Die for preventing optical cable sheath from being bonded with cable core
By designing a mold to prevent the optical cable sheath from sticking to the cable core, and using guide tubes and wire guide rings to achieve stable guidance of the cable core and uniform distribution of aramid yarn, the problem of optical cable sheath sticking to the cable core is solved, and the installation efficiency of optical cable is improved.
Patent Information
- Application Number
- CN202520317201.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-26
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-02-26
AI Technical Summary
The optical cable sheath and core are prone to sticking together during the manufacturing process, which makes installation difficult and affects work efficiency.
A mold was designed to prevent the optical cable sheath from sticking to the cable core. It includes a fixing slot frame, a mold sleeve, a mold core, a guide tube, and a wire guide ring. The cable core is guided by the guide tube, and the wire guide ring evenly distributes aramid yarn to prevent the cable core from sagging and ensure effective isolation between the sheath and the cable core.
It effectively prevents the optical cable sheath from sticking to the cable core, thus improving the efficiency of optical cable installation.
Smart Images
Figure CN223790980U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an optical cable mold, and more particularly to a mold for preventing the optical cable sheath from sticking to the cable core. Background Technology
[0002] The structure of indoor optical cables is as follows Figure 3 As shown: Four optical fibers 8 surround the central reinforcing member 7 to form the cable core. The cable core is then covered from the inside out with aramid yarn 10 and an outer sheath 11. However, although aramid yarn exists between the cable core and the sheath, it cannot completely cover the cable core. This is because the cable core's own weight causes uneven aramid yarn distribution during manufacturing. In this case, adhesion between the cable core and the outer sheath is very likely to occur, especially if the outer layer of the cable core and the sheath are made of the same material. Adhesion between the cable core and the sheath makes subsequent sheath removal difficult, affecting installation efficiency. Utility Model Content
[0003] The purpose of this invention is to overcome the shortcomings of the above-mentioned background technology and provide a mold for preventing the optical cable sheath from sticking to the cable core, so as to effectively solve the problem of the optical cable sheath sticking to the cable core.
[0004] The technical solution provided by this utility model is:
[0005] A mold for preventing optical cable sheath from sticking to the cable core includes a tubular fixed slot frame horizontally mounted on a frame, and a mold sleeve and a mold core coaxially inserted and fixed in the inner cavity of the fixed slot frame, each having a through groove. The mold sleeve is fixed to the right side of the inner cavity of the fixed slot frame, and its through groove is a tapered groove that runs from left to right. The right half of the mold core extends into the tapered groove of the mold sleeve, and its outer wall forms a channel between the outer wall and the groove wall of the tapered groove to facilitate the flow of molten material. The through groove of the mold core runs from left to right to guide the movement of the cable core.
[0006] Its features are:
[0007] A guide tube is coaxially arranged in the through groove of the core, and the inner cavity of the guide tube is used to guide the cable core.
[0008] A thread guide ring is coaxially fitted between the through groove of the mold core and the guide tube; the inner hole of the thread guide ring is inserted into the outer wall of the guide tube and multiple grooves are evenly distributed along the outer periphery of the thread guide ring, and the multiple grooves respectively penetrate the outer periphery of the thread guide ring for uniform distribution and guidance of aramid yarn.
[0009] A bracket is fixed to the left end of the fixed slot frame, and the top of the bracket is a ring that cooperates with the conduit to provide stable support for the conduit.
[0010] The conical groove is a conical groove that is larger on the left and smaller on the right; the outer wall of the right half of the mold core is a conical wall corresponding to the conical groove, and the right half of the through groove of the mold core is also a conical shape that is larger on the left and smaller on the right.
[0011] The distance between the right end of the guide tube and the tapered groove of the mold core is 1mm to 2mm to ensure that the aramid yarn passes through and to prevent the cable core from sagging.
[0012] The outer diameter of the right end of the conduit is at least 0.5 mm larger than the inner diameter of the mold core, so that the aramid fibers passing through can fit tightly against the inner wall of the conical groove of the mold core.
