Extrusion molding processing device for outer sheath of radio frequency cable

Abstract

The invention discloses a radio frequency cable outer sheath extrusion molding processing device, and particularly relates to the cable production field, the radio frequency cable outer sheath extrusion molding processing device comprises a wire core material guiding assembly, an extrusion molding assembly and a traction device, the extrusion molding assembly comprises an extruder and a coating extrusion die, and the wire core material guiding assembly is arranged corresponding to the input end of the coating extrusion die; the cable core material guiding assembly comprises two sets of clamping seats, material guiding protection pipes are fixedly connected to the corresponding positions of the two sets of clamping seats respectively, the material guiding protection pipes are used for wrapping cable cores, the clamping seats are vertically installed on a moving seat in a sliding mode, and a clamping driver is arranged on the moving seat. According to the invention, the material guiding protection tube is arranged to protect the wire core from being inserted into the coating extrusion die for material guiding, the external metal shielding layer of the wire core does not contact with the internal structure of the coating extrusion die in the whole process, the coating extrusion die is not damaged, the service life of the coating extrusion die is prolonged, and the production cost is reduced. The structure damage of the molding surface of the wrapping extrusion die is reduced, and the molding quality of the cable outer sheath is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cable production, more particularly, the present application relates to a radio frequency cable outer sheath extrusion forming processing device. BACKGROUND

[0002] In the field of cable manufacturing, outer sheath extrusion forming is a crucial last key process, which not only gives the cable a complete physical appearance, but also directly determines the environmental adaptability, mechanical protection performance and long-term operation reliability of the cable.

[0003] The forming of the outer sheath generally adopts continuous extrusion forming technology, and the high-temperature molten rubber is continuously and stably pushed to a special covering extrusion die (commonly known as "machine head") through an extruder. The molten rubber is directly wrapped on the advancing core under the action of pressure, and through the design of the compression ratio of the die, the rubber is tightly filled in the gap of the core and forms the outer sheath.

[0004] Among them, for radio frequency cable (also known as coaxial cable), it has an outer conductor / shield layer, mainly undertakes the functions of electromagnetic shielding and signal loop, and is mainly composed of a complex metal structure of braided copper mesh, longitudinal aluminum foil or their combination. For some radio frequency cables, it is necessary to ensure that the outer conductor / shield layer is fully combined with the rubber of the outer sheath, so in the actual production process, it is necessary to directly wrap and extrude the outer conductor / shield layer to form the outer sheath layer.

[0005] In order to ensure that the extrusion formed outer sheath layer is smooth and complete in surface and qualified in quality, the hole wall of the forming cavity of the output end of the covering extrusion die needs to be smooth and flat, and in order to improve the forming quality of the outer sheath, the length of the forming cavity needs to be increased to improve the forming effect of the outer sheath. However, for some relatively soft cores, in the process of inserting the core end into the covering extrusion die for material guiding, the outermost metal shield layer of the core is easy to contact with the forming cavity, causing friction damage to the hole wall, which will affect the surface quality of the outer sheath layer, and also reduce the service life of the covering extrusion die. SUMMARY

[0006] The radio frequency cable outer sheath extrusion forming processing device provided by the present application solves the problem that in the existing outer sheath extrusion forming production of some radio frequency cables, the outermost metal shield layer of the core is easy to contact with the forming cavity in the process of inserting the core into the covering extrusion die, causing friction damage to the hole wall, which will affect the surface quality of the outer sheath layer, and also reduce the service life of the covering extrusion die.

[0007] In order to achieve the above object, the present application provides the following technical scheme: a radio frequency cable outer sheath extrusion forming device, comprising a wire core lead assembly, an extrusion forming assembly and a traction device, the extrusion forming assembly comprises an extruder and a coating extrusion die, the wire core lead assembly is arranged at the input end of the coating extrusion die, the wire core lead assembly comprises two groups of clamping seats, the clamping seats are fixedly connected with lead pipe at positions corresponding to each other, and the lead pipe is used for wrapping the wire core; The clamping seat is vertically slidably installed on the moving seat, and the moving seat is provided with a clamping driver for driving the clamping seat to vertically move. The wire core lead assembly further comprises a transverse sliding support assembly for supporting the moving seat to slide transversely. The traction device is used for fixing the front end of the wire core inserted into the coating extrusion die and pulling the wire core to straighten the wire core in the coating extrusion die.

