Preparation system and method of rat-proof and termite-proof PVC sheath material

Abstract

This invention relates to the field of organic polymer compound preparation technology. The invention provides a preparation system and method for rodent- and ant-repellent PVC sheath material, including a server, a PVC base material mixing module, a mixing evaluation module, an adding module, an extrusion module, an extrusion analysis module, ant-repellent additives, and rodent-repellent additives. The mixing module mixes the PVC base material and the added mixtures to form a mixed product base material. The mixing evaluation unit evaluates the mixing state of the mixing module to form an evaluation result. The adding module adds ant-repellent additives and rodent-repellent additives to the mixing module. The extrusion module extrudes the qualified mixed product base material to form PVC sheath material, and cools the PVC sheath material during the extrusion process. The extrusion analysis module collects extrusion data from the extrusion process of the extrusion module and analyzes the extrusion process based on the extrusion data to form an analysis result. If the analysis result does not meet the requirements, the extrusion module is triggered to adjust the extrusion parameters.

Description

Technical Field

[0001] This invention relates to the field of organic polymer compound preparation technology, and in particular to a preparation system and method for rodent- and ant-proof PVC sheath material. Background Technology

[0002] Although some domestic manufacturers can produce environmentally friendly, flame-retardant, termite-proof PVC insulation sheathing materials with a temperature resistance of 90℃, they do not have rodent-proof properties, which limits their application range. Furthermore, their volume resistivity is relatively low, which cannot meet the higher electrical performance requirements of mainstream cable manufacturers for insulation sheathing materials.

[0003] Existing technologies involve adding rodent repellents, such as cycloheximide and terpene monomers, to the plastic material of cable sheaths. These repellents are primarily used for "poisoning," resulting in a lose-lose situation where the power transmission cable is damaged and the rodents are poisoned. However, this does not prevent the cable from being gnawed by rodents or ants, and thus fails to achieve the purpose of rodent and ant prevention.

[0004] Although some domestic manufacturers can produce environmentally friendly, rodent-proof, and termite-proof PVC insulation sheaths with a temperature resistance of 90℃, they lack monitoring and testing of the preparation process, making it impossible to accurately evaluate the preparation of the sheath material.

[0005] This invention was developed to address the common problems in the field, such as a lack of evaluation methods, large evaluation errors, poor rodent and ant prevention effects, and poor uniformity in preparation. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of current methods by proposing a rodent- and ant-proof PVC sheath material and its preparation method.

[0007] To overcome the shortcomings of the prior art, the present invention adopts the following technical solution:

[0008] A system for preparing rodent- and termite-repellent PVC sheath material includes a server and a PVC base material. The system further includes a mixing module, a mixing evaluation module, an additive module, an extrusion module, an extrusion analysis module, an ant repellent additive, and a rodent repellent additive. The server is connected to the mixing module, the mixing evaluation module, the additive module, the extrusion module, and the extrusion analysis module, respectively.

[0009] The mixing module mixes the PVC base material and the added additives to form a mixed product base material. The mixing evaluation unit evaluates the mixing state of the mixing module to form an evaluation result. The adding module adds the ant repellent additive and the rodent repellent additive to the mixing module. The extrusion module extrudes the qualified mixed product base material to form a PVC sheath material and cools it during the PVC sheath material extrusion process. The extrusion analysis module collects extrusion data of the extrusion process of the extrusion module and analyzes the extrusion process based on the extrusion data to form an analysis result. If the analysis result does not meet the requirements, the extrusion module is triggered to adjust the extrusion parameters.

[0010] The mixing module includes a mixing chamber, a mixing unit, and a status detection unit. The mixing unit is disposed in the mixing chamber and mixes the PVC base material, added mixture, ant repellent additive, and rodent repellent additive that are put into the mixing chamber. The status detection unit monitors the temperature data in the mixing chamber and the actual absorption intensity of the mixed mixture in the near-infrared region.

[0011] Optionally, the mixing unit includes a stirring rod, a stirring drive mechanism, and at least two auxiliary stirring plates. The at least two auxiliary stirring rods are symmetrically arranged on the stirring rod. One end of the stirring rod is connected to the stirring drive mechanism to form a stirring section. The stirring section is disposed in the stirring chamber, and the other end of the stirring rod extends to one side of the stirring chamber.

[0012] Optionally, the state detection unit includes a first temperature sensor, an online NIR spectrometer, and a data storage device. The first temperature sensor collects temperature data in the stirring chamber, the online NIR spectrometer collects the actual absorption intensity of the mixed material at wavelengths in the near-infrared region, and the data storage device stores the temperature data collected by the first temperature sensor and the actual absorption intensity data at wavelengths in the near-infrared region collected by the online NIR spectrometer.

[0013] Optionally, the mixing evaluation module acquires the actual absorption intensity data of the NIR online spectrometer at wavelengths in the near-infrared region, and calculates the mixing uniformity index (Uniformity_Index) of the mixture according to the following formula:

[0014]

[0015] In the formula, n is the number of components in the mixture, Aactual i Let i be the actual NIR absorption intensity of the i-th component at the wavelength in the near-infrared region. iThe ideal NIR absorption intensity of the i-th component at a wavelength in the near-infrared region is given by a preset standard or obtained through previous calibration experiments.

[0016] If the uniformity index is lower than the set monitoring threshold Range, the qualified mixed product substrate is sent into the extrusion module for extrusion.

[0017] Optionally, the extrusion module includes an extrusion unit, a coating unit, and a cooling unit. The extrusion unit extrudes the mixed and qualified product substrate, the coating unit coats the extruded PVC sheath material with a protective layer, and the cooling unit cools the extruded PVC sheath material.

[0018] The extrusion unit includes an extrusion chamber, a die, a traction component, a screw, and an extrusion drive mechanism. The extrusion drive mechanism is driven and connected to the screw so that the screw spirally extrudes the melted and uniformly mixed product base toward one side of the die. The traction component pulls the extruded PVC sheath material so that the extruded PVC sheath material passes through the cooling unit at a constant speed.

