A flat optical cable forming mold

Abstract

The present invention relates to the field of optical cable manufacturing technology, and discloses a flat optical cable forming mold, including a mold core and a mold sleeve, the mold core includes a positioning part, a guide part and a matching part which are connected in sequence and coaxially arranged, the positioning part is provided with at least two first positioning holes, the guide part is an elliptical cone, the guide part is provided with a first elliptical through hole for a reinforcement member to pass through, the matching part is an elliptical column, the matching part is provided with a second elliptical through hole for an optical fiber to pass through. The mold sleeve is provided with at least two second positioning holes, the second positioning holes correspond to the first positioning holes one by one, and the second positioning holes are connected to the first positioning holes, the mold sleeve is provided with a tapered groove, the cross-sectional shape of the tapered groove is an elliptical shape, a flat through hole is provided on the bottom surface of the tapered groove, the guide part extends into the tapered groove, and the matching part extends into the flat through hole, and the outer surface of the guide part and the inner surface of the tapered groove form a first extrusion channel. The flat optical cable forming mold has high assembly efficiency and can prepare flat optical cables.

Description

Technical Field

[0001] The invention relates to the technical field of optical cable manufacturing, and in particular to a flat optical cable forming mold. Background Art

[0002] The bending resistance of round optical cables is worse than that of flat optical cables, and round optical cables are prone to twisting, which can easily damage the optical fibers inside the cables. In the production process of optical cables, an optical cable molding mold is required to fix the optical fibers and reinforcements, and to introduce materials for extrusion molding. The optical cable molding mold in the prior art is mainly used to process round optical cables. The optical cable molding mold includes a mold base, a mold core, and a mold sleeve. During installation, the relative positions of the mold core and the mold sleeve need to be adjusted so that the mold core and the mold sleeve are coaxial. Since the existing mold core is fixedly installed on the mold base, the mold sleeve can only be coaxially arranged with the mold core by adjusting the position of the mold sleeve. The debugging time is long and the assembly efficiency is low. Therefore, there is an urgent need for a flat optical cable molding mold to solve the above problems. Summary of the invention

[0003] The object of the present invention is to provide a flat optical cable forming die, which has high assembly efficiency and can prepare flat optical cables.

[0004] In order to achieve the above objectives, the following technical solutions are provided:

[0005] A flat optical cable forming mold, comprising:

[0006] The mold core comprises a positioning portion, a guide portion and a matching portion which are connected in sequence and arranged coaxially, the positioning portion is provided with at least two first positioning holes, the guide portion is in an elliptical cone shape, the guide portion is provided with a first elliptical through hole for the reinforcement member of the optical cable to pass through, the matching portion is in an elliptical column shape, the matching portion is provided with a second elliptical through hole for the optical fiber of the optical cable to pass through;

[0007] A mold sleeve is provided with at least two second positioning holes, the second positioning holes correspond to the first positioning holes one by one, and the second positioning holes are communicated with the first positioning holes, the mold sleeve is provided with a tapered groove, the cross-sectional shape of the tapered groove is elliptical, a flat through hole is provided on the bottom surface of the tapered groove, the guide portion extends into the tapered groove, and the matching portion extends into the flat through hole, the outer surface of the guide portion and the inner surface of the tapered groove form a first extrusion channel.

[0008] As a preferred solution of a flat optical cable forming mold, the flat optical cable forming mold also includes a mold base, a receiving cavity is provided on the mold base, at least two positioning blocks are provided on the inner wall of the receiving cavity, the mold core is provided in the receiving cavity, at least two positioning grooves are provided on the circumferential surface of the mold core, the positioning grooves correspond one-to-one to the positioning blocks, and the positioning blocks can be clamped in the positioning grooves.

[0009] As a preferred solution of the flat optical cable forming mold, the number of the positioning grooves is four, and the four positioning grooves are evenly arranged along the circumference of the positioning portion.

[0010] As a preferred embodiment of a flat optical cable forming mold, the flat optical cable forming mold also includes a sealing cone, a conical hole is provided on the positioning portion, the sealing cone extends into the accommodating cavity, and the end of the sealing cone abuts against the inner surface of the conical hole, the outer surface of the sealing cone and the inner surface of the accommodating cavity form a second extrusion channel, and the second extrusion channel is connected to the first extrusion channel.

[0011] As a preferred solution of the flat optical cable forming mold, the end of the sealing cone is conical, and the outer surface of the end is in contact with the inner surface of the conical hole.