[0008] Preferably, the side of the clamping seat away from the coating extrusion die is provided with a plugging pipe, the inner side of the plugging pipe is provided with a semicircular ring sealing structure, the contact positions of the two groups of lead pipes are provided with sealing structures, the front end of the lead pipe is further provided with a plug, the plug is used for being inserted into the front end of the circular pipe structure formed after the two groups of lead pipes contact, and the plugging pipe is further provided with a fluid connecting pipe, and the fluid connecting pipe is connected with a gas extraction device through a pipeline.

[0009] Preferably, the inside of the clamping seat is rotatably installed with a driving roller, the driving roller is matched with the wire core, the driving roller is driven to rotate by a rotating driver, and the two groups of driving rollers form extrusion on the wire core after the two groups of lead pipes contact each other.

[0010] Preferably, the plugging pipe is provided with at least two groups of fluid connecting pipes, and the other group of fluid connecting pipes is further connected with a low-temperature fluid providing assembly, the low-temperature fluid assembly comprises a conveying pump for conveying low-temperature fluid to the inner side of the lead pipe.

[0011] Preferably, a plurality of overflow holes are formed in the side wall of the lead pipe close to the front end portion, an elastic sheet is attached to the outside of the overflow hole, the rear end of the elastic sheet is fixedly connected with the surface of the lead pipe, and a one-way valve assembly is formed.

[0012] Preferably, an isolation coating assembly is further arranged between the clamping seat and the coating extrusion die, the isolation coating assembly comprises a first connecting pipe shell, the first connecting pipe shell is movably arranged between the coating extrusion die and the clamping seat, the isolation coating assembly is provided with a through hole coaxially corresponding to the forming cavity of the coating extrusion die, the inside of the first connecting pipe shell is provided with a containing cavity, the containing cavity stores an isolation material, and the containing cavity is provided with a connecting hole at the position corresponding to the through hole.

[0013] Preferably, the isolation material is water, the accommodation cavity is connected with a water supply pipe, the water supply pipe is connected with a water supply pump, the water supply pipe is used for supplementing water to the accommodation cavity, and a sponge structure is arranged in the abutting hole.

[0014] Preferably, a sliding pipe is further arranged between the first abutting pipe shell and the material guiding protection pipe, the sliding pipe is slidingly sleeved outside the material guiding protection pipe, the sliding pipe is also provided with an abutting hole at a position corresponding to the abutting hole of the accommodation cavity, the sliding pipe is slidingly installed in the through hole of the first abutting pipe shell, a material scraping portion is arranged at an end of the inner side of the sliding pipe away from the coating extrusion die, and the material scraping portion is in contact with the surface of the material guiding protection pipe and has damping.

[0015] Preferably, a gas blowing anti-backflow assembly is further arranged between the isolation coating assembly and the coating extrusion die, the gas blowing anti-backflow assembly comprises a second abutting pipe shell, the second abutting pipe shell is slidingly arranged in a region between the clamping seat and the coating extrusion die, an air guide cavity is arranged in the second abutting pipe shell, the air guide cavity is connected with a gas blowing abutting pipe, the gas blowing abutting pipe is connected with a gas blowing pump, corresponding sealing structures are arranged in the second abutting pipe shell at positions corresponding to the coating extrusion die and the first abutting pipe shell, and an inclined flow channel is further arranged in the first abutting pipe shell and inclined away from the coating extrusion die, the inclined flow channel is in communication with the air guide cavity.

[0016] Preferably, the traction device comprises a bundling structure, the bundling structure is used for bundling and connecting the front end of the wire core, the bundling structure is connected to a winding drum on the cable winding equipment, and the traction of the bundling structure and the wire core is formed by driving the rotation of the winding drum of the winding equipment.

[0017] The present application has the following beneficial effects: The present application has the following beneficial effects:

[0018] The present application has the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a use scene diagram of the present application; Figure 2 is a matching state diagram between the core material leading assembly and the overmolding extrusion die of the present application; Figure 3 is a whole structure schematic diagram of the core material leading assembly of the present application; Figure 4 is a state diagram when the leading pipe follows the core to be inserted into the overmolding extrusion die of the present application; Figure 5 is a state diagram when the clamping jaw structure is used as the traction device to clamp and pull the core of the present application; Figure 6 is a state diagram when the bundling structure is used as the traction device to bundle and pull the core of the present application; Figure 7 is a structure schematic diagram of the improved core material leading assembly of the present application; Figure 8 is a leading material state schematic diagram after the isolation coating assembly and the air blowing anti-backflow assembly are added to the present application; Figure 9 is a whole structure schematic diagram of the isolation coating assembly of the present application; Figure 10 is a matching state diagram between the leading pipe and the isolation coating assembly when the leading pipe retreats after the leading material is completed of the present application; Figure 11 is a state diagram when the air blowing anti-backflow assembly blows and cleans the surface of the cable after the leading material is completed of the present application; Figure 12 is a state diagram when the overflow hole is arranged in the front part of the leading pipe of the present application; Figure 13 is a state diagram when the fluid overflows from the overflow hole when the low-temperature fluid is injected into the leading pipe of the present application.

