Preparation device of extrusion-formed barb type medical suture
Through the cooperation of the constant temperature water control of the lower die assembly of the extrusion molding device and the roller-type upper die assembly, the problems of processing accuracy and efficiency of barbed sutures are solved, and efficient and accurate suture production is achieved.
Patent Information
- Application Number
- CN202510807745.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-17
- Publication Date
- 2025-09-12
AI Technical Summary
The existing processing methods of barbed sutures have problems such as difficulty in ensuring production stability and precision, high costs, and unsuitability for large-scale production, resulting in a gap in production capacity and output between domestic and foreign products.
Adopting extrusion molding device, through the constant temperature water control of lower die assembly and the cooperation of roller type upper die assembly, the precise barb shape processing of suture line is realized, with high production efficiency and suitable for large-scale production.
The invention realizes the accurate shape of the barb of the suture thread, high production efficiency, and unaffected strength and toughness of the suture thread, and is suitable for large-scale industrial production.
Smart Images
Figure CN120620685A_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the field of medical device manufacturing technology, and specifically relates to a device for preparing extruded barbed medical sutures. Background Art
[0002] Medical sutures are commonly used in medical surgeries, assisting in wound closure and stabilizing wound tissue. Conventional sutures are pulled through the wound using a needle and tightened with knots to promote wound healing. The shape and mechanical properties of the sutures themselves directly affect the tension and strength of the sutures, which in turn influences postoperative wound healing, the difficulty and duration of the surgery, and the aesthetics of the surgery.
[0003] Compared to conventional sutures, the barbs of barbed sutures are more complex to create. Processing methods include mechanical cutting, laser cutting, mold injection molding, stamping, extrusion, and chemical etching. Each of these methods has its own advantages and disadvantages. Mechanical cutting offers the advantages of mass-produced production equipment, ease of maintenance, and theoretically precise control of the barb's geometric parameters. Its disadvantages, however, lie in the difficulty in reliably ensuring stability and precision during actual processing. Laser cutting offers the advantage of precise barb shape, but the melt can splash onto the suture, affecting its surface quality and strength. Furthermore, the instantaneous nature of the laser cutting process prevents the barb's shape from expanding, affecting its grip on tissue. Furthermore, laser cutting is more expensive than mechanical cutting. Molded injection molding offers the advantage of low product cost and, compared to cutting, does not weaken the suture's core strength. However, this method's complex production process, coupled with mold constraints, makes it unsuitable for large-scale industrial production and prevents the rapid production of large quantities of products. The stamping method has disadvantages such as inaccurate barb shape and easy wear of the mold; the extrusion method is not suitable for all types of suture materials, and the barb shape is simple; chemical candle engraving has defects such as chemical solutions affecting the mechanical properties of suture materials and the biocompatibility of sutures.
[0004] To meet the demands of mass production and maintain the overall performance of sutures, the current production method for barbed sutures is primarily mechanical cutting. Furthermore, due to limitations in processing equipment and manufacturing processes, there is a significant gap between domestic and foreign products in terms of both production capacity and output. Summary of the Invention
[0005] The present application provides a device for preparing an extruded barbed medical suture to solve the above-mentioned technical problems.
[0006] In order to solve the above technical problems, a technical solution adopted in this application is: a preparation device for extruded barbed medical sutures, comprising a base plate, a lower mold assembly and an upper mold assembly; a lifting assembly is provided in the middle of the base plate, a strip workbench is fixed on the spiral lifting assembly, and the lower mold assembly is arranged on the strip workbench; the upper mold assembly is located above the lower mold assembly and is perpendicular to the strip workbench; the two sides of the roller shaft in the upper mold assembly are movably connected to the base plate through a sliding assembly and a driving assembly; wherein, a rack table parallel to the strip workbench is provided in the base plate; a gear meshing with the rack table is provided in the middle of the roller shaft to drive the upper mold assembly to rotate.
