A cable core automated processing equipment

Abstract

The present invention discloses an automatic processing equipment for cable cores, which belongs to the technical field of cable processing. It solves the problem that if the strength of the insulating skin is high, when trying to connect the wires and peel off the insulating skin, the insulating skin itself will have a high structural strength, which makes it easier for construction workers to carry out construction. It includes a first screw extruder and a second screw extruder, and the discharge ports of the first screw extruder and the second screw extruder are connected to a herringbone-shaped heterogeneous skin spray head. The first screw extruder and the second screw extruder are respectively squeezed into molten raw materials of different materials into the heterogeneous skin spray head. The present invention can process the insulating skin outside the cable, and two insulating skins with alternating materials and different strengths can be extruded outside the cable core. When it is necessary to peel off the insulating layer to expose the cable core, the operator only needs to cut the part with lower strength of the insulating layer to easily expose the cable core.

Description

Technical Field

[0001] The present invention relates to the technical field of cable processing, and in particular to an automatic processing device for cable cores. Background Art

[0002] The cable core is the core part of the cable responsible for transmitting electrical energy or signals. It is usually made of materials with good conductive properties, such as copper or aluminum. It is tightly wrapped by an insulating layer to ensure the efficiency and safety of current or signal transmission. The material of the insulating layer can be plastic, rubber or special insulating material, and its function is to prevent current leakage and protect the cable from erosion by the external environment. The design and material selection of the cable core depend on the purpose of the cable, such as power transmission, communication signal transmission or control signal transmission. The outer layer of the cable may also have a protective layer, such as an armor layer or an outer sheath, to enhance the mechanical strength of the cable and its ability to withstand harsh environments. The cross-sectional area and number of the cable core will be designed according to the rated current and voltage of the cable to meet different electrical performance requirements.

[0003] The processing technology of wrapping the cable core with the insulating layer is one of the key steps in the production of wires and cables. First, the copper or aluminum monofilaments are annealed after being heated to a certain temperature to increase the toughness of the monofilaments and reduce their strength to meet the cable's requirements for the conductive core. During the annealing process, the key is to prevent the copper wire from oxidizing. Next, in order to improve the softness of wires and cables and facilitate laying and installation, multiple monofilaments are twisted to form a conductor. During the twisting process, the shape of the conductor can be changed by compacting, such as semicircular, fan-shaped, tile-shaped, etc., to reduce the occupied area of ​​the wire and reduce the geometric dimensions of the cable. Insulation extrusion is the core step of wrapping the insulating layer. Plastic wires and cables mainly use extruded solid insulation layers. The main technical requirements of this process include eccentricity, smoothness and density.

[0004] The insulation layer on the outside of current cables is often made of a single material, and the material on the surface is uniform. There is no alternation of materials in the length direction of the insulation layer. As a result, if the strength of the insulation layer is high, it will be difficult for construction workers to peel off the insulation layer when trying to connect wires because of the high structural strength of the insulation layer itself.

[0005] Therefore, an automatic cable core processing device is proposed to solve or alleviate the above problems. Summary of the invention

[0006] The purpose of the present invention is to solve the shortcomings of the prior art and to propose an automatic processing equipment for cable cores.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A cable core automated processing equipment comprises a first screw extruder and a second screw extruder, wherein the discharge ports of the first screw extruder and the second screw extruder are commonly connected to a herringbone-shaped heterogeneous skin layer ejection head, molten raw materials of different materials are respectively squeezed into the first screw extruder and the second screw extruder into the heterogeneous skin layer ejection head, and the working process of the first screw extruder and the second screw extruder is that the first screw extruder or the second screw extruder alternately extrude, return materials and repeat.

[0009] Preferably, the first screw extruder includes a main connecting pipe and a first guide screw rotatably connected therein, and the second screw extruder includes a secondary connecting pipe and a second guide screw rotatably connected therein, and the discharge ports of the main connecting pipe and the secondary connecting pipe are respectively connected to the two feed ports of the heterogeneous skin ejection head.

[0010] Preferably, the first screw extruder and the second screw extruder are sheathed with a first protective cover and a second protective cover located outside the main connecting pipe and the secondary connecting pipe.

