High-speed armored cable metal band forming die water cooling system

Abstract

The application discloses a high-speed armored optical cable metal band forming die water cooling system, which comprises a water cooling machine main body, a first water cooling assembly, a second water cooling assembly and a third water cooling assembly. The first water cooling assembly comprises a first water inlet pipe, a first water cooling die sleeve and a first water outlet pipe. The first water cooling die sleeve is provided with a first inner hole for sleeving a sizing die, so as to cool the sizing die. The second water cooling assembly comprises a second water inlet pipe, a second water cooling die sleeve and a second water outlet pipe. The first water cooling die sleeve is provided with a second inner hole for sleeving a pressing die, so as to cool the pressing die. The third water cooling assembly comprises a third water cooling die sleeve and a third water outlet pipe. The third water cooling die sleeve is provided with a third inner hole for sleeving a preforming die, so as to cool the preforming die. The application can reduce the temperature of the preforming die, the pressing die and the sizing die through the water cooling system, so that the film layer of the metal band does not peel off, and the breakage, spark breakdown and bulging faults can be prevented.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of armored cable production equipment, more particularly, to a water cooling system for a high-speed armored cable metal strip forming die. BACKGROUND

[0002] Armored cable is a protective "armor" wrapped around the outside of the optical fiber, mainly used to meet the requirements of rat bite, moisture resistance, etc. Armored cable has important applications in long-distance optical fiber transmission lines, primary and secondary trunk transmission, and is widely promoted due to its excellent protective performance.

[0003] With the rapid development of the optical communication industry, the production efficiency and capacity of armored cable have been difficult to meet the growing demand of customers. The existing production speed has become a bottleneck restricting the efficient and stable production of armored cable.

[0004] The metal strip forming process is completed by four sets of dies on the forming table, including a preforming block 100, a preforming die 200, a pressing die 300, and a sizing die 400. The metal strip 500 and the semi-finished cable core 600 pass through the preforming block, the preforming die, the pressing die, and the sizing die in sequence. The four sets of dies function to shape the flat metal strip (such as steel strip or aluminum strip) into a tubular longitudinal wrapping armored on the semi-finished cable core. After the semi-finished cable core with longitudinal wrapping metal strip passes through the extruder 700, the plastic (such as PE material) extruded by the extruder 700 is wrapped on the surface of the metal strip 500.

[0005] Referring to FIG. 2a, the original state of the metal strip 200 before entering the preforming block is flat. Referring to FIG. 2b, the metal strip 200 is slightly raised on both edges after passing through the preforming block, completing the first step of preforming. Referring to FIG. 2c, the metal strip 200 enters the preforming die and continues the preforming action, presenting a "C" shape rotated counterclockwise by 90 degrees, completing the second step. Referring to FIG. 2d, when the metal strip 200 enters the pressing die, the upper opening gradually closes, and at this time, the metal strip 200 appears partially overlapped, but the upper half of the overlapping part is slightly raised, completing the third step of forming. Referring to FIG. 2e, when the metal strip 200 enters the sizing die, the slight upward of the upper half of the overlapping part is gradually flattened. At the outlet of the sizing die, the metal strip 200 presents a complete cylindrical tube wrapped around the semi-finished cable core, playing a role of armored protection for the cable core.

[0006] Because the metal strip generates relative friction with the mold when passing through the shaping mold, heat is generated. Chinese patent CN213671489U cools the longitudinal wrapping mold with water. However, the heat dissipation efficiency of such a mold is low. For a high-speed armored optical cable production line with a production speed of no less than 150 m / min, the mold temperature rises very quickly in unit time due to the high production line speed. Too high a mold temperature can easily damage the coating layer on the surface of the metal strip, causing part of the coating layer to adhere to the inner wall of the mold and the other part to be taken into the mold core of the extruder with the metal strip, which can easily cause spark breakdown or bulging failure in the sheath. SUMMARY

[0007] In view of the above defects or improvement needs of the prior art, the present application provides a high-speed armored optical cable metal strip forming mold water cooling system which can efficiently cool the mold used for metal strip forming and prevent the problems of spark breakdown or bulging of the sheath.

