Embedded needle-free medicine tube
By pre-embedding of inserts with injection holes during injection molding of needle-free medicine tubes, the problems of unstable molding and low yield due to too small injection holes in the existing needle-free medicine tubes are solved, and more stable molding and higher yield rates are achieved.
Patent Information
- Application Number
- CN202420888503.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-25
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-04-25
AI Technical Summary
The injection hole diameter formed by the existing needle-free medicine tubes during the injection molding process is too small, resulting in unstable molding, unrounded injection holes, easy to produce flashes, and low yield.
The embedded needle-free medicine tube design is adopted. By embedding inserts with injection holes during the injection molding process, instead of forming injection holes during the injection molding process, ensuring the roundness and stability of the injection holes.
The molding stability of the needle-free medicine tube is improved, the roundness of the injection hole is ensured, and the generation of flashes is avoided, thereby significantly improving the yield rate.
Smart Images
Figure CN222983465U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of medical devices, in particular to a pre-embedded needleless medicine tube. Background Art
[0002] The front end of the existing needleless medicine tube has an injection hole, and the aperture of the injection hole is generally small to ensure that the medicine penetrates the skin surface at an extremely fast speed and enters the subcutaneous or muscle tissue to achieve the injection effect.
[0003] During the injection molding process, too small an aperture will cause the molding of the needleless medicine tube to be unstable, resulting in the injection hole not being circular or generating flash, reducing the yield.
[0004] Therefore, there is a need for further improvement in the existing needleless medicine tube.
[0005] The information disclosed in the background section of the present utility model is only intended to enhance the understanding of the overall background of the present utility model, and should not be regarded as an admission or any form of suggestion that this information constitutes prior art already known to those of ordinary skill in the art. Summary of the Utility Model
[0006] The purpose of the present utility model is to provide a pre-embedded needleless medicine tube. By using an insert with an injection hole to replace the formation of the injection hole during the injection molding process, the formation of the injection hole during the injection molding process is avoided, making the molding of the needleless medicine tube more stable, ensuring the roundness of the injection hole, and avoiding the generation of flash, thereby improving the yield.
[0007] The present utility model provides a pre-embedded needleless medicine tube, comprising: a receiving part; an injection part disposed at the front end of the receiving part; and an insert disposed at the front end of the injection part and having a through injection hole.
[0008] Preferably, the length range of the insert is 1.9 - 2.1 mm.
[0009] Preferably, the outer diameter range of the insert is 0.5 - 0.7 mm.
[0010] Preferably, the inner diameter range of the insert is 0.1 - 0.2 mm.
[0011] Preferably, the receiving part has a receiving space, the injection part has an injection space, the injection space communicates with the receiving space, the rear end of the injection hole communicates with the injection space, and the front end of the injection hole communicates with the outside.
[0012] Preferably, the taper range of the injection space is 11.9 - 12.1 degrees.
[0013] Preferably, the embedded needleless medicine tube is prepared by a mold, which includes: a first mold body having a first cavity; a second mold body having a second cavity; a mold core installed in the first cavity, and the front end of the mold core can extend into the second cavity after the first mold body and the second mold body are closed; and an insert that can be embedded at the front end of the mold core before closing the mold. The insert has an injection hole and can remain in the medicine tube after injection molding.
[0014] Preferably, the front end of the mold core has a mold core tip, and the mold core tip can extend into the second cavity after the first mold body and the second mold body are closed.
[0015] Preferably, the first mold body includes a first mold base and a male mold core. The first mold base is installed on a first machine tool, and the male mold core is installed on the first mold base.
[0016] Preferably, on the side of the male mold core facing the second mold body, there is a first accommodation space, and two symmetric sliders are arranged in the first accommodation space, and the two sliders can slide along the first accommodation space.
[0017] In the implementation scheme of the present utility model, an insert with an injection hole is used to replace the formation of the injection hole during the injection molding process, avoiding the formation of the injection hole during the injection molding process, making the molding of the needleless medicine tube more stable, ensuring the roundness of the injection hole, and avoiding the generation of flash, thereby improving the yield rate.
