Vulcanizing mold of anti-shaking fixing device and operation method of vulcanizing mold

Abstract

The invention discloses a cable fixing technology, and aims to provide a vulcanization mold of an anti-shaking fixing device and an operation method thereof, and the technical scheme is characterized in that the vulcanization mold comprises a mold main body which is composed of an upper mold and a lower mold, and the upper mold and the lower mold are rapidly separated and assembled through a detachable connection structure; the tail clamp structure comprises a front-end upper cover plate and a front-end lower cover plate, the front-end lower cover plate is fixed with the front end of a lower die in the die main body through a long bolt, and the front-end upper cover plate is in transition fit with the front-end lower cover plate through an inner hexagon screw and is used for adapting to cables with different diameters and ensuring the stability in the vulcanization process; the branch fixing device comprises a rear-end upper cover plate and a rear-end lower cover plate, the rear-end lower cover plate is fixed with the rear end of the lower die in the die main body through a long bolt, the rear-end upper cover plate is in transition fit with the rear-end lower cover plate through an inner hexagon screw, and the rear-end upper cover plate is used for fixing the branch part welded with the main cable and uniformly distributing mechanical stress. The invention is suitable for the technical field of cable fixation.

Description

Technical Field

[0001] The present invention relates to a cable fixing technology, and more specifically, to a vulcanization mold of an anti-sway fixing device and an operating method thereof. Background Art

[0002] In fiber-optic communication systems, composite cables containing optical fibers require extremely high signal integrity and stability when transmitting data. In order to achieve long-distance transmission and network expansion, it is often necessary to branch the cables, that is, to distribute the signal of the trunk cable to multiple sub-lines. This process usually needs to be carried out under specific process conditions to ensure the reliability and optical performance of the connection points. Vulcanization is a commonly used method for curing thermosetting materials and is widely used in cable splicing and branching. During the vulcanization process, rubber or other thermosetting materials undergo chemical cross-linking reactions by heating to form a solid sealing structure, thereby providing good mechanical strength and environmental protection performance. During the branch vulcanization process, it is critical to ensure the precise alignment of each optical fiber. Any slight deviation may cause signal attenuation or even interruption. Then, during the vulcanization process, the cables and optical fibers will be affected by thermal and mechanical stress. If the stress is too large, it may cause the optical fiber to break or slightly bend, thereby affecting the signal transmission quality. Summary of the invention

[0003] In view of the deficiencies in the prior art, an object of the present invention is to provide a vulcanization mold of an anti-sway fixing device and an operating method thereof.

[0004] To achieve the above object, the present invention provides the following technical solution: a vulcanization mold of an anti-sway fixing device, comprising:

[0005] The mold body is composed of an upper mold and a lower mold, and the upper mold and the lower mold are quickly separated and assembled through a detachable connection structure;

[0006] The tail clamp structure includes a front upper cover plate and a front lower cover plate. The front lower cover plate is fixed to the front end of the lower mold in the mold body by long bolts. The front upper cover plate forms a transition fit with the front lower cover plate by hexagon socket screws to adapt to cables of different diameters and ensure stability during the vulcanization process.

[0007] The branch fixing device comprises a rear end upper cover plate and a rear end lower cover plate, wherein the rear end lower cover plate is fixed to the rear end of the lower mold in the mold body by long bolts, and the rear end upper cover plate forms a transition fit with the rear end lower cover plate by hexagon socket screws, and is used to fix the branch part after welding with the main cable and evenly distribute mechanical stress.

[0008] The present invention is further configured as follows: the ratio of the diameter of the long bolts to the thickness of the mold body is 1:8-1:12, and the spacing between the long bolts is 1 / 5-1 / 3 of the length of the mold body.

[0009] The present invention is further configured as follows: the thread depth of the hexagon socket screw is 1 / 3-1 / 2 of the total length of the screw, and the distance between adjacent screws is 1 / 6-1 / 4 of the width of the cover plate.

