A shoe upper punching device

Abstract

The present invention relates to a shoe upper blanking device. A mold assembly is provided on the top surface of a placement plate, and a lifting assembly is provided between the placement plate and the mold assembly. The mold assembly includes a limit frame and a cutting die. The first frame is in a "U" shape. The front end of the second frame is slidably connected to the front inner side surface of the first frame through a sliding assembly. Both ends of the third frame are detachably connected to the first frame and the second frame respectively through a connecting assembly. The third frame includes a plurality of rod bodies, and the plurality of rod bodies are detachably connected to each other through a connecting assembly. The cutting die includes a front arc portion, a connecting portion, and a rear arc portion. The rear arc portion and the front arc portion are fixedly connected through the connecting portion to form a sealing structure. A plurality of pairs of cutting dies are arranged in the limit frame in contact with each other, and the cutting dies at both side ends are in contact with the first frame and the second frame respectively. The mold assembly can be assembled according to the shoe upper material for blanking work, which not only reduces the alignment time but also improves the utilization rate of the shoe upper material.

Description

Technical Field

[0001] The present invention relates to the technical field of blanking equipment, and particularly to a blanking equipment for shoe uppers. Background Art

[0002] The blanking equipment for shoe uppers generally refers to the blanking machine used for processing shoe upper materials, which is mainly used for cutting large pieces of shoe upper materials (such as leather, fabric, synthetic materials, etc.) into parts that meet the design requirements of shoe uppers according to specific shapes and sizes. The blanking equipment for shoe uppers plays a very important role in the early processes of the shoe manufacturing industry.

[0003] The common blanking equipment for shoe uppers on the market mainly uses mechanical blanking, and cuts the shoe upper materials through the upper pressure plate and the mold. Although this equipment improves the speed of shoe upper processing to a certain extent, the equipment has poor adaptability, is prone to material waste, and requires manual taking of the mold for alignment every time of blanking, resulting in insufficient precision of shoe upper cutting, low material utilization rate in the processing process, and high scrap rate, further increasing the production cost. Summary of the Invention

[0004] In view of the deficiencies of the above problems, the present invention provides a blanking equipment for shoe uppers.

[0005] The present invention achieves the above object through the following technical solutions: A blanking equipment for shoe uppers, comprising an operation table, a pressure-driven pressure plate arranged above the operation table, and a placement plate arranged on the upper surface of the operation table. The placement plate is slidably connected to the upper surface of the operation table. A mold assembly is arranged on the top surface of the placement plate. A lifting assembly is arranged between the placement plate and the mold assembly. The mold assembly is arranged on the top surface of the placement plate in a liftable manner through the lifting assembly. The mold assembly includes a limiting frame and a cutting die;

[0006] The limiting frame includes a first frame body, a second frame body, and a third frame body. The first frame body is in a "U" shape. The front end of the second frame body is slidably connected to the front inner side surface of the first frame body through a sliding assembly. Both ends of the third frame body are detachably connected to one end of the rear side of the first frame body and the rear end of the second frame body respectively through a connecting assembly. The third frame body includes a plurality of rod bodies, and the plurality of rod bodies are detachably connected to each other through a connecting assembly;

[0007] The cutting die includes an integrally formed front arc portion, a connecting portion, and a rear arc portion. The rear arc portion is located at the rear end of the front arc portion, and the rear arc portion and the front arc portion are fixedly connected through the connecting portion to form a sealed structure. The cutting die is matched with the wedge surface shape;

[0008] A pair of the cutting dies are symmetrically arranged in the limit frame, and the outer ends of the front arc-shaped portions of the pair of the cutting dies are detachably slidably connected to the front inner side surface of the first frame body and the inner side surface of the third frame body through sliding components. Several pairs of the cutting dies are arranged in abutment with each other in the limit frame, and the outer side surfaces of the front arc-shaped portions of the cutting dies at both side ends are respectively abutted with the inner side surface of one side of the first frame body and the inner side surface of the second frame body.

[0009] Preferably, the connecting assembly includes a first connecting block, a second connecting block, a first positioning column, a second positioning column and a plug-in assembly, one end of the rod body and one end on the rear side of the first frame are fixedly connected to the first positioning column, the outer side of the first positioning column is fixedly connected to the second positioning column, and the radius of the second positioning column is larger than the radius of the first positioning column, and the upper and lower ends of the outer side surface of the second positioning column are provided with limiting grooves that penetrate the second positioning column, and the other end of the rod body is rotatably connected to the first connecting block through a rotating shaft, and the first connecting block is provided with a first accommodating groove on the side away from the rod body, and the rear end of the side of the second frame close to the inside of the first frame is provided with a connecting groove, and the bottom surface of the connecting groove is rotated by The shaft is rotatably connected to the second connecting block, and a second accommodating groove is opened on the side of the second connecting block close to the inside of the first frame body. The first accommodating groove and the second accommodating groove are both provided with a plug-in component, and the plug-in component includes a limit plate and a positioning block, and the limit plates are fixedly connected to the inner side surfaces on the left and right sides of the first accommodating groove and the second accommodating groove respectively, and the outer ends of the opposite sides of the two limit plates are fixedly connected to the positioning blocks, and the positioning blocks can be inserted into the limit grooves, and the distance between the two limit plates in the first accommodating groove and the distance between the two limit plates in the second accommodating groove are consistent with the diameter of the second positioning column, and the side surfaces of the limit plates are slidably connected to the outer side surfaces of the second positioning column.

