Injection mold temperature control method and system

Abstract

The application provides a kind of injection mold temperature control method and system, it is related to data processing technical field, the method includes: according to temperature sequence data analysis each target temperature control region temperature variation slope and change lag feature, generate time delay information;According to time delay information and the structure geometric parameter inside injection mold, execute lag area feature modeling processing, generate structure response information;According to structure response information, construct the time sequence compensation waterway model of lag area, and time sequence parameter and flow parameter are paired calculation, generate time sequence compensation information;According to time sequence compensation information, make compensation fluid enter lag area according to time sequence parameter in advance or delay, generate execution information;According to execution information, the flow distribution of compensation fluid in lag area is executed matching adjustment processing, generate updated regional temperature distribution information;According to regional temperature distribution information, update continuous temperature sequence data;The application improves the accuracy of injection mold temperature control.

Description

Technical Field

[0001] This invention relates to the field of data processing technology, and in particular to a method and system for temperature control of injection molds. Background Technology

[0002] Currently, temperature control systems for injection molds generally employ cooling water circulation to control mold temperature. Existing technologies commonly involve zoned control of the injection mold, utilizing multi-channel water systems to regulate the cooling temperature of different areas. These systems typically use temperature-controlled valves and water pumps to control fluid flow and temperature, ensuring the mold temperature remains within a suitable range during the injection molding process, thereby improving the production quality and efficiency of plastic products. Existing temperature control technologies have achieved certain results in practical applications and are widely used in the injection molding production of various plastic products.

[0003] However, in the injection molding process of complex molds, existing technologies suffer from uneven temperature distribution. For example, in certain specially designed injection molds, the temperature control system may not be able to effectively handle temperature differences between different areas of the mold. When the internal structure of the mold is complex or has specially shaped cavities, the speed and temperature control of the cooling water flow often cannot be precisely adjusted, resulting in excessively high or low temperatures in some areas, affecting the molding accuracy of the mold. Taking automotive parts production as an example, due to the complex channel layout within the mold, conventional temperature control systems may lead to inaccurate temperature control in some areas, or even cause uneven cooling on the mold surface, thus affecting the surface quality or dimensional accuracy of the final product and increasing subsequent rework costs. Summary of the Invention

[0004] The purpose of this invention is to provide a method and system for temperature control of injection molds, which aims to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0006] In a first aspect, a method for temperature control of an injection mold, the method comprising:

[0007] Continuous temperature sequence data is collected from each target temperature control area in the injection mold, and the temperature change slope and hysteresis characteristics of each target temperature control area are analyzed based on the temperature sequence data to generate time delay information to represent the temperature response delay.

[0008] Based on the time delay information and the structural geometric parameters of the hysteresis region inside the injection mold, perform hysteresis region feature modeling processing to generate structural response information that describes the heat transfer path and cooling coverage of the hysteresis region;

[0009] Based on the structural response information, a time-series compensation waterway model for the lag region is constructed. Based on the time-series compensation waterway model, the time-series parameters indicating the entry time of the compensation fluid and the flow parameters indicating the compensation flow rate are paired and calculated to generate time-series compensation information for compensation control.

[0010] Based on the timing compensation information, timing trigger control is performed on the entry time of the compensation fluid during the injection molding cycle, so that the compensation fluid enters the lag region earlier or later according to the timing parameters, and execution information is generated to describe the compensation execution status.

[0011] Based on the execution information, the flow distribution of the compensating fluid in the lag region is matched and adjusted to match the flow distribution with the thermal diffusion characteristics corresponding to the time delay information, and updated regional temperature distribution information is generated.

[0012] The continuous temperature sequence data is updated based on the regional temperature distribution information, and the process is repeated cyclically after the update is completed to achieve continuous and precise temperature control in the lag area of ​​the injection mold structure.

[0013] Preferably, based on the analysis of temperature sequence data, the slope and hysteresis characteristics of temperature changes in each target temperature control region are analyzed to generate time delay information representing the temperature response delay, including:

[0014] Based on continuous temperature sequence data, segmented extraction processing is performed on the temperature sequence to extract the temperature change amplitude and change time of each segment, generating rate information to describe the local temperature change rate.

[0015] Based on the rate information, the rate changes between adjacent segments are compared to identify key locations where the temperature change changes from rapid to slow or from slow to delayed. Then, hysteresis trace extraction processing is performed on the key locations to generate hysteresis trace information to describe the delay law of temperature change.

[0016] Based on the hysteresis trace information, the starting time of the change of the hysteresis trace is compared with the expected change time of the target temperature control area, and time offset calculation is performed to generate offset information to characterize the temperature response offset.

[0017] Based on the offset information, stability correction is performed on the changes in offset over multiple injection cycles, and time delay information for modeling is generated by eliminating abnormal offsets.

[0018] Preferably, based on the time delay information and the structural geometric parameters of the hysteresis region inside the injection mold, hysteresis region feature modeling processing is performed to generate structural response information describing the heat transfer path and cooling coverage of the hysteresis region, including:

[0019] Based on the structural geometric parameters, the spatial range of the hysteresis region inside the mold is divided into multiple spatial sub-regions to generate spatial sub-region information for subsequent correlation analysis.

[0020] Based on the spatial sub-region information, feature extraction processing is performed on the contact area, wall thickness difference and cooling water channel layout between each sub-region to generate coupling relationship information to describe the degree of thermal coupling between sub-regions;

[0021] Based on the coupling relationship information and combined with the time delay information, path parsing is performed on the potential transfer direction and speed of heat between different sub-regions to generate thermal path information to describe the heat propagation mode.

[0022] Based on the thermal path information, the cooling response time and thermal diffusion rate of each sub-region within the lag region are compared to generate boundary information for determining the effective cooling range. The thermal path information and boundary information are then correlated to generate structural response information.

[0023] Preferably, a time-series compensated waterway model for the lag region is constructed based on structural response information, including:

[0024] Based on the structural response information, structural mapping processing is performed on the heat transfer path and cooling coverage area within the hysteresis region. The heat transfer path is mapped to the candidate flow path of the compensating fluid, and the cooling coverage area is mapped to the action area on the candidate flow path, generating water channel mapping information to describe the basic structure of the compensating water channel.

[0025] Based on the waterway mapping information, path decomposition processing is performed on the candidate flow path, dividing each candidate flow path into multiple waterway segments with independent transmission characteristics. The path length, structural resistance characteristics and cooling delay characteristics are extracted for each waterway segment to generate waterway segment feature information to describe the transmission behavior of the waterway segments.

[0026] Based on the waterway segment feature information, topological association processing is performed on the connection relationship between each waterway segment to determine the sequential flow relationship of the compensating fluid in different waterway segments, and waterway topology information is generated to represent the overall structure of the compensating waterway.

[0027] Based on the waterway topology and waterway segment characteristics, a time-series compensation waterway model is established to characterize the transmission sequence, transmission time, and cooling range of the compensating fluid in the corresponding waterway in the lag region.

[0028] Preferably, based on the time-series compensation waterway model, the time-series parameters indicating the entry time of the compensation fluid and the flow parameters indicating the compensation flow rate are paired and calculated to generate time-series compensation information for compensation control, including:

[0029] Based on the waterway topology and waterway segment feature information in the time-series compensation waterway model, the process of compensation fluid being sequentially transferred to the lag region along each waterway segment is subjected to transfer time sequence analysis processing to determine the transfer order and corresponding transfer time of compensation fluid in each waterway segment, and generate time-series reference information to describe the time relationship of compensation fluid reaching the lag region.

[0030] Based on the time series reference information and combined with the time delay information, deviation prediction processing is performed on the temperature change trend of the lag region at different time nodes to determine the target time node when the compensation fluid needs to enter the lag region, and initial time series parameters are generated to indicate the entry time of the compensation fluid.

[0031] Based on the waterway section characteristic information and structural response information, the cooling response characteristics of the lag region within the range of the compensating fluid are analyzed to determine the required cooling intensity changes at different compensation stages and generate initial flow parameters to indicate the magnitude of the compensating fluid flow.

