Extrusion die for indwelling needle hose

Abstract

The utility model relates to the technical field of indwelling needle hose processing, and provides an indwelling needle hose extrusion die which comprises a machine head body and a main body pipe material injection body, a spreader is arranged in the machine head body and comprises an outer spreader, a middle spreader and an inner spreader, the inner spreader is matched with a core rod, a pipe body material injection opening is formed in the main body pipe material injection body, and the pipe body material injection opening is communicated with the main body pipe material injection body. The machine head body is provided with a pipe body injection port, the pipe body injection port is communicated with the outer-layer injection channel and the inner-layer injection channel, the machine head body is provided with a developing line injection port, the developing line injection port is communicated with the developing line injection channel, and the outer-layer injection channel, the developing line injection channel and the inner-layer injection channel are matched with the outer spreader, the middle spreader and the inner spreader respectively; the split-flow shuttle comprises the three layers of split-flow shuttle structures including the outer split-flow shuttle, the middle split-flow shuttle and the inner split-flow shuttle, and is provided with the matched material injection runner, so that when different numbers of barium wires are processed, the processing requirement can be met only by replacing the middle split-flow shuttle, and the split-flow shuttle is simple in structure and convenient to operate, and has certain universality.

Description

Technical Field

[0001] The utility model relates to the technical field of indwelling needle hose processing, in particular to an indwelling needle hose extrusion die. Background Art

[0002] An indwelling needle is a product used for intravenous infusion. Its core component is the needle core hose. When producing the indwelling needle hose, it is generally formed by two pellet extrusion molding methods, and 3-6 barium wires are usually arranged around the indwelling needle hose for visualization of the indwelling needle hose.

[0003] In the existing production technology, the extrusion mold structure of the indwelling needle hose is relatively complex, and if different numbers of barium wires need to be extruded when different indwelling needle hoses are molded, most of the accessories in the extrusion mold need to be replaced, which is complicated to operate and has high costs. In addition, the radial position of the barium wire in the existing indwelling needle hose extrusion mold cannot be adjusted, making it difficult to adapt to the production of products with different needs. Utility Model Content

[0004] Based on this, the purpose of the utility model is to provide an indwelling needle hose extrusion die to address the deficiencies of the prior art.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A catheter hose extrusion die comprises a machine head body and a main tube injection body, a diverter shuttle is installed inside the machine head body, and is characterized in that the diverter shuttle comprises an outer diverter shuttle, an intermediate diverter shuttle and an inner diverter shuttle, the inner diverter shuttle cooperates with a core rod, a tube body injection port is provided on the main tube injection body, the tube body injection port is connected with an outer layer injection channel and an inner layer injection channel, a developing line injection port is provided on the machine head body, the developing line injection port is connected with the developing line injection channel, the outer layer injection channel, the developing line injection channel and the inner layer injection channel cooperate with the outer diverter shuttle, the intermediate diverter shuttle and the inner diverter shuttle respectively.

[0007] As a further improvement of the utility model, an outer layer adjustment hole is opened on the outer layer injection channel, and an outer layer adjustment bolt is installed on the outer layer adjustment hole; an inner layer adjustment hole is opened on the inner layer injection channel, and an inner layer adjustment bolt is installed on the inner layer adjustment hole.

[0008] As a further improvement of the utility model, the outer flow channel outside the tube body is provided on the surface of the outer flow shuttle, and the outer injection guide channel is provided on the head body, and the outer injection channel is connected with the outer flow channel outside the tube body through the outer injection guide channel.

[0009] As a further improvement of the utility model, a tube body middle layer flow channel is provided on the surface of the middle diverter shuttle, a middle layer injection guide channel is provided on the outer diverter shuttle, and the developing line injection channel is connected with the tube body middle layer flow channel through the middle layer injection guide channel.

[0010] As a further improvement of the utility model, the surface of the inner diverter shuttle is provided with an inner layer flow channel of the tube body, the head body is provided with a first inner layer injection guide channel, the outer diverter shuttle is provided with a second inner layer injection guide channel, and the middle diverter shuttle is provided with a third inner layer injection guide channel, and the inner layer injection channel is connected with the inner layer flow channel of the tube body through the first inner layer injection guide channel, the second inner layer injection guide channel, and the third inner layer injection guide channel.

