Drainage catheter melting head forming device

Abstract

The utility model discloses a drainage catheter melting head forming device which comprises a base, a translation driving mechanism, a mold base, a core needle base and a core needle. The translation driving mechanism is arranged on the base. The mold base is arranged on the base and located at the end, in the translation direction, of the translation driving mechanism. And the core needle seat is in transmission connection with the translation driving mechanism. The core needle is provided with a large-diameter body and a small-diameter body, the large-diameter body is connected to the core needle base, the small-diameter body is connected to one end of the large-diameter body, and a reinforcing core limiting table is formed between the large-diameter body and the small-diameter body. The translation driving mechanism can drive the core needle base to drive the core needle to get close to or away from the mold base. According to the drainage catheter head melting forming device, in the drainage catheter head melting process, one end of the reinforcing core can abut against the limiting table, the translation driving mechanism drives the core needle base to move horizontally to be close to the mold base, and when the head end of a catheter is pushed into a heated mold, the limiting table limits the reinforcing core to move backwards in the axial direction; and the end part of the produced drainage catheter is good in structural hardness, good in product quality stability and few in defective products.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field, concretely relates to a drainage catheter fuse head forming device. BACKGROUND

[0002] Drainage catheter is a kind of medical auxiliary equipment, mainly used in postoperative or specific medical process, the liquid (such as blood, pus, exudate etc.) or gas accumulated in body is guided to outside, to promote the healing, prevent infection.Drainage catheter intervention operation needs to be made into the catheter with taper and the taper is hardened, to facilitate through the skin and extend into the patient's body, reduce the harm to the patient.During the production of this kind of drainage catheter, first, the catheter with straight ends is made, then a short straight reinforcing core is made, the hardness of reinforcing core is higher than that of catheter, and then the sharp head of pipe end is made by using drainage catheter fuse head equipment.

[0003] Drainage catheter fuse head equipment includes base, translation drive mechanism, mould seat, core needle seat and core needle.The translation drive mechanism is arranged on the base, the mould seat is arranged on the base, and the mould seat is located at one end of the translation drive mechanism along the translation direction.The core needle seat and the translation drive mechanism are in transmission connection, and the core needle is an elongated needle body.The translation drive mechanism can drive the core needle seat to drive the core needle to approach or move away from the mould seat.

[0004] In the process of drainage catheter fuse head, the mould on the mould seat is usually heated, then the reinforcing core is inserted into the catheter, the catheter with reinforcing core is sleeved on the core needle, and then the translation drive mechanism is started to drive the core needle seat to translate and approach the mould seat, so that the head end of the catheter is pushed into the heated mould, the heating makes the head end of the catheter and the reinforcing core covered into one, and the reinforcing core is not exposed and formed into a sharp taper shape.Because there is no limiting or fixed structure between the reinforcing core and the catheter, when the catheter with reinforcing core is pushed into the mould and heated, the reinforcing core may appear the risk of axial retreat walking on one side of the end of the catheter, the stability of the processing process is poor, the hardness of the end structure of the produced drainage catheter is poor, and the defective products are many.

[0005] Therefore, the utility model is provided. UTILITY MODEL CONTENT

[0006] To solve one of the above technical defects, the utility model provides a drainage catheter fuse head forming device.

[0007] The application provides the following technical scheme:

[0008] A drainage catheter fuse head forming device comprises:

[0009] Base;

[0010] Translation drive mechanism, the translation drive mechanism is arranged on the base;

[0011] a mold base arranged on the base, the mold base being located at one end of the translation driving mechanism along the translation direction;

[0012] a core pin base drivingly connected with the translation driving mechanism;

[0013] a core pin having a thick diameter body and a thin diameter body, the thick diameter body being connected with the core pin base, the thin diameter body being connected with one end of the thick diameter body, and a reinforcing core limiting platform being formed between the thick diameter body and the thin diameter body;

[0014] the translation driving mechanism being capable of driving the core pin base to drive the core pin to approach or move away from the mold base.

[0015] Optionally, the thick diameter body is provided with a tapered section at one end close to the thin diameter body;

[0016] in the direction from the thin diameter body to the thick diameter body, the outer diameter of the tapered section gradually increases.