[0018] The method and device of the present utility model have other characteristics and advantages, which will be obvious from the accompanying drawings incorporated herein and the subsequent implementation schemes, or will be described in detail in the accompanying drawings incorporated herein and the subsequent implementation schemes. These accompanying drawings and implementation schemes are jointly used to explain the specific principles of the present utility model. Description of the Drawings
[0019] Figure 1 It is a cross-sectional view of the embedded needleless medicine tube according to the implementation scheme of the present utility model;
[0020] Figure 2 is Figure 1 a partial enlarged view at Q in
[0021] Figure 3A It is a three-dimensional structure schematic diagram of the mold for preparing the embedded needleless medicine tube according to the implementation scheme of the present utility model;
[0022] Figure 3B It is a cross-sectional view of the mold for preparing the embedded needleless medicine tube according to the implementation scheme of the present utility model after injection molding;
[0023] Figure 3C is Figure 3B a partial enlarged view at P in
[0024] Figure 3D For Figure 3C Partial enlarged view at M in
[0025] Figure 4A Schematic perspective view of the male mold core of the implementation scheme of the present utility model;
[0026] Figure 4B Schematic perspective view of the slider 130 of the implementation scheme of the present utility model;
[0027] Figure 4C Schematic perspective view of the slider 131 of the implementation scheme of the present utility model;
[0028] Figure 4D Cross-sectional view of the first mold body of the implementation scheme of the present utility model;
[0029] Figure 5A Schematic perspective view of the second mold body of the implementation scheme of the present utility model;
[0030] Figure 5B For Figure 5A Partial enlarged view at N in
[0031] Figure 5C Cross-sectional view of the second mold body of the implementation scheme of the present utility model;
[0032] Figure 6 Schematic view of the gripper of the robotic arm gripping the insert;
[0033] Figure 7 Schematic diagram of the steps of the method for preparing the embedded needleless medicine tube of the implementation scheme of the present utility model.
[0034] Explanation of reference numerals:
[0035] 100: First mold body 101: First cavity
[0036] 110: First mold base 120: Male mold core
[0037] 121: First accommodation space 130: Slider
[0038] 131: Slider 132: First half groove
[0039] 200: Second mold body 201: Second cavity
[0040] 202: Side wall
[0041] 210: Second mold base 220: Female mold core
[0042] 221: Second accommodation space 222: Side wall
[0043] 300: Insert 301: Injection hole
[0044] 400: Mold core 401: Mold core tip
[0045] 500: Chuck
[0046] 600: Medicine tube 601: Medicine tube tip
[0047] 602: Accommodating part 603: Accommodating space
[0048] 604: Injection space.
[0049] It should be understood that the drawings are not necessarily drawn to scale, but rather present a simplified representation of various features to illustrate the basic principles of the present utility model. The specific design features disclosed in the present utility model (including, for example, specific dimensions, directions, positions, and shapes) will be partially determined by the specific application and use environment.
[0050] In these figures, throughout the several views of the drawings, the same reference numerals denote the same or equivalent parts of the present utility model. Detailed implementation manners
[0051] The following will refer in detail to the various implementation manners of the present utility model, examples of which are shown in the drawings and described as follows. Although the present utility model will be described in conjunction with the exemplary implementation manners, it should be understood that this specification is not intended to limit the present utility model to these exemplary implementation manners. On the contrary, the present utility model is intended to cover not only these exemplary implementation manners, but also various alternative forms, modified forms, equivalent forms, and other implementation manners that may be included within the spirit of the present utility model and the scope defined by the appended claims.
[0052] When a component is referred to as being "above" or "over" another component, the component may be in contact with the other component or there may also be an intermediate component.
[0053] The following will be described in conjunction with Figures 1 to 7 the embedded needleless medicine tube according to the implementation manners of the present utility model.
[0054] As Figure 1 and Figure 2 shown, the embedded needleless medicine tube according to the implementation manners of the present utility model includes: an accommodating part 602, an injection part 601, and an insert 300.
[0055] The accommodating part 602 and the injection part 601 are formed as one body to form the medicine tube 600, and the injection part 601 is provided at the front end of the accommodating part 602.
[0056] The insert 300 is disposed at the front end of the injection part 601 and has a through injection hole 301.
