Process for the preparation of a polyvinyl chloride cable material

Abstract

The application relates to a preparation process of a polyvinyl chloride cable material in the cable field, and specifically relates to a preparation process of a polyvinyl chloride cable material, which specifically comprises the following steps: selecting raw material master batches and adding plasticizers, mixing and stirring; setting mixing equipment parameters and uniform identification values; mixing and stirring, monitoring local resistance, and adjusting a vibrating feeding part to promote melting if the local resistance exists; checking material uniformity after stirring, returning to the previous step if the material is not uniform, feeding and adding additives if the material is uniform, ensuring the uniformity of the additives by grading feeding and secondary stirring, and continuing to stir; checking the uniformity again, and extruding and granulating if the uniformity is good; screening the granules with uniform sizes after granulation; and quality detection, and packaging qualified products, so that information in the mixing and feeding processes can be fed back in real time, the mixing and feeding work is adjusted according to the local resistance condition during stirring, the material and additives are uniformly mixed, and the prepared cable material is stable in quality and reliable in performance.

Description

TECHNICAL FIELD

[0001] The application relates to a preparation process of a polyvinyl chloride cable material, in particular to a preparation process of a polyvinyl chloride cable material applied to the cable field. BACKGROUND

[0002] In the wire and cable industry, polyvinyl chloride (PVC) cable material has always occupied an important position. As a widely used cable material, polyvinyl chloride cable material has been widely used in the fields of power, communication, building, etc. due to its unique performance and advantages.

[0003] Polyvinyl chloride cable material is mainly composed of polyvinyl chloride resin, stabilizer, plasticizer, filler, lubricant, etc. Polyvinyl chloride cable material has been widely used in the wire and cable industry due to its good electrical insulation performance, heat resistance, cold resistance, oil resistance, chemical corrosion resistance and weather resistance. In the future, with the continuous progress of science and technology and the continuous improvement of environmental protection requirements, polyvinyl chloride cable material will face more challenges and opportunities.

[0004] In order to solve the problem of polyvinyl chloride cable material production quality, a certain polyvinyl chloride cable material production process in the market adopts the design of adding auxiliary agent, which has a certain market share.

[0005] Chinese invention patent CN116656061B discloses a heat-resistant and aging-resistant polyvinyl chloride cable material and a preparation process thereof. The molecular structure of the aging resistance agent contains a large number of benzene rings, which have high stability and good high-temperature resistance. In addition, the molecular structure also contains hindered phenol structure and aniline structure, which can eliminate free radicals and improve the anti-aging effect. Moreover, the molecular structure also contains triazine ring structure, which can further improve the anti-aging performance. Therefore, adding the aging resistance agent to the polyvinyl chloride cable material can improve the high-temperature resistance, anti-aging performance and service life of the polyvinyl chloride cable material.

[0006] However, the existing polyvinyl chloride cable material production has some problems, such as uneven stirring of the master batch, and local solidification in the stirring process due to accidents, which can affect the product quality. Moreover, it is difficult to monitor the local solidification of the material during the mixing process and make adjustments. SUMMARY

[0007] In view of the above existing technology, the technical problem to be solved by the present application is that the existing polyvinyl chloride cable material production has the problem of uneven stirring of the master batch, and local solidification in the stirring process due to accidents, which can affect the product quality. Moreover, it is difficult to monitor the local solidification of the material during the mixing process and make adjustments.

[0008] To solve the above problems, the application provides a preparation process of polyvinyl chloride cable material, which specifically comprises the following steps:

[0009] A1, selecting raw material master batch, adding plasticizer in the selected raw material master batch;

[0010] A2, material mixing and stirring treatment; the raw material master batch with added plasticizer is put into a mixing machine for mixing and stirring;

[0011] A21, setting the working parameters of the mixing equipment and the mixing uniformity identification value range; the mixing equipment comprises a mixing tank with a motor, the mixing tank is installed on a support, a stirring shaft matched with the motor is installed in the mixing tank, a plurality of uniformly distributed stirring units are installed on the stirring shaft, two pairs of stirring blades are fixedly connected to the stirring units, monitoring plates are fixedly connected to the stirring blades, and a pressure sensing belt and a temperature sensor are arranged on the monitoring plates;