[0010] Preferably, the difference between the length of the limiting plate and the length of the positioning block is consistent with the length of the second positioning column, and the length of the positioning block is consistent with the length of the first positioning column.

[0011] Preferably, the second positioning column is close to the side of the first positioning column, and a circular rubber ring is arranged on the outside of the first positioning column, and the thickness of the circular rubber ring gradually increases from the upper and lower ends to the middle.

[0012] Preferably, the sum of the lengths of the rod body and the first connecting block is consistent with the width of the front arc-shaped portion of the cutting die.

[0013] Preferably, the sliding assembly includes a first slider, a second slider, a sliding groove and a through hole, the front inner side surface of the first frame body and the inner side surface of the rod body are both provided with sliding grooves, the sliding grooves run through both ends of the rod body, the first slider and the second slider are slidably connected to the sliding grooves, one end of the second frame body is fixedly connected to the first slider, the outer end portions of the front arc-shaped portions of the cutting die are fixedly connected to the second sliders, a through hole is provided on the top surface of one side of the front end of the first frame body, and the through hole is connected to the sliding groove on the front inner side surface of the first frame body, and the second slider can be detachably connected to the sliding groove through the through hole.

[0014] Preferably, the lifting assembly includes a support plate and two layers of identical and relatively arranged scissor-type telescopic folding mechanisms, both side surfaces of the first frame are fixedly connected to the support plate, first supporting grooves are provided on both sides of the top surface of the placement plate and directly below the support plate, each layer of the scissor-type telescopic folding mechanism includes a plurality of groups of cross-folding sheet groups connected in sequence in vertical directions, each group of cross-folding sheet groups includes two folding sheets that are cross-arranged and hinged in the middle through a first rotating shaft, in two adjacent groups of cross-folding sheet groups, the second ends of the two folding sheets of the upper group of cross-folding sheet groups are hinged to the first ends of the two folding sheets of the lower group of cross-folding sheet groups through a second rotating shaft in a one-to-one correspondence, and in the two layers of the scissor-type telescopic folding mechanisms, the second rotating shaft in one layer of the scissor-type telescopic folding mechanism is hinged to the second rotating shaft in the other layer The second rotating shafts in the scissors-type telescopic folding mechanism are fixedly connected one by one through the first connecting column. The two first ends on the same side of the two folding plates in the first group of the cross-folding plate group of each layer of the scissors-type telescopic folding mechanism are hinged to the bottom surface of the second supporting groove opened on the bottom surface of the supporting plate through a hinge seat, and the two first ends on the other side are slidably connected in the second supporting groove through a hinged sliding seat and a second sliding groove opened on two inner sides of the second supporting groove. The two second ends on the same side of the two folding plates in the last group of the cross-folding plate group of each layer of the scissors-type telescopic folding mechanism are hinged to the first supporting groove opened on the top surface of the placing plate through a hinge seat, and the two second ends on the other side are slidably connected in the first supporting groove through a hinged sliding seat and a second sliding groove opened on two inner sides of the first supporting groove.

[0015] Preferably, a positioning piece is arranged between two folding pieces in the cross-folding piece group of each layer of the scissor-type telescopic folding mechanism, the positioning piece includes two supporting pieces and one end of the two supporting pieces is hinged by a third rotating shaft, and the upper and lower ends of the two supporting pieces are hinged by a fourth rotating shaft at the middle position of the left and right sides of each of the two folding pieces in the cross-folding piece group, and the third rotating shaft in one layer of the positioning pieces corresponds one-to-one with the third rotating shaft in another layer of the positioning pieces and is fixedly connected by a second connecting column.

[0016] Preferably, the cutting die also includes a connecting plate, which is arranged inside the rear arc-shaped portion, and both ends of the connecting plate pass through the rear arc-shaped portion to extend to the inside of the front arc-shaped portion, and are fixedly connected to the two inner side surfaces inside the front arc-shaped portion, and a threaded hole is opened in the middle of the top surface of the connecting plate, and the threaded hole passes through the connecting plate, and a connecting rod is threadedly connected inside the threaded hole, and the end of the connecting rod is fixedly connected with a fixing nail.

[0017] Preferably, a notch is provided on the top surface of the connecting portion of the cutting die, and the height of the notch is half of the connecting portion. The connecting portion of one cutting die after being flipped 180 degrees can be snap-fitted with the notch of the connecting portion of another cutting die to form a pair of symmetrical cutting dies.

[0018] The beneficial effects of the present invention are:

[0019] 1. By setting up the mold assembly, the mold assembly includes a limit frame and a cutting die, and a suitable mold assembly can be assembled according to the upper materials of different sizes to carry out subsequent punching work, which not only reduces the operator's positioning time, but also effectively improves the utilization rate of the upper material. Several cutting dies are spliced ​​according to the size of the upper material to make them abut against each other, and they are limited by assembling corresponding limit frames. This not only makes full use of the upper material, but also can align multiple cutting dies at one time according to the upper material, so as to quickly punch the upper; at the same time, the same batch of upper materials after punching are roughly consistent, which is not only convenient for collection but also convenient for subsequent processing.