[0019] Optionally, the extrusion analysis module includes an extrusion detection unit and an extrusion analysis unit. The extrusion detection unit is set on the traction path of the traction member and collects temperature data and thickness data of the extruded PVC sheath material. The extrusion analysis unit analyzes the PVC sheath material based on the collected thickness data.

[0020] The extrusion detection unit includes a temperature detection component, an adjustment component, and a thickness detection component. The temperature detection component collects the temperature of the PVC sheath material at the extrusion nozzle. The thickness detection component collects thickness data of the extruded PVC sheath material at multiple angles. The adjustment component adjusts the position of the thickness detection component so that the thickness detection component can collect the thickness data of the extruded PVC sheath material.

[0021] Optionally, the extrusion analysis unit acquires the temperature and thickness data collected by the extrusion detection unit, and calculates the extrusion quality index (EQI) of the extruded PVC sheath material according to the following formula:

[0022]

[0023] In the formula, V max V represents the maximum speed that the extrusion module can achieve under optimal conditions. current T represents the current extrusion speed. current T is the current extrusion temperature. ideal For the ideal extrusion temperature, Trange The acceptable deviation range for temperature is defined as the temperature deviation from T. ideal Maximum allowed value, D factor For thickness factor;

[0024] If the extrusion quality index (EQI) exceeds the set quality assessment threshold (Quality), then the quality of the currently extruded PVC sheath material meets the set requirements, and the extrusion parameters of the extrusion module are maintained.

[0025] A method for preparing rodent- and ant-proof PVC sheath material, the method comprising the following steps:

[0026] S1: Premix the PVC base material, plasticizer, stabilizer, filler, toughening agent, antioxidant and colorant evenly;

[0027] S2. Heat the mixture in the mixing module to 150℃~160℃ and perform hot mixing for 4~5 minutes to ensure that all components are fully dispersed and uniformly formed into PVC mixture;

[0028] S3. The mixing uniformity in step S2 is evaluated by the mixing evaluation module. If the mixing uniformity meets the set standard, the process is allowed to proceed to step S4; otherwise, mixing continues.

[0029] S4. After cooling to 80℃~90℃, add polymerized peppermint oil and polymerized eucalyptus oil, and cold mix for 5~6 minutes to ensure that the peppermint oil, eucalyptus oil and PVC mixture are fully mixed to form the product base material;

[0030] S5. The mixed product substrate is formed using an extrusion module according to specific temperature and pressure parameters.

[0031] Optionally, the method for preparing the rodent-proof and ant-proof PVC sheath material further includes: heating the uniformly mixed product substrate to form a molten state and then supplying it to the extrusion module.

[0032] Optionally, the method for preparing the rodent- and ant-proof PVC sheath material further includes: coating peppermint oil, eucalyptus oil, and capsaicin through the coating unit.

[0033] The beneficial effects achieved by this invention are:

[0034] 1. Through the cooperation of the mixing evaluation module and the mixing module, the mixing state of PVC base material and added mixture can be accurately controlled, ensuring that the whole system has the advantages of high mixing reliability and good mixing stability;

[0035] 2. By using traction components to assist in the traction of the extruded PVC sheath material, the PVC sheath material can be more stable and reliable during the traction process, thereby improving the overall production quality and extrusion efficiency of the PVC sheath material.

[0036] 3. Through the cooperation of the cooling unit and the coating unit, the extruded PVC sheath material can be cooled and coated with polymerized peppermint oil, polymerized eucalyptus oil and capsaicin to form a protective layer, thereby improving the protective effect of the PVC sheath material.

[0037] 4. By combining the extrusion analysis module and the extrusion module, the production process evaluation of the sheath material is made more accurate, and the whole system has the advantages of accurate evaluation methods, high evaluation accuracy and good preparation uniformity.

[0038] 5. The cooperation between the mixing module and the extrusion module makes the preparation of PVC sheath material more efficient and ensures the quality and stability of the PVC sheath material. Attached Figure Description

[0039] The invention will be further understood from the following description taken in conjunction with the accompanying drawings. The components in the drawings are not necessarily drawn to scale, but rather the emphasis is on illustrating the principles of the embodiments. In different views, the same reference numerals designate the same parts.

[0040] Figure 1 This is a schematic diagram of the overall block shape of the present invention.

[0041] Figure 2 This is a schematic diagram of the process for calculating the mixing uniformity index using the mixing evaluation module of the present invention.

[0042] Figure 3 This is a block diagram of the extrusion unit, traction component, cooling unit, coating unit, and smoothing evaluation module of the present invention.

[0043] Figure 4 This is a schematic diagram of the structure of the hybrid unit of the present invention.

[0044] Figure 5 for Figure 4 Schematic diagram of cross-section at point AA.

[0045] Figure 6 This is a top view of the extrusion module of the present invention.

[0046] Figure 7 for Figure 6 Schematic diagram of cross-section at point BB.

[0047] Figure 8 This is a partial structural schematic diagram of the traction component of the present invention.

[0048] Figure 9This is a schematic diagram of the thickness detection component of the present invention for collecting thickness data of extruded PVC sheath material.

[0049] Figure 10 This is a schematic diagram of a scenario where the cooling unit of the present invention cools the extruded PVC sheath material.

[0050] Figure 11 This is a schematic diagram of a scenario where the coating unit of the present invention coats the extruded PVC sheath material.

[0051] Figure 12 This is a schematic diagram illustrating an application scenario where the smoothness sampling unit of the present invention collects smoothness data from extruded PVC sheath material.

