Heat dissipation and lubrication device for pressing die of power cable

Abstract

The invention relates to the technical field of power cable manufacturing, and discloses a power cable pressing die heat dissipation and lubrication device which comprises a pressing die cylinder. The fixing sleeve is in threaded connection to one side of the pressing mold cylinder, and a threaded groove is formed in the outer wall of the fixing sleeve and used for being connected to cable twisting equipment; and the fixed cylinder is fixedly connected to the other side of the pressing die cylinder. Through the arranged lubricating mechanism, lubricating oil can be evenly smeared on the outer wall of a cable, the lubricating oil can reduce the dynamic friction coefficient between molten plastic and the mold, surface scratches are reduced, the sharkskin phenomenon is eliminated, glossiness is improved, and the service life of the mold is prolonged; the cable straightening device can effectively straighten the cable and ensure that the cable is kept in a linear state before entering an injection molding pipe, so that injection molding stability is improved, and bending and twisting of the cable in the injection molding process are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of power cable manufacturing, and particularly to a heat dissipation and lubrication device for a compacting die of a power cable. Background Art

[0002] In the production process of power cables, a compacting die is a key device for achieving a tight fit between the cable insulation layer and the conductor layer. The compacting die tightly wraps the insulating material and the conductor material together through high temperature and high pressure to form a cable with excellent electrical and mechanical properties. However, there are some problems in the actual application of existing compacting dies, which limit the production efficiency and quality of cables.

[0003] During the injection molding process, lubricating oil needs to be evenly applied to the surface of the cable to reduce the friction between the molten plastic and the die, and improve the surface quality and gloss of the cable. However, existing lubrication systems often cannot ensure the uniform distribution of lubricating oil, resulting in scratches or "shark skin" phenomena on the cable surface, affecting the insulation performance and appearance of the cable. Therefore, a heat dissipation and lubrication device for a compacting die of a power cable is proposed to solve the above problems. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a heat dissipation and lubrication device for a compacting die of a power cable in view of the deficiencies in the above-mentioned prior art.

[0005] To solve the above technical problems, the technical solution adopted by the present invention is: A heat dissipation and lubrication device for a compacting die of a power cable, comprising: A compacting die cylinder; A fixed sleeve, threadedly connected to one side of the compacting die cylinder, and a thread groove is provided on the outer wall of the fixed sleeve for connection to a cable stranding device; A fixed cylinder, fixedly connected to the other side of the compacting die cylinder; An outlet cylinder, arranged on the inner wall of the fixed cylinder, and the fixed cylinder is used for installing the outlet cylinder for guiding the compacted cable; A heat dissipation mechanism, arranged on the outlet cylinder for cooling the cable after compacting; An injection molding pipe, arranged in the compacting die cylinder; A lubrication pipe, arranged inside the compacting die cylinder, forming a cavity with the injection molding pipe for accommodating injection molding materials; A wire guiding pipe, arranged in the compacting die cylinder, forming a cavity with the lubrication pipe for accommodating lubricating oil; The heat dissipation mechanism includes: A water pipe, arranged on the outer wall of the compacting die cylinder, and one end of the water pipe is connected to the outer wall of the outlet cylinder; A plurality of water outlet holes are respectively provided in the outlet barrel and are connected to the water pipe for spraying water to cool the cable after injection molding; The fixing seat is arranged on the inner wall of the compacting mold cylinder, and a spherical groove is opened inside the fixing seat. The middle part of the injection tube is spherically arranged and rotates in the spherical groove.

[0006] The adjustment component is arranged in the fixing cylinder and is used to adjust the deflection of the injection tube and the outlet angle.

[0007] Preferably, the adjustment component includes: A plurality of adjusting screws are connected to the outer wall of the fixed cylinder in a circular shape and are equally divided. The adjusting screws are sequentially threadedly connected to the inner walls of the fixed cylinder and the outlet cylinder to fix the outlet cylinder. A push rod is disposed in the threaded holes on the inner walls of the fixed cylinder and the outlet cylinder, and the bottom of the push rod movably passes through the outlet cylinder and extends through to fit the outer wall of the injection molding tube, so as to resist the deflection of the injection molding tube; The first spring is sleeved on the outer wall of the push rod and is used for pushing the push rod away from the injection molding tube.

