Adjustable positioning and clamping mechanism for injection molding and embedding of puncture inner needle
By designing an adjustable positioning and clamping mechanism, the problem of needle tip deviation during injection molding was solved, enabling precise positioning of puncture needles of different specifications, thus improving processing quality and applicability.
Patent Information
- Application Number
- CN202520593142.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-01
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-04-01
AI Technical Summary
In the prior art, the puncture needle is prone to deflection during injection molding, and the length of puncture needles of different specifications is different, resulting in low processing quality and a lack of a well-adaptable positioning and clamping mechanism.
An adjustable positioning and clamping mechanism is designed, including an adjustable first adjustment seat and an adjustable second adjustment seat. Through the cooperation of screw and spring, it can achieve precise positioning and clamping of puncture needles of different lengths. The guide groove and T-shaped slide groove are used to prevent sliding displacement, and the needle tip alignment bevel and relief groove are equipped to avoid needle tip deformation.
It improves the production quality of puncture needles, adapts to puncture needles of different specifications, expands the scope of application, and ensures processing accuracy and quality.
Smart Images
Figure CN223934018U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of injection molding equipment for medical supplies, specifically to a positioning and clamping mechanism for injection molding and embedding adjustable puncture needles. Background Technology
[0002] A puncture needle is a commonly used medical device that can be used to puncture organs or tissues or to inject drugs. During the manufacturing process, a needle hub needs to be injection molded at the end of the steel needle. Before injection molding, the puncture needle needs to be embedded in the lower mold core.
[0003] Because the puncture needle is relatively long, only part of it is inside the mold during processing. Existing puncture needles only use positioning within the mold. After the needle head is processed, there will still be a misalignment between the needle head and the needle seat, resulting in low processing quality. In addition, puncture needles come in various specifications, and the length of puncture needles of different specifications is different. Therefore, an adjustable positioning and clamping mechanism for injection molding and embedding of puncture needles is needed. Utility Model Content
[0004] The purpose of this utility model is to provide an adjustable positioning and clamping mechanism for injection molding of puncture needles, which is equipped with an adjustable first adjustment seat and a second adjustment seat, can adapt to the positioning and clamping of puncture needles of different lengths, improve the production quality of puncture needles, and has a wide range of applications.
[0005] To achieve the above objectives, this utility model provides the following technical solution: an adjustable positioning and clamping mechanism for injection molding of puncture needles, comprising a lower mold core and an outer base plate. An in-mold positioning seat is fixedly connected inside the lower mold core. A support seat is fixedly connected to one side of the outer base plate. Multiple connecting holes are opened on the other side of the outer base plate. A first adjusting seat is detachably connected to the connecting holes. A sliding groove is opened on the upper part of the first adjusting seat. A second adjusting seat is slidably connected to the sliding groove. Quick clamps are fixedly connected to both sides of the second adjusting seat on the first adjusting seat. A spring is provided between the second adjusting seat and the first adjusting seat. A screw is threadedly connected to the side of the first adjusting seat. A first positioning groove is provided at both ends of the second adjusting seat. A second positioning groove is opened on the in-mold positioning seat and the support seat.
[0006] Furthermore, the plurality of connecting holes are arranged in a linear array on the outer base plate, and the first adjusting seat is fixedly connected to the outer base plate by screws.
[0007] Furthermore, the outer seat plate is provided with a guide groove, and the first adjusting seat is slidably connected to the guide groove.
[0008] Furthermore, both the slide and the second adjusting seat have a T-shaped cross-section.
[0009] Furthermore, a limiting hole is provided on the second adjusting seat, one end of the spring is located in the limiting hole, and one end of the screw abuts against the second adjusting seat.
[0010] Furthermore, the end of the first positioning groove is provided with a needle tip alignment bevel and a needle tip clearance groove.
[0011] The beneficial effects of this utility model are as follows: It is equipped with an adjustable first adjustment seat and a second adjustment seat, which can adapt to the positioning and clamping of puncture needles of different lengths, improve the production quality of puncture needles, and has a wide range of applications. Attached Figure Description
[0012] Figure 1 This is a first-view schematic diagram of the present invention.
[0013] Figure 2 This is a second-view schematic diagram of the present invention.
[0014] Figure 3 This is a schematic diagram of the first adjusting seat of this utility model.
[0015] Figure 4 This is a schematic diagram of the positioning groove of this utility model.
[0016] In the diagram: 1. Lower mold core; 101. In-mold positioning seat; 2. Outer seat plate; 201. Connecting hole; 3. First adjusting seat; 301. Slide groove; 4. Second adjusting seat; 401. First positioning groove; 4011. Needle tip alignment slope; 4012. Needle tip clearance groove; 5. Quick clamp; 6. Spring; 7. Screw; 8. Support seat. Detailed Implementation
[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.