[0011] As a further improvement of the present invention, an outer diverter shuttle positioning bolt is provided on the outer diverter shuttle, an outer diverter shuttle positioning groove matching with the outer diverter shuttle positioning bolt is provided on the head body, an intermediate diverter shuttle positioning bolt is provided on the intermediate diverter shuttle, an intermediate diverter shuttle positioning groove matching with the intermediate diverter shuttle positioning bolt is provided on the outer diverter shuttle, an inner diverter shuttle positioning bolt is provided on the inner diverter shuttle, and an inner diverter shuttle positioning groove matching with the inner diverter shuttle positioning bolt is provided on the intermediate diverter shuttle.

[0012] As a further improvement of the utility model, a front pressure cover is installed at the front end of the machine head body, and the interior of the front pressure cover cooperates with the outer diverter shuttle, the middle diverter shuttle, the inner diverter shuttle and the core rod to form a forming flow channel.

[0013] As a further improvement of the utility model, the molding flow channel is communicated with the die, and the die is installed on the front cover through a die cover.

[0014] As a further improvement of the utility model, a fine-tuning isolation groove is provided in the front pressure cover, an isolation plate is provided in the fine-tuning isolation groove, and a fine-tuning bolt penetrating the fine-tuning isolation groove and the isolation plate is threadedly connected to the front pressure cover.

[0015] As a further improvement of the utility model, a diverter shuttle fixing cover and a rear pressure cover are installed at the rear end of the machine head body, and the diverter shuttle fixing cover is threadedly connected to the diverter shuttle pressure cover.

[0016] The beneficial effects of the utility model are:

[0017] 1. The utility model provides an extrusion die for an indwelling needle hose, comprising a three-layer diverter shuttle structure of an outer diverter shuttle, an intermediate diverter shuttle and an inner diverter shuttle, and is provided with a matching injection flow channel. When processing different numbers of barium wires, only the intermediate diverter shuttle needs to be replaced to meet the processing requirements. The utility model has a simple structure, is easy to operate, and has a certain degree of versatility.

[0018] 2. In the utility model, corresponding adjusting bolts are connected to the outer layer injection channel and the inner layer injection channel. The injection speed in the outer layer injection channel and the inner layer injection channel can be adjusted by adjusting the adjusting bolts to change the injection amount of the inner and outer layers, thereby adjusting the position of the middle layer developing line in the tube body, which can adapt to the production of products with different needs.

[0019] 3. In the utility model, corresponding shunt shuttle positioning bolts are respectively provided on the outer and inner shunt shuttles, the middle shunt shuttle and the inner shunt shuttle. The shunt shuttle fixing bolts cooperate with the corresponding shunt shuttle fixing grooves to avoid the shunt shuttle from rotating during operation. The inner shunt shuttle is fixed by the shunt shuttle pressure cover, the inner shunt shuttle squeezes the middle shunt shuttle, the middle shunt shuttle squeezes the outer shunt shuttle, and the outer shunt shuttle is squeezed and fixed to the machine head body to avoid the forward and backward movement of the shunt shuttle during operation. The shunt shuttle positioning and fixing structure is simple and compact, easy to disassemble, and convenient to replace components for processing products with different requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Attached Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0022] Attached Figure 2 It is a cross-sectional view of the overall structure of the utility model.

[0023] Attached Figure 3 It is an exploded view of the overall structure of the utility model.

[0024] In the figure: 1 is the head body, 101 is the developing line injection port, 102 is the developing line injection channel, 103 is the outer layer injection guide channel, 104 is the first inner layer injection guide channel,

[0025] 2 is the main tube injection body, 201 is the tube body injection port, 202 is the outer layer injection channel, 203 is the outer layer adjustment hole, 204 is the inner layer injection channel, 205 is the inner layer adjustment hole,

[0026] 3 is an outer flow shuttle, 301 is an outer layer flow channel of the tube body, 302 is a middle layer injection guide channel, 303 is a second inner layer injection guide channel, 304 is an outer flow shuttle positioning bolt,