[0012] One pair of stirring blades is connected with an auxiliary frame, a vibration feeding part is installed in the middle of the auxiliary frame, the vibration feeding part comprises a fixed beam, a plurality of vibration blocks are slidably arranged at the lower end of the fixed beam, a vibration motor matched with the plurality of vibration blocks is arranged in the fixed beam, a plurality of pairs of nozzles are arranged at the side end of the vibration block, a plurality of branch pipes that slide relative to the vibration blocks are arranged on the vibration motor, and a vibration motor for vibrating the vibration blocks up and down is installed in the fixed beam;

[0013] A22, mixing and stirring work, the mixing equipment is controlled to uniformly stir the plastic master batch, during the stirring process, the local resistance of the mixing tank during stirring is monitored through the monitoring plates on the stirring shaft, the working of the vibration feeding part is adjusted according to the monitored local resistance, so that the vibration feeding part vibrates and heats the local solidification area; promote the rapid melting of the local solidification area; after the stirring is set for a time, the next step is performed;

[0014] A23, determining whether the material is uniformly stirred, if not, returning to step A22; if yes, performing feeding work, and selecting an additive and adding the additive through the vibration feeding part; when the vibration feeding part adds, the vibration feeding part performs graded feeding from top to bottom; when the additive is fed, secondary stirring is performed at a set rotating speed, and when the additive is fed, the vibration feeding part vibrates and intermittently outputs liquid additive, so as to promote the diffusion and uniform distribution of the additive;

[0015] A24, after the stirring is set for a time, the next step is performed;

[0016] A25, after the secondary stirring, determining whether the material is uniformly stirred; if yes, the material is extruded for granulation, otherwise, returning to step A24;

[0017] A3, the granules are screened after granulation, and the granules with uniform size are screened out for next step processing;

[0018] A4, the screened granules are subjected to quality detection; the qualified granules are packaged.

[0019] In the preparation process of the polyvinyl chloride cable material, the raw materials are uniformly mixed and then granulated, and the additives are uniformly added during the mixing process.

[0020] As a further improvement of the present application, the flow guide channels are arranged in the stirring units and the stirring blades, the input pipe and the output pipe matched with the flow guide channels are arranged on the stirring shaft, the liquid inlet pipe and the liquid outlet pipe are arranged in the stirring shaft, the liquid inlet pipe and the liquid outlet pipe are communicated with the flow guide channels of the plurality of stirring units, the flow guide disc is arranged at one end of the stirring shaft outside the mixing tank, the flow guide disc includes the upper disc and the lower disc adjacent to each other, the through holes are arranged on the upper disc and the lower disc in a circumferential distribution, the through holes on the upper disc and the lower disc are communicated with the liquid inlet pipe and the liquid outlet pipe respectively, the flow guide box matched with the flow guide disc is arranged on the support, and the flow guide box is used for regulating the input and output of the liquid in the stirring shaft.

[0021] As a further improvement of the present application, in the step A23 of determining whether the material is uniform, the plurality of stirring units are rotated at a set speed, and whether the resistance detected by the plurality of stirring units is within a set value range is identified during rotation; if yes, it is judged that the stirring is uniform, otherwise it is judged that the stirring is not uniform.

[0022] As a further improvement of the present application, the liquid inlet pipe is arranged in the middle of the stirring shaft, the liquid outlet pipe is sleeved on the outer end of the liquid inlet pipe, and the liquid outlet pipe is made of heat-conducting material.

[0023] As a further improvement of the present application, the three vibration feeding parts adjacent to each other are located at the front, middle and rear sections of the stirring blade respectively, and the spacing between the two adjacent monitoring plates is 2-10 mm.

[0024] As a further improvement of the present application, the two pairs of stirring blades are in X shape, the flow guide channels are arranged in the two stirring blades connected with the auxiliary frame, and the long edges of the other two stirring blades are provided with chamfers.

[0025] As a further improvement of the present application, the monitoring plate includes a pair of C-shaped beams sliding relative to the stirring blades, a side baffle is connected between the two C-shaped beams, the side ends of the C-shaped beams and the side baffle are paved with pressure sensing strips, the front and rear ends of the stirring blade are provided with double-shaft electric push rods connected with the side baffle, and the maximum movement range of the vibrating block is within the height range of the monitoring plate.

