out of the cavity, thereby affecting the feeding of paper lunch box. SUMMARY

[0003] The utility model aims at at least one of the technical problems existing in prior art. To this end, the utility model provides a punch, which can reduce the risk of the top plate leaving the cavity when resetting.

[0004] The utility model embodiment provides a punch, the punch includes: upper die assembly and lower die assembly, the upper die assembly includes male die, the lower die assembly is located at the bottom side of the upper die assembly, and the lower die assembly includes concave die, top plate and elastic piece, the concave die is provided with the cavity opposite to the male die, the top plate is movably arranged in the cavity and is used for bearing workpiece, and the elastic piece is arranged in the cavity and abuts with the top plate, the elastic piece applies the elastic force towards the male die to the top plate, and the concave die is provided with limiting portion, and the limiting portion abuts with the top plate to limit the top plate from leaving the cavity.

[0005] The punch provided by the utility model embodiment has at least the following beneficial effects:

[0006] The concave die is provided with limiting portion, when the elastic piece drives the top plate to move towards the male die in the cavity, the limiting portion can limit the top plate from leaving the cavity by abutting with the top plate, thereby reducing the risk of the top plate leaving the cavity when resetting.

[0007] In one embodiment of the embodiment, the concave die includes lower die plate and limiting plate, the lower die plate is provided with the cavity, the limiting plate is located at the top side of the lower die plate and at least partially extends to the top side of the cavity to form the limiting portion.

[0008] In one embodiment of the embodiment, the limiting portion is annular corresponding to the opening of the cavity.

[0009] In one embodiment of the embodiment, the lower die plate comprises a bottom plate and an intermediate plate, one side of the intermediate plate is connected with the limiting plate, and the other side of the intermediate plate is connected with the bottom plate through a buffer.

[0010] In one embodiment of the embodiment, the number of the male dies and the number of the cavities are both plural, and the male dies and the cavities are arranged in one-to-one correspondence.

[0011] In one embodiment of the embodiment, the cavity is provided with a mounting hole, and the elastic member is mounted in the mounting hole.

[0012] In one embodiment of the embodiment, the upper die assembly comprises an upper die plate, and a plurality of the male dies are detachably mounted on the upper die plate.

[0013] In one embodiment of the embodiment, the male die is provided with an adsorption structure, and the adsorption structure is used for adsorbing the workpiece.

[0014] In one embodiment of the embodiment, the male die and the female die are both provided with a trimming structure, a plane perpendicular to the mold opening and closing direction is defined as a projection plane, a projection of the trimming structure on the projection plane surrounds a projection of the cavity on the projection plane, and the trimming structure is used for cutting off the workpiece along a path surrounding the cavity.

[0015] In one embodiment of the embodiment, the trimming structure on the female die is detachable.

[0016] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0017] The present application will be further described below in conjunction with the drawings and embodiments, wherein:

[0018] Figure 1 is a schematic diagram of a die three-dimensional structure under one embodiment of the embodiment of the present application;

[0019] Figure 2 is Figure 1 a top view of the die of

[0020] Figure 3 is Figure 2 a sectional view of the die of along the A-A direction;

[0021] Figure 4 is Figure 3 a partial enlarged view of the B region of the die of

[0022] Figure 5 is Figure 1Partial structural exploded schematic view of the punch die;

[0023] Figure 6 is Figure 4 Structural schematic view of the punch and the workpiece.

[0024] Punch die 100; upper die assembly 10; upper die plate 11; punch 12; suction structure 121; lower die assembly 20; concave die 21; cavity 22; top plate 221; elastic member 222; mounting hole 223; limiting portion 224; lower die plate 23; limiting plate 24; bottom plate 25; intermediate plate 26; buffer 27; edge cutting structure 31; workpiece 41; contact surface 42. DETAILED DESCRIPTION

[0025] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are used only for explaining the present application, and cannot be understood as a limitation of the present application.

[0026] In the description of the present application, it should be understood that, if the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation of the present application.

[0027] In the description of the present application, the meaning of several is more than one, the meaning of multiple is more than two, greater than, less than, more than, etc. are understood as not including the number, above, below, etc. are understood as including the number. If the first, second is described only for the purpose of distinguishing technical features, it cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of indicated technical features.