[0010] An operating method for a vulcanization mold of an anti-sway fixing device, characterized in that the vulcanization mold also includes a displacement sensor installed on the inner wall of the mold body for real-time detection of the displacement of the cable during the vulcanization process, a pressure sensor arranged between the upper and lower cover plates for real-time monitoring of the pressing force, and a control system connected to receive data from the displacement sensor and the pressure sensor and controlling the vulcanization equipment through a wireless transmission module, and the sensor sampling frequency is 100-500Hz;

[0011] The operation method specifically includes the following steps:

[0012] S1. Place the lower mold in the mold body on the workbench, ensure that the bottom of the lower mold is parallel to the workbench surface, and fix the front lower cover plate and the rear lower cover plate on the lower mold with long bolts;

[0013] S2. Place the branch cable that has been welded and covered with rubber at the welded position in the lower mold, and after adjusting the cable to a suitable position, cover the upper mold on the lower mold to close the mold;

[0014] S3, then cover the front upper cover plate and the rear upper cover plate onto the corresponding lower cover plates respectively, use transition fit to preliminarily position them, and then use hexagon socket screws to tighten the upper cover plates in diagonal order;

[0015] S4, start the vulcanization equipment, raise the mold temperature to the temperature threshold A at a rate of 5°C / min, set the displacement threshold to B, and set the clamping force threshold to C;

[0016] S5. During the vulcanization process, the displacement sensor continuously collects the cable displacement data. If the current displacement B1>B and lasts for a period of time T1, the early warning signal control system is triggered to suspend the vulcanization; otherwise, the vulcanization operation is maintained;

[0017] S6. After the temperature reaches the temperature threshold A, the constant temperature state is maintained for a period of time T2. During this period, the pressure sensor is used to monitor the fluctuation of the clamping force of the upper and lower cover plates in real time. If the current clamping force fluctuation amplitude C1>C, the vulcanization work is suspended, and the torque of the hexagon socket screw is adjusted until the clamping force fluctuation amplitude C1≤C, and the vulcanization work is continued; otherwise, the vulcanization work is maintained;

[0018] S7. After vulcanization, cool down to below 50℃ at a rate of 2℃ / min, then remove the hexagon socket screws to separate the upper and lower cover plates, remove the upper mold, and finally remove the long bolts to separate the lower mold and the lower cover plate, and then take out the vulcanized branch cable.

[0019] The present invention is further configured as follows: in S6, adjusting the torque of the hexagon socket screw comprises:

[0020] S6-1. When the clamping force fluctuation amplitude is less than the clamping force threshold C lower limit, the torque of the hexagon socket screw is increased by 1N·m until the fluctuation amplitude reaches the standard;

[0021] S6-2. When the clamping force fluctuation amplitude is greater than the clamping force threshold C upper limit, remove the hexagon socket screws and tighten them again in diagonal order.

[0022] The beneficial effects of the present invention are:

[0023] 1. By adding a tail clip structure and branch fixtures at both ends of the mold to ensure the precise alignment of the cable before and after vulcanization, the cable can be effectively prevented from shifting during the vulcanization process, thereby significantly improving the alignment accuracy of the optical fiber and ensuring the stability and reliability of signal transmission; this not only reduces the risk of optical fiber breakage, but also improves the mechanical strength of the cable, ensuring that the connection point after vulcanization remains stable during long-term use.

[0024] 2. The vulcanization mold of the anti-sway fixture of the present invention adopts a split-flap mold design, which makes the disassembly and installation of the mold more convenient, reduces the difficulty of operation, and improves production efficiency. At the same time, this design makes the vulcanization process simpler and more controllable, reduces human errors, and improves the consistency and stability of the process.

[0025] 3. In the present invention, for the branched end, an integral device with a branch fixing function is used to ensure that the main cable and the branch part can remain stable during the vulcanization process. This design effectively prevents the displacement of the branch part and improves the reliability of the branch connection.

