CN107399068B - A self-supporting aerial wiring introduction optical fiber ribbon cable forming mold - Google Patents

Abstract

The invention provides a self-supporting aerial wiring lead-in optical fiber ribbon optical cable forming die, which comprises an inner die and an outer die, wherein the outer die is sleeved outside the inner die, the inner die comprises an inner die cylinder part and an inner die frustum part connected with the inner die cylinder part, and the middle part of the inner die is of a cavity structure; the top end of the inner die frustum part is sequentially provided with a bearing steel wire hole, a first steel wire hole, an optical fiber hole and a second steel wire hole; the end part of the inner die frustum part is also provided with a C-shaped cavity forming body protruding out of the top end surface; the inner part of the outer mold is a conical cavity, and the inner wall of the outer mold is separated from the outer wall of the inner mold; the C-shaped cavity forming body is propped against the top of the inner cavity of the outer mold; the top of the outer die is provided with a bearing part forming opening and an optical cable main body forming opening; the invention makes up the blank of the production mould of the self-supporting cable; the structure is simple, the molding effect is good, and the optical cable structure with uniform outer surface can be rapidly extruded and molded; the forming die has high production efficiency and high quality uniformity of the formed optical cable.

Description

A self-supporting aerial wiring introduction optical fiber ribbon cable forming mold

Technical field

The invention belongs to the field of optical cable manufacturing, and in particular relates to a self-supporting aerial wiring introduction optical fiber ribbon cable forming mold.

Background technique

With the development of optical fiber technology, optical cables are also widely used in various information transmission fields. However, existing optical cables mainly do not have a self-supporting structure. After being laid aerially, this kind of optical cable mainly relies on the thin steel wires in the optical cable for strength support. This kind of optical cable structure is easily affected by the natural environment and has poor structural strength. Therefore, self-supporting optical cables have become a trend in the development of optical cable technology. However, there is still a lack of manufacturing of self-supporting optical cables in the existing technology. For this reason, it is very necessary to develop a mold suitable for self-supporting optical cables.

Contents of the invention

In view of this, the present invention aims to propose a self-supporting aerial wiring introduction optical fiber ribbon cable forming mold to produce self-supporting optical cables and fill the gap in the production technology of self-supporting optical cables. At the same time, the designed mold has high reliability. It can be accurately formed, with high production efficiency and good quality.

In order to achieve the above objects, the technical solution of the present invention is implemented as follows:

A self-supporting aerial wiring introduction optical fiber ribbon cable forming mold includes an inner mold and an outer mold. The outer mold is set outside the inner mold. The inner mold includes a cylinder part of the inner mold and a frustum part of the inner mold connected thereto. The middle part of the inner mold is a cavity structure; the top of the inner mold frustum is provided with a load-bearing steel wire hole, a first steel wire hole, an optical fiber hole and a second steel wire hole in sequence; there is also a protruding top surface at the end of the inner mold frustum The C-shaped cavity molding body is used to form the C-shaped cavity on the optical cable; the load-bearing steel wire hole is used to pass through the load-bearing steel wire, and the first steel wire hole and the second steel wire hole are used to pass through the first steel wire and the second steel wire respectively, The optical fiber hole is used to pass through the optical fiber; there is a tapered cavity inside the outer mold, the inner wall of the outer mold is separated from the outer wall of the inner mold, and the separated space is the flow channel for the protective layer of molten material; the C-shaped cavity molding body is connected to the top of the inner cavity of the outer mold ; There is a load-bearing part forming opening and an optical cable main body forming opening at the top of the outer mold; the load-bearing part forming opening is used for the load-bearing steel wire covered by the protective layer; the optical cable main body forming opening is used for the first steel wire and the second steel wire covered by the protective layer and optical fiber;

Preferably, the C-shaped cavity molding body includes a first C-shaped hole mold and a second C-shaped hole mold, and the two hole molds are respectively used to form the C-shaped cavity at the first steel wire and the C-shaped cavity at the second steel wire on the optical cable. ;The C-shaped cavity facilitates the stripping of the protective layer of the optical cable;

