Extruder for cable production

Abstract

The application relates to an extruding machine for cable production, which comprises a machine body, a motor arranged on the machine body, a barrel arranged on the machine body, a die head arranged at the front end of the machine body, a wind pipe connected to the die head, a wire outlet hole opposite to the inner cavity of the wind pipe, a first pipe body rotatably connected in the wind pipe, a plurality of first fan blades arranged on the outer wall of the first pipe body, a plurality of press rollers arranged on the inner wall of the first pipe body, the axes of the plurality of press rollers being parallel to the axis of the first pipe body, a transmission channel for the cable being formed between the plurality of press rollers, the plurality of press rollers being used for pressing the cable, an air extraction pipe being communicated with the wind pipe, the communication port of the air extraction pipe and the wind pipe being located on the side of the first fan blade close to the die head, and an air extraction device for extracting the air in the air extraction pipe being further arranged on the machine body. The application drives the press rollers to rotate by air extraction to compact the cable, and the hot air is used for heating and drying the plastic, so that the energy-saving and emission-reducing effects are achieved.

Description

Technical Field

[0001] This invention relates to the field of extruders, and in particular to an extruder for cable production. Background Technology

[0002] A cable is made of one or more mutually insulated conductors and an outer insulating protective layer, which is usually made of multiple layers of insulating plastic.

[0003] During the cable production process, the surface of the conductor is coated with multiple layers of plastic by an extruder. After the plastic hardens, it forms a protective layer. These multiple layers of protective plastic are all wrapped around the conductor on top of the layer of plastic closest to the conductor. Therefore, the degree of firmness of the plastic layer closest to the conductor in wrapping the conductor affects the service life of the cable in the later stages. Summary of the Invention

[0004] This application provides an extrusion machine for cable production, which rolls the cable to ensure that the plastic outer layer of the conductor firmly wraps around the conductor.

[0005] This application provides a cable extrusion machine with the following technical solution: An extruder for cable production includes a machine body, a motor mounted on the machine body, a barrel mounted on the machine body, and a die head located at the front end of the machine body. The die head has an inlet hole and an outlet hole. An air duct is connected to the die head, and the outlet hole faces the inner cavity of the air duct. A first tube is rotatably connected inside the air duct. Multiple first blades are provided on the outer wall of the first tube. Multiple pressure rollers are provided on the inner wall of the first tube. The axes of the multiple pressure rollers are parallel to the axis of the first tube. A transmission channel for cable passage is formed between the multiple pressure rollers. The multiple pressure rollers are used to press the cable. An air extraction pipe is connected to the air duct. The connection port between the air extraction pipe and the air duct is located on the side of the first blades near the die head. The machine body is also provided with an air extraction device for extracting air from inside the air extraction pipe.

[0006] By adopting the above technical solution, in cable production, the conductor enters the die head through the inlet hole. The hot-melt plastic inside the die head, driven by the screw of the injection molding machine, wraps around the conductor, forming the first layer of insulation. The conductor, now wrapped in plastic, moves through the outlet hole of the die head into the transmission channel. Simultaneously, during cable production, the air extraction assembly draws outside air into the extraction pipe through a duct. As the air flows within the duct, it drives multiple first blades, causing the first pipe body to rotate. During this rotation, multiple pressure rollers press the conductor, already wrapped in the first layer of plastic, onto the surface of the conductor, ensuring a tight wrap. The air flowing through the duct after the conductor is pressed cools the cable, causing the plastic coating on the conductor surface to solidify rapidly, further enhancing the connection strength between the conductor and the plastic.

[0007] Preferably, the air duct has multiple air inlets, all of which are located on the side of the multiple first fan blades away from the mold head.

[0008] By adopting the above technical solution and setting multiple air inlets, the cables located in the duct can dissipate heat evenly, thereby improving the cooling effect of the flowing air on the cables.

[0009] Preferably, the machine body is provided with a base cylinder, the material cylinder is provided on the base cylinder, the air extraction device includes a first rotating shaft rotatably connected inside the base cylinder, multiple second fan blades provided on the first rotating shaft, and a driving part for driving the first rotating shaft to rotate. The end of the air extraction pipe away from the air pipe is connected to the interior of the base cylinder, and the base cylinder is provided with an air outlet hole facing the multiple second fan blades.

