Automatic lubricating oil spraying device for mold in production working state of neutral borosilicate glass bottle

Abstract

The invention relates to the technical field of automation equipment, and discloses a neutral borosilicate glass bottle production working state mold automatic lubricating oil spraying device which comprises a base, an oil supply assembly, a mechanical arm, an eruption assembly, a detection assembly and a controller. The detection assembly integrates a thermal infrared imager, a laser contour scanner and an oil film thickness detector and is used for obtaining the three-dimensional contour and surface temperature distribution of the mold and the thickness of a lubricated oil film in real time. And the control system generates a profiling motion track based on the three-dimensional contour data, and dynamically calculates the accurate spraying amount of each point on the track through a preset nonlinear mapping relation according to the real-time surface temperature distribution. And an ultrasonic atomization nozzle in the spraying assembly executes gradient atomization spraying, and closed-loop self-adaptive adjustment of spraying parameters is achieved through oil film thickness feedback. According to the real-time thermal state of the mold, precise, uniform and self-adaptive spraying of lubricating oil can be achieved, the lubricating quality and the production yield are improved, and the mold health state prediction capacity is achieved.

Description

An automatic lubricating oil spraying device for the working mold of a neutral borosilicate glass bottle production process Technical Field

[0001] This invention relates to the field of automation equipment technology, specifically to an automatic lubricating oil spraying device for the working mold of a neutral borosilicate glass bottle production process. Background Technology

[0002] In the production of high-end glass products such as neutral borosilicate glass bottles, precise and uniform lubrication of the molds, which operate at high temperatures, is a key process to ensure smooth product demolding, a smooth surface, and to extend the service life of the molds.

[0003] Currently, lubrication of glass molds mainly relies on manual spraying or simple robotic arms with fixed programs. However, these traditional methods have revealed their inherent limitations when dealing with complex production demands. Glass molds, especially their internal cavities, typically have complex curved contours, making it difficult for traditional lubrication methods to ensure that the lubricating oil forms a uniform oil film on all surfaces. The subjectivity and instability of manual operation, as well as the fixed motion trajectory of simple robotic arms, often lead to uneven distribution of lubricating oil on the mold surface, resulting in insufficient lubrication or excessive accumulation in certain areas, which directly affects the quality of the final product.

[0004] More importantly, during continuous high-speed production, a dynamically changing and non-uniform temperature field forms on the mold surface. Current technologies generally lack the ability to sense the real-time thermal state of the mold, typically employing a constant coating amount for indiscriminate treatment of the entire mold. This one-size-fits-all lubrication strategy cannot adapt to the differentiated lubrication needs of different areas of the mold due to varying temperatures. In higher-temperature areas, the lubricating oil burns and fails too quickly, resulting in insufficient lubrication; while in lower-temperature areas, it leads to lubricating oil waste and carbon buildup. This crude control method not only reduces lubrication efficiency but also fails to fundamentally optimize product yield.

[0005] Furthermore, the industry generally adopts reactive maintenance or preventative maintenance strategies based on a fixed number of cycles for the management of molds, a core production component. This approach lacks real-time insight and scientific prediction of mold health status, often leading to unplanned downtime due to sudden wear or damage, significantly impacting production continuity and economic efficiency. Therefore, achieving intelligent, adaptive, and precise lubrication of working molds and introducing predictive maintenance mechanisms are pressing technical challenges that need to be addressed in this field. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides an automatic lubricating oil spraying device for neutral borosilicate glass bottle production molds in working condition. This solves the problem that existing glass mold lubrication methods are unable to accurately and differentiate the spraying based on the real-time, non-uniform temperature distribution of the mold under high-temperature working conditions, resulting in uneven lubrication, oil waste, and low product yield.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an automatic lubricating oil spraying device for a neutral borosilicate glass bottle production mold, comprising a base, an oil supply component provided on one side of the upper surface of the base for supplying constant-temperature silicone oil, a robotic arm provided in the middle of the upper surface of the base, a spraying component provided at the output end of the robotic arm for atomizing and spraying the liquid constant-temperature silicone oil onto the outer surface of the glass bottle, a detection component provided on the outer surface of the robotic arm near the output end for collecting and detecting the state data of the mold before and after being covered with constant-temperature silicone oil, and a controller provided on the other side of the upper surface of the base, the controller integrating a control system for controlling the working state of the robotic arm, the oil supply component, and the spraying component according to the state data collected by the detection component;

[0008] The detection components include: a laser contour scanner, fixed to one side of the outer surface of the robotic arm near the output end, for acquiring three-dimensional data of the mold surface; an oil film thickness detector, fixed to the other side of the outer surface of the robotic arm near the output end, for real-time detection of the oil film thickness on the mold surface; and an infrared thermal imager, fixed to the upper surface of the controller, for real-time monitoring of the temperature distribution on the mold surface.

