Anti-deflection artificial blood vessel shaping device

Abstract

The present invention provides a deflection-resistant artificial blood vessel shaping device, wherein the frame is a vertical frame structure; a movable load platform is mounted on the lower layer of the frame; a demolding unit is mounted on the top load platform; a spiral corrugated mold is vertically mounted within the frame, its bottom secured by a rotating pneumatic clamp, and its top passes through the frame, allowing the spiral corrugated mold to move up and down synchronously with the top load platform; a winding unit is mounted on the upper layer of the frame, driving the yarn to complete the winding of the rough artificial blood vessel on the spiral corrugated mold; a deflection suppression unit is provided with a movable mechanical clamp that clamps the bottom of the rough artificial blood vessel on the spiral corrugated mold to prevent the rough artificial blood vessel from deflecting during the yarn winding process. This device can prevent deflection of the artificial blood vessel during yarn winding, thereby reducing the defective rate and improving the consistency of the artificial blood vessel produced. The device can also achieve automatic demolding, thereby improving product production efficiency and reducing labor intensity.

Description

Technical Field

[0001] The invention relates to the technical field of artificial blood vessel preparation, and in particular to an anti-deflection artificial blood vessel shaping device. Background Art

[0002] Artificial blood vessels have become one of the preferred treatment options for many diseases. However, the main reason why artificial blood vessels are difficult to promote in China is that the products have a certain degree of bleeding, which will occur after a period of use. Threaded artificial blood vessels can improve the support, elasticity, and flexibility of the blood vessels. In order to solve the problem of postoperative bleeding, how to make the surface waveform of the artificial blood vessels uniform is a problem. Currently, there are two main artificial blood vessel shaping processes. One is to directly use a mold to hot-press the rough artificial blood vessels into a threaded shape. Although this process has high production efficiency, it can easily cause the surface of the artificial blood vessels to be uneven and uneven. The other is to put the rough artificial blood vessel on a spiral corrugated mold, and then wrap yarn around the rough artificial blood vessel. After wrapping is completed, the whole blood vessel is thermoformed. In this process, the yarn winding is currently done manually. The preparation personnel need to be proficient in the strength of the yarn when winding to ensure that each circle of yarn is wrapped into the deepest part of the spiral corrugated structure of the mold during the winding process, so that each circle of the corrugated structure of the produced blood vessel has the same depth and consistency. Although there are some mechanical devices in the field that can automatically wind yarns, such as the shaping method and device for preparing threaded artificial blood vessels disclosed in patent CN 117656439 A, the existing devices have not been able to effectively solve the problem of deflection of the fabric caused by the force of the yarn during the winding process, resulting in poor consistency of the blood vessels produced. At the same time, after the wound mold is placed in the oven for heat setting, the fabric needs to be manually demolded. The demolding process is time-consuming and labor-intensive, and due to human factors, the mold can easily cause the inside of the fabric to be cut. Therefore, the artificial blood vessel shaping process is relatively complex, the production efficiency is low, and due to human factors, the quality of the products produced is inconsistent, with a high defective rate, which has become a difficult problem that needs to be solved in the field. Summary of the Invention

[0003] The present invention provides a deflection-resistant artificial blood vessel shaping device that addresses the shortcomings of the prior art. The device prevents deflection of the artificial blood vessel during yarn winding, resulting in a low defective rate and high consistency of the artificial blood vessel. The device also enables automatic demolding, thereby improving production efficiency and reducing labor intensity.

[0004] The technical solution adopted to achieve the above-mentioned purpose of the present invention is:

[0005] An anti-deflection artificial blood vessel shaping device comprises at least a frame, a winding unit, and a spiral corrugated mold. The anti-deflection artificial blood vessel shaping device comprises:

[0006] The rack is a vertical frame structure;

[0007] The movable load platform is installed on the lower layer of the rack, and its top load-bearing platform can move up and down in the rack;

[0008] The demoulding unit, mounted on the top load-bearing platform, includes a rotating pneumatic gripper;

[0009] The spiral corrugated die is installed vertically in the frame, with its bottom fixed by a rotating pneumatic clamp and its top passing through the frame. The spiral corrugated die moves up and down synchronously with the top load-bearing platform;

[0010] The winding unit is installed on the upper layer of the frame. It is annular in shape and is placed on the spiral corrugation mold. It drives the yarn to complete the winding of the rough artificial blood vessel on the spiral corrugation mold. During the winding process, the spiral corrugation mold moves upward.