[0010] By adopting the above technical solution, when the drive unit drives the first rotating shaft to rotate, multiple second fan blades will also rotate, thereby drawing outside air and high-temperature gas overflowing from the outlet hole into the base cylinder through the air duct and exhaust pipe, and then expelling it through the air outlet. Outside air, when it flows through the air duct, will drive the first tube body to rotate through the first fan blade.

[0011] Preferably, the bottom wall of the material cylinder is the top wall of the base cylinder, the air outlet is opened on the bottom wall of the material cylinder, the air outlet connects the inner cavity of the material cylinder and the inner cavity of the base cylinder, and there are multiple air outlets.

[0012] By adopting the above technical solution, the high-temperature gas overflowing from the outlet hole and the gas that has absorbed the heat of the cable will be drawn into the base cylinder, and then transported into the material cylinder through the air outlet hole, thereby heating and drying the plastic particles in the material cylinder.

[0013] Preferably, the first rotating shaft extends into the material cylinder, and the shaft of the first rotating shaft extending into the material cylinder is provided with a plurality of stirring blades, which are equidistantly distributed along the length direction of the first rotating shaft.

[0014] By adopting the above technical solution, when the first rotating shaft rotates, it will drive several stirring blades to move and achieve the purpose of turning the plastic in the material cylinder, so that the hot air entering the material cylinder from the base cylinder can better contact the plastic particles and ensure the heating and drying effect of the hot air on the plastic particles.

[0015] Preferably, the bottom wall of the material cylinder is the top wall of the base cylinder, the air outlet is opened on the bottom wall of the material cylinder, the air outlet connects the inner cavity of the material cylinder and the inner cavity of the base cylinder, and there are multiple air outlets.

[0016] By adopting the above technical solution, the air that absorbs the heat from the cable and the hot gas emitted from the die head are both sent into the barrel, thereby efficiently heating and drying the plastic in the barrel.

[0017] Preferably, the drive unit includes a first bevel tooth on a first rotating shaft, a second rotating shaft rotatably connected to the machine body, a second bevel tooth and a first pulley on the second rotating shaft, and a second pulley on the output shaft of the motor. The second bevel tooth meshes with the first bevel tooth, the second bevel tooth is located inside the base cylinder, and the first pulley is connected to the second pulley via a belt.

[0018] By adopting the above technical solution, when the motor starts, it will drive the second pulley to rotate. When the second pulley rotates, it will drive the first pulley to rotate through the belt. When the first pulley rotates, it will drive the second shaft and the second bevel gear to rotate. When the second bevel gear rotates, it will drive the first shaft to rotate through the first bevel gear.

[0019] Preferably, the outer wall of the first pipe is provided with multiple sleeves and multiple connecting rods. The multiple connecting rods are slidably connected to the multiple sleeves respectively. The ends of the multiple connecting rods away from the air duct extend into the first pipe and are respectively connected to multiple pressure rollers. The air duct is also provided with a control component for controlling the sliding of the multiple connecting rods.

[0020] By adopting the above technical solution, the position of the connecting rod inside the sleeve is controlled by the control component, thereby controlling the distance between multiple pressure rollers and achieving the purpose of controlling the size of the conveying space, so that the pressure rollers can be adapted to cables of different sizes.

[0021] Preferably, the control component includes abutments disposed on one end of multiple connecting rods near the duct, a pressure tube slidably connected to the outside of the first tube body along the length of the duct, springs sleeved on the outer walls of multiple sleeves, and a driving component for driving the pressure tube to move. One end of each of the multiple springs abuts against the outer wall of the first tube body, and the other end of each of the multiple springs abuts against the multiple abutments respectively. The multiple springs are always in a compressed state. Each of the multiple abutments has an inclined surface at the end near the die head. The distance from the inclined surface to the first tube body gradually increases from the end near the die head to the end away from the die head. The pressure tube is located on the side of the multiple abutments near the die head, and the ends of the multiple abutments near the die head extend into the pressure tube. The pressure tube abuts against the multiple inclined surfaces respectively.

[0022] By adopting the above technical solution, when the driving component controls the pressure tube to move closer to the multiple abutments, the pressure tube will press against the multiple abutments through multiple inclined surfaces, causing the multiple abutments to move closer to the first tube body, the multiple springs to be further compressed, and the multiple connecting rods and multiple pressure rollers to move closer to each other, thus reducing the transmission channel. Conversely, when the driving component controls the pressure tube to move away from the multiple abutments, the multiple springs will push the multiple abutments away from the first tube body, and the multiple connecting rods and multiple pressure rollers to move further away from each other, thus increasing the transmission channel.