[0007] Furthermore, the lower mold assembly includes a lower mold base, bolt openings are provided on both sides of the lower side of the lower mold base, the bolt openings are connected to the upper side of the bar workbench through fixing bolts, a lower wire groove is provided in the lower mold base and arranged parallel to the bar workbench, and wire pressing racks connected to the base plate are provided on both sides of the lower wire groove; wherein, a water inlet is provided on one side of the lower mold base, and a water outlet is provided on one side of the lower mold base, the interior of the lower mold base is hollow and respectively connected to the water inlet and the water outlet, and the water inlet is used for an external constant temperature water tank.
[0008] Furthermore, the lower line trough includes a secondary line trough and a main line trough. The secondary line trough is located at the front and rear sides of the main line trough, and multiple groups of first barb grooves are symmetrically arranged on both sides of the main line trough.
[0009] Furthermore, the upper mold assembly also includes an annular sleeve sleeved on the roller shaft, and an upper wire groove is provided in the annular sleeve; the upper wire groove includes an annular wire groove corresponding to the position of the main wire groove, and second barb grooves corresponding to the first barb grooves are provided on both sides of the annular wire groove.
[0010] Furthermore, the driving assembly includes a driving motor, a screw shaft seat and a screw arranged parallel to the bar workbench, and the driving motor and the screw shaft seat are both located on the side end of the base plate close to the rack table; the screw is sleeved in the screw shaft seat and connected to the rotating shaft of the driving motor; a threaded sleeve is sleeved in the screw, and a U-shaped plate sleeved on both sides of the screw is fixedly connected to one side of the threaded sleeve, and a horizontal plate is provided on the upper side of the U-shaped plate, and a first bearing seat is provided on the horizontal plate, and the first bearing seat is sleeved on one side of the roller shaft through a bearing.
[0011] Furthermore, the sliding assembly includes a sliding rail, a sliding block and a second shaft seat. A strip-shaped boss is provided on the edge of the base plate away from the drive motor, and a sliding rail is provided on the strip-shaped boss. The sliding block is slidably set on the slide rail, and the second shaft seat is set on the sliding block. The second shaft seat is connected to the other side of the roller shaft through a bearing.
[0012] Furthermore, the lifting assembly includes a spiral motor, a spiral screw and a guide column. The spiral motor is embedded in the groove on the surface of the base plate through the motor seat. The spiral screw is vertically arranged and connected to the rotating shaft of the spiral motor. The top of the spiral screw is sleeved in the threaded sleeve located at the bottom of the bar workbench; the guide column is vertically arranged to the base plate and sleeved with the through hole in the bottom plate of the bar workbench.
[0013] Furthermore, the rack platform includes a base and a rack. The base is vertically arranged between the workbench and the screw rod. The rack is located above the base and vertically arranged with the roller shaft. The rack is meshed with the gear.
[0014] The beneficial effects of the present application are as follows: the present application uses an extrusion device composed of a lower die with a constant temperature control system and a wheel-type upper die to extrude and form the suture barb, so that the barb shape of the suture barb is accurate and the production efficiency is high. The lower die assembly is designed as a hollow structure, and constant temperature water is filled into the cavity through an interface to keep the suture at a reasonable deformation temperature. The upper die assembly is designed as a roller-type structure, and the upper wire groove is arranged on the annular sleeve. The upper die assembly performs pure rolling relative to the lower die assembly. During the suture production process, the wire is not subjected to tension, which can ensure that the cross-sectional dimensions of the suture spool remain consistent and will not affect its strength and toughness. The roller-type upper die assembly is used, and its moving distance depends on the angle of rotation of the upper die, so barbed sutures of any length can be processed. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a schematic structural diagram of an embodiment of a device for preparing an extruded barbed medical suture thread of the present application;
[0016] Figure 2 This is a side structural schematic diagram of an embodiment of a device for preparing an extruded barbed medical suture thread of the present application;
[0017] Figure 3 yes Figure 1 A structural diagram of an embodiment of a lower mold assembly in FIG.
