Injection mold for balloon catheter production

Abstract

The utility model discloses a kind of injection mould for balloon guide tube production, belong to injection mould technical field.The utility model includes base and fixed plate, the top of base is equipped with lower mould seat, the top of lower mould seat is provided with upper mould seat, and the center of upper mould seat is provided with reserved slot, and disc is installed in reserved slot, and the center of disc is provided with flow guide hole, and the bottom of disc is vertically installed with material guide pipe, and the top of material guide pipe is connected with the bottom of flow guide hole.The utility model is provided with circular groove, sealing washer and groove, sealing washer is compressed when being connected by external material supply guide pipe, static seal is formed, high-pressure plastic is prevented from leaking from connecting portion, groove makes that the molten plastic of high-speed inflow can be smoothly merged into flow guide hole, turbulence and vortex phenomenon are effectively reduced, laying foundation for subsequent filling mould cavity by material guide pipe, thereby the stability of injection molding process and the forming quality of final balloon guide tube product are improved.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to an injection mold for the production of balloon guide tubes. Background Technology

[0002] In the manufacturing process of balloon guide tubes, injection molding is one of the key technological steps, and the performance of the mold directly affects the product quality and production efficiency. In existing technologies, injection molds used for balloon guide tube production typically include an upper mold base, a lower mold base, and a feeding system located within the upper mold base. This feeding system generally has a disc-shaped structure for connecting to external molten plastic conveying equipment (such as an injection molding machine nozzle or feed conduit), with a guide hole at the center of the disc to guide the molten plastic into the mold cavity. In actual production, ensuring the stable and leak-free delivery of molten plastic to the mold cavity under high pressure is fundamental to guaranteeing molding quality.

[0003] In existing mold structures, the sealing performance and material flow guidance smoothness of the interface between the feed disc and the external conveying components, as well as the transition area from the guide orifice to the downstream flow channel, still have room for improvement. Insufficient sealing at the interface may lead to plastic leakage, resulting in material waste and potentially affecting the cleanliness and safety of the production environment. Furthermore, an abrupt transition at the guide orifice outlet may cause unnecessary turbulence or stagnation in the material flow, potentially impacting the uniformity of the final product. Therefore, optimizing the injection mold's feeding system to further improve its sealing reliability and material flow smoothness is of great significance for producing high-performance balloon guide tube products. Utility Model Content

[0004] The purpose of this invention is to provide an injection mold for the production of balloon guide tubes, which solves the problem of easy leakage at the feed interface by setting a circular groove, sealing ring and groove.

[0005] This utility model is achieved through the following technical solution:

[0006] This utility model relates to an injection mold for producing balloon guide tubes, comprising a base and a fixing plate. A lower mold base is installed on the top of the base, and an upper mold base is installed on the top of the lower mold base. A reserved groove is opened at the center of the upper mold base, and a disc is installed in the reserved groove. A guide hole is opened at the center of the disc, and a guide tube is vertically installed at the bottom of the disc. The top end of the guide tube is connected to the bottom end of the guide hole. A circular groove is opened at the top of the disc, and a sealing ring is installed in the circular groove. A recess is opened at the center of the top of the disc, and the recess communicates with the guide hole.

[0007] Furthermore, mounting slots are provided on both sides of the disc.

[0008] Furthermore, positioning rods are vertically installed at the four corners of the lower mold base, and each positioning rod has a chamfer.

[0009] Furthermore, sleeves are vertically installed at the four corners of the bottom of the lower mold base, and each sleeve has a positioning groove that matches the corresponding positioning rod.

[0010] Furthermore, both ends of the fixing plate are provided with through holes, and each through hole is horizontally fitted with a bolt. The lower mold base and the upper mold base are respectively provided with a first threaded hole and a second threaded hole on one side, and two bolts are respectively threaded into the first threaded hole and the second threaded hole.

[0011] Furthermore, the lower mold base has a lower mold core at its top and an upper mold core at its bottom, with the lower mold core and the upper mold core containing the balloon guide tube body.

