Silicone extrusion line for cables

Abstract

The present invention relates to the technical field of cable manufacturing, and discloses a silicone extrusion production line for cables, including an extruder, a coating mechanism, a cooling water tank and a traction conveyor, wherein the coating mechanism includes a die barrel, an installation cavity is provided inside the die barrel, a die core shaft is slidably inserted in the installation cavity, the die core shaft is adjustably fixedly connected to the inner wall of the installation cavity, a diameter bearing portion is provided at the end of the die core shaft, and the diameter bearing portion and the inner wall of the installation cavity form an extrusion cavity, and an extrusion ring and a conical bushing are provided in the extrusion cavity. The coating mechanism proposed by the present invention has an adjustable spacing between the diameter bearing portion and the extrusion ring of the die core shaft, so that the volume of the extrusion cavity and the discharge amount are adjustable, and the silicone material flow in the extrusion cavity is extruded and coated on the surface of the cable core, so that the extrusion layer and the cable core are more closely combined, and the thickness of the extrusion layer is adjusted by changing the discharge amount, thereby solving the problem that the surface of multiple cable cores is uneven and the tightness and thickness of the extrusion layer are difficult to adjust.

Description

Technical Field

[0001] The invention relates to the technical field of cable manufacturing, in particular to a silicone extrusion production line for cables. Background Art

[0002] In the cable manufacturing process, the extrusion method of the cable insulation layer and the extrusion die are crucial to the quality of the extruded sheath. In order to solve the problem of cracking in the existing cable production, in the prior art, the patent document with the announcement number CN210156175U discloses a vertical silicone extrusion production line for cables, including a pay-off drum, a first tractor, an extruder, a vulcanizing device, a second tractor and a take-up drum installed in sequence, the vulcanizing device includes an upward vulcanizing section, a downward vulcanizing section and a reversing wheel, the preheater includes a water cooling box, a heating box and a copper tube coil, the heating box is installed on the water cooling box, the copper tube coil is installed in the heating box and is passed through a high-frequency current, the inner diameter of the copper tube coil is larger than the outer diameter of the cable, and the copper tube coil is connected to the water cooling box. The utility model production line can synchronize the vulcanization speed and cross-linking degree of the rubber inner layer and the outer layer, thereby reducing the stress difference between the inner layer and the outer layer after the rubber vulcanization and cross-linking are completed, so that when the cable is formed and used, the insulation layer will not crack due to the large amount of internal stress in itself, affecting its service life, so as to improve the quality of the cable.

[0003] In the actual production process, changes in extrusion and pulling speeds have a great impact on the appearance of cables, especially when multiple cable cores are coated. Due to the uneven surface of multiple cable cores, the tightness and thickness of the extrusion layer are difficult to adjust, resulting in unqualified extrusion dimensions, mainly manifested in core eccentricity, sheath thickness, and outer diameter tolerance, which affects the improvement of production efficiency. Summary of the invention

[0004] The purpose of the present invention is to solve the problem in the prior art that when multiple cable cores are coated, the surface of the multiple cable cores is uneven, the tightness and thickness of the extruded layer are difficult to adjust, resulting in unqualified extruded package size, and a silicone extrusion production line for cables is proposed.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a silicone extrusion production line for cables, comprising an extruder, a coating mechanism, a cooling water trough and a traction conveyor, wherein the coating mechanism comprises a mold barrel body, an installation cavity is arranged inside the mold barrel body, a mold core shaft is slidably inserted in the installation cavity, the mold core shaft is fixedly connected to the inner wall of the installation cavity, a diameter-bearing portion is arranged at the end of the mold core shaft, and the diameter-bearing portion and the inner wall of the installation cavity form an extrusion cavity.

[0006] The end of the mold core shaft is provided with a through hole running through it to the left and right, and the cable core can pass through the through hole. The outlet end of the extruder is connected with the extrusion chamber, and hot-melt material is injected into the extrusion chamber. The surface of the cable core is coated with the hot-melt material in the extrusion chamber, and the coated end of the cable core passes through the cooling water trough and extends into the traction conveyor. The silicone material flows in the extrusion chamber and is extruded and coated on the surface of the cable core, so that the extruded layer and the cable core are more closely combined.

