Cutting device of 3D hernia repair patch with pre-press forming function

Abstract

The utility model discloses a kind of cutting equipment of 3D hernia repair patch with pre-pressing forming function, including the bottom plate of lower die plate fixed with upper end surface, lower die core is fixed in the inside of lower die core installation slot in lower die plate middle part, guide pillar is fixed with the corner of bottom plate, middle die plate and upper die plate are slidably sleeved on guide pillar, upper die core is suspendedly fixed in the inside of upper die core installation slot in middle die plate middle part, annular passage one is formed between upper die core and upper die core installation slot, annular cutter with annular cutting edge in lower end is slidably installed in the inside of annular passage one, annular cutter upper end extends to above middle die plate and is equipped with longitudinal elastic element three with middle die plate upper end surface, middle die plate and upper die plate are separated by longitudinal elastic element, mutually adaptive male die surface and female die surface are equipped between lower die core and upper die core. Integrated with pre-pressing forming and annular cutting dual function, the 3D hernia repair patch periphery of cutting is uniformly stable, and production and processing efficiency and finished product qualification rate are improved.

Description

Technical Field

[0001] This utility model relates to the field of hernia repair patch processing technology, specifically to a cutting device for a 3D hernia repair patch with pre-compression molding function. Background Technology

[0002] 3D hernia repair patches are advanced medical materials used to treat abdominal wall defects such as inguinal hernias. Their core advantage lies in their three-dimensional structural design, which allows for more precise conformation to human anatomical structures, reducing the risk of postoperative complications. With the increasing clinical use of 3D hernia repair patches, market demand is growing. Currently, the production process for 3D hernia repair patches is as follows: shaping (using a flat rectangular patch, pre-pressed using a mold to achieve the desired shape) → manual cutting (cutting along the pre-pressed edges with scissors) → heat molding. The problems with manual cutting of 3D hernia repair patches are: manual cutting is greatly affected by human factors, making it difficult to ensure that the edge allowance of the cut patch is completely consistent, thus affecting subsequent processing steps and resulting in a high defect rate; the cutting process is time-consuming, severely restricting the overall production efficiency of 3D hernia repair patches and incurring high labor costs. Therefore, this utility model proposes a cutting device for 3D hernia repair patches with pre-compression molding function, in order to solve the above-mentioned technical problems. Summary of the Invention

[0003] The purpose of this invention is to overcome the defects in the existing technology and provide a cutting device for 3D hernia repair patches with pre-compression forming function. During use, the base plate is directly fixed to the worktable of the crimping machine, exhibiting good compatibility with existing crimping machines. It integrates pre-compression forming and circumferential cutting functions. During the cutting process, the middle template is first squeezed and brought close to the lower template. At this time, the male and female mold surfaces on the mating surfaces of the lower and upper mold cores are fitted together, and the sheet-like 3D hernia repair patch material placed between the male and female mold surfaces is extruded and formed into a 3D hernia repair patch. The material is shaped like a D-shape, and then the upper template drives the circumferential cutter to move downwards. Its circumferential cutting edge extends from the lower port of the circumferential channel and enters the interior of the second circumferential channel, thereby cutting a 3D hernia repair patch from the sheet-like 3D hernia repair patch material. The cutting process is simple, and the edge allowance of the cut 3D hernia repair patch is uniform and stable. Compared with the manual cutting method, it greatly reduces the amount of manual labor involved, and at the same time significantly improves the production and processing efficiency and the finished product qualification rate of the 3D hernia repair patch. The overall structural design is ingenious and reasonable, the preparation and implementation are highly feasible, practical, and economically beneficial.

