Extrusion molding equipment and cable forming system

Abstract

The utility model discloses extrusion molding equipment and a cable molding system, and belongs to the technical field of cable molding, the extrusion molding equipment comprises a mold core provided with an outer conical surface and a mold sleeve provided with an inner conical surface, and an extrusion molding runner used for material extrusion molding is formed by utilizing the opposite matching of the inner conical surface and the outer conical surface; the outer conical surface is arranged to comprise the first conical surface and the second conical surface which are different in taper, and the inner conical surface is arranged to be in the form that the axial position of the inner conical surface is adjustable, so that the extrusion molding quality of materials and the flexible adjusting capacity of extrusion molding equipment are improved. The extrusion molding equipment disclosed by the utility model is compact in structure, convenient and fast to assemble and capable of realizing accurate extrusion molding of materials and ensuring the extrusion molding quality and effect; meanwhile, by adjusting the alignment state and the dislocation state of the extrusion molding runner, the working state of the extrusion molding runner can be correspondingly changed, and adjustment of material pressure drop in the extrusion molding process is achieved, so that application under different extrusion molding requirements is met, the extrusion molding quality of a peripheral coating layer of a cable core assembly is improved, and good practical value is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of cable molding, and in particular relates to an extrusion device and a cable molding system. Background Art

[0002] In the process of cable preparation, it is often necessary to form a coating layer on the periphery of the cable core component, such as forming an outer sheath on the periphery of the cable core component of the electric cable or optical cable. In actual preparation, the outer sheath is usually formed by using extrusion equipment and completing the coating and curing of the insulating protective material through the extrusion molding process.

[0003] During the extrusion molding process, the molding quality of the outer sheath is often affected by many factors, such as the type of extrusion molding material (the characteristics of the material itself), the process parameter control during the extrusion process (such as material extrusion rate, extrusion pressure, molding temperature, etc.), the influence of the extrusion equipment, etc. Among them, since the extruded material is extruded in the material flow channel formed by the extrusion equipment, the structural design of the extrusion equipment (especially the structural design of the extrusion flow channel) has a great influence on the quality of extrusion molding.

[0004] At present, the improvement of extrusion quality is mostly achieved by studying the characteristics of the molding material itself and improving the control parameters of the extrusion process. Relatively little attention is paid to the structural design of the extrusion equipment itself, especially to the research on the extrusion flow channel structure design. Utility Model Content

[0005] In response to one or more of the above-mentioned defects or improvement needs of the prior art, the utility model provides an extrusion equipment and a cable forming system, which can improve the extrusion molding quality of the sheath structure by improving the extrusion flow channel structure of the extrusion equipment, thereby ensuring the efficiency and quality of cable forming.

[0006] To achieve the above-mentioned purpose, one aspect of the utility model provides an extrusion device, comprising a fixed mold frame and a mold core and a mold sleeve which are assembled and arranged on the fixed mold frame; one end of the mold core is arranged as an extrusion section with a conical structure, and the outer periphery of the extrusion section is formed with an outer conical surface; and the mold sleeve is formed with a conical hole which is arranged coaxially with the extrusion section, and the inner periphery of the conical hole is formed with an inner conical surface; the outer conical surface is matched with the inner conical surface, and an extrusion flow channel is formed therebetween, and a feeding hole which is connected with the extrusion flow channel is formed;

[0007] The outer conical surface comprises a first conical surface and a second conical surface with a taper smaller than that of the first conical surface, and the discharge port of the extrusion flow channel is formed at an end of the second conical surface away from the first conical surface; and

[0008] The axial position of the inner conical surface relative to the outer conical surface is adjustable, so that the matching state of the two conical surfaces can be switched between a facing state and a misaligned state.

[0009] As a further improvement of the utility model, the other end of the mold core is configured as a connecting section for assembly with a fixed mold frame;

[0010] A first feeding hole is formed on the outer periphery of the connecting section, and a plurality of second feeding holes are formed on the connecting section; one end of the second feeding hole is connected to the first feeding hole, and the other end is connected to the extrusion flow channel.