[0020] 2. By setting a connecting plate and fixing nails, the fixing nails are detachably connected to the connecting plate through connecting rods and threaded holes. The connecting plate presses the upper material downward when the upper is punched to facilitate punching. At the same time, the fixing nails can be inserted into the upper material. When the mold assembly is lifted after the punching is completed, a part of the waste material is separated from the punched upper. This is not only convenient for collecting the punched upper, but also the separated waste material is in a fixed shape, which is convenient for collection and subsequent production. For example, it can be used to produce the lace surface in the middle of the upper. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the punching device of the present invention;

[0022] Figure 2 It is a structural schematic diagram of the placement plate and the mold assembly of the present invention;

[0023] Figure 3 It is a structural schematic diagram of the mold assembly of the present invention;

[0024] Figure 4 It is a schematic diagram of the structure of a pair of cutting dies of the present invention;

[0025] Figure 5It is a structural schematic diagram of a knife die of the present invention;

[0026] Figure 6 It is a rear view of the limiting frame of the present invention;

[0027] Figure 7 It is a schematic diagram of the working state of the connection assembly of the present invention;

[0028] Figure 8 It is a schematic diagram of the structure of the support plate and the scissor-type telescopic and folding mechanism of the present invention;

[0029] Fig. 9 It is a structural schematic diagram of the scissors-type telescopic and folding mechanism of the present invention.

[0030] In the figure: 1, operating table; 2, pressing plate; 3, placing plate; 31, first supporting groove; 311, first sliding groove; 4, mold assembly; 41, limiting frame; 411, first frame; 4111, through hole; 412, second frame; 4121, connecting groove; 413, third frame; 4131, rod body; 42, knife die; 421, front arc portion; 422, connecting portion; 4221, missing groove; 423, rear arc portion; 43, connecting plate; 44, connecting rod; 45, fixing nail; 5, connecting assembly; 51, first connecting block; 511, first accommodating groove; 52, second connecting block; 521, first Two accommodating grooves; 53, first positioning column; 54, second positioning column; 541, limiting groove; 55, plug-in assembly; 551, limiting plate; 552, positioning block; 6, sliding groove; 7, second sliding block; 8, lifting assembly; 81, supporting plate; 811, second supporting groove; 812, second sliding groove; 82, scissor-type telescopic folding mechanism; 821, cross-folding sheet group; 8211, first rotating shaft; 8212, folding sheet; 8213, second rotating shaft; 8214, first connecting column; 83, hinged seat; 84, sliding seat; 85, positioning sheet; 851, supporting sheet; 852, third rotating shaft; 86, fourth rotating shaft. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0032] like Figures 1 to 9As shown in the figure, the present invention provides a shoe upper blanking device, which includes an operating table 1, a pressure-driven pressing plate 2 arranged above the operating table 1, and a placing plate 3 arranged on the upper surface of the operating table 1. The placing plate 3 is slidably connected to the upper surface of the operating table 1. A mold assembly 4 is arranged on the top surface of the placing plate 3. The placing plate 3 can be horizontally and reciprocally slidably connected to the upper surface of the operating table 1. The placing plate 3 can slide the mold assembly 4 on its top surface under the pressing plate 2. The pressing plate 2 can vertically reciprocate up and down under pressure to apply pressure and relieve pressure on the mold assembly 4, so as to blank the shoe upper material below the mold assembly 4 through the mold assembly 4 and cut the required shoe upper from the shoe upper material. Those skilled in the art know that for the existing blanking device, each time blanking is performed, it is necessary to manually take the mold for alignment, which not only results in insufficient accuracy of shoe upper cutting, but also low material utilization rate and high waste rate during the processing process.

[0033] In this embodiment, a lifting assembly 8 is arranged between the placing plate 3 and the mold assembly 4. The mold assembly 4 is arranged on the top surface of the placing plate 3 in a liftable manner through the lifting assembly 8. The mold assembly 4 includes a limiting frame 41 and a cutting die 42.

[0034] The limiting frame 41 includes a first frame body 411, a second frame body 412 and a third frame body 413. The first frame body 411 is in a "U" shape. The front end of the second frame body 412 is slidably connected to the front inner side surface of the first frame body 411 through a sliding assembly. Both ends of the third frame body 413 are detachably connected to one end of the rear side of the first frame body 411 and the rear end of the second frame body 412 respectively through a connecting assembly 5. The third frame body 413 includes a plurality of rod bodies 4131, and the plurality of rod bodies 4131 are detachably connected to each other through a connecting assembly 5.

[0035] The cutting die 42 includes an integrally formed front arc portion 421, a connecting portion 422 and a rear arc portion 423. The rear arc portion 423 is located at the rear end of the front arc portion 421, and a sealing structure is fixedly connected between the rear arc portion 423 and the front arc portion 421 through the connecting portion 422. The cutting die 42 matches the shape of the shoe upper.