[0020] In the figure: 1, core material leading assembly; 11, clamping seat; 111, driving roller; 12, leading pipe; 121, overflow hole; 122, elastic sheet; 13, moving seat; 131, clamping driver; 132, transverse sliding support assembly; 14, blocking pipe; 141, fluid connecting pipe; 142, semicircular ring sealing structure; 15, plug; 2, extrusion molding assembly; 21, extruder; 22, overmolding extrusion die; 3, core pretreatment assembly; 4, cooling and shaping assembly; 5, core; 6, clamping jaw structure; 7, bundling structure; 8, isolation coating assembly; 81, first connecting pipe shell; 82, accommodating cavity; 83, sliding pipe; 831, scraping part; 84, connecting hole; 9, air blowing anti-backflow assembly; 91, second connecting pipe shell; 92, air guiding cavity; 93, air blowing connecting pipe; 94, inclined flow channel. DETAILED DESCRIPTION

[0021] The following will be further described in detail in combination with the drawings. It is necessary to point out here that the following specific embodiments are only used to further illustrate the application and cannot be understood as limiting the scope of protection of the application. Those skilled in the art can make some non-essential improvements and adjustments to the application according to the above application content.

[0022] Referring to the drawings accompanying the specification Figure 1 and Figure 2 A radio frequency cable outer sheath extrusion forming device, comprising a wire core material leading assembly 1 and an extrusion forming assembly 2, the extrusion forming assembly 2 comprises an extruder 21 and a covering extrusion die 22, the covering extrusion die 22 is arranged at the output end of the extruder 21, the wire core material leading assembly 1 is arranged corresponding to the input end of the covering extrusion die 22, referring to the drawings accompanying the specification Figure 3 , the wire core material leading assembly 1 comprises two groups of clamping seats 11, the two groups of clamping seats 11 are respectively fixedly connected with material leading protection tubes 12 at positions corresponding to each other, the material leading protection tubes 12 are used for wrapping and covering the wire core 5, the material leading protection tubes 12 are semi-circular shell structures, and the two groups of material leading protection tubes 12 form a complete circular tube structure after abutting close to each other, wherein the clamping seat 11 is vertically slidingly installed on a moving seat 13, the moving seat 13 is provided with a clamping drive 131 (such as a pneumatic cylinder), the clamping seat 11 is fixedly installed at the output end of the clamping drive 131, and the clamping drive 131 is used to drive the clamping seat 11 to move vertically, thereby realizing the driving control of the mutual approach or separation of the two groups of clamping seats 11, so as to realize the clamping and loosening of the wire core 5. In addition, the wire core material leading assembly 1 further comprises a transverse sliding support assembly 132, which is used to support the transverse sliding of the moving seat 13. Specifically, the transverse sliding support assembly 132 is a support frame structure with a transverse guide rail, and the moving seat 13 is slidingly installed on the transverse guide rail of the transverse sliding support assembly 132. The moving seat 13 can be manually pushed to move, or a moving drive (such as a linear motor or a pneumatic cylinder) can be arranged on the transverse sliding support assembly 132 to drive the moving seat 13 to move transversely, so as to facilitate the clamping of the two groups of clamping seats 11 on the wire core 5, and after the material leading protection tube 12 wraps and covers the front section (i.e. the section close to the front, which is only used for initial introduction into the covering extrusion die 22) of the wire core 5, the moving seat 13 is driven to move, so that the material leading protection tube 12 and the wire core 5 are inserted into the covering extrusion die 22, and the material leading work is completed (the material leading refers to introducing the front section of the wire core 5 into the covering extrusion die 22 for subsequent outer sheath extrusion forming work).

