RTM (Resin Transfer Molding) glue injection device and method capable of simultaneously injecting multiple molds

Abstract

The invention discloses a multi-mold simultaneous injection RTM (Resin Transfer Molding) glue injection device and method, and aims to solve the problems of low productivity and poor metering precision of an existing RTM glue injection machine. The multi-mold simultaneous injection RTM glue injection device comprises a feeding unit, a multi-mold shunting unit, a cleaning unit, a full-process monitoring unit and a cross validation module, wherein the feeding unit comprises a stirring tank with a weighing sensor, a feeding barrel and a vacuum defoaming assembly; the multimode shunting unit is provided with N branch glue injection loops, and branch pressure is independently adjusted through a gear metering pump; the cleaning unit comprises a liquid pump and a spraying head; the whole-process monitoring unit covers the whole stage of glue injection and comprises weighing calibration before glue injection, flow monitoring during glue injection and weighing of a residual glue collecting tank after glue injection; the cross validation module adopts an upper computer to be matched with an adaptive weighting algorithm, and linkage adjustment and alarm are performed when the deviation exceeds 3%. Multi-mode synchronous glue injection is achieved, the glue injection amount error is smaller than or equal to + / -2%, and whole-process data tracing is supported.

Description

Technical Field

[0001] This invention relates to the field of composite material molding equipment and process technology. Specifically, it relates to a multi-mold simultaneous injection RTM (Recombinant Material Molding) device and method. Background Technology

[0002] As one of the core technologies for composite material molding, RTM (Reinforced Molding) involves injecting liquid resin into a closed mold containing pre-laid reinforcing materials. After impregnation and curing, an integrated component is formed. It has advantages such as high molding efficiency, high component dimensional accuracy, and stable mechanical properties, and has been widely used in military, aerospace, and high-end equipment industries.

[0003] However, existing RTM dispensing equipment and processes suffer from two major technical bottlenecks:

[0004] Limited production capacity makes it difficult to adapt to large-scale production: Most existing dispensing machines adopt a "single mold, single dispensing" design, meaning that a single machine can only supply adhesive to one mold, and production efficiency is strictly limited by the mold curing cycle (usually 30-120 minutes). Even if some machines support multiple stations, they can only achieve "alternating dispensing" rather than "synchronous dispensing," resulting in limited capacity increases per unit time, which cannot meet the mass production needs of components in the military and aerospace industries.

[0005] Low metering accuracy and poor component quality consistency: Existing glue injection volume monitoring mostly relies on a single sensor (such as a pipeline flow meter or mold electronic scale), which is easily affected by factors such as resin viscosity fluctuations (temperature changes can cause viscosity deviations of 20%-50%), equipment wear (such as aging of valve seals and pump leakage), and impurities clogging pipelines. The metering error generally exceeds ±5%. In addition, the monitoring only covers the single stage of "in-glue injection" and lacks a complete closed-loop process of "pre-glue injection calibration - in-glue injection adjustment - post-glue injection verification". This easily leads to defects such as local glue shortage, excessive glue volume, or residual air bubbles, resulting in an increased component scrap rate and making it difficult to meet the quality consistency requirements of high-end fields.

[0006] To address the aforementioned issues, the industry urgently needs an RTM dispensing solution that combines multi-mold synchronous dispensing with precise monitoring of the entire process, in order to overcome the dual limitations of production capacity and accuracy. Summary of the Invention

[0007] The core objective of this invention is to solve the problems of low production capacity and poor metering accuracy of existing RTM dispensing machines, and to provide an RTM dispensing device and method for multi-mold simultaneous dispensing to achieve the following objectives:

[0008] It enables simultaneous and independent glue injection from multiple molds, significantly improving production efficiency per unit time and adapting to the needs of large-scale production; it constructs a full-process multi-sensor cross-verification system to eliminate the measurement deviation of a single sensor, controlling the glue injection error to ≤±2% and ensuring the consistency of component quality; it has automated cleaning, data traceability and security encryption functions, reducing the cost of manual intervention and meeting the requirements of military and aerospace industries for traceability of the production process and data security.