[0017] Optionally, the core pin base has a main base body, a buffer base and an elastic support base;

[0018] the main base body being drivingly connected with the translation driving mechanism;

[0019] the buffer base being slidably arranged on the main base body, the elastic support base being arranged on the main base body, the elastic support base being located at the side of the buffer base away from the mold base, and the elastic support base being elastically abutted against the buffer base;

[0020] the thick diameter body of the core pin being fixed on the buffer base.

[0021] Optionally, a guide rail is arranged on the main base body, the guide rail extending along the translation direction of the translation driving mechanism;

[0022] a sliding block is arranged on the buffer base;

[0023] the sliding block being slidably connected with the guide rail.

[0024] Optionally, the elastic support base comprises a base frame and an elastic component;

[0025] the base frame being fixed at one end of the main base body away from the mold base;

[0026] the elastic component having two ends respectively abutting against the base frame and the buffer base.

[0027] Optionally, the buffer base has a receiving groove;

[0028] The elastic supporting seat comprises a guide fixed to the seat frame, which extends into the accommodating groove;

[0029] The elastic component is sleeved on the guide;

[0030] One end of the elastic component abuts against the guide, and the other end of the elastic component is accommodated in the accommodating groove and abuts against the buffer seat.

[0031] Optionally, the drainage catheter melt head forming device comprises a fixing assembly;

[0032] The fixing assembly is arranged at one end of the main seat body close to the mold seat;

[0033] The fixing assembly has a clamp for clamping or releasing the core needle and the pipe body sleeved on the core needle.

[0034] Optionally, the mold seat has an end plate, a melt head component and a heating component;

[0035] The end plate is fixed to the base;

[0036] The melt head component is arranged on the end plate, and the melt head component has a through vertebral cavity;

[0037] The heating component is arranged on the end plate, and the heating component can be sleeved on the melt head component.

[0038] Optionally, the drainage catheter melt head forming device comprises a driving component, a first gear and a second gear;

[0039] The melt head component is rotatably arranged on the end plate, and the first gear is connected to the melt head component;

[0040] The second gear is rotatably connected to the end plate, and the second gear and the first gear are engaged;

[0041] The driving component is arranged on the end plate, and the driving component is connected to the second gear.

[0042] Optionally, the translation driving mechanism comprises a main body, a motor and a lead screw;

[0043] The motor is arranged at one end of the main body, and the lead screw is rotatably arranged on the main body;

[0044] The core needle seat is threadedly connected to the lead screw, and the core needle seat is slidably connected to the main body;

[0045] The motor and the lead screw are in transmission connection, driving the lead screw to rotate to drive the core needle seat to translate along the main body.

[0046] By adopting the technical scheme, the application has the following beneficial effects:

[0047] The drainage catheter fusion head forming device of the application can make one end of the reinforcing core abut against the limiting table in the drainage catheter fusion head process, the core needle seat is driven to translate and approach the mold seat by the translation driving mechanism, and the limiting table limits the axial backward movement of the reinforcing core when the head end of the catheter is pushed into the mold which has been heated, so that the end head structure of the produced drainage catheter has good hardness, the product quality has good stability, and the defective products are few. BRIEF DESCRIPTION OF DRAWINGS

[0048] The accompanying drawings are part of the present application and serve to provide a further understanding of the present application, the illustrative embodiments of the present application and the description thereof serve to explain the present application, but do not constitute an improper limitation on the present application. Obviously, the drawings described below are only some embodiments, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0049] Figure 1 The structure schematic view of the drainage catheter fusion head forming device provided by the embodiment of the present application is shown in the figure.

[0050] Figure 2 The other view of the drainage catheter fusion head forming device provided by the embodiment of the present application is shown in the figure.

[0051] Figure 3 The structure schematic view of the core needle seat, the core needle and the fixing assembly of the drainage catheter fusion head forming device provided by the embodiment of the present application is shown in the figure. Figure 1 The enlarged view of A in the figure.

[0052] Figure 4 The structure schematic view of the end of the core needle of the drainage catheter fusion head forming device provided by the embodiment of the present application is shown in the figure.

[0053] Figure 5 The structure schematic view of the end of the core needle of the drainage catheter fusion head forming device provided by the embodiment of the present application is shown in the figure.

[0054] Figure 6 The structure schematic view of the main seat body of the drainage catheter fusion head forming device provided by the embodiment of the present application is shown in the figure.

[0055] Figure 7 The structure schematic view of the buffer seat of the drainage catheter fusion head forming device provided by the embodiment of the present application is shown in the figure.