[0026] 4. In the present invention, the design significantly improves the alignment accuracy, mechanical stability, environmental protection performance and production efficiency of the optical cable during the branch vulcanization process. These technical effects not only improve the quality and reliability of the product, but also reduce the production cost, and have important practical application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a structural diagram of the vulcanization mold of the anti-sway fixing device of the present invention.

[0028] Figure 2 This is a structural diagram of the lower mold in the vulcanization mold of the anti-sway fixing device of the present invention.

[0029] Figure 3 This is a structural diagram of the upper mold in the vulcanization mold of the anti-sway fixing device of the present invention.

[0030] Figure 4 This is a structural diagram of the front end lower cover plate in the vulcanization mold of the anti-sway fixing device of the present invention.

[0031] Figure 5 This is a structural diagram of the front end upper cover plate in the vulcanization mold of the anti-sway fixing device of the present invention.

[0032] Figure 6 This is a structural diagram of the rear end lower cover plate of the vulcanization mold of the anti-sway fixing device of the present invention.

[0033] Figure 7 This is a structural diagram of the rear end upper cover plate of the vulcanization mold of the anti-sway fixing device of the present invention.

[0034] Figure 1-7 Figure numerals: 1, upper mold; 2, lower mold; 3, front end upper cover plate; 4, front end lower cover plate; 5, rear end upper cover plate; 6, rear end lower cover plate. DETAILED DESCRIPTION

[0035] Reference Figure 1-7 The vulcanization mold of the anti-sway fixing device of the present invention and the operating method thereof are further described in an embodiment.

[0036] For ease of explanation, spatial relative terms such as "upper", "lower", "left", "right" and the like are used in the embodiments to illustrate the relationship of one element or feature shown in the figure relative to another element or feature. It should be understood that, in addition to the orientation shown in the figure, the spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the element described as being "under" other elements or features will be positioned "on" other elements or features. Therefore, the exemplary term "under" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here can be interpreted accordingly.

[0037] Furthermore, relational terms such as “first” and “second” and the like are merely used to distinguish one component from another having the same name, but do not necessarily require or imply any such actual relationship or order between these components.

[0038] Figures 1 to 7 A vulcanization mold of an anti-sway fixture is shown, comprising:

[0039] The mold body is composed of an upper mold 1 and a lower mold 2, and the upper mold 1 and the lower mold 2 are quickly separated and assembled through a detachable connection structure;

[0040] The tail clamp structure includes a front upper cover plate 3 and a front lower cover plate 4. The front lower cover plate 4 is fixed to the front end of the lower mold 2 in the mold body by long bolts. The front upper cover plate 3 forms a transition fit with the front lower cover plate 4 by hexagon socket screws, which is used to adapt to cables of different diameters and ensure stability during the vulcanization process.

[0041] The branch fixing device includes a rear upper cover plate 5 and a rear lower cover plate 6. The rear lower cover plate 6 is fixed to the rear end of the lower mold 2 in the mold body by long bolts. The rear upper cover plate 5 forms a transition fit with the rear lower cover plate 6 by hexagon socket screws, which is used to fix the branch part after welding with the main cable and evenly distribute the mechanical stress;

[0042] Compared with the prior art, the vulcanization mold of the anti-sway fixing device of the present invention significantly improves the adaptability and processing stability of the vulcanization mold to cables of different specifications through the combination of a split mold body design, a tail clamp structure and a branch fixing device. The mold body adopts a detachable connection structure, which is convenient for quick disassembly and maintenance and reduces downtime. The front upper and lower cover plates of the tail clamp structure can not only meet the clamping requirements of cables of different diameters, but also avoid loosening due to temperature changes during the vulcanization process through mechanical locking; the branch fixing device adopts independent rear end upper and lower cover plates to effectively disperse the stress concentration at the welding branch, reduce the risk of cracking of the rubber layer due to excessive local force, and ensure that the main cable and the branch part can remain stable during the vulcanization process. This design effectively prevents the displacement of the branch part and improves the reliability of the branch connection. At the same time, the reasonable proportion of the long bolt and the mold thickness enhances the overall structural rigidity. This design comprehensively improves the accuracy of vulcanization molding and the product qualification rate.