[0008] To achieve the above-mentioned purpose, according to one aspect of the present application, a high-speed armored optical cable metal strip forming mold water cooling system is provided, comprising a water cooling machine main body, a first water cooling assembly, a second water cooling assembly and a third water cooling assembly, wherein:

[0009] The first water cooling assembly comprises a first water inlet pipe, a first water cooling mold sleeve and a first water outlet pipe, the water cooling machine main body is connected to the first water inlet pipe, the first water cooling mold sleeve is provided with a first cooling water flow channel, the inlet and outlet of the first cooling water flow channel are connected to the first water inlet pipe and the first water outlet pipe respectively, and the first water cooling mold sleeve has a first inner hole for sleeving a sizing mold for cooling the sizing mold so that the temperature of the sizing mold is lower than the peeling-off temperature of the surface coating layer of the metal strip;

[0010] The second water cooling assembly comprises a second water inlet pipe, a second water cooling mold sleeve and a second water outlet pipe, the water cooling machine main body is connected to the second water inlet pipe and the second water outlet pipe respectively, the second water cooling mold sleeve is provided with a second cooling water flow channel, the inlet and outlet of the second cooling water flow channel are connected to the second water inlet pipe and the second water outlet pipe respectively, and the first water cooling mold sleeve has a second inner hole for sleeving a pressing mold for cooling the pressing mold so that the temperature of the pressing mold is lower than the peeling-off temperature of the surface coating layer of the metal strip;

[0011] The third water cooling assembly comprises a third water cooling mold sleeve and a third water outlet pipe, the water cooling machine main body is connected to the third water outlet pipe, the third water cooling mold sleeve is provided with a third cooling water flow channel, the inlet and outlet of the third cooling water flow channel are connected to the first water outlet pipe and the third water outlet pipe respectively, and the third water cooling mold sleeve has a third inner hole for sleeving a pre-forming mold for cooling the pre-forming mold so that the temperature of the pre-forming mold is lower than the peeling-off temperature of the surface coating layer of the metal strip.

[0012] Preferably, the preforming die is used to form the metal strip into a "C" shape.

[0013] Preferably, the compression die is used to close the metal strip formed into a "C" shape.

[0014] Preferably, the sizing die is used to form the closed metal strip into a cylindrical tube.

[0015] Preferably, the first water-cooled die sleeve, the second water-cooled die sleeve and the third water-cooled die sleeve are coaxially arranged.

[0016] Preferably, the controller of the water-cooled machine body can set and adjust the water temperature.

[0017] Preferably, the water tank of the water-cooled machine body has a water level sensor to alarm when the water level is insufficient.

[0018] Overall, compared with the prior art, the above technical solutions conceived by the present application can achieve the following beneficial effects:

[0019] 1) The present application is directed to the heating characteristics of the preforming die, the compression die and the sizing die, and reduces the temperature of the preforming die, the compression die and the sizing die through the water cooling system, so that the film layer of the metal strip does not peel off, and the faults of broken strip, spark breakdown and bulging can be prevented.

[0020] 2) The present application uses separate water inlet pipe and water outlet pipe for water cooling circulation for the compression die with higher temperature, and the water outlet of the sizing die can be used by the preforming die, which can effectively save water resources. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a schematic diagram of a production line for metal strip forming in the prior art;

[0022] Figs. 2a-2e are schematic diagrams of the metal strip before entering the preforming block, after the preforming block is formed, after the preforming die is formed, after the compression die is formed and after the sizing die is formed in the prior art, respectively;

[0023] Figure 3 is a schematic diagram of the present application. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application. In addition, the technical features involved in each embodiment of the present application described below can be combined with each other as long as they do not conflict with each other.

[0025] The metal band forming die to sheath coating process is as follows: referring to Fig. 2a, the original state of the metal band 200 before entering the preforming block is flat, referring to Fig. 2b, the metal band 200 is slightly upturned at the left and right edges after passing through the preforming block, completing the first step of preforming; referring to Fig. 2c, the metal band 200 enters the preforming die, and the preforming action continues, showing a "C" shape rotated 90 degrees counterclockwise, completing the second step; referring to Fig. 2d, when the metal band 200 enters the compression die, the upper opening gradually closes, at this time the metal band 200 appears partially overlapped, but the upper half of the overlapped part is slightly upturned, completing the third step of forming; referring to Fig. 2e, when the metal band 200 enters the sizing die, the slight upturn of the upper half of the overlapped part is gradually flattened, and at the outlet of the sizing die, the metal band 200 shows a complete cylindrical pipe wrapped around the semi-finished cable core, playing a role of armored protection for the cable core.

[0026] In order to improve the cooling efficiency, it is necessary to observe the concentrated area of heat generation and strengthen the heat dissipation accordingly. The mold temperatures of each process under high-speed state are measured, wherein the temperature of the preforming block 100 is t1, the temperature of the preforming die 200 is t2, the temperature of the compression die 300 is t3, and the temperature of the sizing die 400 is t4. The temperature order of each module in the forming process is t3>t4>t2>t1; wherein in the continuous high-speed production process, the temperature t1 is much lower than the stripping and falling temperature T0 of the metal band coating layer material, and the temperatures t2, t3 and t4 are all higher than the stripping and falling temperature T0 of the metal band coating layer material.