[0011] Preferably, the heterogeneous cortex ejection head comprises an input pipe connected to the main connecting pipe, a secondary pipe connected to the main connecting pipe and the secondary connecting pipe, and an output pipe located at the connection point between the input pipe and the secondary pipe, the input pipe and the secondary pipe are at the same horizontal height and there is an angle less than 90° between the two, the output pipe is arranged downwardly, a shrinking pipe is fixedly connected to the inner side of one end of the input pipe connected to the main connecting pipe, the shrinking pipe is connected to the ejection cortex main pipe, a shielding plate is fixedly connected to the inner side of one end of the secondary pipe away from the secondary connecting pipe, a through hole is provided on the shielding plate, and the shielding plate is provided with a through hole. The baffle is connected to a spray cortex sub-tube connected to a spray cortex main tube through a through hole, and the spray cortex main tube and the spray cortex sub-tube are commonly connected to a spray outlet pipe, an end of the output pipe away from the input pipe is fixedly connected to a sealing plate, and an opening connected to the spray outlet pipe is formed on the sealing plate, a spray primary hole, a spray secondary hole and a wire outlet hole are respectively formed in the spray cortex main tube, the spray cortex sub-tube and the spray outlet pipe, and the central axes of the spray primary hole, the spray secondary hole and the wire outlet hole are respectively the same as the central axes of the spray cortex main tube, the spray cortex sub-tube and the spray outlet pipe.

[0012] Preferably, a first heating chamber is formed between the ejection cortex main tube and the input tube, a second heating chamber is formed between the ejection cortex auxiliary tube and the secondary tube, a cavity is formed between the ejection outlet tube and the output tube, and heating components are arranged in the first heating chamber and the second heating chamber.

[0013] Preferably, the heating component is an electric heating wire.

[0014] Preferably, the angle between the input pipe and the secondary pipe is 25-60°, and the angle formed between the output pipe and the horizontal plane where the input pipe is located is less than 30°.

[0015] The present invention has the following beneficial effects:

[0016] The present invention can extrude two insulating layers of alternating materials on the outside of the cable core, and the structural strength of the two insulating layers can maintain a state of alternating strong and weak. When the insulating layers of the cable core need to be peeled off to expose the cable core, the operator only needs to cut through a section of the insulating layer with weaker structural strength to expose the cable core. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a schematic structural diagram of the first screw extruder and the second screw extruder in the present invention;

[0019] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0020] Figure 3 It is a structural schematic diagram of the first screw extruder and the second screw extruder in the present invention without the first protective cover and the second protective cover;

[0021] Figure 4 for Figure 3 The enlarged view of point B in the middle;

[0022] Figure 5 It is a schematic structural diagram of the first screw extruder and the second screw extruder in the present invention;

[0023] Figure 6 for Figure 5 Enlarged view of point C in the middle;

[0024] Figure 7 It is a cross-sectional view of a heterogeneous skin layer ejection head in the present invention;

[0025] Figure 8 for Figure 7 The enlarged view of point D in the middle;

[0026] Fig. 9 for Figure 7 Enlarged view of point E in the middle;

[0027] Fig.10 for Fig. 9 Enlarged view of G in the middle;

[0028] Fig.11 for Figure 7 Enlarged view of point F in the middle.

[0029] 1. First screw extruder; 2. Second screw extruder; 3. First protective cover; 4. Second protective cover; 5. Heterogeneous skin ejection head; 6. Main connecting pipe; 7. Secondary connecting pipe; 9. First guide screw; 10. Second guide screw; 11. Input pipe; 12. Output pipe; 13. Secondary pipe; 14. Narrowing pipe; 15. First heating chamber; 16. Ejection skin main pipe; 17. Ejection skin auxiliary pipe; 18. Baffle; 19. Second heating chamber; 20. Cavity; 21. Ejection outlet pipe; 22. Ejection primary hole; 23. Ejection secondary hole; 24. Wire outlet hole; 25. Sealing plate. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0033] In the description of the present invention, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the invention is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, 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 should not be understood as a limitation on the present invention.

[0034] Furthermore, the terms “first”, “second”, “third”, etc. are merely used for distinguishing descriptions and are not to be understood as indicating or implying relative importance.

[0035] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] A cable core automated processing equipment, such as Figures 1 to 11 As shown, it includes a first screw extruder 1 and a second screw extruder 2. The discharge ports of the first screw extruder 1 and the second screw extruder 2 are commonly connected to a herringbone-shaped heterogeneous skin ejection head 5. Molten raw materials of different materials are respectively squeezed into the first screw extruder 1 and the second screw extruder 2 into the heterogeneous skin ejection head 5. The working process of the first screw extruder 1 and the second screw extruder 2 is that the first screw extruder 1 or the second screw extruder 2 alternately extrude, return materials and repeat.

