A hollow breathable sensor wire and its extrusion molding equipment

Abstract

The invention discloses a hollow breathable sensor wire and an extrusion molding device thereof, comprising a wire core, a shielding layer, an inner sheath, an armor layer and an outer sheath, wherein a plurality of wire cores are provided with a hollow breathable tube in the center; the invention comprises a feeding mechanism, an extrusion mechanism and a molding mechanism; the feeding mechanism comprises a screw extruder and a feeding port; the extrusion mechanism comprises a sealing plate, wherein an extrusion hole is arranged on the sealing plate, and an extrusion cover is fixed to the end of the screw extruder; the molding mechanism comprises a molding tube, wherein the molding tube is provided with a molding inlet, a molding port and a spiral tube groove, wherein the spiral tube groove is provided with a spiral tube; the hollow breathable tube is easy to bend flexibly and provides a channel for heat dissipation in the middle; the design of the gap is conducive to the rapid entry of heat into the outer ring channel; after the spiral tube rotates, the inner wall of the spiral tube forms a spiral extrusion shape surrounding the wire for multiple circles, so that the surface of the wire maintains sufficient flatness and the roundness of the wire cross section; when the spiral tube rotates, it fully and evenly contacts with the wire to cool it, and the overall cooling efficiency is high.

Description

Technical Field

[0001] The invention belongs to the technical field of wire processing, and in particular relates to a hollow air-permeable sensor wire and an extrusion molding device thereof. Background Art

[0002] Sensor wires are widely used. As the name suggests, they are mainly used to connect sensors and detection equipment to detect heat, light, sound, motion, gas, liquid or other physical properties, and convert this information into signals and transmit them back to the monitoring equipment for processing and analysis, and finally obtain relevant information of the target object. They are the bridge between sensors and detection equipment.

[0003] At present, new energy vehicles are booming and their intelligence is becoming increasingly higher. Correspondingly, the demand for sensor wires for signal transmission is showing a rapid expansion trend.

[0004] The extrusion molding of sensor wires generally involves passing the wire core directly through the discharge end of the extrusion mechanism, extruding the heated and melted sheath material through the extrusion mechanism, extruding the material through the extrusion head, and then extrude the material around the wire core. The wire core and the sheath coating material are pulled out together through the molding die to form a wire of the desired diameter and shape.

[0005] When sensor wires are faced with high temperature environments, the current internal air permeability of the wires is poor, which is not conducive to overall heat dissipation; during extrusion molding, the wire core with a lower temperature directly contacts the heated molten material and is extruded in a relatively short time, the temperature difference between the two is large, and the coating effect is poor; the wire core and the sheath coating material are generally directly formed through an eye mold. The eye mold has a simple structure and is provided with corresponding holes that match the diameter of the formed wire. When pulling out, it is only squeezed through the holes, the surface flatness of the wire is poor, and the roundness of the wire is poor; at the same time, when the wire is extruded, the cooling effect of the molding mold is poor, and it is mainly cooled by a water tank in the later stage, and the overall cooling efficiency is low. Summary of the invention

[0006] The present invention provides a hollow breathable sensor wire and an extrusion molding device thereof. The hollow breathable tube is flexible and bendable while providing a heat dissipation channel in the middle. The design of the gap is conducive to the rapid entry of heat into the outer ring channel. After the spiral tube rotates, the inner wall of the spiral tube forms a spiral extrusion shape that surrounds the wire multiple times, so that the surface of the wire maintains sufficient flatness and the roundness of the wire cross section. When the spiral tube rotates, it fully and evenly contacts the wire to cool it, and the overall cooling efficiency is high, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a hollow breathable sensor wire, comprising a wire core, a shielding layer, an inner sheath, an armor layer and an outer sheath, wherein a plurality of wire cores are provided, the plurality of wire cores are twisted along the length direction, and a hollow breathable tube is provided in the center of the plurality of wire cores; the hollow breathable tube is provided with a central channel and a plurality of outer ring channels surrounding the central channel, and the outer ring channels are provided with gaps along the length direction thereof; the wire core is coated with the shielding layer, a filler is filled between the wire core and the shielding layer, the shielding layer is covered with the inner sheath, the inner sheath is covered with the armor layer, and the armor layer is covered with the outer sheath.

[0008] Preferably, the plurality of outer ring channels are twisted along the length direction.

[0009] Preferably, the hollow air-permeable tube is made of silicone.

