Demolding nozzle of medical balloon demolding machine

Abstract

The utility model relates to the technical field of production equipment of medical instruments, in particular to a demolding nozzle of a medical balloon demolding machine. Comprising a nozzle body fixedly connected to a spraying pipe, the nozzle body is of a tubular structure with an interlayer space on the pipe wall, an inner cavity of the nozzle body is of a cylindrical structure matched with a medical balloon mold, and spraying holes communicated with the inner cavity of the nozzle body and the interlayer space are formed in the inner wall of the nozzle body. And a through hole for communicating the interlayer space with the inner cavity of the spraying pipe is formed in the outer wall of the nozzle body. According to the demoulding nozzle, a plurality of high-pressure water flows surrounding the periphery of the mould are used for impacting a balloon mould to realize demoulding, the jet demoulding effect can be effectively improved, the damage to a balloon latex layer is small, the demoulding efficiency is high, and the manufacturing cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of production equipment for medical devices, in particular to a demoulding nozzle of a medical balloon demoulding machine. Background Art

[0002] Medical latex balloons are produced by dipping a rod-shaped mold in liquid latex, allowing the latex to adhere to the mold surface to form a latex film, which is then dried and demolded. The demolding process is time-consuming and labor-intensive, and has a high scrap rate. This is because the diameter and wall thickness of medical latex balloons are very small (millimeter level), and the current demolding method is still mainly manual demolding. The thin-walled structure of the latex balloon requires high uniformity and integrity of the wall thickness. Manual or robotic demolding can easily pull and damage the latex layer. Chinese Patent 202310580165X discloses "An Automated Demolding Device for Medical Latex Balloons," publication number CN116442439A. This demolding device sets air holes in the mold, and during demolding, air is inflated into the latex through the air holes, forming a thin gas film between the latex layer and the mold, thereby allowing the latex balloon to fall off the mold. However, as mentioned above, the diameter of the medical latex balloon body is very small, and the diameter of the mold is even smaller, only 1-2 mm. It is very difficult to set pores and airways connecting the pores in the mold, and it will greatly increase the manufacturing cost of the mold. In addition, since the aperture of the pores is very small, the pores are easily blocked during actual use, and the pores need to be frequently flushed with high-pressure airflow, and the actual use effect is not ideal. Another Chinese patent application 2023118215083 of the applicant discloses "An automated production method and production equipment for medical balloons", publication number CN117621338A, in which the demoulding step is completed in the demoulding groove, and the water flow sprayed from the nozzle is used to impact the balloon mold with the formed latex layer to complete the demoulding. It can effectively avoid damage to the latex layer during the demoulding process, improve demoulding efficiency and reduce scrap rate. However, the demoulding nozzle disclosed in the above patent application can only spray water obliquely downward from one side of the mold, requiring higher water pressure and relatively long demoulding time. Summary of the Invention

[0003] The utility model aims to provide a demoulding nozzle for a medical balloon demoulding machine, which improves the jet demoulding effect and the demoulding efficiency.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] The demoulding nozzle of a medical balloon demoulding machine described in the utility model includes a nozzle body fixedly connected to a spray pipe, the nozzle body is a tubular structure with an interlayer space on the tube wall, the inner cavity of the nozzle body is a cylindrical structure adapted to the medical balloon mold, the inner wall of the nozzle body is provided with a spray hole connecting the inner cavity of the nozzle body and the interlayer space, and the outer wall of the nozzle body is provided with a through hole connecting the interlayer space and the inner cavity of the spray pipe.

[0006] The above technical solution can effectively improve the jet demoulding effect and enhance the demoulding efficiency.

[0007] Preferably, the 2-4 spray holes are evenly distributed around the axis of the nozzle body, and the axes of the spray holes are inclined downward to intersect with the axis of the nozzle body.

[0008] Through the above technical solution, the latex layer on the mold is evenly stressed during demoulding by the jet of the nozzle.

[0009] Preferably, the 2-4 spray holes are evenly distributed around the axis of the nozzle body, and the axis of the spray holes is inclined downward and deviates to one side of the axis of the nozzle body.

[0010] Through the above technical solution, when the nozzle jet is demoulding, multiple jet water streams generate a certain spiral torsional force, which is beneficial to improving the demoulding efficiency.

[0011] Preferably, the nozzle body comprises an inner tube wall and an outer tube wall which are coaxially arranged, and an annular end cap is fixedly connected to both ends of the inner tube wall and the outer tube wall.

[0012] Through the above technical solution, the nozzle body has a simple structure and is easy to process and manufacture.

[0013] Preferably, the cross-section of the outer tube wall is a circular or regular polygonal structure.

[0014] Through the above technical solution, the structure of the outer tube wall is simple and easy to process and manufacture.

[0015] Compared with the existing technology, the beneficial effect of the utility model is that the demolding of the balloon mold is achieved by impacting the balloon mold with multiple high-pressure water streams surrounding the mold, which can effectively improve the jet demolding effect, cause little damage to the balloon latex layer, have high demolding efficiency and low manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of an embodiment of the present utility model.

[0017] Figure 2 It is a schematic diagram of the transverse cross-sectional structure of an embodiment of the nozzle body of the present utility model.

[0018] Figure 3 It is a schematic diagram of the transverse cross-sectional structure of another embodiment of the nozzle body.

[0019] Figure 4 for Figure 1 Schematic diagram of the three-dimensional structure of the embodiment in use state.