[0032] Based on the initial timing parameters and initial flow parameters, parameter association matching processing is performed to match the compensation flow rate with the entry time of different compensation fluids. Association information is generated to characterize the correspondence between the entry time of compensation fluids and the compensation flow rate. The association information is then adjusted according to the transmission characteristics of the waterway section to generate timing compensation information for compensation control.

[0033] Preferably, based on the waterway mapping information, path decomposition processing is performed on the candidate flow paths, dividing each candidate flow path into multiple waterway segments with independent transmission characteristics. Path length, structural resistance features, and cooling delay characteristics are extracted for each waterway segment to generate waterway segment feature information describing the transmission behavior of the waterway segments, including:

[0034] Based on the waterway mapping information, the continuous flow range of the compensating fluid in the candidate flow path is demarcated and identified. The candidate flow path is divided into multiple waterway segments by taking the structural change location and the cooling effect change location in the candidate flow path as the demarcation point.

[0035] Based on the spatial position of each water segment in the injection mold, the actual flow distance of the water segment is extracted to generate path length information that characterizes the flow distance of the compensating fluid in the corresponding water segment.

[0036] Based on the structural geometric features and internal channel morphology of the waterway section, the flow resistance change of the compensating fluid in the waterway section is analyzed by the hindrance characteristic, and structural hindrance characteristic information is generated to characterize the degree of influence of the waterway section on the flow of the compensating fluid.

[0037] Based on the relative positional relationship between the waterway section and the lag area and the cooling coverage, the response time of the compensating fluid generating cooling effect in the waterway section is subjected to delay characteristic extraction processing to generate cooling effect delay characteristic information to characterize the timeliness of the cooling effect of the waterway section.

[0038] Based on path length information, structural resistance characteristics information, and cooling effect delay characteristics information, the transmission behavior of each water segment is comprehensively described, generating water segment characteristic information to describe the transmission behavior of the water segments.

[0039] Preferably, based on the waterway segment characteristic information, topological association processing is performed on the connection relationships between each waterway segment to determine the sequential flow relationship of the compensating fluid between different waterway segments, and waterway topology information representing the overall structure of the compensating waterway is generated, including:

[0040] Based on the waterway segment feature information, the connection relationship identification process is performed on the connection position of each waterway segment in the candidate flow path to determine the direct connection relationship between waterway segments and generate connection relationship information to describe the connection mode of waterway segments.

[0041] Based on the connection relationship information, the flow direction of the compensating fluid between water segments is determined to determine the entry and exit directions of the compensating fluid between adjacent water segments, and directional relationship information is generated to describe the flow direction of the compensating fluid.

[0042] Based on the directional relationship information and waterway segment characteristic information, the sequential analysis process is performed on the flow sequence of the compensating fluid in multiple waterway segments to generate sequential relationship information describing the order in which the compensating fluid passes through the waterway segments.

[0043] Based on the sequence relationship information, topology integration processing is performed on the possible branching or merging of the compensating fluid in different waterway sections to determine the overall flow structure of the compensating fluid in the compensating waterway and generate waterway topology information to represent the overall structure of the compensating waterway.

[0044] Secondly, a temperature control system for an injection mold, the system comprising:

[0045] The temperature acquisition and analysis module is used to acquire continuous temperature sequence data of each target temperature control area in the injection mold, and analyze the temperature change slope and hysteresis characteristics of each target temperature control area based on the temperature sequence data to generate time delay information to represent the temperature response delay.

[0046] The structural modeling module is used to perform hysteresis region feature modeling processing based on time delay information and structural geometric parameters of the hysteresis region inside the injection mold, and generate structural response information to describe the heat transfer path and cooling coverage of the hysteresis region.

[0047] The model building and parameter pairing module is used to build a time-series compensation waterway model for the lag region based on the structural response information. Based on the time-series compensation waterway model, the time-series parameters indicating the entry time of the compensation fluid and the flow parameters indicating the compensation flow rate are paired and calculated to generate time-series compensation information for compensation control.

[0048] The timing trigger control module is used to perform timing trigger control on the entry time of the compensation fluid within the injection cycle according to the timing compensation information, so that the compensation fluid enters the lag region earlier or later according to the timing parameters, and generates execution information to describe the compensation execution status.

[0049] The flow regulation module is used to perform matching regulation processing on the flow distribution of the compensating fluid in the lag region according to the execution information, so that the flow distribution matches the thermal diffusion characteristics corresponding to the time delay information, and generates updated regional temperature distribution information.

[0050] The cyclic update module is used to update the continuous temperature sequence data according to the regional temperature distribution information, and repeats the cyclic execution after the update is completed, so as to achieve continuous and accurate temperature control of the lagging area in the injection mold structure.

[0051] The above-described solution of the present invention has at least the following beneficial effects:

[0052] By collecting continuous temperature sequence data from each target temperature control area in the injection mold and analyzing the slope and hysteresis characteristics of temperature changes, time delay information reflecting the true thermal response state of different areas of the mold can be obtained. This allows the temperature control process to no longer rely solely on a single moment or average temperature, thereby improving the accuracy of identifying temperature change patterns from the source and facilitating the discovery of areas in complex molds prone to thermal hysteresis.

[0053] Based on this, by combining the structural geometric parameters of the hysteresis region inside the injection mold and performing feature modeling on the hysteresis region, the heat transfer path inside the mold and the coverage of the cooling effect can be clearly defined. This transforms temperature control from traditional zoned empirical adjustment to targeted adjustment based on the internal structural characteristics of the mold, which helps to alleviate the problem of uneven temperature distribution in complex structures or special cavity areas.

[0054] Furthermore, by constructing a time-series compensation water circuit model for the lag region and performing pairing calculations on the entry time and flow rate of the compensation fluid based on this model, the compensation cooling behavior can be matched with the actual transmission sequence and transmission time of the compensation fluid in the water circuit. This avoids local overcooling or overheating caused by the lag in the arrival of the cooling medium or unreasonable flow configuration, thereby improving the precision of temperature control.

[0055] Meanwhile, by triggering and controlling the entry time of the compensating fluid based on the timing compensation information during the injection cycle, and adjusting the flow distribution in combination with the execution information, the compensating fluid can form a cooling effect in the lag region that is compatible with the thermal diffusion characteristics of that region. This improves the problem of difficult-to-control local temperature in complex molds and enhances the consistency of the overall temperature distribution of the mold.

[0056] Furthermore, by continuously updating the continuous temperature sequence data based on the updated regional temperature distribution information and repeating the above process, a temperature control closed loop that is continuously corrected with the injection molding cycle can be formed. This allows the temperature control system to adapt to changes in mold conditions and production cycle, maintaining a stable temperature control effect in complex injection molding scenarios. This helps reduce surface quality problems or dimensional deviations of products caused by improper temperature control, and reduces rework and adjustment costs. Attached Figure Description

[0057] Figure 1 This is a flowchart of a temperature control method for injection molds provided in an embodiment of the present invention. Detailed Implementation

[0058] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0059] like Figure 1 As shown, an embodiment of the present invention proposes a method for temperature control of injection molds, the method comprising:

[0060] Continuous temperature sequence data is collected from each target temperature control area in the injection mold, and the temperature change slope and hysteresis characteristics of each target temperature control area are analyzed based on the temperature sequence data to generate time delay information to represent the temperature response delay.

[0061] Based on the time delay information and the structural geometric parameters of the hysteresis region inside the injection mold, perform hysteresis region feature modeling processing to generate structural response information that describes the heat transfer path and cooling coverage of the hysteresis region;

[0062] Based on the structural response information, a time-series compensation waterway model for the lag region is constructed. Based on the time-series compensation waterway model, the time-series parameters indicating the entry time of the compensation fluid and the flow parameters indicating the compensation flow rate are paired and calculated to generate time-series compensation information for compensation control.

