CN219466375U - Improved sheet punching system - Google Patents
Improved sheet punching system Download PDFInfo
- Publication number
- CN219466375U CN219466375U CN202320561303.5U CN202320561303U CN219466375U CN 219466375 U CN219466375 U CN 219466375U CN 202320561303 U CN202320561303 U CN 202320561303U CN 219466375 U CN219466375 U CN 219466375U
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- fixedly connected
- roller
- sheet
- driving unit
- end housing
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- 238000004080 punching Methods 0.000 title claims abstract description 43
- 230000007246 mechanism Effects 0.000 claims abstract description 53
- 239000000463 material Substances 0.000 claims abstract description 25
- 238000000576 coating method Methods 0.000 claims abstract description 17
- 239000011248 coating agent Substances 0.000 claims abstract description 15
- 238000004804 winding Methods 0.000 claims description 18
- 238000007599 discharging Methods 0.000 claims description 11
- 238000005096 rolling process Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 4
- 238000005253 cladding Methods 0.000 abstract description 2
- 238000003825 pressing Methods 0.000 description 9
- 239000002699 waste material Substances 0.000 description 6
- 238000005520 cutting process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
The utility model relates to the technical field of sheet punching, and discloses an improved sheet punching system, which comprises: the punching assembly comprises a support frame, a lower die mechanism arranged at the top of the support frame, a support arranged at the top of the support frame, a first driving unit fixedly connected to the support, and an upper die mechanism fixedly connected to the output end at the bottom of the first driving unit; the sheet material cladding and feeding assembly comprises a front end housing of a U-shaped structure fixedly connected with a supporting frame and a feeding roller which is movably sleeved on the front end housing in sequence. The utility model realizes the positioning conveying, compacting and coating, continuous punching and blanking operations of sheet blanks for sheet processing, coats the upper film and the lower film on the outer side of the sheet, effectively avoids friction damage of the sheet in the conveying and processing process, protects the safety of the sheet, realizes the continuous punching operation of the sheet, changes the problems of low efficiency and high labor intensity of the traditional single feeding punching processing, improves the processing efficiency and consistency of the sheet, saves the cost and improves the benefit.
Description
Technical Field
The utility model relates to the technical field of sheet punching, in particular to an improved sheet punching system.
Background
In the die cutting and forming in the backlight industry, the price of a product gradually slides down, the continuous rising of labor wages is followed, the continuous acceleration of the market rhythm of the backlight is followed, and the like, and the material cost of the product is already reduced to an extremely low value, so that the material cost is reduced, the labor cost is reduced to meet the profit value of the product, which is a necessary condition in the current die cutting industry, in the process of punching the sheet, the sheet material is punched and formed by using a die in a single punching mode, the existing punching equipment has low punching efficiency and high labor intensity in the production process, and is inconvenient for collecting the sheet and waste, so that the improved sheet punching system is provided.
Disclosure of Invention
The utility model provides an improved sheet punching system, which aims to solve the technical problems that the existing punching equipment has low punching efficiency and high labor intensity in the production process and is inconvenient for collecting sheets and waste materials.
The utility model is realized by adopting the following technical scheme: an improved sheet blanking system comprising:
the punching assembly comprises a support frame, a lower die mechanism arranged at the top of the support frame, a support arranged at the top of the support frame, a first driving unit fixedly connected to the support, and an upper die mechanism fixedly connected to the output end at the bottom of the first driving unit;
the sheet material coating and feeding assembly comprises a front end housing of a U-shaped structure fixedly connected with a supporting frame, a feeding roller sequentially movably sleeved on the front end housing, a material taking mechanism arranged at the front end of the feeding roller and fixedly connected with the front end housing, a positioning and discharging mechanism arranged at the bottom of the material taking mechanism and fixedly connected with the front end housing, two groups of driving press rollers arranged at the tail end of the feeding roller and movably sleeved with the front end housing, a material rolling roller movably sleeved with the front end housing and a positioning mechanism arranged at two sides of the top of the feeding roller and fixedly connected with the front end housing are respectively arranged at one side, far away from each other, of the two groups of driving press rollers;
the blanking winding assembly comprises a rear end housing fixedly connected with the support frame, a blanking roller sequentially movably sleeved on the rear end housing, a guide roller and a winding roller, wherein the guide roller and the winding roller are arranged at the top of the blanking roller and movably sleeved with the rear end housing.