[0012] As a preferred solution of the flat optical cable forming mold, the two first elliptical through holes are symmetrically arranged on both sides of the matching portion.

[0013] As a preferred solution of the flat optical cable forming mold, the mold sleeve is in the shape of an elliptical cylinder, and the end surface of the matching portion is flush with the end surface of the mold sleeve.

[0014] As a preferred solution of a flat optical cable forming mold, the flat optical cable forming mold further comprises a gasket, wherein the gasket is arranged between the mold core and the mold sleeve, and the thickness of the gasket is 1.5 mm-4.5 mm.

[0015] As a preferred solution of the flat optical cable forming mold, the length of the matching portion is 2mm-5mm.

[0016] As a preferred solution of a flat optical cable forming mold, the mold core is an integrally formed structure; and / or the mold sleeve is an integrally formed structure.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The flat optical cable forming mold provided by the present invention can realize the coaxiality of the mold core and the mold sleeve, ensure the concentricity of the mold core and the mold sleeve, and improve the assembly efficiency of the mold core and the mold sleeve by setting at least two first positioning holes on the mold core and setting at least two second positioning holes on the mold sleeve, and the positioning pin passes through the first positioning hole and the second positioning hole to fix the mold core and the mold sleeve. In addition, by setting the first elliptical through hole and the second elliptical through hole on the mold core, and setting a flat through hole on the mold sleeve, and then by cooperating with the mold core and the mold sleeve, it is possible to process a flat optical cable and improve the bending resistance of the optical cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0020] Figure 1 A schematic diagram of assembling a mold core and a mold sleeve provided in an embodiment of the present invention;

[0021] Figure 2 A cross-sectional view of a mold sleeve provided by an embodiment of the present invention;

[0022] Figure 3 A front view of a mold sleeve provided by an embodiment of the present invention;

[0023] Figure 4 A cross-sectional view of a mold core provided by an embodiment of the present invention;

[0024] Figure 5 A front view of a mold core provided by an embodiment of the present invention;

[0025] Figure 6 A schematic diagram of the assembly of a flat optical cable forming die and an extruder provided in an embodiment of the present invention.

[0026] Reference numerals:

[0027] 1-mold core; 11-positioning portion; 111-first positioning hole; 112-positioning groove; 113-conical hole; 12-guide portion; 121-first elliptical through hole; 13-matching portion; 131-second elliptical through hole;

[0028] 2-mold sleeve; 21-second positioning hole; 22-conical groove; 23-flat through hole;

[0029] 3-Mold base;

[0030] 4-Sealing cone;

[0031] 5- Gasket;

[0032] 6- Extruder;

[0033] 7-Location pin. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0035] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product is usually placed when in use, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, or to distinguish different structures or components, and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] like Figure 1-Figure 5 As shown, this embodiment provides a flat optical cable forming mold, including a mold core 1 and a mold sleeve 2, the mold core 1 includes a positioning portion 11, a guide portion 12 and a matching portion 13 which are connected in sequence and coaxially arranged, the positioning portion 11 is provided with at least two first positioning holes 111, the guide portion 12 is an elliptical cone, and the guide portion 12 is provided with a first elliptical through hole 121 for the reinforcement of the optical cable to pass through, the matching portion 13 is an elliptical cylinder, and the matching portion 13 is provided with a second elliptical through hole 131 for the optical fiber of the optical cable to pass through. At least two second positioning holes 21 are provided on the die sleeve 2, and the second positioning holes 21 correspond to the first positioning holes 111 one by one, and the second positioning holes 21 are connected to the first positioning holes 111. A conical groove 22 is provided on the die sleeve 2, and the cross-sectional shape of the conical groove 22 is elliptical. A flat through hole 23 is provided on the bottom surface of the conical groove 22. The guide portion 12 extends into the conical groove 22, and the matching portion 13 extends into the flat through hole 23. The outer surface of the guide portion 12 and the inner surface of the conical groove 22 form a first extrusion channel.

[0038] The flat optical cable forming mold provided in this embodiment, by setting at least two first positioning holes 111 on the mold core 1 and at least two second positioning holes 21 on the mold sleeve 2, the positioning pin 7 passes through the first positioning hole 111 and the second positioning hole 21 to fix the mold core 1 and the mold sleeve 2 to connect, which can not only realize the coaxiality of the mold core 1 and the mold sleeve 2, ensure the concentricity of the mold core 1 and the mold sleeve 2, but also improve the assembly efficiency of the mold core 1 and the mold sleeve 2. In addition, by setting the first elliptical through hole 121 and the second elliptical through hole 131 on the mold core 1, and setting the flat through hole 23 on the mold sleeve 2, and then by the cooperation of the mold core 1 and the mold sleeve 2, it is possible to process a flat optical cable and improve the bending resistance of the optical cable.