[0063] Based on the timing compensation information, timing trigger control is performed on the entry time of the compensation fluid during the injection molding cycle, so that the compensation fluid enters the lag region earlier or later according to the timing parameters, and execution information is generated to describe the compensation execution status.

[0064] Based on the execution information, the flow distribution of the compensating fluid in the lag region is matched and adjusted to match the flow distribution with the thermal diffusion characteristics corresponding to the time delay information, and updated regional temperature distribution information is generated.

[0065] The continuous temperature sequence data is updated based on the regional temperature distribution information, and the process is repeated cyclically after the update is completed to achieve continuous and precise temperature control in the lag area of ​​the injection mold structure.

[0066] In this embodiment of the invention, by collecting continuous temperature sequence data of each target temperature control area in the injection mold and analyzing the slope and hysteresis characteristics of temperature change, time delay information reflecting the thermal response differences of each area of ​​the mold can be obtained, thereby avoiding the judgment bias caused by adjusting only a single point or instantaneous temperature, and enabling the temperature control process to reflect the dynamic thermal behavior of the mold in the actual molding process.

[0067] By combining the time delay information with the structural geometric parameters of the hysteresis region inside the injection mold, feature modeling processing is performed on the hysteresis region to obtain structural response information describing the heat transfer path and cooling coverage within the mold. This allows temperature regulation to move beyond empirically set cooling methods and enable targeted analysis of locations in the mold structure that are prone to heat accumulation or insufficient cooling.

[0068] Based on the obtained structural response information, a time-series compensation water circuit model is constructed. Based on this model, the entry time and flow rate of the compensation fluid are paired and calculated. The compensation behavior can be combined with the actual transmission sequence and transmission time of the compensation fluid in the water circuit, so that the compensation fluid arrives in the lag region at the appropriate time and with the appropriate flow rate, reducing the temperature deviation caused by the lag in the arrival of the cooling medium.

[0069] By controlling the entry time of the compensating fluid according to the timing compensation information during the injection cycle, and adjusting the flow distribution in combination with the execution information, the compensating fluid can form a cooling effect in the lag region that is compatible with the thermal diffusion characteristics of that region, thereby making the temperature change process in the region more stable and helping to maintain the continuity and consistency of the mold temperature state.

[0070] Furthermore, by updating the continuous temperature sequence data based on the updated regional temperature distribution information and repeating the above process, a temperature control closed loop that continuously adjusts with the injection molding cycle can be formed, enabling the temperature control results to be adaptively corrected as the mold conditions and molding cycle change, thus reducing the frequency of manual intervention.

[0071] For example, when producing injection molds for automotive interior parts with multiple cavities and irregular wall thickness distribution, some cavity areas are prone to thermal hysteresis due to their large wall thickness. The above method can be used to analyze the hysteresis characteristics of temperature changes in this area, construct a corresponding time-series compensation water circuit model, and introduce compensation cooling fluid in advance during the injection cycle so that the compensation fluid arrives in the area before the temperature is about to rise. This ensures that the temperature changes in this area are consistent with those in other cavity areas, which is beneficial for obtaining injection molded products with stable dimensions and uniform surface quality.

[0072] In a preferred embodiment of the present invention, based on timing compensation information, timing trigger control is performed on the entry time of the compensation fluid during the injection molding cycle, causing the compensation fluid to enter the lag region earlier or later according to timing parameters, and generating execution information describing the compensation execution state, specifically including:

[0073] During injection molding, based on the current injection cycle time node, the target entry time indicated in the timing compensation information is correlated with the injection cycle start time to determine the actual trigger time of the compensating fluid within this injection cycle. When the injection process reaches the actual trigger time, the compensating fluid passage corresponding to the lag region is opened, allowing the compensating fluid to begin flowing into the lag region. When the injection process has not yet reached the actual trigger time, the compensating fluid passage remains closed, thereby achieving control over the advance or delay of the compensating fluid entry time. After the compensating fluid passage is triggered to open, the opening status, opening duration, and corresponding injection cycle number of the compensating fluid are recorded to form execution information describing the compensating fluid execution process.

[0074] In a preferred embodiment of the present invention, a matching adjustment process is performed on the flow distribution of the compensating fluid in the hysteresis region according to the execution information, so that the flow distribution matches the thermal diffusion characteristics corresponding to the time delay information, and updated regional temperature distribution information is generated, specifically including:

[0075] After the compensating fluid enters the lag region, the current entry time and operational stage of the compensating fluid are determined based on the execution information. Combined with the time delay information corresponding to this lag region, the required cooling intensity trend for this stage is determined. Subsequently, by adjusting the flow regulation device connected to the compensating fluid path, the flow rate of the compensating fluid in the lag region is made to correspond to the required cooling intensity. When the time delay information indicates that the heat diffusion rate in the lag region is slow, the compensating fluid is controlled to maintain a high flow rate; when the heat diffusion rate is fast, the flow rate is controlled to gradually decrease. Through this method, a time-varying flow distribution of the compensating fluid is formed in the lag region, and the temperature changes in the lag region are continuously collected during the adjustment process, thereby generating regional temperature distribution information reflecting the temperature state after compensation.

[0076] In a preferred embodiment of the present invention, continuous temperature sequence data is updated based on regional temperature distribution information, and this process is repeated cyclically after the update is completed, in order to achieve continuous and precise temperature control of the lag region in the injection mold structure, specifically including:

[0077] After completing the compensation control for one injection molding cycle, the acquired regional temperature distribution information is incorporated into the existing continuous temperature sequence data in chronological order to form an updated temperature sequence containing the latest compensation results. Subsequently, the updated temperature sequence is used as input data for the next injection molding cycle to reanalyze the temperature change slope and hysteresis characteristics, and update the corresponding time delay information, structural response information, and timing compensation information accordingly. In subsequent injection molding cycles, the compensation control process is executed again according to the updated compensation parameters, enabling the temperature control process to continuously self-correct as the injection molding conditions and mold thermal state change, achieving continuous control of the temperature state in the hysteresis region.

[0078] In a preferred embodiment of the present invention, temperature change slope and hysteresis characteristics of each target temperature control region are analyzed based on temperature sequence data to generate time delay information representing temperature response delay, including:

[0079] Based on continuous temperature sequence data, segmented extraction processing is performed on the temperature sequence to extract the temperature change amplitude and change time of each segment, generating rate information to describe the local temperature change rate.

[0080] Based on the rate information, the rate changes between adjacent segments are compared to identify key locations where the temperature change changes from rapid to slow or from slow to delayed. Then, hysteresis trace extraction processing is performed on the key locations to generate hysteresis trace information to describe the delay law of temperature change.

[0081] Based on the hysteresis trace information, the starting time of the change of the hysteresis trace is compared with the expected change time of the target temperature control area, and time offset calculation is performed to generate offset information to characterize the temperature response offset.

[0082] Based on the offset information, stability correction is performed on the changes in offset over multiple injection cycles, and time delay information for modeling is generated by eliminating abnormal offsets.

[0083] In this embodiment of the invention, by performing segmented extraction processing on continuous temperature sequence data and combining it with comparative analysis of the temperature change rate between adjacent segments, key locations where the temperature change transitions from rapid to slow or from slow to delayed can be identified, thereby extracting hysteresis trace information reflecting the delay law of temperature change. Furthermore, by comparing the start time of the hysteresis trace change with the expected change time of the target temperature control area and performing stability correction on the offset within multiple injection molding cycles, the impact of instantaneous fluctuations on the judgment results can be reduced, making the obtained time delay information more stable and beneficial for the subsequent temperature control modeling process to characterize the true thermal hysteresis characteristics.