[0023] Specifically, referring to the drawings accompanying the specification Figure 1The coating extrusion die 22 is equipped with a wire core pretreatment component 3 on one side corresponding to its input end, and a cooling and shaping component 4 on one side corresponding to its output end. The wire core feeding component 1 is located between the wire core pretreatment component 3 and the coating extrusion die 22. The wire core pretreatment component 3 is equipment for performing corresponding processing on the wire core 5 before coating extrusion molding, such as surface cleaning and surface activation treatment. The moving seat 13 can be directly set on the frame of the wire core pretreatment component 3, or a separate frame can be set. The wire core 5, after being pretreated by the corresponding equipment on the wire core pretreatment component 3, is conveyed to the wire core feeding component 1. Initially, the two sets of clamps 11 are separated, as shown in the attached instruction manual. Figure 2 After the front end of the wire core 5 is placed between the two sets of clamps 11, the two sets of clamps 11 are controlled to approach and align with each other, clamping the wire core 5 with the clamps 11 and making the two sets of feed tubes 12 contact each other to form a complete circular tube structure (note that the end of the wire core 5 should be located inside the formed circular tube structure and should not protrude from the feed tubes 12). At the same time, the circular tube structure formed by the feed tubes 12 is aligned coaxially with the forming cavity of the coating extrusion die 22. At this time, the drive moving seat 13 moves forward (i.e., moves closer to the coating extrusion die 22). Refer to the attached instruction manual. Figure 4 This allows the feed tube 12, along with the wire core 5, to be inserted into the covering extrusion die 22.

[0024] After the conductor 5 is fully inserted into the extrusion die 22 along with the feed tube 12, the clamping can be released by controlling the two sets of clamps 11 to move away from each other, thus loosening the conductor 5. At this time, by manipulating the conductor 5 to extend forward out of the feed tube 12, the front end of the conductor 5 (i.e., the front end area, the front section mentioned above, which covers a larger area than the front end) can be connected to the traction device. The traction device pulls the conductor 5, and after the conductor 5 is subjected to traction force, it will be in a taut state and will not contact the inner wall of the forming cavity of the extrusion die 22. At this time, the moving seat 13 and the feed tube 12 can be controlled to retract, completing the feed operation. During this process, the outer metal shielding layer of the conductor 5 will not come into contact with the internal structure of the extrusion die 22, especially not with the inner wall of the forming cavity. Therefore, it will not cause damage to the extrusion die 22, greatly improving the service life of the extrusion die 22, reducing structural damage to the forming surface of the extrusion die 22, and improving the forming quality of the outer sheath during cable production.

[0025] Among them, refer to the appendix of the instruction manual Figure 5 The clamping structure 6 can be used to clamp the front end of the wire core 5, and the clamping structure 6 can be installed on a linear drive device to form a traction device to pull the wire core 5. Alternatively, the cable winding equipment equipped in the cable production system can be used as a traction device to pull the wire core. Refer to the attached instruction manual. Figure 6The front end of the core 5 is banded and connected by using the banding structure 7, and the banding structure 7 is connected to a winding drum on the cable winding equipment. By driving the rotation of the winding drum by the winding equipment, the banding structure 7 and the core 5 are pulled. Then, with the continuous movement of the core 5, the extruder 21 extrudes the molten rubber material into the covering extrusion die 22. By the internal structure of the covering extrusion die 22, the molten rubber material is wrapped on the core 5 and moves forward with the core 5. Then, the radio frequency cable is output after being shaped in the forming cavity. The output radio frequency cable needs to be fully cooled by the cooling and shaping assembly 4 (usually a multi-section water tank, which uses a spraying or soaking method, and the temperature gradient is controlled) to make the sheath material solidify and shape. Finally, the finished cable is wound by the cable winding equipment.

[0026] It should be noted that in the above scheme, the extrusion molding assembly 2, the core pretreatment assembly 3 and the cooling and shaping assembly 4 are all common equipment in cable production, so their specific structures and principles are not explained in detail in this embodiment.