[0009] Preferably, the oil supply assembly includes a main oil tank and an auxiliary oil tank, which are fixedly connected to one side of the upper surface of the base. The output end of the main oil tank is connected to an oil pump. The main oil tank and the auxiliary oil tank are connected by a pipeline. The oil pump is connected between the main oil tank and the auxiliary oil tank. Multiple heaters are installed on the outside of the auxiliary oil tank. The output end of the auxiliary oil tank is connected to a metering pump. The output end of the auxiliary oil tank is connected to the ejection assembly by a pipeline. The metering pump is connected between the output end of the auxiliary oil tank and the ejection assembly. An electric heating strip is provided on the outer surface of the pipeline between the output end of the auxiliary oil tank and the ejection assembly.

[0010] Preferably, the ejection assembly includes a receiving ring, which is installed at the output end of the robotic arm. The outer surface of the receiving ring is connected to a plurality of ultrasonic atomizing nozzles. A heat insulation sleeve is provided on the outside of each ultrasonic atomizing nozzle. A motor is fixedly connected to the side surface of the receiving ring. An annular scraper is fixedly connected to the output end of the motor. The annular scraper is rotatably connected inside the receiving ring and is used to wipe the ultrasonic atomizing nozzles.

[0011] Preferably, the ultrasonic atomizing nozzle has a piezoelectric transducer, a honeycomb damper, and a spiral guide vane arranged sequentially inside along the constant temperature silicone oil injection direction. The output end of the ultrasonic atomizing nozzle has a Venturi tube structure. The piezoelectric transducer is used to generate ultrasonic vibration to atomize the lubricating oil. The honeycomb damper and the spiral guide vane are used to adjust the atomization effect.

[0012] Preferably, a guardrail is fixedly connected to the edge of the upper surface of the base.

[0013] A second aspect of the present invention provides a control system applied to the aforementioned device, the control system comprising: a status data processing unit for real-time processing of mold surface temperature acquired by an infrared thermal imager in the detection component and mold three-dimensional contour data acquired by a laser contour scanner; a spraying parameter dynamic generation unit for dynamically calculating the amount of lubricating oil sprayed based on the real-time surface temperature of the mold through a preset nonlinear mapping relationship between temperature and lubrication amount, and generating a motion trajectory in combination with the three-dimensional contour data; and a work control unit for generating and sending control commands based on the amount of lubricating oil sprayed and the motion trajectory to control the robotic arm, the oil supply component, and the spraying component to perform spraying operations.

[0014] Preferably, in the nonlinear mapping relationship between temperature and lubrication amount, the amount of lubricating oil sprayed increases with the increase of the mold surface temperature within the operating temperature range, and the rate of increase of the amount of lubricating oil sprayed also increases with the increase of the mold surface temperature. In a specific embodiment, the nonlinear mapping relationship between temperature and lubrication amount is realized by the following mathematical model: ;in, The calculated instantaneous lubricating oil spray rate (unit: mL / s); The mold surface temperature (in °C) corresponding to the current path point is obtained from the surface temperature matrix; It is a comprehensive physical property coefficient, which is related to the physical properties of the specific type of lubricating oil and mold material used; This is a basic lubrication offset constant, representing the basic coating amount at the reference temperature; It is a temperature sensitivity index for the lubrication process, which determines the degree to which the amount of coating changes with temperature. The amount of coating is determined by the real-time temperature of the mold.

[0015] Preferably, when generating the control command, the operation control unit is also used to dynamically adjust the driving frequency and duty cycle of the ultrasonic atomizing nozzle applied to the ejection assembly to complete gradient atomization. The gradient atomization includes at least two stages: initial spreading of oil mist with a first average particle size generated by a first combination of driving parameters, and main film formation of oil mist with a second average particle size generated by a second combination of driving parameters.

[0016] Preferably, the control system is further configured to receive oil film thickness feedback data measured by the oil film thickness detector in the detection component, compare the oil film thickness feedback data with a preset thickness target value, and adaptively adjust the parameters of the nonlinear mapping relationship between temperature and lubrication amount according to the comparison result.

[0017] Preferably, the control system further integrates a mold health status prediction model based on a long short-term memory network. The mold health status prediction model receives and records historical operating data of the device, and outputs a predicted value for the remaining service life of the mold based on learning and analysis of the historical operating data. The historical operating data includes the cumulative number of mold working cycles, historical temperature fluctuation data, and cumulative lubricant consumption.

[0018] This invention provides an automatic lubricating oil spraying device for the working mold of neutral borosilicate glass bottle production. It has the following beneficial effects: 1. By setting up a laser contour scanner and a six-degree-of-freedom robotic arm, this invention can accurately acquire the three-dimensional contour data of the mold surface and plan the contour motion trajectory. Combined with an ultrasonic atomizing nozzle that can generate uniform oil mist, it achieves high-precision, full-coverage, and uniform spraying on the surface of complex mold cavities. This method overcomes the problems of uneven lubricant film thickness, local over-lubrication, or omissions caused by the subjectivity and limitations of traditional manual or semi-automatic spraying. 2. This invention uses an infrared thermal imager to monitor the mold's working temperature in real time and utilizes a preset nonlinear mapping relationship between temperature and lubrication volume within the control system to dynamically calculate and adjust the amount of lubricant sprayed. This control strategy ensures that the lubricant supply accurately matches the actual lubrication needs of the mold at different working temperatures, avoiding premature lubricant failure due to temperature increases or resource waste and environmental pollution caused by over-spraying, achieving intelligent and adaptive precision lubrication. 3. This invention integrates a mold health status prediction model based on a long short-term memory network into the control system, enabling continuous learning and analysis of historical operating data, such as temperature fluctuations, oil consumption, and number of working cycles, thereby scientifically predicting the mold's wear trend and remaining service life. This function allows enterprises to implement predictive maintenance, schedule mold repairs or replacements in advance, reduce unexpected production line downtime due to sudden mold failures, and improve equipment reliability and production continuity. Attached Figure Description

