A molding die for a medical catheter

Abstract

This utility model belongs to the field of medical catheter manufacturing and processing technology, and particularly relates to a molding die for medical catheters. It includes a die body with three core components equidistantly installed circumferentially within the die body. A flow channel is provided between the die body and the core components. A main channel is located at the center of the die body. An injection molding heat pipe assembly inserted into the main channel communicates with the flow channel through branch channels. A fastening and adjusting component is provided within the main channel, and the fastening and adjusting component is slidably connected to the injection molding heat pipe assembly. High-temperature molten injection material is injected into the injection molding heat pipe assembly. The injection material flows into the three flow channels through the three branch channels and is then extruded and molded through the three core components. The die body with three identical core components can mold three sets of medical catheters at a time, improving the production efficiency of medical catheters. The die body with three different core components can produce three types of medical catheters at a time, increasing the diversity of medical catheter production.

Description

Technical Field

[0001] This utility model belongs to the field of medical catheter manufacturing and processing technology, and in particular relates to a molding die for a medical catheter. Background Technology

[0002] Existing medical catheter molding dies can only extrude one set of medical catheters at a time, resulting in slow production efficiency. Furthermore, they cannot extrude multiple types of medical catheters simultaneously, thus lacking the diversity of medical catheter production.

[0003] For example, patent application number CN201520659633.3 describes an integrated molding die for medical catheters, which includes a mold body. One end of the mold body includes a filter plate, and the other end includes an orifice. The mold body includes a flow comb and a core mold. The core mold contains a medical needle. The forming section of the core rod is replaced with a medical needle. The orifice size is scaled by calculating the shrinkage ratio, and the die is directly pulled out and formed. However, the disadvantage of this technical solution is that only one set of medical catheters can be extruded at a time, resulting in slow production efficiency. Furthermore, it cannot extrude multiple types of medical catheters at the same time, thus lacking the diversity of medical catheter production. Utility Model Content

[0004] The purpose of this utility model is to provide a molding die for medical catheters to solve the problems in the prior art. The specific technical solution is as follows:

[0005] A molding die for a medical catheter includes a die body, three core components are equidistantly mounted on the inner circumference of the die body, a flow channel is provided between the die body and the core components, a main channel is provided at the center of the die body, an injection-molded heat pipe assembly inserted into the main channel is connected to the flow channel through a branch channel, and a fastening adjustment component is provided in the main channel, the fastening adjustment component is slidably connected to the injection-molded heat pipe assembly.

[0006] Furthermore, the three mold core components include three mold cores and three orifices. The three mold cores are matched with the three orifices one by one. All three mold cores are pressed and fixed in the mold body by the rear pressure plate. The rear pressure plate is fixedly connected to the mold body by the rear locking screw.

[0007] Furthermore, all three dies are pressed and fixed within the mold body by a front pressure plate, which is fixedly connected to the mold body by a front locking screw.

[0008] Furthermore, the rear end of the mold core is tightly fitted to the mold body, a flow channel is provided between the middle end of the mold core and the mold body, the front end of the mold core is located inside the die, and an inclined transition area is provided at the connection between the middle end and the rear end of the mold core, with the branch channel opening facing the inclined transition area.

[0009] Furthermore, the rear end of the die is tightly fitted to the die body, and a guide cavity is provided between the front end of the die and the front end of the die core, which is connected to the flow channel.

[0010] Furthermore, the injection-molded heat pipe assembly includes an injection-molded heat pipe that slides within the main channel via a support plate. The front end of the injection-molded heat pipe rests against a fastening and adjusting assembly. Three branch pipes are fixedly connected to the injection-molded heat pipe at equal intervals, and each of the three branch pipes corresponds to one of the three branch channels.

[0011] Furthermore, a sleeve is slidably connected to the branch pipe, a spring is provided between the lower end of the sleeve and the injection-molded heat pipe, and an upper extrusion plate is provided at the lower end of the sleeve. The upper extrusion plate is slidably connected to the fastening and adjusting assembly.

[0012] Furthermore, a sealing ring one is provided at the lower edge of the branch pipe, and a sealing ring two is provided inside the branch channel.