[0004] To achieve the above objectives, the technical solution of this utility model is to design a cutting device for 3D hernia repair patches with pre-compression molding function, including a base plate. A lower template is fixedly mounted on the upper surface of the base plate. A lower mold core is fixedly mounted on the upper surface of the base plate inside a lower mold core mounting groove in the middle of the lower template. A second circumferential channel is formed between the outer circumferential side of the lower mold core and the inner circumferential side of the lower mold core mounting groove. A guide post extending upwards is fixedly mounted at each of the four corners of the base plate and the lower template. The device also includes a middle template and an upper template, located sequentially above the lower template from bottom to top. The middle template is slidably sleeved onto the middle of the corresponding guide post through a second through hole at one corner. The upper template is slidably sleeved onto the upper end of the corresponding guide post through a third through hole at one corner. An upper mold core is suspended and fixed inside the upper mold core mounting groove in the middle of the middle template, and a first circumferential channel is formed between the outer circumferential side of the upper mold core and the inner circumferential side of the upper mold core mounting groove. The first and second circumferential channels correspond to each other. A circumferential cutter is slidably installed inside the first circumferential channel. The lower end of the circumferential cutter has a circumferential cutting edge for cutting and shaping the outer periphery of the 3D hernia repair patch. The upper end of the circumferential cutter extends above the upper port of the first circumferential channel and is spaced apart from the lower end face of the upper template. Several longitudinal elastic elements are provided circumferentially between the upper end of the circumferential cutter and the upper end face of the middle template to keep the circumferential cutting edge retracted inside the lower end of the circumferential channel. Several longitudinal elastic elements are provided between the middle template and the upper template to keep them separated. Several longitudinal elastic elements are provided between the middle template and the lower template to keep them separated. The lower mold core and the upper mold core correspond to each other, and their mating surfaces are provided with a male mold surface and a female mold surface that are adapted to each other and used for pre-pressing and shaping the 3D hernia repair patch. The elastic coefficient of the first longitudinal elastic element is greater than that of the second longitudinal elastic element.

[0005] This utility model discloses a cutting device for a 3D hernia repair patch with pre-compression forming function. During use, the base plate is directly fixed to the worktable of the crimping machine, ensuring good compatibility with existing crimping machines. It integrates pre-compression forming and circumferential cutting functions. During the cutting process, the middle template is first squeezed and brought close to the lower template. At this time, the male and female mold surfaces on the mating surfaces of the lower and upper mold cores are fitted together, and the sheet-like 3D hernia repair patch material placed between the male and female mold surfaces is extruded and formed into a 3D shape. Subsequently, the upper template drives... The moving circumferential cutter moves downwards, with its circumferential cutting edge extending from the lower port of the circumferential channel and entering the interior of the second circumferential channel. This cuts the 3D hernia repair patch from the sheet-like 3D hernia repair patch material. The cutting process is simple, and the edge allowance of the cut 3D hernia repair patch is uniform and stable. Compared with manual cutting, it significantly reduces the amount of manual labor involved, while significantly improving the production efficiency and finished product qualification rate of 3D hernia repair patches. The overall structural design is ingenious and reasonable, with high feasibility of preparation and implementation, strong practicality, and good economic benefits.

[0006] The preferred technical solution is that the upper edge of the circumferential cutter has an eaves plate that extends horizontally on the outer periphery, the upper surface of the middle template has a number of blind holes three that are circumferentially spaced on the outer periphery of the upper mold core mounting groove, and the lower end of the longitudinal elastic element three is embedded in the corresponding blind hole three, and the upper end is perpendicularly abutted against the corresponding position of the lower surface of the eaves plate.

[0007] The middle template has several threaded through holes 1 penetrating both the front and rear ends. The upper mold core has several threaded through holes 2 penetrating both the front and rear ends. The upper mold core is fixedly installed on the middle template by screws passing through the corresponding threaded through holes 1 and 2. The circumferential cutter has several longitudinal oblong holes on its front and rear sides. The longitudinal oblong holes on the front side of the circumferential cutter are fitted to the front end of the screws, and the longitudinal oblong holes on the rear side of the circumferential cutter are fitted to the rear end of the screws. The installation structure of the upper mold core and the circumferential cutter on the middle template is ingenious and reasonable, ensuring smooth sliding of the circumferential cutter. The upper edge of the circumferential cutter and the upper end face of the middle template are elastically supported by three longitudinally distributed elastic elements, ensuring good stability of the circumferential cutter during cutting and good repositioning after cutting. This ensures that the outer periphery of the cut 3D hernia repair patch is neat and the quality is controllable.