[0052] Explanation of reference numerals in the attached drawings: 1. Extrusion unit; 2. Extrusion chamber; 3. Extrusion drive mechanism; 4. Stirring rod; 5. Supply unit; 6. Screw; 7. Traction seat; 8. Sliding seat; 9. PVC sheath material; 10. Clamping airbag; 11. Coating unit; 12. Cooling unit; 13. Thickness detection component; 14. Mold; 15. Limiting rod; 16. Rotation drive mechanism; 17. Adjusting seat; 18. Ultrasonic thickness gauge; 19. Coating brush; 20. Rotating component; 21. Passage chamber; 22. Rotating seat; 23. Sampling component; 24. Mixing chamber; 25. Auxiliary stirring plate; 26. Stirring drive mechanism; 27. Smoothing sampling unit; 28. Conveyor belt. Detailed Implementation

[0053] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the spirit of the present invention. Furthermore, the accompanying drawings of the present invention are for simple illustrative purposes only and are not depictions of actual dimensions; this is stated beforehand. The following embodiments will further describe the relevant technical content of the present invention in detail, but the disclosed content is not intended to limit the scope of protection of the present invention.

[0054] Example 1: According to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 and Figure 12This embodiment provides a preparation system for rodent- and termite-resistant PVC sheath material 9. The system includes a server and a PVC base material. It also includes a mixing module, a mixing evaluation module, an additive module, an extrusion module, an extrusion analysis module, a termite repellent additive, and a rodent repellent additive. The server is connected to the mixing module, mixing evaluation module, additive module, extrusion module, and extrusion analysis module, respectively, allowing intermediate or process data from these modules to be transmitted to the server's database for storage, querying, or retrieval.

[0055] The mixing module mixes the PVC base material and the added additives to form a mixed product base material. The mixing evaluation unit evaluates the mixing state of the mixing module to form an evaluation result. The adding module adds the ant repellent additive and the rodent repellent additive to the mixing module. The extrusion module extrudes the qualified mixed product base material to form PVC sheath material 9 and cools it during the extrusion process. The extrusion analysis module collects extrusion data of the extrusion process of the extrusion module and analyzes the extrusion process based on the extrusion data to form an analysis result. If the analysis result does not meet the requirements, the extrusion module is triggered to adjust the extrusion parameters.

[0056] The mixing module includes a mixing chamber 24, a mixing unit, and a status detection unit. The mixing unit is disposed in the mixing chamber 24 and mixes the PVC base material, the added mixture, the ant repellent additive, and the rodent repellent additive that are put into the mixing chamber 24. The status detection unit detects the temperature data in the mixing chamber 24 and the actual absorption intensity of the mixed mixture in the near-infrared region.

[0057] In this embodiment, the so-called mixed product substrate includes PVC base material, rodent repellent additive, ant repellent additive, plasticizer, stabilizer, filler, toughening agent, antioxidant and colorant;

[0058] The components of the mixed product substrate by weight are as follows:

[0059] PVC base material: 80-85% of the total weight;

[0060] Plasticizer: 2%-3% of total weight;

[0061] Stabilizer: 2%-3% of total weight;

[0062] Filler: 2%-3% of total weight;

[0063] Toughening agent: 1%-2% of total weight;

[0064] Antioxidants: 0.1%-0.5% of total weight;

[0065] Colorant: 0.1%-0.5% of total weight;

[0066] Rodent repellent additive: 1%-2% of total weight;

[0067] Ant repellent additive: 1%-2% of total weight;

[0068] The rodent repellent additive is peppermint oil, and the ant repellent additive is eucalyptus oil. The polymerized peppermint oil or polymerized eucalyptus oil formed by polymerization has heat-resistant properties, so that it will not volatilize during extrusion or cooling and will remain in the mixed product substrate, so that the extruded PVC sheath material 9 has the effect of repelling rodents and ants.

[0069] The rodent-proof and ant-proof PVC sheath material preparation system also includes a central processing unit (CPU). The CPU is connected to a server, a mixing module, a mixing evaluation module, an additive module, an extrusion module, and an extrusion analysis module. The CPU provides centralized control over the mixing module, mixing evaluation module, additive module, extrusion module, and extrusion analysis module to improve the collaborative operation between the various modules in the system.

[0070] The addition module includes two storage cavities and a supply unit 5. The two storage cavities store the ant repellent additive and the rodent repellent additive respectively. The supply unit 5 is respectively disposed in the two storage cavities and supplies the ant repellent additive and the rodent repellent additive stored in the storage cavities to the mixing cavity 24.

[0071] The supply unit 5 includes a flow meter and a supply pipe. One end of the supply pipe is connected to the storage chamber, and the other end of the supply pipe is connected to the storage chamber. The flow meter is installed in the supply pipe and the ant repellent additive and rodent repellent additive added to the mixing chamber 24 are metered to achieve precise control of the dosage of the ant repellent additive and rodent repellent additive added to the mixing chamber 24.

[0072] Optionally, the mixing unit includes a stirring rod 4, a stirring drive mechanism 26, and at least two auxiliary stirring plates 25. At least two auxiliary stirring rods 4 are symmetrically arranged on the stirring rod 4. One end of the stirring rod 4 is connected to the stirring drive mechanism 26 to form a stirring part. The stirring part is disposed in the stirring chamber, and the other end of the stirring rod 4 extends to one side of the stirring chamber.

[0073] The state detection unit is located inside the stirring rod 4 or the mixing chamber 24;

[0074] At least two auxiliary mixing plates 25 ensure that the PVC base material and the added mixture are fully blended, improving the uniformity and efficiency of the mixing process;

[0075] Optionally, the state detection unit includes a first temperature sensor, an online NIR spectrometer, and a data storage device. The first temperature sensor collects temperature data in the stirring chamber, the online NIR spectrometer collects the actual absorption intensity of the mixed material at wavelengths in the near-infrared region, and the data storage device stores the temperature data collected by the first temperature sensor and the actual absorption intensity data at wavelengths in the near-infrared region from the online NIR spectrometer.

