A one-time molding multi-lumen rubber head catheter pressing die

Abstract

The application discloses a one-time forming multi-lumen rubber head catheter pressing die, which comprises an upper die, a lower die and a rubber head catheter, the upper die and the lower die are matched to form a plurality of forming cavities, the rubber head catheter comprises a silica gel pipe body and a lumen head, a plurality of lumen channels penetrating through the lumen head are arranged on the silica gel pipe body, the forming cavities respectively accommodate the rubber head catheter, a urinary catheter cavity core rod, a center cavity core rod assembly and a balloon cavity core rod, tail ends of the urinary catheter cavity core rod, the center cavity core rod assembly and the balloon cavity core rod are respectively inserted into the lumen channels, the center cavity core rod assembly comprises a center cavity core rod and a center cavity sleeve sleeved on the center cavity of the center cavity core rod, a plurality of bending grooves are arranged in the center cavity sleeve, a plurality of core needle holes are arranged on the circumference of the center cavity sleeve in the axial direction, and a water inlet and outlet cavity core needle is arranged in the core needle hole. The application solves the problem that the multi-lumen rubber head catheter is difficult to form.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of mold, in particular to a one-time molding multi-lumen catheter compression mold. BACKGROUND

[0002] The general silicone catheter compression mold has two kinds of solid silicone compression mold and liquid silicone compression mold. Generally, when the lumen of the silicone tube body does not exceed 4, and the lumen of the silicone tube body is required to be through with the cavity head, the general solid silicone compression mold can be used, that is, the mold has four cavities to press the catheter with four lumens. However, when the lumen of the silicone tube body exceeds 4 or even more, the general solid silicone compression mold cannot be used to complete the one-time compression. SUMMARY

[0003] In view of the above-mentioned deficiencies of the existing one-time molding multi-lumen catheter compression mold, the present application can realize one-time compression of multi-lumen catheter.

[0004] To achieve the above-mentioned purpose, the embodiments of the present application adopt the following technical solutions:

[0005] A one-time molding multi-lumen catheter compression mold, comprising an upper mold, a lower mold and a catheter, the upper mold and the lower mold cooperate to form a plurality of cavities, the catheter comprises a silicone tube body and a cavity head, the silicone tube body is provided with a plurality of lumens through the cavity head, the cavities respectively accommodate the catheter, a urinary lumen core rod, a central lumen core rod assembly and a balloon lumen core rod, the tail ends of the urinary lumen core rod, the central lumen core rod assembly and the balloon lumen core rod are respectively inserted into the lumens, the central lumen core rod assembly comprises a central lumen core rod and a central lumen sleeve sleeved on the central lumen core rod, a plurality of bending grooves are arranged inside the central lumen sleeve, a plurality of core needle holes are arranged on the circumferential axis of the central lumen sleeve, a water inlet and outlet lumen core needle is arranged in the core needle hole, and the water inlet and outlet lumen core needle can rotate in the core needle hole.

[0006] According to an aspect of the present application, the water inlet and outlet lumen core needles are arranged in parallel around the central axis of the central lumen core rod.

[0007] According to an aspect of the present application, the water inlet and outlet lumen core needles are arranged in a circumferential ladder around the central axis of the central lumen core rod.

[0008] According to an aspect of the present application, the lengths of adjacent water inlet and outlet lumen core needles have a preset difference.

[0009] According to an aspect of the present application, the preset difference of the adjacent water inlet and outlet lumen core needles is 4mm, and the length difference between the longest water inlet and outlet lumen core needle and the shortest water inlet and outlet lumen core needle is 28mm.

[0010] According to one aspect of the present application, one end of the water inlet and outlet cavity core needle is a round head, the other end of the water inlet and outlet cavity core needle is a flat head, and the end of the water inlet and outlet cavity core needle close to the flat head is outwardly bent and arranged in the bent groove of the central cavity outer sleeve.

[0011] According to one aspect of the present application, the lower die is provided with a positioning pin.

[0012] According to one aspect of the present application, the lower die is provided with a core rod positioning pin.

[0013] According to one aspect of the present application, a core sleeve positioning pin is arranged between the central cavity core rod and the central cavity outer sleeve.

