Inner side developing catheter manufacturing mold

Abstract

The utility model discloses an inner side developing catheter manufacturing mold, and belongs to the technical field of medical instruments. The device mainly comprises a forming mechanism, the forming mechanism comprises an extruder, an extrusion assembly is installed at the discharging end of the extruder, the extrusion assembly comprises an extrusion head, the extrusion head is provided with a first flow channel, and the first flow channel is connected with a discharging port of a first extruder; the base is fixedly mounted at the bottom of the extrusion head, and a first inclined runner obliquely penetrating through the base is arranged on one side of the base; a mold assembly including a developing wire plate; the die sleeve is fixedly arranged at the bottom of the developing line plate; and the size of the mold core is smaller than that of the cavity. According to the inner side developing catheter manufacturing mold, the extrusion assembly and the mold assembly are matched with each other, so that when the developing catheter is manufactured, developing polyurethane is located on the inner side of the catheter, and the effect of avoiding direct contact between barium sulfate and toner and human mucous membrane tissue is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a mold for manufacturing an inner developing catheter. Background Art

[0002] The nasogastric tube is a medical device widely used for postoperative enteral feeding. To ensure that the tube is inserted into the predetermined position, it is usually necessary to confirm it with an X-ray machine, which requires the tube to have a development function. Usually, a side development line is added inside the tube. Therefore, when processing the tube, a certain proportion of barium sulfate and color powder are added to the polyurethane for blending and granulation, and then extruded into a tube through a single-screw extruder double-color composite die.

[0003] However, in the prior art, most manufacturers place the side developing line on the outer surface, which has the following disadvantages:

[0004] 1. Since the barium sulfate may not be completely dispersed during the blending and granulation process, some of the undispersed barium sulfate may be mixed into the catheter, resulting in bulges on the catheter surface, which may cause discomfort to the patient when in contact with the patient;

[0005] 2. During the process of feeding liquid food, the nurse usually needs to fold the catheter to temporarily close the catheter. According to the retention time of one month, the tube needs to be folded many times. At this time, the mechanical strength of the polyurethane with added barium sulfate and color powder will decrease to a certain extent. If the crease is exactly at the developing line, it is very easy to crack and cause leakage.

[0006] Therefore, it is necessary to provide a design of a side developing conduit and a composite extrusion die in which the developing line is located on the inner wall of the conduit to solve the above problems.

[0007] It should be noted that the above information disclosed in this background technology section is only for understanding the background technology of the present application concept, and therefore, it may contain information that does not constitute the prior art. Summary of the invention

[0008] Based on the above problems existing in the prior art, the problem to be solved by the present application is: to provide a mold for manufacturing an inner developing catheter, so as to achieve the effect of preventing barium sulfate and toner from directly contacting the human mucosal tissue.

[0009] The technical solution adopted by the present application to solve its technical problems is: a mold for making an inner developing duct, including a molding mechanism, the molding mechanism includes an extruder, and the discharge end of the extruder is equipped with an extrusion assembly, the extrusion assembly includes: an extrusion head, the extrusion head is provided with a first flow channel, the first flow channel is connected to the discharge port of the first extruder; a base, the base is fixedly installed at the bottom of the extrusion head, one side of the base is provided with a first inclined flow channel obliquely penetrating the base, the first flow channel is connected to the first inclined flow channel; a mold assembly, the mold assembly includes a developing line plate; a mold sleeve, the mold sleeve is fixedly installed at the bottom of the developing line plate, and a cavity is arranged inside the mold sleeve; a mold core, the size of the mold core is smaller than the size of the cavity.

[0010] Furthermore, a connector is provided on one side of the first flow channel, and the connector is connected to the top end of the mold core.

[0011] Furthermore, a through hole is provided through the bottom end of the chamber, and a protrusion is extended from the bottom of the mold core, and the radius of the protrusion is smaller than the radius of the through hole.

[0012] Furthermore, a second flow channel is provided on one side of the base, the second flow channel runs through the base, a second oblique flow channel is provided on the developing line plate, and the second oblique flow channel is connected to the second flow channel.

[0013] Furthermore, a molding cavity is provided between the mold core and the cavity, and the first flow channel is connected to the molding cavity.

[0014] The beneficial effect of the present application is that the present application provides a mold for manufacturing an inner developing catheter, which cooperates with the extrusion component and the mold component so that when the developing catheter is manufactured, the developing polyurethane is located on the inner side of the catheter, thereby achieving the effect of preventing barium sulfate and color powder from directly contacting the human mucosal tissue.