[0084] In a preferred embodiment of the present invention, based on continuous temperature sequence data, a segmented extraction process is performed on the temperature sequence to extract the temperature change amplitude and change time of each segment, generating rate information to describe the local temperature change rate, specifically including:

[0085] During the injection molding process, temperature data of the target temperature control area is continuously acquired at preset sampling time intervals, and the continuously acquired temperature data is arranged in chronological order to form a temperature sequence. Subsequently, the temperature sequence is divided into intervals according to the time span between adjacent sampling time points, so that each segment corresponds to a fixed time interval. Within each segment, the temperature change amplitude between the start and end temperatures of the segment is statistically analyzed, and the corresponding time length of the segment is recorded, thereby forming rate information reflecting the speed of temperature change within the time interval, providing basic data for subsequent temperature change characteristic analysis.

[0086] In a preferred embodiment of the present invention, based on the rate information, the rate changes between adjacent segments are compared to identify key locations where the temperature change changes from rapid to slow or from slow to delayed. Hysteresis trace extraction processing is then performed on these key locations to generate hysteresis trace information describing the delay pattern of the temperature change. Specifically, this includes:

[0087] Following the temporal order of the temperature sequence, the rate information corresponding to adjacent segments is compared one by one. When a significant decrease in rate is detected between adjacent segments, or when the temperature change begins later than the normal response, the boundary position of that segment is identified as a critical position. For the critical position, the temperature change process before and after that position is traced back, and the actual time point at which the temperature began to change and the duration of the change are extracted. The delay performance of this process on the time axis is recorded as hysteresis trace information, which is used to reflect the delay characteristics of the temperature change relative to the ideal change state.

[0088] In a preferred embodiment of the present invention, based on the hysteresis trace information, the starting time of the change in the hysteresis trace is compared with the expected change time of the target temperature control area, and time offset calculation processing is performed to generate offset information for characterizing the temperature response offset, specifically including:

[0089] Based on the extracted hysteresis trace information, the actual time point at which the temperature begins to change is determined, and this time point is compared with the expected change time preset according to injection molding process parameters or historical operating data. By quantifying the difference between the two on the time axis, the degree of time offset reflecting the advance or delay of the temperature response is obtained, and this degree of time offset is recorded as offset information to describe the deviation of the temperature response in the target temperature control area relative to the expected state.

[0090] In a preferred embodiment of the present invention, based on the offset information, a stability correction process is performed on the variation of the offset amount in multiple injection molding cycles. This process generates time delay information for modeling by eliminating abnormal offsets. Specifically, this includes:

[0091] In multiple consecutive injection molding cycles, the corresponding offset information is acquired, and the offset values ​​of each cycle are summarized and analyzed. When the offset value in a certain injection molding cycle is detected to deviate significantly from the offset trend of other cycles, the offset value is identified as an abnormal offset and discarded. Subsequently, the remaining offset values ​​are comprehensively processed to form time delay information that can reflect the stable thermal response characteristics of the target temperature control region. This makes the generated time delay information more consistent with the actual operating state and suitable as input parameters for subsequent structural modeling and compensation control.

[0092] In a preferred embodiment of the present invention, based on the time delay information and the structural geometric parameters of the hysteresis region inside the injection mold, a hysteresis region feature modeling process is performed to generate structural response information describing the heat transfer path and cooling coverage of the hysteresis region, including:

[0093] Based on the structural geometric parameters, the spatial range of the hysteresis region inside the mold is divided into multiple spatial sub-regions to generate spatial sub-region information for subsequent correlation analysis.

[0094] Based on the spatial sub-region information, feature extraction processing is performed on the contact area, wall thickness difference and cooling water channel layout between each sub-region to generate coupling relationship information to describe the degree of thermal coupling between sub-regions;

[0095] Based on the coupling relationship information and combined with the time delay information, path parsing is performed on the potential transfer direction and speed of heat between different sub-regions to generate thermal path information to describe the heat propagation mode.

[0096] Based on the thermal path information, the cooling response time and thermal diffusion rate of each sub-region within the lag region are compared to generate boundary information for determining the effective cooling range. The thermal path information and boundary information are then correlated to generate structural response information.

[0097] In this embodiment of the invention, by combining the structural geometric parameters of the hysteresis region within the injection mold, the internal space of the mold is divided and the thermal coupling relationship between each sub-region is analyzed, thus clarifying the heat transfer mode between different regions. Based on this, by analyzing the potential heat transfer paths between each sub-region and combining the comparison results of cooling response time and heat diffusion rate, the effective coverage range of the cooling effect can be determined. This yields structural response information that reflects the heat transfer path and cooling distribution characteristics within the mold, enabling temperature control analysis to go beyond surface temperature and reflect the influence of the internal structure on temperature changes.

[0098] In a preferred embodiment of the present invention, based on structural geometric parameters, spatial partitioning is performed on the spatial range of the hysteresis region within the mold, dividing the hysteresis region and its neighborhood into multiple spatial sub-regions to generate spatial sub-region information for subsequent correlation analysis, specifically including:

[0099] After determining the specific location of the hysteresis region within the injection mold, the structural geometric parameters of this region and its adjacent regions are obtained, including wall thickness distribution, cavity contour, and the relative positions of cooling channels. Subsequently, with the hysteresis region as the center, the surrounding space is divided into several distinct sub-regions according to a pre-defined spatial division rule, ensuring relative consistency in structural characteristics among each sub-region. This division creates spatial sub-region information describing the structural relationships between the hysteresis region and its neighboring areas, providing a foundation for subsequent heat transfer analysis.

[0100] In a preferred embodiment of the present invention, based on the spatial sub-region information, feature extraction processing is performed on the contact area, wall thickness difference, and cooling water channel layout between each sub-region to generate coupling relationship information describing the degree of thermal coupling between the sub-regions, specifically including:

[0101] For each defined spatial sub-region, the contact interface between adjacent sub-regions is analyzed to obtain their contact area size, and the differences in wall thickness between adjacent sub-regions are compared. Simultaneously, considering the layout of the cooling water channels within the mold, the positional relationship of the cooling water channels relative to each sub-region is determined. By comprehensively considering these structural characteristics, the ease of heat transfer between adjacent sub-regions is assessed, and the assessment results are recorded as coupling relationship information to reflect the strength of thermal coupling between different spatial sub-regions.

[0102] In a preferred embodiment of the present invention, based on coupling relationship information and time delay information, path parsing processing is performed on the potential heat transfer direction and speed between different sub-regions to generate heat path information describing the heat propagation mode, specifically including:

[0103] After obtaining the coupling relationship information between each spatial sub-region, this information is combined with the time delay information corresponding to the target temperature control area for analysis. By comparing the thermal coupling strength and temperature response hysteresis between different sub-regions, it is determined which sub-region is more likely to transfer heat to adjacent sub-regions. Based on the above determination, the possible heat transfer paths between multiple spatial sub-regions are analyzed, and the relative transfer speeds of different transfer paths are estimated, thereby forming thermal path information to describe the way heat propagates inside the mold.

[0104] In a preferred embodiment of the present invention, based on the thermal path information, a corresponding comparison is performed between the cooling response time and the thermal diffusion rate of each sub-region within the hysteresis region to generate boundary information for determining the effective cooling range. The thermal path information and the boundary information are then correlated to generate structural response information, specifically including:

[0105] Based on thermal path information, the temperature change response of each spatial sub-region under cooling is analyzed, and the response time required for a significant temperature change in each sub-region after the start of cooling is determined. Simultaneously, this response time is compared with the rate of heat diffusion within the corresponding sub-region. When the cooling response time effectively covers the heat diffusion process, the sub-region is determined to be within the effective cooling range; otherwise, it is determined to be an area where cooling is difficult to cover. The boundary of the effective cooling range is determined in this way, and the boundary information is comprehensively correlated with the thermal path information to form structural response information that reflects the heat transfer path and cooling coverage characteristics of the lagging region.

[0106] In a preferred embodiment of the present invention, constructing a time-compensated waterway model for the lag region based on structural response information includes:

[0107] Based on the structural response information, structural mapping processing is performed on the heat transfer path and cooling coverage area within the hysteresis region. The heat transfer path is mapped to the candidate flow path of the compensating fluid, and the cooling coverage area is mapped to the action area on the candidate flow path, generating water channel mapping information to describe the basic structure of the compensating water channel.