[0039] Preferably, if Figure 1 As shown, in order to maintain the space size of the first extrusion channel and ensure the distance between the mold core 1 and the mold sleeve 2, the flat optical cable forming mold also includes a gasket 5, which is arranged between the mold core 1 and the mold sleeve 2, and the thickness of the gasket 5 is 1.5mm-4.5mm. Exemplarily, in this embodiment, the thickness of the gasket 5 is 3mm, and the 3mm thin gasket 5 can effectively avoid the occurrence of unqualified products due to overload of the extrusion die pressure; fully ensure that the product structure and performance meet customer requirements.

[0040] Furthermore, the length of the fitting portion 13 is 2 mm-5 mm, so that after the mold core 1 and the mold sleeve 2 are assembled, with the support of the gasket 5, the end of the fitting portion 13 can be flush with the end of the mold sleeve 2 to ensure the outer surface quality of the flat optical cable.

[0041] Preferably, if Figure 2-Figure 3 As shown, the mold sleeve 2 is elliptical, so that the mold sleeve 2 and the mold core 1 can be assembled. In addition, the end surface of the matching portion 13 is flush with the end surface of the mold sleeve 2, which can make the outer surface of the molded optical cable smooth and ensure the outer surface quality of the molded optical cable.

[0042] For example, Figure 4-Figure 5 As shown, two first elliptical through holes 121 are symmetrically arranged on both sides of the matching portion 13, so as to realize the arrangement of two reinforcement members in the flat optical cable and improve the tensile performance of the flat optical cable.

[0043] Preferably, if Figure 5 As shown in Figure 6, the flat optical cable forming mold also includes a mold base 3, a receiving cavity is provided on the mold base 3, at least two positioning blocks (not shown in the figure) are provided on the inner wall of the receiving cavity, the mold core 1 is provided in the receiving cavity, at least two positioning grooves 112 are provided on the circumferential surface of the mold core 1, the positioning grooves 112 correspond to the positioning blocks one by one, and the positioning blocks can be clamped in the positioning grooves 112. Through the cooperation of the positioning blocks on the mold base 3 and the positioning grooves 112 on the mold core 1, the mold core 1 can be prevented from moving under the action of the extruded plastic, the concentricity of the mold core 1 and the mold sleeve 2 is ensured, and the quality of the optical cable is improved.

[0044] Furthermore, if Figure 5 As shown, there are four positioning grooves 112, and the four positioning grooves 112 are evenly arranged along the circumference of the positioning portion 11. The four positioning grooves 112 can realize the positioning of the mold core 1. In other embodiments, the number of the positioning grooves 112 can also be five, six, seven, or eight, which can be designed according to specific needs.

[0045] Preferably, if Figure 6 As shown, the flat optical cable forming mold also includes a sealing cone 4, a conical hole 113 is provided on the positioning portion 11, the sealing cone 4 extends into the accommodating cavity, and the end of the sealing cone 4 abuts against the inner surface of the conical hole 113, the outer surface of the sealing cone 4 and the inner surface of the accommodating cavity form a second extrusion channel, and the second extrusion channel is connected to the first extrusion channel.

[0046] Exemplarily, the second extrusion channel is connected to the discharge port of the extruder 6, and the extruder 6 injects the molten material into the second extrusion channel. The material enters the first extrusion channel from the second extrusion channel, and then is extruded from between the outer surface of the mating part 13 and the inner wall of the flat through hole 23 to form a flat optical cable outer sheath.

[0047] In short, a hollow tube with an optical fiber is inserted into the second elliptical through hole 131, and a reinforcement member of the optical cable is inserted into the first elliptical through hole 121. Then, a flat outer sheath is formed on the outer surface of the hollow tube and the reinforcement member by cooperating with the mold core 1 and the mold sleeve 2, thereby completing the manufacture of the flat optical cable.

[0048] Furthermore, if Figure 6 As shown, the end of the sealing cone 4 is conical, and the outer surface of the end is fitted with the inner surface of the conical hole 113. The end of the sealing cone 4 is set to be conical so that the end of the sealing cone 4 is closely fitted with the inner surface of the conical hole 113 of the positioning part 11 to prevent the extruded plastic from overflowing from the sealing cone 4 and the positioning part 11.