[0010] The present invention provides an extrusion molding device for a hollow breathable sensor wire according to any one of the above items, comprising a feeding mechanism, an extrusion mechanism and a molding mechanism;

[0011] The feeding mechanism comprises a base, a screw extruder is supported on the base through a support frame, a feeding port is arranged on the top of the screw extruder, a rotatable shaft tube is arranged along the center of the screw extruder, a hollow cavity of the shaft tube forms a wire-passing channel, a conveying screw is arranged on the outer wall of the shaft tube located inside the screw extruder, and a first driving mechanism for driving the shaft tube to rotate is arranged on the base;

[0012] The extrusion mechanism comprises a sealing plate located at the end of the screw extruder, the sealing plate is provided with a plurality of extrusion holes surrounding the center, an extrusion cover is fixed at the end of the screw extruder, a cavity is formed between the extrusion cover and the sealing plate, and a molding mechanism is fixed at the middle of one end of the extrusion cover through a bearing;

[0013] The forming mechanism includes a forming tube, one end of which is provided with a reduced forming inlet and a forming port in the middle, the other end of which is provided with a spiral tube groove and is equipped with a spiral tube, the spiral tube is made of a hard heat-conducting material, and both ends of the spiral tube are respectively provided with a connecting inlet and a connecting outlet, the forming tube is provided with grooves corresponding to the connecting inlet and the connecting outlet respectively, the forming tube is provided with holes corresponding to the connecting inlet and the connecting outlet respectively, and is equipped with an inlet connecting tube and an outlet connecting tube, the top of the inlet connecting tube is threadedly connected to the connecting inlet, and the bottom of the outlet connecting tube is threadedly connected to the connecting outlet; the outer sleeve of the forming tube is provided with annular covers that cover the inlet connecting tube and the outlet connecting tube respectively, which are an inlet annular cover and an outlet annular cover respectively, and the bottoms of the inlet annular cover and the outlet annular cover are respectively equipped with an inlet connector and an outlet connector; the base is provided with a second driving mechanism that drives the forming tube to rotate.

[0014] Preferably, the extrusion cover and the screw extruder are provided with corresponding connecting edges and are fixed by screws.

[0015] Preferably, the first driving mechanism includes a first motor fixed on the base, a first pulley is fixed to the output shaft of the first motor, a second pulley corresponding to the first pulley is mounted on the shaft tube, and the first pulley and the second pulley are connected by a first synchronous belt.

[0016] Preferably, the second driving mechanism includes a second motor fixed on the base, a third pulley is fixed to the output shaft of the second motor, a fourth pulley corresponding to the third pulley is installed on the molding tube, and the third pulley is connected to the fourth pulley by a second synchronous belt.

[0017] Preferably, the forming tube is provided with an annular retaining ring which is in smooth contact with both sides of the inlet annular cover and the outlet annular cover respectively.

[0018] Preferably, the inlet annular cover and the outlet annular cover are each composed of two half rings, and the connection between the two half rings is fixed by fastening screws.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The central channel and the outer ring channel make the hollow air permeable tube flexible and bendable while providing a channel for heat dissipation in the middle; the design of multiple outer ring channels makes it difficult for the channels to be completely blocked when the wires are bent, and the central channel and the outer ring channels of the outer ring can also exchange heat between each other.

[0021] 2. The design of the gap is conducive to the heat in the wire core to quickly enter the outer ring channel through the gap, and then be transferred along the outer ring channel. The twisted outer ring channel also forms a spiral embrace of the central channel, which is conducive to sufficient heat exchange between the channels.

[0022] 3. The shaft tube can transfer the molten material temperature to the wire passage, and preheat the wire core before extruding and coating the sheath molten material, thereby reducing the temperature difference between the two during coating and improving the extrusion coating quality.

[0023] 4. When the sheath coating material enters the cavity, it can be evenly mixed through multiple thin streams extruded through the extrusion holes to improve the uniformity and flatness after coating.

[0024] 5. After the spiral tube rotates, the inner wall of the spiral tube will form a spiral extrusion shape that surrounds the wire multiple times, so that the surface of the wire maintains sufficient flatness and the roundness of the wire cross section.