[0013] Furthermore, the fastening and adjustment assembly includes an inner support, which is fixed in the main channel. The front end of the injection-molded heat pipe abuts against the inner support. A sliding plate is slidably connected in the main channel. The front end of the sliding plate is provided with three lower extrusion blocks, which are slidably connected to three upper extrusion plates.

[0014] Furthermore, the slide plate is rotatably connected to the front end of the screw, and the screw is threadedly connected to the mold body.

[0015] The advantages of this utility model are:

[0016] High-temperature molten injection material is injected into the injection heat pipe assembly. The injection material in the injection heat pipe assembly flows into three flow channels through three branch channels, and is then extruded and formed through three mold core assemblies. If three identical mold core assemblies are installed in the mold body, three sets of medical catheters can be formed in one go, which improves the production efficiency of medical catheters. If three different mold core assemblies are installed in the mold body, three types of medical catheters can be produced in one go, which increases the diversity of medical catheter production. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0018] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0019] Figure 3 for Figure 1 Diagram of the position of the cutting line Figure 1 ;

[0020] Figure 4 for Figure 3 A sectional view along section AA;

[0021] Figure 5 for Figure 4 Enlarged view of a portion of point A in the middle;

[0022] Figure 6 for Figure 1 Diagram of the position of the cutting line Figure 2 ;

[0023] Figure 7 for Figure 6 A sectional view along section BB;

[0024] Figure 8 for Figure 7 Enlarged view of a section at point B in the middle;

[0025] Explanation of markings in the diagram:

[0026] 1. Mold body; 2. Mold core; 3. Die; 4. Front pressure plate; 5. Front locking screw; 6. Rear pressure plate; 7. Rear locking screw; 8. Branch channel; 9. Main channel; 10. Inner support; 11. Slide plate; 12. Lower extrusion block; 13. Screw; 14. Injection heat pipe; 15. Branch pipe; 16. Sleeve; 17. Spring; 18. Upper extrusion plate; 19. Sealing ring one; 20. Sealing ring two; 21. Support plate. Detailed Implementation

[0027] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0028] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] Example 1

[0030] like Figure 1-8 As shown, a molding die for a medical catheter includes a die body 1. Three core components are equidistantly installed on the inner circumference of the die body 1. A flow channel is provided between the die body 1 and the core components. A main channel 9 is provided at the center of the die body 1. An injection-molded heat pipe assembly inserted into the main channel 9 is connected to the flow channel through a branch channel 8. A fastening adjustment component is provided in the main channel 9. The fastening adjustment component is slidably connected to the injection-molded heat pipe assembly.

[0031] The working principle of the above technical solution is as follows: High-temperature molten injection material is injected into the injection heat pipe assembly. The injection material in the injection heat pipe assembly is injected into the three flow channels through three branch channels 8 respectively, and then extruded and formed through three mold core assemblies. If three identical mold core assemblies are installed in the mold body 1, three sets of medical catheters can be formed at one time, which improves the production efficiency of medical catheters. If three different mold core assemblies are installed in the mold body 1, three types of medical catheters can be produced at one time, which increases the production diversity of medical catheters.

[0032] Both the mold body 1 and the mold core assembly are made of hardened steel, which has the characteristics of corrosion resistance, high temperature resistance and thermal fatigue resistance.

[0033] Example 2

[0034] like Figure 1-8 As shown, the three mold core assemblies include three mold cores 2 and three orifice molds 3. The three mold cores 2 are respectively matched with the three orifice molds 3. The three mold cores 2 are all pressed and fixed in the mold body 1 by the rear pressure plate 6. The rear pressure plate 6 is fixedly connected to the mold body 1 by the rear locking screw 7.

[0035] All three die 3 are pressed and fixed inside the mold body 1 by the front pressure plate 4. The front pressure plate 4 is fixedly connected to the mold body 1 by the front locking screw 5.

