Hose protector sleeve forming mold

Abstract

The utility model discloses a kind of hose protective sleeve forming die, including sequentially stacked from bottom to top lower die plate, middle die plate and upper die plate, the top surface of the lower die plate is provided with several end forming cavities along array, and the cavity wall of the end forming cavity is configured to be adapted to the end outer surface of hose protective sleeve, the middle die plate is provided with several main body forming cavities penetrating its upper and lower surface, the cavity wall structure of the main body forming cavity is adapted to the main body outer surface of hose protective sleeve, and each the main body forming cavity and the end forming cavity one-to-one correspondence communication, the bottom surface of the upper die plate is provided with several core inserts, the outer wall of the core insert is configured to be used for shaping the entire inner cavity curved surface of hose protective sleeve, the main body forming cavity and the end forming cavity sequentially passed by the core insert when clamping, and the bottom end face of the core insert and the groove bottom of the end forming cavity are closely contacted.

Description

Technical Field

[0001] This utility model relates to the field of silicone products technology, specifically to a mold for forming a flexible tube protective sleeve. Background Technology

[0002] Laparoscopic surgery, as a minimally invasive surgical technique, is increasingly widely used in modern medicine. Laparoscopic surgery requires the use of various slender surgical instruments, which are typically inserted into the patient's body through a channel called a "trocar." To protect the laparoscope's fiber optic tubing, cables, and other delicate components from wear, compression, or contamination when passing through the trocar, a flexible protective sleeve is usually fitted over it.

[0003] Existing tubing protective sleeves are typically made of elastic materials such as silicone. Their structure includes a hollow main body and special structures at the ends (such as flares, flanges, etc.) for sealing connections with puncture instruments or other devices. The inner cavity of these protective sleeves usually also needs to be equipped with a sealing structure or achieve an interference fit with other components to ensure airtightness.

[0004] Currently, injection molding of these complex hose protective sleeves presents numerous challenges. Traditional molds often struggle to mold parts with complex internal and external contours in a single, complete process, especially the delicate sealing structures within the inner cavity. Common practices involve molding multiple components separately and then assembling them, or using complex slider core-pulling mechanisms. This results in low production efficiency, high mold costs, and the assembly process may introduce risks of unstable quality and poor sealing performance. Utility Model Content

[0005] The purpose of this invention is to provide a mold for forming a flexible tube protective sleeve to solve the above-mentioned problems.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A mold for forming a hose protective sleeve includes a lower template, a middle template, and an upper template stacked sequentially from bottom to top. The top surface of the lower template has a plurality of end forming cavities arranged in an array, and the cavity walls of the end forming cavities are configured to fit the outer surface of the end of the hose protective sleeve. The middle template has a plurality of main forming cavities extending through its upper and lower surfaces, and the cavity walls of the main forming cavities are configured to fit the outer surface of the main body of the hose protective sleeve. Each main forming cavity is connected to an end forming cavity. The bottom surface of the upper template has a plurality of core inserts, and the outer wall of the core inserts is configured to form the entire inner surface of the hose protective sleeve. When the mold is closed, the core inserts pass through the main forming cavities and the end forming cavities in sequence, and the bottom end face of the core inserts is in close contact with the bottom of the groove of the end forming cavity. The outer wall of the core inserts has an upper annular groove and a lower annular protrusion arranged sequentially from top to bottom along the circumferential direction to form the upper sealing mounting strip and the lower sealing mounting groove of the inner cavity of the hose protective sleeve, respectively.

[0008] Preferably, the cavity wall of the main body forming cavity is provided with a plurality of relief protrusions along the circumferential direction to form anti-slip grooves on the smooth outer surface of the main body of the hose protective sleeve.

[0009] Preferably, the bottom of the end forming cavity is provided with a positioning groove, and the bottom end of the core insert is provided with a positioning boss that fits into the positioning groove.