[0023] Preferably, the driving component is a sleeve threadedly connected to the outer wall of the first tube, and the outer wall of the sleeve is provided with multiple fixing rods, the ends of the multiple fixing rods away from the sleeve being connected to the inner wall of the pressure tube.

[0024] By adopting the above technical solution, the position of the sleeve on the first tube body can be adjusted by rotating the sleeve, thereby achieving the purpose of controlling and adjusting the movement of the pressure tube.

[0025] Preferably, a support frame is provided below the air duct, and rollers are provided at the bottom of the support frame. A flange for connecting to the mold head is provided at the end of the air duct near the mold head, and the end of the first pipe body near the mold head abuts against the outer wall of the mold head.

[0026] By adopting the above technical solution, it is convenient to connect the air duct to different mold heads, and it is also convenient to remove the air duct from the mold head and adjust the size of the transmission channel.

[0027] The main technical effects of this invention are reflected in the following aspects: 1. The present invention rotates the first tube, thereby causing multiple pressure rollers to press plastic onto the surface of the conductor, so that the plastic tightly wraps the conductor; 2. This invention uses the high-temperature gas overflowing from the die head and the high-temperature gas that has absorbed the heat from the cable to dry the plastic; 3. The distance of the conveying channel of the present invention is adjustable, which allows the pressure roller to press cables of various sizes. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the extruder of this application.

[0029] Figure 2 This is a structural schematic diagram of the extruder of this application from another angle.

[0030] Figure 3 yes Figure 1 A partial sectional view of the extruder along line AA.

[0031] Figure 4 yes Figure 3 A magnified view of a section at point B.

[0032] Figure 5This is a structural schematic diagram of the first tube body, pressure roller, sleeve, connecting rod, and control assembly of this application.

[0033] Figure 6 yes Figure 2 A partial sectional view of the extruder along line CC.

[0034] Reference numerals: 1. Machine body; 11. Motor; 12. Material cylinder; 13. Die head; 14. Inlet hole; 15. Outlet hole; 16. Base cylinder; 17. Air outlet; 18. Agitator blade; 2. Air duct; 21. First pipe body; 22. First fan blade; 23. Pressure roller; 24. Conveying channel; 25. Air inlet; 26. Sleeve; 27. Connecting rod; 28. Fixing rod; 3. Extraction pipe; 4. Extraction device; 4 1. First rotating shaft; 42. Second fan blade; 43. Drive unit; 431. First bevel gear; 432. Second rotating shaft; 433. Second bevel gear; 434. First pulley; 435. Second pulley; 5. Control assembly; 51. Abutment block; 511. Inclined surface; 52. Pressure tube; 53. Spring; 54. Drive component; 541. Tube sleeve; 61. Support frame; 62. Roller; 63. Flange; 64. Bearing. Detailed Implementation

[0035] The present invention will be further described in detail below with reference to the accompanying drawings, so that the technical solution of this application can be more easily understood and mastered.

[0036] Reference Figures 1-3 This embodiment of an extruder for cable production includes a machine body 1, on which a motor 11 for driving a screw rotation is mounted. A base cylinder 16 is also fixed to the top of the machine body 1. The top of the base cylinder 16 has an opening, and a material cylinder 12 is fixedly connected to the top of the base cylinder 16. The bottom wall of the material cylinder 12 directly blocks the top opening of the base cylinder 16, thus the bottom wall of the material cylinder 12 directly becomes the top wall of the base cylinder 16. A die head 13 is fixed to the front end of the machine body 1. The die head 13 has an inlet hole 14 and an outlet hole 15, which are connected. The hot-melt plastic inside the machine body 1 is extruded into the die head 13 by the rotating screw and wraps around the conductor located inside the die head 13.

[0037] References, 1 and Figure 3 A support frame 61 is provided on one side of the die head 13 where the outlet hole 15 is located. The bottom of the support frame 61 is equipped with multiple locking rollers 62 to facilitate movement. A duct 2 is fixed on the support frame 61. A flange 63 is provided on the end of the duct 2 closest to the die head 13. The flange 63 is bolted to the die head 13. The outlet hole 15 of the die head 13 faces the inner cavity of the duct 2, and the axis of the outlet hole 15 of the die head 13 coincides with the axis of the duct 2.