[0056] Figure 8 The structure schematic view of the clamp jaw of the drainage catheter fusion head forming device provided by the embodiment of the present application is shown in the figure.

[0057] In the figure: base 1, translation driving mechanism 2, main body part 21, motor 22, speed reducer 23, connecting shaft 24, mold base 3, end plate 31, melting head piece 32, heating piece 33, core needle base 4, main base body 41, guide rail 411, buffer base 42, sliding block 421, containing groove 422, elastic support base 43, seat frame 431, elastic component 432, guide 433, cap body 4331, stud segment 4332, guide column 4333, core needle 5, coarse diameter body 51, cone segment 511, fine diameter body 52, limiting table 53, fixed assembly 6, finger air cylinder 61, sliding groove 611, sliding block 62, clamp 63, clamping jaw 631, clamping notch 6311, driving piece 7, first gear 8, second gear 9. DETAILED DESCRIPTION

[0058] In order to make the purpose, technical scheme and advantages of the embodiments of the present disclosure clearer, the technical scheme in the embodiments will be described clearly and completely below in conjunction with the drawings in the embodiments of the present disclosure. The following embodiments are used to illustrate the present application, but not to limit the scope of the present application.

[0059] In the description of the present application, it should be pointed out that the positions or location relationships indicated by the terms "upper", "lower", "inner", "outer" and the like are based on the positions or location relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as limiting the devices or elements indicated to have a specific position, to be constructed and operated in a specific position, and therefore cannot be understood as limiting the present application.

[0060] In the description of the present application, it should be pointed out that, unless otherwise explicitly specified and limited, the terms "mounting", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0061] Reference should be made to Figures 1 to 8As shown, the present disclosure provides a drainage catheter melt head forming device, which comprises a base 1, a translation driving mechanism 2, a mold seat 3, a core needle seat 4 and a core needle 5. The translation driving mechanism 2 is arranged on the base 1. The mold seat 3 is arranged on the base 1, and the mold seat 3 is located at one end of the translation driving mechanism 2 in the translation direction. The core needle seat 4 is in transmission connection with the translation driving mechanism 2. The core needle 5 has a thick diameter body 51 and a thin diameter body 52, the thick diameter body 51 is connected to the core needle seat 4, the thin diameter body 52 is connected to one end of the thick diameter body 51, and a reinforcing core limiting table 53 is formed between the thick diameter body 51 and the thin diameter body 52. The translation driving mechanism 2 can drive the core needle seat 4 to move the core needle 5 close to or away from the mold seat 3. The cross-sectional diameter of the reinforcing core is between the cross-sectional diameters of the thin diameter body 52 and the thick diameter body 51, which ensures that the reinforcing core can be sleeved on the thin diameter body 52, and one end of the reinforcing core can abut against the limiting table 53. The core needle 5 of the drainage catheter melt head forming device of the present application has a thick diameter body 51 and a thin diameter body 52, and a reinforcing core limiting table 53 is formed between the thick diameter body 51 and the thin diameter body 52. In the drainage catheter melt head forming process, the reinforcing core can be sleeved on the thin diameter body 52, and one end of the reinforcing core can abut against the limiting table 53. When the translation driving mechanism 2 drives the core needle seat 4 to translate and move close to the mold seat 3, the limiting table 53 limits the axial back movement of the reinforcing core, so that the end structure of the produced drainage catheter has good hardness, the stability of the processing process is good, the quality of the produced product is stable, and the defective products are few.

[0062] As shown, Figure 5 The thick diameter body 51 is provided with a tapered section 511 at one end close to the thin diameter body 52. In the direction from the thin diameter body 52 to the thick diameter body 51, the outer diameter of the tapered section 511 gradually increases. In the drainage catheter melt head forming process, the catheter can be sleeved on the core needle 5 first, and then the reinforcing core is installed and sleeved on the thin diameter body 52, and one end of the reinforcing core abuts against the limiting table 53, so that the position between the reinforcing core and the catheter is fixed. When the core needle 5 with the reinforcing core and the catheter is pushed into the mold in the mold seat 3, the tapered section 511 plays a role of internal support, so that the catheter and the reinforcing core are integrally formed into a sharp conical shape, the tapered section 511 has a good effect of forming a conical surface.