[0019] Figure 1 is a perspective view of the device of the present invention; Figure 2 is a top view of the device of the present invention; Figure 3 is a schematic diagram of the oil supply component of the present invention; Figure 4 is a schematic diagram of the detection component of the present invention; Figure 5 is a display diagram of the ejection component of the present invention; Figure 6 is a cross-sectional view of the ultrasonic atomizing nozzle of the present invention; Figure 7 is a schematic diagram of the working process of the device of the present invention; Figure 8 is a schematic diagram of the intelligent control method of the present invention.

[0020] The components include: 1. Base; 2. Oil supply assembly; 3. Robotic arm; 4. Spray assembly; 5. Detection assembly; 6. Controller; 7. Control system; 201. Main oil tank; 202. Auxiliary oil tank; 203. Oil pump; 204. Pipeline; 205. Heater; 206. Metering pump; 207. Electric heating belt; 401. Receiving ring; 402. Ultrasonic atomizing nozzle; 403. Heat insulation sleeve; 404. Motor; 405. Annular scraper; 4021. Piezoelectric transducer; 4022. Honeycomb damper; 4023. Spiral guide vane; 501. Laser profile scanner; 502. Oil film thickness detector; 503. Infrared thermal imager. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Referring to Figures 1 and 2, this invention provides an automatic lubricating oil spraying device for the working mold of a neutral borosilicate glass bottle production system. The physical layout of the device is as follows: The device includes a base 1, which serves as the supporting platform for the entire device. The upper surface of the base 1 is divided into three main areas: one side for mounting the oil supply assembly 2, the middle for mounting the robotic arm 3, and the other side for mounting the controller 6. This layout clearly defines the functional units and facilitates pipeline connection and maintenance.

[0023] The oil supply assembly 2, the base of the robotic arm 3, and the controller 6 are all fixedly mounted on the upper surface of the base 1. The controller 6 integrates a control system 7, which controls the operation of the oil supply assembly 2 and the robotic arm 3 via electrical connections.

[0024] At the end of the robotic arm 3, an end effector is integrated. This end effector comprises a firing assembly 4 and a detection assembly 5. Specifically, the firing assembly 4 is fully installed at the output end of the robotic arm 3. The laser profile scanner 501 and the oil film thickness detector 502 in the detection assembly 5 are respectively fixed to both sides of the outer surface of the robotic arm 3 near the output end and move together with the robotic arm 3.

[0025] Another component of the detection assembly 5, namely the infrared thermal imager 503, is fixedly installed. The infrared thermal imager 503 is fixed to the upper surface of the controller 6, and its lens field of view is configured to completely cover the entire working area where the mold to be lubricated is located, thereby realizing non-contact, instantaneous global temperature measurement of the mold surface. The temperature data it collects is transmitted to the control system 7 in the controller 6 through a data cable.

[0026] Referring to Figure 7, the coordinated operation steps of the device in a complete lubrication cycle are as follows: First, the device is in standby mode, and the robotic arm 3 remains at the preset origin or safe position. When the external production line control system sends a signal indicating that a mold to be lubricated in a high-temperature working state has entered the lubrication station and been positioned, the controller 6 receives the start signal and begins to execute the automatic lubrication operation.

[0027] After the operation begins, the data acquisition phase commences first. The fixedly installed infrared thermal imager 503 is triggered, instantly capturing a complete thermal infrared image of the mold surface. This image data is then converted into a two-dimensional surface temperature matrix containing the specific temperature values ​​of each coordinate point and sent to the control system 7. Simultaneously or shortly thereafter, the control system 7 drives the robotic arm 3 to move along a preset scanning path. During this process, the laser contour scanner 501, installed at the end of the robotic arm 3, projects a linear laser beam onto the mold surface. By acquiring the laser contour information and combining it with the spatial position data of the robotic arm 3, a three-dimensional point cloud data model that accurately describes the shape of the mold surface is generated and sent to the control system 7.

[0028] Next, the decision-making phase begins. The state data processing unit 701 within the control system 7 receives the aforementioned surface temperature matrix and three-dimensional point cloud data. The spraying parameter dynamic generation unit 702, based on the three-dimensional point cloud data, generates a spraying motion trajectory that maintains a constant distance from the mold surface contour using a normal offset algorithm. Simultaneously, this unit spatially registers the surface temperature matrix with the three-dimensional point cloud data, ensuring that each point on the trajectory corresponds to a specific real-time temperature value. For each point on the trajectory, the unit calculates the precise lubricant spraying amount corresponding to that point's temperature based on a preset nonlinear mapping relationship between temperature and lubrication amount, thus forming a dynamic spraying amount parameter sequence that varies along the entire trajectory.