[0014] According to one aspect of the present application, the cavity channel includes one urethral catheterization cavity channel, one balloon cavity channel, one central cavity channel and eight water inlet and outlet cavity channels for inserting water inlet and outlet cavity core needles, the urethral catheterization cavity channel is used for inserting a urethral catheterization cavity core rod, and the balloon cavity channel is used for inserting a balloon cavity core rod.

[0015] The advantages of the present application are as follows: when the cavity channel is not less than four, the existing mold is difficult to have enough space to place the water inlet and outlet cavity core needles, thereby causing the multi-cavity catheter tube to be difficult to be formed by the existing mold, and the present application solves the problem of the difficulty in forming the multi-cavity catheter tube by embedding the plurality of water inlet and outlet cavity core needles and the central cavity core rod, and improves the insertion efficiency of the water inlet and outlet cavity core needles by arranging the water inlet and outlet cavity core needles in a circular step around the central axis of the central cavity core rod. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0017] Figure 1 The sectional view of the mold of the present application;

[0018] Figure 2 The schematic view of the comparative example;

[0019] Figure 3 The top view of the lower die of the present application;

[0020] Figure 4 The schematic view of Figure 3 B-B direction;

[0021] Figure 5 The structural schematic view of the central cavity core rod assembly of the present application;

[0022] Figure 6 The structural schematic view ofFigure 5 schematic view of the C-C direction of the present application;

[0023] Figure 7 schematic view of the present application;

[0024] Figure 8 schematic view of the A-A direction of the present application. Figure 7

[0025] 1, upper mold; 2, positioning pin; 3, urethral lumen core rod; 4, central lumen core rod assembly; 41, water inlet and outlet lumen core needle; 411, first water inlet and outlet lumen core needle; 412, eighth water inlet and outlet lumen core needle; 42, central lumen core rod; 43, central lumen outer sleeve; 44, core sleeve positioning pin; 45, bending groove; 5, balloon lumen core rod; 6, lower mold; 7, core rod positioning pin; 8, silicone catheter; 81, silicone tube body; 82, lumen head; 9, lumen; 91, urethral lumen; 92, balloon lumen; 93, water inlet and outlet lumen; 94, central lumen. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0027] Comparative example:

[0028] The existing silicone catheter pressing mold is shown in Figure 2 The silicone catheter 8 is provided with a lumen 9, which includes a central lumen 94, a urethral lumen 91 and a balloon lumen 92. In use, the central lumen core rod 42 is inserted into the central lumen 94, the urethral lumen core rod 3 is inserted into the urethral lumen 91, and the balloon lumen core rod 5 is inserted into the balloon lumen 92, and then the assembled silicone catheter 8 is placed on the pressing mold for pressing.

[0029] Example 1

[0030] As Figure 1 , Figures 3 to 8 ​As shown in the figure, a one-time molding multi-lumen rubber head catheter pressing die includes an upper die 1, a lower die 6 and a rubber head catheter 8. The upper die 1 and the lower die 6 cooperate to form a plurality of cavities. The rubber head catheter 8 includes a silica gel tube body 81 and a cavity head 82. The silica gel tube body is provided with a plurality of cavities 9 penetrating the cavity head 82. The cavities respectively accommodate the rubber head catheter 8, a urinary catheter cavity mandrel 3, a central cavity mandrel assembly 4 and a balloon cavity mandrel 5. The tail ends of the urinary catheter cavity mandrel 3, the central cavity mandrel assembly 4 and the balloon cavity mandrel 5 are respectively inserted into the cavities 9. The central cavity mandrel assembly 4 includes a central cavity mandrel 42 and a central cavity sleeve 43 sleeved on the central cavity mandrel 42. The central cavity sleeve 43 is internally provided with a plurality of bending grooves 45. The central cavity sleeve 43 is circumferentially and axially provided with a plurality of core needle holes. The core needle holes are provided with water inlet and outlet cavity core needles 41. The water inlet and outlet cavity core needles 41 can rotate in the core needle holes. Before pressing, when the urinary catheter cavity mandrel 3, the central cavity mandrel assembly 4 and the balloon cavity mandrel 5 are placed in the specified cavity positions of the lower die 6, the upper die 1 is aligned with the three positioning pins 2 and then lightly placed on the upper surface of the lower die 6.