[0008] Preferably, the outer wall of the compression mold barrel is provided with a plurality of injection holes, and the outer wall of the compression mold barrel is provided with connecting threads at the injection holes for connecting an injection tube; The inner wall of the compression mold cylinder is fixedly connected with a fixing ring, and the left side of the lubrication pipe is tapered and abuts against the fixing ring; The right side of the injection molding tube is tapered, and forms a cavity with the tapered part of the lubrication tube for accommodating the injection molding material, which enters the spherical inner cavity of the injection molding tube and is tightly pressed against the cable after exiting the lubrication tube by injection molding. A lubrication mechanism is provided between the lubrication tube and the wire tube for lubricating the cable.

[0009] Preferably, the lubrication mechanism includes: A plurality of oil pipes movably passing through the compacting die cylinder and the lubrication pipe for injecting oil between the lubrication pipe and the wire pipe; The second spring is sleeved on the outer wall of the oil pipe, and the outer wall of the oil pipe is connected to the outer wall of the pressing mold cylinder through a threaded sleeve.

[0010] Preferably, the lubrication mechanism further comprises: A spring three, one end of which is fixedly connected to the inner wall of the lubrication tube, and the other end of which is in contact with the outer wall of the wire tube; A plurality of conical arc plates are arranged on the inner wall of the lubrication tube at equal intervals in a circular shape and located on one side of the spring three, for scraping off excess lubricating oil on the outer wall of the cable; The connecting rod has two ends hinged to the outer wall of the conical arc plate and the inner wall of the lubrication pipe respectively.

[0011] Preferably, the outer wall of the wire tube fits with the outer wall of the conical arc plate, so as to prevent the conical arc plate from deflecting and contacting the outer wall of the cable.

[0012] Preferably, the inner wall of the wire tube is provided with a wire guide mechanism for straightening the cable; The wire mechanism comprises: a plurality of fixing rods, circumferentially and equally connected to the inner wall of the wire tube; A connecting sleeve is sleeved on the outer wall of the fixing rod, and a spring 4 is provided on the inner wall of the connecting sleeve for pushing the connecting sleeve away from the fixing rod; The roller is rotatably connected to the side of the connecting sleeve away from the fixing rod, and the roller is in contact with the outer wall of the cable and is used for rolling to straighten the cable.

[0013] Preferably, both ends of the lubrication pipe are respectively abutted and fixed between the fixing ring and the fixing sleeve; The wire tube is movably connected to the inner wall of the lubricating tube, and the right side of the wire tube is in contact with the fixing sleeve.

[0014] The present invention adopts the above technical solution, which can bring the following beneficial effects: 1. The power cable's compression mold heat dissipation and lubrication device utilizes a lubrication mechanism, oil pipes, springs, and tapered arc plates to evenly apply lubricant to the cable's outer wall. This lubricant reduces the dynamic friction coefficient between the molten plastic and the mold, reducing surface scratches, eliminating the "sharkskin" effect, improving gloss, and extending the mold's service life. Simultaneously, the conductor mechanism, through its fixed rod, connecting sleeve, and roller design, effectively straightens the cable, ensuring it remains straight before entering the injection molding tube. This not only improves injection molding stability but also reduces bending and twisting of the cable during the process.

[0015] 2. The heat dissipation and lubrication device of the compacting mold of the power cable can dynamically adjust the deflection angle of the injection molding tube and optimize the adhesion effect of the injection molding material through the setting of the adjustment component and the design of the adjustment screw, push rod and spring. This design can be flexibly adjusted according to the diameter and shape of the cable to ensure that the injection molding material is evenly distributed. The conical arc plate in the lubrication mechanism can scrape off excess lubricating oil during the movement of the cable to ensure that the lubricating oil is evenly distributed. At the same time, the conical arc plate can further straighten the cable and improve the stability of the injection molding.