[0057] In the embodiment of the present utility model, the insert 300 with the injection hole 301 is used to replace the formation of the injection hole during the injection molding process, avoiding the formation of the injection hole during the injection molding process, making the molding of the needleless medicine tube more stable, ensuring the roundness of the injection hole, and avoiding the generation of flash, thereby improving the yield rate.
[0058] In an exemplary embodiment, the length range of the insert 300 is 1.9 - 2.1 mm.
[0059] In an exemplary embodiment, the outer diameter range of the insert 300 is 0.5 - 0.7 mm.
[0060] In an exemplary embodiment, the inner diameter range of the insert 300 is 0.1 - 0.2 mm.
[0061] The insert 300 can be made of a seamless steel pipe with stable molding, which can ensure the roundness of the injection hole. Specifically, the insert 300 can be made of a stainless steel capillary round tube.
[0062] As Figure 1 and Figure 2 shown, the accommodating part 602 of the medicine tube 600 has an accommodating space 603, the injection part 601 of the medicine tube 600 has an injection space 604, the injection space 604 communicates with the accommodating space 603, and the rear end of the injection hole 301 communicates with the injection space 604, and the front end of the injection hole 301 communicates with the outside.
[0063] In an exemplary embodiment, the taper range of the injection space 604 is 11.9 - 12.1 degrees.
[0064] As Figure 3A 、 Figure 3B 、 Figure 3C and Figure 3D shown, the mold for preparing the embedded needleless medicine tube in the embodiment of the present utility model includes: a first mold body 100, a second mold body 200, an insert 300, and a mold core 400.
[0065] As Figure 3C shown, the first mold body 100 has a first cavity 101, and the second mold body 200 has a second cavity 201.
[0066] As Figure 3C shown, the mold core 400 is installed in the first cavity 101, and the front end of the mold core 400 can extend into the second cavity 201 after the first mold body 100 and the second mold body 200 are closed.
[0067] As Figure 3DAs shown, the insert 300 can be pre-embedded at the front end of the mold core 400 before mold clamping. The insert 300 has an injection hole and can remain in the medicine tube after injection molding.
[0068] In the implementation scheme of the present utility model, by pre-embedding the insert 300 with an injection hole at the front end of the mold core 400 before mold clamping and leaving the insert 300 in the medicine tube after injection molding, the formation of the injection hole during the injection molding process is avoided, making the molding of the needleless medicine tube more stable, ensuring the roundness of the injection hole, and avoiding the generation of flash, thereby improving the yield rate.
[0069] In an exemplary implementation scheme, as Figure 3A and Figure 3B shown, the first mold body 100 includes a first mold base 110 and a male mold core 120. The first mold base 110 is installed on the first machine tool, and the male mold core 120 is installed on the first mold base 110.
[0070] As Figure 4A shown, one side of the male mold core 120 facing the second mold body 200 has a first accommodation space 121. The first accommodation space 121 extends in the horizontal direction (the directions of arrows C and D) and penetrates the second mold body 200. Two symmetrical sliders 130, 131 are arranged in the first accommodation space 121, and the sliders 130, 131 can slide along the first accommodation space 121 (the directions of arrows C and D). As Figure 4B and Figure 4C shown, one side of the two sliders 130, 131 close to each other has a first half groove 132. When the two sliders 130, 131 are closed, the two first half grooves 132 form one end of the first cavity 101. Before injection molding, the staff separates the two sliders 130, 131 from each other (i.e., the slider 130 moves along the direction of arrow C, and the slider 131 moves along the direction of arrow D) to install the mold core 400.
[0071] As Figure 3C shown, the first cavity 101 penetrates the male mold core 120, and the other end of the first cavity 101 extends into the interior of the first mold base 110.
[0072] In an exemplary implementation scheme, as Figures 4A to 4D shown, the male mold core 120 has a first runner 133. One end of the first runner 133 is communicated with the second runner introduced later, and the other end of the first runner 133 is communicated with the first cavity 101. In the Figure 3C implementation scheme, the first runner 133 is located between the two first cavities 101.
[0073] As Figure 4B and Figure 4CAs shown, the sides of the two sliders 130 and 131 that are close to each other have second half grooves 134. When the two sliders 130 and 131 are closed, the two second half grooves 134 form a first flow channel 133, that is, the first flow channel 133 penetrates through the closed sliders 130 and 131.