[0008] A further preferred technical solution includes a blind hole 1 on the upper corner of the lower template, a blind hole 2 on the upper corner of the middle template, a blind hole 4 on the lower corner of the middle template, and a blind hole 5 on the lower corner of the upper template. The lower end of the longitudinal elastic element is embedded in the corresponding blind hole 2 on the middle template, and the upper end is embedded in the corresponding blind hole 5 on the upper template. The lower end of the longitudinal elastic element 2 is embedded in the corresponding blind hole 1 on the lower template, and the upper end is embedded in the corresponding blind hole 4 on the middle template. Both ends of the longitudinal elastic element 1 are embedded in the blind holes on the mating surfaces of the upper and middle templates, and similarly, both ends of the longitudinal elastic element 2 are embedded in the blind holes on the mating surfaces of the lower and middle templates. This ensures good structural stability of the longitudinal elastic elements 1 and 2, effectively preventing slippage accidents during the cutting process and ensuring safety in use.

[0009] A further preferred technical solution is that all three longitudinal elastic elements—first, second, and third—are springs. Springs are widely applicable and readily available in the market, ensuring the smooth fabrication and implementation of the cutting equipment of this invention.

[0010] A further preferred technical solution includes a mounting hole one at the corner of the base plate and a mounting hole two in the middle. The lower end of the guide post passes through the corresponding through hole one at the corner of the lower template and is fixed inside the corresponding mounting hole one on the base plate. The lower end face of the lower mold core has a threaded blind hole opening downwards. The lower mold core is fixedly connected to the base plate by screws passing through the corresponding mounting hole two and the threaded blind hole from bottom to top. The fixing and installation method of the lower mold core and guide post on the base plate is simple, further ensuring the smooth preparation and implementation of the cutting equipment of this utility model.

[0011] A further preferred technical solution is that the male mold surface is located on the lower end face of the lower mold core, and the male mold surface protrudes above the upper end face of the lower mold template, while the female mold surface is located on the lower end face of the upper mold core. The reasonable layout of the male and female mold surfaces facilitates the precise laying of sheet-like 3D hernia repair patch material, while ensuring that the circumferential cutter can accurately and quickly cut out the 3D hernia repair patch.

[0012] The advantages and beneficial effects of this utility model are as follows:

[0013] 1. This utility model discloses a cutting device for a 3D hernia repair patch with pre-compression forming function. During use, the base plate is directly fixed to the worktable of the crimping machine, ensuring good compatibility with existing crimping machines. It integrates pre-compression forming and circumferential cutting functions. During the cutting process, the middle template is first squeezed and brought close to the lower template. At this time, the male and female mold surfaces on the mating surfaces of the lower and upper mold cores are fitted together, and the sheet-like 3D hernia repair patch material placed between the male and female mold surfaces is extruded and formed into a 3D shape. Subsequently, the upper template... The circumferential cutter moves downward, with its circumferential cutting edge extending from the lower port of the circumferential channel and entering the interior of the second circumferential channel. This cuts a 3D hernia repair patch from the sheet-like 3D hernia repair patch material. The cutting process is simple, and the edge allowance of the cut 3D hernia repair patch is uniform and stable. Compared with manual cutting, it significantly reduces the amount of manual labor involved, while significantly improving the production efficiency and finished product qualification rate of 3D hernia repair patches. The overall structural design is ingenious and reasonable, with high feasibility, strong practicality, and good economic benefits.