[0027] In view of the above heat distribution condition of the longitudinal wrapping shaping die, the application provides a high-speed armored optical cable metal band forming die water cooling system, referring to Figure 3 , comprising a water cooling machine main body 1, a first water cooling assembly, a second water cooling assembly and a third water cooling assembly, wherein:

[0028] The first water cooling assembly comprises a first water inlet pipe 2, a first water cooling die sleeve 3 and a first water outlet pipe 4, the first cold water outlet 11 of the water cooling machine main body 1 is connected to the first water inlet pipe 2 to deliver cold water to the first water inlet pipe 2, the first water cooling die sleeve 3 is provided with a first cooling water flow channel, the inlet and outlet of the first cooling water flow channel are respectively connected to the first water inlet pipe 2 and the first water outlet pipe 4, and the cooling water flow channel discharges hot water after water cooling of the first water cooling die sleeve 3 through the first water outlet pipe 4, the first water cooling die sleeve 3 has a first inner hole for sleeving the sizing die to cool the sizing die, so that the temperature of the sizing die is lower than the stripping and falling temperature of the metal band surface coating layer, and the sizing die is used to form the closed metal band into a cylindrical pipe;

[0029] The second water cooling assembly comprises a second water inlet pipe 5, a second water cooling sleeve 6 and a second water outlet pipe 7, the second water inlet pipe 5 and the second water outlet pipe 7 are connected to the second cold water outlet 12 and the first hot water inlet 13 of the water cooler body 1 respectively, the second water inlet pipe 5 transports the cold water into the water cooler body 1, and the second water outlet pipe 7 discharges the hot water into the water cooler body 1 for cooling again to form circulating water. The second water cooling sleeve 6 is provided with a second cooling water flow channel, the inlet and outlet of the second cooling water flow channel are connected to the second water inlet pipe 5 and the second water outlet pipe 7 respectively, and the first water cooling sleeve 3 has a second inner hole for sleeving a compression mold for cooling the compression mold so that the temperature of the compression mold is lower than the peeling-off temperature of the surface film layer of the metal strip.

[0030] The third water cooling assembly comprises a third water cooling sleeve 8 and a third water outlet pipe 9, the second hot water inlet 14 of the water cooler body 1 is connected to the third water outlet pipe 9, and the hot water discharged by the third water outlet pipe 9 flows back to the water cooler body 1 through the second hot water inlet 14. The third water cooling sleeve 8 is provided with a third cooling water flow channel, the inlet and outlet of the third cooling water flow channel are connected to the first water outlet pipe 4 and the third water outlet pipe 9 respectively, and the water discharged by the first water outlet pipe 4 is used for cooling the third water cooling sleeve 8 again. The third water cooling sleeve 8 has a third inner hole for sleeving a preforming mold for cooling the preforming mold so that the temperature of the preforming mold is lower than the peeling-off temperature of the surface film layer of the metal strip.

[0031] The preforming block, the preforming mold, the compression mold and the sizing die are used for forming the metal strip respectively, and belong to the prior art, which will not be described here.

[0032] The first water cooling sleeve 3, the second water cooling sleeve 6 and the third water cooling sleeve 8 are coaxially arranged, the controller of the water cooler body 1 can set and adjust the water temperature, and the water tank of the water cooler body 1 is provided with a water level sensor to alarm when the water level is insufficient.

[0033] If the water cooling system of the application is not arranged outside the mold, the temperatures of the preforming mold, the compression mold and the sizing die are t2, t3 and t4 respectively in the existing conventional forming, and the refrigerant, i.e. energy, is distributed according to the water cooling system designed in the application.

[0034] The application adjusts the temperatures of the preforming mold, the compression mold and the sizing die for the metal strip forming, efficiently reduces the temperatures of the preforming mold, the compression mold and the sizing die through water cooling circulation, prevents the peeling-off phenomenon of the double-sided plastic film layer of the metal strip, and prevents the faults of belt breakage, spark breakdown and bulging.

[0035] Wherein the preforming die, the compression die and the sizing die are installed in the corresponding water-cooled die sleeve, when the metal strip and the cable core are put into the preforming die, the compression die and the sizing die and move forward at high speed, the heat generated by the friction between the metal strip and the die is exchanged by the cold water injected into the cavity of the water-cooled die sleeve, the heated hot water is recycled into the water-cooled machine main body 1 through the pipeline, and is injected into the water-cooled die sleeve through the pipeline after being converted into cold water in the water-cooled machine main body 1.

