Batching system for multi-component silicone oil and use method of batching system

Abstract

The invention provides a batching system for multi-component silicone oil and a use method of the batching system. The batching system comprises a raw material supply unit; the automatic weighing unit comprises a metering pump communicated with each raw material supply unit and a metering tank connected with an outlet of the metering pump; the mixing unit comprises a mixing tank located below the metering tank, a stirrer arranged in the mixing tank and a temperature control module used for controlling the temperature in the mixing tank; the material storage unit comprises a middle storage tank and a first pumping mechanism for pumping the materials in the mixing tank to the middle storage tank; the feeding unit comprises a second pumping mechanism used for pumping the materials in the middle storage tank to a downstream coating device; and the central control unit is used for coordinating and controlling the automatic operation of the whole system. The batching system for the multi-component silicone oil can accurately feed materials, and the viscosity of the silicone oil and the stability of the subsequent coating weight are effectively guaranteed; manual operation is not needed in the batching process, full-automatic operation is achieved, and harm to human bodies is reduced.

Description

Technical Field

[0001] This invention relates to the field of automatic batching device technology, and in particular to a batching system for multi-component silicone oil and its method of use. Background Technology

[0002] In industrial fields such as release materials and coating processing, composite silicone oil is widely used as a key functional material. Its coating process typically requires the machine speed to be maintained at 200-500 m / min and the coating amount to be controlled at 0.8-1.2 g / m². Based on a typical production scenario with a width of 1.5 m, the hourly consumption of composite silicone oil is 14.4-54 kg. However, in actual production, due to the influence of product specifications and processing requirements, the width is often smaller and the machine speed is lower, resulting in a further reduction in the amount of silicone oil used per batch and a significant increase in production frequency, forming the typical production characteristics of "small batch, high frequency".

[0003] As a multi-component compound system, the stability of composite silicone oil is closely related to its storage conditions. In existing technologies, the bath life of composite silicone oil is significantly affected by temperature: it can only be stably stored for 4-6 hours at room temperature, extending to about 12 hours at 16℃, and maintaining an effective service life of up to 72 hours at 0℃. High temperatures accelerate its deterioration and failure. Cooling measures implemented to extend service life result in condensation on the inner wall of the storage tank. If this condensate mixes with the silicone oil system, it can cause white spots and blemishes on the surface of the coated product, severely affecting its appearance quality.

[0004] Meanwhile, the compounding process of composite silicone oil faces multiple technical challenges: First, the key component, platinum catalyst, is expensive and added in extremely low proportions, typically only 1% of the total mass. For example, when preparing 15 kg of composite silicone oil, only 150 g of catalyst is added. This trace component is prone to deviation in actual addition due to residue buildup on the weighing cylinder, directly causing fluctuations in product quality. Second, improper control of the catalyst addition rate can lead to localized agglomeration and crystallization. If the mixing is uneven, the crystallized particles will adhere to the coating roller surface after being pumped to the coating device with the silicone oil, causing spot-like missed coatings on the product. This not only disrupts the stability of the release force data but also reduces the overall product quality. Third, coating amount fluctuations are a common problem in the industry. Existing detection methods cannot provide real-time feedback on coating amount changes, making precise control difficult.

[0005] More importantly, the current mixing method for multi-component silicone oils in the industry is still mainly manual or semi-automatic. The specific process involves manually weighing each component using an electronic scale and then successively adding it to a mixing tank for mixing. This method has many inherent drawbacks: to facilitate manual weighing and unloading, the weight of each component in a single package must be controlled within 10 kg, resulting in complex packaging and significantly increasing packaging costs; small-sized packages are prone to incomplete unloading, with a large amount of material adhering to the inner wall and bottom of the package, leading to material waste; purely manual operation is prone to problems such as over-weighing and inaccurate addition, and frequent spillage during unloading further exacerbates waste; in addition, the cleaning process of the mixing equipment requires the use of volatile solvents such as ethyl acetate and petroleum solvent D40, which are highly irritating to the respiratory tract, skin, and eyes of operators, posing serious occupational health hazards.

