A tearable double pipe extrusion die

Abstract

The utility model relates to medical catheter extrusion technical field provides a kind of tearable double-row pipe extrusion mould, comprising: mould body, the right side of the mould body is equipped with the threaded hole for connecting extruder connecting piece, the first catheter flow regulating module and the second catheter flow regulating module are equipped on the mould body upper, the first runner and the second runner are equipped in the mould body interior;Staircase channel, the staircase channel is equipped in the left side of mould body and with threaded hole vertical, first mandrel and second mandrel are placed in the staircase channel;Pressing plate, the pressing plate is equipped with bolt hole for fixing mandrel, A hole and B hole are further equipped in the pressing plate.The utility model tearable double-row pipe extrusion mould, the wall thickness of extruded double-row pipe body is uniform and tearable, convenient for clinical application, simple structure, easy to disassemble, replace and clean, two pipe body flow independent regulation, independent gas supply, more convenient for adjusting catheter size.

Description

Technical Field

[0001] This utility model relates to the field of medical catheter extrusion technology, and in particular to a tearable double-row tube extrusion die, which is suitable for the continuous and efficient production of medical catheters, industrial hoses and other products. Background Technology

[0002] Currently, dual-row tube extrusion dies exist on the market, but their structures are complex and disassembly is difficult. Adjusting the flow rate on one side can cause pressure imbalance, resulting in uneven wall thickness. Furthermore, the extruded dual-row tubes are not easily torn, requiring secondary processing to create tear lines, which increases costs. For example, patent CN202320463630.7 discloses a dual-color tube extrusion device that uses a flow divider to compress the material and ultimately extrude dual-row tubes, but its extruded guide tubes are not easily torn, failing to solve the problem of independent flow control and integrated tearing molding. Therefore, a tearable dual-row tube extrusion die needs to be designed to solve the above problems. Utility Model Content

[0003] Based on this, the purpose of this utility model is to address the shortcomings of the existing technology by providing a tearable double-row tube extrusion mold with uniform wall thickness that requires no adjustment, simple structure, easy disassembly and replacement, and tearable extruded double-row tubes.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A tearable double-row tube extrusion die, comprising: The mold body has a threaded hole on its right side for connecting to the extruder connector, a first conduit flow regulating module and a second conduit flow regulating module on the top of the mold body, and a first flow channel and a second flow channel inside the mold body; The feature is that the mold body is provided with a stepped channel inside, forming two independent inlet and outlet channels. The stepped channel is located on the left side of the mold body and is perpendicular to the threaded hole. The first core rod and the second core rod are placed in the stepped channel. A pressure plate, wherein the pressure plate is provided with bolt holes for fixing the mandrel.

[0005] As a further improvement of this utility model, the first mandrel and the mold body form a third flow channel, and the second mandrel and the mold body form a fourth flow channel.

[0006] As a further improvement of this utility model, one side of the first flow channel is connected to the threaded hole and the other side is connected to the third flow channel. The first mandrel is provided with a through hole. One side of the second flow channel is connected to the threaded hole and the other side is connected to the fourth flow channel through the through hole.

[0007] As a further improvement of this utility model, the pressure plate is provided with hole A and hole B.

[0008] As a further improvement of this utility model, the first mandrel is provided with a first conduit vent hole inside. The first conduit vent hole adopts a bent structure, penetrates the inner and outer channels, ensures ventilation and does not affect the material flow channel. The second mandrel is provided with a straight vent hole inside.

[0009] As a further improvement of this utility model, hole A in the pressure plate is connected to a straight vent hole, and hole B is connected to a vent hole in the first conduit.

[0010] As a further improvement of this utility model, the first conduit flow regulating module includes a first regulating column, a first regulating nut, and a first regulating locking nut. The first regulating column is installed inside the first regulating nut and then connected to the first flow channel. One end of the first regulating nut is threadedly connected to the mold body, and the other end is threadedly connected to the first regulating locking nut to lock the first regulating column.

[0011] As a further improvement of this utility model, the second conduit flow regulating module includes a second regulating column, a second regulating nut, and a second regulating locking nut. The second regulating column is installed inside the second regulating nut and then connected to the second flow channel. One end of the second regulating nut is threadedly connected to the mold body, and the other end is threadedly connected to the second regulating locking nut to lock the second regulating column.

[0012] The beneficial effects of this utility model are: This utility model provides a tearable double-row tube extrusion die. The die has a stepped channel inside for placing the first core rod and the second core rod, forming two independent inlet and outlet channels. This ensures that the channels do not affect each other. The structure is simple, easy to disassemble and replace, and easy to clean.

[0013] This invention provides a tearable double-row tube extrusion die. The mandrel installed in the die has a transition fit with the die body to ensure coaxiality. The extruded tube has a uniform wall thickness, requires no adjustment, saves time and materials, and reduces the technical requirements for personnel.