[0016] 3. The power cable's compression mold heat dissipation and lubrication device ensures uniform distribution of lubricating oil and injection molding material through the synergistic effect of the lubrication mechanism and the conductor mechanism, thereby improving the quality and consistency of cable injection molding. The use of lubricating oil reduces the friction between the molten plastic and the mold, avoids surface scratches and "shark skin" phenomenon, and improves the surface quality and gloss of the cable. Brief Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic sectional structural diagram of the present invention; Figure 3 is for the present invention Figure 2 enlarged schematic structural diagram at position A in; Figure 4 is an exploded schematic structural diagram of the present invention; Figure 5 is a schematic sectional structural diagram of the compacting die barrel of the present invention; Figure 6 is for the present invention Figure 5 enlarged schematic structural diagram at position B in; Figure 7 is a schematic sectional structural diagram of the lubricating pipe of the present invention; Figure 8 is a schematic sectional structural diagram of the wire conduit of the present invention.

[0018] In the figure: 1. Compacting die barrel; 2. Fixed sleeve; 3. Fixed cylinder; 4. Outlet cylinder; 5. Heat dissipation mechanism; 51. Water pipe; 511. Water outlet hole; 52. Adjusting component; 53. Fixed seat; 521. Adjusting screw; 522. Push rod; 523. First spring; 6. Injection pipe; 7. Lubricating pipe; 71. Fixed ring; 8. Wire conduit; 9. Lubricating mechanism; 91. Oil pipe; 92. Second spring; 93. Threaded sleeve; 94. Third spring; 95. Conical arc plate; 96. Connecting rod; 10. Wire mechanism; 101. Fixed rod; 102. Connecting sleeve; 103. Fourth spring; 104. Roller; 11. Injection hole. Detailed Description of the Invention

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] Please refer to Figure 1-8 , an embodiment of the present invention is: A heat dissipation and lubrication device for a compacting die of a power cable, including: Compacting die barrel 1; Fixed sleeve 2, threadedly connected to one side of the compacting die barrel 1, and a thread groove is provided on the outer wall of the fixed sleeve 2 for connection to a cable stranding device; Fixed cylinder 3, fixedly connected to the other side of the compacting die barrel 1; The outlet barrel 4 is arranged on the inner wall of the fixed barrel 3. The fixed barrel 3 is used to install the outlet barrel 4 and is used to guide the compressed cable; The heat dissipation mechanism 5 is provided on the outlet barrel 4 and is used to cool the cable after being compressed; The injection tube 6 is arranged in the compacting mold cylinder 1; The lubrication tube 7 is arranged inside the compacting mold cylinder 1 and forms a cavity with the injection tube 6 to accommodate the injection material; The wire tube 8 is arranged in the compacting die cylinder 1 and forms a cavity between the wire tube and the lubricating tube 7 to contain lubricating oil; The heat dissipation mechanism 5 includes: A water pipe 51 is provided on the outer wall of the pressing mold cylinder 1, and one end of the water pipe 51 is connected to the outer wall of the outlet cylinder 4; Multiple water outlet holes 511 are respectively provided in the outlet barrel 4 and are connected to the water pipe 51 for spraying water to cool the cable after injection molding in the injection molding tube 6; The fixing seat 53 is provided on the inner wall of the compacting mold cylinder 1, and a spherical groove is provided inside the fixing seat 53. The middle part of the injection tube 6 is spherically provided and rotates in the spherical groove. The adjustment component 52 is disposed in the fixed cylinder 3 and is used to adjust the deflection of the injection tube 6 and adjust the outlet angle.

[0021] The adjustment assembly 52 includes: A plurality of adjusting screws 521 are connected to the outer wall of the fixed cylinder 3 in a circular shape and are equally divided. The adjusting screws 521 are sequentially threadedly connected to the inner walls of the fixed cylinder 3 and the outlet cylinder 4 to fix the outlet cylinder 4. The push rod 522 is disposed in the threaded holes on the inner walls of the fixed cylinder 3 and the outlet cylinder 4, and the bottom of the push rod 522 movably passes through the outlet cylinder 4 and extends through and fits against the outer wall of the injection tube 6, so as to resist the deflection of the injection tube 6; Spring 1 523 is sleeved on the outer wall of the push rod 522 and is used to push the push rod 522 away from the injection tube 6.