[0031] In actual application, one end of the water inlet and outlet cavity core needle 41 is a round head, and the other end is a flat head. The end close to the flat head of the water inlet and outlet cavity core needle 41 is bent outward by 90° and arranged in the bending groove 45 of the central cavity sleeve 43. The water inlet and outlet cavity core needle 41 is embedded in the bending groove 45, so that the water inlet and outlet cavity core needle 41 is fixed with the central cavity mandrel 42 and can be inserted into the cavity 9 of the silica gel tube body at one time. When disassembled, the central cavity mandrel 42 can be taken out together with the water inlet and outlet cavity core needle 41, without disassembling step by step.

[0032] As shown in the figure, Figure 6 In actual application, the water inlet and outlet cavity core needles 41 are arranged in parallel around the central axis of the central cavity mandrel 42. In use, the water inlet and outlet cavity core needles 41 are aligned with the cavities 9 for insertion.

[0033] As shown in the figure, Figure 6 The water inlet and outlet cavity core needles have eight, and the first water inlet and outlet cavity core needle 411 is at the ten o'clock position of the circumference. The remaining water inlet and outlet cavity core needles are arranged in sequence in the clockwise direction. The eighth water inlet and outlet cavity core needle 412 is at the seven o'clock position of the circumference. The first water inlet and outlet cavity core needle 411 has the shortest length, and the eighth water inlet and outlet cavity core needle 412 has the longest length.

[0034] As shown in the figures, Figure 1 and Figure 3 In actual application, the lower die 6 is provided with positioning pins 2 and mandrel positioning pins 7. The lower die 6 is provided with three positioning pins 2 and two mandrel positioning pins 7. One urinary catheter cavity mandrel 3 and one balloon cavity mandrel 5 are placed in the corresponding cavities of the lower die 6 and fixed in the cavities of the lower die 6 by the two mandrel positioning pins 7, so as to ensure that the urinary catheter cavity mandrel 3 and the balloon cavity mandrel 5 do not shift in the cavities.

[0035] In practical application, the core sleeve positioning pin 44 is arranged between the center cavity core rod 42 and the center cavity sleeve 43. The center cavity core rod assembly 4 is fixed at the specified cavity position of the lower mold 6 by the core sleeve positioning pin 44 to ensure that the center cavity core rod assembly 4 does not move.

[0036] In practical application, the cavity channel 9 includes a urethral catheter channel 91, a balloon channel 92, a water inlet and outlet channel 93 for inserting the water inlet and outlet core needle 41, and a center channel 94. The urethral catheter channel 91 is used for inserting the urethral catheter core rod 3, and the balloon channel 92 is used for inserting the balloon cavity core rod 5. All cavity channels 9 on the cavity head 82 correspond to all cavity channels 9 on the silicone catheter and are mutually penetrated.

[0037] The center cavity sleeve 43 and the center cavity core rod 42 are coaxially gap fitted.

[0038] The compression rubber head catheter 8 is implemented by the following process: Before the compression product rubber head catheter 8 is prepared, a certain length of silicone tube body (finished product) is prepared. First, the water inlet and outlet core needle 41 and the center cavity core rod 42 in the center cavity core rod assembly 4 are inserted into the corresponding cavity channel 9 of the silicone tube body, then the urethral catheter core rod 3 is inserted into the corresponding cavity channel 9 of the silicone tube body, and finally the balloon cavity core rod 5 is inserted into the corresponding cavity channel 9 of the silicone tube body. After completion, they are placed together in the corresponding cavity of the lower mold 6, so that the core rod positioning pin 7 is inserted into the corresponding hole of the urethral catheter core rod 3 and the balloon cavity core rod 5, and the core sleeve positioning pin 44 on the center cavity core rod assembly 4 is embedded in the corresponding groove of the lower mold 6.