[0014] This invention provides a tearable double-row tube extrusion die. The first mandrel contains a first conduit vent hole with a bent structure to pass through the inner and outer channels, which is used to adjust the inner diameter of the extruded first conduit, so as to realize the extrusion operation of tearable double-row tubes in the stepped channel without affecting the interconnection of the channels.

[0015] This invention provides a tearable double-row tube extrusion die. The tapered shape of the first and second mandrels in the die is used to extrude granules and directly extrude double-row tubes. The double-row tubes are composed of parallel arranged lumens and are composite catheters with tearable properties and dual-channel structure, which are convenient for clinical application.

[0016] This utility model provides a tearable double-row tube extrusion die. The flow channels of the two tubes of the die are relatively independent. After the granules come out of the extruder, they pass through the connector and are diverted through the first flow channel and the second flow channel, so that the granules enter the third flow channel and the fourth flow channel respectively. The channel size of each flow channel can be controlled by the first conduit flow adjustment module and the second conduit flow adjustment module, thereby realizing flow control. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Appendix Figure 1 This is a schematic diagram of the three-dimensional structure of a tearable double-row tube extrusion die.

[0019] Appendix Figure 2 This is a cross-sectional view of a tearable double-row tube extrusion die.

[0020] Appendix Figure 3 This is a cross-sectional view of the first mandrel, showing the mandrel ventilation structure.

[0021] Appendix Figure 4 This is a cross-sectional view of the first conduit flow regulation module.

[0022] Appendix Figure 5 This is a cross-sectional view of the second conduit flow regulation module.

[0023] Appendix Figure 6 This is a top view of the three-dimensional structure of a tearable double-row tube extrusion die.

[0024] In the diagram: 1 is the mold body, 2 is the first mandrel, 3 is the second mandrel, 4 is the pressure plate, 5 is the threaded hole, 6 is the first flow channel, 7 is the second flow channel, 8 is the third flow channel, 9 is the fourth flow channel, 10 is the through hole, 11 is the first conduit vent hole, 12 is hole A, 13 is hole B, 14 is the straight vent hole, 15 is the first conduit flow rate adjustment module, 16 is the second conduit flow rate adjustment module, 17 is the first adjustment column, 18 is the first adjustment nut, 19 is the first adjustment locking nut, 20 is the second adjustment column, 21 is the second adjustment nut, and 22 is the second adjustment locking nut. Detailed Implementation

[0025] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0026] like Figures 1-6 As shown, this invention provides a tearable double-row tube extrusion die, the extrusion die comprising: The mold body 1 has a threaded hole 5 on the right side for connecting the extruder connector. The mold body 1 has a first conduit flow regulating module 15 and a second conduit flow regulating module 16 on the top. The mold body 1 has a first flow channel 6 and a second flow channel 7 inside. A stepped channel is provided on the left side of the mold body 1 and perpendicular to the threaded hole 5. A first core rod 2 and a second core rod 3 are placed in the stepped channel. The first core rod 2 is provided with a through hole 10. The pressure plate 4 is provided with four bolt holes for fixing the mandrel, and the pressure plate 4 is also provided with hole A 12 and hole B 13.

[0027] In one specific embodiment, the first mandrel 2 and the mold body 1 further form a third flow channel 8, and the second mandrel 3 and the mold body 1 form a fourth flow channel 9.

[0028] In one specific embodiment, the first flow channel 6 is connected to the threaded hole 5 on one side and to the third flow channel 8 on the other side; the second flow channel 7 is connected to the threaded hole 5 on one side and to the fourth flow channel 9 through the through hole 10 on the other side.

[0029] In one specific embodiment, the first mandrel 2 is further provided with a first conduit vent 11 inside, which can be used to adjust the taper of the first mandrel 2 in the third flow channel 8 to achieve the extrusion of granules and form a forming channel for the first conduit; the second mandrel 3 is provided with a straight vent 14 inside, which can be used to adjust the taper of the second mandrel 3 in the fourth flow channel 9 to achieve the extrusion of granules and form a forming channel for the second conduit. This tapered forming channel ensures a certain pressure during the material forming process, eliminates internal pores and improves material density, and combined with the internal vent, achieves uniform material distribution and ensures the forming of the tube size.

[0030] In one specific embodiment, the pressure plate 4 further includes hole A 12 connected to the straight vent hole 14, and hole B 13 connected to the first conduit vent hole 11.

[0031] In one specific embodiment, the first conduit flow rate adjustment module 15 further includes a first adjustment post 17, a first adjustment nut 18, and a first adjustment locking nut 19. The first adjustment post 17 is installed inside the first adjustment nut 18 and connected to the first flow channel 6. One end of the first adjustment nut 18 has an external thread, which is threadedly connected to the mold body 1. The other end of the first adjustment nut 18 has an internal thread, which is threadedly connected to the external thread of the first adjustment locking nut 19. The first adjustment locking nut 19 is installed inside the first adjustment nut 18 and is used to lock the first adjustment post 17. The first conduit flow rate adjustment module 15 can adjust the flow rate of the first conduit, thereby controlling the extrusion volume of the first conduit, and can also avoid the adjustment difficulties caused by machining misalignment with ordinary bolts.