[0009] To achieve the above objectives, the present invention provides a multi-mold simultaneous injection RTM dispensing device, the specific technical solution of which is as follows:

[0010] The multi-mold simultaneous injection RTM dispensing device consists of five parts: a material supply unit, a multi-mold diversion unit, a cleaning unit, a full-process monitoring unit, and a cross-validation module. These units work together to achieve the entire process of "resin pretreatment - multi-mold simultaneous injection - precise monitoring - automatic cleaning - data traceability." The specific structure and functions are as follows:

[0011] feeding unit

[0012] Components: feeding hopper, pneumatic ball valve, mixing tank with weighing sensor, vacuum degassing assembly (including vacuum pump), water temperature controller, filter; wherein, the mixing tank integrates tank body, paddle mixing system, safety valve, pressure sensor (range 0-1MPa, accuracy ±0.5% FS), capacitive level gauge and bottom weighing sensor.

[0013] Connection relationship: It is connected to the multi-mode diversion unit (2) through quick-connect coupling, hose and filter to ensure that the resin delivery process is free from pollution and impurities.

[0014] Core functions: to realize automatic resin feeding, heating, stirring and vacuum degassing; specifically, the vacuum pump (vacuum degree ≤ -0.09MPa) controls the quantitative delivery of resin from the feeding tank to the mixing tank through the on and off of the pneumatic ball valve; the water temperature controller (temperature control range 25-40℃, accuracy ±0.5℃) and the stirring system (speed 50-300r / min) work together to adjust the resin viscosity to the optimal dispensing range; the vacuum degassing component can eliminate air bubbles in the resin and avoid the formation of pore defects in the components after dispensing.

[0015] Multimode shunt unit

[0016] Components: Diverter block, N independent gear metering pumps (N≥2, expandable according to production capacity requirements), drive motor, branch flow meter (accuracy ±0.5% FS), branch pressure sensor (range 0-1MPa, accuracy ±0.5% FS), pneumatic three-way ball valve.

[0017] Connection relationship: The ball valve and PU tube are connected to the mold to be injected one by one, and each gear metering pump independently drives a branch injection circuit.

[0018] Core functions: Enables synchronous flow distribution and independent control of resin across multiple molds; the gear metering pump has a pressure adjustment range of 0.1-0.3MPa and a response time of ≤0.1s, and can dynamically adjust the injection pressure and rate according to the volume of different molds and the number of reinforcing material layers; the pneumatic three-way ball valve has the ability to switch between two positions, "injection circuit" and "circulation circuit", to meet the needs of different working conditions such as injection, pressure holding, and cleaning.

[0019] Cleaning unit

[0020] Components: alcohol tank, liquid pump (output pressure 0.2-0.4MPa), solenoid valve, annular spray head (welded to the upper part of the inside of the mixing tank, with 6-8 spray holes, hole diameter 0.5-1mm).

[0021] Connection: The outlet of the liquid pump is connected to the spray head through a pipeline.

[0022] Core function: To achieve automated cleaning of the inner wall of the mixing tank and the entire pipeline; during cleaning, alcohol is sprayed through the nozzle to cover the inner wall of the mixing tank 360°, and at the same time, the pneumatic three-way ball valve switches to the "circulation loop". The alcohol flows through the feed pipeline, filter, diverter block and branch glue injection loop and is discharged to the waste liquid tank to avoid residual resin from curing and contaminating the next glue injection.

[0023] Full-process monitoring unit

[0024] Components: Weighing sensors (weighing sensors at the bottom of the mixing tank and at the bottom of the residual adhesive collection tank), pressure sensors (pressure sensors in the mixing tank and pressure sensors in the branch injection tank), temperature sensors (monitoring the resin temperature and pipeline temperature in the mixing tank, with an accuracy of ±0.5℃), and branch flow meters.

[0025] Monitoring scope: Covering the entire glue injection stage;

[0026] Before dispensing: calibrate the initial glue volume using the weighing sensor of the mixing tank to ensure that the total glue volume meets the requirements of multi-mold dispensing;

[0027] During glue injection: Data is collected every 0.5 seconds using a branch flow meter, pressure sensor, and temperature sensor to monitor the glue injection status of each branch in real time;

[0028] After glue injection: The actual amount of glue injected is calculated by comparing the weighing sensor in the residual glue collection tank with the amount of glue remaining in the mixing tank, forming a closed-loop verification.

[0029] Core function: Provides full-process data support for the cross-validation module, enabling multi-dimensional real-time monitoring of "injection volume - pressure - temperature".