[0011] The deflection suppression unit is installed on one side of the frame and can move up and down synchronously with the top load-bearing platform in the frame. The deflection suppression unit is provided with a movable mechanical clamp, which clamps the bottom of the rough artificial blood vessel on the spiral corrugated mold to prevent the rough artificial blood vessel from deflecting during the yarn winding process.

[0012] Furthermore, the winding unit includes an annular guide rail, a first stepper motor, a slide, a tension plate and a take-up column. The annular guide rail is fixed to the upper layer of the frame, the spiral corrugation mold passes through the center of the annular guide rail, the slide is installed on the annular guide rail and moves along the annular guide rail, the first stepper motor is installed on the slide to drive the slide to move along the annular guide rail, the tension plate and the take-up column are arranged on the slide, so that the yarn is driven by the slide to move on the annular guide rail under controllable tension to complete the winding, and the yarn outlet direction of the slide is always toward the spiral corrugation mold during the movement of the slide.

[0013] Furthermore, the annular guide rail is composed of two layers, the upper layer is an annular guide rail with inner and outer grooves, and the lower layer is an outer gear ring; the slide includes a slide seat and a driving gear, an inner suspension wheel and an outer suspension wheel installed under the slide seat, and the inner suspension wheel and the outer suspension wheel are respectively installed in the inner and outer grooves of the annular guide rail, and the two together suspend the slide on the annular guide rail, the driving gear is engaged with the outer gear ring, and the output shaft of the first stepper motor is connected to the driving gear, driving the driving gear to move along the outer gear ring.

[0014] Furthermore, the upper part of the spiral corrugated mold is connected to a mold stabilizing column, and the mold stabilizing column is connected to the spiral corrugated mold through a docking groove. The upper part of the mold stabilizing column passes through the top of the frame, and a linear bearing is provided at the part where the top of the frame is connected to the mold stabilizing column, which is used to maintain the overall stability of the spiral corrugated mold when the winding unit is working and reduce the shaping error.

[0015] Furthermore, the deflection suppression unit includes a second stepper motor, a linear guide, a linear guide slide, a retractable bracket and a mechanical clamp. The second stepper motor is connected to the linear guide. The linear guide slide is installed on the screw rod of the linear guide and moves up and down under the drive of the second stepper motor. The retractable bracket is horizontally connected to the linear guide slide and moves up and down synchronously with the linear guide slide. The mechanical clamp is installed and fixed by the retractable bracket and extends and retracts back and forth under the drive of the retractable bracket.

[0016] Furthermore, the demolding unit includes a rotating pneumatic clamp, an air clamp support frame and a third stepper motor. The air clamp support frame and the third stepper motor are arranged on a movable load platform. The rotating pneumatic clamp is arranged on the air clamp support frame and connected to the third stepper motor. The rotating pneumatic clamp drives the spiral corrugated mold to rotate under the drive of the third stepper motor, so that the shaped artificial blood vessel is detached from the spiral corrugated mold.

[0017] Furthermore, the movable load platform includes a top bearing platform, an elevator stabilizing platform, a fourth stepper motor, an elevator load platform, an elevator stabilizing column, a linear bearing, an elevator and a coupling; the elevator stabilizing platform is located between the top bearing platform and the elevator load platform, the elevator stabilizing platform and the elevator load platform are both fixed in the frame, a linear bearing is installed on the elevator stabilizing platform, the upper end of the elevator stabilizing column is fixedly connected to the top bearing platform, the middle part of the elevator stabilizing column passes through the linear bearing on the elevator stabilizing platform, and the linear bearing is used to make the elevator stabilizing column move up and down smoothly; the elevator load platform is used to load the elevator, and the top of the elevator is connected to the top bearing platform through a circular flange, and the fourth stepper motor is connected to the elevator through a coupling and drives it, so that the top bearing platform can be lifted up and down.