[0011] As a further improvement of the utility model, a feeding hole connected to the first feeding hole is provided on the fixed mold frame for feeding the extrusion material;

[0012] and / or

[0013] The second feeding holes are multiple and axially spaced apart from each other in the connecting section.

[0014] As a further improvement of the utility model, a transition section is provided between the connecting section and the extrusion section;

[0015] The transition section is a tapered section with an outer diameter smaller than that of the connecting section, and the end of the feeding hole is connected to the junction of the transition section and the connecting section;

[0016] Correspondingly, a transition inner conical surface matching the outer periphery of the transition section is provided at the end of the mold sleeve corresponding to the transition section.

[0017] As a further improvement of the present invention, the second tapered surface is a cylindrical outer wall surface with zero taper.

[0018] As a further improvement of the utility model, the mold sleeve includes a connecting sleeve with a central through hole and a sleeve core embedded in the central through hole;

[0019] The inner conical surface is formed on a side of the sleeve core close to the mold core, and the axial position of the sleeve core in the middle through hole is adjustable.

[0020] As a further improvement of the utility model, a fastener detachably connected to the connecting sleeve is provided on the side of the sleeve core away from the mold core;

[0021] The connection position of the fastener on the connecting sleeve is adjustable, and one end of the fastener is fixedly connected to the end of the sleeve core.

[0022] As a further improvement of the utility model, the cross-sectional area and the width of the extrusion flow channel are gradually reduced from one end close to the feeding hole to the other end.

[0023] Another aspect of the utility model provides a cable forming system, which includes the extrusion equipment described above, and also includes a wire feeding device arranged on one side of the extrusion equipment;

[0024] The wire feeding equipment comprises a positioning feeding mechanism for continuous feeding of the cable core assembly, and a discharge end of the positioning feeding mechanism is coaxially arranged with the central hole of the mold core.

[0025] As a further improvement of the present invention, the cable molding system is an optical cable molding system, and the cable core assembly is an optical unit component including at least one optical fiber.

[0026] The above-mentioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0027] In general, compared with the prior art, the above technical solutions conceived by the utility model have the following beneficial effects:

[0028] (1) The extrusion equipment of the utility model comprises a mold core provided with an outer conical surface and a mold sleeve provided with an inner conical surface, and utilizes the positive matching of the inner and outer conical surfaces to form an extrusion flow channel for extrusion molding of materials; by arranging the outer conical surface to include a first conical surface and a second conical surface with different tapers, and arranging the inner conical surface in a form in which its axial position is adjustable, the flow channel cross-sectional area at different parts of the extrusion flow channel is adjustable, and by changing the taper between the first and second conical surfaces, the sudden change setting of the extrusion pressure of the material in the extrusion flow channel is achieved, thereby improving the extrusion quality of the material, improving the extrusion molding quality of the outer sheath / coating layer, and further improving the molding quality of the corresponding cable.

[0029] (2) The extrusion equipment of the utility model can quickly realize the formation of the extrusion flow channel and the adjustment of the working state by combining the structure of the mold core and the mold sleeve, utilizing the multi-stage structure on the mold core and the combination of the sleeve core, the connecting sleeve and the fasteners in the mold sleeve. By switching the mold core and the mold sleeve between the aligned state and the misaligned state and switching between different misaligned states, the equipment can be quickly adjusted under different extrusion requirements, simplifying the adjustment process of the extrusion equipment and improving the convenience and flexibility of the use of the extrusion equipment.

[0030] (3) The cable forming system of the utility model utilizes the combination of extrusion equipment and wire feeding equipment to realize continuous and accurate feeding of the cable core assembly, and completes accurate extrusion molding of the outer peripheral coating layer and outer sheath of the cable core assembly at the extrusion equipment, thereby ensuring the efficiency and quality of cable molding. At the same time, by optimizing the specific form of the wire feeding equipment, the feeding of the optical unit assembly is realized, and then the molding of the optical cable is completed, and the accurate molding of the outer peripheral sheath structure of the optical cable is realized, thereby improving the efficiency and yield rate of optical cable preparation.