Through the technical scheme, the sheet blank to be punched is placed in the positioning and discharging mechanism to be positioned, the positioned sheet blank is sucked by the material taking mechanism and placed on the material feeding roller, then the material feeding roller pushes the sheet blank to the position between the two groups of driving pressing rollers to carry out coating operation, meanwhile, the upper film and the lower film for coating are sleeved on the opposite material rolling roller, the upper film and the lower film press the sheet blank in the upper film and the lower film under the pressing of the two groups of driving pressing rollers when the coating is pressed, the pressed sheet blank is conveyed to the punching assembly to be punched, the punching assembly continuously punches the conveyed sheet blank, and meanwhile, the punched waste is wound by the wind-up roller.
As a further improvement of the scheme, the lower die mechanism comprises a base, a lower die, a forming groove, a stretching channel, a supporting plate, a sucking disc, a connecting rod, a driving unit II, a driving unit eighth and a driving unit III, wherein the base is fixedly connected to the U-shaped structure at the top of the supporting frame, the lower die is sleeved on the inner side wall of the base in a sliding manner, the forming groove is formed at the top of the lower die, the stretching channel is arranged at the bottom of the forming groove and penetrates through the lower die, the supporting plate is arranged inside the forming groove, the sucking disc is fixedly connected to the top of the supporting plate, the connecting rod is fixedly connected to the bottom of the supporting plate, the driving unit II is fixedly connected to the inner side wall of the bottom of the base, the driving unit III is fixedly connected to the output end of the top of the driving unit II and fixedly connected to one end of the connecting rod stretching out of the stretching channel.
Through the technical scheme, the punching operation of the sheet is realized, the punched sheet is separated from waste materials, and blanking and conveying are carried out on the punched sheet.
As a further improvement of the scheme, the upper die mechanism comprises an upper die mounting plate fixedly connected with the output end at the bottom of the driving unit and a punching upper die fixedly connected with the bottom of the upper die mounting plate.
As a further improvement of the scheme, the positioning mechanism comprises a driving unit IV fixedly connected with the front end cover shell, a transverse plate fixedly connected at the four output ends of the driving unit, a guide plate fixedly connected at the bottom of the front end of the transverse plate in an inclined mode, and a guide roller arranged at one side of the rear end of the guide plate along the length direction of the transverse plate, wherein the guide roller is movably sleeved with the transverse plate.
Through the technical scheme, the sheet blank is positioned in the conveying process, so that the sheet blank in the coating process is accurate in position, and the sheet blank in the coating process is prevented from shifting.
As a further improvement of the scheme, the material taking mechanism comprises a driving unit five fixedly connected with the front end cover shell, a driving unit six fixedly connected with the output end at the bottom of the driving unit five, a mounting plate fixedly connected with the output end at the bottom of the driving unit six, and a sucker two fixedly connected with the bottom of the mounting plate.
Through the technical scheme, the positioned sheet blank is conveyed to the position of the feeding roller, so that the conveying operation of the sheet blank is realized.
As a further improvement of the scheme, the positioning and discharging mechanism comprises a bearing plate fixedly connected with the front end cover shell, a push rod movably sleeved on the bearing plate, a rotary drum sleeved on one end of the bottom of the bearing plate by threads, a fixing frame movably sleeved on the outer ring of the bottom of the rotary drum and fixedly connected with the bottom of the bearing plate, a motor fixedly connected at the bottom of the fixing frame and connected with the bottom of the rotary drum, a placing plate arranged at the top of the bearing plate and fixedly connected with the top of the push rod, guide rods fixedly connected at the bottom of the placing plate and movably sleeved with the bearing plate, four groups of clamping plates distributed outside the side edges of the placing plate and slidingly sleeved with the top of the bearing plate, four groups of clamping plate arrays distributed outside the placing plate, a driving unit seven fixedly connected with the top of the bearing plate is fixedly connected with one side of the clamping plate, and a clamping rod arranged along the length direction of the clamping plate is fixedly connected with the top of the clamping plate.