[0029] Upon entering the execution phase, the operation control unit 703 within the control system 7 compiles the generated spraying motion trajectory into executable motion commands for the robotic arm 3 and sends them to the servo drive system of the robotic arm 3. Simultaneously, the operation control unit 703 converts the dynamic spraying quantity parameter sequence into real-time flow control commands for the metering pump 206 in the oil supply assembly 2, and generates drive control signals for the ultrasonic atomizing nozzle 402 in the spraying assembly 4. The robotic arm 3 drives the spraying assembly 4 at its end to move strictly along the planned trajectory. The metering pump 206 precisely delivers the corresponding flow rate of constant-temperature silicone oil, and the ultrasonic atomizing nozzle 402 atomizes the silicone oil under the changing drive signals, completing the spraying operation on the mold surface.

[0030] After the spraying operation is completed, the feedback phase can be selectively initiated. The control system 7 drives the robotic arm 3 to move along a preset detection path and activates the oil film thickness detector 502. The oil film thickness detector 502 performs non-contact measurement at one or more key locations on the mold surface to obtain the actual generated oil film thickness data. This feedback data is sent back to the spraying parameter dynamic generation unit 702 and compared with the preset thickness target value. If a deviation exists, an adaptive adjustment algorithm is used to fine-tune one or more parameters in the aforementioned nonlinear mapping relationship between temperature and lubrication volume. The corrected parameters will be used in the calculation of the next work cycle.

[0031] Finally, the system enters the reset phase. After completing all painting and inspection tasks, the operation control unit 703 instructs the robotic arm 3 to return to its initial standby position. Simultaneously, all process data recorded during this cycle, including mold temperature distribution, actual lubricant consumption, and number of work cycles, is recorded and input as historical data into the mold health status prediction model integrated into the control system 7 for long-term trend analysis. After issuing a work completion signal, the device enters standby mode, awaiting the start of the next work cycle.

[0032] Referring to Figures 1, 2 and 3, the function of the oil supply component 2 is to provide the ejection component 4 with silicone oil with precise and controllable flow rate and constant temperature.

[0033] The oil supply assembly 2 adopts a dual-tank structure, including a main oil tank 201 and a secondary oil tank 202, both of which are fixed on the base 1. The main oil tank 201 is used to store a large capacity of spare silicone oil at room temperature. The secondary oil tank 202 serves as a small-capacity heating and buffer unit, used to precisely heat the silicone oil to be used to the preset process temperature.

[0034] The output of the main oil tank 201 is connected to the input of an oil pump 203 via a pipe 204, and the output of the oil pump 203 is connected to the input of the auxiliary oil tank 202 via a pipe 204. The oil pump 203 is used to replenish silicone oil from the main oil tank 201 to the auxiliary oil tank 202. The auxiliary oil tank 202 is equipped with a liquid level sensor. When the liquid level is lower than the preset lower limit, the controller 6 starts the oil pump 203 to replenish the oil until the liquid level reaches the preset upper limit.

[0035] To achieve constant temperature control, multiple heaters 205 are evenly installed on the outer wall of the auxiliary oil tank 202. A temperature sensor is also installed inside the auxiliary oil tank 202, and this temperature sensor is electrically connected to the controller 6. Based on the difference between the real-time oil temperature fed back by the temperature sensor and the preset target temperature, the controller 6 adjusts the power applied to the heaters 205 using a PID proportional-integral-derivative control algorithm, thereby achieving closed-loop precise control of the silicone oil temperature inside the auxiliary oil tank 202.

[0036] The output end of the auxiliary oil tank 202 is connected to the spraying assembly 4 via a pipeline 204. A metering pump 206 is installed in series on this pipeline. The metering pump 206 is a high-precision positive displacement pump, and its instantaneous flow rate has a strictly linear relationship with the speed of the drive motor. The operation control unit 703 in the controller 6 adjusts the speed of the metering pump 206 in real time according to the dynamically calculated lubricating oil spraying amount, thereby achieving precise control of the silicone oil flow rate delivered to the spraying assembly 4.

[0037] To ensure that the temperature of the constant-temperature silicone oil does not drop during the process of being transported from the auxiliary oil tank 202 to the spraying assembly 4, an electric heating strip 207 is wrapped around the outer surface of the pipe 204 connecting the two. The electric heating strip 207 is also controlled by the closed-loop controller 6 to compensate for the heat loss of the pipe and ensure that the temperature of the silicone oil is maintained at the preset process temperature value when it reaches the ultrasonic atomizing nozzle 402.

[0038] Referring to Figures 4 and 5, the spraying assembly 4 is installed on the output end of the robotic arm 3. Its function is to receive the constant temperature silicone oil from the oil supply assembly 2, atomize it into an oil mist with a specific shape, and then spray it evenly onto the mold surface.