[0036] A pair of cutting dies 42 are symmetrically arranged in the limiting frame 41, and the outer ends of the front arc portions 421 of the pair of cutting dies 42 are respectively detachably slidably connected to the front inner side surface of the first frame body 411 and the inner side surface of the third frame body 413 through a sliding assembly. A plurality of pairs of cutting dies 42 are arranged in the limiting frame 41 in a mutually abutting manner, and the outer side surfaces of the front arc portions 421 of the cutting dies 42 at both ends are respectively abutted against the inner side surface of one side of the first frame body 411 and the inner side surface of the second frame body 412.

[0037] By setting up the mold assembly 4, the mold assembly 4 includes a limit frame 41 and a cutting die 42, and a suitable mold assembly 4 can be assembled according to the upper materials of different sizes to carry out subsequent punching work, which not only reduces the operator's positioning time, but also effectively improves the utilization rate of the upper material. According to the size of the upper material, several cutting dies 42 are spliced ​​to abut against each other, and they are limited by assembling corresponding limit frames 41. In this way, not only the upper material is fully utilized, but also a plurality of cutting dies 42 can be positioned at one time according to the upper material, so as to quickly punch the upper; at the same time, the same batch of upper materials after punching are roughly consistent, which is not only convenient for collection but also convenient for subsequent processing; first, according to the size of the upper material, several rods 4131 are spliced, first The cutting dies 42 are assembled one by one in the several rod bodies 4131, and then the several rod bodies 4131 are spliced ​​together through the connecting component 5 to form a third frame body 413. Correspondingly, several cutting dies 42 are also assembled on the first frame body 411, and one end of the assembled third frame body 413 is spliced ​​with one end of the first frame body 411 through the connecting component 5, so that a pair of symmetrical cutting dies 42 abut against each other. Finally, the second frame body 412 is slid and spliced ​​together with the other end of the assembled third frame body 413 through the connecting component 5, so that the several pairs of cutting dies 42 are arranged in abutment with each other in the limit frame 41, and the two ends of the several pairs of cutting dies 42 are respectively abutted against the inner side surface of the first frame body 411 and the inner side surface of the second frame body 412, so that punching can be performed.

[0038] Moreover, in the present embodiment, the connecting component 5 comprises a first connecting block 51, a second connecting block 52, a first positioning column 53, a second positioning column 54 and a plug-in component 55; one end of the rod body 4131 and one end on the rear side of the first frame body 411 are fixedly connected to the first positioning column 53; the outer side of the first positioning column 53 is fixedly connected to the second positioning column 54; and the radius of the second positioning column 54 is larger than the radius of the first positioning column 53; both upper and lower ends of the outer side surface of the second positioning column 54 are provided with limiting grooves 541 penetrating the second positioning column 54; the other end of the rod body 4131 is rotatably connected to the first connecting block 51 through a rotating shaft; a first accommodating groove 511 is provided on the side of the first connecting block 51 away from the rod body 4131; a connecting groove 4121 is provided on the rear end of the side surface of the second frame body 412 close to the inside of the first frame body 411; and the bottom surface of the connecting groove 4121 is provided with a The rotating shaft is rotatably connected to the second connecting block 52, and a second accommodating groove 521 is provided on the side of the second connecting block 52 close to the inside of the first frame body 411. The first accommodating groove 511 and the second accommodating groove 521 are both provided with a plug-in component 55, and the plug-in component 55 includes a limit plate 551 and a positioning block 552. The limit plates 551 are respectively fixedly connected to the inner side surfaces on the left and right sides of the first accommodating groove 511 and the second accommodating groove 521, and the outer ends of the opposite sides of the two limit plates 551 are fixedly connected to the positioning block 552. The positioning block 552 can be inserted into the limit groove 541. The distance between the two limit plates 551 in the first accommodating groove 511 and the distance between the two limit plates 551 in the second accommodating groove 521 are consistent with the diameter of the second positioning column 54, and the side surface of the limit plate 551 is slidably connected to the outer side surface of the second positioning column 54.

[0039] Through the provided connecting assembly 5, when it is necessary to assemble the limit frame 41, the first connecting block 51 of one of the rod bodies 4131 is rotated 90 degrees, so that the positioning block 552 in the first accommodating groove 511 opened in the first connecting block 51 is inserted into the limiting groove 541 of the second positioning column 54 of the other rod body 4131, and then the two rod bodies 4131 are pushed close to each other until they are tightly fitted, and then the first connecting block 51 is rotated 90 degrees again, so that the positioning block 552 is staggered with the limiting groove 541 of the second positioning column 54 of the other rod body 4131, and the assembly is completed; similarly, the assembly of the rod body 4131 with the first frame body 411 and the second frame body 412 is similar.

[0040] Meanwhile, in this embodiment, the difference between the length of the limiting plate 551 and the length of the positioning block 552 is consistent with the length of the second positioning column 54 , and the length of the positioning block 552 is consistent with the length of the first positioning column 53 .

[0041] The arrangement improves the tightness between the first positioning column 53 and the second positioning column 54 and the limiting plate 551 and the positioning block 552, thereby effectively preventing the front-back shaking.

