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CN-121973414-A - Method for quickly adjusting face difference of injection molding corner window

CN121973414ACN 121973414 ACN121973414 ACN 121973414ACN-121973414-A

Abstract

The invention relates to the field of injection molding, in particular to a method for quickly adjusting the window surface difference of an injection molding corner, which comprises the following steps of a) carrying out positioning reference calibration on a binding molding cavity of an injection mold, wherein the calibration is synchronously started with mold closing action of the mold, and the positioning matching structure containing an elastic compensation piece is used for absorbing mold closing impact deviation. b) The gap compensation adjustment is carried out on the local area of the edge covering forming cavity through the adjustable cavity gap adjustment mechanism, the adjustment mechanism comprises telescopic driving components distributed along the edge of the cavity, each component is connected with a thimble type adjustment execution piece, the method for rapidly adjusting the edge covering window surface difference of injection molding is achieved through real-time detection and dynamic correction, stop adjustment is not needed, the production period is obviously shortened, and the production efficiency is improved. The surface difference precision and the product quality are improved, the surface difference deviation is controlled at the level of 0.001mm by a high-precision calibration, nanoscale compensation and real-time feedback mechanism, and the dimensional consistency and the appearance quality of the corner window are ensured.

Inventors

  • Qiu Rongyu

Assignees

  • 武汉武耀安全玻璃股份有限公司

Dates

Publication Date
20260505
Application Date
20251204

Claims (10)

  1. 1. The method for quickly adjusting the face difference of the injection molding corner window is characterized by comprising the following steps of: a) Performing positioning reference calibration on an edge-covering forming cavity of an injection mold, starting the calibration and mold closing action synchronously, and absorbing mold closing impact deviation through a positioning matching structure containing an elastic compensation piece; b) The gap compensation adjustment is carried out on the local area of the edge covering forming cavity through an adjustable cavity gap adjustment mechanism, the adjustment mechanism comprises telescopic driving components distributed along the edge of the cavity, and each component is connected with a thimble type adjustment executing piece; c) Detecting the surface difference data of the edge covering angle window in real time in the injection molding process, dynamically correcting the cavity gap adjustment amount according to the surface difference data, and avoiding shutdown in the adjustment process; d) Constructing a deviation prediction model based on the history surface difference data, pre-compensating a common deviation area before die assembly, and performing secondary correction by combining real-time detection data after die assembly to realize the cooperation of pre-compensation and dynamic correction; e) And (3) linking the surface difference data with injection molding process parameters, and synchronously adjusting the pressure maintaining pressure and the pressure maintaining time of the corresponding area when the surface difference deviation exceeds a preset threshold value, so that the surface difference is eliminated through the cooperative optimization of the process parameters and the cavity gap.
  2. 2. The method of claim 1, wherein the positioning reference calibration uses a laser interferometer to detect levelness, perpendicularity and flatness of a cavity reference plane, the detected data is compensated by a fine adjustment mechanism after being compared with a CAD model theoretical reference, and the parting surface sealing fit degree is verified after the compensation, and the fine adjustment mechanism comprises a piezoelectric ceramic driving unit, so that displacement compensation with nanometer precision can be realized, and meanwhile, thermal deformation of a die is monitored by a temperature sensor, and real-time temperature correction is carried out on the calibration data.
  3. 3. The method of claim 1, wherein the telescopic driving assembly of the adjustable cavity gap adjusting mechanism performs an adjusting action according to a window angle priority-straight edge linkage time sequence, the window angle area assembly adopts a toggle driving mechanism, the straight edge area adopts a servo motor driving mechanism, each driving assembly is connected with a central controller through a wireless communication module to realize remote monitoring and adjustment, the end part of the adjusting executing piece is provided with an arc-shaped bonding surface, the surface of the adjusting executing piece is covered with a wear-resistant coating, the adjusting executing piece can stretch along the normal direction of the cavity and can be detachably connected with the driving assembly, and meanwhile, a pressure sensor is integrated in the adjusting executing piece and used for feeding back bonding force data in real time to optimize the adjusting amount.
  4. 4. The method according to claim 1, wherein the face difference data is collected by a non-contact detection assembly arranged at a molding outlet of the mold, the detection direction is perpendicular to the molding face and the frequency is synchronous with the molding period, the assembly comprises a 3D laser scanning and visual detection unit and is fused with an infrared thermal imaging sensor to monitor the shrinkage rate of the material, the detection data is processed by an edge extraction and face difference peak value recognition algorithm to generate an instruction signal containing an adjustment area and a deviation direction, and the history detection data is analyzed by a machine learning algorithm to adaptively optimize parameters of the recognition algorithm.
  5. 5. The method of claim 1, wherein after the cavity gap is adjusted, the temperature equalization module is used for carrying out zonal temperature control, the module comprises a plurality of independent temperature control units corresponding to different adjusting areas of the cavity, the temperature is adjusted through a cooling liquid loop and a heat tracing element, and the temperature control units are attached to the outer wall of the cavity to realize the cooperative matching of the temperature control and the gap adjustment, the temperature control units dynamically adapt temperature control parameters based on the surface difference adjustment amount, the area with larger gap adjustment amount correspondingly improves the temperature control precision, the temperature of the surface of the cavity is fed back in real time through a temperature sensor, and the reverse adaptation of temperature fluctuation and gap compensation is ensured.
  6. 6. The method of claim 1, wherein the whole cavity gap adjustment process maintains tightness through an edge sealing type guide structure, the structure comprises a lip sealing ring which is in sliding fit with the outer wall of an adjustment executing piece and is self-adaptively sealed, a telescopic range is limited through a limiting device with a position sensor, an alarm module triggers and locks adjustment actions when the telescopic range is out of range, the sealing structure is further integrated with a self-cleaning function, residual impurities are periodically removed through high-pressure air flow, and sealing durability is ensured.
  7. 7. The method of claim 1, wherein the deviation prediction model adopts time sequence analysis and a neural network algorithm, combines injection molding material characteristics, environmental temperature and humidity data and mold wear history to perform multi-factor fusion prediction, and after the model outputs a precompensation amount, the model simulates an adjustment effect through a digital twin system and is compared with real-time detection data to iteratively optimize model parameters.
  8. 8. The method of claim 1, wherein the linking of the face difference data and the injection molding process parameters is achieved by a multi-objective optimization algorithm, wherein the face difference minimization and the production efficiency maximization are used as objective functions to dynamically adjust the dwell curve, the injection speed and the cooling time, and wherein the process parameter adjustment data is fed back to the deviation prediction model for updating the pre-compensation strategy.
  9. 9. The method of claim 1, further comprising collecting face difference data, adjustment parameters and equipment status information in real time via a cloud platform based on a remote monitoring and diagnosis system of the internet of things, predicting mold maintenance periods and potential faults using big data analysis, and providing a visual interface for an operator to interactively adjust.
  10. 10. The method of claim 1, wherein the adjustable cavity gap adjustment mechanism is integrated with an injection molding machine control system to form a closed loop control circuit, the adjustment actions iterate in real time according to the face difference data, and the adjustment logic supports adaptive learning of multiple mold versions, enabling automatic switching of adjustment strategies according to different product models.