[0022] The outer wall of the compression mold barrel 1 is provided with a plurality of injection holes 11, and the outer wall of the compression mold barrel 1 is provided with connecting threads at the injection holes 11 for connecting the injection tube 6; A fixing ring 71 is fixedly connected to the inner wall of the compression mold cylinder 1, and the left side of the lubrication pipe 7 is tapered and contacts the fixing ring 71; The right side of the injection molding tube 6 is tapered, and forms a cavity with the tapered part of the lubrication tube 7 to accommodate the injection molding material, which enters the spherical inner cavity of the injection molding tube 6 and is tightly pressed against the cable after it exits the lubrication tube 7 by injection molding. A lubrication mechanism 9 is provided between the lubrication tube 7 and the wire tube 8 for lubricating the cable.

[0023] The lubrication mechanism 9 comprises: Multiple oil pipes 91 penetrate the compression die barrel 1 and the lubricating pipe 7 movably, and are used to inject oil between the lubricating pipe 7 and the wire pipe 8; The second spring 92 is sleeved on the outer wall of the oil pipe 91, and the outer wall of the oil pipe 91 is connected to the outer wall of the compression die barrel 1 through a threaded sleeve 93.

[0024] The lubricating mechanism 9 further includes: The third spring 94 has one end fixedly connected to the inner wall of the lubricating pipe 7, and the other end of the third spring 94 is in contact with the outer wall of the wire pipe 8; Multiple conical arc plates 95 are arranged at equal intervals in a circumferential shape on the inner wall of the lubricating pipe 7 and are located on one side of the third spring 94, and are used to scrape off the excess lubricating oil on the outer wall of the cable; The connecting rod 96 is hinged to the outer wall of the conical arc plate 95 and the inner wall of the lubricating pipe 7 at both ends respectively.

[0025] The outer wall of the wire pipe 8 is in contact with the outer wall of the conical arc plate 95, and is used to push the conical arc plate 95 to deflect and contact the outer wall of the cable.

[0026] A wire mechanism 10 is arranged on the inner wall of the wire pipe 8 and is used to straighten the cable; The wire mechanism 10 includes: Multiple fixing rods 101 are connected to the inner wall of the wire pipe 8 in a circumferential and equally divided manner; The connecting sleeve 102 is sleeved on the outer wall of the fixing rod 101, and a fourth spring 103 is arranged on the inner wall of the connecting sleeve 102 and is used to push the connecting sleeve 102 away from the fixing rod 101; The roller 104 is rotatably connected to the side of the connecting sleeve 102 away from the fixing rod 101, and the roller 104 is in contact with the outer wall of the cable and is used to roll and straighten the cable.

[0027] Both ends of the lubricating pipe 7 are respectively in contact with and fixed between the fixing ring 71 and the fixing sleeve 2; The wire pipe 8 is movably connected to the inner wall of the lubricating pipe 7, and the right side of the wire pipe 8 is in contact with the fixing sleeve 2.