[0006] In summary, existing composite silicone oils have significant technical defects in storage stability, mixing process, and coating quality control. These defects not only affect product quality stability and cause waste of materials and costs, but also pose safety hazards. They cannot meet the actual needs of industrial production for high efficiency, precision, and safety. Therefore, there is an urgent need for a technical solution that can solve the above problems. Summary of the Invention

[0007] The purpose of this invention is to provide a multi-component silicone oil formulation system and its usage method to solve the technical problems existing in the background art.

[0008] The technical solution adopted in this invention is as follows: A multi-component silicone oil batching system, comprising: multiple raw material supply units for storing silicone oil main agent, crosslinking agent, light stripping agent, heavy stripping agent and catalyst respectively; an automatic weighing unit, comprising a metering pump connected to each raw material supply unit and a metering tank connected to the outlet of the metering pump, for accurately weighing each component raw material according to a preset formula; a mixing unit, comprising a mixing tank located below the metering tank, a stirrer disposed in the mixing tank and a temperature control module for controlling the temperature inside the mixing tank; a storage unit, comprising an intermediate storage tank and a first pumping mechanism for pumping the material in the mixing tank to the intermediate storage tank; a feeding unit, comprising a second pumping mechanism for pumping the material in the intermediate storage tank to the downstream coating device; and a central control unit, electrically connected to the automatic weighing unit, mixing unit, storage unit and feeding unit, for coordinating and controlling the automated operation of the entire system.

[0009] More preferably, the above-mentioned raw material supply unit includes a raw material tank and a liquid level holding tank located below and connected to the raw material tank, wherein the outlet of the liquid level holding tank is connected to the inlet of the metering pump.

[0010] Further preferably, the above also includes a pneumatic delivery control unit electrically connected to the central control unit; the pneumatic delivery control unit includes a compressed air storage tank and a self-control valve group located on the top of the metering tank, the self-control valve group including a second self-control valve, a third self-control valve and a fourth self-control valve; the second self-control valve is connected to the liquid level holding tank through a pipeline, the third self-control valve is connected to the compressed air storage tank through a pipeline, and the fourth self-control valve is located at the exhaust port on the top of the metering tank.

[0011] In a further preferred embodiment, the pneumatic conveying control unit further includes a feeding nozzle, which is located at the end of the pipeline from the metering tank to the mixing tank; the outlet diameter of the feeding nozzle is 2-10 mm, and the outlet size is adjustable.

[0012] More preferably, a static mixer is provided on the outlet pipe of the first pumping mechanism and / or the outlet pipe of the second pumping mechanism.

[0013] In a further preferred embodiment, the system also includes a closed cabinet, in which the automatic weighing unit, mixing unit, storage unit and pneumatic conveying control unit are all housed. The cabinet is connected to a temperature and humidity control system to maintain a low temperature and dry environment inside the cabinet.

[0014] More preferably, the above also includes an automatic cleaning system, which is equipped with a cleaning agent pumping pipeline that can sequentially pump the cleaning agent to a mixing device, an intermediate storage tank and a coating device for circulating cleaning.

[0015] Based on the same technical concept, the present invention also provides a method for dispensing a multi-component silicone oil dispensing system, comprising the following steps: S1. Select the preset ingredient formula through the central control unit; S2. The central control unit controls the automatic weighing unit to accurately weigh each component raw material in sequence. S3. After weighing, put each component into the mixing tank in the predetermined order, and start the stirrer and temperature control module of the mixing unit to carry out stirring and temperature control according to the preset program. S4. After mixing, the uniformly mixed silicone oil is pumped to the intermediate storage tank through the first pumping mechanism. S5. The central control unit controls the second pumping mechanism to pump the silicone oil in the intermediate storage tank to the coating unit based on the liquid level signal of the downstream coating unit.

[0016] More preferably, in step S3 above, the step of adding the components to the mixing tank in a predetermined order includes: first, adding the main agent, light stripping agent, and heavy stripping agent to the mixing tank, and simultaneously turning on the stirrer and temperature control module in the mixing tank for stirring and temperature control, with the stirrer speed set at 30-120 rpm; maintaining the stirring temperature at 20-24°C for 3-5 minutes; then adding the crosslinking agent to the mixing tank and continuing to stir for 5-8 minutes; finally, adding the catalyst to the mixing tank and stirring for 8-12 minutes by controlling the valve and / or feeding nozzle on the catalyst pipeline.