[0031] (4) The extrusion equipment in the utility model has a compact structure and is easy to assemble. It can realize accurate extrusion of materials for extrusion and ensure the quality and effect of extrusion. At the same time, by adjusting the extrusion flow channel in the alignment state and the misalignment state, the working state of the extrusion flow channel can be changed accordingly, and the pressure drop of the material during the extrusion process can be adjusted, thereby meeting the application under different extrusion requirements and improving the extrusion molding quality of the outer peripheral coating layer of the cable core assembly. It has good practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 It is a schematic diagram of the overall structure of the extrusion equipment in the embodiment of the utility model;

[0034] Figure 2 It is a schematic diagram of the core structure of the extrusion equipment in the embodiment of the utility model;

[0035] Figure 3 It is a schematic diagram of the fixed mold frame structure of the extrusion equipment in the embodiment of the utility model;

[0036] Figure 4 It is a schematic diagram of the mold sleeve structure of the extrusion equipment in the embodiment of the utility model;

[0037] In all the drawings, the same reference numerals represent the same technical features, specifically:

[0038] 1. Mold core; 2. Fixed mold frame; 3. Mold sleeve; 4. Wire feeding equipment;

[0039] 101. First core section; 102. Second core section; 103. Third core section; 104. Fourth core section; 105. First feeding hole; 106. Second feeding hole; 107. Center hole;

[0040] 201, feeding hole; 202, first assembly hole; 203, second assembly hole;

[0041] 301, connecting sleeve; 302, sleeve core; 303, fastener; 401, alignment feeding mechanism. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. In addition, the technical features involved in each embodiment of the utility model described below can be combined with each other as long as they do not conflict with each other.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0045] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral 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, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0047] Example:

[0048] See also Figure 1~Figure 4 The extrusion equipment in the preferred embodiment of the utility model comprises a mold core 1, a fixed mold frame 2 and a mold sleeve 3 which can be combined into an integral structure. The mold core 1 and the mold sleeve 3 are arranged on both sides of the axial direction of the fixed mold frame 2. By combining the three, an extrusion flow channel for extrusion molding of the extruded material is formed inside, thereby completing the extrusion molding process of the corresponding extruded material.

[0049] Specifically, the fixed mold frame 2 is used to fix the mold core 1 and the mold sleeve 3. One end of the mold core 1 is set as a conical structure matching the mold sleeve 3 and forming an outer conical surface; accordingly, the mold sleeve 3 forms an inner conical surface on the side matching the mold core 1. By using the positive matching of the outer conical surface and the inner conical surface, an extrusion flow channel is formed between the two.

[0050] In the specific setting, a first assembly hole 202 penetrating the second end face is opened on the first end face of the fixed mold frame 2, so that the mold core 1 can be inserted into the first assembly hole 202 from the first end face and the mold core 1 is assembled on the fixed mold frame 2.

[0051] During actual setting, the conical structure end of the mold core 1 passes through the first assembly hole 202 from one side of the fixed mold frame 2, and the mold sleeve 3 is connected and set on the other side of the fixed mold frame 2, thereby completing the fixation of the mold core 1 and the mold sleeve 3 on the fixed mold frame 2 and forming an extrusion flow channel.

[0052] At the same time, a feed hole connected to the extrusion channel is formed between the fixed mold frame 2 and the mold core 1, so that the material used for extrusion can enter the extrusion channel through the feed hole, and be extruded from the outlet at the end of the mold sleeve 3, and coated on the outer periphery of the corresponding cable core assembly to form a corresponding coating layer / outer sheath.

[0053] In actual settings, the cross-sectional area of ​​the extrusion flow channel decreases continuously from one end close to the feed hole to the other end; at the same time, the width of the extrusion flow channel (the vertical distance between the inner cone and the outer cone) also decreases continuously from one end close to the feed hole to the other end.

[0054] More specifically, the fixed mold frame 2 in the preferred embodiment is as follows Figure 2 , Figure 3 As shown in FIG. 1 , a second assembly hole 203 of a certain depth is preferably further provided on the side surface of the corresponding mold sleeve 3. Figure 3 The second assembly hole 203 is coaxially arranged with the first assembly hole 202 , and the inner diameter of the second assembly hole 203 is larger than the inner diameter of the first assembly hole 202 at the connection point, and one end of the mold sleeve 3 is embedded in the second assembly hole 203 and connected with the fixed mold frame 2 .