[0014] 2. The installation structure of the upper mold core and circumferential cutter on the middle template is ingenious and reasonable, ensuring smooth sliding of the circumferential cutter during its up and down movement; the upper edge of the circumferential cutter and the upper surface of the middle template are supported by three elastic elements distributed in a circumferential direction, ensuring good stability of the circumferential cutter during the cutting process and good repositioning after cutting, thereby ensuring that the outer periphery of the cut 3D hernia repair patch is neat and the quality is controllable.

[0015] 3. The two ends of the longitudinal elastic element one are embedded in the blind holes on the mating surfaces of the upper and middle templates. Similarly, the two ends of the longitudinal elastic element two are embedded in the blind holes on the mating surfaces of the lower and middle templates. This ensures good stability of the installation structure of the longitudinal elastic element one and the longitudinal elastic element two, thereby effectively preventing the longitudinal elastic element one and the longitudinal elastic element two from slipping during the operation of the cutting equipment and ensuring safety in use. Attached Figure Description

[0016] Figure 1 This is a three-dimensional view from the left front side of the cutting equipment for the 3D hernia repair patch with pre-compression molding function of this utility model;

[0017] Figure 2 This is an exploded view of a cutting device for a 3D hernia repair patch with pre-compression molding function according to this utility model;

[0018] Figure 3 It is an assembly diagram of the guide pillars, base plate, lower template, lower mold core, and some longitudinal elastic elements.

[0019] Figure 4 This is a three-dimensional view of the right front side of the circumferential cutter;

[0020] Figure 5 It is a top-view 3D diagram showing the assembly relationship of the circumferential cutter, upper mold core, and some guide pillars on the middle template.

[0021] Figure 6 It is a three-dimensional view from an upward angle showing the assembly relationship of the circumferential cutter, upper mold core, and some guide pillars on the middle template.

[0022] Figure 7 This is a longitudinal sectional view of a cutting device for a 3D hernia repair patch with pre-compression molding function according to this utility model;

[0023] Figure 8 This is a diagram showing the pre-compression forming state of the cutting equipment for the 3D hernia repair patch with pre-compression forming function of this utility model;

[0024] Figure 9 yes Figure 8 Longitudinal sectional view of the cutting equipment;

[0025] Figure 10 This is a front view of the cutting device for a 3D hernia repair patch with pre-compression molding function of this utility model when the upper template starts to push the circumferential cutter and the upper end of the longitudinal elastic element.

[0026] Figure 11 This is a front view of the cutting state of the cutting equipment for the 3D hernia repair patch with pre-compression molding function of this utility model;

[0027] Figure 12 yes Figure 11 Longitudinal sectional view of the cutting equipment.

[0028] In the diagram: 1. Base plate; 2. Lower template; 3. Lower mold core; 4. Middle template; 5. Upper mold core; 6. Circumferential cutter; 7. Upper template; 8. Guide post; 9. Screw post; 10. Longitudinal elastic element one; 11. Longitudinal elastic element two; 12. Longitudinal elastic element three; 13. Circumferential channel one; 14. Circumferential channel two; 15. Screw; 1-1. Mounting hole one; 1-2. Mounting hole two; 2-1. Lower mold core mounting groove; 2-2. Through hole one; 2-3. Blind hole one; 3-1. Male mold surface; 4-1. Upper mold core mounting groove; 4-2. Through hole two; 4-3. Blind hole two; 4-4. Threaded through hole one; 4-5. Blind hole three; 4-6. Blind hole four; 5-1. Female mold surface; 6-1. Circumferential cutting edge; 6-2. Eaves plate; 6-3. Longitudinal waist-shaped hole. Detailed Implementation