[0017] In a further preferred embodiment, the steps of weighing each component raw material in step S2 and adding each component to the mixing tank in step S3 include: during weighing, opening the second and fourth automatic control valves and closing the third automatic control valve, allowing the material in the liquid level holding tank to automatically flow through the metering pump for metering and then into the metering tank for weighing by gravity; when the weighing requirement is met, closing the fourth automatic control valve and opening the second and third automatic control valves, using the compressed air pressure in the compressed air storage tank to push the material back to the liquid level holding tank; when adding material to the mixing tank, closing the second and fourth automatic control valves, opening the third and fifth automatic control valves, and adjusting the outlet size of the feeding nozzle, adjusting the feeding speed by the compressed air pressure.

[0018] Further preferably, the aforementioned central control unit is configured to: acquire in real time the weight data of the automatic weighing unit, the temperature and stirring status of the mixing unit, the pumping parameters of the feeding unit, and the coating width and speed information of the downstream coating device through a data acquisition module; calculate the theoretical coating amount and determine the required material ratio in real time based on the preset formula ratio, the real-time acquired weight data, coating width and speed information; dynamically adjust the metering pump flow rate, agitator speed and pumping frequency of the pumping mechanism according to the material ratio to achieve precise control of the target ratio; trigger an alarm and automatically execute a safety control strategy when a parameter deviation is detected to exceed a preset threshold; and simultaneously record production data and provide an operation intervention interface through a human-machine interface.

[0019] More preferably, the inner wall of the mixing tank is provided with irregularly shaped fins, and the temperature control module is a cooling circulation system installed in the jacket or inside of the mixing tank.

[0020] More preferably, the above-mentioned mixing unit further includes a lifting mechanism for driving the mixing tank to rise and fall. The lifting mechanism is disposed below the mixing tank and is used to lower the mixing tank in cleaning mode while keeping the tank lid fixed.

[0021] More preferably, the cleaning mode of the automatic cleaning system in the above system includes the following steps: C1. Mixing tank cleaning: Pump a measured amount of cleaning agent into the mixing tank and start the agitator to perform agitation and cleaning; C2. Cleaning of intermediate storage tank: Pump the cleaning agent in the mixing tank to the intermediate storage tank and start the agitator in the intermediate storage tank for agitation and cleaning; C3. Flushing of pipelines and coating equipment: Pump the cleaning agent in the intermediate storage tank to the downstream coating equipment to flush the entire delivery pipeline and coating head.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention arranges the raw material supply unit, automatic weighing unit, mixing unit, storage unit and feeding unit in series. The silicone oil main agent, crosslinking agent, light stripping agent, heavy stripping agent and catalyst each have their own raw material tank, liquid level holding tank and metering tank supply route. Each raw material is independently metered, which enables accurate and rapid feeding during mixing and meets the time control requirements required for mixing different raw materials. This enables the multi-component silicone oil batching system of the present invention to accurately feed the materials.

[0023] By utilizing multiple self-regulating valves in the pneumatic conveying control unit, not only can pipeline residues be cleaned, effectively reducing material residue and making weighing more accurate, but also air pressurization actively accelerates the speed at which the main agent enters the mixing tank. Adjusting the catalyst feeding nozzle opening size to a minimum diameter of 2mm allows for precise control of the addition rhythm of catalysts and other materials, avoiding the problem of excessively high local platinum catalyst component concentrations and preventing crystallization. This significantly improves the accuracy of weighing and feeding, with errors controlled below 0.1%, thereby significantly enhancing the stability of the batching. This leads to a reduction in the amount of platinum catalyst and inhibitor required.

[0024] By utilizing a central control unit to electrically connect and control system units such as the material supply unit, automatic weighing unit, mixing unit, storage unit, and feeding unit, the central control unit's data acquisition module acquires real-time weight data from the automatic weighing unit, temperature and stirring status from the mixing unit, pumping parameters from the feeding unit, and coating width and speed information from the downstream coating unit. Based on preset formula ratios, real-time acquired weight data, coating width, and speed information, the theoretical coating amount is calculated in real-time, and the required material ratio is determined. While pumping materials from the intermediate storage tank to the downstream coating unit, the next round of pre-mixing is performed in advance, pumping various components separately into the metering tank, shortening the feeding time and increasing the mixing time; thus improving the overall efficiency and control accuracy of the system. The system can store multiple formulas for convenient and quick switching. Production process data can be recorded, facilitating quality traceability and usage statistics. The mixing process requires no manual operation, operating fully automatically, reducing harm to human health.

