Wire marking tube and core rod

Abstract

The utility model discloses a wire marking tube and a core rod. The inner teeth on the inner surface of the wire marking pipe comprise a plurality of short teeth and at least three long teeth. The utility model further provides a wire marking pipe. The inner surface of the wire marking pipe comprises at least three inner teeth with the ends capable of being elastically bent. The number of the long teeth or the inner teeth of the flexible structure is at least one within the range of each equally-divided central angle on the inner surface of the wire marking pipe. The number of the equally-divided central angle ranges is at least three. The core rod is specially used for manufacturing the wire marking pipe in any embodiment of the invention. When the wire marking pipe is arranged on a cable in a sleeving mode, the cable can be held by the long teeth of the wire marking pipe, and the wire marking pipe is not prone to loosening.

Description

Technical Field

[0001] This application relates to the field of wire marking tube manufacturing technology, and more particularly to a wire marking tube and a mandrel. Background Technology

[0002] A wire marking tube is a sleeve used for wiring identification. It has internal teeth, which are ribs that are raised on the inner wall of the wire marking tube and extend along the axial direction. These teeth are used to increase the friction between the wire marking tube and the cable. It can be fitted onto the cable. The material is generally PVC and it is suitable for wiring from 0.5 to 6.0 square millimeters.

[0003] The production of wire gauge tubes is carried out through an extruder. After the PVC material is melted, it is extruded through a screw, mandrel, and die, and then cooled and shaped to finally form wire gauge tubes.

[0004] Existing wire marking tubes typically have low internal teeth, such as a 0.2mm protrusion. In practical use, it has been found that such protrusions are not effective in securing the cable. Therefore, a wire marking tube that can effectively fix the cable in place and prevent it from loosening is needed. Utility Model Content

[0005] This application provides a wire number tube and a core rod, which solves the problem of the wire number tube becoming loose when it is sleeved on the cable.

[0006] In a first aspect, embodiments of this application provide a wire marking tube, wherein internal teeth distributed on the inner surface of the wire marking tube include a plurality of short teeth and at least three long teeth. At least one long tooth is present within each equally divided central angle range on the inner surface of the wire marking tube; and there are at least three equally divided central angle ranges.

[0007] Furthermore, several short teeth are provided between adjacent long teeth.

[0008] In one embodiment, the wire tube is made of PVC.

[0009] In one embodiment, there are three long teeth arranged in an equilateral triangle on the cross-section of the wire tube.

[0010] Secondly, embodiments of this application also provide a wire marking tube, the inner surface of which is distributed with at least three elastically bendable internal teeth. At least one internal tooth is present within each equally divided central angle range on the inner surface of the wire marking tube; and there are at least three equally divided central angle ranges.

[0011] In one embodiment, the wire tube is made of PVC.

[0012] In one embodiment, there are three internal teeth arranged in an equilateral triangle on the cross-section of the wire tube.

[0013] Thirdly, embodiments of this application also provide a mandrel specifically for manufacturing the wire gauge tube described in any of the embodiments of the first or second aspect. The outer surface of the mandrel is provided with at least three deep grooves parallel to the axial direction. These deep grooves are for forming the long teeth or flexibly bendable internal teeth; at least one of the deep grooves is located within a central angle range evenly distributed on the outer surface of the mandrel.

[0014] In one embodiment, the outer surface is provided with a plurality of shallow grooves parallel to the axial direction in the circumferential direction.

[0015] In one embodiment, the mandrel is made of aluminum.

[0016] The above-described technical solutions adopted in the embodiments of this application can achieve the following beneficial effects:

[0017] When the wire marking tube described in this application is sleeved on the cable, the cable will be held by the long teeth of the wire marking tube, and the wire marking tube will not loosen, that is, it will neither rotate circumferentially on the surface of the cable nor slide axially. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0019] Figure 1 A wire gauge tube structure diagram provided in this application embodiment;

[0020] Figure 2 Another wire gauge tube structure diagram provided in this application embodiment;

[0021] Figure 3 A cross-sectional view of a mandrel structure provided in an embodiment of this application. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] The technical solutions provided by the various embodiments of this application are described in detail below with reference to the accompanying drawings.