[0018] Figure 4 yes Figure 3 Schematic diagram of the structure of area A in FIG;
[0019] Figure 5 yes Figure 1 A structural diagram of an embodiment of an upper mold assembly;
[0020] Figure 6 yes Figure 5 A schematic structural diagram of an embodiment of area B in FIG.
[0021] Figure 7 yes Figure 1 A schematic structural diagram of an embodiment of a drive assembly in FIG.
[0022] Figure 8 yes Figure 1 A structural diagram of an embodiment of a sliding assembly in FIG.
[0023] Figure 9 yes Figure 1 A structural diagram of an embodiment of a lifting assembly in FIG. DETAILED DESCRIPTION
[0024] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to specific embodiments.
[0025] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from the description. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.
[0026] See Figure 1-2 , Figure 1 This is a schematic structural diagram of an embodiment of the extruded barbed medical suture preparation device of the present application. The device includes a base plate 1, a lower die assembly 2, and an upper die assembly 3; a lifting assembly 4 is provided in the middle of the base plate 1, a strip workbench 5 is fixedly connected to the spiral lifting assembly 4, and the lower die assembly 2 is arranged on the strip workbench 5; the upper die assembly 3 is located above the lower die assembly 2 and is perpendicular to the strip workbench 5; the roller 31 in the upper die assembly 3 is movably connected to the base plate 1 through a sliding assembly 7 and a driving assembly 6 on both sides; wherein, a rack table 8 parallel to the strip workbench 5 is provided in the base plate 1; a gear 34 meshing with the rack table 8 is provided in the middle of the roller 31 to drive the upper die assembly 3 to rotate. The upper die assembly 3 in the above design adopts the roller 31 design, so that the upper die assembly 3 can purely roll relative to the lower die assembly 2, thereby forming an extrusion device with precise barb shape and high production efficiency.
[0027] See Figure 3-4 , the lower mold assembly 2 includes a lower mold base 21, and bolt openings 22 are provided on both sides of the lower side of the lower mold base 21. The bolt openings 22 are connected to the upper side of the strip workbench 5 by fixing bolts. A lower wire groove 23 is provided in the lower mold base 21 and is arranged parallel to the strip workbench 5. A wire pressing rack 9 connected to the base plate 1 is provided on both sides of the lower wire groove 23; wherein, a water inlet 24 is provided on one side of the lower mold base 21, and a water outlet 25 is provided on one side of the lower mold base 21. The interior of the lower mold base 21 is hollow and is connected to the water inlet 24 and the water outlet 25 respectively, and the water inlet 24 is used to connect an external constant temperature water tank. The lower mold assembly 2 in the above design is designed to be a hollow structure. Constant temperature water is filled into the cavity through an interface to keep the suture at a reasonable deformation temperature. The wire pressing rack 9 can suppress the suture blank in the lower wire groove 23 to prevent the suture from escaping from the wire groove during extrusion.
[0028] The lower suture channel 23 includes a secondary suture channel 231 and a primary suture channel 232. The secondary suture channels 231 are located on both sides of the primary suture channel 232. Multiple sets of first barb grooves 233 are symmetrically arranged on either side of the primary suture channel 232. The secondary suture channel 231 in this design is used to accommodate the circular suture at the center of the barbed suture. The inorganic material, such as PP and PPDO, is squeezed outward from the circular suture through the primary suture channel 232, forming the barbs.
[0029] See Figure 5-6 The upper die assembly 3 also includes an annular sleeve 32 sleeved on the roller 31, and an upper thread groove 33 is provided in the annular sleeve 32; the upper thread groove 33 includes an annular thread groove 331 corresponding to the position of the main thread groove 232, and a second barb groove 332 corresponding to the first barb groove 233 is provided on both sides of the annular thread groove 331. The above design adopts the roller 31 type upper die assembly 3, and its moving distance depends on the angle of rotation of the upper die, so it can process barbed sutures of any length.