[0025] By cooling and dehumidifying the small space inside the sealed mixing cabinet, the temperature control system ensures a low-temperature environment for the silicone oil and prevents the precipitation of condensate, keeping the supply temperature stable at around 16℃, which is far lower than the ambient temperature, effectively ensuring the stability of the silicone oil viscosity and subsequent coating amount. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the multi-component silicone oil mixing system of the present invention; Figure 2 This is a schematic diagram showing the connection relationship between the central control unit and each unit of the multi-component silicone oil dispensing system of the present invention; Figure 3 This is a schematic diagram of the pneumatic conveying control unit of the multi-component silicone oil batching system of the present invention.

[0027] The following are the labels in the diagram: 1. Raw material tank; 2. First automatic control valve; 3. Liquid level holding tank; 4. Metering pump; 5. Second automatic control valve; 6. Third automatic control valve; 7. Fourth automatic control valve; 8. Metering tank; 9. Fifth automatic control valve; 10. Mixing tank; 11. Intermediate storage tank; 12. Compressed air storage tank; 13. Feed nozzle; 14. First pumping mechanism; 15. Second pumping mechanism; 16. Static mixer; 17. Temperature and humidity control system; Q1. Cleaning agent raw material tank; Q2. Cleaning agent liquid level holding tank; Q3. Cleaning agent metering pump. Detailed Implementation

[0028] To facilitate understanding of the present invention, specific embodiments are described in further detail below with reference to the accompanying drawings and examples. The following examples are illustrative of the invention but are not intended to limit its scope.

[0029] In the description of this invention, it should be understood that the terms "upper", "lower", "left", "right", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0030] Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by those skilled in the art. The technical terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the scope of the invention.

[0031] Example like Figure 1 , Figure 2 as well as Figure 3As shown, a multi-component silicone oil batching system includes: 5 raw material supply units, each raw material supply unit including 1 raw material tank 1 and 1 liquid level holding tank 3, the liquid level holding tank 3 being located below the raw material tank 1 and connected to it through a first self-control valve 2, the outlet of the liquid level holding tank 3 being connected to the inlet of a subsequent metering pump 4; the 5 raw material tanks 1 are used to store silicone oil main agent, crosslinking agent, light release agent, heavy release agent and catalyst respectively, wherein the raw material tank 1 storing the silicone oil main agent is an IBC barrel, and the rest are conventional packaging barrels.

[0032] The system includes five automatic weighing units, each connected to a corresponding raw material supply unit. Each unit includes a metering pump 4 and a metering tank 8. The metering pump 4 is connected to the outlet of the liquid level holding tank 3 of the raw material supply unit, and the metering tank 8 is connected to the outlet of the metering pump 4. These units are used to accurately weigh each component of the raw material according to a preset formula. The mixing unit includes a mixing tank 10 located below the metering tank 8, a stirrer inside the mixing tank 10, and a temperature control module for controlling the temperature inside the mixing tank 10. One mixing tank 10 is provided to receive and mix the output from the five metering tanks 8 in the upstream automatic weighing unit. A fifth automatic control valve 9 is installed on the pipeline connecting the mixing tank 10 to each metering tank 8. The inner wall of the mixing tank 10 is provided with irregularly shaped fins, and the temperature control module is a cooling circulation system located in the jacket or inside the mixing tank 10. The mixing unit also includes a lifting mechanism for driving the mixing tank 10 to rise and fall. The lifting mechanism is located below the mixing tank 10 and is used to lower the mixing tank 10 in cleaning mode while keeping the lid of the mixing tank 10 fixed.

[0033] The storage unit includes an intermediate storage tank 11 and a first pumping mechanism 14 for pumping materials from the mixing tank 10 to the intermediate storage tank 11; the intermediate storage tank 11 also includes a temperature control module and a stirrer.

[0034] The feeding unit includes a second pumping mechanism 15 for pumping materials from the intermediate storage tank 11 to the downstream coating device; and a central control unit electrically connected to the automatic weighing unit, mixing unit, storage unit and feeding unit for coordinating and controlling the automated operation of the entire system.