[0039] After the above steps are completed, according to the conventional solid silicone compression mold operation method, a certain amount of solid silicone rubber is placed on the upper surface of the lower mold 6, the urethral catheter core rod 3, the balloon cavity core rod 5, and the center cavity core rod assembly 4, and then the upper mold 1 is closed. After the mold is closed, the compression rubber head catheter 8 is pressed according to the process requirements, that is, the product rubber head catheter 8 is completed in one time.

[0040] Example Two

[0041] As Figure 1 , Figures 3 to 8As shown, a disposable molded multi-lumen rubber head catheter pressing die includes an upper die 1, a lower die 6, and a rubber head catheter 8. The upper die 1 and the lower die 6 cooperate to form a plurality of cavities. The rubber head catheter 8 includes a silicone tube body 81 and a cavity head 82. The silicone tube body is provided with a plurality of cavities 9 that are in communication with the cavity head 82. The cavities respectively accommodate the rubber head catheter 8, a urinary catheter cavity mandrel 3, a central cavity mandrel assembly 4, and a balloon cavity mandrel 5. The tail ends of the urinary catheter cavity mandrel 3, the central cavity mandrel assembly 4, and the balloon cavity mandrel 5 are respectively inserted into the cavities 9. The central cavity mandrel assembly 4 includes a central cavity mandrel 42 and a central cavity sleeve 43 that is sleeved on the central cavity mandrel 42. The central cavity sleeve 43 is internally provided with a plurality of bending grooves 45. The central cavity sleeve 43 is circumferentially and axially provided with a plurality of needle holes. A water inlet and outlet cavity needle 41 is arranged in each needle hole. The water inlet and outlet cavity needle 41 can rotate in the needle hole. The water inlet and outlet cavity needles 41 are circumferentially and stepwise arranged around the central axis of the central cavity mandrel 42. The lengths of adjacent water inlet and outlet cavity needles 41 have a preset difference. Compared with Embodiment 1, the water inlet and outlet cavity needles 41 are circumferentially and stepwise arranged around the central axis of the central cavity mandrel 42. Since the water inlet and outlet cavity needles 41 themselves have an angle, in order to enable one end of the water inlet and outlet cavity needles 41 to be inserted into the tube body and the other end to be fixed on the sleeve, the circumferential stepwise arrangement is adopted. The water inlet and outlet cavity needle 41 with the shortest length (e.g., the first needle in Figure 7 ) is inserted first, and the water inlet and outlet cavity needle 41 with the longest length (e.g., the eighth needle in Figure 7 ) is inserted last. This can enable the water inlet and outlet cavity needles 41 to be efficiently inserted, which is more efficient than the parallel arrangement in Embodiment 1.

[0042] Before pressing, after the urinary catheter cavity mandrel 3, the central cavity mandrel assembly 4, and the balloon cavity mandrel 5 are placed in the specified cavity positions of the lower die 6, the upper die 1 is aligned with the three positioning pins 2 and then lightly placed on the upper surface of the lower die 6.

[0043] In actual application, one end of the water inlet and outlet cavity needle 41 is a round head, and the other end is a flat head. The end close to the flat head of the water inlet and outlet cavity needle 41 is bent outward by 90° and arranged in the bending groove 45 of the central cavity sleeve 43. The water inlet and outlet cavity needle 41 is embedded in the bending groove 45, so that the water inlet and outlet cavity needle 41 is fixed with the central cavity mandrel 42, and when disassembled, the central cavity mandrel 42 is taken out together with the water inlet and outlet cavity needle 41, without the need for sequential disassembly.

[0044] In actual application, the lower die 6 is provided with positioning pins 2 and mandrel positioning pins 7. The lower die 6 is provided with three positioning pins 2 and two mandrel positioning pins 7. One urinary catheter cavity mandrel 3 and one balloon cavity mandrel 5 are placed in the corresponding cavities of the lower die 6 and fixed in the cavities of the lower die 6 by the two mandrel positioning pins 7, to ensure that the urinary catheter cavity mandrel 3 and the balloon cavity mandrel 5 are not displaced in the cavities.