[0027] 4 is the middle flow shuttle, 401 is the middle flow channel of the tube body, 402 is the third inner layer injection guide channel, 403 is the middle flow shuttle positioning bolt,

[0028] 5 is the inner flow shuttle, 501 is the inner flow channel of the tube body, 502 is the positioning bolt of the inner flow shuttle,

[0029] 6 is a core rod, 7 is an outer layer adjusting bolt, 8 is an inner layer adjusting bolt, 9 is a front pressure cover, 901 is a molding flow channel, 902 is a fine-tuning isolation groove, 10 is a die, 11 is a die pressure cover, 12 is an isolation plate, 13 is a fine-tuning bolt, 14 is a diverter shuttle fixing cover, 15 is a diverter shuttle pressure cover, and 16 is a rear pressure cover. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of 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.

[0031] like Figure 1 As shown, an indwelling needle hose extrusion mold includes a head body 1 and a main tube injection body 2, a diverter shuttle is installed inside the head body 1, and is characterized in that the diverter shuttle includes an outer diverter shuttle 3, an intermediate diverter shuttle 4 and an inner diverter shuttle 5, the inner diverter shuttle 5 cooperates with a core rod 6, a tube body injection port 201 is opened on the main tube injection body 2, the tube body injection port 201 is connected with an outer layer injection channel 202 and an inner layer injection channel 204, a developing line injection port 101 is opened on the head body 1, the developing line injection port 101 is connected with the developing line injection channel 102, the outer layer injection channel 202, the developing line injection channel 102, and the inner layer injection channel 204 cooperate with the outer diverter shuttle 3, the intermediate diverter shuttle 4, and the inner diverter shuttle 5 respectively.

[0032] Preferably, the developing line injection port 101 can also be used to add other materials such as reinforcing ribs.

[0033] In a specific embodiment, further, the outer layer injection channel 202 is provided with an outer layer adjustment hole 203, and the outer layer adjustment bolt 7 is installed on the outer layer adjustment hole 203; the inner layer injection channel 204 is provided with an inner layer adjustment hole 205, and the inner layer adjustment bolt 8 is installed on the inner layer adjustment hole 205; the outer layer adjustment bolt 7 and the inner layer adjustment bolt 8 are used to adjust the inner layer injection flow rate and the outer layer injection flow rate, thereby changing the ratio of the inner and outer layers.

[0034] In a specific embodiment, further, the outer diversion shuttle 3 has an outer tube body layer flow channel 301 on its surface, the head body 1 has an outer layer injection guide channel 103, and the outer layer injection channel 202 is connected to the outer tube body layer flow channel 301 through the outer layer injection guide channel 103.

[0035] In a specific embodiment, further, a tube body middle layer flow channel 401 is opened on the surface of the intermediate diversion shuttle 4, a middle layer injection guide channel 302 is opened on the outer diversion shuttle 3, and the developing line injection channel 102 is connected with the tube body middle layer flow channel 401 through the middle layer injection guide channel 302.

[0036] In a specific embodiment, further, the surface of the inner diverter shuttle 5 is provided with an inner layer flow channel 501 of the tube body, the head body 1 is provided with a first inner layer injection guide channel 104, the outer diverter shuttle 3 is provided with a second inner layer injection guide channel 303, and the middle diverter shuttle 4 is provided with a third inner layer injection guide channel 402, and the inner layer injection channel 204 is connected with the inner layer flow channel 501 of the tube body through the first inner layer injection guide channel 104, the second inner layer injection guide channel 303, and the third inner layer injection guide channel 402.

[0037] In a specific embodiment, further, an outer diverter shuttle 3 is provided with an outer diverter shuttle positioning bolt 304, an outer diverter shuttle positioning groove matched with the outer diverter shuttle positioning bolt 304 is provided on the head body 1, an intermediate diverter shuttle positioning bolt 403 is provided on the intermediate diverter shuttle 4, an intermediate diverter shuttle positioning groove matched with the intermediate diverter shuttle positioning bolt 403 is provided on the outer diverter shuttle 3, an inner diverter shuttle positioning bolt 502 is provided on the inner diverter shuttle 5, and an inner diverter shuttle positioning groove matched with the inner diverter shuttle positioning bolt 502 is provided on the intermediate diverter shuttle 4. The diverter shuttle is prevented from rotating by cooperating with the positioning bolt and the positioning groove, thereby ensuring that the guide channel between the injection channel and the injection flow channel is unobstructed and does not get blocked.