[0036] The temperature of the compression die is relatively high, and a water-cooled circulation is used alone.

[0037] Since the temperature of the sizing die and the preforming die is lower than that of the compression die, a water-cooled circulation can be shared, the cold water is first connected to the inlet of the first water-cooled die sleeve 3 through the first water inlet pipe 2, the hot water at the outlet of the first water-cooled die sleeve 3 is connected to the inlet of the third water-cooled die sleeve 8 through the first water outlet pipe 4, and the hot water at the outlet of the third water-cooled die sleeve 8 is recycled into the water-cooled machine through the third water outlet pipe 9, and the above circulation is repeated after being cooled.

[0038] For the compression die, the cooling water basically comes from the water-cooled machine, the temperature is the lowest, and the heat dissipation capacity is the strongest; the hot water generated by the cooling of the compression die is mixed with the cold water, and is actively cooled by the water-cooled machine to cool the sizing die, which can meet the heat dissipation of the sizing die; the hot water generated by the cooling of the sizing die is directly used to cool the preforming die, so that the temperature of the preforming die does not exceed the requirement, and the finally generated hot water is actively cooled by the water-cooled machine, and is first used for the compression die.

[0039] Wherein the inlet pipe of the water inlet pipe is connected to the cold water outlet of the refrigeration machine, the outlet of the water outlet pipe is connected to the recovery port of the refrigeration machine, the refrigeration machine has the functions of water temperature setting and adjusting, water level alarm, and the like, so as to realize the cooling process temperature expected to be reached by the forming die.

[0040] Those skilled in the art can easily understand that the above description is only a preferred embodiment of the present application, and is not used to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A water-cooling system for a high-speed armored optical cable metal tape forming mold, characterized in that, It includes the main body of the water chiller, a first water cooling component, a second water cooling component, and a third water cooling component, wherein: The first water-cooling assembly includes a first water inlet pipe, a first water-cooling mold sleeve, and a first water outlet pipe. The main body of the water chiller is connected to the first water inlet pipe. The first water-cooling mold sleeve is provided with a first cooling water channel. The inlet and outlet of the first cooling water channel are respectively connected to the first water inlet pipe and the first water outlet pipe. The first water-cooling mold sleeve has a first inner hole for fitting the sizing mold to cool the sizing mold, thereby making the temperature of the sizing mold lower than the peeling and falling temperature of the coating layer on the surface of the metal strip. The second water-cooling assembly includes a second water inlet pipe, a second water-cooling mold sleeve, and a second water outlet pipe. The main body of the water chiller is connected to the second water inlet pipe and the second water outlet pipe respectively. The second water-cooling mold sleeve is provided with a second cooling water channel. The inlet and outlet of the second cooling water channel are connected to the second water inlet pipe and the second water outlet pipe respectively. The second water-cooling mold sleeve has a second inner hole for fitting the pressing mold to cool the pressing mold, so that the temperature of the pressing mold is lower than the peeling and falling temperature of the coating layer on the surface of the metal strip. The third water-cooling component includes a third water-cooling mold sleeve and a third water outlet pipe. The main body of the water chiller is connected to the third water outlet pipe. The third water-cooling mold sleeve is provided with a third cooling water channel. The inlet and outlet of the third cooling water channel are respectively connected to the first water outlet pipe and the third water outlet pipe. The third water-cooling mold sleeve has a third inner hole for fitting the preformed mold to cool the preformed mold, thereby making the temperature of the preformed mold lower than the peeling and falling temperature of the coating layer on the surface of the metal strip.

2. The water-cooling system for a high-speed armored optical cable metal tape forming mold according to claim 1, characterized in that, The preforming mold is used to shape the metal strip into a "C" shape.

3. The water-cooling system for a high-speed armored optical cable metal tape forming mold according to claim 1, characterized in that, The clamping die is used to close the metal strip that is shaped like a "C".

4. The water-cooling system for a high-speed armored optical cable metal tape forming mold according to claim 1, characterized in that, The sizing die is used to shape a closed metal strip into a cylindrical tube.

5. The water-cooling system for a high-speed armored optical cable metal tape forming mold according to claim 1, characterized in that, The first water-cooled mold sleeve, the second water-cooled mold sleeve, and the third water-cooled mold sleeve are coaxially arranged.

6. The water-cooling system for a high-speed armored optical cable metal tape forming mold according to claim 1, characterized in that, The controller of the main body of the water chiller can set and adjust the water temperature.

7. The water-cooling system for a high-speed armored optical cable metal tape forming mold according to claim 1, characterized in that, The water tank of the main body of the water chiller is equipped with a water level sensor to trigger an alarm when the water level is insufficient.

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