[0007] Preferably, an extrusion ring and a conical bushing are provided in the extrusion cavity, the extrusion ring is fixedly connected to the inner wall of the extrusion cavity, the conical bushing is sleeved on the outer side of the diameter-bearing part, the conical bushing divides the extrusion cavity into a first chamber and a second chamber, and an adjustment component is provided in the mold barrel, and the distance between the conical bushing and the extrusion ring or the diameter-bearing part is controlled by the adjustment component.

[0008] An annular groove is provided on the surface of the mold core shaft, and an external threaded ring is slidably installed in the annular groove. A first transmission rod is slidably installed inside the mold core shaft. The axis center line of the first transmission rod is parallel to the axis center line of the mold core shaft. The two ends of the first transmission rod are respectively fixedly connected to the external threaded ring and the tapered bushing. The spacing between the tapered bushing and the bearing diameter portion can be adjusted through the transmission of the first transmission rod.

[0009] Preferably, the adjusting component includes a rotating disk rotatably mounted at the end of the mold barrel body, a plurality of second transmission rods are slidably mounted in the mold barrel body, a first internal threaded ring and a second internal threaded ring are fixedly mounted at both ends of the second transmission rod, the first internal threaded ring is threadedly connected to the rotating disk, and the second internal threaded ring is threadedly connected to the external threaded ring; the adjusting component also includes a servo motor, the servo motor is fixedly mounted inside the frame of the cooling water trough, the rotating end of the servo motor and the end of the rotating disk are fixedly mounted with synchronous wheels, the two synchronous wheels are driven by synchronous belts, the axis of the rotating disk and the synchronous wheel are both provided with through holes, the cable core can extend from the through hole to the outside of the mold barrel body, the mold core shaft or the conical bushing can be driven to move by forward or reverse rotation of the servo motor, so as to facilitate the adjustment of the discharge amount of the extrusion cavity.

[0010] Preferably, an end plate is fixedly installed at one end of the mold barrel away from the rotating disk, and a window for transmitting the cable core is opened on the surface of the end plate. A speed sensor is installed inside the window. The cable core movement signal detected by the speed sensor is used as a feedback signal for controlling the servo motor, so that the change of the distance between the conical bushing and the bearing part is positively correlated with the change of the cable core movement speed, thereby ensuring that the discharge amount of the extrusion cavity matches the change of the cable core speed.

[0011] Preferably, there are two extruders, which are respectively arranged on both sides of the cooling water trough. The outer cylindrical surface of the tapered bushing is in sliding contact with the inner wall of the extrusion cavity. The discharge end of one extruder is connected to the first cavity, and the discharge end of the other extruder is connected to the second cavity. The discharge speed and temperature of the first cavity and the second cavity can be controlled respectively to meet the molding requirements of the extrusion layer and the stretching layer.

[0012] Preferably, a mounting frame is provided in the mold barrel body, and waist-shaped grooves are provided at both ends of the mounting frame, and bolts are inserted in the waist-shaped grooves. One end of the mounting frame is fixedly connected to the end of the mold core shaft through bolts, and the other end of the mounting frame is fixedly connected to the inner wall of the mold barrel body through bolts, so that the mold core shaft can be adjusted and fixedly connected to the inner wall of the mounting cavity.

[0013] The present invention has the following beneficial effects: 1. The coating mechanism proposed by the present invention has an adjustable spacing between the diameter-bearing part of the mold core shaft and the extrusion ring, so that the volume of the extrusion chamber and the discharge amount are adjustable. The silica gel flows in the extrusion chamber and is coated on the surface of the cable core by extrusion, so that the extrusion layer and the cable core are more closely combined. The thickness of the extrusion layer is adjusted by changing the discharge amount, thereby solving the problem of uneven surface of multiple cable cores and difficulty in adjusting the tightness and thickness of the extrusion layer.