[0108] Based on the waterway mapping information, path decomposition processing is performed on the candidate flow path, dividing each candidate flow path into multiple waterway segments with independent transmission characteristics. The path length, structural resistance characteristics and cooling delay characteristics are extracted for each waterway segment to generate waterway segment feature information to describe the transmission behavior of the waterway segments.

[0109] Based on the waterway segment feature information, topological association processing is performed on the connection relationship between each waterway segment to determine the sequential flow relationship of the compensating fluid in different waterway segments, and waterway topology information is generated to represent the overall structure of the compensating waterway.

[0110] Based on the waterway topology and waterway segment characteristics, a time-series compensation waterway model is established to characterize the transmission sequence, transmission time, and cooling range of the compensating fluid in the corresponding waterway in the lag region.

[0111] In this embodiment of the invention, by mapping the heat transfer path and cooling coverage area within the hysteresis region to candidate flow paths of the compensating fluid, and decomposing the candidate flow paths, the complex waterway structure can be broken down into waterway segments with independent transfer characteristics. Furthermore, by extracting the path length, structural hindrance characteristics, and cooling delay characteristics of each waterway segment, and performing topological correlation analysis on the connection relationships between the waterway segments, a time-series compensating waterway model reflecting the transfer order and time of the compensating fluid in the waterway can be established, thereby providing a clear structural basis and temporal reference for subsequent compensation control.

[0112] In a preferred embodiment of the present invention, a time-series compensation waterway model is established based on waterway topology information and waterway segment characteristic information to characterize the transmission sequence, transmission time, and cooling range of the compensating fluid in the corresponding waterway in the lag region. Specifically, this includes:

[0113] After obtaining the waterway topology information, all waterway segments are sequentially arranged according to the flow order of the compensating fluid in each segment, forming a waterway sequence structure that reflects the actual flow order of the compensating fluid. Subsequently, combining the path length, structural hindrance characteristics, and cooling delay characteristics of each waterway segment, the transmission time of the compensating fluid in each segment is estimated, and the transmission time of each waterway segment is accumulated according to the flow order to determine the overall transmission time required for the compensating fluid to reach each position in the lag region from the waterway entry point. Furthermore, based on the cooling delay characteristics of each waterway segment, the spatial range in which the compensating fluid can generate effective cooling in the lag region is determined. By integrating the above waterway sequence structure, transmission time information, and cooling range, a time-series compensating waterway model is formed to describe the temporal behavior of the compensating fluid.

[0114] In a preferred embodiment of the present invention, based on a time-compensated waterway model, time-series parameters indicating the entry time of the compensating fluid and flow parameters indicating the compensating flow rate are paired and calculated to generate time-series compensation information for compensation control, including:

[0115] Based on the waterway topology and waterway segment feature information in the time-series compensation waterway model, the process of compensation fluid being sequentially transferred to the lag region along each waterway segment is subjected to transfer time sequence analysis processing to determine the transfer order and corresponding transfer time of compensation fluid in each waterway segment, and generate time-series reference information to describe the time relationship of compensation fluid reaching the lag region.

[0116] Based on the time series reference information and combined with the time delay information, deviation prediction processing is performed on the temperature change trend of the lag region at different time nodes to determine the target time node when the compensation fluid needs to enter the lag region, and initial time series parameters are generated to indicate the entry time of the compensation fluid.

[0117] Based on the waterway section characteristic information and structural response information, the cooling response characteristics of the lag region within the range of the compensating fluid are analyzed to determine the required cooling intensity changes at different compensation stages and generate initial flow parameters to indicate the magnitude of the compensating fluid flow.

[0118] Based on the initial timing parameters and initial flow parameters, parameter association matching processing is performed to match the compensation flow rate with the entry time of different compensation fluids. Association information is generated to characterize the correspondence between the entry time of compensation fluids and the compensation flow rate. The association information is then adjusted according to the transmission characteristics of the waterway section to generate timing compensation information for compensation control.

[0119] In this embodiment of the invention, by analyzing the transmission sequence and time of the compensating fluid in each waterway segment based on a time-series compensation waterway model, and combining this with the temperature change trend in the lag region for prediction, the appropriate time node for the compensating fluid to enter the lag region can be determined. Simultaneously, by analyzing the cooling requirements of the lag region at different compensation stages and generating corresponding flow parameters, a correlation is established between the entry time of the compensating fluid and the flow rate, thereby ensuring that the compensation behavior simultaneously meets the requirements of both time and intensity. This helps to avoid temperature fluctuations caused by compensation that is too early, too late, or mismatched in intensity.

[0120] In a preferred embodiment of the present invention, based on the waterway topology information and waterway segment feature information in the time-series compensation waterway model, the process of compensation fluid being sequentially transferred to the lag region along each waterway segment is subjected to transfer time sequence analysis processing to determine the transfer order and corresponding transfer time of the compensation fluid in each waterway segment, and to generate time-series reference information describing the time relationship of the compensation fluid arriving at the lag region, specifically including:

[0121] Based on a time-series compensated waterway model, the flow sequence of the compensating fluid in each waterway segment is read. Combined with the transmission characteristics of each segment, a time-deployment analysis is performed on the process of the compensating fluid sequentially passing through each segment from its entry into the waterway. By organizing the transmission time of each waterway segment and arranging them according to the waterway topology, the arrival time nodes of the compensating fluid at different waterway segments are obtained, thus forming time-series reference information reflecting the overall transmission time relationship of the compensating fluid.

[0122] In a preferred embodiment of the present invention, based on time series reference information and time delay information, deviation prediction processing is performed on the temperature change trend of the lag region at different time nodes to determine the target time node at which the compensation fluid needs to enter the lag region, and initial time series parameters for indicating the entry time of the compensation fluid are generated, specifically including:

[0123] By comparing the potential arrival times of the compensating fluid in the lag region from the timing reference information with the corresponding time delay information of the lag region, the potential for earlier or later temperature changes in the lag region at different time points is analyzed. When it is predicted that the temperature in the lag region is about to deviate from the expected change state, the corresponding time point is determined as the target time point when the compensating fluid needs to enter the lag region, and this target time point is recorded as the initial timing parameter for subsequent compensation control.

[0124] In a preferred embodiment of the present invention, based on the waterway segment characteristic information and structural response information, demand analysis processing is performed on the cooling response characteristics of the hysteresis region within the range of the compensating fluid to determine the required cooling intensity changes at different compensation stages, and initial flow parameters are generated to indicate the magnitude of the compensating fluid flow rate, specifically including:

[0125] After determining the effective range of the compensating fluid, the temperature change response of the lag region during the compensating fluid action is analyzed by combining the cooling delay characteristics reflected in the water channel feature information and the heat transfer path and cooling coverage described in the structural response information. Based on the temperature change trend of the lag region in different time stages, it is determined whether the required cooling intensity should increase, remain the same, or decrease, and this cooling intensity change requirement is converted into the corresponding compensating fluid flow rate to form the initial flow rate parameters.

[0126] In a preferred embodiment of the present invention, parameter association matching processing is performed based on initial timing parameters and initial flow parameters, so that different compensation fluid entry times correspond to matching compensation flow rates, generating association information characterizing the correspondence between compensation fluid entry times and compensation flow rates. The association information is then adjusted according to the transmission characteristics of the waterway segment to generate timing compensation information for compensation control, specifically including:

[0127] Initial timing parameters are correlated with initial flow parameters, ensuring that each arrival time of the compensating fluid corresponds to a predetermined compensating flow rate, and generating correlation information between the two. Subsequently, this correlation information is modified based on the transmission time and lag characteristics reflected in the waterway segment feature information. When the compensating fluid travels slowly in certain waterway segments, the change in the compensating flow rate is adjusted accordingly, ensuring that the compensation effect takes effect within the expected time in the lag region. Through this correlation and adjustment, timing compensation information is generated to guide the arrival time of the compensating fluid and flow control.