[0042] Furthermore, in this embodiment, the second positioning column 54 is close to the side of the first positioning column 53 , and a circular rubber ring is disposed outside the first positioning column 53 , and the thickness of the circular rubber ring gradually increases from the upper and lower ends to the middle.

[0043] By setting the circular rubber ring, the tightness between the side of the positioning block 552 and the side of the second positioning column 54 is improved, and the thickness of the circular rubber ring gradually increases from the upper and lower ends to the middle, so that during the rotation of the first connecting block 51, the tightness between the side of the positioning block 552 and the side of the second positioning column 54 becomes higher and higher. When the first connecting block 51 is rotated to 90 degrees, the tightness between the side of the positioning block 552 and the side of the second positioning column 54 is the highest.

[0044] Furthermore, in the present embodiment, the sum of the lengths of the rod body 4131 and the first connecting block 51 is consistent with the width of the front arc-shaped portion 421 of the cutting die 42 .

[0045] The setting not only makes it easy to know how many cutting dies 42 are needed, but also makes several cutting dies 42 in the limit frame 41 abut against each other, and further makes the outer side surface of the front arc-shaped portion 421 of the cutting dies 42 at both side ends abut against the inner side surface of one side of the first frame body 411 and the inner side surface of the second frame body 412 respectively.

[0046] Furthermore, in the present embodiment, the sliding assembly comprises a first slider, a second slider 7, a slide groove 6 and a through hole 4111; the front inner side surface of the first frame body 411 and the inner side surface of the rod body 4131 are both provided with a slide groove 6, the slide groove 6 runs through both ends of the rod body 4131, the first slider and the second slider 7 are slidably connected with the slide groove 6, one end of the second frame body 412 is fixedly connected with the first slider, the outer end portion of the front arc-shaped portion 421 of the cutting die 42 is fixedly connected with the second slider 7, a through hole 4111 is provided on the top surface of one side of the front end of the first frame body 411, and the through hole 4111 is communicated with the slide groove 6 on the front inner side surface of the first frame body 411, and the second slider 7 can be detachably connected with the slide groove 6 through the through hole 4111.

[0047] The sliding assembly is provided to facilitate the left and right sliding of the cutting die 42, and also facilitate the left and right sliding of the second frame 412 according to the upper material, so as to change the size of the limit frame 41 as needed, and ensure that the several cutting dies 42 in the limit frame 41 abut against each other. The through hole 4111 is provided to facilitate the installation of the cutting die 42 into or removal from the first frame 411 through the through hole 4111. The cutting die 42 can be slid to the position of the slide groove 6 corresponding to the through hole 4111 and lifted up to remove the cutting die 42.

[0048] In addition, in the present embodiment, the lifting assembly 8 includes a support plate 81 and two layers of identical and relatively arranged scissor-type telescopic folding mechanisms 82, both side surfaces of the first frame 411 are fixedly connected to the support plate 81, and first supporting grooves 31 are provided on both sides of the top surface of the placement plate 3 and directly below the support plate 81, and each layer of the scissor-type telescopic folding mechanism 82 includes a plurality of groups of cross-folding sheet groups 821 connected in sequence in a vertical direction, and each group of cross-folding sheet groups 821 includes two folding sheets 8212 which are cross-arranged and hinged in the middle through a first rotating shaft 8211, and in two adjacent groups of cross-folding sheet groups 821, the second ends of the two folding sheets 8212 of the upper group of cross-folding sheet groups 821 are hinged to the first ends of the two folding sheets 8212 of the lower group of cross-folding sheet groups 821 through a second rotating shaft 8213 in a one-to-one correspondence, and in the two layers of the scissor-type telescopic folding mechanisms 82, the second rotating shaft 8213 in one layer of the scissor-type telescopic folding mechanisms 82 is hinged to the second rotating shaft 8213 in the other layer of the scissor-type telescopic folding mechanisms 82. The second rotating shaft 8213 in the knife-type telescopic folding mechanism 82 is fixedly connected one by one through the first connecting column 8214. The two first ends on the same side of the two folding plates 8212 in the cross-folding plate group 821 of the first group of each layer of the scissors-type telescopic folding mechanism 82 are hinged to the bottom surface of the second support groove 811 opened on the bottom surface of the support plate 81 through the hinge seat 83, and the two first ends on the other side are slidably connected in the second support groove 811 through the hinged sliding seat 84 and the second sliding groove 812 opened on the two inner sides of the second support groove 811. The two second ends on the same side of the two folding plates 8212 in the last group of the cross-folding plate group 821 of each layer of the scissors-type telescopic folding mechanism 82 are hinged to the first support groove 31 opened on the top surface of the placement plate 3 through the hinge seat 83, and the two second ends on the other side are slidably connected in the first support groove 31 through the hinged sliding seat 84 and the first sliding groove 311 opened on the two inner sides of the first support groove 31.