[0030] Cross-validation module

[0031] Components: electrical control cabinet, host computer (integrated adaptive weighted algorithm), industrial printer, touch screen display.

[0032] Core Function: Data Fusion Calculation: Multi-sensor data is fused through an adaptive weighting algorithm. Before glue injection, the weighing sensor of the mixing tank is assigned 100% weight. During glue injection, the flow meter is assigned 50%, the capacitive level gauge 30%, and the gear metering pump 20% weight (the weight is automatically adjusted when the fluctuation of a single sensor exceeds 5%). After glue injection, the combined calculation result of "remaining glue amount in the mixing tank + residual glue amount" is assigned 100% weight.

[0033] Deviation control and alarm: When the real-time dispensing volume deviates from the target dispensing volume by more than 3%, the multi-mold diversion unit is linked to adjust the speed of the corresponding gear metering pump, and an audible and visual alarm is triggered at the same time.

[0034] Data Management: Automatically stores full-process data (including sensor data, parameter adjustment records, and glue injection volume calculation results), supports encryption (such as AES-256 algorithm), cloud synchronization (storage period ≥ 1 year), and three-level access control (administrator-operator-visitor, dual verification of account password + USB key).

[0035] To achieve the above objectives, this invention provides a multi-mold simultaneous injection RTM glue dispensing method, the specific technical solution of which is as follows:

[0036] The multi-mold simultaneous injection RTM method includes five core steps: S1 material loading stage, S2 resin pretreatment stage, S3 multi-mold simultaneous injection stage, S4 post-injection calculation stage, and S5 cleaning stage. The specific process is as follows:

[0037] S1 feeding stage

[0038] The vacuum pump of the feeding unit is started, and the resin is quantitatively delivered from the feeding hopper to the mixing tank with a weighing sensor through the on / off control of the pneumatic ball valve. The weighing sensor of the mixing tank in the whole process monitoring unit monitors the amount of resin in real time until the initial amount of resin is reached, which is "the total target amount of resin to be injected into all molds + 5%-8% of the reserved residual amount". When the deviation of the initial amount of resin is ≤1%, the feeding is stopped.

[0039] S2 resin pretreatment stage

[0040] Turn on the water temperature controller to heat the resin in the mixing tank to 25-40℃, and control the temperature in real time using a temperature sensor (accuracy ±0.5℃); start the stirring system and adjust the speed to 50-300 r / min (dynamically adjust according to the resin viscosity to ensure no sedimentation); start the vacuum degassing component and maintain a vacuum degree ≤-0.05MPa for 10-15 minutes to eliminate air bubbles in the resin; after pretreatment, confirm that the pressure inside the tank is stable (no abnormal pressure rise / fall) using the mixing tank pressure sensor.

[0041] S3 Multi-mold Synchronous Injection Stage

[0042] Confirm that all pneumatic three-way ball valves in the multi-mold distribution unit are switched to the "glue injection circuit", and that each branch pipeline is sealed to the mold; start the drive motor to drive the gear metering pumps of each branch (initial pressure 0.1-0.3MPa), and the resin enters the distribution block after being filtered by the filter, and is then distributed to each branch glue injection circuit to inject into the corresponding mold; the flow meter, pressure sensor, and temperature sensor of the full-process monitoring unit collect data every 0.5s and transmit it to the cross-validation module.

[0043] The cross-validation module calculates the real-time glue injection volume for each branch using an adaptive weighting algorithm.

[0044] If the real-time injection volume deviates from the target injection volume of the corresponding mold by ≤3%, maintain the current injection parameters;

[0045] If the deviation is greater than 3%, the speed of the gear metering pump in that branch will be automatically adjusted (response time ≤ 0.1s) to correct the glue injection flow rate.

[0046] Anomaly handling (graded by severity):

[0047] Minor anomalies (single branch flow deviation 3%-5%, temperature fluctuation within ±1℃): Automatic parameter adjustment, no need to stop the machine;

[0048] Moderate abnormality (sudden pressure rise in a single branch > 0.05MPa, flow deviation 5%-10%): Suspend glue injection in that branch, keep other branches running, trigger an alarm and wait for manual investigation (pipeline blockage / mold glue leakage).

[0049] Severe abnormality (multiple branch deviations exceeding 10%, sudden pressure drop in mixing tank > 0.08MPa): Immediately stop all branch glue injection, shut down the vacuum degassing component and motor, conduct a comprehensive inspection of the equipment (pipeline rupture / metering pump failure), and restart after troubleshooting.