[0026] As a further improvement of the present application, the production control system further includes a processor, and the processor is connected with a data processing module, a monitoring module, a control module and an alarm module.

[0027] The control module is equipped with a stirring mode and a feeding mode; the stirring mode is used to control the stirring and mixing process, and the feeding mode is used to control the feeding process.

[0028] The data processing module is used to receive and process monitoring data from the monitoring module in real time;

[0029] The data processing module analyzes and judges the uniformity of material mixing and whether there are any abnormalities such as local solidification based on the monitoring data; according to the analysis results, it sends preset instructions to the control module to adjust the mixing parameters or feeding method.

[0030] The monitoring module is connected to the pressure sensor and is used to collect monitoring data from the mixing equipment, including stirring resistance, material temperature, and additive dosage.

[0031] In summary, this solution can provide real-time feedback on information during the mixing and feeding process, and adjust the mixing and feeding operations according to the local resistance during stirring, ensuring uniform mixing of materials and additives, and ensuring that the prepared cable materials have stable quality and reliable performance. Attached Figure Description

[0032] Figure 1 This is a process flow diagram of the first embodiment of this application;

[0033] Figure 2 These are perspective views of the mixing device according to the first and second embodiments of this application;

[0034] Figure 3 These are cross-sectional views of the mixing device according to the first and second embodiments of this application;

[0035] Figure 4 for Figure 3 Schematic diagram of the structure at point A;

[0036] Figure 5 for Figure 3 Schematic diagram of the structure at point B;

[0037] Figure 6 This is a schematic diagram of the vibration operation of the vibrating feeding unit in the first and second embodiments of this application;

[0038] Figure 7 This is a perspective view of the stirring shaft portion in the first and second embodiments of this application;

[0039] Figure 8 These are cross-sectional views of the mixing tank according to the first and second embodiments of this application;

[0040] Figure 9 for Figure 8 Schematic diagram of the structure at point C;

[0041] Figure 10 This is a schematic diagram of the adjusted C-beam according to the second embodiment of this application.

[0042] Explanation of the labels in the diagram:

[0043] 1 Mixing tank, 2 Stirring shaft, 21 Stirring unit, 22 Stirring blade, 23 Inlet pipe, 24 Drain pipe, 3 Monitoring plate, 31 C-shaped beam, 32 Side baffle, 4 Auxiliary frame, 5 Vibrating feeding part, 51 Fixed beam, 52 Vibrating block, 53 Guide pipe, 54 Electromagnet, 55 Stirring blade, 6 Guide box, 7 Guide plate, 71 Upper disc, 72 Lower disc. Detailed Implementation

[0044] The three embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0045] Implementation method 1:

[0046] Figures 1-7 The diagram illustrates a manufacturing process for a polyvinyl chloride (PVC) cable material, specifically including the following steps:

[0047] A1. Select raw material masterbatch and add plasticizer to the selected raw material masterbatch;

[0048] A2, Material mixing and stirring process; The raw material masterbatch with added plasticizer is put into the mixer for mixing and stirring.

[0049] A21, Set the operating parameters of the mixing equipment and the range of mixing uniformity recognition values;

[0050] A22, Mixing and stirring operation: Control the mixing equipment to mix the plastic masterbatch evenly. During the mixing process, the monitoring plate 3 on the stirring shaft 2 monitors the local resistance of the mixing tank 1. Based on the monitored local resistance, the operation of the vibrating feeding section 5 is adjusted so that the vibrating feeding section 5 vibrates and heats the local solidification area, promoting rapid melting of the local solidification area. After the set stirring time, proceed to the next step.

[0051] A23, determine whether the material is stirred evenly; when determining whether the material is stirred evenly, multiple stirring units 21 rotate at a set speed, and when rotating, identify whether the resistance detected at multiple stirring units 21 is within the set value range; if so, it is determined that the stirring is even, otherwise it is determined that the stirring is not even.