[0014] 2. The coating mechanism proposed in the present invention is provided with a tapered bushing that can move left and right in the extrusion chamber, and the tapered bushing divides the extrusion chamber into a first chamber and a second chamber. The material flow extruded from the first chamber tightly coats the surface of the cable core to eliminate the uneven defect of the cable core surface. The tubular tensile layer extruded from the second chamber is stretched and coated on the outermost layer, which solves the problem of core eccentricity and meets the requirements of tightness and round appearance of the cable sheath layer. By setting up two extruders and inputting hot melt material flow into the first chamber and the second chamber respectively, the discharge speed and temperature of the first chamber and the second chamber can be controlled respectively. The increase of the discharge speed and temperature of the first chamber is conducive to improving the extrusion speed. At this time, the discharge speed of the second chamber decreases, and the material flow temperature is reduced at the same time. Through stretching and coating, the stretching layer can effectively improve the strength of the cable in the stretching direction, which provides convenience for improving the production speed.

[0015] 3. The present invention controls the distance between the tapered bushing and the extrusion ring or the diameter bearing part by setting an adjustment component, and sets a speed sensor to detect the input speed of the cable core. The detection signal of the speed sensor is used as a feedback signal to control the servo motor to control the servo motor to rotate forward or reverse, so as to adjust the left and right movement of the tapered bushing, that is, to adjust the distance between the tapered bushing and the extrusion ring or the diameter bearing part; Due to the instability of the cable pulling speed, the outer diameter of the cable may easily change too much. In this design, when the pulling speed of the cable core increases, the servo motor drives the conical bushing to move, so that the distance between the conical bushing and the diameter-bearing part increases, that is, the discharge speed of the first chamber increases. Conversely, when the pulling speed of the cable core decreases, the servo motor drives the conical bushing to move, so that the distance between the conical bushing and the diameter-bearing part decreases, that is, the discharge speed of the first chamber decreases, thereby reducing the influence of the unstable pulling speed on the thickness of the cable sheath.

[0016] 4. The mold core shaft proposed in the present invention has an external threaded ring on the surface of the mold core shaft threadedly connected to the second internal threaded ring. This assembly method not only enables the adjustment component to control the distance between the tapered bushing and the extrusion ring or the diameter-bearing part, but also can control the distance between the diameter-bearing part and the extrusion ring through the adjustment component, that is, by setting the number of rotations of the servo motor, the extrusion chamber volume and the discharge amount can be adjusted, making debugging more convenient and more accurate, and providing convenience for controlling the outer diameter size of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the silicone extrusion production line for cables proposed by the present invention; Figure 2 This is a schematic diagram of the cross-section structure of the silicone extrusion production line for cables proposed by the present invention; Figure 3 It is a schematic diagram of the front cross-section structure of the mold barrel body proposed by the present invention; Figure 4 This is a schematic diagram of the three-dimensional structure of the mold core shaft proposed by the present invention; Figure 5 for Figure 3 A partial enlarged schematic diagram of (a); Figure 6 for Figure 3 A partial enlarged schematic diagram of (II); Figure 7 This is a schematic diagram of the mold core shaft installation (I); Figure 8 This is the schematic diagram of mold core shaft installation (II); Fig. 9 This is a schematic diagram of the three-dimensional structure of the mounting frame proposed by the present invention.