[0028] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be interpreted broadly, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0029] In the description of the utility model, the description of the reference terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are contained in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0030] Please refer to Figures 1 to 5 , Figure 1 is a punch 100 three-dimensional structure schematic diagram under the embodiment of the utility model embodiment; Figure 2 is Figure 1 the punch 100 plan view; Figure 3 is Figure 2 the punch along the direction of section view of A-A; Figure 4 is Figure 3 the punch of B area of the local enlarged view; Figure 5 is Figure 1 the partial structure exploded schematic diagram of the punch 100 of the utility model embodiment. The utility model embodiment provides a punch 100, the punch 100 includes upper die assembly 10 and lower die assembly 20, and the upper die assembly 10 includes a male die 12;Lower die assembly 20 is arranged at the bottom side of upper die assembly 10, and the lower die assembly 20 includes a female die 21, a top plate 221 and an elastic element 222, the female die 21 is provided with a cavity 22 opposite to the male die 12, the top plate 221 is movably arranged in the cavity 22 and is used for bearing a workpiece 41, and the elastic element 222 is arranged in the cavity 22 and abuts against the top plate 221, the elastic element 222 applies an elastic force to the top plate 221 towards the male die 12, and the female die 21 is provided with a limiting portion 224, the limiting portion 224 abuts against the top plate 221 to limit the top plate 221 from leaving the cavity 22.

[0031] Specifically, the elastic element 222 is a spring, the spring can be stretched and contracted along the die opening direction, the spring is arranged at the bottom side of the top plate 221, one end of the spring is connected with the bottom wall of the cavity 22, the other end is connected with the bottom surface of the top plate 221, four springs are arranged in the cavity 22, the four springs are arranged at intervals, the limiting portion 224 is located on the side of the top plate 221 away from the bottom wall of the cavity 22, and the limiting portion 224 forms a contact surface 42 perpendicular to the die opening direction. In the die closing process, the male die 12 drives the workpiece 41 into the cavity 22 and pushes the top plate 221 to move along the die closing direction, so that the top plate 221 is close to the bottom wall of the cavity 22, and the spring is compressed and gradually shortened in the process. In the die opening process, the male die 12 leaves the cavity 22, the spring pushes the top plate 221 to move along the die opening direction, and the top plate 221 stops moving after abutting against the contact surface 42.

[0032] It can be understood that the four springs are arranged to reduce the risk of deflection of the top plate 221 during movement. The contact surface 42 perpendicular to the mold opening and closing direction of the limiting portion 224 can abut against the top plate 221, and can generate a force along the mold closing direction on the top plate 221, thereby limiting the movement distance of the top plate 221, and further limiting the top plate 221 from leaving the cavity 22.

[0033] In the embodiments of the utility model, the die 21 is provided with a limiting portion 224. When the elastic member 222 drives the top plate 221 to move in the cavity 22 towards the punch 12, the limiting portion 224 can limit the top plate 221 from leaving the cavity 22 by abutting against the top plate 221, thereby reducing the risk of the top plate 221 leaving the cavity 22 during resetting.

[0034] In one embodiment of the embodiment, please refer to Figure 4 The die 21 includes a lower die plate 23 and a limiting plate 24. The lower die plate 23 is provided with a cavity 22. The limiting plate 24 is arranged on the top side of the lower die plate 23 and extends at least partially to the top side of the cavity 22 to form the limiting portion 224.

[0035] Specifically, the limiting plate 24 extends to the top side of the cavity 22 and covers part of the opening of the cavity 22 (not numbered) from the top side of the cavity 22, and is provided with a contact surface 42 perpendicular to the mold opening and closing direction.

[0036] It can be understood that the contact surface 42 perpendicular to the mold opening and closing direction can abut against the top plate 221. When the contact surface 42 perpendicular to the mold opening and closing direction abuts against the top plate 221, it can provide a force along the mold closing direction on the top plate 221, which is conducive to limiting the top plate 221 from leaving the opening of the cavity 22 to reduce the risk of the top plate 221 leaving the cavity 22 during resetting.

[0037] In one embodiment of the embodiment, please refer to Figure 4 and Figure 5 The limiting portion 224 is annular corresponding to the opening of the cavity 22.