[0074] In an exemplary embodiment, as Figure 3A and Figure 5A shown, the second mold body 200 includes a second mold base 210 and a female mold core 220. The second mold base 210 is installed on a second machine tool, and the female mold core 220 is installed on the second mold base 210. Among them, the first machine tool and the second machine tool are independent machine tools. As Figure 5A and Figure 5C shown, the side of the female mold core 220 facing the first mold body 100 has a second accommodation space 221 corresponding to the sliders 130 and 131. As Figure 5B and Figure 5C shown, the side wall 222 of the second accommodation space 221 away from the male mold core 120 has an inwardly recessed second cavity 201. After the molds are closed, a part of the sliders 130 and 131 can be accommodated in the second accommodation space 221.
[0075] The second mold body 200 has a second flow channel (not shown in detail in the figure). The second flow channel penetrates through the second mold body 200. After the molds are closed, a medical-grade PC material can be injected into the second flow channel on the side of the second mold body 200 away from the first mold body 100 to complete the injection molding.
[0076] The staff uses the chuck 500 of the robotic arm to hold the insert 300 and sends the insert 300 into the mold core 400. The material of the chuck 500 can be selected as a copper rod.
[0077] In an exemplary embodiment, as Figure 3C shown, the front end of the mold core 400 has a mold core tip 401. The mold core tip 401 is conical, and the mold core tip 401 can extend into the second cavity 201 after the first mold body 100 and the second mold body 200 are closed.
[0078] In the shown embodiment, the number of mold cores 400 is set to 2, but the number can be adjusted according to the situation. For example, it can be set to any number from 1 to 5.
[0079] Among them, the outer diameter of the part of the mold core 400 located within the first mold base 110 and the male mold core 120 is adapted to the diameter of the first cavity 101, the outer diameter of the part of the mold core 400 located within the two sliders is smaller than the diameter of the first cavity 101, and the outer diameter of the part of the mold core 400 located within the second cavity 201 is smaller than the diameter of the second cavity 201, so as to form a medicine tube 600 within the parts of the first cavity 101 located within the sliders 130, 131 and within the second cavity 201.
[0080] The operation of the mold for preparing the embedded needleless medicine tube according to the embodiment of the present utility model will be described below in conjunction with the accompanying drawings.
[0081] As Figure 7 shown, the method for preparing the embedded needleless medicine tube includes:
[0082] Step S110, before injection molding, place the mold core 400 into the first cavity 101 of the first mold body 100.
[0083] Specifically, step S110 includes the following steps:
[0084] Step S111, split the mold. Specifically, move the first mold body 100 along the first direction (A direction) so that the first mold body 100 and the second mold body 200 are separated.
[0085] Step S112, separate the two sliders 130, 131. Specifically, move the slider 130 along the second direction (the direction of arrow C), and move the slider 131 along the third direction (the direction of arrow D) so that the slider 130 and the slider 131 are separated.
[0086] Step S113, use a robotic arm to place the mold core 400 into the first mold base 110 and the male mold core 120 of the first mold body 100 (i.e., only a part of the first cavity 101).
[0087] Step S114, close the two sliders 130, 131. Specifically, move the slider 130 along the third direction (the direction of arrow D), and move the slider 131 along the second direction (the direction of arrow C) so that the slider 130 and the slider 131 are closed, and further the first half grooves 132 of the sliders 130, 131 enclose one end of the first cavity 101 and surround the mold core 400 in the circumferential direction.
[0088] Step S120, use the chuck 500 of the robotic arm to clamp the insert 300 (see in conjunction with Figure 6 ), and send the insert 300 to the front end of the mold core 400.
[0089] Step S130: Close the first mold body 100 and the second mold body 200. Specifically, move the first mold body 100 along the fourth direction (direction B) so that the first mold body 100 and the second mold body 200 are closed. Among them, as Figure 3D shown, after closing the mold, the side wall 202 of the second cavity 201 away from the first mold body 100 contacts the end face of the insert 300, so that the end face of the formed medicine tube 600 is flush with the end face of the insert 300.
