WO2024251703A1 - VERFAHREN ZUM BETRIEB EINER SPRITZGIEßMASCHINE, SPRITZGIEßMASCHINE UND COMPUTERPROGRAMMPRODUKT - Google Patents
VERFAHREN ZUM BETRIEB EINER SPRITZGIEßMASCHINE, SPRITZGIEßMASCHINE UND COMPUTERPROGRAMMPRODUKT Download PDFInfo
- Publication number
- WO2024251703A1 WO2024251703A1 PCT/EP2024/065269 EP2024065269W WO2024251703A1 WO 2024251703 A1 WO2024251703 A1 WO 2024251703A1 EP 2024065269 W EP2024065269 W EP 2024065269W WO 2024251703 A1 WO2024251703 A1 WO 2024251703A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- injection molding
- injection
- training
- check valve
- molding machine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
- B29C45/50—Axially movable screw
- B29C45/52—Non-return devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
- B29C45/766—Measuring, controlling or regulating the setting or resetting of moulding conditions, e.g. before starting a cycle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
- B29C45/768—Detecting defective moulding conditions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
- B29C45/77—Measuring, controlling or regulating of velocity or pressure of moulding material
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06N—COMPUTING ARRANGEMENTS BASED ON SPECIFIC COMPUTATIONAL MODELS
- G06N20/00—Machine learning
- G06N20/10—Machine learning using kernel methods, e.g. support vector machines [SVM]
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06N—COMPUTING ARRANGEMENTS BASED ON SPECIFIC COMPUTATIONAL MODELS
- G06N3/00—Computing arrangements based on biological models
- G06N3/02—Neural networks
- G06N3/08—Learning methods
- G06N3/09—Supervised learning
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06N—COMPUTING ARRANGEMENTS BASED ON SPECIFIC COMPUTATIONAL MODELS
- G06N5/00—Computing arrangements using knowledge-based models
- G06N5/01—Dynamic search techniques; Heuristics; Dynamic trees; Branch-and-bound
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76003—Measured parameter
- B29C2945/7602—Torque
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76177—Location of measurement
- B29C2945/7618—Injection unit
- B29C2945/76187—Injection unit screw
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76177—Location of measurement
- B29C2945/7618—Injection unit
- B29C2945/76214—Injection unit drive means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76344—Phase or stage of measurement
- B29C2945/76384—Holding, dwelling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76494—Controlled parameter
- B29C2945/76498—Pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76929—Controlling method
- B29C2945/76979—Using a neural network
Definitions
- the present invention relates to a method for operating an injection molding machine and to an injection molding machine.
- the present invention also relates to a computer program product for controlling and/or monitoring an injection molding machine.
- the material to be injected is plasticized and conveyed by a rotating plasticizing screw towards the nozzle of the plasticizing unit and dosed there.
- the plasticized material obtained in the dosing process is injected into the injection mold via the nozzle by means of an axial feed movement of the plasticizing screw.
- pressure is maintained to compensate for shrinkage of the material due to its cooling in the tool.
- non-return valves are used in the area of the screw tip.
- the non-return valve is open to enable the plasticized material to be dosed.
- the non-return valve must be reliably closed in order to ensure reproducible process properties and thus the desired properties of the parts to be produced.
- leakage Depending on when the non-return valve is closed, more or less material flows back along the plasticizing screw, which is referred to as leakage.
- This object is achieved by a method for operating an injection molding machine according to claim 1 and an injection molding machine according to claim 13.
- the object is also achieved by a computer program for monitoring and/or controlling an injection molding machine according to claim 14.
- the injection molding machine to be operated according to the method has a plasticizing screw with a check valve to prevent a backflow of plasticized material during an injection process. At least one injection process is carried out, wherein at least one course of a variable characteristic of the injection process is recorded. The at least one recorded course of the at least one variable characteristic of the injection process is evaluated by means of an evaluation algorithm trained by machine learning to determine the closing behavior of the check valve of the plasticizing screw.
- the core of the method lies in the use of the evaluation algorithm trained by means of machine learning, preferably by means of supervised machine learning.
- This enables a data-driven evaluation of the at least one course of the variable characteristic of the injection process.
- the machine learning makes it possible to determine the closing behavior from the at least one course without a specific evaluation routine being specified, for example without the evaluation algorithm being dependent on the existence and evaluation of a local maximum.
- the at least one course can be evaluated independently of its individual properties, in particular, independently of the existence of local maxima, and a respective closing behavior of the check valve can be assigned. This allows a reliable determination of the closing behavior even in the case of atypical courses of at least one variable characteristic of the injection process.