[0027] In the above embodiment, for the radio frequency cable with a relatively large thickness of the outer sheath layer, the relative diameter of the minimum hole part designed to prevent the backward flow of the molten rubber material in the forming cavity and the die is relatively large, so the lead-in protection tube 12 can be designed to be relatively thick. When the lead-in protection tube 12 needs to be separated from the core 5 later, the lead-in protection tube 12 also has enough space to move to release the clamping of the core 5. However, for the radio frequency cable with a relatively small thickness of the outer sheath layer and a relatively small diameter of the minimum hole part, the thickness and movable range of the lead-in protection tube 12 are limited, so the lead-in protection tube 12 is designed to be relatively thin. However, since the lead-in protection tube 12 needs to have a certain length to protect the core 5 from being completely inserted into the covering extrusion die 22, the strength of the lead-in protection tube 12 is limited when the lead-in protection tube 12 is long and thin, and the lead-in protection tube 12 is prone to deformation. Especially when there is a large amount of rubber material remaining in the covering extrusion die 22, the two lead-in protection tubes 12 are prone to deformation during the movement of the lead-in protection tube 12, and a gap is easily formed between the two lead-in protection tubes 12, which causes the molten rubber material remaining in the covering extrusion die 22 to enter the lead-in protection tube 12 and contact the surface of the core 5, thereby making it difficult for the lead-in protection tube 12 to be separated from the core 5. Therefore, the core lead-in assembly 1 is improved accordingly in this embodiment. Specifically, refer to the drawings. Figure 7The side of the clamp holder 11 away from the covering extrusion die 22 is provided with a blocking pipe 14, and the two sets of blocking pipes 14 are in contact with each other after clamping the lead protection pipe 12, and form a closed body. In addition, the inside of the blocking pipe 14 is provided with a semicircular ring sealing structure 142, and the contact position of the two sets of lead protection pipes 12 is also provided with a sealing structure. The front end of the lead protection pipe 12 is also fitted with a plug 15. When the two sets of clamp holders 11 clamp the wire core 5, the two sets of lead protection pipes 12 are closed to each other and form a seal, the two sets of blocking pipes 14 are closed to each other and form a seal, and the semicircular ring sealing structure 142 is in close contact with the outer metal shielding layer of the wire core 5 to form a seal. Then the plug 15 is inserted into the front end of the circular pipe structure formed by the two sets of lead protection pipes 12, so that the lead protection pipe 12 forms a complete sealed body. In addition, the blocking pipe 14 is also provided with a fluid connecting pipe 141, which is connected to the air extraction device through a pipeline. Then, after the lead protection pipe 12 wraps the wire core 5, the air inside the lead protection pipe 12 is extracted by the air extraction device, so that the inside of the lead protection pipe 12 forms a corresponding negative pressure state, and the lead protection pipe 12 can be more closely matched with the wire core 5, so that the lead protection pipe 12 is more stable, and the gap between the two sets of lead protection pipes 12 is avoided. The molten rubber material penetrates, and the plug 15 blocks the front end of the lead protection pipe 12, so that the molten rubber material cannot enter from the front end of the lead protection pipe 12. When the lead protection pipe 12 is completely inserted into the covering extrusion die 22, the plug 15 can be removed, so as to further improve the convenience of using the lead protection pipe 12.

[0028] Further, due to space limitations, the lead protection pipe 12 is not easy to separate after penetrating the covering extrusion die 22, so the inside of the clamp holder 11 is rotatably provided with a drive roller 111, and the drive roller 111 is matched with the wire core 5. The drive roller 111 is driven to rotate by a rotating driver, such as a servo motor installed at a proper position outside the clamp holder 11. The drive roller 111 can be provided with a self-locking structure, or directly use the self-locking of the servo motor. After the two sets of lead protection pipes 12 are in contact with each other, the two sets of drive rollers 111 form extrusion on the wire core 5, thereby forming extrusion and fixation on the wire core 5. When the lead protection pipe 12 is inserted into the covering extrusion die 22, the plug 15 is removed, and the drive roller 111 is driven to rotate, so that the wire core 5 can be moved forward out of the lead protection pipe 12 to be connected with the traction device. At the same time, when it is necessary to control the lead protection pipe 12 to retreat, the rotation of the clamp holder 11 can be accelerated until the lead protection pipe 12 retreats out of the covering extrusion die 22, and then the two sets of clamp holders 11 are separated, thereby further improving the separation efficiency of the lead protection pipe 12 and the wire core 5, and improving the practicability of the device.

[0029] Further, when the residual molten rubber material in the coating extrusion die 22 is more, it will form a full wrap on the lead pipe 12. Although the lead pipe 12 can be selected to be a smooth metal structure or a ceramic structure, it will still form a certain adhesion, and when the lead pipe 12 moves backward, it will be carried backward, causing an impact on the die. Therefore, the embodiment also provides the following technical solutions. Specifically, the plugging pipe 14 is provided with at least two groups of fluid connecting pipes 141. In addition to one group of fluid connecting pipes 141 connected to the air pump, the other group of fluid connecting pipes 141 can also be connected to a low-temperature fluid providing assembly. The low-temperature fluid assembly includes a delivery pump for delivering low-temperature fluid to the inside of the lead pipe 12. The low-temperature fluid can be selected to be low-temperature water or low-temperature air (pre-cooled by a cooling device). Specifically, when the lead pipe 12 is inserted into the coating extrusion die 22, the plug 15 is opened, and low-temperature air is input into the lead pipe 12 to cool the lead pipe 12. At this time, the rubber material attached to the surface of the lead pipe 12 will form a certain solidification, and it is not easy to form a backward connection when the lead pipe 12 is moved backward, thereby making the residual rubber material more easily separated from the lead pipe 12. In addition, the wire core 5 can not be removed first, and low-temperature water can be input into the lead pipe 12 to achieve better cooling effect. In addition, a group of fluid connecting pipes 141 for draining water can be further provided to form a circulating cooling. After cooling is completed, the water is drained, and then the plug 15 is removed (usually the front part of the cable has various processing problems, so the front cable will be cut off in the subsequent process. Therefore, the influence on the front wire core 5 in this process can be ignored).

