molded sleeve

Abstract

The utility model discloses a mould contracts the cover, mould contracts the cover including opening section and extension section, the inner wall of opening section is equipped with at least one lip, the lip surrounds the periphery extension of the inner wall of opening section and is set, extension section with one end of opening section is connected with opening section intercommunication setting. The utility model technical scheme improves the adhesion of mould contracts the cover and electric wire cable.

Description

Technical Field

[0001] This utility model relates to the field of heat shrink sleeve technology, and in particular to a molded sleeve. Background Technology

[0002] Currently, with the rapid development of my country's electronics industry, aerospace field, and machinery manufacturing industry, the requirements for the quantity and quality of various wire and cable connection terminals are increasing daily. To meet the connection needs of wire and cable connection terminals in the aerospace field, an aerospace molded sleeve has been developed. The aerospace molded sleeve includes an open section and an extension section, which are fixedly connected and communicate with each other. The diameter of the open section is larger than the diameter of the extension section.

[0003] However, the above solution still has some drawbacks. The design of the difference in size between the opening section and the extension section of the molded sleeve makes it difficult for the wires and cables of the connection terminal to be directly inserted into the molded sleeve, resulting in poor installation efficiency of the wires and cables of the connection terminal. In addition, the smooth and straight opening section of the molded sleeve is not conducive to the inner wall of the opening section fitting with the outer wall of the wires and cables, which affects the sealing performance. Utility Model Content

[0004] The main purpose of this utility model is to provide a shrink sleeve, which aims to improve the fit between the shrink sleeve and the wires and cables.

[0005] To achieve the above objectives, this utility model proposes a shrink sleeve, the shrink sleeve comprising:

[0006] An opening segment, wherein the inner wall of the opening segment is provided with at least one lip, the lip extending around the periphery of the inner wall of the opening segment; and

[0007] An extension segment is connected to one end of the opening segment and is configured to communicate with the opening segment.

[0008] In one embodiment, the inner wall of the opening segment is provided with three lips, which are spaced apart.

[0009] In one embodiment, the radial cross-sectional shape of the lip along the opening segment is circular or flower-shaped.

[0010] In one embodiment, the axial cross-sectional shape of the lip extending circumferentially along the opening segment is rectangular or trapezoidal.

[0011] In one embodiment, the molded sleeve has an expanded state and a contracted state;

[0012] When in the expanded state, the inner diameter of the opening segment is equal to the inner diameter of the extension segment;

[0013] When in the contracted state, the inner diameter of the opening segment is larger than the inner diameter of the extension segment.

[0014] In one embodiment, the extension segment includes:

[0015] A connecting segment, one end of which is connected to the opening segment; the inner wall of the connecting segment has at least one protruding edge extending around the periphery of the inner wall of the connecting segment; and

[0016] A retractable section, one end of which is connected to the end of the connecting section away from the opening section and is in communication with the connecting section.

[0017] In one embodiment, the convex edge has a certain thickness, which gradually decreases along the direction of the opening segment toward the extension segment.

[0018] In one embodiment, the connecting segment and the retracting segment have a certain thickness, and the thickness of the connecting segment is greater than the thickness of the retracting segment.

[0019] The molded sleeve of this utility model includes an open section and an extension section. The inner wall of the open section is provided with at least one lip, which extends around the periphery of the inner wall of the open section. The extension section is connected to one end of the open section and communicates with the open section. With this configuration, the molded sleeve improves the fit between the molded sleeve and the wires and cables by cooperating with the lip on the inner wall of the open section. In harsh environments, this ensures that the molded sleeve is not easy to fall off, thus increasing reliability. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the molded sleeve of this utility model when it is in the expanded state;

[0022] Figure 2 This is a schematic diagram of the structure of the molded sleeve of this utility model when it is in the contracted state.

[0023] Explanation of icon numbers:

[0024]

[0025]

[0026] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0027] 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.

[0028] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0029] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0030] This utility model proposes a shrink sleeve.

[0031] In this embodiment of the utility model, reference is made to Figure 1 and Figure 2 The molded sleeve includes an opening section 10 and an extension section 20. The inner wall of the opening section 10 is provided with at least one lip 10a, which extends around the periphery of the inner wall of the opening section 10. The extension section 20 is connected to one end of the opening section 10 and communicates with the opening section 10.

[0032] In this embodiment, when the die is not inserted into the wire or cable, the inner diameter of the opening section 10 is the same as the inner diameter of the extension section 20. Thus, when the wire or cable is inserted into the opening section 10 and the extension section 20, the wire or cable will not be limited in position by the reduced inner diameter of the opening section 10 or the extension section 20, making it easier for the wire or cable to be inserted into the opening section 10 and the extension section 20, and speeding up the assembly speed of the wire or cable with the die.

[0033] After the wire and cable are fully inserted into the opening section 10 and the extension section 20, the outer wall of the shrink sleeve is heated using a hot air gun or other tools. As the temperature gradually rises, the shrink sleeve shrinks radially inward and tightly fits onto the insulation sheath of the wire and cable. The opening section 10 increases its contact area with the outer wall of the wire and cable through the provided lip 10a, further improving the fit between the opening section 10 and the wire and cable.