[0076] In this embodiment, the method for online monitoring of mixing uniformity is near-infrared spectroscopy (NIR), especially during mixing and compounding processes, because it can quickly and non-destructively measure various properties of materials; an online NIR spectrometer, equipped with a probe, can be directly installed on a mixer, extruder, or production line to monitor the mixing uniformity of PVC sheath material 9 in real time;

[0077] During the mixing process, the mixing module needs to heat the mixing chamber 24 to ensure that the mixed PVC base material and the added mixture are fully stirred. At the same time, the stirring rod 4 and at least two auxiliary plates are provided with an anti-stick coating so that the molten mixture will not stick to the stirring rod 4 and at least two auxiliary plates during the stirring process.

[0078] Optionally, the mixing evaluation module acquires the actual absorption intensity data of the NIR online spectrometer at wavelengths in the near-infrared region, and calculates the mixing uniformity index (Uniformity_Index) of the mixture according to the following formula:

[0079]

[0080] In the formula, n is the number of components in the mixture, Aactual i Let i be the actual NIR absorption intensity of the i-th component at the wavelength in the near-infrared region. i The ideal NIR absorption intensity of the i-th component at a wavelength in the near-infrared region is given by a preset standard or obtained through previous calibration experiments.

[0081] Near-infrared (NIR) light is an electromagnetic wave that lies between visible light (VIS) and mid-infrared (MIR). According to ASTM (American Society for Testing and Materials), it refers to electromagnetic waves with wavelengths in the range of 780–2526 nm. Conventionally, the near-infrared region is further divided into two areas: near-infrared short wave (780–1100 nm) and near-infrared long wave (1100–2526 nm).

[0082] If the uniformity index is lower than the set monitoring threshold Range, the qualified mixed product substrate is sent into the extrusion module for extrusion.

[0083] If the uniformity index is higher than the set monitoring threshold Range, the mixing process continues.

[0084] The monitoring threshold Range is set by the system or the operator according to the actual situation. This is a technical means well known to those skilled in the art. Those skilled in the art can consult relevant technical manuals to learn about this technology. Therefore, it will not be described in detail in this embodiment.

[0085] Through the cooperation of the mixing evaluation module and the mixing module, the mixing state of PVC base material and added mixture can be accurately controlled, ensuring that the whole system has the advantages of high mixing reliability and good mixing stability.

[0086] In this embodiment, experiments are first conducted to find the specific absorption peaks of each component of the PVC sheath mixture in NIR, and then calibration experiments are performed to determine the ideal absorption intensity. After that, the absorption intensity can be measured online in real time, and the uniformity index can be calculated using the above formula to evaluate the mixing uniformity.

[0087] The steps for determining specific absorption peaks in NIR and calibrating the experiment are as follows:

[0088] 1) Single-component NIR measurement

[0089] Objective: To determine the characteristic absorption peaks of PVC and rodent / ant repellent additives;

[0090] step:

[0091] a. Take samples of PVC and rodent / ant repellent additives respectively;

[0092] b. Scan each individual sample using an NIR spectrometer;

[0093] c. Mark each obvious absorption peak on the absorption spectrum;

[0094] d. Select the most obvious peak that does not overlap with other components as the characteristic absorption peak of that component;

[0095] 2) Calibration Experiment

[0096] Objective: To determine the ideal absorption intensity of PVC and rodent repellent and ant repellent additives at various concentrations;

[0097] step:

[0098] a. Prepare a series of mixed samples with known concentrations, for example, 100% PVC, 90% PVC + 10% additive, 80% PVC + 20% additive, and so on;

[0099] b. Measure the absorption intensity of each mixed sample using an NIR spectrometer;

[0100] c. Draw a graph where the x-axis represents the concentration of the additive and the y-axis represents the corresponding NIR absorption intensity;

[0101] d. Use these data to fit a linear or nonlinear relationship to represent the relationship between additive concentration and its NIR absorption intensity at wavelengths in the near-infrared region;

[0102] e. This line or curve can be used to estimate the concentration of additives in the mixture during actual production;

[0103] 3) Determine the ideal absorption intensity

[0104] Once the above calibration is completed, you can determine the ideal absorption strength for any specific mixture concentration; for example, if your goal is to mix 80% PVC and 20% additives (such as ant repellent and rodent repellent additives), simply refer to the calibration curve to find the corresponding ideal absorption strength value.

[0105] Optionally, the extrusion module includes an extrusion unit 1, a coating unit 11, and a cooling unit 12. The extrusion unit 1 extrudes the mixed and qualified product substrate, the coating unit 11 coats the extruded PVC sheath material 9 with a protective layer, and the cooling unit 12 cools the extruded PVC sheath material 9 from the extrusion unit 1.

[0106] The extrusion unit 1 includes an extrusion chamber 2, a mold 14, a traction component, a screw 6, and an extrusion drive mechanism 3. The extrusion drive mechanism 3 is driven to the screw 6 so that the screw 6 melts and uniformly mixes the product substrate and spirally extrudes it to one side of the mold 14. The traction component pulls the extruded PVC sheath material 9 so that the extruded PVC sheath material 9 passes through the cooling unit 12 at a constant speed.

[0107] In addition, the extrusion unit 1 also includes a mold cavity, and the mold 14 is placed in the mold cavity. When the screw 6 extrudes the mixed and molten product substrate, the product substrate can be extruded according to the size defined by the mold 14 through the mold 14.

[0108] Different models of PVC sheath material 9 are selected for different preparations, so they will not be described in detail in this embodiment.

[0109] The traction component includes a traction seat 7, a clamping airbag 10, an inflation pump, a sliding rail, a sliding seat 8, and a sliding drive mechanism. The traction seat 7 is configured as a hollow passage cavity 21, and the inner wall of the passage cavity 21 is provided with a hidden cavity. The inflation pump is connected to the clamping airbag 10 and inflates the clamping airbag 10. The inflation pump and the clamping airbag 10 are hidden in the hidden cavity. The traction seat 7 is disposed on the sliding seat 8, and the sliding seat 8 is slidably connected to the sliding rail. The sliding drive mechanism is disposed on the sliding seat 8 and drives the sliding seat 8 to slide along the direction of the sliding rail.