Preferably, the C-shaped cavity molding body further includes a connecting plate mold, which connects the first C-shaped hole mold and the second C-shaped hole mold to form a closed rectangular frame or circular frame or other shaped frame. The frame or circular frame or other shaped frame matches the fiber hole and is used to pass through the optical fiber. The frame structure can effectively prevent the molten material of the protective layer from melting between the optical fibers, causing adhesion between the optical fiber and the light;

Wherein, the first C-shaped hole mold and the second C-shaped hole mold both include the opening end of the C-shaped hole mold, the middle part of the C-shaped hole mold and the valley bottom of the C-shaped hole mold. The outsides of the valley bottoms of the two C-shaped hole molds are respectively connected to Connect the two opposite ends of the plate mold, with the opening ends of the two C-shaped hole molds facing outwards respectively; the tearing opening forming part is opposite to the middle part of the C-shaped hole mold, so as to ensure that the tearing opening on the produced optical cable is opposite to the C-shaped cavity , which facilitates the accurate insertion of the peeling tool into the C-cavity;

Preferably, a flow diversion gap is provided on the cone part of the inner mold, that is, a piece of the cone part of the inner mold is cut off to form a flow diversion gap, and the flow diversion gap facilitates the inflow of the molten material of the protective layer;

Preferably, the outer wall of the inner mold cylinder has a positioning groove for accurately aligning the inner mold hole and the outer mold hole; it also facilitates the installation of the inner mold;

Preferably, a pair of tear opening forming parts is provided in the optical cable body forming opening at the top of the outer mold; the tear opening forming part is used to form a tearing opening outside the protective layer, and the tearing opening facilitates the positioning and peeling of the stripper;

Preferably, a connection constriction part with a narrowed size is provided between the load-bearing part forming opening and the optical cable main body forming opening. The connection constriction part is used to form the shape of the protective layer connection part on the optical cable. The connection constriction part is arranged very Reduces the use of protective layer molten material to a great extent and reduces the production cost of optical cables;

Preferably, the diameter of the load-bearing steel wire hole is 1.3-1.6mm. It is preferred that when the material of the load-bearing steel wire is 1.2mm, the load-bearing steel wire hole should be 1.4mm; that is, the diameter of the load-bearing steel wire hole should be 0.2-0.3mm larger than the load-bearing steel wire according to actual needs;

Preferably, the first steel wire hole and the second steel wire hole are of equal diameter, and the range is 0.5-0.8mm; when the diameter of the first steel wire and the second steel wire is selected to be 0.5mm, the corresponding steel wire hole diameter is selected to be 0.6mm; the steel wire can be selected according to actual needs The hole diameter is 0.1-0.2mm larger than the steel wire diameter;

Preferably, when the connecting plate mold is arranged in a rectangular shape, its length range is 1.1-1.3mm and its width range is 0.55-0.6mm. The gap between the connecting plate mold and the optical fiber can also be controlled according to the actual number of optical fibers passing through the fiber hole. 0.1-0.15mm;

Compared with the existing technology, the self-supporting aerial wiring introduction optical fiber ribbon cable forming mold of the present invention has the following advantages:

(1) This invention fills the gap in the production mold of self-supporting cables; it has a simple structure, good molding effect, and can quickly extrude an optical cable structure with a uniform outer surface; the molding mold has high production efficiency, and the quality of the formed optical cable is uniform high;

(2) The invention is reasonably designed and easy to use, and can realize the production of self-supporting optical cables, making up for the manufacturing and production of self-supporting optical cables. At the same time, the reasonable structure greatly reduces the melting of the protective layer when producing self-supporting optical cables. The use of materials saves costs. The protruding C-shaped cavity molding body avoids the dispersion of molten material between the optical fibers and causes the stickiness between the optical fibers, and facilitates the peeling off of the outer protective layer of the optical fibers; the setting of the tear opening molding part also facilitates identification. Tear position to improve tearing efficiency.