[0018] In the figure: 1 extruder, 2 die barrel, 3 cooling water trough, 4 traction conveyor, 5 die mandrel, 6 diameter bearing part, 7 extrusion cavity, 8 extrusion ring, 9 tapered bushing, 10 first chamber, 11 second chamber, 12 external thread ring, 13 first transmission rod, 14 rotating disk, 15 second transmission rod, 16 first internal thread ring, 17 second internal thread ring, 18 servo motor, 19 synchronous wheel, 20 speed sensor, 21 end plate, 22 mounting frame, 23 waist groove, 24 cable core. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] Reference Figure 1-9 The invention discloses a silicone extrusion production line for cables, comprising an extruder 1, a coating mechanism, a cooling water tank 3 and a traction conveyor 4. The coating mechanism comprises a die barrel body 2, wherein an installation cavity is arranged inside the die barrel body 2, a die core shaft 5 is slidably inserted in the installation cavity, the die core shaft 5 is adjustably fixedly connected to the inner wall of the installation cavity, a diameter bearing portion 6 is arranged at the end of the die core shaft 5, and the diameter bearing portion 6 and the inner wall of the installation cavity form an extrusion cavity 7, wherein a mounting frame 22 is arranged inside the die barrel body 2, waist grooves 23 are arranged at both ends of the mounting frame 22, bolts are inserted in the waist grooves 23, one end of the mounting frame 22 is fixedly connected to the end of the die core shaft 5 by bolts, and the other end of the mounting frame 22 is fixedly connected to the inner wall of the die barrel body 2 by bolts, such as Figure 3 and Fig. 9 As shown, the installation position of the mold core shaft 5 is adjustable.

[0022] The end of the mold core shaft 5 is provided with a through hole extending left and right, and the cable core 24 can pass through the through hole. The outlet end of the extruder 1 is connected with the extrusion chamber 7, and hot melt material is injected into the extrusion chamber 7. The surface of the cable core 24 is coated by the hot melt material in the extrusion chamber 7. The coated end of the cable core 24 passes through the cooling water tank 3 and extends to the traction conveyor 4. Figure 1 , Figure 2 shown.

[0023] The coating mechanism proposed by the present invention has an adjustable spacing between the diameter-bearing portion 6 of the mold core shaft 5 and the extrusion ring 8, so that the volume of the extrusion chamber 7 and the discharge amount are adjustable. The silicone material flows in the extrusion chamber 7 and is extruded and coated on the surface of the cable core 24, so that the extruded layer and the cable core 24 are more closely combined. The thickness of the extruded layer is adjusted by changing the discharge amount, thereby solving the problem that the surface of multiple cable cores 24 is uneven and the tightness and thickness of the extruded layer are difficult to adjust.

[0024] In this embodiment, an extrusion ring 8 and a conical bushing 9 are provided in the extrusion cavity 7. The extrusion ring 8 is fixedly connected to the inner wall of the extrusion cavity 7. The conical bushing 9 is sleeved on the outer side of the diameter-bearing part 6. The conical bushing 9 divides the extrusion cavity 7 into a first chamber 10 and a second chamber 11. An adjusting component is provided in the mold barrel 2, and the distance between the conical bushing 9 and the extrusion ring 8 or the diameter-bearing part 6 is controlled by the adjusting component.

[0025] Specifically, refer to Figure 3An annular groove is provided on the surface of the mold core shaft 5, and an external threaded ring 12 is slidably installed in the annular groove. A first transmission rod 13 is slidably installed inside the mold core shaft 5. The axis center line of the first transmission rod 13 is parallel to the axis center line of the mold core shaft 5, and the two ends of the first transmission rod 13 are fixedly connected to the external threaded ring 12 and the tapered bushing 9 respectively.

[0026] The adjusting component includes a rotating disk 14 rotatably installed at the end of the mold barrel body 2, and a plurality of second transmission rods 15 are slidably installed in the mold barrel body 2. The two ends of the second transmission rod 15 are respectively fixedly installed with a first internal threaded ring 16 and a second internal threaded ring 17. The first internal threaded ring 16 is threadedly connected to the rotating disk 14, and the second internal threaded ring 17 is threadedly connected to the external threaded ring 12. The adjusting component also includes a servo motor 18, which is fixedly installed inside the frame of the cooling water tank 3. The rotating end of the servo motor 18 and the end of the rotating disk 14 are fixedly installed with synchronous wheels 19, and the two synchronous wheels 19 are driven by synchronous belts.

[0027] The axes of the rotating disk 14 and the synchronous wheel 19 are both provided with through holes, and the cable core 24 can extend from the through holes to the outside of the mold barrel body 2.