- a particular advantage of the method is that several courses of different variables characteristic of the injection process can be evaluated using the evaluation algorithm. This allows a particularly precise determination of the closing behavior.
- the evaluation is not limited to certain variables and/or their typical properties or course, for example local minima and/or maxima.
- the recorded course is to be understood in particular as a temporal course of the at least one variable characteristic of the injection process during the injection process.
- the at least one course is recorded at least for the duration of the injection process.
- the at least one course can also be recorded beyond the injection process, for example over at least parts of the holding pressure process.
- the at least one recorded curve can be evaluated using the evaluation algorithm, for example using pattern recognition or image recognition methods.
- the at least one recorded curve can be evaluated directly.
- Suitable features include, among others, integrals, differentials, minima, maxima, median, standard deviation, entropy, sample entropy, longest time period above and/or below the average and/or one or more quantiles.
- several features of the at least one curve in particular several features of several curves of different characteristic sizes, are used for the evaluation.
- the evaluation algorithm may comprise suitable forms of machine learning, in particular supervised machine learning.
- the evaluation algorithm may in particular comprise one or more artificial neural networks, in particular one or more deep Neural Networks (DNN), and/or one or more suitable ensemble methods, in particular Random Forest and/or Gradient Boosted Tree, and/or one or more Support Vector Machines (SVM).
- DNN deep Neural Networks
- SVM Support Vector Machines
- the evaluation algorithm can in particular have a classifier, for example in the form of a suitable neural network and/or suitable ensemble methods (for example Random Forest or Gradient Boosted Tree) and/or a Support Vector Machine, for classifying the closing behavior into several categories.
- suitable neural network and/or suitable ensemble methods for example Random Forest or Gradient Boosted Tree
- Support Vector Machine for classifying the closing behavior into several categories.
- the closing behavior is in particular a qualitative and/or quantitative measure for the closing of the check valve.
- the closing behavior indicates, for example, whether and/or to what extent the check valve is closed.
- the closing behavior indicates in particular at which point in time during the injection process and/or at which axial position of the injection path of the plasticizing screw the check valve is closed, in particular completely.
- the closing behavior is a variable assigned to the respective injection process.
- the closing behavior is determined, for example, independently of other properties of the plasticizing unit, the plasticizing screw and/or the check valve, in particular the state of wear of the check valve.
- the closing behavior can be and/or be determined independently of properties of the material to be processed and related process parameters. In particular, the closing behavior can be determined independently of a process temperature.
- the evaluation algorithm is trained in particular to assign the at least one determined course of the at least one variable characteristic of the injection process to different closing behaviors, for example by classifying the closing behavior into two or more categories. Possible categories can, for example, cover one or more of the following case groups: check valve closed, not closed, not completely closed, . . .). Additionally or alternatively, the determination of the closing behavior can include the determination of further characteristic parameters, in particular a closing time and/or a non-return valve efficiency. The non-return valve efficiency can, for example, quantify which portion of the injection path and/or which portion of the injection time is covered with the non-return valve closed.
- closing time and the non-return valve efficiency can be determined in particular via one or more suitable regression algorithms of the evaluation algorithm.
- the material plasticized in the dosing process is in particular a plastic material.
- the plasticized material is, for example, in a state similar to a melt.
- the plasticized material is also referred to here and below as a melt, in particular as a plastic melt.
- the at least one variable characteristic of the injection process comprises one or more of the following variables: injection pressure, injection speed, position of the plasticizing screw, torque of a rotary drive of the plasticizing screw, rotation speed of the plasticizing screw and/or drive torque of a linear drive of the plasticizing screw.
- the rotation drive of the plasticizing screw is in particular an electric drive.
- the rotation drive is used in particular to drive the plasticizing screw in rotation during the dosing process and is also referred to as the dosing drive.
- an angular position of the plasticizing screw can be held, for example, by means of position control.
- the rotation drive can, for example, apply a holding force to the plasticizing screw, for example to prevent rotation due to backflowing melt.
- the torque of the rotation drive is also referred to as the dosing torque.
- the torque of the rotation drive is in particular the torque required to hold the plasticizing screw required holding torque. The torque can be measured, for example, using a torque sensor on the rotary drive.
- the linear drive of the plasticizing screw which is also called the injection drive, is preferably an electric drive. It can, for example, have an electric motor and a gear for converting the rotary motion into the linear motion, for example a ball screw drive.
- the drive torque of the linear drive can, for example, be measured as the torque of the electric motor.
- the drive torque of the linear drive is also called the injection torque, in particular the injection torque.