[0013] The thickness of the wire guide ring is 3mm to 5mm.
[0014] The conduit is a stainless steel tube.
[0015] The beneficial effects of this utility model are:
[0016] Because of the conduit, the cable core can pass smoothly through the core without sagging; and with the included wire guide ring, the aramid yarn can be evenly distributed and wrapped around the cable core, so that the extruded outer sheath can be effectively isolated from the outside of the cable core, thereby eliminating the adhesion between the optical cable sheath and the cable core, facilitating the installation of the optical cable, and improving the efficiency of the optical cable installation work. Attached Figure Description
[0017] Figure 1 This is a perspective view of an embodiment of the present utility model.
[0018] Figure 2 for Figure 1 A schematic diagram of the main structure of the wire clamp.
[0019] Figure 3 for Figure 1 A schematic diagram of the A-direction structure of the central support.
[0020] Figure 4 This is a schematic diagram of the front view structure of an existing optical cable mold.
[0021] Figure 5 This is a schematic diagram of the cross-sectional structure of an optical cable.
[0022] In the diagram: 1. Mold sleeve; 2. Mold core; 3. Cable guide ring; 3-1. Groove; 4. Conduit; 5. Fixing slot frame; 5-1. Sheath material inlet; 6. Support; 7. Central reinforcement; 8. Optical fiber; 9. Optical fiber protective layer; 10. Aramid yarn; 11. Optical cable outer sheath. Detailed Implementation
[0023] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.
[0024] Figure 1The mold shown for preventing the optical cable sheath from sticking to the cable core includes a tubular fixed slot frame 5 horizontally mounted on a frame (the frame is omitted in the figure) and a mold sleeve 1 and a mold core 2 coaxially inserted and fixed in the inner cavity of the fixed slot frame, each having a through groove. The mold sleeve is fixed to the right side of the inner cavity of the fixed slot frame, and its through groove is a tapered groove that runs from left to right. The through groove of the mold core runs from left to right to guide the movement of the cable core. The right half of the mold core extends into the tapered groove of the mold sleeve, and the outer wall of the mold core forms a channel between the outer wall and the wall of the tapered groove to facilitate the flow of molten material. The right end of the channel is the outlet of the optical cable sheath material, and the left end of the channel is connected to the optical cable sheath material inlet 5-1. Several optical cable sheath material inlets are provided through the inner and outer walls of the fixed slot frame, so that the heated and molten optical cable sheath material can be extruded onto the outside of the cable core through the channel between the mold core and the mold sleeve.
[0025] Obviously, this is related to Figure 4 The mold shown is similar to a conventional mold.
[0026] The improvement of this utility model is:
[0027] First, a guide tube 4 is coaxially arranged in the through groove of the core, and the inner cavity of the guide tube is used for guiding the cable core.
[0028] Secondly, a circular thread guide ring 3 is coaxially embedded between the through groove of the mold core and the guide tube; the inner hole of the thread guide ring is adapted to the outer wall of the guide tube, so that they can be inserted and fitted together; the outer circumferential edge of the thread guide ring is in contact with the groove wall of the through groove of the mold core, so that vertical fixation can be achieved; multiple grooves 3-1 are also evenly distributed on the outer circumferential edge of the thread guide ring, and the multiple grooves respectively penetrate the outer circumferential edge of the thread guide ring, which can be used for the uniform distribution and guidance of multi-strand aramid yarn 10.
[0029] The left end of the fixed slot is fixed with a bracket 6 (preferably by bolts). The top of the bracket is a ring, which is inserted into the conduit to provide stable support for the conduit.
[0030] The conical groove is a conical groove that is larger on the left and smaller on the right; the outer wall of the right half of the mold core is a conical wall corresponding to the conical groove, and the right half of the through groove of the mold core is also a conical shape that is larger on the left and smaller on the right.
