Extrusion die

Abstract

The utility model discloses an extrusion die. The extrusion die comprises a die head; a branching plate for branching the fiber rope is arranged at one end of the mold machine head; a plurality of branching holes for allowing fiber ropes to penetrate through are formed in the branching plate; a main channel for a cable core to pass through is also formed in the die machine head; the branching holes are communicated with the main channel; a mold core is arranged at the other end of the mold machine head; a through hole for a cable core to pass through and a plurality of wire inlet holes for corresponding fiber ropes to pass through are formed in the mold core; a die sleeve is arranged on the side, away from the die machine head, of the die core. An injection channel for injecting plastic molten colloid is formed between the mold sleeve and the mold core; a molding cavity for a cable core, a fiber rope and a plastic molten colloid to enter is formed in the mold sleeve; the main channel, the wire inlet hole and the injection channel all communicate with the forming cavity. According to the extrusion die, a plurality of fiber ropes can be uniformly arranged in a sheath on the periphery of a cable structure, so that the structural strength of a sheath layer can be improved.

Description

Technical Field

[0001] The utility model relates to a forming die, in particular to an extrusion die used for cable manufacturing. Background Art

[0002] The cable usually has a corrugated aluminum sheath structure outside the insulating core, a semi-conductive buffer water-blocking tape is arranged between the corrugated aluminum sheath and the insulating core, and a plastic sheath is extruded outside the corrugated aluminum sheath. The extruded plastic sheath is usually a PVC sheath or a PE sheath. In such a structure, although the corrugated aluminum sheath has a certain compressive resistance, it does not have tensile properties. The strength of the plastic sheath is relatively low and does not have tensile resistance. When the corrugated aluminum sheath cable is bent, the plastic sheath is prone to deformation, and the vertical section of the cable end is prone to shrinkage and pulling off. The existing cable forming mold has a simple structure, which directly extrudes the sheath material and covers the outer periphery of the cable structure to form a layer of sheath. The sheath formed by this forming structure has the above-mentioned structural problems. Utility Model Content

[0003] The utility model provides an extrusion die to solve the above-mentioned technical problems, and specifically adopts the following technical solutions:

[0004] An extrusion die comprises: a die head; a dividing plate for dividing fiber ropes is provided at one end of the die head; a plurality of dividing holes for fiber ropes to pass through are formed on the dividing plate; a main channel for cable cores to pass through is also formed on the die head; the dividing holes are connected to the main channel; a die core is provided at the other end of the die head; the die core is formed with a through hole for cable cores to pass through and a plurality of inlet holes for corresponding fiber ropes to pass through respectively; a die sleeve is provided on the side of the die core away from the die head; an injection channel for injecting molten plastic is formed between the die sleeve and the die core; a molding cavity is formed on the die sleeve for cable cores, fiber ropes and molten plastic to enter; the main channel, the inlet holes and the injection channel are all connected to the molding cavity.

[0005] Furthermore, the mold head is also provided with an injection bucket for injecting the molten plastic colloid into the injection channel; the injection bucket is connected to the injection channel.

[0006] Furthermore, the injection channel is an injection cavity arranged around the outer circumference of the mold core; an annular groove is formed at the end of the mold sleeve for matching the shape of the end of the injection channel; the two ends of the annular groove are respectively connected to the injection channel and the molding cavity.

[0007] Furthermore, a cooling component for cooling and shaping the molten plastic colloid in the molding cavity is provided on the outer periphery of the mold sleeve.

[0008] Furthermore, a heat insulating portion is formed between the mold sleeve and the cooling assembly for preventing heat transfer between the injection channel and the cooling assembly.

[0009] Furthermore, the cooling assembly includes a shell fixed to the mold head by screws; a cooling cavity for circulating coolant is formed between the shell and the mold sleeve.

[0010] Furthermore, a seal for sealing the injection channel is provided in the installation gap between the mold sleeve and the mold head; the installation ends of the mold core and the mold head are respectively formed with sealing step portions for cooperating with each other to increase the sealing stroke and thus seal the injection channel.

[0011] Furthermore, the mold core has a plurality of arc-shaped protrusions evenly distributed on the hole wall of the perforation; the arc-shaped protrusions form dividing holes.

[0012] Furthermore, the inner diameter of the branching hole ranges from 4 mm to 6 mm.

[0013] Furthermore, the branching plate is formed with 6 branching holes; the 6 branching holes are evenly distributed along the circumference of the branching plate; the mold core is formed with 6 inlet holes; the 6 inlet holes are evenly distributed along the circumference of the mold core; the 6 inlet holes correspond to the 6 branching holes one by one.