[0052] If the judgment is negative, return to step A22; if the judgment is uniform, proceed with the feeding process. During the feeding process, select the additive and add it through the vibrating feeding unit 5. When adding, the vibrating feeding unit 5 feeds the additive in stages from top to bottom through multiple vibrating feeding units 5 (while the stirring shaft 2 rotates at low speed). When adding the additive (the additive is a liquid additive), perform secondary stirring at a set speed. During the feeding, the fixed beam 51 vibrates and intermittently outputs the liquid additive to promote the diffusion and uniform distribution of the additive.

[0053] A24, after stirring for the set time, proceed to the next step;

[0054] A25. After the second stirring, determine whether the material is stirred evenly; if so, extrude the material for granulation; otherwise, return to step A24.

[0055] A3. After granulation, the particles are screened to select particles of uniform size for the next step of processing.

[0056] A4. The selected particles are subjected to quality testing; qualified particles are then packaged.

[0057] In the above-mentioned preparation process of polyvinyl chloride cable material, the raw materials are mixed evenly before granulation, and the additives are easily added evenly during the mixing process.

[0058] The preparation process of this embodiment, by introducing a mixing uniformity identification value range and a local resistance monitoring mechanism, can adjust the mixing process in real time to ensure that the raw materials and plasticizers are fully mixed, thus avoiding product performance differences caused by uneven mixing.

[0059] The use of a vibratory feeding unit 5 for graded feeding not only ensures the uniformity of additive distribution but also improves its dispersibility. This precise control helps optimize the performance of cable materials while reducing resource waste.

[0060] After the additive is added, a second stirring process is used to further ensure the uniform distribution of the additive. During the second stirring process, the vibration and intermittent feeding design of the vibrating feeding unit 5 promotes the diffusion and distribution of the additive, thereby further improving the quality of the product.

[0061] The second implementation method:

[0062] Figures 2-10As shown, the mixing equipment includes a mixing tank 1 with a motor, an extrusion tube is provided at the lower side of the mixing tank 1, and the mixing tank 1 is mounted on a bracket. A stirring shaft 2 matched with the motor is installed inside the mixing tank 1. A transmission belt for driving the stirring shaft 2 to rotate is installed at the power output end of the motor. Multiple evenly distributed stirring units 21 are installed on the stirring shaft 2. Two pairs of stirring blades 22 are fixedly connected to the stirring unit 21. A monitoring plate 3 is fixedly connected to the stirring blades 22. A pressure sensing belt and a temperature sensor are provided on the monitoring plate 3.

[0063] An auxiliary frame 4 connects a pair of stirring blades 22. A vibrating feeding section 5 is installed in the middle of the auxiliary frame 4. The vibrating feeding section 5 includes a fixed beam 51. Multiple vibrating blocks 52 are slidably arranged at the lower end of the fixed beam 51. A guide pipe 53 matching the multiple vibrating blocks 52 passes through the fixed beam 51. Multiple pairs of nozzles are arranged on the side end of the vibrating blocks 52. Multiple branch pipes that slide relative to the vibrating blocks 52 are arranged on the guide pipe 53. A stirring blade 55 that slides relative to the auxiliary frame 4 is arranged at the upper end of the fixed beam 51. An electric heating device is installed in the stirring blade 55. An electromagnet 54 for the up-and-down vibration of the vibrating blocks 52 and the stirring blade 55 is installed in the fixed beam 51. A permanent magnet matching the electromagnet 54 is installed on both the vibrating blocks 52 and the stirring blade 55. A C-shaped heat insulation beam is arranged at the connection between the stirring blade 55 and the permanent magnet.

[0064] Multiple return springs are installed between the vibrating block 52 and the stirring plate 55 and the fixed beam 51;

[0065] By activating the electromagnet 54, the permanent magnets on the vibrating block 52 and the stirring plate 55 repel the electromagnet 54, causing them to move outward. When the electromagnet 54 is deactivated, the vibrating block 52 and the stirring plate 55 are reset by the return spring. By controlling the power of the electromagnet 54, the vibration amplitude of the vibrating block 52 is adjusted. When the nozzle on the vibrating block 52 is exposed, the liquid flowing in the guide pipe 53 can be output. A flow valve is provided at the end of the guide pipe 53. By adjusting the flow valve, the liquid entering the guide pipe 53 is quickly output under hydraulic action when the nozzle is exposed. When the electromagnet 54 is activated, the heating device heats the entire stirring plate 55, causing the stirring plate 55 to vibrate and heat the surrounding materials.