[0055] In more detail, a feeding hole 201 communicating with the first assembly hole 202 is provided on the fixed mold frame 2 for feeding the extrusion material.

[0056] In order to facilitate the feeding of materials, the end of the feeding hole 201 in the preferred embodiment is configured in a bell-mouth shape, such as Figure 3 as shown in .

[0057] Furthermore, the mold core 1 in the preferred embodiment is as follows Figure 1 , Figure 2 As shown in the figure, it includes a conical main body part, which includes a connecting section and an extrusion section arranged axially in sequence, wherein the connecting section is used for sealing and assembling connection with the first assembly hole 202, and a groove is opened on the outer periphery of the connecting section to form a first feeding hole 105. After the connecting section is assembled and connected with the first assembly hole 202, the first feeding hole 105 is connected with the feeding hole 201.

[0058] At the same time, a plurality of second feeding holes 106 are provided on the connecting section, one end of which is connected to the first feeding hole 105 and the other end is connected to the extrusion channel, so that the material fed into the first feeding hole 105 can enter the extrusion channel through the second feeding hole 106.

[0059] In actual setting, the second feeding holes 106 are preferably arranged in a plurality of circumferential directions of the connecting section. At the same time, one end of the plurality of second feeding holes 106 is preferably connected and then connected to the first feeding hole 105, and the other end thereof is connected to different positions of the circumferential direction of the end of the connecting section.

[0060] By providing a plurality of second feeding holes 106 , uniform feeding of the material in the circumferential direction of the mold core 1 is achieved, thereby ensuring uniform feeding of the material in each part of the extrusion flow channel.

[0061] In more detail, in actual configuration, the outer diameter of the connecting section is larger than the outer diameter of the extrusion section, and the end of each second feeding hole 106 is preferably connected to the junction of the connecting section and the extrusion section, such as Figure 2 as shown in .

[0062] In actual settings, the connecting section is also preferably a conical structure, and its taper is preferably different from the taper of the extrusion section; accordingly, the first assembly hole 202 is a conical hole with a certain taper, and the connection of the connecting section to the fixed mold frame 2 is achieved by coaxially embedding the connecting section in the first assembly hole 202.

[0063] Preferably, the connection between the connecting section and the first assembly hole 202 is preferably an interference fit.

[0064] Furthermore, an outer conical surface is formed on the outer periphery of the extrusion section in the preferred embodiment, and the outer conical surface in the preferred embodiment includes a first conical surface and a second conical surface which are respectively and continuously arranged and have different tapers, wherein the first conical surface is arranged on a side close to the connecting section, and its taper is greater than the taper of the second conical surface, so that the taper of the extrusion section forms a sudden change at the junction of the two conical surfaces.

[0065] In the case where the taper of the inner conical surface of the mold sleeve 3 is preferably set to remain continuous and unchanged, the corresponding setting of the above two conical surfaces can make the spacing between the inner and outer conical surfaces along the axial direction suddenly change from the intersection of the two conical surfaces, that is, the cross-sectional area of ​​the extrusion flow channel suddenly changes after the intersection of the two first conical surfaces and the second conical surface. When the material feeding rate and the initial extrusion force applied are kept constant, due to the sudden change in the cross-sectional area of ​​the extrusion flow channel, the extrusion force borne by the material in the unit interval gradually increases, thereby enhancing the extrusion force of the material when it is close to the extrusion flow channel outlet, improving the extrusion effect of the material, and improving the quality of the finished product of the material extruded into the outer sheath structure.

[0066] In such Figure 2 In the preferred embodiment shown, the first cone surface is preferably formed by the outer cone surface of the third core segment 103 , and the second cone surface is preferably formed by the fourth core segment 104 .

[0067] More preferably, the fourth core segment 104 in the preferred embodiment is a cylindrical structure arranged at the end of the mold core 1, and its cylindrical outer wall surface can preferably be regarded as a special conical surface with a taper of 0. Of course, according to the actual setting requirements, the fourth core segment 104 can also be set as a conical segment with a certain taper, as long as its taper is smaller than the taper of the third core segment 103.