[0029] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0030] Example

[0031] like Figures 1-7As shown, a cutting device for a 3D hernia repair patch with pre-compression molding function includes a base plate 1. A lower template 2 is fixedly mounted on the upper surface of the base plate 1. A lower mold core 3 is fixedly mounted on the upper surface of the base plate 1 inside a lower mold core mounting groove 2-1 opened in the middle of the lower template 2. A circumferential channel 2-1 is formed between the outer peripheral side of the lower mold core 3 and the inner peripheral side of the lower mold core mounting groove 2-1. A guide post 8 extending upward is fixedly mounted at each of the four corners of the base plate 1 and the lower template 2. The device also includes a guide post extending upward from the bottom. The middle template 4 and the upper template 7 are located above the lower template 2, respectively. The middle template 4 is slidably sleeved onto the middle part of the corresponding guide post 8 through a second through hole 4-2 at the corner. The upper template 7 is slidably sleeved onto the upper end of the corresponding guide post 8 through a third through hole at the corner. The upper mold core 5 is suspended and fixed inside the upper mold core mounting groove 4-1 in the middle part of the middle template 4, and an annular channel 13 is formed between the outer peripheral side of the upper mold core 5 and the inner peripheral side of the upper mold core mounting groove 4-1. The annular channel 13 and Corresponding to the second circumferential channel 14, a circumferential cutter 6 is slidably installed inside the first circumferential channel 13. The lower end of the circumferential cutter 6 has a circumferential cutting edge 6-1 for cutting and shaping the outer periphery of the 3D hernia repair patch. The upper end of the circumferential cutter 6 extends above the upper port of the first circumferential channel 13 and is spaced apart from the lower end face of the upper template 7. A plurality of longitudinal elastic elements 31 are provided circumferentially between the upper end of the circumferential cutter 6 and the upper end face of the middle template 4 to keep the circumferential cutting edge 6-1 retracted inside the lower end of the first circumferential channel 13. 2. A plurality of longitudinal elastic elements 10 are provided between the middle template 4 and the upper template 7 to keep them in a spaced-apart state. A plurality of longitudinal elastic elements 21 are provided between the middle template 4 and the lower template 2 to keep them in a spaced-apart state. The lower mold core 3 and the upper mold core 5 correspond to each other, and their mating surfaces are provided with a male mold surface 3-1 and a female mold surface 5-1 that are adapted to each other and used for pre-pressing and molding the 3D hernia repair patch. The elastic coefficient of the longitudinal elastic element 10 is greater than the elastic coefficient of the longitudinal elastic element 21.Among them, the elastic coefficient of longitudinal elastic element 10 is greater than that of longitudinal elastic element 11. This ensures that when the upper template 7 is pressed downward by the punch head on the crimping machine during the cutting process, the longitudinal elastic element 11 is compressed and deformed first. This allows the male mold surface 3-1 and the female mold surface 5-1 to close and press the sheet-like 3D hernia repair patch material placed between them into a 3D shape, laying the foundation for the subsequent cutting action of the circumferential cutter 6. The upper end of the circumferential cutter 6 extends above the upper port of the circumferential channel 13 and is spaced apart from the lower end face of the upper template 7 by a certain distance. The purpose of this distance is to provide a certain buffer margin when the upper template 7 is suddenly subjected to the instantaneous downward punching force from the upper punch head of the pressing machine. That is, even if the longitudinal elastic element-10 undergoes a certain degree of compression deformation, it will not adhere to the eaves plate 6-2 at the upper end of the circumferential cutter 6. During the pre-pressing process of the sheet-like 3D hernia repair patch material, the circumferential cutting edge 6-2 at the lower end of the circumferential cutter 6 is always retracted into the lower end of the circumferential channel-13, thereby ensuring the smoothness of the mold closing process of the male mold surface 3-1 and the female mold surface 5-1 of the lower mold core 3 and the upper mold core 5.

[0032] Preferably, the upper edge of the circumferential cutter 6 has an eaves plate 6-2 extending horizontally on the outer periphery, and the upper surface of the middle template 4 has a number of blind holes 4-5 distributed circumferentially at intervals on the outer periphery of the upper mold core mounting groove 4-1. The lower end of the longitudinal elastic element 12 is embedded in the corresponding blind hole 4-5, and the upper end is perpendicularly abutted against the corresponding position of the lower surface of the eaves plate 6-2.