[0025] 6. When the cold air flows from the inlet to the outlet in the spiral tube, the spiral tube rotates and contacts the wires evenly to cool them down. The cold air is efficiently cooled in front of the water tank at the end, and the overall cooling efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the cross-sectional structure of the electric wire of the present invention;

[0027] Figure 2 It is a schematic diagram of the side structure of the hollow air-permeable tube of the present invention;

[0028] Figure 3 It is a schematic diagram of the front and cross-sectional structure of the extrusion molding device of the present invention;

[0029] Figure 4 for Figure 3 A schematic diagram of the enlarged structure at point A;

[0030] Figure 5 for Figure 3 A schematic diagram of the enlarged structure at B;

[0031] Figure 6 It is a schematic diagram of the side view structure of the sealing plate of the present invention;

[0032] Figure 7 It is a schematic diagram of the spiral tube and the connecting inlet of the present invention when viewed from above;

[0033] Figure 8 It is a schematic diagram of the top view of the spiral tube and the connecting outlet of the present invention;

[0034] Fig. 9 It is a schematic diagram of the side view structure of the forming tube of the present invention;

[0035] Fig.10It is a schematic diagram of the side structure of the inlet annular cover of the present invention.

[0036] In the figure: 1. Wire core; 2. Shielding layer; 3. Inner sheath; 4. Armor layer; 5. Outer sheath; 6. Hollow air tube; 7. Center channel; 8. Outer ring channel; 9. Gap; 10. Filler; 11. Base; 12. Support frame; 13. Screw extruder; 14. Feeding port; 15. Shaft tube; 16. Conveying screw; 17. Closing plate; 18. Extrusion hole; 19. Extrusion cover; 20. Bearing; 21. Forming tube; 22. Forming inlet; 23. Forming port; 24. Spiral tube ; 25. Connect the inlet; 26. Connect the outlet; 27. Groove; 28. Inlet connecting pipe; 29. ​​Outlet connecting pipe; 30. Inlet annular cover; 31. Outlet annular cover; 32. Inlet connector; 33. Outlet connector; 34. Screw; 35. First motor; 36. First pulley; 37. Second pulley; 38. First synchronous belt; 39. Second motor; 40. Third pulley; 41. Fourth pulley; 42. Second synchronous belt; 43. Annular retaining ring; 44. Fastening screw. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0038] See also Figure 1-2The present invention provides a hollow breathable sensor wire, comprising a wire core 1, a shielding layer 2, an inner sheath 3, an armor layer 4 and an outer sheath 5. The wire core 1 is provided with a plurality of wire cores 1, and the plurality of wire cores 1 are twisted along the length direction. The wire core 1 is twisted along the length direction to enhance flexibility. A hollow breathable tube 6 is provided at the center of the plurality of wire cores 1, and the hollow breathable tube 6 provides a heat dissipation channel at the center; the hollow breathable tube 6 is provided with a central channel 7 and a plurality of outer ring channels 8 surrounding the central channel 7, the central channel 7 and the outer ring channels 8 make the hollow breathable tube 6 easy to bend flexibly while providing a channel for heat dissipation in the middle, and can be used in conjunction with a terminal with a vent hole for more effective ventilation and heat dissipation, and the design of the plurality of outer ring channels 8 makes it difficult for the channels to be completely blocked when the wire is bent, and the central channel 7 and the outer ring channels 8 of the outer ring can also exchange heat between each other; the outer ring channel 8 is provided with a gap 9 along its length direction, and the gap 9 The design of the gap 9 is conducive to the heat in the core 1 to quickly enter the outer ring channel 8 through the gap 9, and then be transferred along the outer ring channel 8; the core 1 is coated with the shielding layer 2, and the filler 10 is filled between the core 1 and the shielding layer 2, the shielding layer 2 is covered with the inner sheath 3, the inner sheath 3 is covered with the armor layer 4, and the armor layer 4 is covered with the outer sheath 5. The shielding layer 2 can block the interference of the external electromagnetic field and reduce or eliminate the interference of the internal signal of the cable; the filler 10 is filled between the core 1 and the shielding layer 2, and the filler 10 is used to protect the wire harness to prevent it from damage or deformation, and at the same time increase the stability and hardness of the wire harness; the shielding layer 2 is covered with the inner sheath 3, the inner sheath 3 is covered with the armor layer 4, and the armor layer 4 is covered with the outer sheath 5. The sheath and the armor layer can be used to enhance the mechanical strength, durability, heat resistance and corrosion resistance of the wire harness.