[0030] See Figure 7 The drive assembly 6 includes a drive motor 61, a screw shaft seat 62, and a screw 63 arranged parallel to the strip workbench 5. The drive motor 61 and the screw shaft seat 62 are both located on the side end of the base plate 1 near the rack platform 8; the screw 63 is sleeved in the screw shaft seat 62 and connected to the rotating shaft of the drive motor 61; a threaded sleeve 64 is sleeved in the screw 63, and one side of the threaded sleeve 64 is fixedly connected to a U-shaped plate 65 sleeved on both sides of the screw 63. A cross plate 66 is provided on the upper side of the U-shaped plate 65, and a first bearing seat 67 is provided on the cross plate 66. The first bearing seat 67 is sleeved with one side of the roller shaft 31 through a bearing. The rotation of the drive motor 61 in the above design can drive the screw 63 to rotate, thereby driving the threaded sleeve 64 and the U-shaped plate 65 to move back and forth, thereby driving the first bearing seat 67 and the roller shaft 31 to move back and forth.
[0031] See Figure 8 The sliding assembly 7 includes a slide rail 71, a sliding block 72, and a second shaft seat 73. A strip-shaped boss 11 is provided on the edge of the base plate 1, away from the drive motor 61. The strip-shaped boss 11 is provided with the slide rail 71. The sliding block 72 is slidably mounted on the slide rail 71. The second shaft seat 73 is mounted on the sliding block 72. The second shaft seat 73 is sleeved with the other side of the roller shaft 31 via a bearing. The sliding block 72 in this design can drive the second shaft seat 73 and the roller shaft 31 to move back and forth, thereby allowing the upper mold assembly 3 to move back and forth along the direction of the main line groove 232.
[0032] See Figure 9The lifting assembly 4 includes a screw motor 41, a screw rod 43, and a guide post 42. The screw motor 41 is embedded in the groove 12 on the surface of the base plate 1 through a motor seat 44. The screw rod 43 is vertically arranged and connected to the rotating shaft of the screw motor 41. The top of the screw rod 43 is sleeved in a threaded sleeve 45 located at the bottom of the strip workbench 5. The guide post 42 is perpendicular to the base plate 1 and sleeved in a through hole 51 in the bottom plate of the strip workbench 5. The rotation of the screw motor 41 in the above design can drive the screw sleeve 45 to rise and fall, thereby controlling the rise and fall of the workbench and, therefore, the distance between the lower wire groove 23 and the upper wire groove 33.
[0033] Rack stand 8 includes a base 81 and a rack 82. Base 81 is vertically positioned between the workbench and screw 63. Rack 82 is positioned above base 81 and perpendicular to roller shaft 31. Rack 82 meshes with gear 34. The meshing of rack 82 and gear 34 in this design allows roller shaft 31 to rotate, thereby causing upper mold assembly 3 to perform a purely rolling operation relative to lower mold assembly 2, facilitating extrusion of the suture.
[0034] The specific working principle is that the automatic conveying device of the external clamping device clamps the suture blank and transfers it to the space between the lower wire groove 23 and the wire pressing frame 9. The lifting assembly 4 is started, and the workbench drives the lower die to rise, so that the suture blank is pressed between the lower die and the wire pressing frame 9, and the upper and lower dies are also in contact. When the drive motor 61 drives the screw 63 to rotate, the threaded sleeve 64 drives the entire upper die assembly 3 to move linearly. At the same time, through the engagement of the gear 34 and the rack 82, the rotation of the upper die is realized, which realizes the pure rolling of the upper die relative to the lower die, thereby squeezing out the main line axis and the shape of the barb of the suture. After the barb-type suture is extruded and formed, the spiral lifting device is started again, and the workbench and the lower die descend, forming a gap between the lower die and the wire pressing frame 9. The automatic conveying device moves in the next section of the barb-type suture while removing the processed barb-type suture. At the same time, the screw 63 is reversed, driving the upper die assembly 3 to reset and wait for the next operation. During operation, the water inlet and outlet 25 in the lower mold base 21 are connected to a constant temperature water tank to ensure that the mold maintains a suitable temperature.