[0039] The overall structure of the ejection assembly 4 is based on a receiving ring 401. The receiving ring 401 has an internally hollow flow channel, the inlet of which is connected to the pipe 204 from the oil supply assembly 2. On the outer surface of the receiving ring 401, multiple ultrasonic atomizing nozzles 402 are uniformly connected in the circumferential direction. The constant temperature silicone oil is distributed to each ultrasonic atomizing nozzle 402 through the internal flow channel of the receiving ring 401.

[0040] Referring to Figure 6, inside each ultrasonic atomizing nozzle 402, along the flow direction of the constant-temperature silicone oil, a piezoelectric transducer 4021, a honeycomb damper 4022, and a spiral guide vane 4023 are sequentially arranged. The piezoelectric transducer 4021 is a component that converts electrical energy into high-frequency mechanical vibration. It receives a high-frequency electrical drive signal from the controller 6 and generates mechanical vibration with a frequency in the range of 20kHz to 100kHz. This vibration is transmitted to the silicone oil flowing over its surface, exciting high-frequency capillary waves on the oil surface. When the amplitude of the capillary waves exceeds a critical value, droplets detach from the wave crest, thereby forming micron-sized oil mist particles. This process is ultrasonic atomization.

[0041] The initial oil mist generated by the piezoelectric transducer 4021 then enters the honeycomb damper 4022. This damper is a structure with multiple parallel microporous channels. When the oil mist passes through these microporous channels, the turbulence inside is suppressed and the flow velocity tends to be uniform, thereby making the subsequent oil mist jet more stable and concentrated.

[0042] The oil mist flowing from the honeycomb damper 4022 continues to the spiral guide vane 4023. The spiral guide vane 4023 is a set of blades with a specific helical angle, which causes the passing oil mist to rotate. This rotational motion helps to form a spray pattern with a specific cone angle after spraying and improves the uniformity of oil mist particle adhesion on complex mold surfaces.

[0043] The output end of the ultrasonic atomizing nozzle 402 is machined into a Venturi tube structure. This structure includes a contraction section and an expansion section. The oil mist increases in velocity as it passes through the throat of the contraction section, and then decelerates and expands in the subsequent expansion section. This process helps to further stabilize the oil mist morphology and utilizes airflow to assist in the directional spraying of the oil mist onto the mold surface.

[0044] To ensure the long-term stability of the device, the spraying assembly 4 is also equipped with auxiliary function modules. A heat insulation sleeve 403 made of high-temperature resistant ceramic fiber material is fitted onto the outer surface of each ultrasonic atomizing nozzle 402 to block heat radiation and heat conduction from the high-temperature mold, protecting the internal piezoelectric transducer 4021 and other components from high temperatures. Simultaneously, a micro motor 404 is fixedly installed on the side surface of the receiving ring 401, and the output shaft of this motor 404 is fixedly connected to an annular scraper 405. The annular scraper 405 is rotatably connected inside the receiving ring 401, with its scraping edge in close contact with the end faces of all ultrasonic atomizing nozzles 402. The controller 6 can automatically start the motor 404 to drive the annular scraper 405 to rotate one revolution after each fixed number of working cycles (e.g., every 10 cycles) or during the equipment self-check process before each production batch begins, according to a preset program, to complete one self-cleaning operation.

[0045] Referring to Figures 1 and 4, the function of the detection component 5 is to provide the control system 7 with multi-dimensional status data such as the three-dimensional geometry of the mold, surface temperature distribution, and the thickness of the oil film after lubrication.

[0046] The detection component 5 consists of three independent sensors. Among them, the laser profile scanner 501 and the oil film thickness detector 502 are integrated into the end effector of the robotic arm 3, moving with the robotic arm 3. The laser profile scanner 501 is mounted on one side of the end effector, projecting a linear laser beam onto the mold surface. Simultaneously, its built-in image sensor captures the deformation of the laser beam caused by the mold surface profile. As the robotic arm 3 moves the scanner along a predetermined path across the mold surface, it continuously acquires a series of two-dimensional profile data. The control system 7 combines this two-dimensional profile data with the precise spatial pose data of the robotic arm 3 at each moment, and through coordinate transformation and data fusion algorithms, reconstructs a high-density three-dimensional point cloud data model that can describe the complete surface of the mold.

[0047] An oil film thickness gauge 502 is mounted on the other side of the end effector. In this embodiment, it employs the principle of spectral confocal measurement. The gauge emits a broad-spectrum composite light beam and focuses it onto the mold surface. The beam is reflected at the air-oil interface and the oil film-mold substrate interface. The two reflected beams interfere due to the optical path difference, and the spectrometer inside the gauge analyzes the returned interference spectrum. By performing Fourier transform or other algorithm processing on specific frequency components of the interference spectrum, the distance between the two reflecting interfaces, i.e., the thickness of the oil film, can be accurately calculated. This measurement is non-contact, and the real-time thickness data output in micrometers is used for quality verification and closed-loop feedback adjustment of control parameters after the spraying operation.