[0039] See also Figure 2 , the plurality of outer ring channels 8 are twisted along the length direction; in the present embodiment, the outer ring channels 8 are twisted, and the corresponding gaps 9 are also twisted, which is beneficial for the outer ring channels 8 to fully contact with the inner periphery of the wire core 1, so that the heat can fully enter the outer ring channels 8 and dissipate heat with the air flow in the channels. At the same time, the twisted outer ring channels 8 also form a spiral embrace of the central channel 7, which is beneficial for sufficient heat exchange between the channels.

[0040] See also Figure 1 , the hollow air-permeable tube 6 is made of silicone; in the present embodiment, the silicone tube has excellent high temperature resistance and corrosion resistance, and can also provide stable elastic support for the wire core 1, so that the wire core 1 has a certain elastic buffer space.

[0041] See also Figure 3-9 , the present invention provides an extrusion molding device based on any of the above-mentioned hollow breathable sensor wires, including a feeding mechanism, an extrusion mechanism and a molding mechanism;

[0042] The feeding mechanism includes a base 11, on which a screw extruder 13 is supported by a support frame 12, a feeding port 14 is provided on the top of the screw extruder 13, a rotatable shaft tube 15 is provided along the center of the screw extruder 13, a hollow cavity of the shaft tube 15 forms a wire-passing channel, an outer wall of the shaft tube 15 located inside the screw extruder 13 is provided with a conveying screw 16, and a first driving mechanism for driving the shaft tube 15 to rotate is provided on the base 11; the sheath melt is added through the feeding port 14, the shaft tube 15 is driven to rotate by the first driving mechanism, and the conveying screw 16 is further driven to rotate, so that the sheath melt is squeezed into the extrusion mechanism, the hollow cavity of the shaft tube 15 forms a wire-passing channel, and while conveying the wire core, the shaft tube 15 and the conveying screw 16 can transfer the melt temperature to the wire-passing channel, and preheat the wire core before extruding and coating the sheath melt, thereby reducing the temperature difference between the two during coating, and improving the extrusion coating quality;

[0043] The extrusion mechanism includes a sealing plate 17 located at the end of the screw extruder 13, and the sealing plate 17 is provided with a plurality of extrusion holes 18 around the center. An extrusion cover 19 is fixed at the end of the screw extruder 13, and a cavity is formed between the extrusion cover 19 and the sealing plate 17. A molding mechanism is fixed to the middle of one end of the extrusion cover 19 through a bearing 20. After the sheath melt is extruded by the screw extruder 13, it is extruded to the cavity between the extrusion cover 19 and the sealing plate 17 through the extrusion holes 18 of the sealing plate 17. When the sheath coating material enters the cavity, it can be evenly mixed through a plurality of thin streams extruded through the extrusion holes 18, thereby improving the uniformity and flatness after coating.

[0044] The forming mechanism includes a forming tube 21, one end of which is provided with a reduced forming inlet 22, which provides a gradually increasing extrusion force when the wire core coating material is pulled, so that the coating material is gradually squeezed onto the wire core, and a forming port 23 is provided in the middle, through which the wire core and the coating material are gradually squeezed into the required size of the wire body, and the other end of the forming tube 21 is provided with a spiral tube groove and a spiral tube 24, the inner diameter of which is designed according to the required size of the wire, so that after the spiral tube 24 rotates, the inner wall of the spiral tube will form a spiral that surrounds the wire multiple times. The spiral tube 24 is made of hard heat-conducting material. The two ends of the spiral tube 24 are respectively provided with a connection inlet 25 and a connection outlet 26. The forming tube 21 is provided with grooves 27 corresponding to the connection inlet 25 and the connection outlet 26. The forming tube 21 is provided with holes corresponding to the connection inlet 25 and the connection outlet, and is equipped with an inlet connection tube 28 and an outlet connection tube 29. The top of the inlet connection tube 28 is threadedly connected to the connection inlet 25, and the bottom of the outlet connection tube 29 is connected to the connection inlet 25. The outlet 26 is threadedly connected; the outer cover of the forming tube 21 is provided with an annular cover which covers the inlet connecting tube 28 and the outlet connecting tube 29, respectively, which are an inlet annular cover 30 and an outlet annular cover 31, and the bottoms of the inlet annular cover 30 and the outlet annular cover 31 are respectively provided with an inlet connector 32 and an outlet connector 33; the base 11 is provided with a second driving mechanism which drives the forming tube 21 to rotate; the external cold air supply equipment can be connected through the inlet connector 32, and the cold air collection equipment can be connected through the outlet connector 33. After the cold air enters the inlet annular cover 30, it will pass through the inlet The cold air flows from the inlet to the outlet in the spiral tube 24, and then enters the spiral tube 24. The cold air is spirally transported from the inlet end to the outlet 26, and enters the outlet annular cover 31 through the outlet connecting tube 29, and then is sent out through the outlet connector 33. When the cold air flows from the inlet to the outlet in the spiral tube 24, it exchanges heat with the high-temperature wires, and the temperature of the cold air gradually increases from the inlet to the outlet, while the temperature of the wires gradually decreases when they are sent out. With the material that is easy to conduct heat, the cold air can fully and evenly contact the wires to cool them when the spiral tube 24 rotates, and is efficiently cooled in front of the water tank in the later stage, with high overall cooling efficiency.

