Injection molding mold for medical infusion puncture device

Abstract

A medical infusion puncture device injection molding mold, including cavity module and core module, core module is provided with upper core insert, lower core insert and core frame, cavity module is provided with upper cavity insert and lower cavity insert, puncture device contour cavity is arranged between lower cavity insert and upper core insert, outer slide block is arranged on both sides of core frame, inner side end of outer slide block is connected with filter air hole interface core, front end of filter air hole interface core extends into puncture device contour cavity, infusion hole core is arranged below upper cavity insert, filter air hole core is arranged on lower core insert, infusion hole core and filter air hole core respectively extend into puncture device contour cavity, infusion hole core extends into upper core insert through cavity, filter air hole interface core, infusion hole core and filter air hole core make puncture device contour cavity constitute puncture device mold cavity for forming puncture device.

Description

Technical Field

[0001] This utility model belongs to the field of injection mold technology, specifically relating to an injection molding mold for a medical infusion puncture device. Background Technology

[0002] An infusion puncture device is a sharp instrument used to puncture the rubber stopper of an infusion bottle. Its internal infusion port communicates with the infusion bottle, and its external end connects to the infusion tubing. Puncture devices are typically injection-molded from plastic. Conventional puncture devices have a simple structure, usually consisting of a hollow tube with a sharp bevel at one end and a connector for the infusion tubing at the other. The injection mold used to manufacture these puncture devices is also relatively simple. However, in actual use, external contaminants can sometimes adhere to the puncture device and be inserted into the rubber stopper along with it, contaminating the medication. To address this issue, the applicant has designed a puncture device with an air filter. Simultaneously, an injection mold for manufacturing this air-filtered puncture device has also been designed. Summary of the Invention

[0003] The purpose of this invention is to provide an injection molding mold for producing medical infusion puncture devices with air filtration devices. It adopts an upper and lower interlocking design, double-row double-sided core pulling, and multiple cavities in one mold, resulting in high production efficiency.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A medical infusion trocar injection molding die includes a cavity module and a core module. The core module contains a core insert, which consists of an upper core insert and a lower core insert. A core frame surrounds the upper and lower core inserts. The cavity module also contains a cavity insert, which consists of an upper cavity insert and a lower cavity insert. The lower cavity insert mates with the upper core insert. A double row of trocar contour cavities is provided between the lower and upper cavity inserts, with at least two cavities in each row. External sliders are provided on both sides of the core frame. Driven by a power source, the outer slide block has an inner end connected to a filter air port interface core. The front end of the filter air port interface core extends into the puncture device contour cavity. An infusion port core is provided below the upper cavity insert, and a filter air port core is provided on the lower core insert. The infusion port core and the filter air port core extend into the puncture device contour cavity in a staggered manner, with the front end of the filter air port core colliding with the front end of the filter air port interface core. The infusion port core passes through the cavity and extends into the upper core insert. The filter air port interface core, the infusion port core, and the filter air port core together form the puncture device mold cavity within the puncture device contour cavity. The puncture device mold cavity is used to form the puncture device.

[0005] Furthermore, the lower core insert is provided with a beveled pad, and the upper core insert is provided with two corresponding beveled inserts. The two beveled inserts are fixed on the beveled pad. The infusion hole core extends into one of the beveled inserts, and the filter air hole core passes through the other beveled insert.

[0006] Furthermore, an external hydraulic cylinder is provided on each of the two outer walls of the core frame. The cylinder rod of the external hydraulic cylinder is connected to the external slider. A connecting block is located on the inner side wall of the external slider, and the filter air port interface core is connected to the connecting block.

[0007] Furthermore, a cavity cover plate is provided on the cavity module, and a gate is provided on the cavity cover plate. The gate is connected to the piercing mold cavity through a runner.

[0008] Furthermore, the core module is provided with two mold feet, and a core cover plate is provided under the two mold feet. An upper ejector plate and a lower ejector plate are provided between the two mold feet. An ejector pin and an ejector rod are connected on the upper ejector plate. The ejector pin passes through the core module and the core insert and contacts the piercing device. The ejector rod passes through the core module and the core insert and cooperates with the flow channel.