[0020] Figure 5 It is a schematic diagram of the top view of the demoulding tank with a mold rack. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] like Figure 1 As shown, the demolding nozzle of a medical balloon demolding machine described in the present invention includes a nozzle body 3 fixedly connected to a spray pipe 2. The nozzle body 3 is made of a corrosion-resistant material such as stainless steel. The nozzle body 3 is a tubular structure with an interlayer space 33 in the tube wall. The inner cavity of the nozzle body 3 is a cylindrical structure adapted to fit the medical balloon mold. The inner cavity diameter of the nozzle body 3 is slightly larger than the diameter of the medical balloon mold. During demolding, the medical balloon mold can be inserted into the inner cavity of the nozzle body 3 without contact. The nozzle body 3 includes a coaxial inner tube wall 34 and an outer tube wall 35. The inner tube wall 34 and the outer tube wall 35 are both tubular structures. The inner tube wall 34 is a circular tube structure with a circular cross-section, while the outer tube wall 35 can have a circular cross-section or a regular polygonal structure, such as a regular pentagon or regular hexagon. Annular end caps 36 are fixedly connected to the ends of the inner tube wall 34 and the outer tube wall 35. The end caps 36 seal the ends of the interlayer space 33, forming a closed space.

[0023] like Figure 2 、 Figure 3 As shown, the inner wall of the nozzle body 3 is provided with a spray hole 31 connecting the inner cavity of the nozzle body 3 and the interlayer space 33. The spray hole 31 passes through the inner tube wall 34, and 2-4 spray holes 31 are evenly distributed around the axis of the nozzle body 3. Figure 1 、 Figure 2 As shown in FIG. 1 , in one embodiment of the present invention, the axis of the spray hole 31 is tilted downward and intersects with the axis of the nozzle body 3. Figure 1 、 Figure 3 As shown in FIG. 1 , as another embodiment of the present invention, the axis of the spray hole 31 is tilted downward and deviates to one side of the axis of the nozzle body 3 .

[0024] During use, the balloon mold 11 with the latex layer is inserted into the inner cavity of the nozzle body 3, and the spray holes 31 spray water from multiple directions to impact the upper end of the latex layer, flushing it down to complete the demolding.

[0025] In addition, a through hole 32 is provided on the outer wall of the nozzle body 3 to connect the interlayer space 33 with the inner cavity of the spray pipe 2. The through hole 32 passes through the outer pipe wall 35, allowing the pure water in the spray pipe 2 to enter the interlayer space 33 of the nozzle body 3 through the through hole 32.

[0026] like Figure 4 、 Figure 5 As shown, the demoulding nozzle of a medical balloon demoulding machine described in the present invention is used in a demoulding device for medical balloons, and the demoulding device includes a demoulding water tank 1 and a mold rack 9 installed at the upper end of the demoulding water tank 1; the demoulding water tank 1 is a rectangular trough-like structure made of stainless steel plate with an upper end open and a lower end for drainage. A spray pipe 2 connected to a water supply device is provided in the inner cavity of the demoulding water tank 1. The mold rack 9 is a horizontally arranged flat plate structure supported by the periphery of the demoulding water tank 1. The mold rack 9 is provided with a through hole 91 for accommodating the balloon mold 11 to pass through. The through hole 91 can be a circular hole adapted to the diameter of the balloon mold, or it can be a hole such as Figure 2 The long hole shown is adapted to accommodate and allow a row of balloon molds 11 to be placed simultaneously; the spray pipe 2 is horizontally arranged below the mold frame 9, and the two ends of the spray pipe 2 are respectively inserted through the opposite side walls of the demolding tank 1. Multiple spray pipes 2 are arranged at equal intervals, and the gap between adjacent spray pipes 2 is larger than the diameter of the balloon mold 11 on the mold frame, and it is convenient to set up the nozzle body 3. The fixed welded on the side wall of the spray pipe 2 corresponds to the balloon mold extending to the bottom of the mold frame 9 through the through hole 91. Figure 4 As shown, the end of the spray pipe 2 is connected to the circulating water tank 4 through a pressure pump, and the water in the circulating water tank 4 can be pumped into the spray pipe 2 and sprayed out from the nozzle body 3. The high-pressure water flow sprayed from the nozzle body 3 impacts the latex layer that has been cooled and shaped on the balloon mold 11, flushing it down to complete the demolding.

[0027] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A demoulding nozzle for a medical balloon demoulding machine, comprising a nozzle body (3) fixedly connected to a spray pipe (2), characterized in that: The nozzle body (3) is a tubular structure with an interlayer space (33) on the tube wall. The inner cavity of the nozzle body (3) is a cylindrical structure adapted to a medical balloon mold. A spray hole (31) connecting the inner cavity of the nozzle body (3) and the interlayer space (33) is provided on the inner wall of the nozzle body (3). A through hole (32) connecting the interlayer space (33) and the inner cavity of the spray pipe (2) is provided on the outer wall of the nozzle body (3).

2. The demoulding nozzle of the medical balloon demoulding machine according to claim 1, characterized in that: 2-4 spray holes (31) are evenly distributed around the axis of the nozzle body (3), and the axis of the spray holes (31) is tilted downward to intersect with the axis of the nozzle body (3).

3. The demoulding nozzle of the medical balloon demoulding machine according to claim 1, characterized in that: 2-4 spray holes (31) are evenly distributed around the axis of the nozzle body (3), and the axis of the spray holes (31) is inclined downward and deviates to one side of the axis of the nozzle body (3).

4. A demoulding nozzle for a medical balloon demoulding machine according to any one of claims 1 to 3, characterized in that: The nozzle body (3) comprises an inner tube wall (34) and an outer tube wall (35) which are coaxially arranged, and an annular end cover (36) is fixedly connected to both ends of the inner tube wall (34) and the outer tube wall (35).

5. The demoulding nozzle of the medical balloon demoulding machine according to claim 4, characterized in that: The cross section of the outer tube wall (35) is a circular or regular polygonal structure.

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