[0032] In one specific embodiment, the second conduit flow rate adjustment module 16 further includes a second adjustment column 20, a second adjustment nut 21, and a second adjustment locking nut 22. The second adjustment column 20 is installed inside the second adjustment nut 21 and connected to the second flow channel 7. One end of the second adjustment nut 21 has an external thread, which is threadedly connected to the mold body 1. The other end of the second adjustment nut 21 has an internal thread, which is threadedly connected to the external thread of the second adjustment locking nut 22. The second adjustment locking nut 22 is installed inside the second adjustment nut 21 and is used to lock the second adjustment column 20. The second conduit flow rate adjustment module 16 can adjust the flow rate of the second conduit, thereby controlling the extrusion volume of the second conduit, and can also avoid the adjustment difficulties caused by machining misalignment with ordinary bolts.

[0033] Working Principle: After exiting the extruder, the granules pass through the connector and are diverted via the first flow channel 6 and the second flow channel 7, respectively entering the third flow channel 8 and the fourth flow channel 9. In the third flow channel 8, the taper of the first mandrel 2 extrudes the granules to form the first conduit, and in the fourth flow channel 9, the taper of the second mandrel 3 extrudes the granules to form the second conduit. During operation, the extrusion rate of the first conduit is adjusted by the first conduit flow rate adjustment module 15, and the extrusion rate of the second conduit is adjusted by the second conduit flow rate adjustment module 16. The extrusion rates of the two conduits are controlled independently, enabling adjustment of the outer diameter of the tearable conduit. The airflow of the first and second conduits is independently controlled by the first conduit vent 11 and the straight vent 14, respectively, allowing adjustment of the conduit's inner diameter. Independent control of the extrusion rate and airflow of the conduits avoids the problem of a change in the flow rate of one conduit causing a synchronous change in the flow rate of the other conduit, making the flow rate of the other conduit uncontrollable.

[0034] It is understood that the above specific description of this utility model is only used to illustrate this utility model and is not limited to the technical solutions described in the embodiments of this utility model. Those skilled in the art should understand that modifications or equivalent substitutions can still be made to this utility model to achieve the same technical effect; as long as the use needs are met, they are all within the protection scope of this utility model.

[0035] It should also be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A tearable double-row tube extrusion die, comprising, The mold body (1) has a threaded hole (5) on the right side for connecting the extruder connector. The mold body (1) has a first conduit flow regulating module (15) and a second conduit flow regulating module (16) on the top. The mold body (1) has a first flow channel (6) and a second flow channel (7) inside. Its features are, The mold (1) has a stepped channel inside, forming two independent inlet and outlet channels. The stepped channel is located on the left side of the mold (1) and is perpendicular to the threaded hole (5). The first core rod (2) and the second core rod (3) are placed in the stepped channel. Pressure plate (4), the pressure plate (4) is provided with bolt holes for fixing the core rod.

2. The tearable double-row tube extrusion die according to claim 1, characterized in that, The first mandrel (2) and the mold body (1) form a third flow channel (8), and the second mandrel (3) and the mold body (1) form a fourth flow channel (9).

3. The tearable double-row tube extrusion die according to claim 2, characterized in that, The first flow channel (6) is connected to the threaded hole (5) on one side and to the third flow channel (8) on the other side. The first mandrel (2) is provided with a through hole (10). The second flow channel (7) is connected to the threaded hole (5) on one side and to the fourth flow channel (9) through the through hole (10) on the other side.

4. The tearable double-row tube extrusion die according to claim 1, characterized in that, The pressure plate (4) is also provided with hole A (12) and hole B (13).

5. The tearable double-row tube extrusion die according to claim 4, characterized in that, The first core rod (2) has a first conduit vent hole (11) inside. The first conduit vent hole (11) adopts a bent structure and penetrates the inner and outer channels. The second core rod (3) has a straight vent hole (14) inside.

6. The tearable double-row tube extrusion die according to claim 5, characterized in that, The pressure plate (4) has hole A (12) connected to the straight vent (14) and hole B (13) connected to the first conduit vent (11).

7. The tearable double-row tube extrusion die according to claim 1, characterized in that, The first conduit flow regulation module (15) includes a first regulating column (17), a first regulating nut (18) and a first regulating locking nut (19). The first regulating column (17) is installed in the first regulating nut (18) and then connected to the first flow channel (6). One end of the first regulating nut (18) is threaded to the mold body (1), and the other end is threaded to the first regulating locking nut (19) to lock the first regulating column (17).

8. The tearable double-row tube extrusion die according to claim 1, characterized in that, The second conduit flow regulating module (16) includes a second regulating column (20), a second regulating nut (21) and a second regulating locking nut (22). The second regulating column (20) is installed in the second regulating nut (21) and then connected to the second flow channel (7). One end of the second regulating nut (21) is threaded to the mold body (1), and the other end is threaded to the second regulating locking nut (22) to lock the second regulating column (20).

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