[0028] In this embodiment, an end plate 21 is fixedly mounted on one end of the mold barrel body 2 away from the rotating disk 14 , a window for transmitting the cable core 24 is opened on the surface of the end plate 21 , and a speed sensor 20 is installed inside the window.

[0029] There are two extruders 1, which are respectively arranged on both sides of the cooling water tank 3. The outer cylindrical surface of the tapered bushing 9 is in sliding contact with the inner wall of the extrusion cavity 7. The discharge end of one extruder 1 is connected to the first chamber 10, and the discharge end of the other extruder 1 is connected to the second chamber 11.

[0030] Installation and debugging of mold core shaft 5: Figure 7 As shown, the servo motor 18 drives the rotating disk 14 to rotate, so that the first internal thread ring 16 moves to the leftmost side, and then the mold core shaft 5 is inserted into the mold barrel 2 and rotated to make the external thread ring 12 and the second internal thread ring 17 threadedly connected, until the outer wall of the tapered bushing 9 contacts the mouth of the extrusion ring 8, and the diameter bearing part 6 contacts the inner wall of the tapered bushing 9, that is, the distance between the extrusion ring 8, the tapered bushing 9 and the diameter bearing part 6 is zero, and the outlet of the extrusion cavity 7 is in a closed state; refer to Figure 8 , the servo motor 18 drives the rotating disk 14 to rotate in the opposite direction. At this time, the first internal thread ring 16 moves to the right, and the second transmission rod 15 and the second internal thread ring 17 drive the mold core shaft 5 to move to the right. The moving distance can be accurately calculated by the number of rotations and the pitch of the rotating disk 14, that is, according to the thickness of the cable extrusion layer, the size of the extrusion cavity 7 is adjusted, such as Figure 8Where d is the distance between the extrusion ring 8 and the bearing diameter portion 6 (the distance of the mold core shaft 5 moving to the right can be converted into the size of d by the Pythagorean theorem); Then, the mounting frame 22 is installed to fix the position of the mold core shaft 5. It should be noted that the servo motor 18 rotates forward and reversely, and through the telescopic action of the first transmission rod 13 and the second transmission rod 15, the tapered bushing 9 can be driven to translate left and right, and the distance between the tapered bushing 9 and the extrusion ring 8 or the bearing diameter part 6 can be adjusted.

[0031] The mold core shaft 5 proposed in the present invention has an external threaded ring 12 on the surface of the mold core shaft 5 connected to the second internal threaded ring thread 17. This assembly method not only enables the adjustment component to control the distance between the tapered bushing 9 and the extrusion ring 8 or the diameter-bearing part 6, but also can control the distance between the diameter-bearing part 6 and the extrusion ring 8 through the adjustment component, that is, by setting the number of rotations of the servo motor 18, the volume and discharge amount of the extrusion chamber 7 can be adjusted, making debugging more convenient and more accurate, and providing convenience for controlling the outer diameter size of the cable.