[0035] In this embodiment, as Figure 2 As shown, it also includes a pneumatic delivery control unit electrically connected to the central control unit; the pneumatic delivery control unit includes a compressed air storage tank 12 and five sets of self-control valves respectively located on the top of the five metering tanks 8, each set of self-control valves including a second self-control valve 5, a third self-control valve 6 and a fourth self-control valve 7; the second self-control valve 5 is connected to the liquid level holding tank 3 through a pipeline, the third self-control valve 6 is connected to the compressed air storage tank 12 through a pipeline, and the fourth self-control valve 7 is located at the exhaust port on the top of the metering tank 8.

[0036] In this embodiment, the pneumatic conveying control unit further includes a feeding nozzle 13. There are 5 feeding nozzles 13, and each feeding nozzle 13 is located at the end of the pipeline from the corresponding metering tank 8 to the mixing tank 10. The outlet diameter of the feeding nozzle 13 is 2-10mm, and the outlet size is adjustable.

[0037] In this embodiment, a static mixer 16 is provided on the outlet pipes of the first pumping mechanism 14 and the second pumping mechanism 15. Alternatively, the static mixer 16 may be provided only on the outlet pipe of the first pumping mechanism 14, or only on the outlet pipe of the second pumping mechanism 15. Both the first pumping mechanism 14 and the second pumping mechanism 15 are suction pumps.

[0038] In this embodiment, the system further includes a closed cabinet, in which the raw material supply unit, automatic weighing unit, mixing unit, storage unit and pneumatic conveying control unit are all located. The cabinet is connected to a temperature and humidity control system 17, which is electrically connected to the central control unit to maintain a low temperature and dry environment inside the cabinet.

[0039] In this embodiment, the system further includes an automatic cleaning system. The automatic cleaning system includes a cleaning agent raw material tank Q1, a cleaning agent level maintaining tank Q2 connected to the tank, and a cleaning agent metering pump Q3 connected to the outlet of the cleaning agent level maintaining tank Q2. The cleaning agent metering pump Q3 is connected to the mixing tank 10 via a pipeline. The automatic cleaning system is equipped with a cleaning agent pumping pipeline, which can sequentially pump the cleaning agent to the mixing device, intermediate storage tank 11, and coating device for circulating cleaning.

[0040] In this embodiment, the central control unit is configured to: acquire in real time the weight data of the automatic weighing unit, the temperature and stirring status of the mixing unit, the pumping parameters of the feeding unit, and the coating width and speed information of the downstream coating device through the data acquisition module; calculate the theoretical coating amount and determine the required material ratio in real time based on the preset formula ratio, the real-time acquired weight data, coating width and speed information; dynamically adjust the flow rate of the metering pump 4, the speed of the stirrer and the pumping frequency of the pumping mechanism according to the material ratio to achieve precise control of the target ratio; trigger an alarm and automatically execute a safety control strategy when the parameter deviation is detected to exceed the preset threshold; and simultaneously record production data and provide an operation intervention interface through the human-machine interface.