[0012] This utility model has the following beneficial effects:

[0013] This invention features a circular groove, a sealing ring, and a recess. The sealing ring is compressed when the external material supply conduit is connected, forming a static seal to prevent high-pressure plastic from leaking from the connection point. The recess allows the high-speed flowing molten plastic to smoothly flow into the guide hole, effectively reducing turbulence and eddy currents. This lays the foundation for subsequent filling of the mold cavity through the guide tube, thereby improving the stability of the injection molding process and the final molding quality of the balloon guide tube product.

[0014] This utility model, through the arrangement of positioning rods and sleeves, as well as fixing plates and bolts, with the positioning rods and positioning grooves cooperating with each other, ensures that the upper and lower mold bases can be guided and positioned during the mold closing process, avoiding misalignment. By tightening the bolts at both ends of the fixing plate, it is secured to the first and second threaded holes on the sides of the lower and upper mold bases respectively, thereby laterally locking the lower and upper mold bases, enhancing the overall rigidity and closing stability of the mold, and preventing the mold bases from expanding open.

[0015] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the lower mold base.

[0017] Figure 2 This is a schematic diagram of the upper mold base;

[0018] Figure 3 This is a schematic diagram of the structure of the upper mold base and the disc;

[0019] Figure 4 This is a schematic diagram of the structure of the disc and the sealing ring.

[0020] In the diagram: 1. Base; 2. Lower mold base; 201. Lower mold core; 202. First threaded hole; 3. Upper mold base; 301. Reserved groove; 302. Upper mold core; 303. Second threaded hole; 4. Disc; 401. Groove; 402. Guide hole; 403. Circular groove; 404. Mounting groove; 5. Guide tube; 6. Sealing ring; 7. Sleeve; 701. Positioning groove; 8. Positioning rod; 801. Chamfer; 9. Fixing plate; 10. Bolt; 11. Balloon guide tube body. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-4 This utility model provides a technical solution: an injection mold for producing balloon guide tubes, including a base 1 and a fixing plate 9. A lower mold base 2 is installed on the top of the base 1, and an upper mold base 3 is provided on the top of the lower mold base 2. The top of the lower mold base 2 has a lower mold core 201, and the bottom of the upper mold base 3 has an upper mold core 302. The lower mold core 201 and the upper mold core 302 contain a balloon guide tube body 11. When the mold is closed, the lower mold core 201 and the upper mold core 302 together form a cavity that is consistent with the shape of the product. The cavity is used to form the balloon guide tube body 11.

[0023] A pre-reserved groove 301 is provided at the center of the upper mold base 3, and a disc 4 is installed in the pre-reserved groove 301. Mounting grooves 404 are provided on both sides of the disc 4, through which external conveying conduits are connected. A guide hole 402 is provided at the center of the disc 4. A guide pipe 5 is vertically installed at the bottom of the disc 4, guiding the molten plastic to the entrance of the mold cavity. The top end of the guide pipe 5 is connected to the bottom end of the guide hole 402. A circular groove 403 is provided at the top of the disc 4, and a sealing ring 6 is installed in the circular groove 403. The sealing ring 6 is made of silicone rubber. When the external feeding conduit is aligned with the top of the disc 4, the sealing ring 6 is compressed, thus forming a static seal between them, effectively preventing leakage of high-pressure molten plastic. A groove 401 is provided at the center, which is connected to the guide hole 402. After the mold is closed, the injection molding machine is started. The molten plastic is pushed by the screw of the injection molding machine and transported to the feeding system of the mold through the external feeding conduit. The end of the feeding conduit is tightly fitted with the top of the disc 4 and compresses the sealing ring 6 located in the groove 403 to form a high-pressure seal, ensuring that the molten plastic will not leak from this connection. The molten plastic first flows into the groove 401 at the top of the disc 4. The groove 401 acts as a buffer and distribution area, allowing the material flow to converge into the guide hole 402 in the center. Then the plastic flows vertically downward along the guide hole 402 and is precisely guided to the gate position of the ball guide tube cavity through the guide tube 5, filling the entire cavity.