[0050] S4 Post-Injection Calculation Stage

[0051] When the real-time glue injection volume of a certain branch reaches the target glue injection volume, the gear metering pump of that branch is turned off, the pneumatic three-way ball valve is switched to "circulation loop", the remaining glue volume in the mixing tank and the residual glue volume in the residual glue collection tank are read, and the actual glue injection volume is calculated; the cross-validation module confirms that the deviation is ≤±2%: if the deviation is qualified, the cleaning stage is entered; if the deviation exceeds the tolerance, the corresponding mold component is marked as "to be re-inspected", and the cause of the deviation is analyzed (such as mold glue leakage, sensor abnormality).

[0052] S5 Cleaning Stage

[0053] Start the cleaning unit, open the solenoid valve, and the liquid pump draws alcohol from the alcohol tank (output pressure 0.2-0.4MPa), spraying it onto the inner wall of the mixing tank through the annular spray nozzle; the pneumatic three-way ball valve of the multi-mode diversion unit switches to the "circulation loop," and the alcohol flows through the feed pipeline, filter, diversion block, and branch dispensing loop before being discharged to the waste tank, circulating and spraying for 10-15 minutes; close the liquid pump and solenoid valve, and purge the pipeline with 0.1-0.2MPa compressed air for 1-2 minutes to remove residual alcohol; after cleaning, the cross-validation module automatically stores the entire dispensing process data, encrypts it, and synchronizes it to the cloud, and can print data reports via a printer; at the same time, the equipment performs self-checks (such as zeroing the mixing tank weighing sensor and testing the pipeline sealing) to ensure normal operation in the next operation.

[0054] Compared with the prior art, the present invention has the following significant advantages:

[0055] Significantly increased production capacity: Multi-mold synchronous dispensing is achieved through N independent branch dispensing circuits, increasing the unit time capacity by (N-1) times compared to single-mold equipment (e.g., when N=3, the capacity increases by 2 times), adapting to the large-scale production needs of the military and aerospace industries.

[0056] Significantly optimized glue injection accuracy: The full-process multi-sensor cross-validation + adaptive weighted algorithm controls the glue injection error to ≤±2%, which is 60% more accurate than the traditional single sensor solution (error ±5%), and greatly reduces the component scrap rate;

[0057] High automation and security: It integrates automatic feeding, automatic cleaning, and abnormal classification and handling functions, reducing manual intervention costs by more than 40%; data encryption and access control meet the stringent requirements of military and aerospace industries for production process traceability and data security.

[0058] High adaptability: The pressure and holding parameters of the gear metering pump can be set according to the mold volume and the type of reinforcing material to meet the molding requirements of composite material components of different specifications. Attached Figure Description

[0059] Figure 1 This is a schematic diagram of the overall structure of a multi-mold simultaneous injection RTM dispensing device;

[0060] Figure 2 This is a flowchart illustrating the principle of the present invention;

[0061] Figure 3 This is an overall appearance view of the present invention.

[0062] Figure reference numerals: 1-Feeding unit (11-Feeding hopper, 12-Pneumatic ball valve, 13-Mixing tank, 14-Vacuum degassing component, 15-Water temperature controller, 16-Filter); 2-Multi-mode diversion unit (21-Diversion block, 22-Gear metering pump, 23-Drive motor, 24-Branch flow meter, 25-Pneumatic three-way ball valve); 3-Cleaning unit (31-Alcohol tank, 32-Liquid pump); 4-Full-process monitoring unit (41-Mixing tank weighing sensor, 42-Residual adhesive collection tank weighing sensor, 43-Pressure sensor, 44-Residual adhesive collection tank); 5-Cross-validation module. Detailed Implementation

[0063] To illustrate the technical feasibility of this invention, the implementation process is described in detail below using the specific scenario of "simultaneous injection of glue into two molds (mold A with a volume of 3L and a target injection amount of 3000g; mold B with a volume of 5L and a target injection amount of 5000g)":

[0064] 1. Equipment parameter settings

[0065] Feeding unit: vacuum pump vacuum degree -0.05MPa, water temperature controller target temperature 30℃, stirring system speed 300r / min;

[0066] Multi-mode flow splitting unit: gear metering pump initial pressure 0.1MPa, branch flow metering range 0-5L / min, pneumatic three-way ball valve initial station "circulation loop";

[0067] Full-process monitoring unit: data acquisition frequency 0.5s, residual adhesive collection tank reserved volume 1000g;

[0068] Cross-validation module: Target glue volume is 3000g + 5000g = 8000g, initial glue volume is 8000 + 8% × 8000 = 8640g, deviation threshold is 3%.