[0049] By setting up the lifting assembly 8, when the mold assembly 4 is used, it is convenient to support it so that the operator can adjust the upper material below. When the mold assembly 4 is punching, it can be lowered along with the lowering of the mold assembly 4. By setting up a double-layer scissor-type telescopic folding mechanism 82, and connecting columns are connected between the two layers of the telescopic folding mechanism, the connection can be firm during the stretching process and the folding process, and the force is symmetrical, uniform and stable, thereby ensuring stable support of the mold assembly 4, and smooth and stable descent.

[0050] At the same time, in the present embodiment, a positioning piece 85 is arranged between two folding pieces 8212 in the cross-folding piece group 821 of each layer of the scissor-type telescopic folding mechanism 82, the positioning piece 85 includes two supporting pieces 851 and one end of the two supporting pieces 851 is hinged by a third rotating shaft 852, and the middle position of the left and right sides of each of the two folding pieces 8212 in the cross-folding piece group 821 is hinged to the upper and lower ends of the two supporting pieces 851 by a fourth rotating shaft 86, and the third rotating shaft 852 in one layer of the positioning pieces 85 corresponds one to one with the third rotating shaft 852 in another layer of the positioning pieces 85 and is fixedly connected by a second connecting column.

[0051] By setting the positioning piece 85, the positioning piece 85 is set in the middle of the left and right sides of the cross-folded piece group 821, so as to further improve its supporting stability and strength, make it more stable and reliable, not easy to shake left and right, and be stable during the descending process, thereby enhancing the stability of the lifting component 8 under force.

[0052] In addition, in the present embodiment, the cutting die 42 also includes a connecting plate 43, which is arranged inside the rear arc-shaped portion 423, and both ends of the connecting plate 43 pass through the rear arc-shaped portion 423 and extend to the inside of the front arc-shaped portion 421, and are fixedly connected to the two inner side surfaces inside the front arc-shaped portion 421, and a threaded hole is opened in the middle of the top surface of the connecting plate 43, and the threaded hole passes through the connecting plate 43, and a connecting rod 44 is threadedly connected inside the threaded hole, and a fixing nail 45 is fixedly connected to the end of the connecting rod 44.

[0053] By setting a connecting plate 43 and a fixing nail 45, the fixing nail 45 is detachably connected to the connecting plate 43 through a connecting rod 44 and a threaded hole. The connecting plate 43 presses the upper material downward to facilitate punching when the upper is punched, and the fixing nail 45 can be inserted into the upper material. When the mold assembly 4 is lifted after the punching is completed, a part of the waste material is separated from the punched upper, which is not only convenient for collecting the punched upper, but also the separated waste material is in a fixed shape, which is convenient for collection and subsequent production. For example, it can be used to produce the lace surface in the middle of the upper.

[0054] Furthermore, in this embodiment, a notch 4221 is provided on the top surface of the connecting portion 422 of the cutting die 42, and the height of the notch 4221 is half of the connecting portion 422. After one cutting die 42 is flipped 180 degrees, the connecting portion 422 can be snap-fitted with the notch 4221 of the connecting portion 422 of another cutting die 42 to form a pair of symmetrical cutting dies 42.

[0055] By setting the notch 4221, a pair of symmetrically arranged cutting dies 42 can share a connecting portion 422, which not only improves the tightness of the two cutting dies 42, thereby improving the utilization rate of the upper material, but also can improve the service life of the cutting dies 42 to a certain extent. It is not necessary for the connecting portion 422 of each cutting die 42 to be used every time, thereby reducing loss, and it is not necessary for the connecting portion 422 of each cutting die 42 to be intact.

[0056] When in use, first, several rod bodies 4131 are spliced ​​according to the size of the upper material, and the cutting molds 42 are first assembled in the several rod bodies 4131 in a one-to-one correspondence, and the second sliding block 7 on one side of the cutting mold 42 is slidably connected with the sliding groove 6 provided on the inner side of the rod body 4131, and the first connecting block 51 of one of the rod bodies 4131 is rotated 90 degrees, so that the positioning block 552 in the first receiving groove 511 provided in the first connecting block 51 is inserted into the limiting groove 54 of the second positioning column 54 of another rod body 4131. The two rod bodies 4131 are then pushed closer to each other until they fit tightly together, and then the first connecting block 51 is rotated 90 degrees again so that the positioning block 552 is offset from the limiting groove 541 of the second positioning column 54 of the other rod body 4131, and the assembly is completed; a plurality of rod bodies 4131 are spliced ​​together through the connecting assembly 5 to form a third frame body 413, and a corresponding plurality of cutting dies 42 are also assembled on the first frame body 411, and the second slider 7 of the cutting die 42 is correspondingly placed above the through hole 4111 , press the cutting die 42 downward so that the second slider 7 passes through the through hole 4111 into the slide groove 6 of the first frame body 411, and the cutting die 42 is installed. Then, the one-to-one symmetrical pair of cutting dies 42 are turned 180 degrees to each other, and then brought close to each other so that the connecting portion 422 of one cutting die 42 can be snap-fitted with the notch 4221 of the connecting portion 422 of the other cutting die 42 to form a pair of symmetrical cutting dies 42. Similarly, assemble the two ends of the third frame body 413 with the first frame body 411 and the second frame body 412; The assembly of the mold assembly 4 is completed; the placement plate 3 is pushed, and the placement plate 3 can slide the mold assembly 4 on the top surface to the bottom of the pressure plate 2. The pressure plate 2 can apply pressure to the mold assembly 4 vertically downward through pressure driving, and the upper material is punched below the knife die 42. After the punching is completed, the placement plate 3 is pulled to the original position, and then the limit frame 41 is pulled upward to make the lifting assembly 8 support the column limit frame 41, and then the position of the lower upper material is adjusted to align with the bottom of the mold assembly 4, and then the next punching can be continued.