[0037] The cable core processing equipment involved in the present invention can evenly extrude two insulating layers on the outside of the cable core, and the material and structural strength of the two insulating layers show alternating changes, one is relatively strong and the other is relatively weak, but the two insulating layers are still located in the same thickness direction, and the two insulating layers are not structurally superimposed in the thickness direction. Therefore, when it is necessary to strip the insulating layers of the cable core to expose the cable core, the operator only needs to select the insulating layer part with lower structural strength for cutting, and the insulating layer can be easily stripped to expose the cable core. This design not only simplifies the stripping process, but also improves the maintenance efficiency and safety of the cable.

[0038] Preferably, the first screw extruder 1 includes a main connecting pipe 6 and a first guide screw 9 rotatably connected therein, and the second screw extruder 2 includes a secondary connecting pipe 7 and a second guide screw 10 rotatably connected therein, and the discharge ports of the main connecting pipe 6 and the secondary connecting pipe 7 are respectively connected to the two feed ports of the heterogeneous skin ejection head 5.

[0039] By providing the first guide screw 9 and the second guide screw 10, when the two are rotated, the two can realize the transportation of the raw material 1 and the raw material 2 in the main connecting pipe 6 and the secondary connecting pipe 7 respectively.

[0040] Preferably, the first screw extruder 1 and the second screw extruder 2 are sleeved with a first protective cover 3 and a second protective cover 4 located outside the main connecting pipe 6 and the secondary connecting pipe 7 .

[0041] The first protective cover 3 and the second protective cover 4 have an effective heat insulation effect, which prevents the heat generated by the heating wires for heating the inside of the main connecting tube 6 and the secondary connecting tube 7 from escaping, and prevents the operator from being scalded by excessive heat during the operation of the first screw extruder 1 and the second screw extruder 2, while also making full use of the heat without wasting it.

[0042] Preferably, the heterogeneous cortex ejection head 5 comprises an input pipe 11 connected to the main connecting pipe 6, a secondary pipe 13 connected to the main connecting pipe 6 and the secondary connecting pipe 7, and an output pipe 12 located at the connection point between the input pipe 11 and the secondary pipe 13, the input pipe 11 and the secondary pipe 13 are at the same horizontal height and there is an angle less than 90° between the two, the output pipe 12 is arranged downwardly inclined, the inner side of the end of the input pipe 11 connected to the main connecting pipe 6 is fixedly connected with a shrinking pipe 14, the shrinking pipe 14 is connected with the ejection cortex main pipe 16, the end of the secondary pipe 13 away from the secondary connecting pipe 7 is fixedly connected with a shielding plate 18, the shielding plate 18 is provided with a through hole, and the shielding plate 18 passes through the through hole It is connected to a spray cortex sub-pipe 17 connected to a spray cortex main pipe 16, and the spray cortex main pipe 16 and the spray cortex sub-pipe 17 are commonly connected to a spray outlet pipe 21, an end of the output pipe 12 away from the input pipe 11 is fixedly connected to a sealing plate 25, and the sealing plate 25 is provided with an opening connected to the spray outlet pipe 21, a spray primary hole 22, a spray secondary hole 23 and a wire outlet hole 24 are respectively formed in the spray cortex main pipe 16, the spray cortex sub-pipe 17 and the spray outlet pipe 21, and the central axes of the spray primary hole 22, the spray secondary hole 23 and the wire outlet hole 24 are respectively the same as the central axes of the spray cortex main pipe 16, the spray cortex sub-pipe 17 and the spray outlet pipe 21.

[0043] By setting the heterogeneous skin ejection head 5, when raw material 1 enters the ejection skin main pipe 16, raw material 1 can flow into the ejection outlet pipe 21 again, and a stress concentration point is formed at the angle between the ejection skin main pipe 16 and the ejection outlet pipe 21, and then when the material is returned to the ejection skin main pipe 16, raw material 1 will be disconnected at the stress concentration point, and then raw material 2 enters the ejection skin auxiliary pipe 17, and the ejection secondary connecting pipe 7 delivers raw material 2 to the ejection outlet pipe 21. At the same time, there is also an angle between the ejection secondary connecting pipe 7 and the ejection outlet pipe 21, and then a stress concentration point is generated. When raw material 2 enters the ejection outlet pipe 21, it will connect and solidify with raw material 1 that has begun to solidify, and when raw material 2 is returned, the stress concentration point will also be broken. It is only necessary to feed raw material 2 and raw material 1 alternately from the ejection skin main pipe 16 and the ejection secondary connecting pipe 7, so that the primary fiber can be ejected through the silk outlet hole 24.