[0009] This utility model discloses an injection molding die for a medical infusion puncture device, the beneficial effects of which are: By setting two rows of piercing device contour cavities between the lower cavity insert and the upper core insert, with at least two cavities in each row, and inserting a filter vent interface core, a fluid inlet core, and a filter vent core into each cavity, a piercing device mold cavity is formed. During injection molding, molten plastic raw material enters the piercing device mold cavity through the gate and runner, filling it and undergoing pressure holding, shaping, and cooling. This results in a piercing device with an air filtration device. The multi-cavity, double-row design enables multi-cavity processing in a single mold (producing multiple products in one injection molding), resulting in high production efficiency. Furthermore, the filter vent interface core, fluid inlet core, and filter vent core employ an interlocking structure, simplifying the structure and facilitating core removal and demolding. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the injection molding mold structure for the medical infusion puncture device of this utility model; Figure 2 yes Figure 1 Enlarged view of a portion at point A; Figure 3 This is a schematic cross-sectional view of the injection molding die for the medical infusion puncture device of this utility model; Figure 4 This is a three-dimensional schematic diagram of the injection molding mold for the medical infusion puncture device of this utility model. Detailed Implementation

[0011] The present invention will be described in detail below with reference to specific implementation examples. The following implementation examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way.

[0012] like Figure 1 — Figure 4 As shown, this utility model relates to an injection molding mold for a medical infusion puncture device, including a cavity module 1 and a core module 2. The core module 2 contains a core insert, which consists of an upper core insert 3 and a lower core insert 5. A core frame 4 is fitted over the upper and lower core inserts 3 and 5. The cavity module 1 contains a cavity insert, which consists of an upper cavity insert 6 and a lower cavity insert 7. The lower cavity insert 7 corresponds to and engages with the upper core insert 3. A double row of puncture device contour cavities is provided between the lower cavity insert 7 and the upper core insert 3, with at least two puncture device contour cavities in each row. An outer slider 9 is provided on each side of the core frame 4. The outer slider 9 is driven by a movable... Force drives the outer slide, and the inner end of the outer slide is connected to the filter air port interface core 10. The front end of the filter air port interface core 10 extends into the puncture device contour cavity. The upper cavity insert 6 is provided with an infusion hole core 11, and the lower core insert 5 is provided with a filter air port core 12. The infusion hole core 11 and the filter air port core 12 extend into the puncture device contour cavity in a staggered manner, and the front end of the filter air port core 12 collides with the front end of the filter air port interface core 10. The infusion hole core 11 passes through the cavity and extends into the upper core insert 3. The filter air port interface core 10, the infusion hole core 11, and the filter air port core 12 make the puncture device contour cavity form the puncture device mold cavity 8, which is used to form the puncture device 81. The cavity module 1 is provided with a cavity cover plate 20, and the cavity cover plate 20 is provided with a gate 21. The gate 21 is connected to the puncture device mold cavity 8 through a runner 28. The core module 2 is provided with two mold feet 22, and a core cover plate 23 is provided under the two mold feet. An upper ejector plate 24 and a lower ejector plate 25 are provided between the two mold feet. An ejector pin 26 and an ejector rod 27 are connected on the upper ejector plate 24. The ejector pin 6 passes through the core module 2 and the core insert and contacts the piercing device 81. The ejector rod 27 passes through the core module 2 and the core insert and cooperates with the flow channel 28.

[0013] During injection molding, molten plastic raw material enters the puncture device cavity 8 through the gate 21 and runner 28, filling the cavity. Through processes such as pressure holding, shaping, and cooling, a puncture device 81 with an air filter is formed within the cavity 8. Then, the mold opens, and the core module 2, along with the core frame 4, separates from the cavity module 1. The puncture device 81 moves with the core module 2, causing the infusion port core 11 to be extracted from the puncture device 81. After the infusion port core 11 is extracted, the mold continues to open, and so on. During the process, the power source drives the outer slider 9, which in turn pulls the filter air hole interface core 10 out of the piercing device 81. Simultaneously, the power source (usually the push rod of the injection molding machine) pushes the lower ejector plate 25 in the opposite direction. The lower ejector plate 25 drives the ejector pins 26 on the upper ejector plate 24 to lift the piercing device 8, causing the filter air hole core 12 to be pulled out of the piercing device 8. The upward push continues, and together with the ejector rod 27, the piercing device 81 and the remaining material in the runner are ejected out of the mold, completing the piercing device machining. In actual machining, the piercing device mold cavity 8 has multiple double-row designs, allowing for the production of at least four products at a time, resulting in high production efficiency.