[0024] Figure 1This application provides a structural diagram of a wire marking tube, wherein the inner surface of the wire marking tube has internal teeth comprising a plurality of short teeth 12 and at least three long teeth 11. The height of the long teeth is greater than that of the short teeth. At least one long tooth is present within each equally divided central angle range on the inner surface of the wire marking tube; there are at least three such equally divided central angle ranges.

[0025] For example, if there are three long teeth on the inner surface of the wire tube, the inner surface of the wire tube is divided into three 120° central angle ranges along the circumference, and one long tooth is set in each 120° central angle range.

[0026] At least one of the long teeth is located within a central angle range evenly distributed on the inner surface of the wire gauge tube. This ensures that the three long teeth are arranged in a triangle on the cross-section of the wire gauge tube, without limiting their specific positions, for stable clamping of the wire extending into the wire gauge tube. Preferably, there are three long teeth arranged in an equilateral triangle on the cross-section of the wire gauge tube.

[0027] Furthermore, to increase the friction on the inner surface, several short teeth are provided between adjacent long teeth. Several short teeth are provided on the inner surface of the tube between adjacent long teeth; for example, the long teeth and short teeth have different heights but the same width.

[0028] Preferably, the wire tube is made of PVC, with the long teeth having a height of 0.9mm and a width of 0.2mm; and the short teeth having a height of 0.2mm and a width of 0.2mm.

[0029] This application also provides a wire gauge tube, such as... Figure 2 The inner surface of the tube shown contains at least three flexible internal teeth 13. There is at least one internal tooth in each equally divided central angle range on the inner surface of the tube; there are at least three such equally divided central angle ranges.

[0030] The internal teeth are flexible, allowing the tooth body to bend elastically when its ends press against the cable.

[0031] For example, when the tip of the internal tooth of a flexible structure comes into contact with a hard object, it will randomly deflect to both sides.

[0032] The flexibility here is determined by the material and the ratio between the height and width of the inner teeth. That is, for example, when the material is plastic, it has a certain degree of elasticity, and when the ratio of height to width is greater than a set value, or in other words, when the ratio of the length of any segment of the inner tooth in the height direction to the width within that segment is greater than a set value, the tooth body can elastically bend under the pressure of the cable sheath. Therefore, when the width of the inner teeth is limited, appropriately increasing the height of the inner teeth can optimize the inner teeth into elastically bendable ones. For example, short teeth cannot bend because their height is no greater than their width, while long teeth have a height greater than short teeth, and the height of the long teeth is significantly greater than their width.

[0033] In the embodiments of this application, preferably, the long tooth 11 is a kind of elastically bendable internal tooth 13.

[0034] The material used in the production line marking tube, when small in size (i.e., the short teeth described in this application), has relatively rigid physical properties, meaning it is not easily bent elastically, or its elastic bending is very small. However, when its size increases (i.e., the long teeth described in this application), its physical properties become flexible. When encountering external force, the elastic bending that occurs is larger. Therefore, when the inner teeth are set as flexible long teeth, when the cable enters the marking tube, it will push the long teeth aside, causing them to deflect to one side. Due to the elastic bending, the flexible material will give the long teeth a spring force to return to their original shape. The three long teeth form a triangular elastic force to hold the cable in place, preventing the cable from rotating or shifting. Preferably, there are three elastically bendable inner teeth, arranged in an equilateral triangle on the cross-section of the marking tube.

[0035] Preferably, the wire tube is made of PVC, and the height of the long teeth or the flexible internal teeth is 0.9 mm and the width is 0.2 mm.

[0036] Furthermore, the width of the long teeth in the first aspect and the inner teeth of the flexible structure in the second aspect can be consistent along the height, or they can be thinner at the top and thicker at the bottom.

[0037] In the cross-sectional view, the top of the internal teeth (including the long teeth or the internal teeth of the flexible structure) can be arc-shaped, pointed, or flat.