[0110] The traction process of the traction component is as follows:

[0111] The sliding drive mechanism drives the sliding seat 8 to move to the initial end of the sliding track. At this time, the air pump inflates the clamping airbag 10 so that the clamping airbag 10 can clamp the extruded PVC sheath material 9 and trigger the sliding drive mechanism to drive the sliding seat 8 to slide along the direction of the sliding track, so that the sliding seat 8 moves towards the end of the moving track, thereby realizing continuous traction of the extruded PVC sheath material 9.

[0112] When it reaches the end, the clamping airbag 10 is deflated (by an electronic control valve on the clamping airbag 10) to clamp the extruded PVC sheath material 9, and the sliding seat 8 is driven back to the initial end by the sliding drive mechanism, and the airbag is inflated again to realize the reciprocating clamping and transportation of the extruded PVC sheath material 9.

[0113] In this embodiment, the extruded PVC sheath material 9 is pulled by at least two pulling members, and the pulling of the at least two pulling members is alternating with each other;

[0114] Meanwhile, the cooling unit 12 and the coating unit 11 are arranged on the traction path of the traction member;

[0115] The extruded PVC sheath material 9 is assisted by a traction component, which makes the PVC sheath material 9 more stable and reliable during the traction process, thereby improving the overall production quality and extrusion efficiency of the PVC sheath material 9.

[0116] Meanwhile, the clamping airbags provide better surface quality protection for the extruded sheath material 9, thus overcoming the defect of clamping marks on the surface of the sheath material 9 caused by conventional mechanical clamping.

[0117] Furthermore, due to the buffer between the airbag and the extruded sheath material, and the surface deformation of the airbag during clamping, the stability and reliability of clamping are improved, ensuring the efficiency and accuracy of pulling the extruded sheath material 9. The cooling unit 12 includes a cooling chamber, cooling pipes, a water tank, a water pump, and at least two cooling nozzles. The cooling chamber is located on the outer periphery of the traction member. One end of the cooling pipe is connected to the cooling nozzle, and the other end is connected to the water pump, which is located in the water tank.

[0118] At least two cooling nozzles are symmetrically arranged on both sides of the extruded PVC sheath material 9 to atomize the water supplied from the water tank and spray it onto the PVC sheath material 9, so as to achieve the purpose of cooling the extruded PVC sheath material 9.

[0119] The coating unit 11 is located after the cooling process and is located on the traction path of the PVC sheath material 9. The coating unit 11 coats the cooled PVC sheath material 9 with peppermint oil, eucalyptus oil and capsaicin to make the PVC sheath material 9 rodent and ant resistant.

[0120] The coating unit 11 includes a coating seat, a coating brush 19, a liquid supply pipe and a liquid storage tank. The coating seat is provided with a passage cavity 21 for the extruded PVC sheath material 9 to pass through. The coating brush 19 is disposed on the inner wall of the passage cavity 21 and coats the PVC sheath material 9 pulled by the traction member.

[0121] The coating unit 11 further includes a rotating component 20, which rotates and adjusts the positions of the coating seat and the coating brush 19 so that the coating brush 19 can coat the peppermint oil, eucalyptus oil and capsaicin onto the outer peripheral wall of the PVC sheath material 9.

[0122] The rotating component 20 drives the coating brush 19 to rotate along the axis of the passage cavity 21 of the coating seat. The structure of the rotating component 20 is a technical means well known to those skilled in the art. Those skilled in the art can consult relevant technical manuals to learn about this technology, so it will not be described in detail in this embodiment.

[0123] The liquid storage tank stores the peppermint oil, eucalyptus oil, and capsaicin (liquid) used for coating. One end of the liquid supply pipe is connected to the liquid storage tank, and the other end of the liquid supply pipe is connected to the coating brush 19, so that the peppermint oil, eucalyptus oil, and capsaicin can be evenly coated on the outer periphery of the PVC sheath material 9.

[0124] Meanwhile, the coating brush 19 is symmetrically arranged on the outer periphery of the PVC sheath material 9;

[0125] Through the cooperation of the cooling unit 12 and the coating unit 11, the extruded PVC sheath material 9 can be cooled and coated with polymerized peppermint oil, polymerized eucalyptus oil and capsaicin to form a protective layer, thereby improving the protective effect of the PVC sheath material 9.

[0126] Optionally, the extrusion analysis module includes an extrusion detection unit and an extrusion analysis unit. The extrusion detection unit is set on the traction path of the traction member and collects the temperature data and thickness data of the extruded PVC sheath material 9. The extrusion analysis unit analyzes the PVC sheath material 9 based on the collected thickness data.

[0127] The extrusion detection unit includes a temperature detection component, an adjustment component, and a thickness detection component 13. The temperature detection component collects the temperature of the PVC sheath material 9 at the extrusion port. The thickness detection component 13 collects thickness data of the extruded PVC sheath material 9 at multiple angles. The adjustment component adjusts the position of the thickness detection component 13 so that the thickness detection component 13 can collect the thickness data of the extruded PVC sheath material 9.

[0128] The adjustment component includes an adjustment seat 17, a rotation drive mechanism 16, a support seat, an identification probe, and several angle markers. The adjustment seat 17 supports the thickness detection component and is circular. When the traction component pulls the extruded PVC sheath material 9, the extruded PVC sheath material 9 passes through the circular adjustment seat 17, and the thickness detection component 13 can detect the thickness of the extruded PVC sheath material 9. The rotation drive mechanism 16 is drivenly connected to the adjustment seat 17 and is mounted on the support seat so that the rotation drive mechanism 16 rotates along the axis of the adjustment seat 17.

[0129] The adjusting seat 17 is provided with a limiting groove, and the support seat is provided with a limiting rod 15. One end of the limiting rod 15 is connected to the support seat, and the other end of the limiting rod 15 is slidably connected to the limiting groove, so that the adjusting seat 17 can be stably in an upright state.