[0069] 2. Implementation Steps

[0070] (1) Feeding stage

[0071] Start the vacuum pump and control the resin to enter the mixing tank through the pneumatic ball valve. The weighing sensor of the mixing tank monitors the resin in real time. When the amount of resin reaches 8640g (deviation 0.8%≤1%), stop feeding.

[0072] (2) Resin pretreatment stage

[0073] The water temperature controller heats the water to 30℃ (temperature fluctuation ±0.5℃); the stirring system stirs at 300r / min to avoid resin sedimentation; vacuum degassing for 12min, the vacuum degree inside the tank stabilizes at -0.05MPa, and there are no residual bubbles.

[0074] (3) Multi-mold synchronous glue injection stage

[0075] The drive motor was started, and the gear metering pump supplied glue at a pressure of 0.1 MPa. After being filtered, the resin entered the distributor block. The three-way ball valve was activated to switch to the "glue injection circuit" and injected into molds A and B respectively. After 5 minutes of glue injection, the branch flow meter showed a real-time flow rate of 10 mL / s for mold A and 8.33 mL / s for mold B. The cross-validation module calculated the deviation to be ≤3%, and the parameters were maintained. After 10 minutes of glue injection, the branch pressure of mold B suddenly increased by 0.06 MPa (moderate abnormality). The system paused glue injection in mold B and triggered an audible and visual alarm. Manual inspection revealed a slight blockage in the inlet pipe of mold B. After cleaning, glue injection was restarted. After 3 minutes, the glue injection volume of mold B reached 5000g.

[0076] (4) Post-glue injection accounting stage

[0077] After the glue injection of molds A and B is completed, switch to the "circulation loop". Read the remaining glue amount in the mixing tank as 600g, the remaining glue amount in the residual glue collection tank as 40g, and the actual glue injection amount as 8640-600-40=8000g. The deviation is 0%, which is qualified.

[0078] (5) Cleaning stage

[0079] The cleaning unit is started, and the liquid pump delivers alcohol at a pressure of 0.3 MPa. The spray head covers the inner wall of the mixing tank, and the alcohol flows through the pipeline and is discharged. The spraying is repeated for 12 minutes. Compressed air at 0.15 MPa is introduced to purge the pipeline for 1.5 minutes to remove residual alcohol. The cross-validation module stores the entire process data (including sensor curves and anomaly handling records), encrypts it, and synchronizes it to the cloud to print data reports.

[0080] 3. Implementation Results

[0081] Production capacity: The total time for simultaneous glue injection of two molds is 25 minutes, which is 100% more efficient than single mold glue injection (which takes 50 minutes); Accuracy: The actual glue injection volume deviation is 0% ≤ ±2%, and the components are free of glue defects and air bubbles; Data traceability: The entire process data is encrypted and stored, and can be retrieved by administrators, meeting the quality control requirements of aerospace and other fields.

[0082] In summary, this invention, through its innovative design of "multi-mode splitting + full-process multi-sensor verification," effectively solves the problems of low capacity and poor accuracy in existing RTM dispensing equipment, demonstrating significant technological innovation and engineering practicality.