[0066] Optionally, depending on production needs, the flow valve can be closed. When liquid is dispensed through the vibrating block 52, the vibrating block 52 is normally open under the push of the fluid to allow for continuous liquid dispensing. This dispensing method uses a larger amount of liquid than the vibration dispensing method. When stirring is obstructed, it is easy for a large amount of liquid to accumulate rapidly in a local area, which can easily lead to local solidification. Therefore, the vibration dispensing method is used when this solution is in normal use.

[0067] Both the stirring unit 21 and the stirring blade 22 are provided with flow guide channels. The stirring shaft 2 is equipped with an input pipe and an output pipe that match the flow guide channels. The stirring shaft 2 is provided with an inlet pipe 23 and a drain pipe 24. The inlet pipe 23 and the drain pipe 24 are connected to the flow guide channels of multiple stirring units 21. The two pairs of stirring blades 22 are X-shaped. The flow guide channels are opened in the two stirring blades 22 connected to the auxiliary frame 4. The long sides of the other two stirring blades 22 are chamfered.

[0068] A guide plate 7 is installed at one end of the stirring shaft 2 located outside the mixing tank 1. The guide plate 7 includes an upper disc 71 and a lower disc 72 that are adjacent to each other. The upper disc 71 and the lower disc 72 are provided with through holes distributed in a circle. The through holes on the upper disc 71 and the lower disc 72 are respectively connected to the liquid inlet pipe 23 and the liquid outlet pipe 24. A guide box 6 that matches the guide plate 7 is installed on the bracket. The guide box 6 is used to regulate the input and output of liquid in the stirring shaft 2. The guide box 6 is connected to a liquid pump through a conduit. After the liquid is input into the guide box 6, the liquid enters the liquid inlet pipe 23 in the stirring shaft 2 from the upper disc 71, and then enters the guide channel of each stirring unit 21 through the liquid inlet pipe 23. The liquid passes through the stirring blade 22, the guide pipe 53 and another stirring blade 22 in sequence along the guide channel. Finally, the liquid that is not discharged enters the liquid outlet pipe 24 in the stirring shaft 2 for output.

[0069] The lower end of the guide plate 7 is provided with an extension shaft, and the bottom end of the extension shaft is connected to the power output end of the motor via a transmission belt.

[0070] The liquid inlet pipe 23 is located in the middle of the stirring shaft 2, and the liquid outlet pipe 24 is sleeved on the outer end of the liquid inlet pipe 23. The liquid outlet pipe 24 is made of heat-conducting material. After the liquid flows through the stirring blades 22, it is discharged. During the discharge, the liquid that has exchanged heat with the material in the mixing tank 1 exchanges heat with the liquid inlet pipe 23, so that the liquid in the liquid inlet pipe 23 is preheated, thus avoiding the input of low-temperature liquid into the mixing tank 1, which would cause local material to cool down and solidify.

[0071] The adjacent vibrating feeding sections 5 are located at the front, middle and rear sections of the stirring blades 22, respectively. The distance between two adjacent monitoring plates 3 is 2-10mm. Every three vibrating feeding sections 5 form a group. When they rotate, they correspond to a circular area in the mixing tank 1. When local solidification occurs at any position in this circular area, it can be vibrated and heat-treated by the three vibrating feeding sections 5 in the corresponding area to make the local solidification melt.

[0072] Optionally, the monitoring plate 3 includes a pair of C-shaped beams 31 that slide relative to the stirring blades 22. A side baffle 32 is connected between the pair of C-shaped beams 31. Pressure sensing strips are laid on the side ends of both the C-shaped beams 31 and the side baffles 32. A dual-axis electric push rod connected to the side baffles 32 is installed at both the front and rear ends of the stirring blades 22. The maximum range of motion of the vibrating block 52 is within the height range of the monitoring plate 3. The height of the monitoring plate 3 can be adjusted by the dual-axis electric push rod, thereby adjusting the vertical distance between two adjacent stirring blades 22, so that the solidified local material is not easy to pass through the gap between the two adjacent stirring blades 22.