[0057] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A shoe upper punching device, comprising an operating table (1), a pressure plate (2) arranged above the operating table (1) and driven by pressure, and a placement plate (3) arranged on the upper surface of the operating table (1), characterized in that: The placement plate (3) is slidably connected to the upper surface of the operating table (1). A mold assembly (4) is provided on the top surface of the placement plate (3). A lifting assembly (8) is provided between the placement plate (3) and the mold assembly (4). The mold assembly (4) is arranged on the top surface of the placement plate (3) in a liftable manner through the lifting assembly (8). The mold assembly (4) includes a limit frame (41) and a cutting die (42). The limit frame (41) includes a first frame body (411), a second frame body (412) and a third frame body (413). The first frame body (411) is in a "U" shape. The front end of the second frame body (412) is slidably connected to the front inner side surface of the first frame body (411) through a sliding assembly. Both ends of the third frame body (413) are detachably connected to one end of the rear side of the first frame body (411) and the rear end of the second frame body (412) respectively through a connecting assembly (5). The third frame body (413) includes a plurality of rod bodies (4131), and the plurality of rod bodies (4131) are detachably connected to each other through a connecting assembly (5). The cutting die (42) includes an integrally formed front arc portion (421), a connecting portion (422) and a rear arc portion (423). The rear arc portion (423) is located at the rear end of the front arc portion (421), and a sealing structure is fixedly formed between the rear arc portion (423) and the front arc portion (421) through the connecting portion (422). The cutting die (42) is matched with the shape of the shoe upper. A pair of the cutting dies (42) are symmetrically arranged in the limit frame (41), and the outer ends of the front arc portions (421) of the pair of cutting dies (42) are detachably slidably connected to the front inner side surface of the first frame body (411) and the inner side surface of the third frame body (413) respectively through a sliding assembly. A plurality of pairs of the cutting dies (42) are arranged in the limit frame (41) in an abutting manner, and the outer side surfaces of the front arc portions (421) of the cutting dies (42) at both ends are abutted against the inner side surface of one side of the first frame body (411) and the inner side surface of the second frame body (412) respectively.

2. A shoe upper punching device according to claim 1, characterized in that: The connecting assembly (5) comprises a first connecting block (51), a second connecting block (52), a first positioning column (53), a second positioning column (54) and a plug-in assembly (55); one end of the rod body (4131) and one end of the rear side of the first frame body (411) are both fixedly connected to the first positioning column (53); the outer side of the first positioning column (53) is fixedly connected to the second positioning column (54); the radius of the second positioning column (54) is larger than the radius of the first positioning column (53); upper and lower ends of the outer side surface of the second positioning column (54) are both provided with limiting grooves (541) penetrating the second positioning column (54); the other end of the rod body (4131) is rotatably connected to the first connecting block (51) via a rotating shaft; a first accommodating groove (511) is provided on a side surface of the first connecting block (51) away from the rod body (4131); a connecting groove (4121) is provided on a rear end of a side surface of the second frame body (412) close to the inside of the first frame body (411); the bottom surface of the connecting groove (4121) is rotatably connected to the first connecting block (51) via a rotating shaft The second connecting block (52) is dynamically connected to the first frame body (411), and a second receiving groove (521) is provided on a side of the second connecting block (52) close to the inside of the first frame body (411). A plug-in assembly (55) is provided in each of the first receiving groove (511) and the second receiving groove (521). The plug-in assembly (55) comprises a limit plate (551) and a positioning block (552). The limit plate (551) is fixed to the inner side surfaces of the left and right sides of the first receiving groove (511) and the second receiving groove (521), respectively. The two limiting plates (551) are connected, and the outer ends of the opposite sides of the two limiting plates (551) are fixedly connected to the positioning blocks (552), and the positioning blocks (552) can be inserted into the limiting groove (541), and the distance between the two limiting plates (551) in the first receiving groove (511) and the distance between the two limiting plates (551) in the second receiving groove (521) are consistent with the diameter of the second positioning column (54), and the side surface of the limiting plate (551) is slidably connected to the outer side surface of the second positioning column (54).

3. A shoe upper punching device according to claim 2, characterized in that: The difference between the length of the limiting plate (551) and the length of the positioning block (552) is consistent with the length of the second positioning column (54), and the length of the positioning block (552) is consistent with the length of the first positioning column (53).

4. The shoe upper punching device according to claim 3, characterized in that: The second positioning column (54) is close to the side of the first positioning column (53), and a circular rubber ring is arranged outside the first positioning column (53), and the thickness of the circular rubber ring gradually increases from the upper and lower ends to the middle.