[0038] In a specific embodiment, further, a front pressure cover 9 is installed at the front end of the head body 1, and the interior of the front pressure cover 9 cooperates with the outer diversion shuttle 3, the middle diversion shuttle 4, the inner diversion shuttle 5 and the core rod 6 to form a forming flow channel 901.

[0039] In a specific embodiment, further, the molding flow channel 901 is connected to the die 10 , and the die 10 is installed on the front cover 9 through the die cover 11 .

[0040] In a specific embodiment, further, a fine-tuning isolation groove 902 is provided in the front pressure cover 9, and an isolation plate 12 is provided in the fine-tuning isolation groove 902. The isolation plate 12 is used to limit the fine-tuning adjustment range to prevent the front pressure cover 9 from being deformed and unable to recover due to excessive adjustment. A fine-tuning bolt 13 that passes through the fine-tuning isolation groove 902 and the isolation plate 12 is threadedly connected on the front pressure cover 9, and the fine-tuning bolt 13 is used to squeeze the front pressure cover 9 to adjust the extrusion position of the tube body.

[0041] In a specific embodiment, further, a diverter shuttle fixing cover 14 and a rear pressure cover 16 are installed at the rear end of the head body 1, and the diverter shuttle fixing cover 14 is threadedly connected to the diverter shuttle pressure cover 15, and the diverter shuttle pressure cover 15 squeezes the inner diverter shuttle 5, the inner diverter shuttle 5 squeezes the middle diverter shuttle 4, the middle diverter shuttle 4 squeezes the outer diverter shuttle 3, and the outer diverter shuttle 3 is squeezed and fixed to the head body 1.

[0042] The specific working process of the extrusion die is as follows:

[0043] Turn on the extrusion equipment and start heating. When the temperature reaches the set value, start extruding the tube. Check whether the tube wall thickness is uniform. If it is not uniform, adjust the wall thickness. Then adjust the tube diameter and barium wire size by adjusting the extruder extrusion speed, traction speed and other process parameters. When the size reaches the set value, adjust and confirm the position of the developing line. When it meets the requirements, start normal production. The specific operation steps are as follows:

[0044] First, the main tube extruder and the developing line extruder are turned on in sequence to increase the temperature. When the temperature reaches the set temperature, extrusion begins. The main tube material passes through the tube body injection port 201, and a part of the pellets enter the outer layer injection channel 202, and the other part enters the inner layer injection channel 204. After passing through the flow channels of the outer diverter shuttle 3 and the inner diverter shuttle 5, the pellets are mixed with the barium strands of the developing line material extruder through the middle diverter shuttle 4, enter the molding flow channel 901, and are extruded through the die 10 and the core rod 6 to form the pellets.

[0045] When the wall thickness of the extruded tube is uneven, the wall thickness of the tube is adjusted by fine-tuning the bolt 13 until the wall thickness of the tube is uniform, and then the extrusion speed, pulling speed and other process parameters are adjusted to achieve the extruded tube size meeting the inner and outer diameter requirements;

[0046] If the position of the developing line is not ideal, the position of the developing line is adjusted by adjusting the outer layer adjusting bolt 7 or the inner layer adjusting bolt 8 until it meets the technical requirements and normal production is carried out.

[0047] It can be understood that the above specific description of the utility model is only used to illustrate the utility model and is not limited to the technical solution described in the embodiments of the utility model. Ordinary technicians in the field should understand that the utility model can still be modified or replaced by equivalents to achieve the same technical effect; as long as the use requirements are met, they are within the protection scope of the utility model.