[0038] Reference Figure 1, Figures 3-5 A bearing 64 is installed inside the duct 2, and the bearing 64 is fixed to the inner wall of the duct 2 by multiple tubes. A first tube 21 is fixedly connected to the bearing 64, and the axis of the first tube 21 coincides with the axis of the duct 2. The diameter of the first tube 21 is larger than the diameter of the outlet hole 15. Multiple first fan blades 22 are distributed in a ring on the outer wall of the first tube 21 at the end away from the die head 13. Multiple sleeves 26 are fixed in a ring on the outer wall of the first tube 21 at the end near the die head 13. The inner cavity of the multiple sleeves 26 is connected to the inner cavity of the first tube 21, and the axis of the multiple sleeves 26 is perpendicular to and intersects the axis of the first tube 21.

[0039] Reference Figure 1 , Figures 3-5 Each of the multiple sleeves 26 is slidably connected to a connecting rod 27 along its respective length. One end of each connecting rod 27 extends into the first tube body 21 and is equipped with a pressure roller 23. In this embodiment, the pressure roller 23 is rotatably connected to the connecting rod 27, and the rotation axes of the multiple pressure rollers 23 coincide with the axis of the first tube body 21. The air duct 2 is also equipped with a control component 5 for controlling the sliding of the multiple connecting rods 27. The control component 5 includes a stop block 51 located on one end of the multiple connecting rods 27 near the air duct 2, a pressure tube 52 slidably connected to the outside of the first tube body 21 along the length of the air duct 2, and a spring 53 sleeved on the outer wall of the multiple sleeves 26.

[0040] Reference Figure 1 , Figures 3-5 Multiple pressure blocks are located between the first pipe body 21 and the air duct 2. Each of the multiple abutment blocks 51 has an inclined surface 511 at its end near the die head 13. The distance from the inclined surface 511 to the outer wall of the first pipe body 21 gradually increases from the side near the die head 13 to the side away from the die head 13. One end of each of the multiple springs 53 abuts against the outer wall of the first pipe body 21, and the other end of each spring abuts against the multiple abutment blocks 51. The multiple springs 53 are always in a compressed state. A pressure tube 52 is sleeved outside the first pipe body 21 and located on the side of the multiple abutment blocks 51 near the die head 13. The ends of the multiple abutment blocks 51 near the die head 13 extend into the pressure tube 52, and the inner wall of the pressure tube 52 abuts against the multiple inclined surfaces 511.

[0041] Reference Figure 1 , Figures 3-5 The control component 5 also includes a drive member 54 for driving the movement of the pressure tube 52. The drive member 54 is a sleeve 541 threadedly connected to the outer wall of the first tube body 21. The sleeve 541 is located inside the pressure tube 52. Multiple fixing rods 28 are provided on the outer wall of the sleeve 541. The ends of the multiple fixing rods 28 away from the sleeve 541 are all connected to the inner wall of the pressure tube 52.

[0042] Reference Figure 2 and Figure 6An exhaust pipe 3 connects the air duct 2 and the base cylinder 16. The connection port between the exhaust pipe 3 and the air duct 2 is located on the side of the multiple first fan blades 22 closest to the mold head 13. The machine body 1 is also equipped with an exhaust device 4 for extracting air from the exhaust pipe 3. At the same time, multiple air inlets 25 are opened on the air duct 2, and the multiple air inlets 25 are all located on the side of the multiple first fan blades 22 away from the mold head 13.

[0043] Reference Figure 2 and Figure 6 The air extraction device 4 includes a first rotating shaft 41 rotatably connected inside the base cylinder 16 and multiple second fan blades 42 mounted on the first rotating shaft 41. The axis of the first rotating shaft 41 coincides with the axis of the material cylinder 12. The bottom end of the first rotating shaft 41 is rotatably connected to the machine body 1, and the top end of the first rotating shaft 41 extends into the material cylinder 12 and is rotatably connected to the top wall of the material cylinder 12. Several stirring blades 18 are mounted on the shaft of the first rotating shaft 41 extending into the material cylinder 12. The stirring blades 18 are equidistantly and alternately distributed along the length direction of the first rotating shaft 41. At the same time, multiple air outlets 17 are opened on the bottom wall of the material cylinder 12, and the multiple second fan blades 42 are located below the multiple air outlets 17. The multiple air outlets connect the inner cavity of the material cylinder and the inner cavity of the base cylinder 16.