5. The shoe upper punching device according to claim 4, characterized in that: The sum of the lengths of the rod body (4131) and the first connecting block (51) is consistent with the width of the front arc-shaped portion (421) of the cutting die (42).

6. The shoe upper punching device according to claim 1, characterized in that: The sliding assembly comprises a first sliding block, a second sliding block (7), a sliding groove (6) and a through hole (4111); the front inner side surface of the first frame body (411) and the inner side surface of the rod body (4131) are both provided with a sliding groove (6); the sliding groove (6) runs through both ends of the rod body (4131); the first sliding block and the second sliding block (7) are slidably connected to the sliding groove (6); one end of the second frame body (412) is fixedly connected to the first sliding block; the outer end of the front arc-shaped portion (421) of the cutting die (42) is fixedly connected to the second sliding block (7); a through hole (4111) is provided on the top surface of one side of the front end of the first frame body (411); the through hole (4111) is communicated with the sliding groove (6) on the front inner side surface of the first frame body (411); and the second sliding block (7) can be detachably connected to the sliding groove (6) through the through hole (4111).

7. The shoe upper punching device according to claim 1, characterized in that: The lifting assembly (8) comprises a support plate (81) and two layers of identical and oppositely arranged scissor-type telescopic folding mechanisms (82); both side surfaces of the first frame (411) are fixedly connected to the support plate (81); first support grooves (31) are provided on both sides of the top surface of the placement plate (3) and directly below the support plate (81); each layer of the scissor-type telescopic folding mechanism (82) comprises a plurality of groups of cross-folding sheet groups (821) connected in sequence in a vertical direction; each group of cross-folding sheet groups (821) comprises a cross-arranged structure with a first rotating member in the middle. The invention relates to two folding sheets (8212) hingedly connected to an axis (8211), in two adjacent groups of cross-folding sheet groups (821), the second ends of the two folding sheets (8212) of the upper group of cross-folding sheet groups (821) are hingedly connected to the first ends of the two folding sheets (8212) of the lower group of cross-folding sheet groups (821) through a second rotating shaft (8213) in a one-to-one correspondence, and in the two layers of the scissor-type telescopic folding mechanism (82), the second rotating shaft (8213) of one layer of the scissor-type telescopic folding mechanism (82) is hingedly connected to the second rotating shaft (8213) of the other layer of the scissor-type telescopic folding mechanism (82). The second rotating shafts (8213) in the telescopic folding mechanism (82) are fixedly connected one by one through the first connecting column (8214), and the two first ends on the same side of the two folding plates (8212) in the first group of the cross-folding plates (821) of each layer of the scissor-type telescopic folding mechanism (82) are hinged to the bottom surface of the second support groove (811) opened on the bottom surface of the support plate (81) through the hinge seat (83), and the two first ends on the other side are hinged to the second support groove (811) opened on the two inner side surfaces of the second support groove (811) through the hinge seat (84). The sliding groove (812) is slidably connected in the second support groove (811), and the two second ends on the same side of the two folding plates (8212) in the last group of the cross-folding plate group (821) of each layer of the scissor-type telescopic folding mechanism (82) are hinged to the first support groove (31) opened on the top surface of the placement plate (3) through the hinge seat (83), and the two second ends on the other side are slidably connected to the first support groove (31) through the hinged sliding seat (84) and the second sliding grooves (812) opened on the two inner side surfaces of the first support groove (31).

8. The shoe upper punching device according to claim 7, characterized in that: A positioning piece (85) is provided between two folding pieces (8212) in the cross-folding piece group (821) of each layer of the scissor-type telescopic folding mechanism (82); the positioning piece (85) comprises two supporting pieces (851), and one end of the two supporting pieces (851) is hinged via a third rotating shaft (852); the middle positions of the left and right sides of the two folding pieces (8212) in the cross-folding piece group (821) are respectively hinged to the upper and lower ends of the two supporting pieces (851) via a fourth rotating shaft (86); the third rotating shaft (852) in one layer of the positioning piece (85) corresponds to the third rotating shaft (852) in another layer of the positioning piece (85) in a one-to-one manner and is fixedly connected via a second connecting column.

9. The shoe upper punching device according to claim 1, characterized in that: The cutting die (42) further comprises a connecting plate (43), wherein the connecting plate (43) is arranged inside the rear arc-shaped portion (423), and two ends of the connecting plate (43) pass through the rear arc-shaped portion (423) and extend to the inside of the front arc-shaped portion (421), and are fixedly connected to two inner side surfaces inside the front arc-shaped portion (421), and a threaded hole is provided in the middle of the top surface of the connecting plate (43), and the threaded hole passes through the connecting plate (43), and a connecting rod (44) is threadedly connected inside the threaded hole, and a fixing nail (45) is fixedly connected to the end of the connecting rod (44).

10. The shoe upper punching device according to claim 1, characterized in that: A notch (4221) is provided on the top surface of the connecting portion (422) of the cutting die (42), and the height of the notch (4221) is half of the connecting portion (422). The connecting portion (422) of one cutting die (42) after being turned 180 degrees can be snap-connected with the notch (4221) of the connecting portion (422) of another cutting die (42) to form a symmetrical cutting die (42).

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