[0128] In a preferred embodiment of the present invention, based on the waterway mapping information, path decomposition processing is performed on the candidate flow paths, dividing each candidate flow path into multiple waterway segments with independent transmission characteristics. Path length, structural resistance features, and cooling delay characteristics are extracted for each waterway segment to generate waterway segment feature information describing the transmission behavior of the waterway segments, including:

[0129] Based on the waterway mapping information, the continuous flow range of the compensating fluid in the candidate flow path is demarcated and identified. The candidate flow path is divided into multiple waterway segments by taking the structural change location and the cooling effect change location in the candidate flow path as the demarcation point.

[0130] Based on the spatial position of each water segment in the injection mold, the actual flow distance of the water segment is extracted to generate path length information that characterizes the flow distance of the compensating fluid in the corresponding water segment.

[0131] Based on the structural geometric features and internal channel morphology of the waterway section, the flow resistance change of the compensating fluid in the waterway section is analyzed by the hindrance characteristic, and structural hindrance characteristic information is generated to characterize the degree of influence of the waterway section on the flow of the compensating fluid.

[0132] Based on the relative positional relationship between the water section and the lag area and the cooling coverage, the response time of the compensating fluid to produce cooling effect in the water section is processed by delay characteristic extraction to generate cooling effect delay characteristic information to characterize the timeliness of the cooling effect of the water section.

[0133] Based on path length information, structural resistance characteristics information, and cooling effect delay characteristics information, the transmission behavior of each water segment is comprehensively described, generating water segment characteristic information to describe the transmission behavior of the water segments.

[0134] In this embodiment of the invention, by performing path decomposition on candidate flow paths and using the locations of structural changes and cooling effect changes as demarcation points, complex flow paths are divided into multiple water channels with independent transmission characteristics. This allows for a more detailed description of the flow behavior of the compensating fluid within the mold. Furthermore, by extracting the path length, structural resistance characteristics, and cooling effect delay characteristics of each water channel segment, the influence of different water channels on the transmission speed and cooling effect of the compensating fluid can be clearly identified. This enables subsequent modeling and control processes to analyze the actual characteristics of different water channels, improving the accuracy of the water channel description.

[0135] In a preferred embodiment of the present invention, based on waterway mapping information, a boundary identification process is performed on the continuous flow range of the compensating fluid in the candidate flow path. Using the locations of structural changes and cooling effect changes in the candidate flow path as boundary points, the candidate flow path is divided into multiple waterway segments, specifically including:

[0136] After obtaining the waterway mapping information describing the basic structure of the compensating waterway, the continuous flow range of the compensating fluid is scanned and analyzed along the extension direction of the candidate flow path to identify structural changes such as pipe diameter changes, bends, and channel cross-sectional shape changes. Simultaneously, combined with cooling coverage information, the locations where the cooling effect of the compensating fluid begins, intensifies, or weakens during flow are identified. Using these structural change locations and cooling effect change locations as dividing points, the candidate flow path is segmented, thus dividing a continuous candidate flow path into multiple waterway segments with significant differences in structural characteristics or cooling effects.

[0137] In a preferred embodiment of the present invention, based on the spatial position of each water segment in the injection mold, path length extraction processing is performed on the actual flow distance of the water segment to generate path length information characterizing the flow distance of the compensating fluid in the corresponding water segment, specifically including:

[0138] After dividing the water channels into segments, the spatial position and extension direction of each segment within the injection mold are obtained. The starting and ending positions of each segment are then located along the actual flow direction of the compensating fluid within that segment. By statistically analyzing the distance of the water channel's spatial trajectory, the actual flow distance the compensating fluid needs to traverse within that segment is obtained and recorded as path length information to reflect the differences in flow distance between different water channels.

[0139] In a preferred embodiment of the present invention, based on the structural geometric features and internal channel morphology corresponding to the waterway section, the flow resistance change of the compensating fluid in the waterway section is analyzed using hindrance characteristic analysis to generate structural hindrance feature information characterizing the degree of influence of the waterway section on the flow of the compensating fluid, specifically including:

[0140] For each waterway segment, its corresponding structural geometry is analyzed, including the channel cross-sectional size, shape variations, and degree of curvature. Simultaneously, considering the surface condition and direction of the internal channels, the degree of flow obstruction that the compensating fluid may encounter when passing through this waterway segment is assessed. Through a comprehensive analysis of the impact of different structural features on flow smoothness, the degree of obstruction to the compensating fluid flow in this waterway segment is determined, and this degree of obstruction is recorded as structural obstruction characteristic information, used to describe the impact of this waterway segment on the transmission velocity of the compensating fluid.

[0141] In a preferred embodiment of the present invention, based on the relative positional relationship between the water passage section and the lag region and the cooling coverage area, a delay characteristic extraction process is performed on the response time of the compensating fluid generating a cooling effect within the water passage section to generate cooling effect delay characteristic information for characterizing the timeliness of the cooling effect of the water passage section, specifically including:

[0142] After clarifying the spatial relationship between the water passage section and the lag region, the time required for the cooling effect of the compensating fluid to begin affecting the lag region as it flows within the water passage section is analyzed. Combining this with information on the cooling coverage area, it is determined whether the cooling effect of the compensating fluid within the water passage section can directly or indirectly affect the lag region, and the time delay from the entry of the compensating fluid into the water passage section to the occurrence of a temperature change in the lag region is determined. This time delay is recorded as cooling effect delay characteristic information to reflect the differences in cooling effectiveness among different water passage sections.

[0143] In a preferred embodiment of the present invention, the transmission behavior of each water segment is comprehensively described based on path length information, structural resistance characteristic information, and cooling effect delay characteristic information, generating water segment characteristic information to describe the transmission behavior of the water segment, specifically including:

[0144] For each waterway segment, the path length, structural resistance characteristics, and cooling delay characteristics are summarized and analyzed. By comprehensively reflecting the flow distance, degree of flow obstruction, and cooling timeliness of the compensating fluid in the waterway segment, a holistic description of the transmission behavior of that segment is formed. This holistic description is recorded as waterway segment characteristic information, enabling subsequent modeling and control processes to analyze and make decisions based on the actual transmission characteristics of different waterway segments.

[0145] In a preferred embodiment of the present invention, based on the waterway segment feature information, topological association processing is performed on the connection relationship between each waterway segment to determine the sequential flow relationship of the compensating fluid between different waterway segments, and waterway topology information representing the overall structure of the compensating waterway is generated, including:

[0146] Based on the waterway segment feature information, the connection relationship identification process is performed on the connection position of each waterway segment in the candidate flow path to determine the direct connection relationship between waterway segments and generate connection relationship information to describe the connection mode of waterway segments.

[0147] Based on the connection relationship information, the flow direction of the compensating fluid between water segments is determined to determine the entry and exit directions of the compensating fluid between adjacent water segments, and directional relationship information is generated to describe the flow direction of the compensating fluid.

[0148] Based on the directional relationship information and waterway segment characteristic information, the sequential analysis process is performed on the flow sequence of the compensating fluid in multiple waterway segments to generate sequential relationship information describing the order in which the compensating fluid passes through the waterway segments.

[0149] Based on the sequence relationship information, topology integration processing is performed on the possible branching or merging of the compensating fluid in different waterway sections to determine the overall flow structure of the compensating fluid in the compensating waterway and generate waterway topology information to represent the overall structure of the compensating waterway.

[0150] In this embodiment of the invention, by determining the connection relationships between waterway segments and the flow direction of the compensating fluid based on the obtained waterway segment characteristic information, and analyzing the sequential flow order of the compensating fluid in multiple waterway segments, the overall flow structure of the compensating fluid in the waterway can be clearly defined. Further integration and analysis of the diversion and confluence situations can generate waterway topology information reflecting the overall structure of the compensating waterway, thus providing a clear structural description of the compensating fluid's transmission path and flow sequence, and offering a reliable topological basis for time-series compensation control.