[0033] The middle template 4 has several threaded through holes 4-4 penetrating both the front and rear ends. The upper mold core 5 has several threaded through holes 2 penetrating both the front and rear ends. The upper mold core 5 is fixedly installed on the middle template 4 by threaded rods 9 passing through the corresponding threaded through holes 1 and 2. The front and rear sides of the circumferential cutter 6 have several longitudinal waist-shaped holes 6-3. The longitudinal waist-shaped holes 6-3 on the front side of the circumferential cutter 6 are sleeved on the front end of the threaded rod 9, and the longitudinal waist-shaped holes 6-3 on the rear side of the circumferential cutter 6 are sleeved on the rear end of the threaded rod 9.

[0034] More preferably, the lower template 2 has a blind hole 2-3 at the upper corner, the middle template 4 has a blind hole 4-3 at the upper corner and a blind hole 4-6 at the lower corner, the upper template 7 has a blind hole 5 at the lower corner, the longitudinal elastic element 10 has its lower end embedded in the corresponding blind hole 4-3 on the middle template 4 and its upper end embedded in the corresponding blind hole 5 on the upper template 7, and the longitudinal elastic element 11 has its lower end embedded in the corresponding blind hole 2-3 on the lower template 2 and its upper end embedded in the corresponding blind hole 4-6 on the middle template 4.

[0035] More preferably, the longitudinal elastic element 10, longitudinal elastic element 2 11, and longitudinal elastic element 3 12 are all springs.

[0036] More preferably, the base plate 1 has a mounting hole 1-1 at one corner and a mounting hole 1-2 in the middle. The lower end of the guide post 8 passes through the corresponding through hole 2-2 at the corner of the lower template 2 and is fixed inside the corresponding mounting hole 1-1 on the base plate 1. The lower end face of the lower mold core 3 has a threaded blind hole with an opening facing downward. The lower mold core 3 is fixedly connected to the base plate 1 by a screw 15 that passes through the corresponding mounting hole 1-2 and the threaded blind hole from bottom to top.

[0037] More preferably, the male mold surface 3-1 is disposed on the lower end surface of the lower mold core 3, and the male mold surface 3-1 protrudes above the upper end surface of the lower template 2, and the female mold surface 5-1 is disposed on the lower end surface of the upper mold core 5.

[0038] The working principle of the cutting device for a 3D hernia repair patch with pre-compression molding function of this utility model is as follows:

[0039] Step 1: In use, fix the base plate 1 on the worktable of the crimping machine, and position the crimping machine's punch head above the upper template 7. In the initial state, several longitudinal elastic elements 10, 11, and 12 maintain their natural expansion and contraction. At this time, the upper template 7, the middle template 4, and the lower template 2 maintain a certain distance between them (see Appendix). Figure 1 and attached Figure 7 );

[0040] Step 2: Place the sheet-like 3D hernia repair patch material onto the male mold surface 3-1 of the lower mold core 3. Start the working button of the pressing machine. The punch head moves downward and drives the upper mold plate 7 downward. During this process, several longitudinal elastic elements 11 are compressed first, and then the middle mold plate 4 and the lower mold plate 2 are pressed together (see Appendix). Figure 8 and attached Figure 9 At this time, the male mold surface 3-1 on the lower mold core 3 and the female mold surface 5-1 on the upper mold core 5 close together, and the sheet-like 3D hernia repair patch material is pre-pressed into a 3D shape and pressed. The cutting equipment is then switched to the pre-pressing state.