[0049] In addition, the diameter of the extrusion screw in the extruder 6 used in this embodiment is 45mm, hereinafter referred to as 45# extruder, which can fully ensure that the amount of extruded glue is relatively uniform. By using the 45# extruder and the mold core 1 and mold sleeve 2 provided in this embodiment, as well as the 3mm gasket 5, it can ensure that the reinforcement and the outer sheath material are more compactly adhered, and the maximum peak value of the extraction force is 525N, which avoids the relative displacement of the reinforcement and the outer sheath in the optical cable. In addition, the appearance of the processed optical cable is flat, which meets customer requirements and is in the shape of a standard runway, that is, flat; at the same time, the structural dimensions also meet customer requirements; the appearance is smooth and uniform; the mechanical properties and attenuation indicators of the product meet customer requirements.

[0050] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A flat optical cable forming mold, characterized in that: include: A mold core (1) comprises a positioning portion (11), a guide portion (12) and a matching portion (13) which are connected in sequence and arranged coaxially, the positioning portion (11) being provided with at least two first positioning holes (111), the guide portion (12) being in the shape of an elliptical cone, the guide portion (12) being provided with a first elliptical through hole (121) for a reinforcement member of an optical cable to pass through, the matching portion (13) being in the shape of an elliptical column, the matching portion (13) being provided with a second elliptical through hole (131) for an optical fiber of the optical cable to pass through; A die sleeve (2) is provided with at least two second positioning holes (21), the second positioning holes (21) correspond to the first positioning holes (111) one by one, and the second positioning holes (21) are connected to the first positioning holes (111), the die sleeve (2) is provided with a tapered groove (22), the cross-sectional shape of the tapered groove (22) is elliptical, a flat through hole (23) is provided on the bottom surface of the tapered groove (22), the guide portion (12) extends into the tapered groove (22), and the matching portion (13) extends into the flat through hole (23), and the outer surface of the guide portion (12) and the inner surface of the tapered groove (22) form a first extrusion channel; A positioning pin (7) passes through the first positioning hole (111) and the second positioning hole (21) to fix the mold core (1) and the mold sleeve (2) in connection; The flat optical cable forming mold further comprises a mold base (3), the mold base (3) being provided with a receiving cavity, the inner wall of the receiving cavity being provided with at least two positioning blocks, the mold core (1) being provided in the receiving cavity, the peripheral surface of the mold core (1) being provided with at least two positioning grooves (112), the positioning grooves (112) corresponding to the positioning blocks one by one, and the positioning blocks being capable of being clamped in the positioning grooves (112); The flat optical cable forming mold further comprises a sealing cone (4), the positioning portion (11) is provided with a tapered hole (113), the sealing cone (4) extends into the accommodating cavity, and the end of the sealing cone (4) abuts against the inner surface of the tapered hole (113), the outer surface of the sealing cone (4) and the inner surface of the accommodating cavity form a second extrusion channel, and the second extrusion channel is connected to the first extrusion channel; The two first elliptical through holes (121) are symmetrically arranged on both sides of the matching portion (13).

2. The flat optical cable forming mold according to claim 1, characterized in that: The number of the positioning grooves (112) is four, and the four positioning grooves (112) are evenly arranged along the circumference of the positioning portion (11).

3. The flat optical cable forming mold according to claim 1, characterized in that: The end of the sealing cone (4) is conical, and the outer surface of the end is in contact with the inner surface of the conical hole (113).

4. The flat optical cable forming mold according to any one of claims 1 to 3, characterized in that: The mold sleeve (2) is in the shape of an elliptical column, and the end surface of the matching portion (13) is flush with the end surface of the mold sleeve (2).

5. The flat optical cable forming mold according to any one of claims 1 to 3, characterized in that: The flat optical cable forming mold further comprises a gasket (5), wherein the gasket (5) is arranged between the mold core (1) and the mold sleeve (2), and the thickness of the gasket (5) is 1.5 mm-4.5 mm.

6. The flat optical cable forming mold according to claim 5, characterized in that: The length of the matching portion (13) is 2 mm-5 mm.

7. The flat optical cable forming mold according to claim 1, characterized in that: The mold core (1) is an integrally molded structure; and / or the mold sleeve (2) is an integrally molded structure.

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