[0036] The working principle of the above technical solution is as follows: three mold cores 2 are inserted into the mold body 1 from the rear end of the mold body 1. All three mold cores 2 are pressed and fixed in the mold body 1 by the rear pressure plate 6. Three die 3 are inserted into the mold body 1 from the front end of the mold body 1. The die 3 is inserted into the mold core 2. All three die 3 are pressed and fixed in the mold body 1 by the front pressure plate 4.

[0037] The rear locking screw 7 and the front locking screw 5 can be removed, and then the rear pressure plate 6 and the front pressure plate 4 can be removed from the mold body 1. The mold core 2 and the orifice 3 can be removed from the mold body 1 for easy replacement and maintenance. By replacing different models of mold core 2 and orifice 3, different models of medical catheters can be produced.

[0038] Example 3

[0039] like Figure 1-8 As shown, the rear end of the mold core 2 is tightly fitted with the mold body 1, a flow channel is provided between the middle end of the mold core 2 and the mold body 1, the front end of the mold core 2 is located inside the die 3, and an inclined transition area is provided at the connection between the middle end and the rear end of the mold core 2, with the branch channel 8 opening towards the inclined transition area.

[0040] The rear end of the die 3 is tightly fitted to the mold body 1, and a guide cavity is provided between the front end of the die 3 and the front end of the mold core 2, and the guide cavity is connected to the flow channel.

[0041] The working principle of the above technical solution is as follows: the high-temperature molten injection material enters the flow channel through the branch channel 8. Under the guidance of the inclined transition zone, the high-temperature molten injection material moves towards the conduit mold cavity. Cooling water pipes are wrapped around the outside of the die 3. The injection material cools and solidifies in the conduit mold cavity to form a medical conduit.

[0042] Example 4

[0043] like Figure 1-8 As shown, the injection-molded heat pipe assembly includes an injection-molded heat pipe 14, which slides in the main channel 9 via a support plate 21. The front end of the injection-molded heat pipe 14 abuts against the fastening and adjusting assembly. Three branch pipes 15 are fixedly connected to the injection-molded heat pipe 14 at equal intervals, and the three branch pipes 15 correspond one-to-one with the three branch channels 8.

[0044] A sleeve 16 is slidably connected to the branch pipe 15. A spring 17 is provided between the lower end of the sleeve 16 and the injection hot pipe 14. An upper extrusion plate 18 is provided at the lower end of the sleeve 16. The upper extrusion plate 18 is slidably connected to the fastening and adjusting assembly.

[0045] The fastening and adjustment assembly includes an inner support 10, which is fixed in the main channel 9. The front end of the injection heat pipe 14 abuts against the inner support 10. A slide plate 11 is slidably connected in the main channel 9. The front end of the slide plate 11 is provided with three lower extrusion blocks 12, which are slidably connected to three upper extrusion plates 18.

[0046] The sliding plate 11 is rotatably connected to the front end of the screw 13, and the screw 13 is threadedly connected to the mold body 1.

[0047] The working principle of the above technical solution is as follows: Remove the rear locking screw 7, remove the rear pressure plate 6 from the mold body 1, insert the injection heat pipe 14 into the main channel 9, the support plate 21 slides against the inner wall of the main channel 9, the support plate 21 has a supporting function, and at the same time the support plate 21 can ensure that the injection heat pipe 14 moves forward on the central axis of the main channel 9. When the front end of the injection heat pipe 14 abuts against the inner bracket 10, the injection heat pipe 14 stops moving forward, and the rear pressure plate 6 is reattached to the mold body 1. The inner wall of the rear pressure plate 6 is tightly attached to the support plate 21, and then the injection heat pipe 14 is fixed in the main channel 9 by the rear pressure plate 6 and the inner bracket 10.

[0048] Rotating the screw 13 causes the screw 13 to rotate with the mold body 1, which in turn moves the front end of the screw 13 toward the injection heat pipe 14. This causes the slide plate 11 to slide forward in the main channel 9, which in turn moves the three lower extrusion blocks 12 forward. The three lower extrusion blocks press the three upper extrusion plates 18 to move, causing the three sleeves 16 to slide with the branch pipes 15. This causes the spring 17 to be stretched, causing the upper end of the sleeve 16 to press against the second sealing ring 20 and the lower end of the sleeve 16 to press against the first sealing ring 19. This connects the injection heat pipe 14 to the three flow channels through the three branch channels 8. The high-temperature molten injection material in the injection heat pipe 14 can enter the three flow channels through the three branch channels 8 and then be extruded and formed through the guide mold cavity.