[0035] The above description is merely an embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.
Claims
1. A device for preparing an extruded barbed medical suture, characterized in that: include: A base plate, a lower mold assembly and an upper mold assembly; a lifting assembly is provided in the middle of the base plate, the spiral lifting assembly is fixedly connected to a strip workbench, and the lower mold assembly is arranged on the strip workbench; the upper mold assembly is located above the lower mold assembly and is perpendicular to the strip workbench; the two sides of the roller shaft in the upper mold assembly are movably connected to the base plate through a sliding assembly and a driving assembly; wherein, a rack table parallel to the strip workbench is provided in the base plate; a gear meshing with the rack table is provided in the middle of the roller shaft to drive the upper mold assembly to rotate.
2. The device for preparing an extruded barbed medical suture according to claim 1, characterized in that: The lower mold assembly includes a lower mold base, and bolt holes are provided on both sides of the lower side of the lower mold base. The bolt holes are connected to the upper side of the bar workbench through fixing bolts. A lower wire groove is provided in the lower mold base and is arranged parallel to the bar workbench. Wire pressing racks connected to the base plate are provided on both sides of the lower wire groove; wherein, a water inlet is provided on one side of the lower mold base, and a water outlet is provided on one side of the lower mold base. The interior of the lower mold base is hollow and is respectively connected to the water inlet and the water outlet, and the water inlet is used for an external constant temperature water tank.
3. The device for preparing an extruded barbed medical suture according to claim 2, characterized in that: The lower wire trough includes a secondary wire trough and a main wire trough. The secondary wire trough is located at the front and rear sides of the main wire trough. A plurality of first barb grooves are symmetrically arranged on both sides of the main wire trough.
4. The device for preparing an extruded barbed medical suture according to claim 3, characterized in that: The upper mold assembly also includes an annular sleeve sleeved on the roller shaft, and an upper wire groove is provided in the annular sleeve; the upper wire groove includes an annular wire groove corresponding to the position of the main wire groove, and second barb grooves corresponding to the first barb grooves are provided on both sides of the annular wire groove.
5. The device for preparing an extruded barbed medical suture according to claim 4, characterized in that: The driving assembly includes a driving motor, a screw shaft seat and a screw arranged parallel to the strip workbench, the driving motor and the screw shaft seat are both located in the base plate near the side end of the rack table; the screw is sleeved in the screw shaft seat and connected to the rotating shaft of the driving motor; a threaded sleeve is sleeved in the screw, and one side of the threaded sleeve is fixedly connected to a U-shaped plate sleeved on both sides of the screw, a horizontal plate is provided on the upper side of the U-shaped plate, and a first bearing seat is provided on the horizontal plate, and the first bearing seat is sleeved on one side of the roller shaft through a bearing.
6. The device for preparing an extruded barbed medical suture according to claim 5, characterized in that: The sliding assembly includes a sliding rail, a sliding block and a second shaft seat. A strip boss is provided on the edge of the base plate away from the drive motor. The sliding rail is provided on the strip boss. The sliding block is slidably set on the sliding rail. The second shaft seat is set on the sliding block. The second shaft seat is connected to the other side of the roller shaft through a bearing.
7. The device for preparing an extruded barbed medical suture according to claim 1, characterized in that: The lifting assembly includes a spiral motor, a spiral screw and a guide column. The spiral motor is embedded in the groove on the surface of the base plate through a motor seat. The spiral screw is vertically arranged and connected to the rotating shaft of the spiral motor. The top of the spiral screw is sleeved in the threaded sleeve located at the bottom of the bar workbench; the guide column is vertically arranged with the base plate and sleeved in the through hole in the bottom plate of the bar workbench.
8. The device for preparing an extruded barbed medical suture according to claim 5, characterized in that: The rack platform includes a base and a rack. The base is vertically arranged between the workbench and the screw rod. The rack is located above the base and vertically arranged with respect to the roller shaft. The rack is engaged with the gear.