Coated guide wire extrusion molding device

Abstract

The utility model relates to the field of medical supplies, in particular to a coated guide wire extrusion molding device which comprises an extrusion assembly and a secondary molding assembly, the extrusion assembly comprises an extrusion channel and a primary die head, the primary die head is arranged at an outlet of the extrusion channel and communicated with the extrusion channel, and the secondary molding assembly comprises a metal sleeve, a heating lantern ring and a secondary die head. The heating sleeve is annularly sleeved on the outer wall of the metal sleeve, the metal sleeve is sleeved on the outer wall of the secondary die head, the primary die head is provided with a primary molding channel, the secondary die head is provided with a secondary molding channel, and the extrusion channel, the primary molding channel and the secondary molding channel are arranged on the same straight line. By adopting the secondary molding structure, the extruded guide wire is subjected to secondary molding, so that the outer diameter of the metal wire is only influenced by the caliber of the die head, the appearance of the metal wire is remolded, the secondary molding of the metal wire is not influenced by overflowing polyurethane, and the molding of the appearance of the guide wire is ensured.

Description

Technical Field

[0001] The utility model relates to the field of medical supplies, in particular to a guide wire covering and molding device. Background Art

[0002] A guidewire is a device used for interventional treatment. Generally, the guidewire enters the blood vessel and reaches the designated lesion location, providing a "track"-like guiding function and a certain degree of support for the interventional devices (including but not limited to balloons and stents) that need to enter later.

[0003] In the conventional extrusion coating production process, the polyurethane coated on the metal wire is molded through a die. In the case of high-pressure extrusion, the extrusion pressure will affect the molding process, and the polyurethane will actively overflow the die, resulting in uneven outer diameter of the coated guide wire and occasional scaly defects on the surface. The appearance and outer diameter of the guide wire do not meet the requirements.

[0004] The technical problem to be solved by this application is: how to ensure the shaping of the appearance of the guide wire. Utility Model Content

[0005] In order to overcome the deficiencies of the prior art, the utility model aims to provide a coated guide wire extrusion molding device.

[0006] The technical solution adopted by the utility model is: a coated guide wire extrusion molding device, including an extrusion component and a secondary molding component, the extrusion component includes an extrusion channel and a primary die head, the primary die head is arranged at the outlet of the extrusion channel and is connected with the extrusion channel, the secondary molding component includes a metal sleeve, a heating sleeve ring and a secondary die head, the heating sleeve ring is sleeved on the outer wall of the metal sleeve, the metal sleeve is sleeved on the outer wall of the secondary die head, the primary die head is provided with a primary molding channel, the secondary die head is provided with a secondary molding channel, and the extrusion channel, the primary molding channel and the secondary molding channel are arranged on the same straight line.

[0007] In some embodiments, the extrusion channel is arranged in the extrusion seat, the heating sleeve is fixedly connected to the extrusion seat through a connecting piece, the connecting piece is provided with a plurality of linearly arranged mounting holes, and the connecting piece is detachably connected to the extrusion seat through the mounting holes and screws.

[0008] In some embodiments, a temperature controller is included, and the secondary die is provided with a temperature sensor for detecting the temperature of the secondary die, and the temperature sensor is communicatively connected with the temperature controller.

[0009] In some embodiments, a certain distance is set between the primary die and the secondary die.

[0010] The beneficial effects of the utility model are:

[0011] The coated guide wire extrusion molding device adopts a secondary molding structure to perform secondary molding on the extruded guide wire, so that the outer diameter of the metal wire is only affected by the caliber of the die head and the appearance is reshaped. The overflowed polyurethane will not affect the secondary molding of the metal wire, thereby ensuring the molding of the appearance of the guide wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 It is a schematic diagram of the explosion of the structure of the utility model;

[0014] The numbers and names in the figure correspond to each other as follows: 1. Extrusion assembly; 2. Secondary molding assembly; 3. Temperature controller; 11. Extrusion seat; 12. Primary die; 21. Metal sleeve; 22. Heating ring; 23. Secondary die; 24. Connector. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] See also Figure 1 The utility model provides a technical solution: a coated guide wire extrusion molding device, including an extrusion component 1, a secondary molding component 2 and a temperature controller 3.

[0017] The extrusion assembly 1 includes an extrusion seat 11 and a primary die 12 . The extrusion seat 11 is provided with an extrusion channel, which is arranged inside and passes through the extrusion seat 11 . The primary die 12 is arranged at the outlet of the extrusion channel, and the extrusion channel is communicated with the primary die 12 .