[0010] Preferably, the top of the core insert is provided with a connector, the top surface of the connector is provided with a threaded hole, the upper template is provided with a connecting hole, and a connecting bolt that is threaded into the threaded hole is inserted into the connecting hole.

[0011] Preferably, the top edge of the lower template is provided with a plurality of positioning guide posts, and the middle template and the upper template are respectively provided with positioning guide holes that are clearance-fitted with the positioning guide posts.

[0012] Preferably, the top surface of the middle template is provided with an injection groove, the main molding cavity is opened at the bottom of the injection groove and extends downward through the bottom surface of the middle template, the height of the top channel opening of the main molding cavity is not higher than the height of the bottom of the injection groove, and the top surface of the upper template is provided with a plurality of injection holes communicating with the injection groove.

[0013] By adopting the above technical solution, this utility model has the following advantages compared with the prior art:

[0014] 1. This utility model provides a mold for forming a flexible tube protective sleeve. Through a three-layer superimposed structure of a lower template, a middle template and an upper template, and in conjunction with a core insert with a composite curved surface, the forming tasks of the end structure, the main structure and the complex inner cavity curved surface of the protective sleeve are completed in one go after the mold is closed. This avoids the problems of complicated procedures and poor sealing caused by the assembly of multiple parts in the traditional method, and greatly improves production efficiency and product consistency.

[0015] 2. This utility model provides a mold for forming a hose protective sleeve. The upper annular groove and lower annular protrusion on the core insert can directly and accurately mold the groove for installing the sealing ring and the protrusion for interference fit in the inner cavity of the hose protective sleeve. This one-piece molding structure ensures the dimensional accuracy and shape integrity of the sealing structure, fundamentally guaranteeing the airtightness and connection reliability of the protective sleeve during use. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the present invention with the upper template removed;

[0018] Figure 3 This is a schematic diagram of the lower template structure of this utility model;

[0019] Figure 4 This is a partial enlarged view of the end forming cavity of this utility model;

[0020] Figure 5 This is a schematic diagram of the template structure in this utility model;

[0021] Figure 6 This is a partial enlarged view of the molding cavity of the main body of this utility model;

[0022] Figure 7 This is a schematic diagram of the upper template structure of this utility model;

[0023] Figure 8 This is a schematic diagram of the core insert structure of this utility model;

[0024] Figure 9 This is a schematic diagram of the flexible hose protective sleeve structure of this utility model. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0026] It should be noted that in this utility model, the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", and "outer" are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element of this utility model must have a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] Example

[0028] Please refer to Figures 1 to 9 As shown, this utility model discloses a mold for molding a flexible tube protective sleeve, used for one-time injection molding of a laparoscopic flexible tube protective sleeve 5 made of elastic materials such as silicone. The mold includes a lower template 1, a middle template 2, and an upper template 3 stacked sequentially from bottom to top. These three templates are precisely positioned by a guiding mechanism and together form the main frame of the mold. The three-layer plate structure can efficiently and precisely mold a flexible tube protective sleeve with complex internal and external morphology.

[0029] The top surface of the lower template 1 is provided with a plurality of end forming cavities 11 arranged in an array along its length. The cavity wall structure of the end forming cavity 11 is adapted to the outer surface of the end of the hose protective sleeve 5 to be formed, so as to accurately form the external shape of this part. In order to further ensure the positioning accuracy of the core when the mold is closed and to prevent eccentricity, a positioning groove 12 is provided at the center of the groove bottom of the end forming cavity 11.

[0030] The middle mold plate 2 is stacked on top of the lower mold plate 1. The middle mold plate 2 is provided with main molding cavities 21 that correspond one-to-one in number and position to the end molding cavities 11. The main molding cavity 21 is a through hole penetrating the upper and lower surfaces of the middle mold plate 2, and its cavity wall structure is adapted to the outer surface of the main body of the hose protective sleeve 5. When the mold is closed, the lower end of each main molding cavity 21 is connected to the corresponding end molding cavity 11, together forming a complete external cavity of the product.