[0015] In addition to the above-described purposes, features and advantages, the present application also has other purposes, features and advantages. The present application will be further described in detail with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings in the specification, which constitute a part of the present application, are used to provide further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0017] In the attached picture:

[0018] Figure 1 This is an overall schematic diagram of a mold for making an inner side imaging catheter in the present application;

[0019] Figure 2 for Figure 1 Schematic diagram of the internal structure of the extrusion component;

[0020] Figure 3 for Figure 1 The structural diagram of the middle mold assembly;

[0021] Figure 4 for Figure 3 Exploded diagram of the die assembly;

[0022] Figure 5 for Figure 1 Schematic diagram of the internal structure of the mold produced;

[0023] Figure 6 for Figure 5 The enlarged schematic diagram of point A in the middle;

[0024] Among them, the reference numerals in the figure are:

[0025] 1. Extrusion assembly; 11. Extrusion head; 12. First flow channel; 13. Connector; 2. Base; 21. Second flow channel; 22. First oblique flow channel; 23. Inner cavity; 3. Mold assembly; 31. Developing line plate; 311. Second oblique flow channel; 32. Mold sleeve; 321. Chamber; 33. Mold core; 331. Bump; 33. Mold core; 331. Bump; 332. Connector; 333. Straight cylinder; 334. Conical cylinder; 4. Through hole; 5. Molding cavity. DETAILED DESCRIPTION

[0026] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0027] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0028] like Figure 1 As shown, the present application provides a mold for making an inner developing duct, including a molding mechanism, which includes a first extruder (not shown in the figure), the first extruder is used to extrude transparent polyurethane outward, the discharge port of the first extruder is provided with an extrusion component 1, the extrusion component 1 is installed at the discharge port of the extruder, and is used to transport the transparent polyurethane material that reaches the melting temperature to the outside, and at the same time, a second extruder (not shown in the figure) is arranged on one side of the first extruder, and the second extruder is used to extrude developing polyurethane outward, and at the same time, a mold assembly 3 is arranged at the bottom of the extrusion assembly 1, and the mold assembly 3 is used to make the inner developing duct.

[0029] like Figure 2 As shown, the extrusion assembly 1 includes an extrusion head 11, a first flow channel 12 is provided on the extrusion head 11, and the first flow channel 12 is connected to the discharge port of the first extruder, and is used to extrude the transparent polyurethane into the mold assembly 3. A connector 13 is provided on one side of the extrusion head 11, and the connector 13 is used to connect to the mold assembly 3;

[0030] At the same time, a base 2 is fixedly installed at the bottom of the extruder head 11 by bolts, and an inner cavity 23 is provided through the center of the base 2. The radius of the connector 13 is smaller than the radius of the inner cavity 23. When the connector 13 is placed in the inner cavity 23, the connector 13 and the inner cavity 23 do not contact each other and a certain gap is left;

[0031] At the same time, a first oblique flow channel 22 obliquely penetrating the base 2 is provided on one side of the base 2, and the first flow channel 12 is connected to the first oblique flow channel 22 to form a first extrusion channel, through which the transparent polyurethane enters between the connector 13 and the inner cavity 23.

[0032] Meanwhile, a second flow channel 21 is provided on one side of the base 2 . The second flow channel 21 passes through the base 2 , and one end of the second flow channel 21 on the outside is connected to the discharge port of the second extruder for conveying the developing polyurethane into the mold assembly 3 .

[0033] like Figure 3-Figure 6 As shown, the mold assembly 3 includes a developing line plate 31, on which a second inclined flow channel 311 is obliquely provided. The second inclined flow channel 311 is connected to an end of the second flow channel 21 away from the second extruder to form a second extrusion channel.

[0034] At the same time, a mold sleeve 32 is fixedly installed at the bottom of the developing line plate 31, and a cavity 321 is arranged inside the mold sleeve 32. The cavity 321 is divided into a straight cavity and a tapered cavity from high to low, and the straight cavity is connected to the tapered cavity. At the same time, a through hole 4 is arranged at the bottom end of the tapered cavity.

[0035] Meanwhile, a mold core 33 is installed in the mold sleeve 32, and the mold core 33 includes a connecting block 332, and the connecting block 332 is used to connect with the connector 13. Meanwhile, a straight cylinder 333 is arranged at the bottom of the connecting block 332, and the radius of the straight cylinder 333 is smaller than the radius of the straight cavity. Meanwhile, a conical cylinder 334 is connected to the bottom of the straight cylinder 333, and the radius of the conical cylinder 334 is also smaller than the radius of the conical cavity. Meanwhile, a convex block 331 is extended at the bottom of the mold core 33, and the radius of the convex block 331 is smaller than the radius of the through hole 4.