[0014] The utility model is beneficial in that the provided extrusion die can evenly arrange a plurality of fiber ropes in the sheath on the outer periphery of the cable structure by arranging a branching plate and a wire entry hole, thereby improving the structural strength of the sheath layer, that is, combining the compressive resistance of the corrugated aluminum sheath to improve the overall tensile resistance of the cable. When the corrugated aluminum sheath cable is bent, the sheath layer is not easily deformed. By arranging a plurality of fiber ropes in the sheath layer through the extrusion die, the vertical section of the cable end is not easily contracted or pulled off, so that the structure of the formed cable is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 It is a schematic diagram of an extrusion die of the utility model;

[0017] Figure 2 yes Figure 1 A schematic diagram of a core of an extrusion die;

[0018] Extrusion die 10, die head 11, branching plate 12, branching hole 121, main channel 122, die core 13, through hole 131, wire inlet hole 132, arc-shaped protrusion 133, die sleeve 14, injection channel 141, molding cavity 142, annular groove (not shown), heat insulation part 143, injection bucket 15, cooling assembly 16, shell 161, cooling cavity (not shown), seal 17, sealing step 18. DETAILED DESCRIPTION

[0019] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0020] like Figure 1 to Figure 2 As shown, an extrusion die 10 of the present application includes: a die head 11, a line dividing plate 12 is provided at one end of the die head 11, and the line dividing plate 12 is formed with a plurality of line dividing holes 121 for fiber ropes to pass through. The fiber ropes can be divided through the line dividing plate 12, so that the fiber ropes inserted in the sheath layer can be evenly arranged and the arranged position is stable, which can improve the uniformity of the overall structural strength of the cable. The die head 11 is also formed with a main channel 122 for the cable core to pass through, and the line dividing hole 121 is connected to the main channel 122. When the sheath of the cable is formed, the fiber rope and the cable core enter the main channel 122 together. A mold core 13 is provided at the other end of the die head 11, and the mold core 13 is formed with a perforation 131 and a plurality of wire entry holes 132. The perforation 131 is used for the cable core in the main channel 122 to pass through, and the plurality of wire entry holes 132 are respectively used for the corresponding fiber ropes in the main channel 122 to pass through. A mold sleeve 14 is provided on one side of the mold core 13 away from the mold head 11. An injection channel 141 is formed between the mold sleeve 14 and the mold core 13 for injecting molten plastic. The mold sleeve 14 forms a molding cavity 142. The main channel 122, the wire entry hole 132 and the injection channel 141 are all connected to the molding cavity 142. The molding cavity 142 is used for the cable core passing through the perforation 131, the fiber rope passing through the wire entry hole 132 and the molten plastic to enter. In this way, multiple fiber ropes can be evenly distributed on the periphery of the cable core.

[0021] When the molten plastic enters the molding cavity 142, it submerges the multiple fiber ropes in the molding cavity 142, and finally cools and shapes in the sheath, so that the multiple fiber ropes are stably set at the specified positions of the sheath. In this way, the extrusion mold 10 can evenly set multiple fiber ropes in the sheath on the periphery of the cable structure by setting the branch plate 12 and the wire entry hole 132, thereby improving the structural strength of the sheath layer, that is, combining the compressive strength of the corrugated aluminum sheath to improve the overall tensile strength of the cable. When the corrugated aluminum sheath cable is bent, the sheath layer is not easy to deform. By inserting multiple fiber ropes in the sheath layer through the extrusion mold 10, the vertical section of the cable end is not easy to shrink and pull off, so that the structure of the formed cable is more stable

[0022] As a specific embodiment, the mold head 11 is further provided with an injection hopper 15, which is connected to the injection channel 141 for injecting plastic molten colloid into the injection channel 141. Specifically, the injection channel 141 is an injection cavity arranged around the outer periphery of the mold core 13, and the end of the mold sleeve 14 is formed with an annular groove for matching the shape of the end of the injection channel 141, and the two ends of the annular groove are respectively connected to the injection channel 141 and the molding cavity 142. In this way, the uniformity of the plastic molten colloid entering the molding cavity 142 can be ensured.

[0023] As a specific embodiment, a cooling assembly 16 is provided on the periphery of the mold sleeve 14 for cooling and shaping the molten plastic in the molding cavity 142. The cooling assembly 16 includes a shell 161 fixed to the mold head 11 by screws, and a cooling cavity is formed between the shell 161 and the mold sleeve 14 for circulating a cooling liquid to cool and shape the molten plastic in the sleeve.

[0024] Attached Figure 1 In the figure, the cold zone assembly 16 is not fully shown, and only one mounting end is shown.