[0073] The mixing device in this embodiment can monitor the local resistance of the mixing tank 1 during stirring in real time through the pressure sensing strip laid on the monitoring plate 3, thereby accurately judging whether there is local solidification or uneven mixing during the mixing process.

[0074] Based on the monitored local resistance, the mixing equipment can adjust the working state of the vibrating feeding section 5 in real time, and perform vibration and heating treatment on the local solidification area, effectively solving the problem of unevenness in the mixing process.

[0075] The vibrating feeding unit 5 can adopt a graded feeding method, which not only ensures the uniformity of additive feeding, but also improves the dispersibility of additives, enabling additives to be quickly and evenly dispersed into the material. During the addition of additives, the vibrating feeding unit 5 uses an electromagnet 54 to vibrate the vibrating block 52 to intermittently output liquid additives, which promotes the diffusion and distribution of additives and improves mixing efficiency.

[0076] The design of the stirring unit 21 and the stirring blades 22, as well as the configuration of the liquid inlet pipe 23 and the liquid outlet pipe 24 in the stirring shaft 2, form an efficient mixing, heating and feeding structure.

[0077] This implementation method can provide real-time feedback on information during the mixing process and the addition of additives, helping operators to promptly identify and address problems, thereby improving production efficiency and product quality.

[0078] In summary, the mixing equipment of this embodiment demonstrates significant advantages and outstanding progress in real-time monitoring and precise adjustment, efficient additive dosing, optimized mixing and heating systems, extensive localized treatment, and intelligent operation and monitoring, providing strong support for the preparation process of polyvinyl chloride cable materials.

[0079] The third implementation method:

[0080] It also includes a production control system, which includes a processor with a data processing module, a monitoring module, a control module and an alarm module connected to it;

[0081] The control module is equipped with a stirring mode and a feeding mode; the stirring mode is used to control the stirring and mixing process, and the feeding mode is used to control the feeding process.

[0082] The data processing module is used to receive and process monitoring data from the monitoring module in real time;

[0083] The data processing module analyzes and judges the uniformity of material mixing and whether there are any abnormalities such as local solidification based on the monitoring data; according to the analysis results, it sends preset instructions to the control module to adjust the mixing parameters or feeding method.

[0084] The monitoring module is connected to the pressure sensor and is used to collect monitoring data from the mixing equipment, including stirring resistance, material temperature, and additive dosage.

[0085] When the mixing mode is in operation, the control module adjusts the rotation speed and mixing time of the mixing shaft according to the preset mixing parameters to ensure that the materials are fully mixed in the mixing tank. At the same time, the monitoring module monitors the mixing resistance and material temperature in real time through the monitoring board 3. The data processing module analyzes the monitoring data. If an abnormal increase in local resistance or a decrease in material temperature is detected, it is judged as local solidification. At this time, the data processing module will send a command to the control module to adjust the working state of the vibrating feeding part 5 near the local solidification area, and perform vibration and heating treatment on the local solidification area to promote rapid melting of the local solidification area. At this time, the mixing shaft 2 can be driven to rotate, so that the vibrating feeding part 5 is close to the local area, and then the mixing shaft 2 can be stopped until the local solidification area melts. Alternatively, the vibrating feeding part 5 can be continuously turned on for vibration and heating while the mixing shaft 2 is rotating. Those skilled in the art can adjust the working mode of the mixing shaft 2 and the vibrating feeding part 5 when dealing with the local solidification area according to the production needs.

[0086] The specific workflow of the feeding mode includes: the control module adjusts the vibration frequency, feeding speed and feeding amount of the vibrating feeding unit 5 according to the preset feeding parameters. At the same time, the monitoring module monitors the amount of additives added in real time. The amount of additives added is calculated based on the flow difference of the liquid in the inlet pipe 23 and the outlet pipe 24 within a set time period, and the amount of additives added is sent to the data processing module for analysis. When the amount of additives added in the set time period does not meet the preset requirements, the working state of the vibrating feeding unit 5 is adjusted, the vibration frequency is increased and the working time of the electromagnet 54 is extended (i.e., the opening time of the electromagnet 54 is extended) to extend the nozzle exposure time when the vibrating block 52 vibrates, so as to ensure that the additives are fully added in the subsequent stirring process.