[0018] refer to Figures 1-4The adjustable positioning and clamping mechanism for injection molding of puncture needles includes a lower mold core 1 and an outer base plate 2. An in-mold positioning seat 101 is fixedly connected inside the lower mold core 1. A support seat 8 is fixedly connected to one side of the outer base plate 2. Multiple connecting holes 201 are opened on the other side of the outer base plate 2. A first adjusting seat 3 is detachably connected to the connecting holes 201. A sliding groove 301 is opened on the first adjusting seat 3. A second adjusting seat 4 is slidably connected to the sliding groove 301. Quick clamps 5 are fixedly connected to both sides of the second adjusting seat 4 on the first adjusting seat 3. A spring 6 is provided between the second adjusting seat 4 and the first adjusting seat 3. A screw 7 is threadedly connected to the side of the first adjusting seat 3. A first positioning groove 401 is provided at both ends of the second adjusting seat 4. The in-mold positioning seat 101 and the support seat 8 are provided with second positioning grooves.
[0019] Multiple connecting holes 201 are arranged in a linear array on the outer seat plate 2. When the length of the puncture needle to be processed changes significantly and needs to be adjusted, the corresponding connecting hole 201 is selected and fixed by sliding the first adjusting seat 3. The first adjusting seat 3 is fixedly connected to the outer seat plate 2 by screws.
[0020] The outer seat plate 2 is provided with a guide groove, and the first adjusting seat 3 is slidably connected to the guide groove. The guide groove is used to guide the sliding of the first adjusting seat 3.
[0021] The cross-sections of the slide groove 301 and the second adjusting seat 4 are both T-shaped to prevent longitudinal displacement when the second adjusting seat 4 slides.
[0022] The second adjusting seat 4 has a limiting hole, and one end of the spring 6 is located in the limiting hole. The limiting hole can limit the extension and retraction of the spring. One end of the screw 7 abuts against the second adjusting seat 4. Rotating the screw 7 can adjust the position of the second adjusting seat 4.
[0023] The end of the first positioning groove 401 is provided with a needle tip alignment slope 4011 and a needle tip clearance groove 4012. The needle tip alignment slope 4011 can match the needle tip slope of the puncture needle for alignment, and the needle tip clearance groove 4012 can prevent needle tip deformation during alignment and positioning.
[0024] The working principle of this utility model is as follows: First, based on the length of the puncture needle, a suitable connecting hole 201 is selected and fixedly installed by sliding the first adjusting seat 3 for coarse adjustment. Then, the position of the second adjusting seat 4 is further adjusted by rotating the screw 7 for fine adjustment. In use, the puncture needle is placed along the second positioning groove on the mold positioning seat 101 and the support seat 8, and the first positioning groove 401 on the second adjusting seat 4, so that the tip of the puncture needle matches and aligns with the tip alignment slope 4011. Then, the puncture needle is pressed tightly using the quick clamp 5, and then injection molding is performed.
[0025] The above embodiments are used to further illustrate the present invention, but do not limit the present invention to these specific embodiments. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be understood as being within the protection scope of the present invention.
Claims
1. A positioning and clamping mechanism for injection molding and embedding adjustable puncture needles, characterized in that: The device includes a lower mold core (1) and an outer base plate (2). An in-mold positioning seat (101) is fixedly connected inside the lower mold core (1). A support seat (8) is fixedly connected to one side of the outer base plate (2). Multiple connecting holes (201) are opened on the other side of the outer base plate (2). A first adjusting seat (3) is detachably connected to the connecting hole (201). A sliding groove (301) is opened on the first adjusting seat (3). A second adjusting seat (4) is slidably connected to the sliding groove (301). Quick clamps (5) are fixedly connected to both sides of the second adjusting seat (4) on the first adjusting seat (3). A spring (6) is provided between the second adjusting seat (4) and the first adjusting seat (3). A screw (7) is threadedly connected to the side of the first adjusting seat (3). A first positioning groove (401) is provided at both ends of the second adjusting seat (4). A second positioning groove is opened on the in-mold positioning seat (101) and the support seat (8).
2. The adjustable positioning and clamping mechanism for injection molding of an internal puncture needle according to claim 1, characterized in that: The multiple connecting holes (201) are arranged in a linear array on the outer seat plate (2), and the first adjusting seat (3) is fixedly connected to the outer seat plate (2) by screws.
3. The adjustable positioning and clamping mechanism for injection molding of an internal puncture needle according to claim 1, characterized in that: The outer seat plate (2) is provided with a guide groove, and the first adjusting seat (3) is slidably connected to the guide groove.
4. The positioning and clamping mechanism for injection molding of an adjustable puncture needle according to claim 3, characterized in that: The cross-sections of the slide (301) and the second adjusting seat (4) are both T-shaped.
5. The positioning and clamping mechanism for injection molding of an adjustable puncture needle according to claim 1, characterized in that: The second adjusting seat (4) has a limiting hole, one end of the spring (6) is located in the limiting hole, and one end of the screw (7) abuts against the second adjusting seat (4).
6. The positioning and clamping mechanism for injection molding of an adjustable puncture needle according to claim 1, characterized in that: The end of the first positioning groove (401) is provided with a needle tip alignment slope (4011) and a needle tip clearance groove (4012).