[0151] In a preferred embodiment of the present invention, based on the waterway segment feature information, connection relationship identification processing is performed on the connection positions of each waterway segment in the candidate flow path to determine the direct connection relationship between waterway segments and generate connection relationship information describing the connection mode of waterway segments, specifically including:

[0152] After obtaining the spatial location and extension direction of each waterway segment, the endpoint positions of adjacent waterway segments are compared along the candidate flow path to determine whether adjacent waterway segments are spatially continuous or interconnected through channel structures. For combinations of waterway segments that can form a continuous flow of compensating fluid, their direct connection relationship is determined, and the connection sequence, connection endpoints, and connection type between each waterway segment are recorded, thereby generating connection relationship information describing the connection mode of the waterway segments.

[0153] In a preferred embodiment of the present invention, based on the connection relationship information, a direction determination process is performed on the flow direction of the compensating fluid between waterway segments to determine the entry and exit directions of the compensating fluid between adjacent waterway segments, generating directional relationship information describing the flow direction of the compensating fluid, specifically including:

[0154] Based on the identified waterway segment connections, and considering the inlet location of the compensating fluid and the overall waterway layout, the flow direction of the compensating fluid at each connection point is analyzed to determine the directional relationship of the compensating fluid entering the downstream waterway segment from the upstream segment. For waterway segments with branch structures, the flow direction of the compensating fluid in different branch directions is determined, and the entry and exit directions between each waterway segment are recorded as directional relationship information to describe the flow direction characteristics of the compensating fluid in the waterway.

[0155] In a preferred embodiment of the present invention, based on directional relationship information and waterway segment characteristic information, a sequence analysis process is performed on the flow sequence of the compensating fluid in multiple waterway segments to generate sequence relationship information describing the order in which the compensating fluid passes through the waterway segments, specifically including:

[0156] After determining the flow direction of the compensating fluid in each waterway segment, the waterway segments are sequentially traversed according to the starting position of the compensating fluid entering the waterway from the inlet, determining the order in which the compensating fluid passes through the waterway segments. In cases where parallel waterway segments exist, the structural resistance characteristics reflected in the waterway segment feature information are used to determine the preferred path of the compensating fluid, and the order of the waterway segments is determined accordingly, thereby generating sequence relationship information describing the flow order of the compensating fluid.

[0157] In a preferred embodiment of the present invention, based on the sequence relationship information, topology integration processing is performed on the possible branching or merging of the compensating fluid in different waterway segments to determine the overall flow structure of the compensating fluid in the compensating waterway, generating waterway topology information representing the overall structure of the compensating waterway, specifically including:

[0158] After obtaining the sequential relationship of the compensating fluid through each waterway segment, waterway segments with multiple downstream or upstream connections are identified to determine whether the compensating fluid splits or merges at that location. For splitting cases, the flow relationship of the compensating fluid in different branch waterway segments is integrated and described; for merging cases, the merging relationship of the compensating fluid from different waterway segments is uniformly represented. Through the comprehensive processing of splitting and merging relationships, waterway topology information reflecting the flow structure of the compensating fluid throughout the entire compensating waterway is formed, supporting subsequent time-series analysis and compensation control.

[0159] Embodiments of the present invention also provide a temperature control system for injection molds, the system comprising:

[0160] The temperature acquisition and analysis module is used to acquire continuous temperature sequence data of each target temperature control area in the injection mold, and analyze the temperature change slope and hysteresis characteristics of each target temperature control area based on the temperature sequence data to generate time delay information to represent the temperature response delay.

[0161] The structural modeling module is used to perform hysteresis region feature modeling processing based on time delay information and structural geometric parameters of the hysteresis region inside the injection mold, and generate structural response information to describe the heat transfer path and cooling coverage of the hysteresis region.

[0162] The model building and parameter pairing module is used to build a time-series compensation waterway model for the lag region based on the structural response information. Based on the time-series compensation waterway model, the time-series parameters indicating the entry time of the compensation fluid and the flow parameters indicating the compensation flow rate are paired and calculated to generate time-series compensation information for compensation control.

[0163] The timing trigger control module is used to perform timing trigger control on the entry time of the compensation fluid within the injection cycle according to the timing compensation information, so that the compensation fluid enters the lag region earlier or later according to the timing parameters, and generates execution information to describe the compensation execution status.

[0164] The flow regulation module is used to perform matching regulation processing on the flow distribution of the compensating fluid in the lag region according to the execution information, so that the flow distribution matches the thermal diffusion characteristics corresponding to the time delay information, and generates updated regional temperature distribution information.

[0165] The cyclic update module is used to update the continuous temperature sequence data according to the regional temperature distribution information, and repeats the cyclic execution after the update is completed, so as to achieve continuous and accurate temperature control of the lagging area in the injection mold structure.

[0166] It should be noted that this system is a system corresponding to the above method. All implementation methods in the above method embodiments are applicable to this embodiment and can achieve the same technical effect.

[0167] Embodiments of the present invention also provide a computing device, including: a processor and a memory storing a computer program, wherein the computer program, when executed by the processor, performs the method described above. All implementations in the above method embodiments are applicable to this embodiment and can achieve the same technical effects.

[0168] Embodiments of the present invention also provide a computer-readable storage medium storing instructions that, when executed on a computer, cause the computer to perform the method described above. All implementations in the above method embodiments are applicable to this embodiment and can achieve the same technical effects.

[0169] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for temperature control of injection molds, characterized in that, The method includes: Continuous temperature sequence data is collected from each target temperature control area in the injection mold, and the temperature change slope and hysteresis characteristics of each target temperature control area are analyzed based on the temperature sequence data to generate time delay information to represent the temperature response delay. Based on the time delay information and the structural geometric parameters of the hysteresis region inside the injection mold, perform hysteresis region feature modeling processing to generate structural response information that describes the heat transfer path and cooling coverage of the hysteresis region; Based on the structural response information, a time-series compensation waterway model for the lag region is constructed. Based on the time-series compensation waterway model, the time-series parameters indicating the entry time of the compensation fluid and the flow parameters indicating the compensation flow rate are paired and calculated to generate time-series compensation information for compensation control. Based on the timing compensation information, timing trigger control is performed on the entry time of the compensation fluid during the injection molding cycle, so that the compensation fluid enters the lag region earlier or later according to the timing parameters, and execution information is generated to describe the compensation execution status. Based on the execution information, the flow distribution of the compensating fluid in the lag region is matched and adjusted to match the flow distribution with the thermal diffusion characteristics corresponding to the time delay information, and updated regional temperature distribution information is generated. The continuous temperature sequence data is updated based on the regional temperature distribution information, and the process is repeated cyclically after the update is completed to achieve continuous and precise temperature control in the lag area of ​​the injection mold structure. Based on the analysis of temperature sequence data, the slope and hysteresis characteristics of temperature changes in each target temperature control region are analyzed to generate time delay information representing the temperature response delay, including: Based on continuous temperature sequence data, segmented extraction processing is performed on the temperature sequence to extract the temperature change amplitude and change time of each segment, generating rate information to describe the local temperature change rate. Based on the rate information, the rate changes between adjacent segments are compared to identify key locations where the temperature change changes from rapid to slow or from slow to delayed. Then, hysteresis trace extraction processing is performed on the key locations to generate hysteresis trace information to describe the delay law of temperature change. Based on the hysteresis trace information, the starting time of the change of the hysteresis trace is compared with the expected change time of the target temperature control area, and time offset calculation is performed to generate offset information to characterize the temperature response offset. Based on the offset information, stability correction is performed on the changes in offset over multiple injection cycles, and time delay information for modeling is generated by eliminating abnormal offsets.