[0048] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

Claims

1. An indwelling needle hose extrusion die, comprising a die body (1) and a main tube injection body (2), wherein a diverter shuttle is installed inside the die body (1), characterized in that: The diverter shuttle comprises an outer diverter shuttle (3), an intermediate diverter shuttle (4) and an inner diverter shuttle (5); the inner diverter shuttle (5) cooperates with a core rod (6); a tube body injection port (201) is provided on the main tube injection body (2); the tube body injection port (201) is connected to an outer layer injection channel (202) and an inner layer injection channel (204); a developing line injection port (101) is provided on the head body (1); the developing line injection port (101) is connected to the developing line injection channel (102); the outer layer injection channel (202), the developing line injection channel (102) and the inner layer injection channel (204) cooperate with the outer diverter shuttle (3), the intermediate diverter shuttle (4) and the inner diverter shuttle (5) respectively.

2. The indwelling needle hose extrusion die according to claim 1, characterized in that: The outer layer injection channel (202) is provided with an outer layer adjustment hole (203), and an outer layer adjustment bolt (7) is installed on the outer layer adjustment hole (203); the inner layer injection channel (204) is provided with an inner layer adjustment hole (205), and an inner layer adjustment bolt (8) is installed on the inner layer adjustment hole (205).

3. The indwelling needle hose extrusion die according to claim 1, characterized in that: The outer flow channel (301) outside the tube body is provided on the surface of the outer flow shuttle (3), an outer injection guide channel (103) is provided on the head body (1), and the outer injection channel (202) is connected to the outer flow channel (301) outside the tube body through the outer injection guide channel (103).

4. The indwelling needle hose extrusion die according to claim 1, characterized in that: The surface of the intermediate flow-dividing shuttle (4) is provided with a tube body middle-layer flow channel (401), the outer flow-dividing shuttle (3) is provided with a middle-layer injection guide channel (302), and the developing line injection channel (102) is connected to the tube body middle-layer flow channel (401) through the middle-layer injection guide channel (302).

5. The indwelling needle hose extrusion die according to claim 1, characterized in that: The inner flow-dividing shuttle (5) is provided with an inner flow channel (501) on its surface, the machine head body (1) is provided with a first inner material injection guiding channel (104), the outer flow-dividing shuttle (3) is provided with a second inner material injection guiding channel (303), and the middle flow-dividing shuttle (4) is provided with a third inner material injection guiding channel (402), and the inner material injection channel (204) is connected to the inner flow channel (501) of the tube body via the first inner material injection guiding channel (104), the second inner material injection guiding channel (303), and the third inner material injection guiding channel (402).

6. The indwelling needle hose extrusion die according to claim 1, characterized in that: The outer diverter shuttle (3) is provided with an outer diverter shuttle positioning bolt (304), the machine head body (1) is provided with an outer diverter shuttle positioning groove matched with the outer diverter shuttle positioning bolt (304), the middle diverter shuttle (4) is provided with an middle diverter shuttle positioning bolt (403), the outer diverter shuttle (3) is provided with an middle diverter shuttle positioning groove matched with the middle diverter shuttle positioning bolt (403), the inner diverter shuttle (5) is provided with an inner diverter shuttle positioning bolt (502), and the middle diverter shuttle (4) is provided with an inner diverter shuttle positioning groove matched with the inner diverter shuttle positioning bolt (502).

7. The indwelling needle hose extrusion die according to claim 1, characterized in that: A front pressure cover (9) is installed at the front end of the machine head body (1), and the interior of the front pressure cover (9) cooperates with the outer flow-dividing shuttle (3), the middle flow-dividing shuttle (4), the inner flow-dividing shuttle (5) and the core rod (6) to form a forming flow channel (901).

8. The indwelling needle tube extrusion die according to claim 7, characterized in that: The molding flow channel (901) is connected to the mouth die (10), and the mouth die (10) is installed on the front pressure cover (9) through the mouth die pressure cover (11).

9. The indwelling needle tube extrusion die according to claim 7, characterized in that: A fine-tuning isolation groove (902) is provided in the front gland (9), an isolation plate (12) is provided in the fine-tuning isolation groove (902), and a fine-tuning bolt (13) penetrating the fine-tuning isolation groove (902) and the isolation plate (12) is threadedly connected to the front gland (9).

10. The indwelling needle tube extrusion die according to claim 1, characterized in that: A diverter shuttle fixing cover (14) and a rear pressing cover (16) are installed at the rear end of the machine head body (1), and the diverter shuttle fixing cover (14) and the diverter shuttle pressing cover (15) are threadedly connected.

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