Through the technical scheme, batch placement, positioning and jacking operation of the sheet blanks are realized, and the sheet blanks are conveniently positioned and conveyed.
As a further improvement of the scheme, the motor II is arranged at one end of the blanking roller and the winding roller, which extend out of the rear end housing, and at one end of the driving press roller and the winding roller, which extend out of the front end housing.
Compared with the prior art, the utility model has the beneficial effects that:
1. the utility model realizes the operations of positioning conveying, compacting and coating, continuous punching and blanking of sheet blanks in sheet processing, coats the upper and lower films on the outer sides of the sheets, effectively avoids friction damage of the sheets in the conveying and processing process, and protects the safety of the sheets.
2. The continuous punching operation of the sheet is realized, the problems of low processing efficiency and high labor intensity of the traditional single feeding punching are solved, the processing efficiency and consistency of the sheet are improved, the cost is saved, and the benefit is improved.
Drawings
FIG. 1 is a schematic view of an improved sheet die cutting system according to the present utility model;
FIG. 2 is a cross-sectional view of a lower die mechanism provided by the present utility model;
FIG. 3 is a schematic diagram of the lower die mechanism according to the present utility model;
fig. 4 is a schematic structural diagram of a positioning mechanism provided by the present utility model.
Main symbol description:
1 punching component, 2 blanking and winding component, 3 sheet material coating and feeding component, 11 supporting frame, 12 lower die mechanism, 13 supporting frame, 14 upper die mechanism, 21 rear end housing, 22 blanking roller, 23 guiding roller, 24 winding roller, 31 front end housing, 32 driving press roller, 33 coiling roller, 34 feeding roller, 35 positioning mechanism, 36 material taking mechanism, 37 positioning and discharging mechanism, 41 base, 42 lower die, 43 forming groove, 44 deep channel, 45 connecting rod, 46 supporting plate, 47 sucker, 48 driving unit two, 49 driving unit three, 51 transverse plate, 52 guiding plate and 53 guiding roller.
Detailed Description
The present utility model will be further described with reference to the accompanying drawings and detailed description, wherein it is to be understood that, on the premise of no conflict, the following embodiments or technical features may be arbitrarily combined to form new embodiments.
Example 1:
referring to fig. 1-4, an improved sheet punching system of the present embodiment includes:
the punching assembly 1 comprises a supporting frame 11, a lower die mechanism 12 arranged at the top of the supporting frame 11, a bracket 13 arranged at the top of the supporting frame 11, a first driving unit fixedly connected to the bracket 13 and an upper die mechanism 14 fixedly connected to the output end at the bottom of the first driving unit;
the sheet cladding and feeding assembly 3 comprises a front end housing 31 with a U-shaped structure fixedly connected with a supporting frame 11, a feeding roller 34 sequentially movably sleeved on the front end housing 31, a material taking mechanism 36 arranged at the front end of the feeding roller 34 and fixedly connected with the front end housing 31, a positioning and discharging mechanism 37 arranged at the bottom of the material taking mechanism 36 and fixedly connected with the front end housing 31, two groups of driving press rollers 32 arranged at the tail end of the feeding roller 34 and movably sleeved with the front end housing 31, a coil roller 33 movably sleeved with the front end housing 31 and positioning mechanisms 35 arranged at two sides of the top of the feeding roller 34 and fixedly connected with the front end housing 31 are respectively arranged at one sides of the two groups of driving press rollers 32 far away from each other;
the blanking winding component 2 comprises a rear end housing 21 fixedly connected with the support frame 11, a blanking roller 22 movably sleeved on the rear end housing 21 in sequence, a guide roller 23 and a winding roller 24 which are arranged at the top of the blanking roller 22 and movably sleeved with the rear end housing 21.