[0090] Step S140: Inject medical-grade PC material into the second runner on the side of the second mold body 200 away from the first mold body 100. The medical-grade PC material is sequentially injected into the first cavity 101 and the second cavity 201 through the second runner and the first runner 133. Among them, the medical-grade PC material is injected into the second cavity 201 through the first cavity 101.
[0091] Step S150: Wait for the medical-grade PC material to cool, and then demold.
[0092] Specifically, step S150 includes the following steps:
[0093] Step S151: After the medical-grade PC material cools, move the first mold body 100 along the first direction (direction A) so that the first mold body 100 and the second mold body 200 are separated, that is, the mold is opened.
[0094] Step S152: Move the slider 130 along the second direction (the direction of arrow C), and move the slider 131 along the third direction (the direction of arrow D) so that the slider 130 and the slider 131 are separated.
[0095] Step S153: Remove the formed medicine tube 600 from the mold core 400. Among them, since the medical-grade PC material is welded to the insert 300, the insert 300 remains in the medicine tube tip 601 of the medicine tube 600. The embedded needleless medicine tube obtained after demolding is as Figure 1 and Figure 2 shown. The insert 300 has an injection hole 301, and the liquid medicine in the medicine tube 600 can be injected out through the injection hole 301 of the insert 300.
[0096] For the convenience of explanation and precise definition of the appended claims, the terms "upper", "lower", "inner", "outer", "above", "below", "upper", "lower", "upward", "downward", "front", "rear", "behind", "inner side", "outer side", "inward", "outward", "inside", "outside", "internal", "external", "forward", "backward" are used to describe the features of the exemplary specific embodiments with reference to the positions of these features shown in the drawings.
[0097] The foregoing description of the specific exemplary embodiments of the present utility model has been presented for purposes of illustration and description. The foregoing description is not intended to be exhaustive nor to limit the present utility model to the precise forms disclosed, and obviously, many modifications and variations are possible in light of the above teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the present utility model and its practical application so that others skilled in the art may realize and utilize the various exemplary embodiments of the present utility model and its various alternative forms and modifications. The scope of the present utility model is defined by the appended claims and their equivalents.
Claims
1. A pre-buried needle-free drug tube, characterized in that: include: a receiving portion; An injection portion, which is disposed at a front end of the receiving portion; as well as The insert is arranged at the front end of the injection part and has a penetrating injection hole.
2. The pre-buried needle-free drug tube according to claim 1, characterized in that: The length of the insert is in the range of 1.9 to 2.1 mm.
3. The pre-buried needle-free drug tube according to claim 1, characterized in that: The outer diameter of the insert is in the range of 0.5 to 0.7 mm.
4. The pre-buried needle-free drug tube according to claim 1, characterized in that: The inner diameter of the insert is in the range of 0.1 to 0.2 mm.
5. The pre-buried needle-free drug tube according to claim 1, characterized in that: The accommodating portion has an accommodating space, the injection portion has an injection space, the injection space is connected to the accommodating space, the rear end of the injection hole is connected to the injection space, and the front end of the injection hole is connected to the outside.
6. The pre-buried needle-free drug tube according to claim 5, characterized in that: The taper range of the injection space is 11.9 to 12.1 degrees.
7. The pre-buried needle-free drug tube according to claim 1, characterized in that: The pre-buried needle-free medicine tube is prepared by a mold, and the mold includes: A first mold body having a first cavity; A second mold body having a second cavity; a mold core, which is mounted to the first mold cavity, and the front end of the mold core can extend into the second mold cavity after the first mold body and the second mold body are molded together; and The insert can be pre-buried in the front end of the mold core before mold closing. The insert has an injection hole and can remain in the medicine tube after injection molding.
8. The pre-buried needle-free drug tube according to claim 7, characterized in that: The front end of the mold core has a mold core tip, and the mold core tip can extend into the second mold cavity after the first mold body and the second mold body are molded together.
9. The pre-buried needle-free drug tube according to claim 7, characterized in that: The first mold body comprises a first mold frame and a male mold core, the first mold frame is installed on a first machine tool, and the male mold core is installed on the first mold frame.
10. The pre-buried needle-free drug tube according to claim 9, characterized in that: The side of the male mold core facing the second mold body is provided with a first accommodating space, and two symmetrical sliding blocks are arranged in the first accommodating space, and the two sliding blocks can slide along the first accommodating space.