[0032] Working principle: During use, Figure 2 As shown, the cable core 24 passes through the mold core shaft 5, the extrusion cavity 7, the cooling water trough 3, and then extends into the traction conveyor 4. The traction force of the traction conveyor 4 moves the cable core 24 to the left, and the two extruders 1 inject hot melt silicone material flows of different pressures and temperatures into the first chamber 10 and the second chamber 11 respectively. The cooling water trough 3, the extruder 1 and the traction conveyor 4 belong to the conventional settings of the prior art and are not described in detail here. like Figure 5 As shown, the material flow in the first chamber 10 (shown at A) is squeezed by the diameter-bearing portion 6 and the tapered bushing 9, and is wrapped on the surface of the cable core 24 (called the extrusion layer, the same below, the surface of the extrusion layer is round and has high density, but the extrusion resistance is large and the discharge speed is slow), and the material flow in the second chamber 11 (shown at B) is squeezed by the extrusion ring 8 and the tapered bushing 9, and is wrapped on the surface of the extrusion layer in a tubular shape (called the stretching layer, the same below, the change in the moving speed of the cable core 24 can change the stretching ratio of the stretching layer, the stretching layer has lower density than the extrusion layer, but has higher uniformity, and can prevent eccentricity and uneven thickness), and the extrusion layer and the stretching layer are bonded together to form a sheath of the cable; A tapered bushing 9 that can move left and right is arranged in the extrusion chamber 7, and the tapered bushing 9 divides the extrusion chamber 7 into a first chamber 10 and a second chamber 11. The material flow extruded from the first chamber 10 tightly covers the surface of the cable core 24, eliminating the uneven defect of the surface of the cable core 24. The tubular tensile layer extruded from the second chamber 11 is stretched and coated on the outside of the extrusion layer, thereby solving the problem of core eccentricity and meeting the requirements of tightness and round appearance of the cable sheath layer. By setting up two extruders 1, hot melt material flow is input into the first chamber 10 and the second chamber 11 respectively, and the discharge speed and temperature of the first chamber 10 and the second chamber 11 can be controlled respectively. The increase of the discharge speed and temperature of the first chamber 10 is conducive to improving the extrusion speed. At this time, the discharge speed of the second chamber 11 decreases, and the material flow temperature is reduced at the same time. Through the stretching and coating method, the stretching layer can effectively improve the strength of the cable in the stretching direction, which provides convenience for improving the production speed.

[0033] The adjusting component controls the distance between the tapered bushing 9 and the extrusion ring 8 or the diameter bearing part 6, and the speed sensor 20 is set to detect the input speed of the cable core 24. The detection signal of the speed sensor 20 is used as a feedback signal to control the servo motor 18, and the servo motor 18 is controlled to rotate forward or reverse, so as to adjust the tapered bushing 9 to move left and right, that is, to adjust the distance between the tapered bushing 9 and the extrusion ring 8 or the diameter bearing part 6; Due to the instability of the cable pulling speed, the outer diameter of the cable may easily change too much. In this design, when the pulling speed of the cable core 24 increases, the servo motor 18 drives the conical bushing 9 to move, so that the distance between the conical bushing 9 and the diameter-bearing part 6 increases, that is, the discharge speed of the first chamber 10 increases. Conversely, when the pulling speed of the cable core 24 decreases, the servo motor 18 drives the conical bushing 9 to move, so that the distance between the conical bushing 9 and the diameter-bearing part 6 decreases, that is, the discharge speed of the first chamber 10 decreases, so that the change in the distance between the conical bushing 9 and the diameter-bearing part 6 is positively correlated with the change in the moving speed of the cable core 24.

[0034] It should be noted that the discharge of the first chamber 10 must take into account both the extrusion expansion effect of the material flow and the cooling contraction effect after extrusion. Due to pressure extrusion, a large reaction force is generated at the inner cavity of the conical bushing 9. Therefore, the discharge amount of the first chamber 10 is much less than that of the second chamber 11. By increasing the outlet area of ​​the first chamber 10 (since the distance d between the extrusion ring 8 and the bearing diameter portion 6 is fixed, at this time, the outlet area of ​​the second chamber 11 is reduced, and the effect on the discharge of the second chamber 11 is small and can be ignored), the total discharge speed of the extrusion chamber 7 is increased to ensure that the discharge amount of the extrusion chamber 7 matches the speed change of the cable core 24, which is beneficial to reduce the influence of the unstable traction speed on the cable sheath thickness (if the cable sheath thickness is adjusted by changing the discharge speed of the extruder 1, the response speed is too slow and the effect is not good).