[0034] In this embodiment, the shrink sleeve has a lip 10a on the inner wall of the opening section 10 to cooperate with the wire and cable, which improves the fit between the shrink sleeve and the wire and cable. In harsh environments, this ensures that the shrink sleeve is not easy to fall off, thus increasing reliability.

[0035] In one embodiment, reference is made to Figure 1 and Figure 2 The inner wall of the opening section 10 is provided with three lips 10a, which are equally spaced, and at least one lip is located on the inner wall of the end face of the opening section 10 away from the extension section 20. In this way, the three lips 10a of the opening section 10 further increase the contact area between it and the outer wall of the wire / cable, thereby improving the fit between the molded sleeve and the wire / cable. Furthermore, to increase the sealing performance of the fit between the molded sleeve and the wire / cable, hot melt adhesive can be coated on the inner wall of the molded sleeve to form a double-walled heat shrink tube. Then, lips 10a are added to the inner wall of the opening section 10 of the double-walled heat shrink tube. This design allows the lips 10a to both increase the fit between the opening section 10 and the wire / cable and to increase its adhesive-locking ability, thereby further improving the fit and sealing performance between the molded sleeve and the wire / cable.

[0036] Of course, in other embodiments, the inner wall of the opening segment 10 may be provided with fewer than three or more than three lips 10a depending on the actual situation, and the lips 10a may also be provided at unequal intervals.

[0037] When in the expanded state, the inner diameter of the molded sleeve opening section 10 and the extension section 20, as well as the thickness and width of the lip 10a, can be set to various dimensions according to actual needs. Examples of three dimensions are given below.

[0038] In the first embodiment, when in the expanded state, the inner diameter of the opening segment 10 is at least 23.3, the inner diameter of the extension segment 20 is at least 23.3, the width of the lip 10a is 3, and the thickness of the lip 10a is 1. When in the contracted state, the inner diameter of the opening segment 10 is at most 10.5, and the inner diameter of the extension segment 20 is at most 5.6.

[0039] In the second embodiment, when in the expanded state, the inner diameter of the opening segment 10 is at least 28.4, the inner diameter of the extension segment 20 is at least 28.4, the width of the lip 10a is 3, and the thickness of the lip 10a is 1. When in the contracted state, the inner diameter of the opening segment 10 is at most 14.3, and the inner diameter of the extension segment 20 is at least 6.6.

[0040] In the third embodiment, when in the expanded state, the inner diameter of the opening segment 10 is at least 42.7 mm, the inner diameter of the extension segment 20 is at least 42.7 mm, the width of the lip 10a is 3 mm, and the thickness of the lip 10a is 1.65 mm. When in the contracted state, the inner diameter of the opening segment 10 is at most 28.2 mm, and the inner diameter of the extension segment 20 is at least 9.9 mm.

[0041] In the above three embodiments, when in the expanded state, the inner diameter of the opening segment 10 is the same as the inner diameter of the extension segment 20, which speeds up the assembly of the wire / cable with the shrink sleeve; the width and thickness of the lip 10a are adjusted according to the inner diameter of the opening segment 10. All three embodiments enable a very good fit between the shrunken shrink sleeve and the wire / cable.

[0042] In the three embodiments above, the production process of the molded sleeve includes steps such as: material preparation, granulation, injection molding, radiation crosslinking, expansion, and product packaging. The granulated raw material is injection molded into a semi-finished product with a large inner diameter of the opening section 10 and a small inner diameter of the extension section 20, and a lip 10a extending from the periphery of the inner wall of the opening section 10. The semi-finished product undergoes radiation crosslinking and then an expansion process to expand the inner diameters of the opening section 10 and the extension section 20 to the same size and meet the specifications of the final product. The materials of the opening section 10 and the extension section 20 are the same as those of the lip 10a, such as low-density polyethylene, polyvinylidene fluoride, or saline resin.

[0043] After expansion, hot melt adhesive can be applied to the inner wall of the molded sleeve. In this way, the lip 10a can increase the fit between the opening section 10 and the wires and cables, and also increase its adhesive locking ability, thereby further improving the fit and sealing between the molded sleeve and the wires and cables.

[0044] In one embodiment, reference is made to Figure 1 and Figure 2 The lip 10a has a circular or flower-shaped radial cross-section along the opening segment 10. This configuration further reduces the diameter of the opening segment 10, making the lip 10a fit more tightly with the wires and cables. Of course, in other embodiments, the radial cross-section shape can also be other shapes.

[0045] In one embodiment, the axial cross-sectional shape of the lip 10a extending circumferentially along the opening segment 10 is rectangular or trapezoidal. In this way, the side of the rectangular or trapezoidal lip 10a has a larger contact area with the outer wall of the wire and cable, thereby improving the reliability of the connection between the lip 10a and the wire and cable. Of course, in other embodiments, the axial cross-sectional shape can also be other shapes.