Description of the drawings

The drawings forming a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached picture:

Figure 1 is a perspective view of the internal mold according to the embodiment of the present invention;

Figure 2 is a front view of the internal mold according to the embodiment of the present invention;

Figure 3 is a cross-sectional view of the inner mold according to the embodiment of the present invention;

Figure 4 is a C-formed body according to an embodiment of the present invention;

Figure 5 is a perspective view of the outer mold according to the embodiment of the present invention;

Figure 6 is a sectional view of the outer mold according to the embodiment of the present invention;

Figure 7 is a schematic diagram of an optical cable according to an embodiment of the present invention;

Explanation of reference symbols:

1-inner mold; 10-cylindrical part of the inner mold; 11-positioning groove; 20-truncated cone part of the inner mold; 21-diversion gap; 30-load-bearing steel wire hole; 31-first steel wire hole; 32-second steel wire hole; 33-fiber hole; 40-C-shaped cavity molding body; 41-first C-shaped hole mold; 42-second C-shaped hole mold; 411-C-shaped hole mold opening end; 412-C-shaped hole mold middle part ; 413-C-shaped hole mold valley bottom; 43-connecting plate mold; 5-outer mold; 50-inner wall of the outer mold; 500-tear opening forming part; 530-load-bearing part forming opening; 531-connecting shrinkage part; 532 - Optical cable body forming opening; 6-optical cable; 60-load-bearing steel wire; 61-first steel wire; 62-second steel wire; 63-C cavity; 64-optical fiber; 65-protective layer; 66-protective layer connection part; 67 -Tear opening.

Detailed ways

It should be noted that, as long as there is no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and The simplified description is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms “first”, “second”, etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Thus, features defined by "first," "second," etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

As shown in Figures 1, 3, 5, 6 and 7, a self-supporting aerial wiring introduction optical fiber ribbon cable forming mold includes an inner mold 1 and an outer mold 5. The outer mold 5 is set outside the inner mold 1 and inside The mold 1 includes an inner mold cylinder part 10 and an inner mold frustum part 20 connected thereto. The middle part of the inner mold 1 is a cavity structure; the top of the inner mold frustum part 20 is successively provided with a load-bearing steel wire hole 30 and a first steel wire. hole 31, optical fiber hole 33 and second steel wire hole 32; the end of the inner mold frustum 20 is also provided with a C-shaped cavity molding body 40 protruding from the top surface, used to form the C-shaped cavity 63 on the optical cable 6; among which the load-bearing The steel wire hole 30 is used to pass through the load-bearing steel wire 60, the first steel wire hole 31 and the second steel wire hole 32 are used to pass through the first steel wire 61 and the second steel wire 62 respectively, and the optical fiber hole 33 is used to pass through the optical fiber 64; the outer mold 5 The inside is a tapered cavity, and the inner wall 50 of the outer mold is separated from the outer wall of the inner mold 1. The separated space is the flow channel for the molten material of the protective layer; the C-shaped cavity molding body 40 is connected to the top of the inner cavity of the outer mold 5; an opening is opened at the top of the outer mold 5 There is a load-bearing part forming opening 530 and an optical cable body forming opening 532; the load-bearing part forming opening 530 is used for the load-bearing steel wire covered by the protective layer; the optical cable main body forming opening 532 is used for the first steel wire, the second steel wire and the optical cable body forming opening 532 covered by the protective layer. Optical fiber; wherein, a flow guide gap 21 is provided on the inner mold frustum part 20, that is, a piece of the inner mold frustum part 20 is cut off to form a flow guide gap 21, and the flow guide gap 21 facilitates the flow of molten material of the protective layer 65; wherein, There is a positioning groove 11 on the outer wall of the inner mold cylinder 10 for precise alignment of the inner mold hole and the outer mold hole; it also facilitates the installation of the inner mold; among them, the optical cable body forming opening 532 on the top of the outer mold 5 is provided with There are pairs of tear opening forming parts 500; the tear opening forming part 500 is used to form the tear opening 67 outside the protective layer 65, and the tear opening 67 facilitates the positioning and peeling of the peeler;