[0044] Reference Figure 2 and Figure 6 The air extraction device 4 also includes a drive unit 43 for driving the first rotating shaft 41 to rotate. The drive unit 43 includes a first bevel gear 431 sleeved on the first rotating shaft 41, a second rotating shaft 432 rotatably connected to the body 1, a second bevel gear 433 and a first pulley 434 provided on the second rotating shaft 432, and a second pulley 435 provided on the output shaft of the motor 11. One end of the second rotating shaft 432 extends into the base cylinder 16, and the second bevel gear 433 is fixed on the end of the second rotating shaft 432 that extends into the base cylinder 16. The second bevel gear 433 meshes with the first bevel gear 431. The diameter of the second bevel gear 433 is larger than the diameter of the first bevel gear 431, and the diameter of the first pulley 434 is larger than the diameter of the second pulley 435. The axes of the second bevel tooth 433, the second rotating shaft 432, and the first pulley 434 overlap and are perpendicular to and intersect the axis of the first rotating shaft 41. The first pulley 434 is connected to the second pulley 435 via a belt.

[0045] Reference Figures 1-6 The specific extrusion process of the extruder in this application is as follows: First, rotate the sleeve 541 to adjust its position on the first pipe body 21, thereby controlling the movement of the pressure pipe 52 closer to or further away from the multiple abutment blocks 51, so that the transmission channel 24 can just allow the cable to pass through. Then, connect the flange 63 to the die head 13 and connect the end of the first pipe body 21 away from the base cylinder 16 to the air duct 2.

[0046] Next, the machine body 1 is started. After the machine body 1 is started, the motor 11 is powered on and rotates. The rotation of the motor 11 drives the screw of the machine body 1 to rotate, thereby pushing the hot melt plastic into the mold head 13. The conductor enters the mold head 13 from the inlet hole 14. The hot melt plastic in the mold head 13 will wrap the conductor under the push of the screw. Then the conductor wrapped with plastic moves away from the mold head 13 from the outlet hole 15.

[0047] When motor 11 rotates, it drives the second pulley 435 to rotate. When the second pulley 435 rotates, it drives the first pulley 434 to rotate via a belt. When the first pulley 434 rotates, it drives the second shaft 432 and the second bevel gear 433 to rotate. When the second bevel gear 433 rotates, it drives the first shaft 41 to rotate via the first bevel gear 431. When the first shaft 41 rotates, multiple second fan blades 42 also rotate, thereby drawing outside air and high-temperature gas overflowing from the outlet hole 15 into the base cylinder 16 through the air duct 2 and the exhaust pipe 3. Then, the gas is conveyed into the material cylinder 12 through multiple air outlets, working in conjunction with multiple stirring blades 18 to efficiently heat and dry the plastic in the material cylinder 12.

[0048] As air flows within duct 2, it drives multiple first fan blades 22, causing the first tube body 21 to rotate. As the first tube body 21 rotates, multiple pressure rollers 23 rotate and press the conductor, which is already wrapped with the first layer of plastic, within the conveying channel. This presses the plastic onto the surface of the conductor, ensuring a tight wrapping. After the conductor is pressed, the air flowing within duct 2 cools the cable, causing the plastic coating on the conductor surface to solidify quickly, further enhancing the connection strength between the conductor and the plastic.

[0049] Of course, the above are just typical examples of this application. In addition, this application may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed in this application.