[0044] Preferably, a first heating chamber 15 is formed between the ejection cortex main tube 16 and the input tube 11, a second heating chamber 19 is formed between the ejection cortex auxiliary tube 17 and the secondary tube 13, a cavity 20 is formed between the ejection outlet tube 21 and the output tube 12, and heating components are arranged in the first heating chamber 15 and the second heating chamber 19.

[0045] By arranging heating components in the first heating chamber 15 and the second heating chamber 19, the raw materials entering the ejection cortex main pipe 16 and the ejection cortex auxiliary pipe 17 can be kept in a molten state, thereby avoiding easy solidification during the ejection process and preventing raw materials of different materials from being unable to connect.

[0046] Preferably, the heating component is a heating wire.

[0047] Preferably, the included angle between the input pipe 11 and the secondary pipe 13 is 25-60°, and the included angle between the output pipe 12 and the horizontal plane where the input pipe 11 is located is less than 30°.

[0048] Step 1: Take raw material 1 and raw material 2 with a melting point difference of no more than 20°C and mix them separately through a mixer. Raw material 1 is made of polypropylene and raw material 2 is made of ES to ensure that the texture of raw material 1 and raw material 2 is evenly distributed to avoid uneven material in the subsequent melting process.

[0049] Step 2: Put raw material 1 and raw material 2 into the first screw extruder 1 and the second screw extruder 2 respectively, so that raw material 1 and raw material 2 are stored, and raw material 1 and raw material 2 are naturally guided when the first screw extruder 1 and the second screw extruder 2 are working.

[0050] Step 3: The first screw extruder 1 and the second screw extruder 2 respectively extrude the molten raw material 1 and raw material 2 into the heterogeneous skin layer ejection head 5 which is connected to the discharge ports of the two screw extruders.

[0051] Step 4: The working process of the first screw extruder 1 and the second screw extruder 2 is that the first screw extruder 1 or the second screw extruder 2 first extrude and then return the material, and then the other non-working one of the first screw extruder 1 or the second screw extruder 2 extrude and then return the material, and this is repeated alternately.

[0052] When the first screw extruder 1 extrude the molten raw material 1, the first guide screw 9 rotates forward in the main connecting pipe 6, thereby introducing the molten raw material 1 into the input pipe 11. After entering the input pipe 11, the molten raw material 1 first enters the shrinking pipe 14 for transition, and then the molten raw material 1 enters the ejection primary hole 22 of the ejection skin main pipe 16. During this process, the heating component in the first heating chamber 15 has an insulation effect on the molten raw material 1. When the molten raw material 1 enters the wire outlet hole 24 of the ejection outlet pipe 21 in the output pipe 12, and There is an obtuse angle between the wire outlet hole 24 and the central axis of the first-level ejection hole 22. When the first screw extruder 1 returns the material, the first guide screw 9 rotates in the opposite direction in the main connecting pipe 6, thereby achieving the effect of reverse guidance on the molten raw material. After the molten raw material enters the wire outlet hole 24, it gradually solidifies, and a stress concentration point is formed at the obtuse angle between the wire outlet hole 24 and the central axis of the first-level ejection hole 22. Therefore, when the molten raw material is returned, it will be broken at the stress concentration point, and the molten raw material in the first-level ejection hole 22 will be returned.