The implementation principle of the improved sheet punching system in the embodiment of the application is as follows: the sheet blank to be punched is placed in a positioning and discharging mechanism 37 for positioning, the positioned sheet blank is sucked by a material taking mechanism 36 and placed on a feeding roller 34, then the feeding roller 34 pushes the sheet blank to a position between two groups of driving pressing rollers 32 for coating operation, meanwhile, an upper film and a lower film for coating are sleeved on a pair of winding rollers 33, the upper film and the lower film press the sheet blank in the upper film and the lower film under the pressing of the two groups of driving pressing rollers 32 when the coating is pressed, the pressed sheet blank is conveyed to a punching assembly 1 forward for punching operation, the punching assembly 1 continuously punches the conveyed sheet blank, and meanwhile, the punched waste is wound by a winding roller 24.
Example 2:
the further improvement of this embodiment on the basis of embodiment 1 is that: the lower die mechanism 12 comprises a base 41 fixedly connected to the top of the support frame 11, a lower die 42 sleeved on the inner side wall of the base 41 in a sliding manner, a forming groove 43 formed at the top of the lower die 42, an extending channel 44 arranged at the bottom of the forming groove 43 and penetrating through the lower die 42, a supporting plate 46 arranged inside the forming groove 43, a sucking disc 47 fixedly connected to the top of the supporting plate 46, a connecting rod 45 fixedly connected to the bottom of the supporting plate 46, a second driving unit 48 fixedly connected to the inner side wall of the bottom of the base 41, a eighth driving unit fixedly connected to the output end of the second driving unit 48 and fixedly connected with one end of the connecting rod 45 extending from the extending channel 44, and a third driving unit 49 fixedly connected to the bottom of the lower die 42 and fixedly connected with the base 41;
the upper die mechanism 14 comprises an upper die mounting plate fixedly connected with the output end at the bottom of the driving unit and a punching upper die fixedly connected with the bottom of the upper die mounting plate;
the positioning mechanism 35 comprises a driving unit IV fixedly connected with the front end cover shell 31, a transverse plate 51 fixedly connected to the output end of the driving unit IV, a guide plate 52 fixedly connected to the bottom of the front end of the transverse plate 51 in an inclined manner, and a guide roller 53 arranged at one side of the rear end of the guide plate 52 along the length direction of the transverse plate 51, wherein the guide roller 53 is movably sleeved with the transverse plate 51;
the material taking mechanism 36 comprises a driving unit five fixedly connected with the front end cover shell 31, a driving unit six fixedly connected with the output end of the bottom of the driving unit five, a mounting plate fixedly connected with the output end of the bottom of the driving unit six, and a sucking disc two fixedly connected with the bottom of the mounting plate;
the positioning and discharging mechanism 37 comprises a bearing plate fixedly connected with the front end cover shell 31, a push rod movably sleeved on the bearing plate, a rotary drum sleeved on one end of the push rod extending out of the bottom of the bearing plate in a threaded manner, a fixing frame of a U-shaped structure movably sleeved on the outer ring of the bottom of the rotary drum and fixedly connected with the bottom of the bearing plate, a motor fixedly connected at the bottom of the fixing frame and connected with the bottom of the rotary drum, a placing plate arranged at the top of the bearing plate and fixedly connected with the top of the push rod, guide rods fixedly connected at the bottom of the placing plate and movably sleeved with the bearing plate, four groups of clamping plates distributed at the outer sides of the side edges of the placing plate and slidingly sleeved with the top of the bearing plate, four groups of clamping plates distributed at the outer sides of the placing plate, one side of the clamping plates far away from the placing plate and fixedly connected with a driving unit seven fixedly connected with the top of the bearing plate, and the top of the clamping plates fixedly connected with clamping rods arranged along the length direction of the clamping plates;
the second motor is installed at the end of the blanking roller 22 and the winding roller 24 extending out of the rear end housing 21 and at the end of the driving press roller 32 and the end of the winding roller 33 extending out of the front end housing 31.