[0036] During installation, the top of the mold core 33 is fixedly connected to the connector 13, and then the mold core 33 is installed into the connector 13 and extended into the mold sleeve 32. The straight cylinder 333, the conical cylinder 334 and the protrusion 331 do not contact the straight cavity, the conical cavity and the through hole 4 and leave a certain gap. At this time, the gap between the straight cylinder 333 and the straight cavity is the first cavity, and the gap between the conical cylinder 334 and the conical cavity is the second cavity, and the gap between the protrusion 331 and the through hole 4 is the molding cavity 5.

[0037] When the product is produced, the extrusion temperature of the first extruder and the second extruder is first set to 170-180°C, the speed of the first extruder is set to 30-40r / min, the speed of the second extruder is set to 5-10r / min, and the traction speed is 6-12m / min;

[0038] At the same time, the transparent photosensitive polyurethane output by the first extruder enters the first chamber through the first extrusion channel, and the developing polyurethane output by the second extruder enters the first chamber through the second extrusion channel. Since the second inclined flow channel 311 is inclined, the developing polyurethane will flow into the side close to the mold core 33. The two groups of materials are mixed in the first chamber and then flow into the second chamber. Finally, they are quantitatively and evenly discharged through the molding cavity 5, and are formed into an inner developing duct after cooling.

[0039] After the development catheter is completed, a burst pressure test is required. The test method is as follows:

[0040] Test equipment / tools: punching machine, 50ml feeder, stomach tube after folding 800 times: outer developing tube X, penetrating developing tube Y, inner developing tube Z.

[0041] A certain volume of water is drawn through the feeder, connected to the stomach tube connector, the tube is closed, and the punching machine is connected to a certain pressure of gas, the pressure is set to 150kPa, 200kPa, 250kPa, 300kPa. When the foot switch is pressed, the punch presses the feeder rod to push the water into the tube, and then the tube bursting pressure is tested. The comparison of the test tube and the test results are as follows:

[0042]

[0043] In summary, the device cooperates the extrusion component 1 and the mold component 3 so that when the developing catheter is completed, the developing polyurethane is located on the inner side of the catheter, thereby avoiding direct contact between the developing material and the mucous membrane tissue of the human body, and at the same time improving the bursting strength of the catheter when the nurse bends the catheter.

[0044] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A mold for manufacturing an inner side imaging duct, comprising a molding mechanism, characterized in that: The forming mechanism comprises: An extruder, wherein an extrusion assembly (1) is installed at the discharge end of the extruder, and the extrusion assembly (1) comprises: An extrusion head (11), wherein the extrusion head (11) is provided with a first flow channel (12), wherein the first flow channel (12) is connected to a discharge port of a first extruder; A base (2), the base (2) being fixedly mounted on the bottom of the extruder head (11), a first oblique flow channel (22) obliquely penetrating the base (2) being provided on one side of the base (2), the first flow channel (12) being in communication with the first oblique flow channel (22); A mold assembly (3), the mold assembly (3) comprising: Development line plate (31); A mold sleeve (32), the mold sleeve (32) is fixedly mounted on the bottom of the developing line plate (31), and a chamber (321) is provided inside the mold sleeve (32); A mold core (33), the size of the mold core (33) is smaller than the size of the cavity (321).

2. The inner side imaging duct manufacturing mold according to claim 1, characterized in that: A connector (13) is provided on one side of the first flow channel (12), and the connector (13) is connected to the top end of the mold core (33).

3. The inner side imaging duct manufacturing mold according to claim 2, characterized in that: A through hole (4) is provided at the bottom end of the chamber (321), and a convex block (331) is extended from the bottom of the mold core (33), wherein the radius of the convex block (331) is smaller than the radius of the through hole (4).

4. The inner side imaging duct manufacturing mold according to claim 3, characterized in that: A second flow channel (21) is provided on one side of the base (2), the second flow channel (21) passes through the base (2), and a second oblique flow channel (311) is provided on the developing line plate (31), the second oblique flow channel (311) is connected to the second flow channel (21).

5. The inner side imaging duct manufacturing mold according to claim 4, characterized in that: A molding cavity (5) is provided between the mold core (33) and the chamber (321), and the first flow channel (12) is communicated with the molding cavity (5).

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