[0025] Furthermore, the mold sleeve 14 is provided with a heat insulating portion 143 between the mold sleeve 14 and the cooling assembly 16 to prevent heat transfer between the injection channel 141 and the cooling assembly 16 , thereby ensuring the stability of the molten state of the plastic molten colloid.

[0026] As a specific implementation, a seal 17 is provided in the installation gap between the mold sleeve 14 and the mold head 11 for sealing the injection channel 141. The installation ends of the mold core 13 and the mold head 11 are respectively formed with mutually matching sealing step portions 18 for fitting each other to increase the sealing stroke and thus seal the injection channel 141, so that the sealing performance of the overall structure can be ensured without increasing the number of parts.

[0027] As a specific implementation, the mold core 13 has a plurality of arc-shaped protrusions 133 evenly distributed on the hole wall of the through hole 131, and the arc-shaped protrusions 133 form a branching hole 121. The arc-shaped protrusions 133 can not only limit the entry position of the cable core, but also limit the layout position of the fiber rope relative to the cable core. The inner diameter range of the branching hole 121 here is 4mm-6mm, and fiber ropes of different diameters can be laid according to the situation.

[0028] In this solution, the branching plate 12 is formed with 6 branching holes 121, and the 6 branching holes 121 are evenly distributed along the circumference of the branching plate 12. The core mold 13 is formed with 6 wire entry holes 132, and the 6 wire entry holes 132 are evenly distributed along the circumference of the core mold 13. The 6 wire entry holes 132 correspond to the 6 branching holes 121 one by one, which can ensure that the fiber rope is evenly and straightly distributed in the sheath of the cable when it is built in, so that the sheath of the cable has tensile and deformation resistance.

[0029] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the above embodiments do not limit the utility model in any form, and any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the utility model.

Claims

1. An extrusion die, characterized in that: include: Mould head; One end of the mold head is provided with a line dividing plate for dividing the fiber rope; The line dividing plate is formed with a plurality of line dividing holes for the fiber ropes to pass through; The die head is also formed with a main channel for the cable core to pass through; The branching hole is connected to the main channel; The other end of the mold head is provided with a mold core; The mold core is formed with a through hole for the cable core to pass through and a plurality of wire entry holes for corresponding fiber ropes to pass through respectively; A mold sleeve is provided on one side of the mold core away from the mold head; An injection channel for injecting plastic molten colloid is formed between the mold sleeve and the mold core; The mold sleeve is formed with a molding cavity for the cable core, fiber rope and plastic molten colloid to enter; The main channel, the wire inlet hole and the injection channel are all connected to the molding cavity.

2. An extrusion die according to claim 1, characterized in that: The mold head is also provided with an injection hopper for injecting plastic molten colloid into the injection channel; The injection hopper is connected to the injection channel.

3. An extrusion die according to claim 2, characterized in that: The injection channel is an injection cavity arranged around the outer circumference of the mold core; The end of the mold sleeve is formed with an annular groove for matching the shape of the end of the injection channel; Two ends of the annular groove are respectively connected to the injection channel and the molding cavity.

4. An extrusion die according to claim 1, characterized in that: The outer periphery of the mold sleeve is provided with a cooling component for cooling and shaping the molten plastic colloid in the molding cavity.

5. An extrusion die according to claim 4, characterized in that: The mold sleeve forms a heat insulating portion between the mold sleeve and the cooling assembly for preventing heat transfer between the injection channel and the cooling assembly.

6. An extrusion die according to claim 4, characterized in that: The cooling assembly includes a housing fixed to the mold head by screws; A cooling cavity for circulating cooling liquid is formed between the shell and the mold sleeve.

7. An extrusion die according to claim 1, characterized in that: A sealing member for sealing the injection channel is provided in the installation gap between the mold sleeve and the mold head; The mounting ends of the mold core and the mold head are respectively formed with sealing step portions for cooperating with each other to increase the sealing stroke and thus seal the injection channel.

8. An extrusion die according to claim 1, characterized in that: The mold core has a plurality of arc-shaped protrusions evenly distributed on the hole wall of the perforation; the arc-shaped protrusions form the line dividing holes.

9. An extrusion die according to claim 8, characterized in that: The inner diameter of the branching hole ranges from 4 mm to 6 mm.

10. An extrusion die according to claim 1, characterized in that: The line splitting plate is formed with 6 line splitting holes; The six branching holes are evenly distributed along the circumference of the branching plate; The mold core is formed with 6 wire inlet holes; The six wire inlet holes are evenly distributed along the circumference of the mold core; The six wire entry holes correspond to the six wire branch holes one by one.

Images