[0038] Specifically, the limiting plate 24 is annular and is adapted to the shape of the opening (not numbered) of the cavity 22. The size of the annular hollow portion of the limiting plate 24 is smaller than the size of the opening of the cavity 22.

[0039] It can be understood that the size of the annular hollow portion of the limiting plate 24 is smaller than the size of the opening of the cavity 22, so that the limiting plate 24 partially covers the opening of the cavity 22 and forms the annular limiting portion 224. The contact surface 42 on the limiting portion 224 is annular, and the annular contact surface 42 can abut against the top plate 221, which is conducive to reducing the risk of deflection of the top plate 221 when the limiting portion 224 abuts against the top plate 221.

[0040] In one embodiment of the embodiment, please refer to Figure 4and Figure 5 The lower die plate 23 comprises a bottom plate 25 and an intermediate plate 26, one side of the intermediate plate 26 is connected with the limiting plate 24, and the other side of the intermediate plate 26 is connected with the bottom plate 25 through a buffer 27.

[0041] Specifically, the buffer 27 is a rubber ring, and a rubber ring mounting groove (not numbered) is formed on the bottom plate 25, the rubber ring is mounted in the rubber ring mounting groove,

[0042] The rubber ring abuts against the groove wall (not numbered) of the rubber ring mounting groove, part of the rubber ring extends out of the rubber ring mounting groove from the opening (not numbered) of the rubber ring mounting groove, and abuts against the intermediate plate 26, and a pin (not shown) is further arranged between the intermediate plate 26 and the bottom plate 25.

[0043] It can be understood that the intermediate plate 26 is pushed by the male die 12 when the die 100 is closed, and is close to the bottom plate 25 in the closing direction and compresses the buffer 27. The buffer 27 can provide buffering for the closing process of the die 100, which is beneficial to improve the service life of the die 100. The pin between the intermediate plate 26 and the bottom plate 25 can limit the movement of the intermediate plate 26 in the direction other than the opening and closing direction.

[0044] In an embodiment of this embodiment, in combination with Figure 3 and Figure 5 The number of the male die 12 and the cavity 22 is multiple, and is one-to-one corresponding.

[0045] Specifically, the plurality of male dies 12 and cavities 22 are arranged in an array. It can be understood that the plurality of male dies 12 and cavities 22 are arranged, so that the number of workpieces 41 processed by the die 100 each time is increased, which is beneficial to improve the production efficiency of the die 100.

[0046] In an embodiment of this embodiment, in combination with Figure 5 An installation hole 223 is formed in the cavity 22, and the elastic element 222 is installed in the installation hole 223.

[0047] Specifically, the installation hole 223 is arranged on the bottom wall (not numbered) of the cavity 22, the axis direction of the installation hole 223 is parallel to the opening and closing direction, the elastic element 222 is a spring, and the radius of the installation hole 223 is matched with the spring.

[0048] It can be understood that the installation hole 223 can facilitate the installation of the elastic element 222, and is also beneficial to reduce the risk of deflection of the elastic element 222.

[0049] In an embodiment of this embodiment, please refer to Figure 3 and Figure 4 The upper die assembly 10 comprises an upper die plate 11, and the male die 12 is detachably mounted on the upper die plate 11.

[0050] Specifically, the upper die plate 11 and the punch 12 are both provided with pin holes (not numbered), and the upper die plate 11 and the punch 12 are connected through a pin (not shown). It can be understood that the punch 12 is connected to the upper die plate 11 through the pin, so that the punch 12 can be detached from the upper die plate 11. The punch 12 may be worn during use, and the detachable form of the punch 12 enables the punch 12 to be replaced, which is conducive to reducing the maintenance cost of the die 100.

[0051] In an embodiment of this embodiment, please refer to Figure 4 and Figure 6 , Figure 6 is Figure 4 the structure diagram of the punch 12 and the workpiece 41. The punch 12 is provided with an adsorption structure 121, which is used to adsorb the workpiece 41.

[0052] Specifically, the punch 12 is provided with a profiling structure (not numbered) matched with the shape of the workpiece 41, the profiling structure can be connected with the workpiece 41, and the adsorption structure 121 is a gas hole provided on the profiling structure.