[0130] Each of the aforementioned angle markers is disposed on the outer wall of the support base. When the adjustment base 17 rotates, the recognition probe identifies each of the aforementioned angle markers to realize the rotation angle identification. When the adjustment base 17 rotates, the recognition probe identifies the position of the recognition markers before rotation and detects the markers with the set rotation angle in real time. If the angle marker corresponding to the position of the set rotation angle is captured, it is fed back to the central processing unit, which then controls the rotation drive mechanism 16 to stop driving the adjustment base 17, so that the adjustment base 17 can be stabilized at that position, and controls the thickness detection component 13 to detect the angle.

[0131] In this embodiment, the thickness of the extruded PVC sheath material 9 is measured every 30°.

[0132] The thickness detection component 13 includes an ultrasonic thickness gauge 18 and a data transmitter. The ultrasonic thickness gauge 18 measures the thickness of the extruded PVC sheath material 9, and the data transmitter transmits the data detected by the thickness sensor to the extrusion analysis unit.

[0133] The temperature detection component includes a second temperature sensor and a mounting base. The mounting base supports the second temperature sensor, which collects temperature data of the PVC sheath material 9 at the extrusion port.

[0134] The fixing seat is located on one side of the extrusion port of the mold 14 and collects the temperature of the extruded PVC sheath material 9.

[0135] Optionally, the extrusion analysis unit acquires the temperature and thickness data collected by the extrusion detection unit, and calculates the extrusion quality index (EQI) of the extruded PVC sheath material 9 according to the following formula:

[0136]

[0137] In the formula, V max V represents the maximum speed that the extrusion module can achieve under optimal conditions. current The current extrusion speed, T, can be directly obtained from the state of the extrusion unit. current The current extrusion temperature, T, is obtained from the second temperature sensor. ideal T is the ideal extrusion temperature required for the produced PVC sheath material. range The acceptable temperature deviation range in the production process of PVC sheath material is defined as the temperature deviation T. ideal Maximum allowed value, D factor The thickness factor is calculated using the following formula:

[0138]

[0139] In the formula, D current It is the thickness currently measured, D ideal It is the ideal thickness required for the PVC sheath material being produced, D range It refers to the acceptable tolerance range of thickness in the production process of the PVC sheath material;

[0140] If the extrusion quality index EQI exceeds the set quality assessment threshold Quality, then the quality of the currently extruded PVC sheath material 9 meets the set requirements, and the extrusion parameters of the extrusion module are maintained.

[0141] If the extrusion quality index EQI is lower than the set quality assessment threshold Quality, the quality of the currently extruded PVC sheath material 9 does not meet the set requirements, triggering the extrusion module to adjust the extrusion parameters;

[0142] The quality assessment threshold, Quality, is set by the system or operator based on the actual situation of producing different types of cables. This is a technical method well known to those skilled in the art, who can consult relevant technical manuals to learn about this technology. Therefore, it will not be described in detail in this embodiment.

[0143] By combining the extrusion analysis module and the extrusion module, the production process evaluation of the sheath material is made more accurate, and the whole system has the advantages of accurate evaluation methods, high evaluation accuracy and good preparation uniformity.

[0144] In this embodiment, the extrusion parameters of the extrusion module include, but are not limited to, the following: extrusion speed, extrusion temperature, and extrusion thickness;

[0145] A method for preparing rodent- and ant-proof PVC sheath material 9, the method comprising the following steps:

[0146] S1: Premix the PVC base material, plasticizer, stabilizer, filler, toughening agent, antioxidant and colorant evenly;

[0147] S2. Heat the mixture in the mixing module to 150℃~160℃ and perform hot mixing for 4~5 minutes to ensure that all components are fully dispersed and uniformly formed into PVC mixture;

[0148] S3. The mixing uniformity in step S2 is evaluated by the mixing evaluation module. If the mixing uniformity meets the set standard, the process is allowed to proceed to step S4; otherwise, mixing continues.

[0149] S4. After cooling to 80℃~90℃, add polymerized peppermint oil and polymerized eucalyptus oil, and cold mix for 5~6 minutes to ensure that the peppermint oil, eucalyptus oil and PVC mixture are fully mixed to form the product base material;

[0150] S5. The mixed product substrate is formed using an extrusion module according to specific temperature and pressure parameters;

[0151] Optionally, the preparation method of the rodent-proof and ant-proof PVC sheath material 9 further includes: heating the uniformly mixed product substrate to form a molten state and then supplying it to the extrusion module;

[0152] Optionally, the preparation method of the rodent-proof and ant-proof PVC sheath material 9 further includes: coating peppermint oil, eucalyptus oil and capsaicin through the coating unit 11;

[0153] The above preparation method makes the preparation efficiency of the PVC sheath material 9 higher, and makes the evaluation method of PVC sheath material 9 more accurate, with smaller evaluation error and better rodent and ant protection effect.

[0154] Example 2: This example should be understood as including all the features of any of the foregoing examples, and further improving upon them, according to... Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 and Figure 12 Furthermore, the rodent-proof and ant-proof PVC sheath material preparation system also includes a smoothness evaluation module, which collects the smoothness of the cooled PVC sheath material 9 and evaluates the smoothness of the PVC sheath material 9 based on the collected data.

[0155] The smoothness evaluation module includes a smoothness sampling unit 27 and a smoothness evaluation unit. The smoothness sampling unit 27 collects the actual smoothness of the PVC sheath material 9, and the smoothness evaluation unit evaluates the PVC sheath material 9 based on the data collected by the smoothness sampling unit 27.

[0156] The smooth sampling unit 27 includes a transport component, a rotating component, and a sampling component 23. The transport component is used to assist the traction component in transporting the PVC sheath material 9. The sampling component 23 samples the smoothness of the PVC sheath material 9 to form real-time smoothness data of the PVC sheath material 9. The rotating component adjusts the position of the sampling component 23.

[0157] The transport component includes a transport belt and a transport drive mechanism. The transport drive mechanism is driven to connect with the transport belt to form a transport section. The transport section is arranged on the traction route of the PVC sheath material 9 and provides auxiliary traction for the PVC sheath material 9.