[0030] Referring to the drawings Figure 12 and Figure 13 The separation of the rubber material from the lead pipe 12 can also be accelerated by outputting fluid from the inside of the lead pipe 12 to the outside, for example, a plurality of overflow holes 121 are formed on the side wall of the lead pipe 12 close to the front end portion. The outside of the overflow hole 121 is attached with an elastic sheet 122, and the rear end of the elastic sheet 122 is fixedly connected to the surface of the lead pipe 12, thereby forming a one-way valve assembly. When the inside of the lead pipe 12 is under negative pressure, the elastic sheet 122 seals the overflow hole 121. After the lead is finished, the plug 15 can not be opened, and low-temperature fluid such as water is input into the lead pipe 12 to open the elastic sheet 122 by water pressure, thereby penetrating into the bonding surface between the rubber and the lead pipe 12 to accelerate the separation of the rubber and the lead pipe 12.

[0031] Further, in addition to the above-mentioned mode, the adhesion of the molten rubber to the lead pipe 12 can also be reduced by coating an isolation material on the surface of the lead pipe 12, for example, referring to the drawings Figure 8 and Figure 9, the isolating coating assembly 8 is further provided between the clamping seat 11 and the over-extrusion die 22, the isolating coating assembly 8 comprises a first docking pipe shell 81, the first docking pipe shell 81 is movably arranged between the over-extrusion die 22 and the clamping seat 11, for example, through a linear driving device, and is installed on a rack of the wire core pretreatment assembly 3, and the isolating coating assembly 8 is provided with a through hole corresponding to a forming cavity of the over-extrusion die 22, in actual use, the circular pipe structure formed by the two groups of material guiding protection pipes 12 can pass through the through hole, and the first docking pipe shell 81 is internally provided with a containing cavity 82, the containing cavity 82 internally stores an isolating substance, and the containing cavity 82 is provided with a docking hole 84 at a position corresponding to the through hole, wherein the isolating substance can be a liquid substance such as water or a release agent, or a powder material such as talcum powder or mica powder, and preferably water or talcum powder.

[0032] Specifically, when the material guiding protection pipe 12 passes through the isolating coating assembly 8 forwardly, the isolating substance is uniformly laid on the surface of the material guiding protection pipe 12 through the docking hole 84, and then enters the over-extrusion die 22, and can form a partition with the molten rubber material, thereby further improving the separation effect of the subsequent material guiding protection pipe 12. In addition, when the isolating substance is water, a water supply pipe can be added to supply water for a long time, so that a water film is formed on the surface of the material guiding protection pipe 12 passing through the isolating coating assembly 8, but a sponge is preferably arranged in the docking hole 84 to improve the forming effect of the water film. When the isolating substance is talcum powder, the talcum powder does not flow continuously and does not leak because of poor flowability.

[0033] It should be noted that when the isolating substance is water, even if residual water is formed in the extrusion molding assembly 2, the residual water will evaporate subsequently and will not continuously affect the processing. Talcum powder can also be treated by blowing and cleaning, and the talcum powder does not flow to the extrusion molding part because of poor flowability, so it will not have a long-term impact. As mentioned above, the front part of the cable needs to be cut off later, so the impact on the front part of the cable at the initial stage can be ignored.