[0045] In practical application, the core sleeve positioning pin 44 is arranged between the center cavity core rod 42 and the center cavity sleeve 43. The center cavity core rod assembly 4 is fixed at the specified cavity position of the lower mold 6 by the core sleeve positioning pin 44 to ensure that the center cavity core rod assembly 4 is not displaced.

[0046] In the embodiment, the cavity channel 9 includes a urethral catheter channel 91 for inserting the urethral cavity core rod 3, a balloon cavity channel 92 for inserting the balloon cavity core rod 5, eight water inlet and outlet cavity channels 93 for inserting the water inlet and outlet cavity core needle 41, and a center cavity channel 94 for inserting the center cavity core rod 42. All the cavity channels 9 on the cavity head 82 correspond to and penetrate each other.

[0047] In the embodiment, the center cavity sleeve 43 and the center cavity core rod 42 are coaxially gap fitted, and eight water inlet and outlet cavity core needles 41 are uniformly arranged on the center cavity sleeve 43 and gap fitted.

[0048] In the embodiment, the preset difference of the adjacent water inlet and outlet cavity core needles 41 is 4 mm, and the length difference between the longest water inlet and outlet cavity core needle 41 and the shortest water inlet and outlet cavity core needle 41 is 28 mm.

[0049] In the embodiment, the water inlet and outlet cavity core needle 41 includes a parallel section and an inclined section, and the included angle between the parallel section and the inclined section is 177.4°.

[0050] In the embodiment, the inner diameter of the water inlet and outlet cavity channel 93 is not greater than 0.7 mm, and the inner diameters of the urethral cavity channel 91, the balloon cavity channel 92, and the center cavity channel 94 are all greater than 0.7 mm.

[0051] The process of assembling the center cavity core rod 42 is as follows: first, the flat end of the shortest water inlet and outlet cavity core needle 41 is inserted into the core needle hole of the center cavity sleeve 43 until it extends beyond the end surface of the center cavity sleeve 43, then the next water inlet and outlet cavity core needle 41 with a length of 4 mm longer than the previous one is inserted into the adjacent core needle hole of the center cavity sleeve 43 until it extends beyond the end surface of the center cavity sleeve 43, and so on until all the eight water inlet and outlet cavity core needles 41 are inserted into the core needle holes of the center cavity sleeve 43.

[0052] The eight inserted water inlet and outlet cavity core needles 41 are arranged in a ladder shape with a 3 mm taper and an R0.2 mm round head end using a special tool, and the parallel sections are arranged in an axial parallel manner to ensure that the central circular diameter of the eight water inlet and outlet cavity core needles 41 is ∅4.5, which is the same as the corresponding diameter of the silicone tube body, so as to facilitate the insertion of the center cavity core rod assembly 4 into the silicone tube body. After confirming that the placement position and angle of the above eight water inlet and outlet cavity core needles 41 meet the requirements, the locking nut is installed at the end of the center cavity sleeve 43 to ensure that the eight water inlet and outlet cavity core needles 41 are not displaced.

[0053] The pressing rubber head catheter 8 is implemented by the following process: before pressing the product rubber head catheter 8, a certain length of silicone tube body (finished product) is prepared, and the silicone tube body has 11 cavities 9, including one urethral cavity 91, eight water inlet and outlet cavities 93, one central cavity 94 and one balloon cavity 92. First, the eight water inlet and outlet cavity needles 41 and the central cavity rod 42 in the central cavity core rod assembly 4 are inserted into the corresponding cavities 9 of the silicone tube body, then the urethral cavity core rod 3 is inserted into the corresponding cavity 9 of the silicone tube body, and finally the balloon cavity core rod 5 is inserted into the corresponding cavity 9 of the silicone tube body. After completion, they are placed together in the corresponding cavity of the lower mold 6, so that the core positioning pin 7 is inserted into the corresponding hole of the urethral cavity core rod 3 and the balloon cavity core rod 5, and the core sleeve positioning pin 44 on the central cavity core rod assembly 4 is embedded in the corresponding groove of the lower mold 6.

[0054] After the above steps are completed, according to the conventional solid silicone pressing mold operation method, a certain amount of solid silicone rubber is placed on the upper surface of the lower mold 6, the urethral cavity core rod 3, the balloon cavity core rod 5 and the central cavity core rod assembly 4, and then the mold 1 is closed. After the mold is closed, the pressing rubber head catheter 8 is pressed according to the process requirements, that is, the product rubber head catheter 8 is pressed at one time.