[0031] The cavity wall of the main molding cavity 21 is evenly provided with four raised relief strips 22 along the circumference. During injection molding, these relief strips 22 will correspondingly form four recessed anti-slip grooves 51 on the smooth outer surface of the tubular protective sleeve 5, which is used to improve the anti-slip performance of the protective sleeve after molding, so as to facilitate medical staff to operate steadily in a wet and slippery surgical environment.

[0032] The top surface of the middle mold plate 2 is also provided with a glue injection groove 23 that connects to the top of all the main molding cavities 21. The main molding cavities 21 are located at the bottom of the glue injection groove 23 and extend downward through the bottom surface of the middle mold plate 2. The height of the plane where the top channel of the main molding cavity 21 is located is not higher than the height of the plane where the bottom of the glue injection groove 23 is located, which is conducive to the smooth and uniform flow of molten glue into each cavity and avoids turbulence or insufficient filling. The top surface of the upper mold plate 3 is provided with four glue injection holes 31 that communicate with the glue injection groove 23 for connecting the nozzle of the injection molding machine.

[0033] The bottom surface of the upper template 3 is provided with several core inserts 4, the number and position of which correspond one-to-one with the main molding cavity 21. The core inserts 4 are fixed to the upper template 3 in a detachable manner. The top of the core insert 4 is provided with a cylindrical connector 41. A threaded hole is opened in the center of the top surface of the connector 41. A corresponding connecting hole is opened on the upper template 3. A connecting bolt 32 is inserted into the connecting hole. The connecting bolt 32 is screwed downward into the threaded hole, thereby firmly fixing the core insert 4 to the upper template 3, which facilitates later maintenance and replacement.

[0034] The outer wall of the core insert 4 is constructed to form the entire inner cavity curved surface for molding the hose protective sleeve 5. A positioning boss 42 is provided at its lower end corresponding to the positioning groove 12 of the lower mold plate 1. During mold closing, the core insert 4 passes sequentially through the main forming cavity 21 of the middle mold plate 2 and the end forming cavity 11 of the lower mold plate 1, and its bottom positioning boss 42 is finally tightly embedded in the positioning groove 12 of the lower mold plate 1, forming a tight fit. At this time, the bottom end face of the core insert 4 is in close contact with the bottom of the end forming cavity 11, thereby sealing the bottom of the cavity. The outer wall of the core insert 4 is circumferentially machined with an upper annular groove 43 and a lower annular protrusion 44 from top to bottom. The upper annular groove 43 is used to form an annular upper sealing mounting strip 52 (usually used to clamp O-rings) in the upper part of the inner cavity of the hose protective sleeve 5, and the lower annular convex strip 44 is used to form an annular lower sealing mounting groove 53 (usually used to form an interference fit with the sealing port of the puncture device) in the lower part of the inner cavity of the hose protective sleeve 5. The cooperation between the upper annular groove 43 and the lower annular convex strip 44 is crucial to ensuring the sealing performance of the protective sleeve.

[0035] To ensure the alignment accuracy between the mold plates during mold closing, four positioning guide pillars 13 are provided on the top edge of the lower mold plate 1. Correspondingly, positioning guide holes (not labeled in the figure) are provided at corresponding positions on the middle mold plate 2 and the upper mold plate 3, which are clearance-fitted with the positioning guide pillars 13. The precise fit between the positioning guide pillars 13 and the positioning guide holes ensures the mold closing accuracy under high-speed operation and effectively prevents the generation of flash.