[0048] The infrared thermal imager 503 is fixedly mounted on the upper surface of the controller 6 or on a separate bracket. Its installation position and lens field of view are pre-set to ensure that the entire working area of ​​the mold to be lubricated is within its monitoring range. The imager contains a focal plane array detector to receive infrared radiation emitted from the mold surface. The detector converts the received radiation intensity signal into an electrical signal, which is then processed by an internal processor to calculate the temperature of each point on the mold surface based on Planck's blackbody radiation law and preset material emissivity parameters. This results in a complete two-dimensional temperature distribution map composed of multiple pixels and their corresponding temperature values. This temperature map data is transmitted in real-time to the control system 7 via a data interface, serving as the core basis for dynamically calculating the amount of lubricating oil sprayed.

[0049] In a preferred embodiment of the present invention, in order to recover excess oil mist that does not adhere to the mold surface during the spraying process and reduce pollution to the production environment, the spraying component 4 also integrates a negative pressure residual oil recovery system.

[0050] The negative pressure residual oil recovery system includes an annular negative pressure suction hood and a multi-stage filter. The negative pressure suction hood is fixedly connected to the receiving ring 401 of the spray assembly 4, and its opening faces the same direction as the spray direction of the ultrasonic atomizing nozzle 402 and protrudes slightly from the nozzle end face, so as to effectively capture the oil mist around the spray assembly 4 when it is working.

[0051] The output of the negative pressure suction hood is connected to the input of a multi-stage filter via a flexible pipe. The multi-stage filter, arranged sequentially along the airflow direction, consists of: a first-stage wire mesh filter to intercept and condense larger oil droplets; a second-stage fiber cotton filter to adsorb smaller oil mist particles; and a third-stage activated carbon filter to adsorb gaseous oil molecules. The clean air after multi-stage filtration is finally discharged through an exhaust fan. The recovered liquid silicone oil can be collected and reused. This recovery system is synchronously controlled by controller 6, starting at the beginning of the spraying operation and stopping after it ends.

[0052] The control system 7 is integrated within the controller 6. In terms of hardware, it includes a processor, memory, and input / output interfaces for communication with external devices. In terms of software, the control system 7 is divided into three cooperative functional units: a status data processing unit 701, a dynamic spraying parameter generation unit 702, and a work control unit 703.

[0053] The state data processing unit 701 is the data input and preprocessing front end of the control system 7. Its function is to receive raw data from various sensors in the detection component 5 and convert it into a standardized data format suitable for subsequent calculations. Specifically, this unit receives raw image data containing radiation intensity information collected by the infrared thermal imager 503 and, based on preset emissivity parameters of the mold material, calculates it into a two-dimensional surface temperature matrix. Simultaneously, this unit receives a series of two-dimensional contour data collected by the laser contour scanner 501 during its movement and, combined with real-time pose data obtained from the controller of the robotic arm 3, fuses them into a three-dimensional point cloud data model in a unified coordinate system through coordinate system transformation and point cloud registration algorithms.

[0054] The spraying parameter dynamic generation unit 702 is the core decision-making unit of the control system 7. This unit receives the surface temperature matrix and three-dimensional point cloud data model output by the state data processing unit 701. Based on the three-dimensional point cloud data, this unit automatically generates a contouring motion trajectory that maintains a constant distance and orientation between the spraying component 4 and the mold surface through an algorithm that applies equal offsets along the point cloud normal vector direction. Subsequently, this unit spatially aligns the surface temperature matrix with the three-dimensional point cloud data, thereby assigning a precise real-time temperature value to each path point on the contouring motion trajectory. For each path point, this unit calls a preset nonlinear mapping relationship between temperature and lubrication amount to dynamically calculate the amount of lubricating oil sprayed that matches the temperature at that point.

[0055] In a specific embodiment, the nonlinear mapping relationship between temperature and lubrication quantity is realized through the following mathematical model: ;in, The calculated instantaneous lubricating oil spray rate (unit: mL / s); The mold surface temperature (in °C) corresponding to the current path point is obtained from the surface temperature matrix; It is a comprehensive physical property coefficient, which is related to the physical properties of the specific type of lubricating oil and mold material used; This is a basic lubrication offset constant, representing the basic coating amount at the reference temperature; It is a temperature sensitivity index for the lubrication process, which determines the degree to which the amount of coating changes with temperature. The amount of coating is determined by the real-time temperature of the mold.

[0056] The operation control unit 703 serves as the command output and execution backend of the control system 7. This unit receives the contour motion trajectory and the synchronized dynamic spraying quantity sequence output by the spraying parameter dynamic generation unit 702. The unit decomposes the contour motion trajectory into a sequence of low-level motion commands (e.g., commands containing parameters such as position, speed, and acceleration) recognizable by the robotic arm 3 controller. Simultaneously, the unit converts the dynamic spraying quantity sequence into a real-time speed control signal for the metering pump 206 in the oil supply assembly 2, and a drive electrical signal for the ultrasonic atomizing nozzle 402 in the spraying assembly 4, including parameters such as frequency and duty cycle. Finally, this unit sends these compiled low-level control commands through input / output interfaces to the controller of the robotic arm 3, the driver of the metering pump 206, and the signal generator of the ultrasonic atomizing nozzle 402, thereby driving the hardware to perform precise spraying operations.