[0055] The effective effect of the present application: when the cavity 9 is not less than 4, the existing mold (as shown in Figure 2 It is difficult to have enough space to place the water inlet and outlet cavity needles 41, which leads to the difficulty of molding the multi-cavity rubber head catheter 8 by the existing mold. Therefore, the present application solves the problem of difficult molding of the multi-cavity rubber head catheter 8 by embedding the multiple water inlet and outlet cavity needles 41 and the central cavity rod 42, and improves the insertion efficiency of the water inlet and outlet cavity needles 41 by arranging them in a circular step around the central axis of the central cavity rod 42.

[0056] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any changes or replacements within the scope of the disclosed technology can be easily thought of by those skilled in the art, and should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A one-time molding die for a multi-cavity rubber-filled conduit, comprising an upper die (1), a lower die (6), and a rubber-filled conduit (8), characterized in that, The upper mold (1) and the lower mold (6) cooperate to form several cavities. The rubber-tipped catheter (8) includes a silicone tube body (81) and a lumen (82). The silicone tube body is provided with several channels (9) that communicate with the lumen (82). The cavities respectively accommodate the rubber-tipped catheter (8), the catheter lumen mandrel (3), the central lumen mandrel assembly (4), and the balloon lumen mandrel (5). The tail ends are respectively inserted into the cavity (9). The central cavity core rod assembly (4) includes a central cavity core rod (42) and a central cavity outer sleeve (43) sleeved on the central cavity core rod (42). The central cavity outer sleeve (43) is provided with several bending grooves (45) inside. The central cavity outer sleeve (43) is provided with several core needle holes in the circumferential axis. The core needle holes are provided with water inlet and outlet core needles (41). The water inlet and outlet core needles (41) can rotate in the core needle holes. One end of the inlet / outlet water chamber core needle (41) is round, and the other end of the inlet / outlet water chamber core needle (41) is flat. The end of the inlet / outlet water chamber core needle (41) near the flat end is bent outward and set in the bending groove (45) of the outer sleeve (43) of the central cavity.

2. The one-time molding multi-cavity rubber head conduit pressing mold according to claim 1, characterized in that, The inlet and outlet water chamber core needles (41) are arranged in parallel around the central axis of the central chamber core rod (42).

3. The one-time molding multi-cavity rubber head conduit pressing mold according to claim 1, characterized in that, The inlet and outlet water chamber core needles (41) are arranged in a circumferential stepped pattern around the central axis of the central chamber core rod (42).

4. The one-time molding multi-cavity rubber head conduit pressing mold according to claim 3, characterized in that, There is a preset difference in length between adjacent inlet and outlet water chamber core needles (41).

5. The one-time molding multi-cavity rubber head conduit pressing mold according to claim 4, characterized in that, The preset difference between adjacent inlet and outlet water chamber core needles (41) is 4mm, and the length difference between the longest and shortest inlet and outlet water chamber core needles (41) is 28mm.

6. The one-time molding multi-cavity rubber head conduit pressing mold according to claim 1, characterized in that, The lower mold (6) is provided with a positioning pin (2).

7. The one-time molding multi-cavity rubber head conduit pressing mold according to claim 1, characterized in that, The lower mold (6) is provided with a mandrel positioning pin (7).

8. The one-time molding multi-cavity rubber head conduit pressing mold according to claim 1, characterized in that, A core sleeve positioning pin (44) is provided between the central cavity core rod (42) and the central cavity outer sleeve (43).

9. The one-time molding multi-cavity rubber head conduit pressing mold according to any one of claims 1 to 8, characterized in that, The cavity (9) includes a catheterization cavity (91), a balloon cavity (92), a central cavity (94), and eight inlet and outlet cavities (93) for inserting inlet and outlet mandrels (41). The catheterization cavity (91) is used for inserting the catheterization mandrel (3), and the balloon cavity (92) is used for inserting the balloon mandrel (5).

Images