[0038] It should be noted that the internal teeth mentioned in this application refer to the tooth-like shape on the cross-section of the wire tube, and the internal teeth are strip-shaped structures extending parallel to the axial direction of the wire tube on the inner surface of the wire tube.

[0039] Figure 3 This is a cross-sectional view of a mandrel structure provided for an embodiment of this application, specifically used for manufacturing the wire gauge tube described in any embodiment of this application. The outer surface of the mandrel is provided with at least three deep grooves 21 parallel to the axial direction, with at least one deep groove within a central angle range evenly divided on the outer surface of the mandrel. These grooves are used to machine and form the long teeth or elastically bendable internal teeth. For example, the outer surface is evenly divided into 120° ranges, with one deep groove within each 120° range.

[0040] The outer diameter of the mandrel can be the same as or different from the inner diameter of the wire tube. Since the inner diameter of the wire tube can be reduced or expanded by stretching and vacuuming, the outer diameter of the mandrel is not further limited.

[0041] For example, in the production process using an extruder, PVC material is melted, extruded through a screw, and then cooled and shaped by a mandrel and die to finally form a wire tube.

[0042] For example, a thick tube made of PVC or other materials used for production line tubes is fitted onto a mandrel and heated. The material of the production line tube shrinks and tightly grips the mandrel. Since there are deep grooves on the outer surface of the mandrel, the material penetrates into the deep grooves. After shaping, a tube with long teeth is produced.

[0043] Furthermore, several shallow grooves parallel to the axial direction are provided on the outer surface circumferentially. If the produced wire tube requires short teeth on the inner surface, several shallow grooves 22 parallel to the axial direction can be provided on the outer surface of the mandrel for machining the short teeth. For example, the short teeth can be produced at the shallow grooves by an extruder.

[0044] Several shallow grooves are provided between adjacent deep grooves. For example, the outer surface is evenly divided into ranges of 120° central angles; there are 3 shallow grooves within each 120° range. The central angle between adjacent grooves is 30°.

[0045] Preferably, the depth of the deep groove is 0.4 to 0.9 mm and the width is 0.2 mm.

[0046] Preferably, the shallow groove has a depth of 0.2 to 0.3 mm and a width of 0.3 mm.

[0047] For example, such as Figure 3 As shown, the outer diameter of the mandrel is 6 mm, with the deep groove having a depth of 0.9 mm and a width of 0.2 mm. The shallow groove has a depth of 0.2 mm and a width of 0.3 mm. Preferably, the mandrel is made of aluminum.

[0048] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A leader tube characterized by, The inner teeth distributed on the inner surface of the thread number tube include several short teeth and at least three long teeth; The long teeth are at least one in each of the equalized central angle range of the inner surface of the thread number tube, and the equalized central angle range is at least three.

2. The wire number tube of claim 1, wherein, The short teeth are arranged between the adjacent long teeth.

3. The wire number tube of claim 1, wherein, The thread number tube is made of PVC.

4. The wire marker of claim 1, wherein, The long teeth are three, and are arranged in a regular triangle on the cross section of the thread number tube.

5. A leader tube characterized by, The inner surface of the thread number tube is distributed with at least three elastically flexible inner teeth; The long teeth are at least one in each of the equalized central angle range of the inner surface of the thread number tube, and the equalized central angle range is at least three.

6. The wire marker of claim 5, wherein, The thread number tube is made of PVC.

7. The wire marker of claim 5, wherein, The long teeth are three, and are arranged in a regular triangle on the cross section of the thread number tube.

8. A mandrel, dedicated to the manufacture of the tubular of any one of claims 1-7, characterized in that, The outer surface of the core rod is provided with at least three deep grooves parallel to the axial direction; The deep grooves are used for forming the long teeth or the flexible inner teeth; The deep grooves are at least one in the equalized central angle range of the outer surface of the core rod.

9. A mandrel as claimed in claim 8, wherein The outer surface is provided with several shallow grooves parallel to the axial direction.

10. The mandrel of claim 8 wherein, The material of the core rod is aluminum.

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