[0063] In a possible implementation, as shown, Figure 1 , Figure 2 and Figure 4As shown in the drawings, the core needle seat 4 has a main seat body 41, a buffer seat 42 and an elastic support seat 43, the main seat body 41 is drivingly connected to the translation driving mechanism 2. The buffer seat 42 is slidably arranged on the main seat body 41, the elastic support seat 43 is arranged on the main seat body 41, the elastic support seat 43 is located on the side of the buffer seat 42 away from the mold seat 3, and the elastic support seat 43 elastically abuts against the buffer seat 42. The thick diameter body 51 of the core needle 5 is fixed on the buffer seat 42. When the translation driving mechanism 2 drives the core needle seat 4 to drive the core needle 5 to approach the mold seat 3, the core needle 5 may not be accurately aligned, at this time, the core needle 5 abuts against the mold seat 3, and there is a counterforce to the side of the elastic support seat 43, the buffer seat 42 and the elastic support seat 43 are elastically matched, so that the counterforce is buffered, if the buffer seat 42 and the elastic support seat 43 are not arranged, the core needle 5 may be damaged, affecting the normal operation of the equipment.

[0064] As shown in the drawings, Figure 4 , Figure 6 and Figure 7 , the main seat body 41 is provided with a guide rail 411, the guide rail 411 extends along the translation direction of the translation driving mechanism, the buffer seat 42 is provided with a sliding block 421, and the sliding block 421 is slidably connected to the guide rail 411. When the core needle 5 cannot be accurately aligned, the core needle 5 has a counterforce to the side of the elastic support seat 43, the counterforce drives the buffer seat 42 to slide along the guide rail 411 and press the elastic support seat 43.

[0065] As shown in the drawings, Figure 4 , the elastic support seat 43 includes a seat frame 431 and an elastic component 432, the seat frame 431 is fixed to one end of the main seat body 41 away from the mold seat 3, and the elastic component 432 abuts against the seat frame 431 and the buffer seat 42 at both ends respectively. The elastic component 432 can be a spring.

[0066] As shown in the drawings, Figure 2 , Figure 4 and Figure 7As shown, the buffer seat 42 has a receiving groove 422, the elastic support seat 43 includes a guide piece 433 fixed to the seat frame 431, the guide piece 433 extends into the receiving groove 422, and the elastic component 432 is sleeved on the guide piece 433. One end of the elastic component 432 abuts against the guide piece 433, the other end of the elastic component 432 is accommodated in the receiving groove 422 and abuts against the buffer seat 42. The receiving groove 422 plays a positioning role on the elastic component 432, preventing the end of the elastic component 432 from being inclined outward. The guide piece 433 includes a cap body 4331, a stud segment 4332 and a guide column 4333. The cap body 4331 is connected to the stud segment 4332, and the guide column 4333 is connected to the stud end. Threaded grooves are arranged on the seat frame 431, the guide piece 433 penetrates through the threaded grooves, and the stud segment 4332 is threadedly connected to the threaded grooves. A step is formed between the stud segment 4332 and the guide column 4333, the elastic component 432 is sleeved on the guide column 4333, and the two ends of the elastic component 432 abut against the step and the receiving groove 422. By rotating the cap body 4331, the distance between the buffer seat 42 and the seat frame 431 can be adjusted, so that the size of the elastic force between the buffer seat 42 and the seat frame 431 can be adjusted.

[0067] In one possible implementation, as Figure 1 、 Figure 4 and Figure 8As shown, the drainage catheter melt head forming device comprises a fixing assembly 6. The fixing assembly 6 is arranged on the main base body 41 near one end of the mold base 3. The fixing assembly 6 has a clamp 63 for clamping or releasing the core needle 5 and the pipe body sleeved on the core needle 5. The fixing assembly 6 comprises a finger air cylinder 61, two sliding blocks 62 and the clamp 63. The finger air cylinder 61 is connected to the main base body 41. The finger air cylinder 61 is provided with a sliding groove 611. The two sliding blocks 62 are slidably arranged in the sliding groove 611. The clamp 63 comprises two clamping jaws 631. The two clamping jaws 631 are respectively connected to the corresponding sliding blocks 62. The finger air cylinder 61 drives the two sliding blocks 62 to drive the two clamping jaws 631 to approach each other or to move away from each other in the opposite direction, so as to perform clamping or releasing action. One end of the core needle 5 is connected to the core needle base 4. The other end of the core needle 5 is a suspended end. The suspended end is easily inclined downward under the action of gravity, which affects the smooth passing of the core needle 5 through the mold base 3. The clamp 63 clamps the suspended end of the core needle 5, so that the core needle 5 can always maintain a horizontal shape and be easily aligned with the mold base 3. The clamping notches 6311 are arranged on the side of the two clamping jaws 631 facing each other. In the state that the two sliding blocks 62 approach each other, the clamping notches 6311 on the two clamping jaws 631 are connected to form a bayonet. The bayonet is used to clamp the outer wall of the catheter on the core needle 5.