[0018] Compared with the prior art, the anti-deflection artificial blood vessel shaping device provided by the present invention has the following advantages:

[0019] The present invention enables the coordinated implementation of multiple process units to complete the artificial blood vessel shaping process. A rough artificial blood vessel is placed in a mold and then placed into the apparatus. The winding unit drives the yarn, and a movable load platform and deflection suppression unit cooperate to achieve tight winding, turn by turn. After winding is complete, the fabric and mold are removed and placed in an oven for heat setting. The fabric is then placed back into the apparatus, and the mold is rotated by the demolding unit, which cooperates with the movable load platform to remove the fabric from the mold. The entire shaping process is highly automated and simple to operate, significantly reducing the time required for yarn winding and fabric demolding, resulting in high efficiency.

[0020] 2. The winding unit of this invention employs a circular winding method, preventing the yarn from being applied in a consistent direction, which could cause deflection in the artificial blood vessel. During operation, the yarn tension is controlled by a tension plate. By maintaining a certain tension, the yarn presses the fabric into the mold's corrugated structure, ensuring a consistent height of the spiral corrugated structure on the surface of the manufactured blood vessel.

[0021] 3. In the present invention, one end of the spiral corrugated mold is fixed by a rotating pneumatic clamp, and the other end is extended with a column to be connected to the stabilizing column in the frame. One end of the stabilizing column is hollow and can be connected to the protruding column of the mold. The linear bearing above the frame is used to maintain the stability of the stabilizing column. When the winding unit starts to wind the spiral corrugated mold, the stabilizing column and the rotating pneumatic clamp can prevent the spiral corrugated mold from shaking greatly, causing the wound yarn to loosen or the yarn to be unable to complete winding circle by circle.

[0022] 4. In order to prevent the artificial blood vessel from being deflected due to the action of the yarn during the winding process, the deflection suppression unit makes the moving speed of the linear guide slide consistent with the movable load platform, so that the mechanical clamp can always clamp at the same position at the bottom of the artificial blood vessel, thereby suppressing the deflection of the artificial blood vessel during the winding process. At the same time, when the winding work of the winding unit is about to be completed, the mechanical clamp will retract through the retractable bracket, so that the yarn can complete the winding of the bottom of the artificial blood vessel.

[0023] 5. After heat setting, the artificial blood vessel forms a spiral corrugated structure. The artificial blood vessel is now like a nut, and the spiral corrugated mold is like a bolt. The demolding process is the process of separating the bolt and nut. To facilitate demolding of the artificial blood vessel after heat setting, the demolding unit rotates the mold via a rotating pneumatic gripper, and the movable load platform moves downward to complete the demolding. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the overall structure of the anti-deflection artificial blood vessel shaping device provided by the present invention;

[0025] Figure 2 It is a structural diagram of the winding unit;

[0026] Figure 3 Schematic diagram of the structure of the spiral corrugated die;

[0027] Figure 4 Schematic diagram of the structure of the deflection suppression unit;

[0028] Figure 5 Schematic diagram of the structure of the demoulding unit;

[0029] Figure 6 It is a structural diagram of the movable load platform;

[0030] In the figure: 1. Frame; 2. Winding unit; 3. Spiral corrugated mold; 4. Deflection suppression unit; 5. Demolding unit; 6. Movable load platform; 7. First stepper motor; 8. Slide; 81. Slide seat; 82. Drive gear; 83. External suspension wheel; 84. Inner suspension wheel; 9. Tension plate; 10. Take-up column; 11. Annular guide rail; 111. Annular slide rail; 112. External gear ring; 12. Mold stabilizing column; 14. Linear guide slide; 15. Second stepper motor; 16. Linear guide; 17. Retractable bracket; 18. Mechanical gripper; 19. Rotating pneumatic gripper; 20. Air gripper support frame; 21. Third stepper motor; 22. Elevator stabilizing platform; 23. Fourth stepper motor; 24. Elevator load platform; 25. Elevator stabilizing column; 26. Linear bearing; 27. Elevator; 28. Coupling; 29. ​​Top load platform. DETAILED DESCRIPTION

[0031] The principles and features of the present invention are described in detail below with reference to the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0032] The present invention provides an anti-deflection artificial blood vessel shaping device, the overall structure of which is as follows: Figure 1 As shown, it includes six components, namely, a frame 1, a winding unit 2, a spiral corrugation mold 3, a movable load platform 6, a demoulding unit 5, and a deflection suppression unit 4. The frame 1 adopts a vertical frame structure with multiple layers inside.