[0068] In more detail, the mold core 1 in the preferred embodiment further comprises a first core segment 101 and a second core segment 102 arranged in sequence, wherein the first core segment 101 is preferably a connecting segment of the mold core 1, which has a certain taper, and a first feeding hole 105 is provided on the outer periphery of the middle thereof. Meanwhile, the second core segment 102 is arranged between the first core segment 101 and the third core segment 103, which also has a certain taper, and the maximum value of its outer diameter is smaller than the minimum value of the outer diameter of the first core segment 101, so that a transition step is formed at the connection between the two.

[0069] Preferably, the second feeding hole 106 is connected to the aforementioned transition step to ensure that the extrusion material can enter the extrusion flow channel from the outer periphery of the second core segment 102 .

[0070] Correspondingly, a transition inner conical surface is formed on the inner side of the mold sleeve 3 corresponding to the second core segment 102 , and is arranged on a side of the inner conical surface close to the fixed mold frame 2 .

[0071] Further, the mold sleeve 3 in the preferred embodiment is as follows Figure 4 As shown in , it includes a connecting sleeve 301 for connecting the fixed mold frame 2 and a sleeve core 302 arranged in the middle of the connecting sleeve 301.

[0072] In actual setting, corresponding to the setting of the sleeve core 302, a through hole is opened in the middle of the connecting sleeve 301, and a conical hole is opened on the sleeve core 302. The inner wall surface of the conical hole of the sleeve core 302 forms an inner conical surface that cooperates with the extrusion section of the mold core 1.

[0073] Correspondingly, a transition inner conical surface for cooperating with the second core segment 102 is formed at the end of the through hole in the middle of the connecting sleeve 301, such as Figure 1 as shown in .

[0074] More specifically, corresponding to the fixation of the sleeve core 302 in the connecting sleeve 301 , a fastener 303 is preferably detachably connected and provided on the side of the connecting sleeve 301 away from the fixed mold frame 2 , and the fastener 303 is further preferably threadedly matched with the connecting sleeve 301 .

[0075] In actual settings, the axial position of the core sleeve 302 is preferably adjustable. With this setting, while ensuring that the setting positions of the mold core 1 and the fixed mold frame 2 are relatively fixed, the position of the inner cone surface can be adjusted by changing the axial position of the core sleeve 302, so that the cooperation between the inner cone surface and the outer cone surface can be switched between the "aligned state" (the initial state in which the inner and outer cone surfaces are designed to match) and the "misaligned state" (the working state after changing the position of the inner cone surface relative to the outer cone surface).

[0076] Obviously, the axial position of the inner cone surface relative to the outer cone surface is adjustable. By adjusting the different axial positions of the sleeve core 302, the switching between the aligned state and the misaligned state and the adjustment of different misaligned states can be realized. On this basis, the extrusion pressure of the material in the extrusion flow channel can be quickly controlled, the extrusion quality of the material can be improved, and the molding quality of the corresponding sleeve structure can be improved.

[0077] In actual settings, by connecting the end of the core sleeve 302 with the end of the fastener 303, the core sleeve 302 and the fastener 303 can move synchronously, and then by changing the axial connection position of the fastener 303, the axial position of the core sleeve 302 is adjusted, thereby changing the working state of the inner cone.

[0078] In addition, in order to ensure that the outer sheath molding process is accurately completed by extrusion molding on the outer periphery of the cable core assembly, in actual setting, a center hole 107 is axially penetrated through the middle of the mold core 1 for feeding the cable core assembly of the outer sheath to be molded.

[0079] In this regard, as another aspect of the utility model, a cable forming system is also provided, which includes the aforementioned extrusion equipment, and a wire feeding device 4 is arranged on one side of the extrusion equipment, and the wire feeding device 4 includes a positioning feeding mechanism 401 for continuously feeding the cable core assembly, and the positioning feeding mechanism 401 is coaxially arranged with the center hole 107, so that the continuously fed cable core assembly can be coaxially fed to the discharge port of the extrusion flow channel, and the extruded material is coated at the discharge port to form an outer sheath or coating layer around the cable core assembly.