Claims

1. An extruder for cable production, comprising a machine body (1), a motor (11) mounted on the machine body (1), a barrel (12) mounted on the machine body (1), and a die head (13) located at the front end of the machine body (1), wherein the die head (13) is provided with an inlet hole (14) and an outlet hole (15), characterized in that: The mold head (13) is connected to the air duct (2), the outlet hole (15) is directly opposite the inner cavity of the air duct (2), the air duct (2) is rotatably connected to the first tube body (21), the outer wall of the first tube body (21) is provided with multiple first fan blades (22), the inner wall of the first tube body (21) is provided with multiple pressure rollers (23), the axes of the multiple pressure rollers (23) are parallel to the axis of the first tube body (21), the multiple pressure rollers (23) form a transmission channel (24) for the cable to pass through, the multiple pressure rollers (23) are used to press the cable, the air duct (2) is connected to a suction pipe (3), the connection port of the suction pipe (3) and the air duct (2) is located on the side of the first fan blade (22) near the mold head (13), the machine body (1) is also provided with a suction device (4) for extracting air from the inside of the suction pipe (3); The outer wall of the first tube body (21) is provided with multiple sleeves (26) and multiple connecting rods (27). The multiple connecting rods (27) are slidably connected in the multiple sleeves (26). The ends of the multiple connecting rods (27) away from the air duct (2) extend into the first tube body (21) and are connected to multiple pressure rollers (23). The air duct (2) is also provided with a control component (5) for controlling the sliding of the multiple connecting rods (27). The control component (5) includes abutments (51) located on one end of multiple connecting rods (27) near the duct (2), a pressure tube (52) slidably connected to the outside of the first tube body (21) along the length of the duct (2), springs (53) sleeved on the outer walls of multiple sleeves (26), and a drive component (54) for driving the pressure tube (52) to move. One end of each of the multiple springs (53) abuts against the outer wall of the first tube body (21), and the other end of each of the multiple springs (53) abuts against the multiple abutments (51). (53) Always in a compressed state, each of the multiple abutments (51) has an inclined surface (511) on one end near the die head (13). The distance from the inclined surface (511) to the first tube (21) gradually increases from the end near the die head (13) to the end away from the die head (13). The pressure tube (52) is located on the side of the multiple abutments (51) near the die head (13). The ends of the multiple abutments (51) near the die head (13) all extend into the pressure tube (52). The pressure tube (52) abuts against the multiple inclined surfaces (511) respectively.

2. The extruder for cable production according to claim 1, characterized in that: The air duct (2) is provided with multiple air inlets (25), and the multiple air inlets (25) are located on the side of the multiple first fan blades (22) away from the mold head (13).

3. The extruder for cable production according to claim 1, characterized in that: The machine body (1) is provided with a base cylinder (16), the material cylinder (12) is provided on the base cylinder (16), the air extraction device (4) includes a first rotating shaft (41) rotatably connected inside the base cylinder (16), multiple second fan blades (42) provided on the first rotating shaft (41), and a drive part (43) for driving the first rotating shaft (41) to rotate. The end of the air extraction pipe (3) away from the air pipe (2) is connected to the interior of the base cylinder (16), and the base cylinder (16) is provided with an air outlet (17) facing the multiple second fan blades (42).

4. An extruder for cable production according to claim 3, characterized in that: The bottom wall of the material cylinder (12) is the top wall of the base cylinder (16). The air outlet (17) is opened on the bottom wall of the material cylinder (12). The air outlet (17) connects the inner cavity of the material cylinder (12) and the inner cavity of the base cylinder (16). There are multiple air outlets (17).

5. An extruder for cable production according to claim 4, characterized in that: The first rotating shaft (41) extends into the material cylinder (12). The shaft of the first rotating shaft (41) extending into the material cylinder (12) is provided with a plurality of stirring blades (18). The plurality of stirring blades (18) are equidistantly distributed along the length direction of the first rotating shaft (41).

6. An extruder for cable production according to claim 3, characterized in that: The drive unit (43) includes a first bevel gear (431) on a first rotating shaft (41), a second rotating shaft (432) rotatably connected to the machine body (1), a second bevel gear (433) and a first pulley (434) on the second rotating shaft (432), and a second pulley (435) on the output shaft of the motor (11). The second bevel gear (433) meshes with the first bevel gear (431). The second bevel gear (433) is located inside the base cylinder (16). The first pulley (434) is connected to the second pulley (435) via a belt.

7. An extruder for cable production according to claim 1, characterized in that: The driving component (54) is a sleeve (541) threadedly connected to the outer wall of the first tube body (21). Multiple fixing rods (28) are provided on the outer wall of the sleeve (541), and the ends of the multiple fixing rods (28) away from the sleeve (541) are all connected to the inner wall of the pressure tube (52).

8. An extruder for cable production according to claim 7, characterized in that: The air duct (2) is provided with a support frame (61) below it, and the bottom of the support frame (61) is provided with a roller (62). The end of the air duct (2) near the mold head (13) is provided with a flange (63) for connecting with the mold head (13). The end of the first pipe body (21) near the mold head (13) abuts against the outer wall of the mold head (13).

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