[0057] Referring to Figure 8, the control system 7 achieves intelligent control of the lubrication operation by executing a series of precise steps.

[0058] The specific steps of this method are as follows: First, after the spraying parameter dynamic generation unit 702 generates the contour motion trajectory and spatially registers it with the surface temperature matrix, the system begins to perform dynamic calculation of the spraying amount based on real-time temperature. For each discrete path point on the trajectory, the system extracts the mold surface temperature value corresponding to that point. Subsequently, this temperature value is substituted into the preset mathematical model of the nonlinear mapping relationship between temperature and lubrication amount to calculate the instantaneous lubricating oil spraying amount required for that path point. By repeating this calculation for all points on the trajectory, the system generates a spraying amount data sequence that is completely synchronized with the motion trajectory and dynamically changes with position and temperature.

[0059] Secondly, the operation control unit 703 implements a gradient atomization strategy during the spraying operation. In a complete spraying stroke, the unit divides the spraying process into at least two stages. In the first stage, the initial spreading stage, the operation control unit 703 sends a first combination of driving parameters to the driver of the ultrasonic atomizing nozzle 402, such as a lower driving frequency (e.g., 25 kHz) and a higher duty cycle (e.g., 80%). This parameter combination causes the piezoelectric transducer 4021 to vibrate at a lower frequency, thereby atomizing an oil mist with a first average particle size (e.g., 50 μm). This larger particle size oil mist helps to quickly wet the high-temperature mold surface. After completing the initial spreading, the system seamlessly switches to the second stage, the main film formation stage. The operation control unit 703 sends a second combination of driving parameters, such as a higher driving frequency (e.g., 60 kHz) and a lower duty cycle (e.g., 60%), thereby producing a finer oil mist with a second average particle size (e.g., 20 μm) for building a uniform and dense final lubricating oil film.

[0060] Secondly, after the spraying operation is completed, the system performs closed-loop adaptive adjustment based on oil film thickness feedback. The oil film thickness detector 502 measures the oil film thickness at one or more predetermined key points on the mold surface and feeds back the measured actual oil film thickness data to the control system 7. The spraying parameter dynamic generation unit 702 compares this feedback value with the preset thickness target value stored in the system and calculates the deviation between the two. This deviation value is input to a PID (Proportional-Integral-Derivative) controller. Based on this deviation value, the PID controller calculates the adjustment amount for the parameters in the nonlinear mapping relationship between temperature and lubrication quantity. For example, if the measured thickness remains too thin, the controller will output a positive adjustment amount to slightly increase the value of the comprehensive physical property coefficient or the basic lubrication offset constant. These adjusted parameters are saved and applied to subsequent lubrication operation cycles, thereby allowing the system's spraying accuracy to continuously converge to the target value through continuous learning.

[0061] Finally, at the end of each work cycle, the system performs a mold health status prediction based on a Long Short-Term Memory (LSTM) network. Control system 7 automatically records and stores key historical operational data for this operation, forming a data vector. This vector includes at least: the cumulative number of mold work cycles, the average surface temperature of this operation, historical temperature fluctuation data (such as variance), and cumulative lubricant consumption. These data vectors form a multi-dimensional time series in chronological order. The pre-trained LSTM mold health status prediction model integrated into control system 7 uses this time series as input. Through learning and analysis of historical data, the model can capture subtle degradation trends in mold performance over time and output a quantitative assessment of the mold's current health status, such as the predicted number of days or percentage of remaining useful life (RUL). When this predicted value falls below a preset maintenance threshold, control system 7 automatically triggers an alarm signal, prompting management personnel to inspect the mold or prepare for replacement.

Claims

1. An automatic lubricating oil spraying device for a working mold in the production of neutral borosilicate glass bottles, comprising a base (1), characterized in that, An oil supply assembly (2) is provided on one side of the upper surface of the base (1). The oil supply assembly (2) is used to provide constant temperature silicone oil. A robotic arm (3) is provided in the middle of the upper surface of the base (1). An ejection assembly (4) is provided at the output end of the robotic arm (3). The ejection assembly (4) is used to atomize the liquid constant temperature silicone oil and spray it onto the outer surface of the glass bottle. A detection assembly (5) is provided on the outer surface of the robotic arm (3) near the output end. The detection assembly (5) is used to collect data on the state of the detection mold before and after being covered with constant temperature silicone oil. A controller (6) is provided on the other side of the upper surface of the base (1). The controller (6) integrates a control system (7). The control system (7) is used to control the working state of the robotic arm (3), the oil supply component (2) and the spraying component (4) according to the status data collected by the detection component (5); the detection component (5) includes: a laser contour scanner (501), which is fixed on one side of the outer surface of the robotic arm (3) near the output end, for acquiring three-dimensional data of the mold surface; an oil film thickness detector (502), which is fixed on the other side of the outer surface of the robotic arm (3) near the output end, for real-time detection of the oil film thickness of the mold surface; and an infrared thermal imager (503), which is fixed on the upper surface of the controller (6), for real-time monitoring of the temperature distribution of the mold surface.