[0049] Example 5

[0050] like Figure 1-8 As shown, a sealing ring 19 is provided at the lower edge of the branch pipe 15, and a sealing ring 20 is provided inside the branch channel 8;

[0051] The working principle of the above technical solution is as follows: sealing ring 19 can increase the sealing between branch pipe 15 and sleeve 16, and sealing ring 20 can increase the sealing between sleeve 16 and branch channel 8.

[0052] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A forming mold for a medical catheter, characterized by, The mold body (1) includes a mold body (1), three mold core components are installed equidistantly in the inner circumference of the mold body (1), a flow channel is provided between the mold body (1) and the mold core components, a main channel (9) is provided at the center of the mold body (1), an injection heat pipe assembly inserted in the main channel (9) is connected to the flow channel through a branch channel (8), a fastening adjustment assembly is provided in the main channel (9), and the fastening adjustment assembly is slidably connected to the injection heat pipe assembly.

2. A forming mold for a medical catheter according to claim 1, wherein The three mold core components include three mold cores (2) and three orifice molds (3). The three mold cores (2) are respectively matched with the three orifice molds (3). The three mold cores (2) are all pressed and fixed in the mold body (1) by the rear pressure plate (6). The rear pressure plate (6) is fixedly connected to the mold body (1) by the rear locking screw (7).

3. A forming mold for a medical catheter according to claim 2, wherein The three die plates (3) are all pressed and fixed inside the die body (1) by the front pressure plate (4), and the front pressure plate (4) is fixedly connected to the die body (1) by the front locking screw (5).

4. The forming mold for a medical catheter according to claim 2, wherein The rear end of the mold core (2) is closely fitted with the mold body (1), and a flow channel is provided between the middle end of the mold core (2) and the mold body (1). The front end of the mold core (2) is located inside the die (3). An inclined transition area is provided at the connection between the middle end and the rear end of the mold core (2), and the branch channel (8) opens towards the inclined transition area.

5. A forming mold for a medical catheter according to claim 4, wherein The rear end of the die (3) is tightly fitted with the mold body (1), and a guide cavity is provided between the front end of the die (3) and the front end of the mold core (2), and the guide cavity is connected to the flow channel.

6. The forming mold for a medical catheter according to claim 1, wherein The injection-molded heat pipe assembly includes an injection-molded heat pipe (14), which slides in the main channel (9) via a support plate (21). The front end of the injection-molded heat pipe (14) rests against the fastening and adjusting assembly. Three branch pipes (15) are fixedly connected to the injection-molded heat pipe (14) at equal intervals. The three branch pipes (15) correspond one-to-one with the three branch channels (8).

7. A forming mold for a medical catheter according to claim 6, wherein A sleeve (16) is slidably connected to the branch pipe (15). A spring (17) is provided between the lower end of the sleeve (16) and the injection-molded hot pipe (14). An upper extrusion plate (18) is provided at the lower end of the sleeve (16). The upper extrusion plate (18) is slidably connected to the fastening adjustment assembly.

8. A forming mold for a medical catheter according to claim 7, wherein A sealing ring 1 (19) is provided at the lower edge of the branch pipe (15), and a sealing ring 2 (20) is provided inside the branch channel (8).

9. A forming mold for a medical catheter according to claim 7, wherein The fastening and adjustment assembly includes an inner support (10), which is fixed in the main channel (9). The front end of the injection heat pipe (14) abuts against the inner support (10). A sliding plate (11) is slidably connected in the main channel (9). The front end of the sliding plate (11) is provided with three lower extrusion blocks (12), which are slidably connected to three upper extrusion plates (18).

10. A forming mold for a medical catheter according to claim 9, wherein The slide plate (11) is rotatably connected to the front end of the screw (13), and the screw (13) is threadedly connected to the mold body (1).

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