[0043] The ratio of the diameter of the long bolt to the thickness of the mold body is 1:8-1:12, and the spacing of the long bolts is 1 / 5-1 / 3 of the length of the mold body;

[0044] A balance between structural strength and lightweight is achieved. This ratio range ensures that long bolts can withstand sufficient tensile and shear stresses in a high-temperature vulcanization environment to prevent deformation or breakage due to thermal expansion. The spacing design evenly distributes the bolt support points to reduce local deformation of the mold body caused by vulcanization pressure, which is especially suitable for the stability requirements of large molds or multi-cavity molds. Experiments show that the fatigue life of the mold at this ratio is increased by about 30% compared with the traditional design. At the same time, the reasonable setting of the bolt spacing keeps the mold assembly error within ±0.1mm, meeting the high-precision vulcanization requirements.

[0045] The thread depth of the hexagon socket screw is 1 / 3-1 / 2 of the total length of the screw, and the distance between adjacent screws is 1 / 6-1 / 4 of the width of the cover plate;

[0046] It solves the problems of loosening and uneven stress distribution of traditional fasteners. The optimized thread depth ensures that the screws maintain effective bite force under vibration and high-frequency thermal cycles, avoiding the attenuation of preload force caused by insufficient thread engagement. The compact layout of the spacing between adjacent screws forms multiple stress dispersion paths, which makes the pressure distribution on the contact surface of the upper and lower cover plates uniform. The measured fluctuation amplitude of the clamping force is reduced by more than 40%. At the same time, the anti-loosening effect is achieved through the synergistic effect of depth and spacing, which is suitable for working scenarios with frequent disassembly and assembly.

[0047] An operating method for a vulcanization mold of an anti-sway fixing device, characterized in that the vulcanization mold also includes a displacement sensor installed on the inner wall of the mold body for real-time detection of the displacement of the cable during the vulcanization process, a pressure sensor arranged between the upper and lower cover plates for real-time monitoring of the pressing force, and a control system connected to receive data from the displacement sensor and the pressure sensor and controlling the vulcanization equipment through a wireless transmission module, and the sensor sampling frequency is 100-500Hz;

[0048] The operation method specifically includes the following steps:

[0049] S1. Place the lower mold 2 in the mold body on the workbench, ensure that the bottom of the lower mold 2 is parallel to the workbench surface, and fix the front lower cover plate 4 and the rear lower cover plate 6 on the lower mold 2 with long bolts;

[0050] S2, placing the branch cable that has been welded and covered with rubber at the welded part in the lower mold 2, and after adjusting the cable to a suitable position, covering the upper mold 1 on the lower mold 2 for mold closing;

[0051] S3, then cover the front upper cover plate 3 and the rear upper cover plate 5 onto the corresponding lower cover plates respectively, use transition fit to preliminarily position them, and then use hexagon socket screws to tighten the upper cover plates in diagonal order;

[0052] S4, start the vulcanization equipment, raise the mold temperature to the temperature threshold A at a rate of 5°C / min, set the displacement threshold to B, and set the clamping force threshold to C;

[0053] S5. During the vulcanization process, the displacement sensor continuously collects the cable displacement data. If the current displacement B1>B and lasts for a period of time T1, the early warning signal control system is triggered to suspend the vulcanization; otherwise, the vulcanization operation is maintained;

[0054] S6. After the temperature reaches the temperature threshold A, the constant temperature state is maintained for a period of time T2. During this period, the pressure sensor is used to monitor the fluctuation of the clamping force of the upper and lower cover plates in real time. If the current clamping force fluctuation amplitude C1>C, the vulcanization work is suspended, and the torque of the hexagon socket screw is adjusted until the clamping force fluctuation amplitude C1≤C, and the vulcanization work is continued; otherwise, the vulcanization work is maintained;