[0158] The sampling component 23 is disposed on the transport path of the PVC sheath material 9 and samples various positions of the PVC sheath material 9 during the transport process.

[0159] The sampling component 23 includes a laser displacement sensor and a data buffer. The laser displacement sensor collects the actual smoothness data of the PVC sheath material 9, and the data buffer stores the actual smoothness data of the PVC sheath material 9 collected by the laser displacement sensor.

[0160] Among them, the laser displacement sensor can measure the undulations of the surface to obtain information about the surface roughness; generally, it calculates the distance to the surface by emitting a laser beam to the material surface and then measuring the time or angle of the laser beam reflected back to the sensor.

[0161] The rotating component includes a rotating base 22, a rotating track, a sampling base, a sampling drive mechanism, an identification probe, and at least one position marker. The rotating base 22 has a passage hole for the PVC sheath material 9 to pass through. The rotating track is disposed on the inner wall of the passage hole. At least one position marker is disposed on the rotating track and is evenly distributed along the direction of the rotating track. The sampling base is slidably connected to the rotating track. The sampling drive mechanism is disposed on the sampling base, so that the sampling base rotates along the direction of the rotating track to drive the sampling component to rotate, thereby collecting smoothness data at various positions of the PVC sheath material 9. The identification probe is disposed on the sampling base and extends toward the at least one position marker to identify the at least one position marker, thereby achieving precise control of the rotation position.

[0162] The steps for obtaining the smoothness value of the PVC sheath material using the laser displacement sensor are as follows:

[0163] S11. Installation and Calibration: Ensure the laser displacement sensor is stably fixed in a suitable position and perpendicular to the direction of movement of the sheath material. Calibrate the sensor using a standard sample with known smoothness to ensure data accuracy.

[0164] S12. Data Acquisition: As the PVC sheath material passes the sensor, the sensor continuously scans its surface and measures the distance between the material and the sensor. The measured data allows for the determination of the height variation or profile of the PVC sheath material's surface.

[0165] Specifically, in this application, the position of the laser displacement sensor is adjusted by rotating the component, that is, the laser displacement sensor is adjusted to rotate along the outer periphery of the PVC sheath material, so as to collect surface data at multiple positions of the PVC sheath material;

[0166] S13. Data Analysis: Use software or algorithms to analyze the collected data and draw a surface profile diagram of the PVC sheath material. Smoothness values ​​can be obtained by calculating changes in surface height, for example, by calculating the average surface height, the difference between the highest and lowest points, or other relevant indicators.

[0167] The specific method for calculating the smoothness value can be selected according to the specific application and requirements. For example, common roughness parameters such as Ra (arithmetic mean roughness) or Rz (maximum peak to valley height) can be selected.

[0168] S14. Result Evaluation: Evaluate the surface quality of the PVC sheath material based on the measured smoothness values.

[0169] If the smoothness value does not meet the requirements, production parameters such as temperature, pressure, or extrusion speed can be adjusted to optimize product quality.

[0170] S15. Continuous monitoring and feedback: The laser displacement sensor can continuously monitor the production of PVC sheath material and provide smoothness values ​​in real time.

[0171] With this data, the production process can be adjusted and optimized in real time to ensure stable product quality and meet requirements.

[0172] In summary, laser displacement sensors are a powerful tool that can provide high-precision and high-resolution smoothness data for the production of PVC sheathing materials, helping to optimize the production process and improve product quality.

[0173] The smoothness evaluation unit acquires the actual smoothness data of the PVC sheath material 9 collected by the smoothness acquisition unit and calculates the outer wall smoothness index SI of the PVC sheath material 9 according to the following formula:

[0174]

[0175] In the formula, S ideal S represents the ideal smoothness value for PVC sheath material, which is the target value to be achieved in the manufacturing of PVC sheath material. range During the preparation of the sheath material, the system's allowable smoothness deviation range is typically a small positive number, such as 0.1 or 0.05, depending on the manufacturing standards. avg The average smoothness of the PVC sheath material from multiple angles is calculated using the following formula:

[0176]

[0177] In the formula, S i Let be the actual smoothness value of the PVC sheath material measured from the i-th angle, where i = 1, 2, ..., n;

[0178] When SI=1, the surface smoothness is exactly the same as the ideal smoothness;

[0179] When SI is close to 0, it indicates that the surface smoothness deviates significantly from the ideal state.

[0180] The smoothness evaluation module assesses the external smoothness of the extruded PVC sheath material to improve the quality of PVC sheath material manufacturing, ensure the efficiency and reliability of the processing, and make the whole system have the advantages of accurate evaluation methods and high uniformity of preparation.

[0181] The content disclosed above is only a preferred and feasible embodiment of the present invention, and is not intended to limit the scope of protection of the present invention. Therefore, all equivalent technical changes made based on the content of the present invention specification and drawings are included within the scope of protection of the present invention. Furthermore, the elements therein can be updated as technology develops.

Claims

1. A preparation system of a rat- and termite-proof PVC sheathing material, the rat- and termite-proof PVC sheathing material preparation system comprising a server, and a PVC base material, characterized in that, The rat and termite prevention PVC sheath material preparation system further comprises a mixing module, a mixing evaluation module, an adding module, an extrusion module, an extrusion analysis module, a termite repelling additive, and a rat repelling additive, and the server is connected with the mixing module, the mixing evaluation module, the adding module, the extrusion module, and the extrusion analysis module respectively. The mixing module mixes the PVC base material and the added mixture to form a mixed product base material, the mixing evaluation module evaluates the mixing state of the mixing module to form an evaluation result, the adding module adds the termite repelling additive and the rat repelling additive to the mixing module, the extrusion module extrudes the product base material after mixing to form the PVC sheath material and cools the PVC sheath material during the extrusion process, and the extrusion analysis module collects extrusion data of the extrusion process of the extrusion module and analyzes the extrusion process according to the extrusion data to form an analysis result, and if the analysis result does not meet the requirements, the extrusion module is triggered to adjust the extrusion parameters. The mixing module comprises a mixing cavity, a mixing unit, and a state detection unit, the mixing unit is arranged in the mixing cavity, and the PVC base material, the added mixture, the termite repelling additive, and the rat repelling additive put into the mixing cavity are mixed, and the state detection unit detects the temperature data in the mixing cavity and the actual absorption intensity of the mixed mixture at the wavelength in the near-infrared region.