[0087] In addition, the alarm module is used to issue alarm signals when abnormal conditions are detected, so that operators can detect and handle them in a timely manner. For example, when an abnormal increase in stirring resistance, a drop in material temperature, or an incorrect amount of additives is detected, the alarm module will issue an audible and visual alarm signal to remind operators to take appropriate measures.

[0088] The application of the aforementioned production control system enables precise control and monitoring of the polyvinyl chloride (PVC) cable material preparation process, ensuring stable quality and reliable performance of the produced cable materials. Furthermore, the system can be flexibly adjusted and optimized according to actual needs to meet diverse production requirements.

[0089] In light of current practical needs, the above-described embodiments adopted in this application are not limited to these. Any changes made within the scope of knowledge possessed by those skilled in the art without departing from the concept of this application still fall within the protection scope of this invention.

Claims

1. A preparation process for polyvinyl chloride cable material, characterized in that: Specifically, the following steps are included: A1, Raw material processing, selecting raw material masterbatch, and adding plasticizer to the selected raw material masterbatch; A2, Material mixing and stirring process; The raw material masterbatch with added plasticizer is put into the mixer for mixing and stirring. A21, set the working parameters of the mixing equipment and the range of uniform mixing identification values; the mixing equipment includes a mixing tank (1) with a motor, and the mixing tank (1) is mounted on a bracket. The mixing tank (1) is equipped with a stirring shaft (2) that matches the motor. Multiple uniformly distributed stirring units (21) are mounted on the stirring shaft (2). Two pairs of stirring blades (22) are fixedly connected to the stirring unit (21). A monitoring plate (3) is fixedly connected to the stirring blades (22). A pressure sensing belt and a temperature sensor are provided on the monitoring plate (3). An auxiliary frame (4) is connected between a pair of stirring blades (22). A vibrating feeding part (5) is installed in the middle of the auxiliary frame (4). The vibrating feeding part (5) includes a fixed beam (51). Multiple vibrating blocks (52) are slidably arranged at the lower end of the fixed beam (51). A guide pipe (53) matching the multiple vibrating blocks (52) is passed through the fixed beam (51). Multiple pairs of nozzles are arranged on the side end of the vibrating blocks (52). Multiple branch pipes that slide relative to the vibrating blocks (52) are arranged on the guide pipe (53). A stirring blade (55) that slides relative to the auxiliary frame (4) is arranged at the upper end of the fixed beam (51). An electric heating device is installed in the stirring blade (55). An electromagnet (54) for vibrating the vibrating blocks (52) up and down is installed in the fixed beam (51). A22, Mixing and stirring operation, controlling the mixing equipment to mix the plastic masterbatch evenly. During the mixing process, the monitoring plate (3) on the stirring shaft (2) monitors the local resistance of the mixing tank (1) during stirring. Based on the monitored local resistance, the operation of the vibrating feeding section (5) is adjusted so that the vibrating feeding section (5) vibrates and heats the local solidification area; promotes the rapid melting of the local solidification area; and proceeds to the next step after the stirring is set for a set time. A23, determine whether the material is uniformly mixed. If the determination is no, return to step A22. If the determination is uniform, proceed with the feeding operation. During the feeding operation, select the additive and add it through the vibrating feeding section (5). When adding, the vibrating feeding section (5) feeds the additive from top to bottom in stages through multiple vibrating feeding sections (5). When adding the additive, the set speed is used for secondary stirring. During the feeding, the vibrating feeding section (5) vibrates and intermittently outputs the liquid additive to promote the diffusion and uniform distribution of the additive. A24, after stirring for the set time, proceed to the next step; A25. After the second stirring, determine whether the material is stirred evenly; if so, extrude the material for granulation; otherwise, return to step A24. A3. After granulation, the particles are screened to select particles of uniform size for the next step of processing. A4. The selected particles are subjected to quality testing; qualified particles are then packaged.