[0045] See also Figure 4 The extrusion cover 19 and the screw extruder 13 are provided with corresponding connecting edges and are fixed by screws 34. In this embodiment, the detachable screws 34 facilitate the disassembly of the extrusion cover 19, which is convenient for cleaning the inside of the equipment after the wire processing is completed.

[0046] See also Figure 3The first driving mechanism includes a first motor 35 fixed on the base 11, a first pulley 36 is fixed to the output shaft of the first motor 35, a second pulley 37 corresponding to the first pulley 36 is installed on the shaft tube 15, and the first pulley 36 and the second pulley 37 are connected by a first synchronous belt 38; in this embodiment, the first pulley 36 is driven to rotate by the first motor 35, and the second pulley 37 and the shaft tube 15 are further driven to rotate by the first synchronous belt 38, so as to realize the extrusion work of the screw extruder 13.

[0047] See also Figure 3 , Figure 5 The second driving mechanism includes a second motor 39 fixed on the base 11, a third pulley 40 is fixed to the output shaft of the second motor 39, a fourth pulley 41 corresponding to the third pulley 40 is installed on the forming tube 21, and the third pulley 40 and the fourth pulley 41 are connected by a second synchronous belt 42; in this embodiment, the third pulley 40 is driven to rotate by the second motor 39, and the fourth pulley 41 is further driven to rotate by the second synchronous belt 42, so as to realize the rotation extrusion of the forming tube 21 on the wire, thereby improving the surface smoothness and cross-sectional roundness of the wire after forming.

[0048] See also Figure 5 , Fig. 9 The forming tube 21 is provided with an annular retaining ring 43 which is in smooth contact with both sides of the inlet annular cover 30 and the outlet annular cover 31 respectively; in the present embodiment, since the inlet annular cover 30 and the outlet annular cover 31 are in smooth contact with the forming tube 21, the forming tube 21 can rotate relative to the inlet annular cover 30 and the outlet annular cover 31, and the annular retaining ring 43 can limit the sides of the inlet annular cover 30 and the outlet annular cover 31 to prevent them from sliding, and at the same time, it also enhances the sealing between the inlet annular cover 30 and the outlet annular cover 31 and the forming tube 21.

[0049] See also Fig.10 The inlet annular cover 30 and the outlet annular cover 31 are each composed of two half rings, and the connection between the two half rings is fixed by a fastening screw 44; in this embodiment, the two half rings can be separated and fixed by a detachable fastening screw 44, thereby realizing convenient assembly and disassembly of the inlet annular cover 30 and the outlet annular cover 31 on the forming tube 21.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hollow air-permeable sensor wire, comprising a wire core (1), a shielding layer (2), an inner sheath (3), an armor layer (4) and an outer sheath (5), characterized in that; A plurality of the wire cores (1) are provided, and the plurality of the wire cores (1) are twisted along the length direction, and a hollow air permeable tube (6) is provided at the center of the plurality of the wire cores (1); the hollow air permeable tube (6) is provided with a central channel (7) and a plurality of outer ring channels (8) surrounding the central channel (7), and the outer ring channel (8) is provided with a gap (9) along its length direction, and the gap (9) is opened in the outer ring channel (8) away from the center and toward the outside, so that the outer ring channel (8) is connected to the internal space of the wire through the gap (9); the wire core (1) is coated with the shielding layer (2), and a filler (10) is filled between the wire core (1) and the shielding layer (2), the shielding layer (2) is covered with the inner sheath (3), the inner sheath (3) is covered with the armor layer (4), and the armor layer (4) is covered with the outer sheath (5).