2. A rodent and termite resistant PVC jacketing compound preparation system as claimed in claim 1, wherein, The mixing unit comprises a stirring rod, a stirring driving mechanism, and at least two auxiliary stirring plates, the at least two auxiliary stirring plates are symmetrically arranged on the stirring rod, one end of the stirring rod is connected with the stirring driving mechanism to form a stirring part, the stirring part is arranged in a stirring cavity, and the other end of the stirring rod extends to one side of the stirring cavity.

3. A rodent and termite resistant PVC jacketing compound preparation system as claimed in claim 2, wherein, The state detection unit comprises a first temperature sensor, an NIR online spectrometer, and a data storage, the first temperature sensor collects the temperature data in the stirring cavity, the NIR online spectrometer collects the actual absorption intensity of the mixed material at the wavelength in the near-infrared region, and the data storage stores the temperature data collected by the first temperature sensor and the actual absorption intensity data of the NIR online spectrometer at the wavelength in the near-infrared region.

4. A rodent and termite resistant PVC jacketing compound preparation system as claimed in claim 3, wherein, The mixing evaluation module obtains the actual absorption intensity data of the NIR online spectrometer at the wavelength in the near-infrared region and calculates the mixing uniformity index of the mixture according to the following formula: ； where n is the number of components mixed, Aactual i is the actual NIR absorbance of the ith component at the wavelength in the near infrared region, Aideal i is the ideal NIR absorbance of the ith component at the wavelength in the near infrared region, the value of which is derived from a pre-set standard or through previous calibration experiments; If the mixing uniformity index Uniformity_Index is lower than the set monitoring threshold Range, the product base material after mixing is sent to the extrusion module for extrusion.

5. A system for the preparation of a rodent- and termite-resistant PVC jacketing material according to claim 4, characterized in that The extrusion module comprises an extrusion unit, a coating unit, and a cooling unit, the extrusion unit extrudes the product base material after mixing, the coating unit coats a protective layer on the extruded PVC sheath material, and the cooling unit cools the PVC sheath material extruded by the extrusion unit. The extrusion unit comprises an extrusion cavity, a die, a traction member, a screw and an extrusion driving mechanism, the extrusion driving mechanism is in driving connection with the screw, so that the screw spirally extrudes the melted and uniformly mixed product base to one side of the die, and the traction member pulls the extruded PVC sheath material, so that the extruded PVC sheath material passes through the cooling unit at a constant speed.

6. A rodent and termite resistant PVC jacketing compound preparation system as claimed in claim 5, wherein, The extrusion analysis module comprises an extrusion detection unit and an extrusion analysis unit, the extrusion detection unit is arranged on the traction route of the traction member and collects temperature data and thickness data of the extruded PVC sheath material, and the extrusion analysis unit analyzes the PVC sheath material according to the collected thickness data. The extrusion detection unit comprises a temperature detection member, an adjusting member and a thickness detection member, the temperature detection member collects the temperature of the PVC sheath material at the extrusion port, the thickness detection member collects thickness data of the extruded PVC sheath material at multiple angles, and the adjusting member adjusts the position of the thickness detection member, so that the thickness detection member collects the thickness data of the extruded PVC sheath material.

7. A system for the preparation of a rodent- and termite-resistant PVC jacketing material according to claim 6, characterized in that The extrusion analysis unit acquires the temperature data and the thickness data collected by the extrusion detection unit, and calculates the extrusion quality index EQI of the extruded PVC sheath material according to the following formula: ； where V max is the maximum speed that the extrusion module can reach in optimal conditions of the extrusion unit, V current is the current extrusion speed, T current is the current extrusion temperature, T ideal is the ideal extrusion temperature, T range is the acceptable range of deviation of the temperature, whose value is the maximum allowed value of the deviation of the temperature from T ideal , D factor is the thickness factor; If the extrusion quality index EQI exceeds the set quality evaluation threshold Quality, the quality of the currently extruded PVC sheath material meets the set requirements, and the extrusion parameters of the extrusion module are maintained.

8. A method for preparing a PVC sheathing material for rat and termite resistance, using the system for preparing a PVC sheathing material for rat and termite resistance according to claim 7, characterized in that, The rat and termite prevention PVC sheath material preparation method comprises the following steps: S1: uniformly premixing PVC base material, plasticizer, stabilizer, filler, toughening agent, antioxidant and colorant; S2, heating to 150-160 DEG C in the mixing module, and hot mixing for 4-5 minutes to ensure that each component is fully dispersed and uniformly formed into a PVC mixture; S3, the mixing uniformity in step S2 is evaluated by the mixing evaluation module, if the mixing uniformity meets the set standard, it is allowed to enter step S4, otherwise, continue mixing; S4, after cooling to 80-90 DEG C, adding polymeric peppermint oil and polymeric eucalyptus oil, and cold mixing for 5-6 minutes to ensure that the peppermint oil and eucalyptus oil are fully mixed with the PVC mixture to form a product base material; S5, the mixed product base material is formed by using the extrusion module according to certain temperature and pressure parameters.

9. A method of preparing a rodent- and termite-resistant PVC jacketing material according to claim 8, characterized in that, The rat and termite prevention PVC sheath material preparation method further comprises: heating the uniformly mixed product base material to form a molten state and then supplying it to the extrusion module.

10. A process for the preparation of a rodent and termite resistant PVC jacketing compound as claimed in claim 9, wherein, The rat and termite prevention PVC sheath material preparation method further comprises: coating peppermint oil, eucalyptus oil and capsaicin by the coating unit.

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