[0033] The movable load platform 6 is installed on the lower layer of the frame, and its structure is as follows: Figure 1 and Figure 6 The movable load platform includes a top bearing platform 29, an elevator stabilizing platform 22, a fourth stepper motor 23, an elevator load platform 24, an elevator stabilizing column 25, a linear bearing 26, an elevator 27 and a coupling 28; the top bearing platform 29 can move up and down in the frame 1; the elevator stabilizing platform 22 is located between the top bearing platform 29 and the elevator load platform 24, the elevator stabilizing platform and the elevator load platform are both fixed in the frame, a linear bearing is installed on the elevator stabilizing platform, the upper end of the elevator stabilizing column is fixedly connected to the top bearing platform, the middle part of the elevator stabilizing column passes through the linear bearing on the elevator stabilizing platform, and the linear bearing is used to make the elevator stabilizing column move up and down smoothly; the elevator load platform is used to load the elevator, the top of the elevator is connected to the top bearing platform through a circular flange, the fourth stepper motor is connected to the elevator through a coupling and drives it, the elevator moves up and down, thereby making the top bearing platform move up and down.

[0034] The demoulding unit 5 is installed on the top bearing platform, and its structure is as follows: Figure 1 and Figure 5As shown; the demoulding unit 5 includes a rotating pneumatic clamp 19, an air clamp support frame 20 and a third stepper motor 21. The air clamp support frame 20 and the third stepper motor 21 are arranged on the top load platform 29 on the movable load platform. The rotating pneumatic clamp 19 is arranged on the air clamp support frame and is connected to the third stepper motor. The rotating pneumatic clamp 19 drives the spiral corrugated mold 3 to rotate under the drive of the third stepper motor, so that the shaped artificial blood vessel is separated from the spiral corrugated mold.

[0035] The structure of the spiral corrugated die 3 is as follows Figure 3 As shown, it is vertically installed in the frame, its bottom is fixed by a rotating pneumatic clamp 19, and its top passes through the frame 1. The spiral corrugated mold 3 moves up and down synchronously with the top bearing platform 29; the upper part of the spiral corrugated mold is connected with a mold stabilizing column 12, and the mold stabilizing column 12 is connected to the spiral corrugated mold 3 through a docking groove. The upper part of the mold stabilizing column 12 passes through the top of the frame 1, and a linear bearing is provided at the part where the top of the frame is connected to the mold stabilizing column, which is used to keep the spiral corrugated mold as a whole stably rising when the winding unit is working, thereby reducing the shaping error.

[0036] The winding unit 2 is installed on the upper layer of the frame, and its structure is as follows Figure 1 and Figure 2 As shown. The winding unit 2 is annular as a whole and is mounted on the spiral corrugation mold 3, driving the yarn to complete the winding of the rough artificial blood vessel on the spiral corrugation mold 3. During the winding process, the spiral corrugation mold 3 moves upward. The winding unit 2 includes an annular guide rail 11, a first stepper motor 7, a slide 8, a tension plate 9 and a take-up column 10. The annular guide rail 11 is fixed to the upper layer of the frame 1. The spiral corrugation mold 3 passes through the center of the annular guide rail 11. The slide 8 is installed on the annular guide rail 11 and moves along the annular guide rail 11. The first stepper motor 7 is installed on the slide 8 to drive the slide 8 to move along the annular guide rail 11. The tension plate 9 and the take-up column 10 are arranged on the slide 8, so that the yarn is driven by the slide to move on the annular guide rail under controllable tension to complete the winding. During the movement of the slide, the yarn outlet direction is always toward the spiral corrugation mold. The annular guide rail 11 consists of two layers, the upper layer is an annular guide rail 111 with inner and outer grooves, and the lower layer is an outer gear ring 112; the slide 8 includes a slide seat 81 and a driving gear 82, an inner suspension wheel 84 and an outer suspension wheel 83 installed under the slide seat 81, and the inner suspension wheel 84 and the outer suspension wheel 83 are respectively installed in the inner and outer grooves of the annular guide rail 111, and the two together suspend the slide 8 on the annular guide rail, the driving gear 82 is engaged with the outer gear ring 112, and the output shaft of the first stepper motor 7 is connected to the driving gear 82, driving the driving gear to move along the outer gear ring.