Claims

1. A multi-mold simultaneous injection RTM dispensing device, characterized in that, A multi-mold simultaneous injection RTM dispensing device includes a material supply unit (1), a multi-mold diversion unit (2), a cleaning unit (3), a full-process monitoring unit (4), and a cross-validation module (5). The feeding unit (1) consists of a feeding hopper, a pneumatic ball valve, a mixing tank with a weighing sensor, a vacuum degassing assembly, a water temperature controller, and a filter. The mixing tank consists of a tank body, a mixing system, a safety valve, a pressure sensor, a capacitive level gauge, and a weighing sensor. The feeding unit (1) is connected to the multi-mode diversion unit (2) via a quick-connect fitting, a hose, and a filter. The feeding unit (1) is mainly used for resin feeding, heating, stirring, and vacuum degassing of the resin. The multi-mode flow divider unit (2) consists of a flow divider block, a metering pump, a motor, a flow meter, a pressure sensor, and a pneumatic three-way ball valve; the multi-mode flow divider unit (2) is connected to the mold through the ball valve and the PU tube; the multi-mode flow divider unit (2) is mainly used to realize the flow divider and circulation of resin; The cleaning unit (3) consists of an alcohol tank, a liquid pump, a solenoid valve and a spray head; the spray head in the cleaning unit (3) is welded inside the mixing tank with a weighing sensor; the cleaning unit (3) is mainly used to clean the inner wall of the mixing tank and the diversion pipeline. The full-process monitoring unit (4) consists of a weighing sensor, a pressure sensor, a temperature sensor, a flow meter, and a residual glue collection tank with a weighing sensor. The weighing sensor includes a weighing sensor at the bottom of the mixing tank (used for glue quantity calibration before glue injection) and a weighing sensor at the bottom of the residual glue collection tank (used for weighing residual glue after glue injection). The flow meter is used to monitor the branch glue injection flow rate in real time during glue injection. The full-process monitoring unit (4) mainly monitors the pressure, temperature, and weight changes throughout the glue injection process. The cross-validation module (5) consists of an electrical control cabinet, a host computer, a printer, and a display screen. The cross-validation module (5) compares the real-time glue injection volume during the glue injection process using an adaptive weighted algorithm. When the glue injection volume deviation exceeds 3%, the multi-mode diversion unit (2) is linked to adjust the gear metering pump and trigger an alarm.

2. The multi-mold simultaneous injection RTM dispensing device according to claim 1, characterized in that, The vacuum pump of the feeding unit (1) has a vacuum adjustment range of ≤-0.09MPa. The feeding is controlled by the on / off control of the pneumatic ball valve to realize the automatic feeding of resin.

3. The multi-mold simultaneous injection RTM dispensing device according to claim 1, characterized in that, The gear metering pump pressure adjustment range of the multi-mode flow splitting unit (2) is 0.1-0.3MPa, the response time is ≤0.1s, and the flow meter accuracy of each branch dispensing circuit is ±0.5%FS, ensuring independent and accurate control of the dispensing volume of each branch.

4. The multi-mold simultaneous injection RTM dispensing device according to claim 1, characterized in that, In the full-process monitoring unit (4), the accuracy of the weighing sensor at the bottom of the residual adhesive collection tank is ±1g, the accuracy of the temperature sensor is ±0.5℃, and the pressure sensor has a range of 0-1MPa and an accuracy of ±0.5%FS.

5. The multi-mold simultaneous injection RTM dispensing device according to claim 1, characterized in that, The liquid pump output pressure of the cleaning unit (3) is 0.2-0.4MPa, and the spray head is provided with 6-8 spray holes with a diameter of 0.5-1mm.

6. The multi-mold simultaneous injection RTM dispensing device according to claim 1, characterized in that, The water temperature control range of the feeding unit (1) is 25-40℃, and the speed adjustment range of the stirring system is 50-300r / min. Through the coordinated control of temperature and speed, the resin viscosity is maintained in the optimal dispensing range.