[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A silicone extrusion production line for cables, comprising an extruder (1), a coating mechanism, a cooling water tank (3) and a traction conveyor (4), characterized in that: The covering mechanism comprises a mold barrel body (2), the mold barrel body (2) is provided with an installation cavity inside, a mold core shaft (5) is slidably inserted in the installation cavity, the mold core shaft (5) is fixedly connected to the inner wall of the installation cavity, and a diameter bearing portion (6) is provided at the end of the mold core shaft (5), and the diameter bearing portion (6) and the inner wall of the installation cavity form an extrusion cavity (7); The end of the mold core shaft (5) is provided with a through hole extending therethrough, and the cable core (24) can pass through the through hole. The outlet end of the extruder (1) is connected to the extrusion chamber (7), and a hot melt material is injected into the extrusion chamber (7). The surface of the cable core (24) is coated with the hot melt material in the extrusion chamber (7), and the coated end of the cable core (24) passes through the cooling water trough (3) and extends into the traction conveyor (4).

2. The silicone extrusion production line for cables according to claim 1, characterized in that: An extrusion ring (8) and a conical bushing (9) are arranged in the extrusion cavity (7); the extrusion ring (8) is fixedly connected to the inner wall of the extrusion cavity (7); the conical bushing (9) is sleeved on the outer side of the diameter-bearing portion (6); the conical bushing (9) divides the extrusion cavity (7) into a first chamber (10) and a second chamber (11); an adjustment component is arranged in the mold barrel (2); and the distance between the conical bushing (9) and the extrusion ring (8) or the diameter-bearing portion (6) is controlled by the adjustment component.

3. The silicone extrusion production line for cables according to claim 2, characterized in that: The surface of the mold core shaft (5) is provided with an annular groove, and an external thread ring (12) is slidably installed in the annular groove. A first transmission rod (13) is slidably installed inside the mold core shaft (5). The axis of the first transmission rod (13) is parallel to the axis of the mold core shaft (5), and the two ends of the first transmission rod (13) are fixedly connected to the external thread ring (12) and the tapered bushing (9) respectively.

4. The silicone extrusion production line for cables according to claim 3, characterized in that: The adjustment assembly comprises a rotating disk (14) rotatably mounted on the end of the mold barrel (2), a plurality of second transmission rods (15) are slidably mounted in the mold barrel (2), a first internal thread ring (16) and a second internal thread ring (17) are respectively fixedly mounted on both ends of the second transmission rods (15), the first internal thread ring (16) is threadedly connected to the rotating disk (14), and the second internal thread ring (17) is threadedly connected to the external thread ring (12).

5. The silicone extrusion production line for cables according to claim 4, characterized in that: The adjustment assembly further comprises a servo motor (18), the servo motor (18) being fixedly mounted inside a frame of the cooling water tank (3), the rotating end of the servo motor (18) and the end of the rotating disk (14) being fixedly mounted with synchronous wheels (19), the two synchronous wheels (19) being driven by a synchronous belt.

6. The silicone extrusion production line for cables according to claim 5, characterized in that: The axes of the rotating disk (14) and the synchronous wheel (19) are both provided with through holes, and the cable core (24) can extend from the through holes to the outside of the mold barrel body (2).

7. The silicone extrusion production line for cables according to claim 6, characterized in that: An end plate (21) is fixedly mounted on one end of the mold barrel body (2) away from the rotating disk (14), a window for transmitting the cable core (24) is opened on the surface of the end plate (21), and a speed sensor (20) is installed inside the window.

8. The silicone extrusion production line for cables according to claim 7, characterized in that: There are two extruders (1), which are respectively arranged on both sides of the cooling water tank (3). The outer cylindrical surface of the conical bushing (9) is in sliding contact with the inner wall of the extrusion chamber (7). The discharge end of one extruder (1) is connected to the first chamber (10), and the discharge end of the other extruder (1) is connected to the second chamber (11).

9. The silicone extrusion production line for cables according to any one of claims 1 to 8, characterized in that: A mounting frame (22) is arranged in the mold barrel body (2), and waist-shaped grooves (23) are provided at both ends of the mounting frame (22). Bolts are inserted into the waist-shaped grooves (23), and one end of the mounting frame (22) is fixedly connected to the end of the mold core shaft (5) through the bolts, and the other end of the mounting frame (22) is fixedly connected to the inner wall of the mold barrel body (2) through the bolts.

Images