[0024] Positioning rods 8 are vertically installed at the four corners of the lower mold base 2. Each positioning rod 8 has a chamfer 801, which facilitates the closing of the lower mold base 2 and the upper mold base 3. Sleeves 7 are vertically installed at the four corners of the bottom of the lower mold base 2. Each sleeve 7 has a positioning groove 701 that matches the corresponding positioning rod 8. When the mold is closed, the four positioning rods 8 are inserted into the corresponding positioning grooves 701, thereby achieving the mold closing positioning of the lower mold base 2 and the upper mold base 3. Through holes are opened at both ends of the fixing plate 9. Bolts 10 are horizontally fitted in each through hole. A first threaded hole 202 and a second threaded hole 303 are opened on one side of the lower mold base 2 and the upper mold base 3, respectively. Two bolts 10 are threaded into the first threaded hole 202 and the second threaded hole 303, respectively. When the mold is closed... After completion, the fixing plate 9 is placed on the side of the lower mold base 2 and the upper mold base 3, so that the two bolts 10 pass through the through holes at both ends of the fixing plate 9 respectively, and are screwed into the first threaded hole 202 and the second threaded hole 303. By tightening the bolts 10, the lower mold base 2 and the upper mold base 3 can be firmly fixed together to prevent the injection pressure from expanding the mold. Before the mold starts working, the mold closing operation is performed first. The upper mold base 3 is driven to move downward by external power, so that the sleeve 7 at the bottom of the upper mold base 3 is sleeved on the positioning rod 8 of the lower mold base 2 under the guidance of its positioning groove 701 until the upper mold base 3 and the lower mold base 2 are completely closed. The lower mold core 201 and the upper mold core 302 together form a complete balloon guide tube cavity. Then, the fixing plate 9 and the bolts 10 are used to lock and fix the closed lower mold base 2 and the upper mold base 3.

[0025] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An injection mold for producing balloon guide tubes, comprising a base (1), characterized in that: The base (1) is equipped with a lower mold base (2) on top, and an upper mold base (3) is provided on top of the lower mold base (2). A reserved groove (301) is provided at the center of the upper mold base (3). A disc (4) is installed in the reserved groove (301). A guide hole (402) is provided at the center of the disc (4). A guide tube (5) is vertically installed at the bottom of the disc (4). The top end of the guide tube (5) is connected to the bottom end of the guide hole (402). The top of the disc (4) is provided with a circular groove (403), and a sealing ring (6) is installed in the circular groove (403). A groove (401) is provided at the center of the top of the disc (4), and the groove (401) is connected to the guide hole (402).

2. The injection mold for producing a balloon guide tube according to claim 1, characterized in that, The disc (4) has mounting grooves (404) on both sides.

3. The injection mold for producing a balloon guide tube according to claim 1, characterized in that, The lower mold base (2) is vertically installed with positioning rods (8) at each of the four corners, and each positioning rod (8) has a chamfer (801).

4. The injection mold for producing a balloon guide tube according to claim 3, characterized in that, Sleeves (7) are vertically installed at the four corners of the bottom of the lower mold base (2), and each sleeve (7) has a positioning groove (701) that matches the corresponding positioning rod (8).

5. The injection mold for producing a balloon guide tube according to claim 1, characterized in that, It also includes a fixing plate (9), both ends of which are provided with through holes, and each through hole is horizontally fitted with a bolt (10). The lower mold base (2) and the upper mold base (3) are respectively provided with a first threaded hole (202) and a second threaded hole (303) on one side, and the two bolts (10) are respectively threaded into the first threaded hole (202) and the second threaded hole (303).

6. The injection mold for producing a balloon guide tube according to claim 1, characterized in that, The lower mold base (2) has a lower mold core (201) at the top and an upper mold core (302) at the bottom. The lower mold core (201) and the upper mold core (302) contain a balloon guide tube body (11).

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