2. A hollow air-permeable sensor wire according to claim 1, characterized in that: The plurality of outer ring channels (8) are twisted in a longitudinal direction.

3. A hollow air-permeable sensor wire according to claim 1, characterized in that: The hollow air-permeable tube (6) is made of silica gel.

4. An extrusion molding device for a hollow breathable sensor wire according to any one of claims 1 to 3, characterized in that: It includes feeding mechanism, extrusion mechanism and forming mechanism; The feeding mechanism comprises a base (11), a screw extruder (13) is supported on the base (11) through a support frame (12), a feeding port (14) is provided on the top of the screw extruder (13), a rotatable shaft tube (15) is provided along the center of the screw extruder (13), a hollow cavity of the shaft tube (15) forms a wire-passing channel, a conveying screw (16) is provided on the outer wall of the shaft tube (15) located inside the screw extruder (13), and a first driving mechanism for driving the shaft tube (15) to rotate is provided on the base (11); The extrusion mechanism comprises a sealing plate (17) located at the end of the screw extruder (13), the sealing plate (17) is provided with a plurality of extrusion holes (18) surrounding the center, an extrusion cover (19) is fixed at the end of the screw extruder (13), a cavity is formed between the extrusion cover (19) and the sealing plate (17), and a molding mechanism is fixed at the middle of one end of the extrusion cover (19) through a bearing (20); The molding mechanism comprises a molding tube (21), one end of the molding tube (21) is provided with a reduced molding inlet (22), and a molding port (23) is provided in the middle, the other end of the molding tube (21) is provided with a spiral tube groove, and a spiral tube (24) is installed, the spiral tube (24) is made of a hard heat-conducting material, the two ends of the spiral tube (24) are respectively provided with a connecting inlet (25) and a connecting outlet (26), the molding tube (21) is provided with grooves (27) corresponding to the connecting inlet (25) and the connecting outlet (26), the molding tube (21) is provided with holes corresponding to the connecting inlet (25) and the connecting outlet, and is provided with an inlet connecting port (25). The molding tube (21) is provided with an annular cover which covers the inlet connecting tube (28) and the outlet connecting tube (29), the top of the inlet connecting tube (28) is threadedly connected to the connecting inlet (25), and the bottom of the outlet connecting tube (29) is threadedly connected to the connecting outlet (26); the molding tube (21) is provided with an annular cover which covers the inlet connecting tube (28) and the outlet connecting tube (29), respectively, which are the inlet annular cover (30) and the outlet annular cover (31), and the bottom of the inlet annular cover (30) and the outlet annular cover (31) are provided with an inlet connector (32) and an outlet connector (33) respectively; the base (11) is provided with a second driving mechanism which drives the molding tube (21) to rotate.

5. The hollow air-permeable sensor wire extrusion molding equipment according to claim 4, characterized in that: The extrusion cover (19) and the screw extruder (13) are provided with corresponding connecting edges and are fixed by screws (34).

6. The hollow air-permeable sensor wire extrusion molding equipment according to claim 4, characterized in that: The first driving mechanism comprises a first motor (35) fixed on the base (11); a first pulley (36) is fixed to the output shaft of the first motor (35); a second pulley (37) corresponding to the first pulley (36) is mounted on the shaft tube (15); the first pulley (36) and the second pulley (37) are connected via a first synchronous belt (38).

7. The hollow air-permeable sensor wire extrusion molding equipment according to claim 4, characterized in that: The second driving mechanism comprises a second motor (39) fixed on the base (11); a third pulley (40) is fixed to the output shaft of the second motor (39); a fourth pulley (41) corresponding to the third pulley (40) is mounted on the molding tube (21); and the third pulley (40) and the fourth pulley (41) are connected via a second synchronous belt (42).

8. The hollow air-permeable sensor wire extrusion molding equipment according to claim 4, characterized in that: The forming tube (21) is provided with an annular retaining ring (43) which is in smooth contact with both sides of the inlet annular cover (30) and the outlet annular cover (31).

9. The hollow air-permeable sensor wire extrusion molding equipment according to claim 4, characterized in that: The inlet annular cover (30) and the outlet annular cover (31) are both composed of two half rings, and the connection between the two half rings is fixed by a fastening screw (44).

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