[0028] Working principle: When injecting and wrapping the insulating material around the cable, the cable is directly placed into the fixing sleeve 2 and successively passes through the wire pipe 8, the lubricating pipe 8, and the injection pipe 6, and then passes out through the wire outlet cylinder 4, so as to inject the cable. When injecting the cable, when the cable passes through the wire pipe 8, it will be squeezed by the connecting sleeve 102 and the roller 104 pushed by the fourth spring 103, so as to roll and straighten the cable wire after being unreeled from the unreeling cylinder of the unreeling device, so as to facilitate its penetration into the tapered part of the wire pipe 8; Furthermore, when the straightened cable enters the tapered portion of the conduit 8 and the cavity between the lubricating tube 7, the lubricating oil injected through the oil pipe 91 will adhere to the outer wall of the cable conductor, so that the cable can adhere to the outer wall of the cable conductor during injection molding, thereby reducing the dynamic friction coefficient between the molten plastic and the mold during injection molding, reducing surface scratches, and eliminating the "shark skin" phenomenon, that is, the irregular lines caused by melt fracture, and improving the glossiness and extending the service life of the mold. At this time, the cable conductor inevitably has some bends. At this time, during the movement, it will rub against the inner wall of the conduit 8, thereby driving the conduit 8 to move to the left. During the movement, multiple conical arc plates 95 will be squeezed, causing the conical arc plates 95 to open, so that one side of the conical arc plates 95 is closely attached to the surface of the cable conductor. At this time, the excess lubricant on the surface of the cable conductor can be scraped off, and at the same time, the conical slide plate 95 can be used to straighten the cable conductor again, thereby improving the stability of the cable during injection molding. Furthermore, after the cable conductor enters the tapered part of the lubrication tube 7, the cable conductor will contact the inner wall of the lubrication tube 7, so that the lubricating oil on the outer wall of the cable conductor can be scraped off again and evenly distributed. At the same time, when the cable enters the injection tube 6, it contacts the molten plastic entering the injection hole 11 and achieves the effect of injection molding. In the process of movement of the cable conductor, the attached plastic will be pulled to move, and the water introduced by the water pipe 51 will be sprayed onto the end surface of the injection tube 6 through the water outlet 511, so as to cool it down, thereby assisting the rapid molding of the injection molding material on the outer wall of the cable conductor. At the same time, during the injection molding process, the adjusting screw 521 can be rotated. At this time, the adjusting screw 521 will push the injection molding tube 6 to deflect, and rotate the adjusting screw 521 in the opposite direction. Under the spring 1 523, it no longer conflicts with the injection molding tube 6, thereby adjusting the deflection angle of the injection molding tube 6, thereby adjusting the deflection angle during discharge, and adjusting the uneven adhesion of the material during injection molding, further improving the injection molding effect.

[0029] The present invention provides a heat dissipation and lubrication device for a compression die of a power cable. There are numerous methods and approaches for implementing this technical solution. The foregoing description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also within the scope of protection of the present invention. Components not specified in this embodiment may be implemented using existing technologies.

Claims

1. A heat dissipation and lubrication device for a compacting die of a power cable, characterized in that, include: Compressing the mold cylinder (1); A fixing sleeve (2) is threadedly connected to one side of the pressing mold cylinder (1), and a threaded groove is provided on the outer wall of the fixing sleeve (2) for connection to a cable twisting device; A fixed cylinder (3) fixedly connected to the other side of the pressing mold cylinder (1); An outlet barrel (4) is arranged on the inner wall of the fixed barrel (3), and the fixed barrel (3) is used to install the outlet barrel (4) and is used to guide the cable after being compressed; A heat dissipation mechanism (5) is provided on the outlet barrel (4) and is used to cool the cable that is compressed and then outlet; An injection tube (6) is arranged in the compression mold cylinder (1); A lubricating tube (7) is arranged inside the compacting mold cylinder (1) and forms a cavity between the lubricating tube (7) and the injection tube (6) to accommodate the injection material; A wire tube (8) is arranged in the pressing mold cylinder (1) and forms a cavity between the wire tube and the lubrication tube (7) to accommodate lubricating oil; The heat dissipation mechanism (5) comprises: A water pipe (51) is provided on the outer wall of the pressing mold barrel (1), and one end of the water pipe (51) is connected to the outer wall of the outlet barrel (4); A plurality of water outlet holes (511) are respectively provided in the outlet barrel (4) and are connected to the water pipe (51) for spraying water to cool the cable after injection molding of the injection molding tube (6); A fixed seat (53) is arranged on the inner wall of the compacting mold cylinder (1), and a spherical groove is provided inside the fixed seat (53). The middle part of the injection tube (6) is spherically arranged and rotates in the spherical groove. An adjustment component (52) is disposed in the fixed cylinder (3) and is used to adjust the deflection of the injection tube (6) and adjust the outlet angle.