2. The method for temperature control of injection molds according to claim 1, characterized in that, Based on the time delay information and the structural geometric parameters of the hysteresis region inside the injection mold, hysteresis region feature modeling is performed to generate structural response information describing the heat transfer path and cooling coverage of the hysteresis region, including: Based on the structural geometric parameters, the spatial range of the hysteresis region inside the mold is divided into multiple spatial sub-regions to generate spatial sub-region information for subsequent correlation analysis. Based on the spatial sub-region information, feature extraction processing is performed on the contact area, wall thickness difference and cooling water channel layout between each sub-region to generate coupling relationship information to describe the degree of thermal coupling between sub-regions; Based on the coupling relationship information and combined with the time delay information, path parsing is performed on the potential transfer direction and speed of heat between different sub-regions to generate thermal path information to describe the heat propagation mode. Based on the thermal path information, the cooling response time and thermal diffusion rate of each sub-region within the lag region are compared to generate boundary information for determining the effective cooling range. The thermal path information and boundary information are then correlated to generate structural response information.

3. The method for temperature control of an injection mold according to claim 1, characterized in that, Based on the structural response information, a time-series compensated waterway model for the lag region is constructed, including: Based on the structural response information, structural mapping processing is performed on the heat transfer path and cooling coverage area within the hysteresis region. The heat transfer path is mapped to the candidate flow path of the compensating fluid, and the cooling coverage area is mapped to the action area on the candidate flow path, generating water channel mapping information to describe the basic structure of the compensating water channel. Based on the waterway mapping information, path decomposition processing is performed on the candidate flow path, dividing each candidate flow path into multiple waterway segments with independent transmission characteristics. The path length, structural resistance characteristics and cooling delay characteristics are extracted for each waterway segment to generate waterway segment feature information to describe the transmission behavior of the waterway segments. Based on the waterway segment feature information, topological association processing is performed on the connection relationship between each waterway segment to determine the sequential flow relationship of the compensating fluid in different waterway segments, and waterway topology information is generated to represent the overall structure of the compensating waterway. Based on the waterway topology and waterway segment characteristics, a time-series compensation waterway model is established to characterize the transmission sequence, transmission time, and cooling range of the compensating fluid in the corresponding waterway in the lag region.

4. The method for temperature control of an injection mold according to claim 3, characterized in that, Based on the time-series compensation waterway model, the time-series parameters indicating the entry time of the compensation fluid and the flow rate parameters indicating the compensation flow rate are paired and calculated to generate time-series compensation information for compensation control, including: Based on the waterway topology and waterway segment feature information in the time-series compensation waterway model, the process of compensation fluid being sequentially transferred to the lag region along each waterway segment is subjected to transfer time sequence analysis processing to determine the transfer order and corresponding transfer time of compensation fluid in each waterway segment, and generate time-series reference information to describe the time relationship of compensation fluid reaching the lag region. Based on the time series reference information and combined with the time delay information, deviation prediction processing is performed on the temperature change trend of the lag region at different time nodes to determine the target time node when the compensation fluid needs to enter the lag region, and initial time series parameters are generated to indicate the entry time of the compensation fluid. Based on the waterway section characteristic information and structural response information, the cooling response characteristics of the lag region within the range of the compensating fluid are analyzed to determine the required cooling intensity changes at different compensation stages and generate initial flow parameters to indicate the magnitude of the compensating fluid flow. Based on the initial timing parameters and initial flow parameters, parameter association matching processing is performed to match the compensation flow rate with the entry time of different compensation fluids. Association information is generated to characterize the correspondence between the entry time of compensation fluids and the compensation flow rate. The association information is then adjusted according to the transmission characteristics of the waterway section to generate timing compensation information for compensation control.

5. The method for temperature control of an injection mold according to claim 3, characterized in that, Based on the waterway mapping information, path decomposition processing is performed on the candidate flow paths, dividing each candidate flow path into multiple waterway segments with independent transmission characteristics. Path length, structural resistance features, and cooling delay characteristics are extracted for each waterway segment to generate waterway segment feature information describing the transmission behavior of the waterway segments, including: Based on the waterway mapping information, the continuous flow range of the compensating fluid in the candidate flow path is demarcated and identified. The candidate flow path is divided into multiple waterway segments by taking the structural change location and the cooling effect change location in the candidate flow path as the demarcation point. Based on the spatial position of each water segment in the injection mold, the actual flow distance of the water segment is extracted to generate path length information that characterizes the flow distance of the compensating fluid in the corresponding water segment. Based on the structural geometric features and internal channel morphology of the waterway section, the flow resistance change of the compensating fluid in the waterway section is analyzed by the hindrance characteristic, and structural hindrance characteristic information is generated to characterize the degree of influence of the waterway section on the flow of the compensating fluid. Based on the relative positional relationship between the water section and the lag area and the cooling coverage, the response time of the compensating fluid to produce cooling effect in the water section is processed by delay characteristic extraction to generate cooling effect delay characteristic information to characterize the timeliness of the cooling effect of the water section. Based on path length information, structural resistance characteristics information, and cooling effect delay characteristics information, the transmission behavior of each water segment is comprehensively described, generating water segment characteristic information to describe the transmission behavior of the water segments.

6. The method for temperature control of an injection mold according to claim 3, characterized in that, Based on the characteristic information of the waterway segments, topological association processing is performed on the connection relationships between each waterway segment to determine the sequential flow relationship of the compensating fluid in different waterway segments, and waterway topology information representing the overall structure of the compensating waterway is generated, including: Based on the waterway segment feature information, the connection relationship identification process is performed on the connection position of each waterway segment in the candidate flow path to determine the direct connection relationship between waterway segments and generate connection relationship information to describe the connection mode of waterway segments. Based on the connection relationship information, the flow direction of the compensating fluid between water segments is determined to determine the entry and exit directions of the compensating fluid between adjacent water segments, and directional relationship information is generated to describe the flow direction of the compensating fluid. Based on the directional relationship information and waterway segment characteristic information, the sequential analysis process is performed on the flow sequence of the compensating fluid in multiple waterway segments to generate sequential relationship information describing the order in which the compensating fluid passes through the waterway segments. Based on the sequence relationship information, topology integration processing is performed on the possible branching or merging of the compensating fluid in different waterway sections to determine the overall flow structure of the compensating fluid in the compensating waterway and generate waterway topology information to represent the overall structure of the compensating waterway.

7. A temperature control system for injection molds, characterized in that, The system, used in the method of any one of claims 1 to 6, comprises: The temperature acquisition and analysis module is used to acquire continuous temperature sequence data of each target temperature control area in the injection mold, and analyze the temperature change slope and hysteresis characteristics of each target temperature control area based on the temperature sequence data to generate time delay information to represent the temperature response delay. The structural modeling module is used to perform hysteresis region feature modeling processing based on time delay information and structural geometric parameters of the hysteresis region inside the injection mold, and generate structural response information to describe the heat transfer path and cooling coverage of the hysteresis region. The model building and parameter pairing module is used to build a time-series compensation waterway model for the lag region based on the structural response information. Based on the time-series compensation waterway model, the time-series parameters indicating the entry time of the compensation fluid and the flow parameters indicating the compensation flow rate are paired and calculated to generate time-series compensation information for compensation control. The timing trigger control module is used to perform timing trigger control on the entry time of the compensation fluid within the injection cycle according to the timing compensation information, so that the compensation fluid enters the lag region earlier or later according to the timing parameters, and generates execution information to describe the compensation execution status. The flow regulation module is used to perform matching regulation processing on the flow distribution of the compensating fluid in the lag region according to the execution information, so that the flow distribution matches the thermal diffusion characteristics corresponding to the time delay information, and generates updated regional temperature distribution information. The cyclic update module is used to update the continuous temperature sequence data according to the regional temperature distribution information, and repeats the cyclic execution after the update is completed, so as to achieve continuous and accurate temperature control of the lagging area in the injection mold structure.

8. A computing device, characterized in that, include: One or more processors; A storage device for storing one or more programs that, when executed by one or more processors, cause the one or more processors to implement the method as described in any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a program that, when executed by a processor, implements the method as described in any one of claims 1 to 6.

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