[0046] In one embodiment, reference is made to Figure 1 and Figure 2The mold sleeve has an expanded state and a contracted state; when it is in the expanded state, the inner diameter of the opening section 10 is equal to the inner diameter of the extension section 20; when it is in the contracted state, the inner diameter of the opening section 10 is greater than the inner diameter of the extension section 20.

[0047] In this embodiment, the expanded state is actually the state where the molded sleeve is not heated. At this time, the inner diameter of the opening section 10 is the same as the inner diameter of the extension section 20, which facilitates the insertion of wires and cables into the molded sleeve. The contracted state is actually the state where the molded sleeve is heated, causing the molded sleeve to shrink inward. Since the expansion ratio of the molded sleeve is different when it expands, the contraction ratio of the opening section 10 and the extension section 10 is different when it contracts, so as to adapt to the connection between wires and cables with different sizes of ports, thereby allowing the wires and cables to fit more tightly with the molded sleeve.

[0048] In one embodiment, reference is made to Figure 1 and Figure 2 The extension section 20 includes a connecting section 21 and a retractable section 22. One end of the connecting section 21 is connected to the opening section 10. The inner wall of the connecting section 21 is provided with at least one protruding edge 21a, which extends around the periphery of the inner wall of the connecting section 21. One end of the retractable section 22 is connected to the end of the connecting section 21 away from the opening section 10 and communicates with the connecting section 21.

[0049] In this embodiment, the connecting segment 21 connects the retractable segment 22 and the opening segment 10. By providing a protruding edge 21a on the connecting segment 21, the connecting segment 21 can better fit the outer wall of the wire and cable after heating and retracting, thereby further improving the fit between the molded sleeve and the wire and cable.

[0050] Furthermore, referring to Figure 1 and Figure 2 The protruding edge 21a has a certain thickness, and the thickness gradually decreases from the direction of the opening section towards the direction of the extension section. In this way, when the wire or cable is inserted from the opening section 10 towards the extension section 20, the protruding edge 21a can better conform to the insertion direction of the wire or cable, and fit more tightly against the outer wall of the wire or cable when it retracts.

[0051] Furthermore, referring to Figure 1 and Figure 2 The longitudinal cross-sectional shape of the protruding edge 21a extending circumferentially along the connecting section 21 is triangular. The triangular protruding edge 21a is more likely to deform with the insertion of the wire and cable, making the protruding edge 21a fit more closely to the outer wall of the wire and cable, thereby improving the sealing performance of the molded sleeve.

[0052] Optionally, the number of protruding edges 21a provided on the inner wall of the connecting section 21 can be designed according to the actual use.

[0053] In one embodiment, reference is made to Figure 1 andFigure 2 The connecting section and the retractable section have a certain thickness, with the connecting section 21 being thicker than the retractable section 22. This design allows the thicker connecting section 21 to connect the retractable section 22 and the opening section 10, thereby increasing the structural strength between them and making the opening section 10 and the extension section 20 less prone to breakage. Furthermore, when both the connecting section 21 and the retractable section 22 are heated simultaneously, the thicker connecting section 21 adheres more tightly to the outer wall of the wire and cable, thus improving the sealing performance during shrinkage of the molded sleeve.

[0054] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the concept of the present utility model and using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.

Claims

1. A shrink sleeve, characterized in that, The molded sleeve includes: An open section, wherein the inner wall of the open section is provided with at least one lip, the lip extending around the periphery of the inner wall of the open section; and An extension segment is connected to one end of the opening segment and is configured to communicate with the opening segment.

2. The shrink sleeve as described in claim 1, characterized in that, The inner wall of the opening section is provided with three lips, which are spaced apart.

3. The shrink sleeve as described in claim 1, characterized in that, The radial cross-sectional shape of the lip edge along the opening section is circular or flower-shaped.

4. The shrink sleeve as described in claim 1, characterized in that, The axial cross-sectional shape of the lip extending circumferentially along the opening segment is rectangular or trapezoidal.

5. The shrink sleeve as described in any one of claims 1 to 4, characterized in that, The mold sleeve has an expanded state and a contracted state; When in the expanded state, the inner diameter of the opening segment is equal to the inner diameter of the extension segment; When in the contracted state, the inner diameter of the opening segment is larger than the inner diameter of the extension segment.

6. The shrink sleeve as described in claim 1, characterized in that, The extension segment includes: A connecting segment, one end of which is connected to the opening segment; the inner wall of the connecting segment has at least one protruding edge extending around the periphery of the inner wall of the connecting segment; and A retractable section, one end of which is connected to the end of the connecting section away from the opening section and is in communication with the connecting section.

7. The shrink sleeve as described in claim 6, characterized in that, The convex edge has a thickness that gradually decreases along the direction of the opening segment toward the extension segment.

8. The shrink sleeve as described in claim 6, characterized in that, The connecting section and the retracting section have thicknesses, and the thickness of the connecting section is greater than the thickness of the retracting section.

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