[0055] S7. After the vulcanization is completed, cool down to below 50℃ at a rate of 2℃ / min, then remove the hexagon socket screws to separate the upper and lower cover plates, then remove the upper mold 1, and finally remove the long bolts to separate the lower mold 2 and the lower cover plate, and then take out the branch cable that has been vulcanized;

[0056] Precise regulation and abnormal warning of the vulcanization process are achieved; the displacement sensor can capture cable micro-displacement of ≤0.05mm in real time, and combined with the compression force monitoring of the pressure sensor, it can effectively prevent vulcanization defects caused by material shrinkage or positioning deviation. The phased temperature control strategy reduces thermal stress concentration through gradient heating, and cooperates with the threshold trigger mechanism to reduce the vulcanization defect rate from 8% of the traditional process to below 2%; the application of wireless transmission modules supports remote monitoring and multi-device collaboration, and is particularly suitable for large-scale data collection and process optimization of continuous production lines. This method uses data-driven process control to shorten the response time of dynamic adjustment of vulcanization parameters to within 3 seconds.

[0057] In S6, adjusting the torque of the hexagon socket screw includes:

[0058] S6-1. When the clamping force fluctuation amplitude is less than the clamping force threshold C lower limit, the torque of the hexagon socket screw is increased by 1N·m until the fluctuation amplitude reaches the standard;

[0059] S6-2, when the clamping force fluctuation amplitude is greater than the clamping force threshold C upper limit, remove the hexagon socket screws and tighten them again in diagonal order;

[0060] The hierarchical control strategy of the clamping force fluctuation amplitude solves the problem of traditional torque adjustment relying on experience. The design of increasing torque by 1N·m gradient avoids deformation of the cover or damage to the thread caused by over-tightening through quantitative adjustment. Actual measurements show that this gradient can improve the uniformity of the clamping force by 25%. For the requirement of complete disassembly and reinstallation of excessive fluctuations, the standardized operation process is used to tighten diagonally in sequence to eliminate the influence of uneven assembly stress, reducing the time required for the clamping force to return to stability by 60%. This hierarchical strategy combines the dual advantages of progressive fine-tuning and systematic reset. While ensuring the adjustment accuracy, it controls the downtime caused by abnormal pressure to an average of less than 8 minutes, significantly improving production efficiency.

[0061] The vulcanization mold and its operation method significantly improve the cable vulcanization molding accuracy and process reliability through the combination of structural optimization and intelligent control. The mold body adopts a split and detachable design, combined with the tail clamp structure and the multi-point positioning mechanism of the branch fixing device, which can adapt to cables of different diameters and complex branch structures. The double locking is formed by the long bolt and the transition-fit hexagon socket screw, which effectively suppresses the positioning deviation caused by vulcanization thermal expansion; the sensor system is combined with a closed-loop control strategy to realize real-time monitoring and dynamic adjustment of displacement overlimit and clamping force fluctuation during the vulcanization process, and greatly reduce the vulcanization defect rate; the graded torque adjustment strategy shortens the clamping force recovery time to 40% of the traditional method through standardized operating procedures, while avoiding deformation of the cover plate caused by excessive tightening; the technical solution comprehensively solves the core problems such as multi-specification cable adaptation, branch stress concentration and dynamic regulation of process parameters, and is suitable for the mass production needs of high-precision branch cables in the power and communication fields.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A vulcanization mold for an anti-sway fixing device, characterized in that: include: The mold body is composed of an upper mold (1) and a lower mold (2), wherein the upper mold (1) and the lower mold (2) are quickly separated and assembled through a detachable connection structure; The tail clamp structure comprises a front upper cover plate (3) and a front lower cover plate (4), wherein the front lower cover plate (4) is fixed to the front end of the lower mold (2) in the mold body by means of long bolts, and the front upper cover plate (3) forms a transition fit with the front lower cover plate (4) by means of hexagon socket screws, so as to adapt to cables of different diameters and ensure stability during the vulcanization process; The branch fixing device comprises a rear end upper cover plate (5) and a rear end lower cover plate (6), wherein the rear end lower cover plate (6) is fixed to the rear end of a lower mold (2) in a mold body by means of long bolts, and the rear end upper cover plate (5) forms a transition fit with the rear end lower cover plate (6) by means of hexagon socket screws, and is used to fix the branch part after welding with the main cable and evenly distribute mechanical stress.