[0080] In a specific preferred embodiment, the cable forming system is an optical cable forming system, and its wire feeding equipment is used for feeding the optical unit assembly, and can perform coaxial wire feeding of a cable core assembly (ie, optical unit assembly) containing at least one optical fiber.

[0081] The extrusion equipment in the utility model has a compact structure and is easy to assemble. It can realize accurate extrusion of materials for extrusion and ensure the quality and effect of extrusion. At the same time, by adjusting the extrusion flow channel in the aligned state and the misaligned state, the working state of the extrusion flow channel can be changed accordingly, and the pressure drop of the material during the extrusion process can be adjusted, thereby meeting the application under different extrusion requirements, improving the extrusion molding quality of the outer peripheral coating layer of the cable core assembly, and having good practical value.

[0082] It is easy for those skilled in the art to understand that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An extrusion device, comprising a fixed mold frame and a mold core and a mold sleeve which are assembled on the fixed mold frame; one end of the mold core is arranged as an extrusion section with a conical structure, and the outer periphery of the extrusion section is formed with an outer conical surface; and the mold sleeve is formed with a conical hole which is arranged coaxially with the extrusion section, and the inner periphery of the conical hole is formed with an inner conical surface; the outer conical surface is matched with the inner conical surface, and an extrusion flow channel is formed therebetween, and a feeding hole connected to the extrusion flow channel is formed; characterized in that, The outer conical surface comprises a first conical surface and a second conical surface with a taper smaller than that of the first conical surface, and the discharge port of the extrusion flow channel is formed at an end of the second conical surface away from the first conical surface; and The axial position of the inner conical surface relative to the outer conical surface is adjustable, so that the matching state of the two conical surfaces can be switched between a facing state and a misaligned state.

2. The extrusion device according to claim 1, characterized in that The other end of the mold core is configured as a connecting section for assembly with a fixed mold frame; A first feeding hole is formed on the outer periphery of the connecting section, and a plurality of second feeding holes are formed on the connecting section; one end of the second feeding hole is connected to the first feeding hole, and the other end is connected to the extrusion flow channel.

3. The extrusion device according to claim 2, characterized in that A feeding hole connected to the first feeding hole is provided on the fixed mold frame for feeding the extrusion material; and / or The second feeding holes are multiple and axially spaced apart from each other in the connecting section.

4. The extrusion device according to claim 2, characterized in that A transition section is provided between the connecting section and the extrusion section; The transition section is a tapered section with an outer diameter smaller than that of the connecting section, and the end of the feeding hole is connected to the junction of the transition section and the connecting section; Correspondingly, a transition inner conical surface matching the outer periphery of the transition section is provided at the end of the mold sleeve corresponding to the transition section.

5. The extrusion equipment according to any one of claims 1 to 4, characterized in that The second tapered surface is a cylindrical outer wall surface with zero taper.

6. The extrusion equipment according to any one of claims 1 to 4, characterized in that The mold sleeve comprises a connecting sleeve with a central through hole and a sleeve core embedded in the central through hole; The inner conical surface is formed on a side of the sleeve core close to the mold core, and the axial position of the sleeve core in the middle through hole is adjustable.

7. The extrusion device according to claim 6, characterized in that A fastener detachably connected to the connecting sleeve is provided on a side of the sleeve core facing away from the mold core; The connection position of the fastener on the connecting sleeve is adjustable, and one end of the fastener is fixedly connected to the end of the sleeve core.

8. The extrusion equipment according to any one of claims 1 to 4 and 7, characterized in that: The cross-sectional area and width of the extrusion flow channel decrease continuously from one end close to the feeding hole to the other end.

9. A cable forming system, according to the extrusion equipment according to any one of claims 1 to 8, characterized in that: It also includes a wire feeding device arranged on one side of the extrusion device; The wire feeding equipment comprises a positioning feeding mechanism for continuous feeding of the cable core assembly, and a discharge end of the positioning feeding mechanism is coaxially arranged with the central hole of the mold core.

10. The cable forming system according to claim 9, characterized in that: The cable molding system is an optical cable molding system, and the cable core assembly is an optical unit component including at least one optical fiber.

Images