[0018] The secondary molding component 2 includes a metal sleeve 21, a heating sleeve ring 22 and a secondary die 23. The heating sleeve ring 22 is fixedly sleeved on the outer wall of the secondary die 23. The heating sleeve ring 22 is responsible for fixing the secondary die 23. The heating sleeve ring 22 is fixedly connected to the extrusion seat 11 through a connecting piece 24. The heating sleeve ring 22 is fixedly sleeved on the outer wall of the metal sleeve 21. The heating sleeve ring 22 heats the metal sleeve 21. The metal sleeve 21 ensures the temperature of the secondary die 23. In order to further measure the temperature of the secondary die 23, the secondary die 23 is provided with a temperature sensor for detecting the temperature of the secondary die 23. The temperature sensor is fixedly arranged on the connecting piece 24. The temperature sensor is connected to the temperature controller 3 in communication. The temperature controller 3 is responsible for controlling the heating work of the heating sleeve ring 22, and then controlling the temperature of the secondary die 23. The connecting piece 24 is provided with a plurality of mounting holes, and the plurality of mounting holes are arranged in a straight line. The connecting piece 24 is detachably connected to the extrusion seat 11 through the mounting holes and screws. The distance between the primary die 12 and the secondary die 23 can be changed by changing the connection with different mounting holes.

[0019] The primary die 12 is provided with a primary molding channel, the secondary die 23 is provided with a secondary molding channel, the extrusion channel, the primary molding channel and the secondary molding channel are arranged on the same straight line, the extrusion channel and the primary molding channel are connected, and a certain distance is set between the primary die 12 and the secondary die 23, and the metal wire passes through the extrusion channel, the primary molding channel and the secondary molding channel in sequence.

[0020] The working principle and use process of the utility model: The temperature controller 3 determines whether the heating sleeve 22 needs to be heated according to the temperature measured by the temperature sensor. When the temperature does not reach the set temperature, the heating sleeve 22 is continuously controlled to generate heat, which is used to heat the metal sleeve 21 and the secondary die 23, and stabilize the temperature of the secondary die 23 at the set temperature. The metal wire enters from the entrance of the extrusion channel, passes through the extrusion channel, the primary molding channel and the secondary molding channel in sequence, and the metal wire is continuously pulled out, while the surface is coated with polyurethane. After the metal wire is pulled out from the primary molding channel, if the appearance and size of the metal wire do not meet the requirements, the metal wire continues to pass through the secondary molding channel, and the secondary molding channel reshapes the appearance of the material and controls the size within the required range. After the metal wire is molded twice, the appearance and outer diameter of the surface coated with the metal wire meet the requirements.

[0021] Finally, it should be noted that the above description is only a preferred example of the present utility model and is not intended to limit the present utility model. Although the present utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A coated guide wire extrusion molding device, comprising an extrusion assembly (1), characterized in that: The extrusion molding device comprises a secondary molding component (2), the extrusion component (1) comprises an extrusion channel and a primary die (12), the primary die (12) is arranged at the outlet of the extrusion channel and is connected to the extrusion channel, the secondary molding component (2) comprises a metal sleeve (21), a heating sleeve ring (22) and a secondary die (23), the heating sleeve ring (22) is sleeved on the outer wall of the metal sleeve (21), the metal sleeve (21) is sleeved on the outer wall of the secondary die (23), the primary die (12) is provided with a primary molding channel, the secondary die (23) is provided with a secondary molding channel, and the extrusion channel, the primary molding channel and the secondary molding channel are arranged on the same straight line.

2. The coated guide wire extrusion molding device according to claim 1, characterized in that: The extrusion channel is arranged in the extrusion seat (11), the heating sleeve ring (22) is fixedly connected to the extrusion seat (11) via a connecting piece (24), the connecting piece (24) is provided with a plurality of mounting holes arranged in a straight line, and the connecting piece (24) is detachably connected to the extrusion seat (11) via the mounting holes and screws.

3. The coated guide wire extrusion molding device according to claim 1, characterized in that: It comprises a temperature controller (3), the secondary die head (23) is provided with a temperature sensor for detecting the temperature of the secondary die head (23), and the temperature sensor is communicatively connected with the temperature controller (3).

4. The coated guide wire extrusion molding device according to claim 1, characterized in that: A certain distance is set between the primary die head (12) and the secondary die head (23).

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