[0037] The structure of the deflection suppression unit 4 is as follows Figure 1 and Figure 4As shown, it is mounted on one side of the frame and can move up and down within the frame 1 synchronously with the top support platform 29. The deflection suppression unit 4 specifically includes a second stepper motor 15, a linear guide 16, a linear guide slide 14, a retractable bracket 17, and a mechanical gripper 18. The second stepper motor 15 is connected to the linear guide 16. The linear guide slide 14 is mounted on the lead screw of the linear guide 16 and moves up and down driven by the second stepper motor 15. The retractable bracket 17 is connected to the linear guide slide 14 and moves up and down synchronously with the linear guide slide. The mechanical gripper 18 is fixed by the retractable bracket 17 and is driven by the retractable bracket 17 to extend and retract forward and backward. The deflection suppression unit is equipped with a movable mechanical gripper that clamps the bottom of the rough artificial blood vessel on the spiral corrugation mold 3 to prevent the rough artificial blood vessel from deflecting during the yarn winding process.

[0038] The deflection-resistant artificial blood vessel shaping device provided by the present invention operates as follows: First, a rough artificial blood vessel to be shaped is placed on a spiral corrugated die. Then, a mechanical clamp in a deflection suppression unit clamps the bottom of the rough artificial blood vessel on the spiral corrugated die. The winding unit is then activated, and the yarn on the take-up column is wound on a circular guide rail driven by a first stepper motor. During the winding process, the movable load platform and the deflection suppression unit are also activated simultaneously. The top load platform of the movable load platform pushes the spiral corrugated die upward at a speed that matches the yarn winding speed. Specifically, after one yarn winding cycle is completed, the spiral corrugated die moves upward by exactly one pitch. Simultaneously, the linear guide slide in the deflection suppression unit also moves the same distance on the linear guide rail. Following this operating method, the yarn is wound on the rough artificial blood vessel. During the winding process, the mechanical clamp clamps the bottom of the rough artificial blood vessel on the spiral corrugated die to prevent deflection of the rough artificial blood vessel during the yarn winding process. When the yarn winding is nearly complete, the mechanical gripper, driven by a retractable support, retracts, allowing the yarn to continue wrapping around the base of the rough artificial blood vessel. Once the winding process is complete, the spiral corrugated mold is removed and heat-set. After heat-setting, the artificial blood vessel forms a spiral corrugated structure. The spiral corrugated mold is then returned to the frame and clamped securely with the rotating pneumatic gripper in the demolding unit. At this point, the artificial blood vessel resembles a nut, and the spiral corrugated mold is like a bolt. The demolding process is the process of separating the bolt and nut. The demolding unit rotates the mold using the rotating pneumatic gripper, while the movable load platform cooperates to move the spiral corrugated mold downward to complete the demolding process, thus completing the artificial blood vessel's shaping process.