[0041] The specific steps of the batching method of the multi-component silicone oil batching system of the present invention are as follows: Step 1: In the human-machine interface of the central control unit, select the system formula and click the "Automatic Preparation" button. The program controls the opening of the first automatic control valve 2, allowing the main agent to flow out by gravity through the lower outlet of the ton IBC container, and then through a hose into the liquid level holding tank 3 directly below. A float switch in the liquid level holding tank 3 controls the liquid level, maintaining a stable main agent level. A hose is connected to the lower outlet of the liquid level holding tank 3, which in turn connects to the metering pump 4. The main agent liquid is pumped by the metering pump 4 to the automatic weighing unit. The central control unit program controls the operation of the metering pump 4, adjusting its operation according to the calculated target weight to pump the material to the metering tank 8 for weighing. During weighing, the second automatic control valve 5 and the fourth automatic control valve 7 are opened, and the third automatic control valve 6 is closed, allowing the material in the liquid level holding tank 3 to automatically flow through the metering pump 4 for metering and then into the metering tank 8 for weighing, achieving accurate metering. Step 2: The program controls the opening of the first automatic control valve 2. The crosslinking agent flows out by gravity through the lower outlet of the 50-100 kg packaging drum, enters the liquid level holding tank 3 directly below via a hose, and is controlled by a float switch in the liquid level holding tank 3 to maintain a stable liquid level of the crosslinking agent. The lower outlet of the liquid level holding tank 3 is connected to a hose, which is then connected to the metering pump 4. The crosslinking agent liquid is pumped to the automatic weighing unit of the crosslinking agent by the metering pump 4. The central control unit program controls the operation of the metering pump 4. According to the calculated target weight, the operation of the metering pump 4 is adjusted to pump the material to the metering tank 8 for weighing. During weighing, the second automatic control valve 5 and the fourth automatic control valve 7 are opened, and the third automatic control valve 6 is closed, so that the material in the liquid level holding tank 3 automatically flows through the metering pump 4 for metering and then into the metering tank 8 for weighing, thus achieving the purpose of accurate measurement. Step 3: The program controls the opening of the first automatic control valve 2. The heavy stripping agent flows out by gravity through the lower outlet of the 20-50 kg packaging drum, enters the liquid level holding tank 3 directly below via a hose, and is controlled by a float switch in the liquid level holding tank 3 to maintain a stable liquid level of the heavy stripping agent. The lower outlet of the liquid level holding tank 3 is connected to a hose, which is then connected to the metering pump 4. The heavy stripping agent liquid is pumped by the metering pump 4 to the heavy stripping agent automatic weighing unit. The central control unit program controls the operation of the metering pump 4. According to the calculated target weight, the operation of the metering pump 4 is adjusted to pump the material to the metering tank 8 for weighing. During weighing, the second automatic control valve 5 and the fourth automatic control valve 7 are opened, and the third automatic control valve 6 is closed, so that the material in the liquid level holding tank 3 automatically flows through the metering pump 4 for metering and then into the metering tank 8 for weighing, thus achieving accurate measurement. (If a heavy stripping agent is added to a single formula, a light stripping agent is not required.) Step 4: The program controls the opening of the first automatic control valve 2. The light stripping agent flows out by gravity through the lower outlet of the 20-50 kg packaging drum, enters the liquid level holding tank 3 directly below via a hose, and is controlled by a float switch in the liquid level holding tank 3 to maintain a stable liquid level of the light stripping agent. The lower outlet of the liquid level holding tank 3 is connected to a hose, which is then connected to the metering pump 4. The light stripping agent liquid is pumped by the metering pump 4 to the automatic weighing unit of the light stripping agent. The central control unit program controls the operation of the metering pump 4. According to the calculated target weight, the operation of the metering pump 4 is adjusted to pump the material to the metering tank 8 for weighing. During weighing, the second automatic control valve 5 and the fourth automatic control valve 7 are opened, and the third automatic control valve 6 is closed, so that the material in the liquid level holding tank 3 automatically flows through the metering pump 4 for metering and then into the metering tank 8 for weighing, thus achieving the purpose of accurate measurement. (If a light stripping agent is added to a single formula, a heavy stripping agent is not required.) Step 5: The program controls the opening of the first automatic control valve 2. The catalyst flows out by gravity through the lower outlet of the 20-50 kg packaging drum, and enters the liquid level holding tank 3 directly below via a hose. A float switch in the liquid level holding tank 3 controls the liquid level, maintaining a stable catalyst level. A hose connects to the lower outlet of the liquid level holding tank 3, which in turn connects to the metering pump 4. The catalyst liquid is pumped by the metering pump 4 to the light catalyst automatic weighing unit. The central control unit program controls the operation of the metering pump 4, adjusting its operation according to the calculated target weight to pump the material to the metering tank 8 for weighing. During weighing, the second automatic control valve 5 and the fourth automatic control valve 7 are opened, and the third automatic control valve 6 is closed. This allows the material in the liquid level holding tank 3 to automatically flow through the metering pump 4 for metering and then into the metering tank 8 for weighing, achieving accurate measurement. Step 6: After the above-mentioned formulation components reach the target weight, close the fourth automatic control valve 7, and open the second and third automatic control valves 5 and 6. Use the compressed air pressure in the compressed air storage tank 12 to push the various materials back into the liquid level holding tank 3. Then close the second and fourth automatic control valves 5 and 7, open the third and fifth automatic control valves 6 and 9, and adjust the outlet size of the feeding nozzle 13. Adjust the feeding speed using compressed air pressure to allow the main agent, light stripping agent, and / or heavy stripping agent to flow into the mixing tank 10 below. Simultaneously, turn on the agitator in the mixing tank 10, setting the speed to 30-120 rpm; turn on the cooling circulation system of the mixing tank 10 to maintain the stirring temperature at 20-24℃, and stir for 3-5 minutes. Step 7: After the timing is completed, close the second automatic control valve 5 and the fourth automatic control valve 7, open the third automatic control valve 6 and the fifth automatic control valve 9, and adjust the outlet size of the feeding nozzle 13. Adjust the feeding speed by using compressed air pressure so that the crosslinking agent flows into the mixing tank 10 below. Keep the stirring paddle in working condition and start stirring again for 5-8 minutes. Step 8: After the timing is completed, close the second automatic control valve 5 and the fourth automatic control valve 7, open the third automatic control valve 6 and the fifth automatic control valve 9, and adjust the outlet size of the feeding nozzle 13. Adjust the feeding speed by using compressed air pressure to allow the catalyst to flow into the mixing tank 10 below. The nozzle at the end of the pipeline is designed with a diameter of 2-4 mm. Add the catalyst slowly and keep the stirring paddle working. Re-time and stir for 8-12 minutes. Step 9: Stop the agitator, stop the cooling circulation system, and end the agitation process; Step 10: The central control unit program starts the suction pump of the first pumping mechanism 14 and starts the liquid level controller A in the intermediate storage tank 11. The mixed silicone oil is pumped to the intermediate storage tank 11 under the control of liquid level and time. The stirring paddle of the intermediate storage tank 11 is in a rotating state for a long time, with the speed set to 10-30 revolutions per minute. Pumping takes 2 to 3 minutes, and the mixing tank 10 is emptied. Step 11: The program automatically loops through steps 1-10; Step 12: The program automatically monitors the liquid level B of the coating device and controls the suction pump of the second pumping mechanism 15 to pump the silicone oil in the intermediate storage tank 11 to the coating device to maintain the silicone oil level in the coating device.