[0031] Preferably, the distance between the right end of the conduit and the tapered groove of the mold core is 1mm to 2mm, which can ensure the passage of aramid yarn and prevent the cable core from sagging; the left end of the conduit extends to the outside of the mold to facilitate the installation and adjustment of the wire clamp and the conduit.
[0032] Preferably, the outer diameter of the right end of the conduit is at least 0.5 mm larger than the inner diameter of the mold core, so that the aramid fibers passing through can fit tightly against the inner wall of the conical groove of the mold core.
[0033] Preferably, the thickness of the wire guide ring is 3mm to 5mm, so that it can be locked in the mold core without shaking.
[0034] Preferably, the conduit is a stainless steel tube.
[0035] The working principle of this utility model is as follows:
[0036] During operation, the cable core enters the guide tube from left to right, while the multi-strand aramid yarn enters the space between the guide tube and the mold core from left to right. After being evenly dispersed, the yarn passes through multiple grooves along the outer periphery of the wire clamp ring and then evenly covers the outside of the cable core. The yarn is then output from the outlet to the right along with the cable core. At the same time, the molten optical cable sheath material, heated externally, is fed into the sheath material inlet 5-1 and then extruded onto the outside of the cable core through the channel between the mold core and the mold sleeve to form the optical cable sheath. The formed optical cable is output from the mold outlet and is shaped through the next cooling process (water tank cooling).
Claims
1. A mold for preventing optical cable sheath from sticking to the cable core, comprising a tubular fixed slot frame (5) mounted horizontally on a frame, and a mold sleeve (1) and a mold core (2) coaxially inserted and fixed in the inner cavity of the fixed slot frame and respectively provided with through slots, wherein the mold sleeve is fixed in the right part of the inner cavity of the fixed slot frame and its through slot is a tapered slot that runs through the left and right sides; the right half of the mold core extends into the tapered slot of the mold sleeve and the outer wall of the mold core forms a channel between the outer wall of the mold core and the wall of the tapered slot to facilitate the flow of molten material, and the through slot of the mold core runs through the left and right sides to serve as a guide for the movement of the cable core; Its features are: A guide tube (4) is coaxially arranged in the through groove of the core, and the inner cavity of the guide tube is used for guiding the cable core. The through groove of the mold core is coaxially fitted with a thread retainer (3) between it and the guide tube; the inner hole of the thread retainer is inserted into the outer wall of the guide tube and a plurality of grooves (3-1) are evenly distributed along the outer periphery of the thread retainer. The plurality of grooves pass through the outer periphery of the thread retainer for the uniform distribution and guidance of the aramid yarn (10).
2. The mold for preventing the optical cable sheath from sticking to the cable core according to claim 1, characterized in that: The left end of the fixed slot is fixed with a bracket (6), and the top of the bracket is a ring that cooperates with the conduit to provide stable support for the conduit.
3. The mold for preventing the optical cable sheath from sticking to the cable core according to claim 2, characterized in that: The conical groove is a conical groove that is larger on the left and smaller on the right; the outer wall of the right half of the mold core is a conical wall corresponding to the conical groove, and the right half of the through groove of the mold core is also a conical shape that is larger on the left and smaller on the right.
4. The mold for preventing the optical cable sheath from sticking to the cable core according to claim 3, characterized in that: The distance between the right end of the guide tube and the tapered groove of the mold core is 1mm to 2mm to ensure that the aramid yarn passes through and to prevent the cable core from sagging.
5. The mold for preventing the optical cable sheath from sticking to the cable core according to claim 4, characterized in that: The outer diameter of the right end of the conduit is at least 0.5 mm larger than the inner diameter of the mold core, so that the aramid fibers passing through can fit tightly against the inner wall of the conical groove of the mold core.
6. The mold for preventing the optical cable sheath from sticking to the cable core according to claim 5, characterized in that: The thickness of the wire guide ring is 3mm to 5mm.
7. The mold for preventing the optical cable sheath from sticking to the cable core according to claim 6, characterized in that: The conduit is a stainless steel tube.