2. The preparation process of a polyvinyl chloride cable material according to claim 1, characterized in that: The stirring unit (21) and stirring blade (22) are provided with flow channels. The stirring shaft (2) is provided with an inlet pipe (23) and a drain pipe (24). The inlet pipe (23) and the drain pipe (24) are connected to the flow channels of multiple stirring units (21). The stirring shaft (2) is provided with a flow guide plate (7) at one end outside the mixing tank (1). The flow guide plate (7) includes an upper disc (71) and a lower disc (72) that are adjacent to each other. The upper disc (71) and the lower disc (72) are provided with through holes distributed in a circle. The through holes on the upper disc (71) and the lower disc (72) are connected to the inlet pipe (23) and the drain pipe (24) respectively. The bracket is provided with a flow guide box (6) that matches the flow guide plate (7). The flow guide box (6) is used to regulate the input and output of liquid in the stirring shaft (2).

3. The preparation process of a polyvinyl chloride cable material according to claim 2, characterized in that: When determining whether the material is uniform in A23, multiple stirring units (21) rotate at a set speed. When rotating, the resistance detected at multiple stirring units (21) is identified as being within the set value range. If so, it is determined that the stirring is uniform; otherwise, it is determined that the stirring is uneven.

4. The preparation process of a polyvinyl chloride cable material according to claim 2, characterized in that: The liquid inlet pipe (23) is located in the middle of the stirring shaft (2), and the liquid outlet pipe (24) is sleeved on the outer end of the liquid inlet pipe (23). The liquid outlet pipe (24) is made of heat-conducting material.

5. The preparation process of a polyvinyl chloride cable material according to claim 2, characterized in that: The three adjacent vibrating feeding sections (5) are located at the front, middle and rear sections of the stirring blade (22), respectively, and the distance between the two adjacent monitoring plates (3) is 2-10 mm.

6. The preparation process of a polyvinyl chloride cable material according to claim 2, characterized in that: The two pairs of stirring blades (22) are X-shaped, and the flow channel is opened in the two stirring blades (22) connected to the auxiliary frame (4). The long sides of the other two stirring blades (22) are chamfered.

7. The preparation process of a polyvinyl chloride cable material according to claim 2, characterized in that: The monitoring plate (3) includes a pair of C-shaped beams (31) that slide relative to the stirring blade (22). A side baffle (32) is connected between the pair of C-shaped beams (31). Pressure sensing strips are laid on the side ends of the C-shaped beams (31) and the side baffle (32). A dual-axis electric push rod connected to the side baffle (32) is installed at both the front and rear ends of the stirring blade (22). The maximum range of motion of the vibration block (52) is within the height range of the monitoring plate (3).

8. The preparation process of a polyvinyl chloride cable material according to claim 2, characterized in that: It also includes a production control system, which includes a processor and is connected to a data processing module, a monitoring module, a control module and an alarm module. The control module is equipped with a stirring mode and a feeding mode; the stirring mode is used to control the stirring and mixing process, and the feeding mode is used to control the feeding process. The data processing module analyzes and judges the uniformity of material mixing and whether there are any abnormalities such as local solidification based on the monitoring data; according to the analysis results, it sends preset instructions to the control module to adjust the mixing parameters or feeding method. The monitoring module is connected to the pressure sensor and is used to collect monitoring data from the mixing equipment. The monitoring data includes stirring resistance, material temperature, and additive dosage.

9. The preparation process of a polyvinyl chloride cable material according to claim 8, characterized in that: The specific workflow of the stirring mode includes: the control module adjusts the speed of the stirring shaft and the stirring time according to the preset stirring parameters to ensure that the material is fully mixed in the mixing tank. At the same time, the monitoring module monitors the stirring resistance and material temperature in real time through the monitoring plate (3). When the local resistance is abnormally increased or the material temperature drops, it is judged as local solidification. The working state of the vibrating feeding part (5) near the local solidification area is adjusted to perform vibration and heating treatment on the local solidification area.

10. The preparation process of a polyvinyl chloride cable material according to claim 8, characterized in that: The specific workflow of the feeding mode includes: the control module adjusts the vibration frequency, feeding speed and feeding amount of the vibrating feeding section (5) according to the preset feeding parameters. At the same time, the monitoring module monitors the amount of additives in real time and sends the feeding amount data to the data processing module for analysis. When the feeding amount in the set time period does not meet the preset requirements, the working state of the vibrating feeding section (5) is adjusted, the vibration frequency is increased and the working time of the electromagnet (54) is extended to extend the nozzle exposure time when the vibrating block (52) vibrates.

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