[0053] It can be understood that the gas hole can be connected with a gas extraction device (not shown), and when the profiling structure is connected with the workpiece 41, the gas extraction device can extract gas from the gas hole to generate negative pressure in the gas hole, so that the gas hole can adsorb the workpiece 41. The gas hole can cooperate with the profiling structure to move the workpiece 41 out of the cavity 22 when the die 100 is opened, which is conducive to improving the production efficiency.

[0054] In an embodiment of this embodiment, please refer to Figure 4 , Figure 5 and Figure 6 , the punch 12 and the concave die 21 are both provided with a trimming structure 31, and a plane perpendicular to the opening and closing direction is defined as a projection plane. The projection of the trimming structure 31 on the projection plane surrounds the projection of the cavity 22 on the projection plane, and the trimming structure 31 is used to cut the workpiece 41 along the path around the cavity 22.

[0055] Specifically, the trimming structure 31 on the concave die 21 and the trimming structure 31 on the punch 12 are matched in shape and size, and during the closing process, the trimming structure 31 on the concave die 21 and the trimming structure 31 on the punch 12 are close to each other and cooperate to generate a shearing force on the part of the workpiece 41 between the trimming structure 31 on the concave die 21 and the trimming structure 31 on the punch 12, thereby cutting the workpiece 41.

[0056] It can be understood that in some cases, the edge part of the workpiece 41 needs to be cut off, and the trimming structure 31 is conducive to realizing the cutting of the edge part of the workpiece 41, thereby enabling the die 100 to have stronger applicability.

[0057] In an embodiment of this embodiment, please refer toFigure 4 and Figure 5 The trimming structure 31 on the concave die 21 is detachable.

[0058] Specifically, the limiting plate 24 has a step, and the step forms the trimming structure 31. The limiting plate 24 is detachably connected with the lower die plate 23.

[0059] It can be understood that the trimming structure 31 may be worn in the production process. The trimming structure 31 is arranged in a detachable form, which is beneficial to replacement of the trimming structure 31, thereby being beneficial to reduction of maintenance cost of the punch 100.

[0060] The embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range possessed by the ordinary skilled in the art without departing from the purpose of the utility model. In addition, the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

Claims

1. A die, characterized in that, The utility model relates to a die set, comprising: An upper die assembly comprising a male die; A lower die assembly disposed on a bottom side of the upper die assembly, the lower die assembly comprising a female die, a top plate and a resilient member, the female die having a cavity opposite to the male die, the top plate movably disposed in the cavity and configured to support a workpiece, the resilient member disposed in the cavity and abutting against the top plate, the resilient member applying an elastic force to the top plate towards the male die, the female die having a limiting portion abutting against the top plate to limit the top plate from moving away from the cavity.

2. The die of claim 1, wherein, The female die comprises a lower die plate and a limiting plate, the lower die plate having the cavity, the limiting plate disposed on a top side of the lower die plate and extending at least partially to a top side of the cavity to form the limiting portion.

3. The die of claim 2, wherein, The limiting portion is annular corresponding to an opening of the cavity.

4. The die of claim 2 wherein, The lower die plate comprises a bottom plate and an intermediate plate, one side of the intermediate plate connected to the limiting plate, the other side of the intermediate plate connected to the bottom plate through a buffer member.

5. The die of claim 1 wherein, The number of the male dies and the cavities is plural and one-to-one corresponding.

6. The die of claim 5, wherein, An installation hole is formed in the cavity, and the resilient member is installed in the installation hole.

7. The die of claim 5 wherein, The upper die assembly comprises an upper die plate, and the plural male dies are detachably installed on the upper die plate.

8. The die of claim 1 wherein, The male die is provided with an adsorption structure for adsorbing the workpiece.

9. The die of claim 1 wherein, The male die and the female die are both provided with a trimming structure, a plane perpendicular to a die opening direction is defined as a projection plane, a projection of the trimming structure on the projection plane surrounds a projection of the cavity on the projection plane, and the trimming structure is configured to cut the workpiece along a path surrounding the cavity.

10. The die of claim 9, wherein, The trimming structure on the female die is detachable.

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