[0068] In a possible implementation, as shown in Figure 1 and Figure 3 As shown, the mold base 3 has an end plate 31, a melt head piece 32 and a heating piece 33. The end plate 31 is fixed on the base 1. The melt head piece 32 is arranged on the end plate 31. The melt head piece 32 has a through vertebra cavity. The heating piece 33 is arranged on the end plate 31. The heating piece 33 can be sleeved on the melt head piece 32. The translation driving mechanism 2 can drive the core needle base 4 to drive the core needle 5 to approach the mold base 3. The core needle 5 with the pipe body sleeved on the core needle 5 enters the vertebra cavity. The vertebra cavity is beneficial to form a tapered shape at the outer wall end of the pipe body on the core needle 5. Under the action of the heating piece 33, the pipe body and the reinforcing core are fused into a sharp cone shape.

[0069] In a possible implementation, as shown in Figure 1 and Figure 2As shown, the drainage catheter melt head forming device comprises a driving member 7, a first gear 8 and a second gear 9. The melt head member 32 is rotatably arranged on the end plate 31, and the first gear 8 is connected to the melt head member 32. The second gear 9 is rotatably connected to the end plate 31, and the second gear 9 and the first gear 8 are engaged. The driving member 7 is arranged on the end plate 31, and the driving member 7 is connected to the second gear 9. The driving member 7 can drive the second gear 9 to rotate, thereby driving the first gear 8 to rotate, and further driving the melt head member 32 to rotate. The rotation of the melt head member 32 uniformly heats the end of the pipe body sleeved on the core needle 5, and the quality of the formed product is good.

[0070] In one possible embodiment, as shown in Figure 1 and Figure 2 As shown, the translation driving mechanism 2 comprises a main body 21, a motor 22 and a lead screw. The motor 22 is arranged at one end of the main body 21, and the lead screw is rotatably arranged in the main body 21. The core needle seat 4 is threadedly connected to the lead screw, and the core needle seat 4 is slidably connected to the main body 21. The motor 22 and the lead screw are in transmission connection, driving the lead screw to rotate to drive the core needle seat 4 to translate along the main body 21. The main seat body 41 of the core needle seat 4 is threadedly connected to the lead screw, and the lead screw is arranged inside the main body 21. The translation driving mechanism 2 can further comprise a speed reducer 23 and a connecting shaft 24. The input end of the speed reducer 23 is connected to the motor 22, the output end of the speed reducer 23 is connected to the connecting shaft 24, and the connecting shaft 24 is connected to the lead screw. The motor 22 operates in sequence to drive the speed reducer 23, the connecting shaft 24 and the lead screw to move, thereby moving the core needle seat 4 connected to the lead screw along the length direction of the lead screw to drive the core needle seat 4 to drive the core needle 5 to approach or move away from the mold seat 3.

[0071] In the process of the drainage catheter melt head, the catheter wall is thin and soft, and the axial support force of the whole catheter is small, so the heat of the mold is transferred to the catheter and then transferred outward along the catheter, so that the catheter in the tapered cavity is softened. In this process, since the axial support force of the catheter is already weak, and the axial support force of the catheter is further reduced after the catheter is softened, when the pressure is applied to push the catheter into the mold seat 3, although the catheter can be slowly formed, the catheter can be formed in the exposed part of the mold, and the reinforcing core is wrapped inside, and the temperature is not raised in time, which can cause the reinforcing core to be not formed, the reinforcing core to be not hot-melted, the catheter to be wrinkled, and the reinforcing core to be out of position. In view of the above situation, the drainage catheter melt head forming device of the present application can be used to preheat the reinforcing core before the drainage catheter melt head forming operation, then sequentially sleeve the catheter and the reinforcing core, and then send the catheter into the mold seat 3 for hot-melt forming, and then automatically exit and reset after completion. The reinforcing core is preheated, the temperature of the catheter and the reinforcing core is balanced during work, so that the catheter and the reinforcing core can be quickly fused together, the hot-melt effect is good, and the conditions such as the reinforcing core not being formed, the catheter being wrinkled, and the reinforcing core being out of position are avoided.