2. The heat dissipation and lubrication device for the compacting die of a power cable according to claim 1, characterized in that: The regulating assembly (52) comprises: A plurality of adjusting screws (521) are connected to the outer wall of the fixed cylinder (3) in a circular shape and are equally spaced, and the adjusting screws (521) are sequentially threadedly connected to the inner walls of the fixed cylinder (3) and the outlet cylinder (4) for fixing the outlet cylinder (4); A push rod (522) is disposed in threaded holes on the inner walls of the fixed cylinder (3) and the outlet cylinder (4), and the bottom of the push rod (522) movably passes through the outlet cylinder (4) and extends through the outlet cylinder (4) to fit the outer wall of the injection molding tube (6) to resist the deflection of the injection molding tube (6); Spring 1 (523) is sleeved on the outer wall of the push rod (522) and is used to push the push rod (522) away from the injection tube (6).

3. The heat dissipation and lubrication device for the compacting die of a power cable according to claim 2, characterized in that: The outer wall of the compression mold barrel (1) is provided with a plurality of injection holes (11), and the outer wall of the compression mold barrel (1) is provided with connecting threads at the injection holes (11) for connecting to the injection tube (6); A fixing ring (71) is fixedly connected to the inner wall of the compression mold cylinder (1), and the left side of the lubrication pipe (7) is conically arranged and abuts against the fixing ring (71); The right side of the injection molding tube (6) is tapered, and forms a cavity with the tapered portion of the lubrication tube (7) for accommodating the injection molding material, which enters the spherical inner cavity of the injection molding tube (6) and is tightly pressed against the cable after exiting the lubrication tube (7) by injection molding. A lubrication mechanism (9) is provided between the lubrication tube (7) and the wire tube (8) for lubricating the cable.

4. The heat dissipation and lubrication device for the compacting die of a power cable according to claim 3, characterized in that: The lubricating mechanism (9) comprises: A plurality of oil pipes (91) movably passing through the compacting mold cylinder (1) and the lubricating pipe (7) for injecting oil between the lubricating pipe (7) and the wire pipe (8); The second spring (92) is sleeved on the outer wall of the oil pipe (91), and the outer wall of the oil pipe (91) is connected to the outer wall of the pressing mold cylinder (1) through a threaded sleeve (93).

5. The heat dissipation and lubrication device for the compacting die of a power cable according to claim 4, wherein: The lubricating mechanism (9) further comprises: Spring three (94), one end of which is fixedly connected to the inner wall of the lubricating tube (7), and the other end of the spring three (94) is in contact with the outer wall of the wire tube (8); A plurality of conical arc plates (95) are arranged at equal intervals on the inner wall of the lubricating tube (7) in a circular shape and located on one side of the spring three (94) for scraping off excess lubricating oil on the outer wall of the cable; The connecting rod (96) has two ends hingedly connected to the outer wall of the conical arc plate (95) and the inner wall of the lubrication pipe (7).

6. The heat dissipation and lubrication device for the compacting die of a power cable according to claim 5, characterized in that: The outer wall of the wire tube (8) is fitted with the outer wall of the conical arc plate (95) and is used to resist the conical arc plate (95) and deflect to resist the outer wall of the cable.

7. A heat dissipation and lubrication device for a compacting die of a power cable according to claim 6, characterized in that: The inner wall of the wire tube (8) is provided with a wire mechanism (10) for straightening the cable; The guide wire mechanism (10) comprises: A plurality of fixing rods (101) are circumferentially and equally connected to the inner wall of the wire tube (8); A connecting sleeve (102) is sleeved on the outer wall of the fixing rod (101), and a spring (103) is provided on the inner wall of the connecting sleeve (102) for pushing the connecting sleeve (102) away from the fixing rod (101); The roller (104) is rotatably connected to a side of the connecting sleeve (102) away from the fixing rod (101), and the roller (104) is in contact with the outer wall of the cable and is used for rolling and straightening the cable.

8. The heat dissipation and lubrication device for the compacting die of a power cable according to claim 7, characterized in that: The two ends of the lubricating pipe (7) are respectively abutted between the fixing ring (71) and the fixing sleeve (2) and fixed; The wire tube (8) is movably connected to the inner wall of the lubricating tube (7), and the right side of the wire tube (8) is in contact with the fixing sleeve (2).

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