[0014] Furthermore, the lower core insert 5 is provided with a beveled pad 15, and the upper core insert 3 is provided with two corresponding beveled inserts 16. The two beveled inserts 16 are fixed on the beveled pad 15. The infusion port core 11 extends into one of the beveled inserts 16, and the filter air port core 12 passes through the other beveled insert 16. The beveled part of the puncture device adopts a structure of two corresponding beveled inserts 16, which facilitates the processing of corresponding features in the beveled inserts 16 and reduces the processing difficulty.

[0015] Furthermore, an external hydraulic cylinder 17 is provided on each of the two outer walls of the core frame 4. The cylinder rod of the external hydraulic cylinder 17 is connected to the external slider 9. A connecting block 18 is provided on the inner side wall of the external slider 9. The filter air hole interface core 10 is connected to the connecting block 18. With the connecting block 18, it is easy to connect the filter air hole interface core 10 to the external slider 9. The external hydraulic cylinder 17 drives the filter air hole interface core 10 to slide outward through the connecting block 18.

[0016] The above specific embodiments are used to explain and illustrate the present utility model, and are not intended to limit the present utility model. Any modifications and changes made to the present utility model within the spirit and scope of the claims shall fall within the protection scope of the present utility model.

Claims

1. A medical infusion puncture device injection mold, characterized in that: The system includes a cavity module (1) and a core module (2) with corresponding configurations. The core module (2) contains a core insert, which consists of an upper core insert (3) and a lower core insert (5). The upper core insert (3) and the lower core insert (5) are fitted with a core frame (4). The cavity module (1) contains a cavity insert, which consists of an upper cavity insert (6) and a lower cavity insert (7). The lower cavity insert (7) corresponds to and cooperates with the upper core insert (3). A double row of puncture device contour cavities is provided between the lower cavity insert (7) and the upper core insert (3). Each row of puncture device contour cavities has at least two cavities. An outer slider (9) is provided on each side of the core frame (4). The outer slider (9) is driven to slide outward by a power source. The inner end of the outer slider... The filter vent core (10) is connected to the filter vent core (10). The front end of the filter vent core (10) extends into the puncture device contour cavity. The upper cavity insert (6) is provided with an infusion port core (11), and the lower core insert (5) is provided with a filter vent core (12). The infusion port core (11) and the filter vent core (12) extend into the puncture device contour cavity in a staggered manner, and the front end of the filter vent core (12) collides with the front end of the filter vent core (10). The infusion port core (11) passes through the cavity and extends into the upper core insert (3). The filter vent core (10), the infusion port core (11), and the filter vent core (12) make the puncture device contour cavity form the puncture device mold cavity (8). The puncture device mold cavity (8) is used to form the puncture device (81).

2. The injection molding die for a medical infusion puncture device as described in claim 1, characterized in that... The lower core insert (5) is provided with a beveled pad (15), and the upper core insert (3) is provided with two corresponding beveled inserts (16). The two beveled inserts (16) are fixed on the beveled pad (15). The infusion hole core (11) extends into one of the beveled inserts (16), and the filter air hole core (12) passes through the other beveled insert (16).

3. The injection molding die for a medical infusion puncture device as described in claim 1, characterized in that... The outer walls of the core frame (4) are each provided with an outer hydraulic cylinder (17). The cylinder rod of the outer hydraulic cylinder (17) is connected to the outer slider (9). The inner wall of the outer slider (9) is connected to a connecting block (18). The filter air hole interface core (10) is connected to the connecting block (18).

4. The injection molding die for a medical infusion puncture device as described in claim 1, characterized in that... The cavity module (1) is provided with a cavity cover plate (20), and the cavity cover plate (20) is provided with a gate (21). The gate (21) is connected to the puncture mold cavity (8) through the runner (28).

5. The injection molding die for a medical infusion puncture device as described in claim 1, characterized in that... Two mold feet (22) are provided under the core module (2), and a core cover plate (23) is provided under the two mold feet. An upper ejector plate (24) and a lower ejector plate (25) are provided between the two mold feet. An ejector pin (26) and an ejector rod (27) are connected on the upper ejector plate (24). The ejector pin (26) passes through the core module (2) and the core insert and contacts the piercing device (81). The ejector rod (27) passes through the core module (2) and the core insert and cooperates with the flow channel (28).

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