[0053] Then the second screw extruder 2 starts working, and the second guide screw 10 rotates forward in the secondary connecting pipe 7 to guide the molten raw material 2 so that the molten raw material 2 enters the secondary pipe 13 and then enters the ejection secondary hole 23 of the ejection cortex secondary pipe 17. Since there is an angle between the input pipe 11 and the secondary pipe 13, when the raw material 2 enters the ejection primary hole 22, the ejection secondary hole 23 and the wire hole 24, it can mainly deviate to the wire hole 24, and the molten raw material 2 in the ejection secondary hole 23 will not enter the ejection primary hole 22. At this time, the molten raw material 2 is in contact with the raw material 2 originally in the ejection secondary hole 23. The gradually solidified raw material 1 in the wire outlet hole 24 comes into contact with the molten raw material 2, and the molten raw material 2 also gradually begins to solidify. At this time, there is an obtuse angle between the wire outlet hole 24 and the central axis of the ejection secondary hole 23. When the second screw extruder 2 returns the material, the second guide screw 10 rotates in the secondary connecting pipe 7 in the opposite direction, thereby having a reverse pulling effect on the molten raw material 2. The molten raw material 2 forms a stress concentration point at the obtuse angle between the wire outlet hole 24 and the central axis of the ejection secondary hole 23. Therefore, when the molten raw material 2 is returned, it will be broken at the stress concentration point, and then the molten raw material 2 returns to the ejection secondary hole 23.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cable core automated processing equipment, characterized in that: The invention comprises a first screw extruder (1) and a second screw extruder (2), wherein the discharge ports of the first screw extruder (1) and the second screw extruder (2) are connected to a herringbone-shaped heterogeneous skin layer ejection head (5), molten raw materials of different materials are respectively squeezed into the first screw extruder (1) and the second screw extruder (2) and enter the heterogeneous skin layer ejection head (5), and the working process of the first screw extruder (1) and the second screw extruder (2) is that the first screw extruder (1) or the second screw extruder (2) alternately extrude, return and repeat; The first screw extruder (1) comprises a main connecting pipe (6) and a first guide screw (9) rotatably connected therein, and the second screw extruder (2) comprises a secondary connecting pipe (7) and a second guide screw (10) rotatably connected therein, and the discharge ports of the main connecting pipe (6) and the secondary connecting pipe (7) are respectively connected to two feed ports of the heterogeneous skin layer ejection head (5); The heterogeneous cortex ejection head (5) comprises an input pipe (11) connected to a main connecting pipe (6), a secondary pipe (13) connected to the main connecting pipe (6) and a secondary connecting pipe (7), and an output pipe (12) located at the connection point between the input pipe (11) and the secondary pipe (13), wherein the input pipe (11) and the secondary pipe (13) are at the same horizontal height and an angle less than 90° is formed between the two, and the output pipe (12) is arranged to be tilted downward, and a shrinking pipe (14) is fixedly connected to the inner side of one end of the input pipe (11) connected to the main connecting pipe (6), and the shrinking pipe (14) is connected to the ejection cortex main pipe (16), and a baffle plate (18) is fixedly connected to the inner side of one end of the secondary pipe (13) away from the secondary connecting pipe (7), and a through hole is opened on the baffle plate (18), and the baffle plate (18) is connected to the main connecting pipe (16) through the through hole. The hole is connected to a spray cortex auxiliary tube (17) connected to a spray cortex main tube (16), and the spray cortex main tube (16) and the spray cortex auxiliary tube (17) are commonly connected to a spray outlet tube (21); one end of the output tube (12) away from the input tube (11) is fixedly connected to a sealing plate (25), and the sealing plate (25) is provided with an opening connected to the spray outlet tube (21); a spray primary hole (22), a spray secondary hole (23) and a wire outlet hole (24) are respectively formed in the spray cortex main tube (16), the spray cortex auxiliary tube (17) and the spray outlet tube (21); the central axes of the spray primary hole (22), the spray secondary hole (23) and the wire outlet hole (24) are respectively the same as the central axes of the spray cortex main tube (16), the spray cortex auxiliary tube (17) and the spray outlet tube (21).

2. The cable core automated processing equipment according to claim 1, characterized in that: The first screw extruder (1) and the second screw extruder (2) are sleeved on the outside with a first protective cover (3) and a second protective cover (4) located on the outside of the main connecting pipe (6) and the secondary connecting pipe (7).

3. The cable core automated processing equipment according to claim 1, characterized in that: A first heating chamber (15) is formed between the ejection cortex main tube (16) and the input tube (11), a second heating chamber (19) is formed between the ejection cortex auxiliary tube (17) and the secondary tube (13), and a cavity (20) is formed between the ejection outlet tube (21) and the output tube (12). Heating components are provided in the first heating chamber (15) and the second heating chamber (19).

4. The cable core automated processing equipment according to claim 3, characterized in that: The heating component is an electric heating wire.

5. The cable core automated processing equipment according to claim 3, characterized in that: The included angle between the input pipe (11) and the secondary pipe (13) is 25-60 degrees, and the included angle between the output pipe (12) and the horizontal plane where the input pipe (11) is located is less than 30 degrees.

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