Description

Method for quickly adjusting face difference of injection molding corner window Technical Field The invention relates to the field of injection molding, in particular to a method for quickly adjusting the difference of the edge window surface of an injection molding bag. Background In the industries of automobiles, household appliances and the like, angular windows with edge wrapping structures are increasingly widely applied. Such components are typically formed by an injection molding and taping process, i.e. placing a glass insert into a mold cavity, and injecting molten plastic into the glass to form a clad frame at the glass edges. In this process, "face difference" is a key quality indicator that refers to the difference in height between the glass surface and the surface of the peripheral plastic cladding frame. Accurate face difference control is important to guaranteeing assembly accuracy of parts, air tightness of the whole automobile, appearance attractiveness and NVH performance. However, the prior art has a number of significant disadvantages in controlling the face difference of injection molded corner windows, particularly in corner window areas where the geometry is complex and stresses are easily concentrated: 1. The mold debugging period is long, and the traditional method mainly depends on repeated mold testing and manual debugging after the mold is manufactured. The technician needs to manually repair, pad or partially repair and weld the die cavity by experience according to the surface difference measurement result of the test piece. The process is time-consuming and labor-consuming, the precision is difficult to guarantee, repeated cyclic adjustment is often needed, and the new product production progress is seriously dragged and slowed down. 2. The adjustment process is discontinuous, the production efficiency is low, and most of the prior art schemes cannot be adjusted on line when the surface difference is unqualified in the production process. The mould must be stopped and removed before maintenance or adjustment can be performed on the mould. The discontinuous adjustment mode breaks continuous production beats, so that the equipment utilization rate is reduced, the production cost is increased, and the production requirements of modernization, high efficiency and flexibility are difficult to adapt. 3. Lack of predictive and active compensation capabilities the existing control methods are mostly passive tuning of the "detect-react" type. They cannot be predicted and intervened before the defect occurs. Due to the influences of factors such as material shrinkage, mold thermal deformation, abrasion and the like in the injection molding process, the face difference deviation has certain regularity and predictability, but the traditional technology lacks the capability of constructing a prediction model by utilizing historical data and real-time data, cannot realize pre-compensation before mold closing, and is always lagged behind the quality problem. Therefore, it is necessary to provide a method for rapidly adjusting the window surface difference of the injection molding edge covering angle to solve the above technical problems. Disclosure of Invention In order to solve the technical problems, the invention provides a method for quickly adjusting the window face difference of an injection molding corner. The invention provides a method for quickly adjusting the window surface difference of an injection molding corner, which comprises the following steps: a) Performing positioning reference calibration on an edge-covering forming cavity of an injection mold, starting the calibration and mold closing action synchronously, and absorbing mold closing impact deviation through a positioning matching structure containing an elastic compensation piece; b) The gap compensation adjustment is carried out on the local area of the edge covering forming cavity through an adjustable cavity gap adjustment mechanism, the adjustment mechanism comprises telescopic driving components distributed along the edge of the cavity, and each component is connected with a thimble type adjustment executing piece; c) Detecting the surface difference data of the edge covering angle window in real time in the injection molding process, dynamically correcting the cavity gap adjustment amount according to the surface difference data, and avoiding shutdown in the adjustment process; d) Constructing a deviation prediction model based on the history surface difference data, pre-compensating a common deviation area before die assembly, and performing secondary correction by combining real-time detection data after die assembly to realize the cooperation of pre-compensation and dynamic correction; e) And (3) linking the surface difference data with injection molding process parameters, and synchronously adjusting the pressure maintaining pressure and the pressure maintaining time of the corresponding area when the surfac