[0042] Automatic cleaning mode: When it is necessary to replace the product or perform regular maintenance, start the "automatic cleaning" program. The steps are as follows: Preparation check: The system checks and confirms that the batching process has stopped and that the mixing tank 10, intermediate storage tank 11 and related pipelines are in a cleanable state. If the liquid level controller confirms that there is a shortage of liquid.

[0043] Cleaning of mixing tank 10: Start the cleaning agent metering pump Q3 and pump a measured amount of cleaning agent, such as 25-30 kg, into mixing tank 10. Start the agitator of mixing tank 10 and run it at a high speed, such as 100-150 rpm, for 3-5 minutes for intensive cleaning.

[0044] Cleaning agent transfer and intermediate tank cleaning: Start the suction pump of the first pumping mechanism 14 to pump the cleaning agent in the mixing tank 10 into the intermediate storage tank 11. Then start the agitator of the intermediate storage tank 11 and run it at a high speed for 3-5 minutes for cleaning.

[0045] System flushing: Start the suction pump of the second pumping mechanism 15 to pump the cleaning agent in the intermediate storage tank 11 to the coating device to flush the entire delivery pipeline and coating head.

[0046] Cleaning agent recovery: The cleaning liquid flowing out from the coating device is collected manually and can be filtered and reused.

[0047]

[0048] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A multi-component silicone oil mixing system, characterized in that, include: Multiple raw material supply units are used to store silicone oil main agent, crosslinking agent, light stripping agent, heavy stripping agent and catalyst respectively; automatic weighing unit, which includes a metering pump connected to each raw material supply unit and a metering tank connected to the metering pump outlet, is used to accurately weigh each component raw material according to a preset formula; The mixing unit includes a mixing tank located below the metering tank, a stirrer disposed inside the mixing tank, and a temperature control module for controlling the temperature inside the mixing tank. The storage unit includes an intermediate storage tank and a first pumping mechanism for pumping materials from the mixing tank to the intermediate storage tank; the feeding unit includes a second pumping mechanism for pumping materials from the intermediate storage tank to the downstream coating unit; and a central control unit electrically connected to the automatic weighing unit, mixing unit, storage unit and feeding unit for coordinating and controlling the automated operation of the entire system.