Example 3:
this embodiment differs from embodiment 1 in that: the first driving unit adopts the pneumatic cylinder, the second driving unit 48 adopts the straight line module with the fifth driving unit, the third driving unit 49, the fourth driving unit, the sixth driving unit, the seventh driving unit and the eighth driving unit all adopt the push rod motor, the control box is installed to one side of support frame 11, the controller of setting in the control box inside, the data interface of setting in control box one side, power source, display screen and switch, the controller is connected with motor one, motor two, push rod motor, straight line module, data interface, power source, display screen and switch, the controller adopts ARM singlechip.
Working principle:
the sheet blank to be punched is placed in a positioning and discharging mechanism 37 for positioning, the positioned sheet blank is sucked by a material taking mechanism 36 and placed on a feeding roller 34, then the feeding roller 34 pushes the sheet blank to a position between two groups of driving pressing rollers 32 for coating operation, meanwhile, an upper film and a lower film for coating are sleeved on a pair of winding rollers 33, the upper film and the lower film press the sheet blank in the upper film and the lower film under the pressing of the two groups of driving pressing rollers 32 when the coating is pressed, the pressed sheet blank is conveyed to a punching assembly 1 forward for punching operation, the punching assembly 1 continuously punches the conveyed sheet blank, and meanwhile, the punched waste is wound by a winding roller 24.
When the sheet blank is positioned, a driving unit seven positioned on the positioning and discharging mechanism 37 is started, the clamping plate moves to one side of the placing plate, positioning and clamping are carried out from four side edges of the sheet, the motor is started to enable the rotary cylinder to rotate, then the push rod moves upwards, so that the sheet blank on the placing plate moves upwards to be convenient to absorb;
the driving unit five and the driving unit six on the material taking mechanism 36 are started to absorb the sheet blank at the top of the displacement placing plate and place the sheet blank at the top of the loading roller 34, and meanwhile, the guide plates 52 on the two groups of positioning mechanisms 35 guide and position the sheet blank;
during punching, sheet blanks with upper films and lower films are conveyed to the top of a lower die 42 on the top of a base 41, a driving unit I on an upper die mechanism 14 is started, the upper die moves downwards to be punched with the lower die 42, at the moment, punched sheets drop downwards to the top of a sucker 47 on the lower die 42 and are adsorbed by the sucker 47, then the upper die moves upwards under the driving of the driving unit I, a driving unit III 49 at the bottom of the lower die 42 moves downwards, and then a driving unit II 48 and a driving unit eighth start to convey adsorbed sheets to the top of a blanking roller 22, so that the coating, punching and blanking operations of the sheets are completed.
The above embodiments are only preferred embodiments of the present utility model, and the scope of the present utility model is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present utility model are intended to be within the scope of the present utility model as claimed.
Claims (7)
1. An improved sheet blanking system, comprising:
the punching assembly comprises a support frame, a lower die mechanism arranged at the top of the support frame, a support arranged at the top of the support frame, a first driving unit fixedly connected to the support, and an upper die mechanism fixedly connected to the output end at the bottom of the first driving unit;
the sheet material coating and feeding assembly comprises a front end housing of a U-shaped structure fixedly connected with a supporting frame, a feeding roller sequentially movably sleeved on the front end housing, a material taking mechanism arranged at the front end of the feeding roller and fixedly connected with the front end housing, a positioning and discharging mechanism arranged at the bottom of the material taking mechanism and fixedly connected with the front end housing, two groups of driving press rollers arranged at the tail end of the feeding roller and movably sleeved with the front end housing, a material rolling roller movably sleeved with the front end housing and a positioning mechanism arranged at two sides of the top of the feeding roller and fixedly connected with the front end housing are respectively arranged at one side, far away from each other, of the two groups of driving press rollers;
the blanking winding assembly comprises a rear end housing fixedly connected with the support frame, a blanking roller sequentially movably sleeved on the rear end housing, a guide roller and a winding roller, wherein the guide roller and the winding roller are arranged at the top of the blanking roller and movably sleeved with the rear end housing.