[0072] The preferred embodiments of the present application disclosed above are only used to help explain the present application. The preferred embodiments do not describe all the details and do not limit the present application to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of the present application. The present application selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present application, so that those skilled in the art can well understand and utilize the present application. The present application is limited by the claims and their entire scope and equivalents.

Claims

1. A melt head forming device for a drainage catheter, characterized in that, The utility model relates to a kind of core needle positioning device, including: Base; Translation drive mechanism, the translation drive mechanism is arranged in the base; Mold base, the mold base is arranged in the base, and the mold base is located in the end of the translation drive mechanism along the translation direction; Needle base, the needle base is drivingly connected with the translation drive mechanism; Needle, the needle has thick diameter body and thin diameter body, the thick diameter body is connected to the needle base, the thin diameter body is connected to the end of the thick diameter body, and the thick diameter body and thin diameter body form reinforcing core limiting platform between them; The translation drive mechanism can drive the needle base to drive the needle to approach or away from the mold base.

2. The drainage catheter melt head forming device of claim 1, wherein, The thick diameter body is provided with a cone section at the end close to the thin diameter body; In the direction from the thin diameter body to thick diameter body, the outer diameter of the cone section gradually increases.

3. The drainage catheter melt head forming apparatus of claim 1, wherein, The needle base has main seat, buffer seat and elastic support seat; The main seat is drivingly connected to the translation drive mechanism; The buffer seat is slidably arranged on the main seat, the elastic support seat is arranged on the main seat, the elastic support seat is located on the side of the buffer seat away from the mold base, and the elastic support seat elastically abuts against the buffer seat; The thick diameter body of the needle is fixed to the buffer seat.

4. The drainage catheter melt head forming apparatus of claim 3, wherein, The main seat is provided with guide rail, and the guide rail extends along the translation direction of the translation drive mechanism; The buffer seat is provided with sliding block; The sliding block is slidably connected to the guide rail.

5. The drainage catheter melt head forming apparatus of claim 3, wherein, The elastic support seat includes seat frame and elastic component; The seat frame is fixed to the end of the main seat away from the mold base; The elastic component abuts against the seat frame and the buffer seat respectively at two ends.

6. The drainage catheter melt head forming apparatus of claim 5, wherein, The buffer seat has accommodating groove; The elastic support seat includes guide piece, the guide piece is fixed to the seat frame, and the guide piece extends into the accommodating groove; The elastic component is sleeved on the guide piece; One end of the elastic component abuts against the guide piece, and the other end of the elastic component is accommodated in the accommodating groove and abuts against the buffer seat.

7. The drainage catheter melt head forming apparatus of claim 3, wherein, The utility model relates to a kind of core needle positioning device, including fixed assembly; The fixed assembly is arranged on the end of the main seat close to the mold base; The fixed assembly has clamp, and the clamp is used to clamp or release needle and pipe body sleeved on needle.

8. The drainage catheter melt head forming apparatus of claim 1, wherein, The mold base has end plate, melting head piece and heating piece; The end plate is fixed to the base; The melting head piece is arranged on the end plate, and the melting head piece has through vertebral cavity; The heating piece is arranged on the end plate, and the heating piece can be sleeved on the melting head piece.

9. The drainage catheter melt head forming apparatus of claim 8, wherein, The utility model relates to a kind of core needle positioning device, including drive piece, first gear and second gear; The melting head piece is rotatably arranged on the end plate, and the first gear is connected to the melting head piece; The second gear is rotatably connected to the end plate, and the second gear and the first gear are engaged; The drive piece is arranged on the end plate, and the drive piece is connected to the second gear.

10. The drainage catheter melt head forming apparatus of any of claims 1-9, wherein, The utility model relates to a kind of core needle positioning device, including main body part, motor and lead screw; The motor is arranged on one end of the main body part, and the lead screw is rotatably arranged on the main body part; The needle base is threadedly connected to the lead screw, and the needle base is slidably connected to the main body part; The motor and the lead screw are in transmission connection, drive the lead screw to rotate, drive the needle holder to translate along the main body.

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