[0041] Step 3: The punch head continues to move downwards and drives the upper template 7 to continue moving downwards. During this process, several longitudinal elastic elements 10 are compressed, causing the lower end face of the upper template 7 to be pressed and adhered together with the eaves 6-2 on the upper edge of the circumferential cutter 6 (see Appendix). Figure 10The punch head continues to move downwards, driving the upper template 7 and the circumferential cutter 6 to continue moving downwards until the upper template 7 and the middle template 4 are pressed together. At this time, the circumferential cutting edge 6-2 at the lower end of the circumferential cutter 6 passes through the lower end of the circumferential channel 13 to cut out the outer periphery of the 3D hernia repair patch and enters the interior of the circumferential channel 2 14 (see Appendix). Figure 11 and attached Figure 12 Finally, the stamping head slowly resets. During this process, the longitudinal elastic element 10, longitudinal elastic element 21, and longitudinal elastic element 32 gradually reset, and the cutting equipment returns to its initial state. The cut 3D hernia repair patch is then removed and the edge waste is cleaned up before it can be used for the next 3D hernia repair patch cutting work.

[0042] This utility model discloses a cutting device for a 3D hernia repair patch with pre-compression forming function. During use, the base plate is directly fixed to the worktable of the crimping machine, ensuring good compatibility with existing crimping machines. It integrates pre-compression forming and circumferential cutting functions. During the cutting process, the middle template is first squeezed and brought close to the lower template. At this time, the male and female mold surfaces on the mating surfaces of the lower and upper mold cores are fitted together, and the sheet-like 3D hernia repair patch material placed between the male and female mold surfaces is extruded and formed into a 3D shape. Subsequently, the upper template drives... The moving circumferential cutter moves downwards, with its circumferential cutting edge extending from the lower port of the circumferential channel and entering the interior of the second circumferential channel. This cuts the 3D hernia repair patch from the sheet-like 3D hernia repair patch material. The cutting process is simple, and the edge allowance of the cut 3D hernia repair patch is uniform and stable. Compared with manual cutting, it significantly reduces the amount of manual labor involved, while significantly improving the production efficiency and finished product qualification rate of 3D hernia repair patches. The overall structural design is ingenious and reasonable, with high feasibility of preparation and implementation, strong practicality, and good economic benefits.

[0043] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A cutting device for a 3D hernia repair patch with pre-compression molding function, characterized in that, The system includes a base plate (1), a lower template (2) fixedly mounted on the upper surface of the base plate (1), a lower mold core (3) fixedly mounted on the upper surface of the base plate (1) inside a lower mold core mounting groove (2-1) in the middle of the lower template (2), and a circumferential channel (14) is formed between the outer peripheral side of the lower mold core (3) and the inner peripheral side of the lower mold core mounting groove (2-1). A guide post (8) extending upward is fixedly mounted at each of the four corners of the base plate (1) and the lower template (2). The system also includes a middle template (4) located above the lower template (2) from bottom to top. The middle template (4) is slidably sleeved onto the middle part of the corresponding guide post (8) through the second through hole (4-2) opened at the corner. The upper template (7) is slidably sleeved onto the upper end of the corresponding guide post (8) through the third through hole opened at the corner. The upper mold core (5) is suspended and fixed inside the upper mold core mounting groove (4-1) opened in the middle of the middle template (4). A circumferential channel one (13) is formed between the outer peripheral side of the upper mold core (5) and the inner peripheral side of the upper mold core mounting groove (4-1). The circumferential channel one (13) and the circumferential channel two (14) are opposite to each other. A circumferential cutter (6) is slidably installed inside the circumferential channel (13). The lower end of the circumferential cutter (6) has a circumferential cutting edge (6-1) for cutting and shaping the outer periphery of the 3D hernia repair patch. The upper end of the circumferential cutter (6) extends above the upper port of the circumferential channel (13) and is spaced apart from the lower end face of the upper template (7). A plurality of longitudinal elastic elements (12) are provided circumferentially between the upper end of the circumferential cutter (6) and the upper end face of the middle template (4) to keep the circumferential cutting edge (6-1) retracted inside the lower end of the circumferential channel (13). A plurality of longitudinal elastic elements (10) are provided between the middle template (4) and the upper template (7) to keep them separated. A plurality of longitudinal elastic elements (11) are provided between the middle template (4) and the lower template (2) to keep them separated. The lower mold core (3) and the upper mold core (5) correspond to each other, and their mating surfaces are provided with a male mold surface (3-1) and a female mold surface (5-1) that are adapted to each other and used for pre-pressing and molding 3D hernia repair patch. The elastic coefficient of the longitudinal elastic element (10) is greater than that of the longitudinal elastic element (11).