2. The multi-component silicone oil mixing system according to claim 1, characterized in that, The raw material supply unit includes a raw material tank and a liquid level holding tank located below and connected to the raw material tank. The outlet of the liquid level holding tank is connected to the inlet of the metering pump.

3. The multi-component silicone oil mixing system according to claim 2, characterized in that, It also includes a pneumatic delivery control unit electrically connected to the central control unit; the pneumatic delivery control unit includes a compressed air storage tank and a self-control valve group located on the top of the metering tank, the self-control valve group includes a second self-control valve, a third self-control valve and a fourth self-control valve; the second self-control valve is connected to the liquid level holding tank through a pipeline, the third self-control valve is connected to the compressed air storage tank through a pipeline, and the fourth self-control valve is located at the exhaust port on the top of the metering tank.

4. The multi-component silicone oil mixing system according to claim 3, characterized in that, The pneumatic conveying control unit also includes a feeding nozzle, which is located at the end of the pipeline from the metering tank to the mixing tank; the outlet diameter of the feeding nozzle is 2-10mm, and the outlet size is adjustable.

5. The multi-component silicone oil mixing system according to claim 4, characterized in that, A static mixer is provided on the outlet pipeline of the first pumping mechanism and / or the outlet pipeline of the second pumping mechanism.

6. The multi-component silicone oil dispensing system according to claim 5, characterized in that, The system also includes a closed cabinet, in which the automatic weighing unit, mixing unit, storage unit and pneumatic conveying control unit are all located. The cabinet is connected to a temperature and humidity control system to maintain a low temperature and dry environment inside the cabinet.

7. The multi-component silicone oil dispensing system according to claim 6, characterized in that, It also includes an automatic cleaning system, which is equipped with a cleaning agent pumping pipeline that can sequentially pump the cleaning agent to a mixing device, an intermediate storage tank and a coating device for circulating cleaning.

8. A method for dispensing a multi-component silicone oil using a dispensing system as described in any one of claims 3-7, characterized in that, Includes the following steps: S1. Select the preset ingredient formula through the central control unit; S2. The central control unit controls the automatic weighing unit to accurately weigh each component raw material in sequence. S3. After weighing, put each component into the mixing tank in the predetermined order, and start the stirrer and temperature control module of the mixing unit to carry out stirring and temperature control according to the preset program. S4. After mixing, the uniformly mixed silicone oil is pumped to the intermediate storage tank through the first pumping mechanism. S5. The central control unit controls the second pumping mechanism to pump the silicone oil in the intermediate storage tank to the coating unit based on the liquid level signal of the downstream coating unit.

9. The ingredient preparation method according to claim 8, characterized in that, In step S3, the step of adding the components to the mixing tank in a predetermined order includes: first, adding the main agent, light stripping agent, and heavy stripping agent to the mixing tank, and simultaneously turning on the stirrer and temperature control module in the mixing tank for stirring and temperature control, with the stirrer speed set at 30-120 rpm; maintaining the stirring temperature at 20-24°C for 3-5 minutes; then adding the crosslinking agent to the mixing tank and continuing to stir for 5-8 minutes; finally, adding the catalyst to the mixing tank and stirring for 8-12 minutes by controlling the valve and / or feeding nozzle on the catalyst pipeline.

10. The ingredient preparation method according to claim 9, characterized in that, The steps of weighing each component raw material in step S2 and adding each component to the mixing tank in step S3 include: during weighing, opening the second and fourth automatic control valves and closing the third automatic control valve, allowing the material in the liquid level holding tank to automatically flow through the metering pump for metering and then into the metering tank for weighing by gravity; when the weighing requirement is met, closing the fourth automatic control valve and opening the second and third automatic control valves, using the compressed air pressure in the compressed air storage tank to push the material back to the liquid level holding tank; when adding material to the mixing tank, closing the second and fourth automatic control valves, opening the third and fifth automatic control valves, and adjusting the outlet size of the feeding nozzle, adjusting the feeding speed by the compressed air pressure.

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