2. The automatic lubricating oil spraying device for the working mold of a neutral borosilicate glass bottle production according to claim 1, characterized in that, The oil supply assembly (2) includes a main oil tank (201) and an auxiliary oil tank (202). The main oil tank (201) and the auxiliary oil tank (202) are fixedly connected to one side of the upper surface of the base (1). The output end of the main oil tank (201) is connected to an oil pump (203). The main oil tank (201) and the auxiliary oil tank (202) are connected through a pipeline (204). The oil pump (203) is connected between the main oil tank (201) and the auxiliary oil tank (202). 2) Multiple heaters (205) are installed on the outside. The output end of the auxiliary oil tank (202) is connected to a metering pump (206). The output end of the auxiliary oil tank (202) is connected to the ejection assembly (4) through a pipeline (204). The metering pump (206) is connected between the output end of the auxiliary oil tank (202) and the ejection assembly (4). An electric heating belt (207) is provided on the outer surface of the pipeline (204) between the output end of the auxiliary oil tank (202) and the ejection assembly (4).

3. The automatic lubricating oil spraying device for the working mold of a neutral borosilicate glass bottle production according to claim 2, characterized in that, The ejection assembly (4) includes a receiving ring (401) which is installed at the output end of the robotic arm (3). The outer surface of the receiving ring (401) is connected to a plurality of ultrasonic atomizing nozzles (402). The ultrasonic atomizing nozzles (402) are provided with heat insulation sleeves (403) on their exterior. A motor (404) is fixedly connected to the side surface of the receiving ring (401). An annular scraper (405) is fixedly connected to the output end of the motor (404). The annular scraper (405) is rotatably connected inside the receiving ring (401) and is used to wipe the ultrasonic atomizing nozzles (402).

4. The automatic lubricating oil spraying device for the working mold of a neutral borosilicate glass bottle production according to claim 3, characterized in that, The ultrasonic atomizing nozzle (402) is equipped with a piezoelectric transducer (4021), a honeycomb damper (4022), and a spiral guide vane (4023) arranged sequentially along the constant temperature silicone oil injection direction. The output end of the ultrasonic atomizing nozzle (402) has a Venturi tube structure. The piezoelectric transducer (4021) is used to generate ultrasonic vibration to atomize the lubricating oil. The honeycomb damper (4022) and the spiral guide vane (4023) are used to adjust the atomization effect.

5. The automatic lubricating oil spraying device for the working mold of a neutral borosilicate glass bottle production according to claim 1, characterized in that, A guardrail is fixedly connected to the edge of the upper surface of the base (1).

6. The automatic lubricating oil spraying device for the working mold of a neutral borosilicate glass bottle production according to claim 1, characterized in that, The control system includes: a status data processing unit, used to process in real time the mold surface temperature collected by the infrared thermal imager in the detection component, and the three-dimensional contour data of the mold collected by the laser contour scanner; a spraying parameter dynamic generation unit, used to dynamically calculate the amount of lubricating oil sprayed based on the real-time surface temperature of the mold and through a preset nonlinear mapping relationship between temperature and lubrication amount, and generate a motion trajectory in combination with the three-dimensional contour data; and a work control unit, used to generate and send control commands based on the amount of lubricating oil sprayed and the motion trajectory, to control the robotic arm, the oil supply component, and the spraying component to perform the spraying operation.

7. The automatic lubricating oil spraying device for the working mold of a neutral borosilicate glass bottle production according to claim 6, characterized in that, The nonlinear mapping relationship between temperature and lubrication amount specifically includes: the amount of lubricating oil sprayed increases as the surface temperature of the mold increases within the working temperature range, and the rate of increase of the amount of lubricating oil sprayed also increases as the surface temperature of the mold increases.

8. The automatic lubricating oil spraying device for the working mold of a neutral borosilicate glass bottle production according to claim 6, characterized in that, When generating the control command, the operation control unit is also used to: dynamically adjust the driving frequency and duty cycle of the ultrasonic atomizing nozzle applied to the ejection assembly, thereby completing gradient atomization; the gradient atomization includes at least two stages: initial spreading of oil mist with a first average particle size generated by using a first combination of driving parameters; The second driving parameter combination generates an oil mist with a second average particle size for bulk film formation.

9. The automatic lubricating oil spraying device for the working mold of a neutral borosilicate glass bottle production according to claim 6, characterized in that, The control system is further configured to: receive oil film thickness feedback data measured by the oil film thickness detector in the detection component; compare the oil film thickness feedback data with a preset thickness target value; and adaptively adjust the parameters of the nonlinear mapping relationship between temperature and lubrication amount based on the comparison result.

10. The automatic lubricating oil spraying device for the working mold of a neutral borosilicate glass bottle production according to claim 6, characterized in that, The control system also integrates a mold health status prediction model based on a long short-term memory network. Specifically, the mold health status prediction model receives and records the historical operating data of the device, and outputs a predicted value of the remaining service life of the mold based on the learning and analysis of the historical operating data. The historical operating data includes the cumulative number of working cycles of the mold, historical temperature fluctuation data, and cumulative lubricating oil consumption.

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