7. A multi-mold simultaneous injection RTM dispensing method, using the multi-mold simultaneous injection RTM dispensing apparatus according to any one of claims 1-6, characterized in that, Including the following steps: S1 feeding stage: Start the vacuum pump of the feeding unit (1), and control the resin from the feeding bucket of the feeding unit (1) into the mixing tank with the weighing sensor through the on and off of the pneumatic ball valve until the amount of resin in the mixing tank reaches the target initial amount. The weighing sensor of the mixing tank of the whole process monitoring unit (4) confirms that the initial amount deviation is ≤1% and stops feeding. S2 resin pretreatment stage: Start the water temperature machine of the feeding unit (1) to heat the resin in the mixing tank to 25-40℃, start the stirring system, adjust the speed to 50-300r / min to stir the resin, start the vacuum degassing component to degas the resin for 10-15min to eliminate the air bubbles in the resin and avoid the formation of air bubble defects in the component after glue injection. S3 Multi-mold synchronous injection stage: Start the motor of the multi-mold diversion unit (2) to drive the gear metering pump of each branch injection circuit. After the resin is filtered by the filter of the feeding unit (1), it enters the diversion block of the multi-mold diversion unit (2) and is then distributed to each branch injection circuit to be injected into the corresponding mold. The flow meter, pressure sensor and temperature sensor of the full process monitoring unit (4) collect data once every 0.5s and transmit it to the cross-validation module (5). The cross-validation module (5) calculates the real-time injection volume of each branch through an adaptive weighted algorithm. When the real-time injection volume deviates from the target injection volume of the corresponding mold by more than 3%, the speed of the gear metering pump of that branch is adjusted to correct the injection flow rate. S4 Post-Injection Calculation Stage: When the real-time injection volume of a certain branch reaches the target injection volume of the corresponding mold, the gear metering pump of that branch is turned off, the pneumatic three-way ball valve of the multi-mold diversion unit (2) is switched to the circulation loop, and after all molds have completed injection, the weighing sensor data of the mixing tank and the weighing sensor data of the residual glue collection tank of the full process monitoring unit (4) are read, the actual injection volume is calculated, and the cross-validation module (5) confirms that the deviation between the actual injection volume and the target injection volume of each mold is ≤ ±2%. If the deviation exceeds the tolerance, the mold component is marked as to be re-inspected. S5 Cleaning Stage: Start the cleaning unit (3), open the solenoid valve, the liquid pump draws alcohol from the alcohol tank, and sprays it onto the inner wall of the mixing tank through the spray head. The pneumatic three-way ball valve of the multi-mode diversion unit (2) switches to the drain circuit. The alcohol flows through the feed pipeline, filter, diversion block, and branch glue injection circuit before being discharged to the waste liquid tank. The cycle spraying lasts for 10-15 minutes. After the spraying is completed, the liquid pump and solenoid valve are turned off, and compressed air is introduced to purge the pipeline for 1-2 minutes to remove residual alcohol. After cleaning is completed, the cross-validation module (5) automatically stores the full process data of this glue injection (including sensor data at each stage, parameter adjustment records, and glue injection volume calculation results), and a data report can be printed through the printer.

8. The multi-mold simultaneous injection RTM dispensing method according to claim 7, characterized in that, The adaptive weighting algorithm of the cross-validation module (5) is as follows: Pre-dispensing stage: Relying solely on the data from the weighing sensor in the mixing tank, assigning it 100% data weight, to confirm the accuracy of the initial dispensing volume; During the glue dispensing stage: assign 50% data weight to the flow meter, 30% data weight to the capacitive level gauge, and 20% data weight to the gear metering pump; When the data from a single sensor fluctuates by more than 5%, the weight allocation is automatically adjusted to ensure the accuracy of real-time glue dispensing volume calculation. Post-glue injection stage: relying solely on the calculation data from the weighing sensors of the residual glue aggregate tank and the mixing tank, the combined calculation result of the two is given 100% data weight to ultimately confirm the actual glue injection amount; Through the above dynamic weight allocation, the glue injection volume error is ≤±2%.

9. The multi-mold simultaneous injection RTM dispensing method according to claim 7, characterized in that, It also includes graded handling of anomalies in the dispensing process, specifically: in the multi-mold synchronous dispensing stage, the cross-validation module (5) grades and handles anomalies according to their type and severity. Mild abnormality: Automatically adjust the speed of the corresponding branch gear metering pump or the temperature of the feeding unit (1) water temperature machine, without stopping the machine; Moderate abnormality: Suspend the glue injection of this branch, keep other branches operating normally, and trigger the audible and visual alarm. After manual inspection of the pipeline and mold, restart the glue injection of this branch. Severe abnormality: Immediately suspend all branch glue injection, shut down the material supply unit (1), vacuum degassing component and multi-mold diversion unit (2) motor, conduct a comprehensive inspection of the equipment, and restart the glue injection process only after troubleshooting.

10. The multi-mold simultaneous injection RTM dispensing method according to claim 7, characterized in that, After the cleaning phase, the cross-validation module (5) encrypts the data of the entire dispensing process: The data file is encrypted using an encryption algorithm to generate a unique data identifier; Establish a three-tier access control system: administrator access, operator access, and visitor access. Different access levels are verified using a combination of account password and USB key. The encrypted data is automatically synchronized to the cloud server and stored for at least one year. Each data retrieval and modification generates an operation log to ensure that the data is traceable and cannot be tampered with.

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