2. The cutting equipment for a 3D hernia repair patch with pre-compression molding function as described in claim 1, characterized in that, The upper edge of the circumferential cutter (6) has an eaves plate (6-2) extending horizontally on the outer periphery. The upper surface of the middle template (4) has several blind holes (4-5) distributed circumferentially at intervals on the outer periphery of the upper mold core mounting groove (4-1). The lower end of the longitudinal elastic element (12) is embedded in the corresponding blind hole (4-5), and the upper end is perpendicularly abutted against the corresponding position of the lower surface of the eaves plate (6-2). The middle template (4) has several threaded through holes 1 (4-4) penetrating the front and rear end faces. The upper mold core (5) has several threaded through holes 2 penetrating the front and rear end faces. The upper mold core (5) is fixedly installed on the middle template (4) by screw rods (9) that pass through the corresponding threaded through holes 1 and 2. The front and rear sides of the circumferential cutter (6) have several longitudinal waist-shaped holes (6-3). The longitudinal waist-shaped hole (6-3) on the front side of the circumferential cutter (6) is sleeved on the front end of the screw rod (9), and the longitudinal waist-shaped hole (6-3) on the rear side of the circumferential cutter (6) is sleeved on the rear end of the screw rod (9).

3. The cutting equipment for a 3D hernia repair patch with pre-compression molding function as described in claim 2, characterized in that, The lower template (2) has a blind hole 1 (2-3) at the upper corner, the middle template (4) has a blind hole 2 (4-3) at the upper corner and a blind hole 4 (4-6) at the lower corner, the upper template (7) has a blind hole 5 at the lower corner, the lower end of the longitudinal elastic element 1 (10) is embedded in the corresponding blind hole 2 (4-3) on the middle template (4) and the upper end is embedded in the corresponding blind hole 5 on the upper template (7), the lower end of the longitudinal elastic element 2 (11) is embedded in the corresponding blind hole 1 (2-3) on the lower template (2) and the upper end is embedded in the corresponding blind hole 4 (4-6) on the middle template (4).

4. The cutting equipment for a 3D hernia repair patch with pre-compression molding function as described in claim 3, characterized in that, The three longitudinal elastic elements (10), (11), and (12) are all springs.

5. The cutting equipment for a 3D hernia repair patch with pre-compression molding function as described in claim 4, characterized in that, The base plate (1) has a mounting hole 1 (1-1) at the corner and a mounting hole 2 (1-2) in the middle. The lower end of the guide post (8) passes through the corresponding through hole 1 (2-2) at the corner of the lower template (2) and is fixed inside the corresponding mounting hole 1 (1-1) on the base plate (1). The lower end face of the lower mold core (3) has a threaded blind hole with an opening facing downward. The lower mold core (3) is fixedly connected to the base plate (1) by screws (15) that pass through the corresponding mounting hole 2 (1-2) and the threaded blind hole from bottom to top.

6. The cutting equipment for a 3D hernia repair patch with pre-compression molding function as described in claim 5, characterized in that, The male mold surface (3-1) is located on the lower end surface of the lower mold core (3), and the male mold surface (3-1) protrudes above the upper end surface of the lower template (2). The female mold surface (5-1) is located on the lower end surface of the upper mold core (5).

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