As shown in FIG. 4 , the C-shaped cavity molding body 40 includes a first C-shaped hole mold 41 and a second C-shaped hole mold 42 . The two hole molds are respectively used to form the C-shaped hole at the first steel wire 61 on the optical cable 6 . The C-shaped cavity 63 at the cavity 63 and the second steel wire 62; the C-shaped cavity 63 facilitates the stripping of the protective layer of the optical cable; wherein, the C-shaped cavity molding body 40 also includes a connecting plate mold 43, which connects the first C-shaped hole The mold 41 is connected with the second C-shaped hole mold 42 to form a closed rectangular frame or a circular frame or a frame of other shapes. The rectangular frame or the circular frame or the frame of other shapes matches the optical fiber hole 33 for passing through it. Optical fiber 6, the frame structure can effectively prevent the molten material of the protective layer from melting between the optical fibers, causing stickiness between the optical fibers and the light;

As shown in FIG. 5 , a connection constriction portion 531 with a narrowed size is provided between the load-bearing portion forming opening 530 and the optical cable main body forming opening 532 . The connection constriction portion 531 is used to form the protective layer connection portion 66 on the optical cable 6 . shape, the setting of the connection shrinkage portion 531 greatly reduces the use of molten material for the protective layer and reduces the production cost of the optical cable;

Wherein, the first C-shaped hole mold 41 and the second C-shaped hole mold 42 both include a C-shaped hole mold opening end 411, a C-shaped hole mold middle part 412 and a C-shaped hole mold valley bottom 413. The two C-shaped hole mold valley bottoms The outside of 413 is connected to the two opposite ends of the connecting plate mold 43, and the opening ends 411 of the two C-shaped hole molds are respectively facing the outside; the tearing opening forming part 500 is opposite to the middle part 412 of the C-shaped hole mold, so as to ensure that the produced optical cable The tear opening 67 is opposite to the C-cavity 63, which facilitates the accurate insertion of the peeling tool into the C-cavity 63;

Among them, the aperture of the load-bearing steel wire hole 30 is 1.3-1.6mm. When the material of the load-bearing steel wire is 1.2mm, the load-bearing steel wire hole 30 is preferably 1.4mm; that is, the aperture of the load-bearing steel wire hole is 0.2-0.3mm larger than the load-bearing steel wire according to actual needs; Among them, the first steel wire hole 31 and the second steel wire hole 32 are of equal diameter, and the range is 0.5-0.8; when the diameter of the first steel wire and the second steel wire is selected to be 0.5mm, the corresponding steel wire hole diameter is selected to be 0.6mm; the steel wire can be selected according to actual needs. The hole diameter is 0.1mm-0.2mm larger than the diameter of the steel wire; among them, the gap distance range of the connection shrinkage portion 531 is 0.2-0.4mm, that is, a protective layer connection portion 66 with a thickness of 0.2-0.4mm is formed; this value range can ensure that the outside of the load-bearing steel wire The connection strength between the protective layer and the protective layer of the main part of the optical cable can also reduce the material cost of optical cable manufacturing;

As shown in Figure 2, the protruding height of the C-shaped cavity molding body 40 is 0.3-0.6mm, and 0.5mm is commonly used; when the connecting plate mold 43 is arranged in a rectangular shape, its length range is 1.1-1.3mm, and its width range is 0.55-0.6mm, or the gap between the connecting plate template 43 and the optical fiber can be controlled to 0.1-0.15mm according to the actual number of optical fibers passing through the optical fiber hole;

The invention is reasonably designed and easy to use, can realize the production of self-supporting optical cables, and makes up for the manufacturing and production of self-supporting optical cables. At the same time, the reasonable structure greatly reduces the use of molten material for the protective layer when producing self-supporting optical cables. , saving costs, the protruding C-shaped cavity molding body avoids the dispersion of molten material between the optical fibers and causes the adhesion between the optical fibers, and facilitates the peeling off of the outer protective layer of the optical fibers; the setting of the tear opening molding part also facilitates the identification of the tearing position. Improve tearing efficiency.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection.