[0034] Further, since only the material guiding protection pipe 12 needs to be coated on the surface of the material guiding protection pipe 12 during advancement, referring to the drawings Figure 9 and Figure 10 , the first docking pipe shell 81 and the material guiding protection pipe 12 are further provided with a sliding pipe 83, the sliding pipe 83 is slidably sleeved on the outside of the material guiding protection pipe 12, the sliding pipe 83 is also provided with a docking hole 84 at a position corresponding to the docking hole 84 of the containing cavity 82, the sliding pipe 83 is slidably installed in the through hole of the first docking pipe shell 81, and the inner side of the sliding pipe 83 is provided with a scraping part 831 away from the over-extrusion die 22, the scraping part 831 is in contact with the surface of the material guiding protection pipe 12 and has damping, and therefore, referring to the drawings Figure 9, when the lead protection pipe 12 advances, the sliding pipe 83 is also pushed forward, and the abutting hole 84 of the accommodating cavity 82 and the sliding pipe 83 are mutually abutted to form a communication, so that the isolation material in the accommodating cavity 82 can be left on the surface of the lead protection pipe 12, and when the lead protection pipe 12 retreats, referring to the description of the accompanying drawings Figure 10 , the scraping part 831 is pushed backward, the abutting hole 84 between the sliding pipe 83 and the accommodating cavity 82 is mutually misaligned to form a blockage, thereby avoiding that when the lead protection pipe 12 is separated from the isolation coating assembly 8, the isolation material continues to flow out to affect the rear part of the core 5, and in addition, when the sliding pipe 83 reaches the limit position, the scraping part 831 can scrape the rubber material remaining on the surface of the lead protection pipe 12 when the lead protection pipe 12 continues to retreat, thereby forming effective cleaning of the lead protection pipe 12.

[0035] In addition, in order to further reduce the backward flow of the molten rubber material during the retreat of the lead protection pipe 12, the embodiment also provides the following scheme, in particular, referring to the description of the accompanying drawings Figure 8 and Figure 10 , the isolation coating assembly 8 and the covering extrusion die 22 are further provided with a blowing anti-backflow assembly 9, the blowing anti-backflow assembly 9 includes a second abutting pipe shell 91, and the second abutting pipe shell 91 is also slidingly arranged in the area between the clamping seat 11 and the covering extrusion die 22, and the difference is that the inside of the second abutting pipe shell 91 is provided with a gas guide cavity 92, the gas guide cavity 92 is connected with a blowing abutting pipe 93, the blowing abutting pipe 93 is connected with a blowing pump, and the second abutting pipe shell 91 is provided with corresponding sealing structures corresponding to the position of the covering extrusion die 22 and the position of the first abutting pipe shell 81, when the lead protection pipe 12 is inserted into the covering extrusion die 22, the first abutting pipe shell 81 tightly abuts the second abutting pipe shell 91, the second abutting pipe shell 91 tightly abuts the covering extrusion die 22, and the scraping part 831 is in contact with the lead protection pipe 12 to form a certain sealing, at this time, the blowing pump supplies gas to the blowing abutting pipe 93, and then blows gas to the second abutting pipe shell 91, increases the air pressure in the cavity of the covering extrusion die 22, and then avoids the backward flow of the molten rubber material, until the lead protection pipe 12 completely leaves the molten rubber area.

[0036] At the same time, the first abutting pipe shell 81 is further provided with an inclined flow channel 94 inclined away from the covering extrusion die 22, the inclined flow channel 94 is in communication with the gas guide cavity 92, and then when the lead is finished and the normal covering extrusion operation is started, with the continuous advancement of the core 5, the airflow blown by the inclined flow channel 94 can further clean the core 5, thereby further improving the quality of the cable.

[0037] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are within the protection scope of the present application.

Claims

1. A radio frequency cable outer sheath extrusion molding processing device, comprising a core feeding assembly (1), an extrusion molding assembly (2), and a traction device, wherein the extrusion molding assembly (2) comprises an extruder (21) and a covering extrusion die (22), characterized in that: The core feeding assembly (1) is set at the input end of the covering extrusion die (22). The core feeding assembly (1) includes two sets of clamps (11). At the corresponding positions of the two sets of clamps (11), feeding tubes (12) are fixedly connected. The feeding tubes (12) are used to wrap the core (5). The clamp (11) is vertically slidably mounted on the movable seat (13), and the movable seat (13) is provided with a clamping driver (131), which is used to drive the clamp (11) to move vertically; The core feed assembly (1) further includes a lateral sliding support assembly (132), which is used to support the lateral sliding of the movable seat (13); The traction device is used to fix the front end of the core (5) inserted into the coating extrusion die (22) and to pull the core (5) so that the core (5) is taut in the coating extrusion die (22).