Claims

1. A deflection-resistant artificial blood vessel shaping device comprising at least a frame, a winding unit, and a spiral corrugated mold, characterized in that: The anti-deflection artificial blood vessel shaping device comprises: The rack is a vertical frame structure; The movable load platform is installed on the lower layer of the rack, and its top load-bearing platform can move up and down in the rack; A demolding unit is mounted on the top load platform and includes a rotating pneumatic gripper, an air gripper support frame, and a third stepper motor. The air gripper support frame and the third stepper motor are mounted on the movable load platform. The rotating pneumatic gripper is mounted on the air gripper support frame and connected to the third stepper motor. The rotating pneumatic gripper, driven by the third stepper motor, rotates the spiral corrugated mold, thereby separating the shaped artificial blood vessel from the spiral corrugated mold. The spiral corrugated die is installed vertically in the frame, with its bottom fixed by a rotating pneumatic clamp and its top passing through the frame. The spiral corrugated die moves up and down synchronously with the top load-bearing platform; The winding unit is installed on the upper layer of the frame. It is annular in shape and is placed on the spiral corrugation mold. It drives the yarn to complete the winding of the rough artificial blood vessel on the spiral corrugation mold. During the winding process, the spiral corrugation mold moves upward. A deflection suppression unit is installed on one side of the frame and can move up and down synchronously with the top load-bearing platform in the frame. The deflection suppression unit includes a second stepper motor, a linear guide, a linear guide slide, a retractable bracket and a mechanical clamp. The second stepper motor is connected to the linear guide. The linear guide slide is installed on the screw rod of the linear guide and moves up and down under the drive of the second stepper motor. The retractable bracket is horizontally connected to the linear guide slide and moves up and down synchronously with the linear guide slide. The mechanical clamp is fixed by the retractable bracket and extends and retracts back and forth under the drive of the retractable bracket. A movable mechanical clamp is provided in the deflection suppression unit, which clamps the bottom of the rough artificial blood vessel on the spiral corrugated mold to prevent the rough artificial blood vessel from deflecting during the yarn winding process.

2. The anti-deflection artificial blood vessel shaping device according to claim 1, characterized in that: The winding unit includes an annular guide rail, a first stepper motor, a slide, a tension plate and a take-up column. The annular guide rail is fixed to the upper layer of the frame, the spiral corrugation mold passes through the center of the annular guide rail, the slide is installed on the annular guide rail and moves along the annular guide rail, the first stepper motor is installed on the slide to drive the slide to move along the annular guide rail, the tension plate and the take-up column are arranged on the slide, so that the yarn is driven by the slide to move on the annular guide rail under controllable tension to complete the winding, and the yarn outlet direction of the slide is always toward the spiral corrugation mold during the movement.

3. The anti-deflection artificial blood vessel shaping device according to claim 2, characterized in that: The annular guide rail is composed of two layers, the upper layer is an annular guide rail with inner and outer grooves, and the lower layer is an outer gear ring; the slide includes a slide seat and a driving gear, an inner suspension wheel and an outer suspension wheel installed under the slide seat, the inner suspension wheel and the outer suspension wheel are respectively installed in the inner and outer grooves of the annular guide rail, and the two together suspend the slide on the annular guide rail, the driving gear is engaged with the outer gear ring, and the output shaft of the first stepper motor is connected to the driving gear, driving the driving gear to move along the outer gear ring.

4. The anti-deflection artificial blood vessel shaping device according to claim 1, characterized in that: The upper part of the spiral corrugation mold is connected to a mold stabilizing column, and the mold stabilizing column is connected to the spiral corrugation mold through a docking groove. The upper part of the mold stabilizing column passes through the top of the frame, and a linear bearing is provided at the part where the top of the frame is connected to the mold stabilizing column, which is used to keep the spiral corrugation mold as a whole stable when the winding unit is working and reduce the shaping error.

5. The anti-deflection artificial blood vessel shaping device according to claim 1, characterized in that: The movable load platform includes a top bearing platform, an elevator stabilizing platform, a fourth stepper motor, an elevator load platform, an elevator stabilizing column, a linear bearing, an elevator and a coupling; the elevator stabilizing platform is located between the top bearing platform and the elevator load platform, the elevator stabilizing platform and the elevator load platform are both fixed in the frame, a linear bearing is installed on the elevator stabilizing platform, the upper end of the elevator stabilizing column is fixedly connected to the top bearing platform, the middle part of the elevator stabilizing column passes through the linear bearing on the elevator stabilizing platform, and the linear bearing is used to make the elevator stabilizing column move up and down smoothly; the elevator load platform is used to load the elevator, and the top of the elevator is connected to the top bearing platform through a circular flange. The fourth stepper motor is connected to the elevator through a coupling and drives it, so that the top bearing platform can be lifted up and down.

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