Claims (10)

1. The self-supporting aerial wiring lead-in optical fiber ribbon optical cable forming die is characterized by comprising an inner die (1) and an outer die (5), wherein the outer die (5) is sleeved outside the inner die (1), the inner die (1) comprises an inner die cylinder part (10) and an inner die frustum part (20) connected with the inner die cylinder part, and the middle part of the inner die (1) is of a cavity structure; a bearing wire hole (30), a first wire hole (31), an optical fiber hole (33) and a second wire hole (32) are sequentially arranged at the top end of the inner die frustum portion (20); the end part of the inner die frustum part (20) is also provided with a C-shaped cavity forming body (40) protruding out of the top end surface; the inside of the outer mold (5) is a conical cavity, and the inner wall (50) of the outer mold is separated from the outer wall of the inner mold (1); the C-shaped cavity forming body (40) is propped against the top of the inner cavity of the outer mold (5); a bearing part forming opening (530) and an optical cable main body forming opening (532) are formed at the top of the outer mold (5).

2. The self-supporting aerial wiring drop fiber optic ribbon cable forming mold of claim 1, wherein the C-cavity forming body (40) comprises a first C-shaped hole die (41) and a second C-shaped hole die (42).

3. A self-supporting aerial wiring drop fiber optic ribbon cable forming die as in claim 2, wherein the C-cavity forming body (40) further comprises a connecting plate die (43), the connecting plate die (43) connecting the first C-shaped hole die (41) with the second C-shaped hole die (42) to form a closed frame that mates with the fiber optic hole (33).

4. A self-supporting aerial wiring lead-in fiber optic ribbon cable forming die as claimed in claim 1 wherein a diversion indentation (21) is provided on the inner die frustum portion (20).

5. A self-supporting aerial wiring lead-in optical fiber ribbon cable forming die as claimed in claim 1 wherein a locating groove (11) is provided in the outer wall of the inner die cylindrical portion (10).

6. A self-supporting air-wiring-introducing optical fiber ribbon cable forming mold according to claim 1, wherein a pair of tear-open forming portions (500) are provided in a cable body forming opening (532) at the top of the outer mold (5).

7. The self-supporting air-wire-guided optical fiber ribbon cable forming mold according to claim 6, wherein the first C-shaped hole mold (41) and the second C-shaped hole mold (42) each comprise a C-shaped hole mold opening end portion (411), a C-shaped hole mold middle portion (412) and a C-shaped hole mold valley bottom portion (413), the outer portions of the two C-shaped hole mold valley bottom portions (413) are respectively connected to the opposite end portions of the connecting plate mold (43), and the two C-shaped hole mold opening end portions (411) are respectively directed to the outside; the tear port forming portion (500) is opposite the C-shaped hole die middle portion (412).

8. The self-supporting air-wiring-introducing optical fiber ribbon cable molding die according to claim 1, wherein a connecting shrinkage portion (531) of a narrowed size is provided between the bearing portion forming port (530) and the cable main body forming port (532).

9. The self-supporting aerial wiring lead-in fiber optic ribbon cable forming die of claim 1 wherein the diameter of the load-bearing wire holes (30) is 1.3-1.6mm, the diameter of the load-bearing wire holes (30) being greater than 0.2-0.3mm of the load-bearing wires; the diameters of the first steel wire hole (31) and the second steel wire hole (32) are equal, and the range of the diameters is 0.5-0.8mm; the diameter of the two steel wires is 0.1-0.2mm larger than that of the two steel wires.

10. A self-supporting air-wiring-introducing optical fiber ribbon cable forming mold as claimed in claim 3, wherein the connecting plate mold (43) has a rectangular frame body with a length in the range of 1.1 to 1.3mm and a width in the range of 0.55 to 0.6mm.