2. The extrusion molding apparatus for radio frequency cable outer sheaths according to claim 1, characterized in that: A sealing tube (14) is provided on the side of the clamp (11) away from the covering extrusion die (22). A semi-circular sealing structure (142) is provided on the inner side of the sealing tube (14). A sealing structure is provided at the contact part of the two sets of feed tubes (12). A plug (15) is also provided at the front end of the feed tube (12). The plug (15) is used to be inserted into the front end of the circular tube structure formed after the two sets of feed tubes (12) come into contact. A fluid connection tube (141) is also provided on the sealing tube (14). The fluid connection tube (141) is connected to the air extraction equipment through a pipe.

3. The extrusion molding apparatus for radio frequency cable outer sheaths according to claim 2, characterized in that: The clamp (11) is rotatably mounted with a drive roller (111). The drive roller (111) is adapted to the wire core (5). The drive roller (111) is driven to rotate by a rotary driver. After the two sets of feed tubes (12) come into contact with each other, the two sets of drive rollers (111) squeeze the wire core (5).

4. The extrusion molding apparatus for radio frequency cable outer sheaths according to claim 3, characterized in that: The sealing pipe (14) is provided with at least two sets of fluid connection pipes (141), and another set of fluid connection pipes (141) is also connected to a cryogenic fluid supply assembly, which includes a delivery pump for delivering cryogenic fluid to the inside of the feed tube (12).

5. The extrusion molding apparatus for radio frequency cable outer sheaths according to claim 4, characterized in that: Multiple overflow holes (121) are provided on the side wall near the front end of the feed tube (12). An elastic sheet (122) is attached to the outside of the overflow hole (121). The rear end of the elastic sheet (122) is fixedly connected to the surface of the feed tube (12) to form a one-way valve assembly.

6. The extrusion molding apparatus for radio frequency cable outer sheaths according to claim 5, characterized in that: An isolation coating component (8) is also provided between the clamp (11) and the coating extrusion mold (22). The isolation coating component (8) includes a first pair of pipe shells (81). The first pair of pipe shells (81) is movably disposed between the coating extrusion mold (22) and the clamp (11). The isolation coating component (8) is provided with a through hole coaxially corresponding to the forming cavity of the coating extrusion mold (22). The first pair of pipe shells (81) is provided with a receiving cavity (82). The receiving cavity (82) stores an isolation material. The receiving cavity (82) is provided with a docking hole (84) at the position corresponding to the through hole.

7. The extrusion molding apparatus for radio frequency cable outer sheaths according to claim 6, characterized in that: The isolation material is water, the accommodating cavity (82) is connected to a water supply pipe, the water supply pipe is connected to a water supply pump, the water supply pipe is used to replenish water to the accommodating cavity (82), and a sponge structure is provided in the docking hole (84).

8. The extrusion molding apparatus for radio frequency cable outer sheaths according to claim 7, characterized in that: A sliding tube (83) is also provided between the first pair of tube shells (81) and the feed tube (12). The sliding tube (83) is slidably fitted on the outside of the feed tube (12). The sliding tube (83) is also provided with a docking hole (84) at the position corresponding to the docking hole (84) of the accommodating cavity (82). The sliding tube (83) is slidably installed in the through hole of the first pair of tube shells (81). A scraper part (831) is provided at the end of the sliding tube (83) away from the covering extrusion mold (22). The scraper part (831) is in contact with the surface of the feed tube (12) and has damping.

9. The extrusion molding apparatus for radio frequency cable outer sheaths according to claim 8, characterized in that: An air blowing anti-backflow component (9) is also provided between the isolation coating component (8) and the coating extrusion die (22). The air blowing anti-backflow component (9) includes a second pair of pipe shells (91). The second pair of pipe shells (91) is slidably disposed in the area between the clamp (11) and the coating extrusion die (22). An air guiding cavity (92) is provided inside the second pair of pipe shells (91). An air blowing pipe (93) is connected to the air guiding cavity (92). An air blowing pipe (93) is connected to an air blowing pump. The second pair of pipe shells (91) is provided with corresponding sealing structures at the positions corresponding to the coating extrusion die (22) and the positions corresponding to the first pair of pipe shells (81). An inclined flow channel (94) is also provided inside the first pair of pipe shells (81) in the direction away from the coating extrusion die (22). The inclined flow channel (94) is connected to the air guiding cavity (92).

10. A radio frequency cable outer sheath extrusion molding processing apparatus according to any one of claims 1-9, characterized in that: The traction device includes a bundling structure (7), which bundles the front end of the wire core (5). The bundling structure (7) is connected to the winding drum on the cable winding equipment. The winding equipment drives the rotation of the winding drum to form a traction on the bundling structure (7) and the wire core (5).

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