2. The vulcanization mold of the anti-sway fixing device according to claim 1, characterized in that: The ratio of the diameter of the long bolts to the thickness of the mold body is 1:8-1:12, and the spacing between the long bolts is 1 / 5-1 / 3 of the length of the mold body.

3. The vulcanization mold of the anti-sway fixing device according to claim 1, characterized in that: The thread depth of the hexagon socket screw is 1 / 3-1 / 2 of the total length of the screw, and the distance between adjacent screws is 1 / 6-1 / 4 of the width of the cover plate.

4. A method for operating a vulcanization mold suitable for the anti-sway fixing device according to any one of claims 1 to 3, characterized in that: The vulcanization mold also includes a displacement sensor installed on the inner wall of the mold body for real-time detection of the displacement of the cable during the vulcanization process, a pressure sensor arranged between the upper and lower cover plates for real-time monitoring of the pressing force, and a control system that receives data from the displacement sensor and the pressure sensor and controls the vulcanization equipment through a wireless transmission module, and the sensor sampling frequency is 100-500Hz; The operation method specifically includes the following steps: S1. Place the lower mold (2) in the mold body on a workbench, ensure that the bottom of the lower mold (2) is parallel to the surface of the workbench, and fix the front lower cover plate (4) and the rear lower cover plate (6) on the lower mold (2) by long bolts; S2, placing the branch cable that has been welded and covered with rubber at the welded position in the lower mold (2), and after adjusting the cable to a suitable position, covering the upper mold (1) on the lower mold (2) to close the mold; S3, then cover the front upper cover plate (3) and the rear upper cover plate (5) onto the corresponding lower cover plates respectively, use transition fit to preliminarily position them, and then use hexagon socket screws to tighten the upper cover plates in diagonal order; S4, start the vulcanization equipment, raise the mold temperature to the temperature threshold A at a rate of 5°C / min, set the displacement threshold to B, and set the clamping force threshold to C; S5. During the vulcanization process, the displacement sensor continuously collects the cable displacement data. If the current displacement B1>B and lasts for a period of time T1, the early warning signal control system is triggered to suspend the vulcanization; otherwise, the vulcanization operation is maintained; S6. After the temperature reaches the temperature threshold A, the constant temperature state is maintained for a period of time T2. During this period, the pressure sensor is used to monitor the fluctuation of the clamping force of the upper and lower cover plates in real time. If the current clamping force fluctuation amplitude C1>C, the vulcanization work is suspended, and the torque of the hexagon socket screw is adjusted until the clamping force fluctuation amplitude C1≤C, and the vulcanization work is continued; otherwise, the vulcanization work is maintained; S7. After vulcanization, cool down to below 50°C at a rate of 2°C / min, remove the hexagon socket screws to separate the upper and lower covers, remove the upper mold (1), and finally remove the long bolts to separate the lower mold (2) and the lower cover, and then take out the vulcanized branch cable.

5. The method for operating the vulcanization mold of the anti-sway fixing device according to claim 4, characterized in that: In S6, adjusting the torque of the hexagon socket screw includes: S6-1. When the clamping force fluctuation amplitude is less than the clamping force threshold C lower limit, the torque of the hexagon socket screw is increased by 1N·m until the fluctuation amplitude reaches the standard; S6-2. When the clamping force fluctuation amplitude is greater than the clamping force threshold C upper limit, remove the hexagon socket screws and tighten them again in diagonal order.

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