[0036] The mold operation process in this embodiment is as follows:

[0037] Mold Closure: First, the lower mold plate 1 is fixed to the lower platen of the injection molding machine. The middle mold plate 2 and the upper mold plate 3 are precisely aligned and closed sequentially through the positioning guide pins 13 and positioning guide holes. During this process, the core insert 4 passes through the main molding cavity 21 of the middle mold plate 2 and the end molding cavity 11 of the lower mold plate 1 in sequence. The positioning boss 42 at its bottom end is finally tightly embedded in the positioning groove 12, so that the bottom end face of the core insert 4 is tightly fitted with the bottom of the groove of the end molding cavity 11. At this point, the end molding cavity 11, the inner wall of the main molding cavity 21, and the outer wall of the core insert 4 together form a complete and closed cavity.

[0038] Injection molding: Molten liquid silicone is injected through the injection hole 31 of the upper mold plate 3 using an injection molding machine. The silicone first fills the injection groove 23, and then, under pressure, it passes evenly and smoothly through the inlet at the top of the main molding cavity 21, filling the entire cavity from top to bottom.

[0039] Holding pressure and cooling: Maintain a certain injection pressure to compensate for the cooling shrinkage of the rubber compound. Subsequently, the cooling system is activated to allow the rubber compound in the cavity to cool and solidify fully.

[0040] Mold Opening and Part Removal: After cooling, the mold is opened sequentially. First, the injection molding machine pulls the upper mold plate 3 upward, and the core insert 4 is pulled out from the inner cavity of the formed hose protective sleeve 5. Then, the middle mold plate 2 and the lower mold plate 1 are separated. Finally, the formed hose protective sleeve 5 is removed from the end forming cavity 11 of the lower mold plate 1 by a robot or ejection mechanism, thus completing one production cycle.

[0041] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. A mold for forming a flexible hose protective sleeve, characterized in that: The system includes a lower template, a middle template, and an upper template stacked sequentially from bottom to top. The top surface of the lower template has several end forming cavities arranged in an array, and the cavity walls of the end forming cavities are configured to fit the outer surface of the end of the hose protective sleeve. The middle template has several main forming cavities extending through its upper and lower surfaces, and the cavity walls of the main forming cavities are configured to fit the outer surface of the main body of the hose protective sleeve. Each main forming cavity corresponds to and is connected to one of the end forming cavities. The bottom surface of the upper template has several core inserts, and the outer wall of each core insert is configured to form the entire inner curved surface of the hose protective sleeve. When the mold is closed, the core inserts pass through the main forming cavities and the end forming cavities in sequence, and the bottom end face of each core insert is in close contact with the bottom of the groove of the end forming cavity. The outer wall of each core insert has an upper annular groove and a lower annular protrusion arranged circumferentially from top to bottom to form the upper sealing mounting strip and the lower sealing mounting groove of the inner cavity of the hose protective sleeve, respectively.

2. The flexible hose protective sleeve forming mold as described in claim 1, characterized in that: The cavity wall of the main body molding cavity is provided with several relief protrusions along the circumference to form anti-slip grooves on the smooth outer surface of the main body of the hose protective sleeve.

3. The flexible hose protective sleeve forming mold as described in claim 1, characterized in that: The bottom of the end forming cavity is provided with a positioning groove, and the bottom of the core insert is provided with a positioning boss that fits into the positioning groove.

4. The flexible hose protective sleeve forming mold as described in claim 1, characterized in that: The top of the core insert is provided with a connector, the top surface of the connector is provided with a threaded hole, the upper template is provided with a connection hole, and a connecting bolt that is threaded into the threaded hole is inserted into the connection hole.

5. The flexible hose protective sleeve forming mold as described in claim 1, characterized in that: The lower template has several positioning guide posts on its top edge, and the middle and upper templates have corresponding positioning guide holes that fit with the positioning guide posts.

6. The flexible hose protective sleeve forming mold as described in claim 1, characterized in that: The top surface of the middle template is provided with a glue injection groove, the main molding cavity is opened at the bottom of the glue injection groove and extends downward through the bottom surface of the middle template, the height of the top channel opening of the main molding cavity is not higher than the height of the bottom of the glue injection groove, and the top surface of the upper template is provided with a plurality of glue injection holes communicating with the glue injection groove.

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