2. The improved sheet punching system as claimed in claim 1, wherein the lower die mechanism includes a base of a U-shaped structure fixedly connected to the top of the support frame, a lower die slidably fitted on an inner side wall of the base, a forming groove provided at the top of the lower die, a protruding passage provided at the bottom of the forming groove and penetrating the lower die, a pallet provided inside the forming groove, a suction cup fixedly connected to the top of the pallet, a connecting rod fixedly connected to the bottom of the pallet, a second driving unit fixedly connected to an inner side wall of the bottom of the base, a second driving unit fixedly connected to an output end of the second driving unit and fixedly connected to one end of the connecting rod protruding from the protruding passage, and a third driving unit fixedly connected to the bottom of the lower die and fixedly connected to the base.
3. An improved sheet blanking system as in claim 1 wherein said upper die mechanism includes an upper die mounting plate fixedly connected to a bottom output of the drive unit, and a blanking upper die fixedly connected to the bottom of the upper die mounting plate.
4. The improved sheet punching system of claim 1, wherein the positioning mechanism comprises a fourth driving unit fixedly connected with the front end cover, a cross plate fixedly connected with the output end of the fourth driving unit, a guide plate fixedly connected with the bottom of the front end of the cross plate and obliquely arranged, a guide roller arranged at the rear end of the guide plate along one side of the length direction of the cross plate, and the guide roller is movably sleeved with the cross plate.
5. An improved sheet blanking system as defined in claim 1 wherein, said take-off mechanism includes a fifth drive unit fixedly connected to the front end housing, a sixth drive unit fixedly connected to the output end of the fifth drive unit, a mounting plate fixedly connected to the output end of the sixth drive unit, and a second suction cup fixedly connected to the bottom of the mounting plate.
6. The improved sheet punching system as claimed in claim 1, wherein the positioning and discharging mechanism comprises a carrier plate fixedly connected with the front end cover shell, a push rod movably sleeved on the carrier plate, a rotary drum screwed on one end of the push rod extending out of the bottom of the carrier plate, a fixing frame movably sleeved on the outer ring of the bottom of the rotary drum and fixedly connected with the bottom of the carrier plate, a motor fixedly connected with the bottom of the rotary drum, a placing plate arranged at the top of the carrier plate and fixedly connected with the top of the push rod, guide rods fixedly connected at the bottom of the placing plate and movably sleeved with the carrier plate, four groups of clamping plates distributed outside the side edges of the placing plate and slidingly sleeved with the top of the carrier plate, a driving unit seven fixedly connected with the top of the carrier plate is fixedly connected on one side of the clamping plates far away from the placing plate, and a clamping rod arranged along the length direction of the clamping plates is fixedly connected with the top of the clamping plates.
7. An improved sheet blanking system as claimed in claim 1 wherein the two motors are mounted at the end of the blanking roller and the wind-up roller extending out of the rear end housing and at the end of the driving roller and the wind-up roller extending out of the front end housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320561303.5U CN219466375U (en) | 2023-03-21 | 2023-03-21 | Improved sheet punching system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320561303.5U CN219466375U (en) | 2023-03-21 | 2023-03-21 | Improved sheet punching system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219466375U true CN219466375U (en) | 2023-08-04 |
Family
ID=87460332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320561303.5U Active CN219466375U (en) | 2023-03-21 | 2023-03-21 | Improved sheet punching system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219466375U (en) |
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2023
- 2023-03-21 CN CN202320561303.5U patent/CN219466375U/en active Active
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