- the drive torque can, for example, be measured using a torque sensor on the linear drive.
- the injection pressure is the pressure with which the plastic melt is injected into the tool by the axial movement of the plasticizing screw.
- the injection pressure can be detected, for example, by a pressure sensor on the plasticizing screw, particularly in the area of the end facing away from the nozzle.
- the position of the plasticizing screw is also referred to as the screw position.
- the position of the plasticizing screw is in particular its axial position.
- the axial position of the plasticizing screw changes during the injection process due to the feed movement required for this.
- the axial position of the plasticizing screw can be recorded, for example, using a displacement sensor.
- the injection speed is the axial speed of the plasticizing screw, especially during the injection process and the holding pressure process.
- the injection speed can be used as a control variable during the injection process.
- the course of the injection speed during the holding pressure phase is particularly relevant for evaluating the closing behavior of the check valve.
- the injection speed can be determined, for example, as a change in the axial position using a position measuring sensor. In the case of speed control, especially during the injection process, the injection speed can also be read out as a control variable.
- the rotation speed of the plasticizing screw also known as screw rotation, is the rotary speed of the plasticizing screw. During the dosing process, this is a controlled variable.
- the course of the rotation speed during the injection phase is particularly relevant for evaluating the closing behavior of the check valve.
- the rotation speed of the plasticizing screw can be determined, for example, via a rotation of the rotary drive.
- At least two, in particular at least three, of the variables characteristic of the injection process are evaluated using the evaluation algorithm.
- the evaluation is particularly precise and is not restricted to the use of individual variables and their respective properties.
- the use of the torque of the rotary drive, the injection pressure and the, in particular axial, position of the plasticizing screw has proven to be particularly suitable.
- the torque of the rotary drive, the injection pressure, the, in particular axial, position of the plasticizing screw and the, in particular axial, speed of the plasticizing screw are used in the evaluation.
- At least the injection pressure, the, in particular axial position of the plasticizing screw, the torque of the rotary drive, the rotational speed of the plasticizing screw, the drive torque of the translational drive, in particular the torque of the electric motor of the translational drive, and the injection speed are used in the evaluation.
- At least one, preferably several, features can be extracted from the courses of the respective variables for the evaluation.
- process variables to be evaluated in particular the variables characteristic of the injection process to be evaluated, as well as their evaluation, in particular the extracted features, enable conclusions to be drawn about the closing behavior of the check valve, in particular the closing time and/or the non-return valve efficiency, regardless of other properties of the injection molding machine.
- the method can be used on several machines, in particular different machines, and/or for different process parameters, in particular regardless of the materials to be processed and/or process temperatures.
- the method, in particular the process variables and/or extracted features used for the evaluation can in particular be standardized.
- the evaluation algorithm classifies the closing behavior of the check valve into two or more categories.
- the classification can be used to make simple and precise statements about the correct closing behavior.
- error states such as the check valve not closing, can be precisely determined.
- possible faulty production batches can be identified at an early stage and, if necessary after further investigation, sorted out. Unnecessary waste is avoided.
- the classification is carried out into at least two categories “check valve closed” and “check valve not closed”.
- the at least two categories may additionally include at least one of the subcategories “check valve not completely closed”, “check valve closed in time” and/or “check valve closed too late”.
- the evaluation algorithm determines a closing time of the check valve and/or a non-return valve efficiency from the at least one course of the at least one variable characteristic of the injection process.
- the closing time and/or the non-return valve efficiency can be determined, for example, using one or more suitable regression algorithms.
- the knowledge the closing time and/or the non-return valve efficiency enables particularly practice-relevant statements about the closing behavior. In particular, it is possible to detect if the check valve closes too late.
- conclusions can be drawn about a leakage volume, for example in order to adapt further processes of the same or subsequent injection molding cycles to this.
- the evaluation algorithm determines at least one non-return valve efficiency of the check valve from the at least one course of the at least one variable characteristic of the injection process, wherein the non-return valve efficiency quantifies which portion of an injection path and/or which portion of an injection time of the injection process was covered with the check valve closed.
- the closing time and/or the non-return valve efficiency can be determined in particular in the form of a probability analysis. With the help of the evaluation algorithm, for example, a most probable closing time can be determined. Depending on the probability distribution, a validity and/or a possible error range of the determined closing time can also be determined. The most probable non-return valve efficiency can be deduced from the most probable closing time.
- the at least one recorded curve of the at least one variable characteristic of the injection process is standardized and/or smoothed for evaluation using the evaluation algorithm.
- This enables simpler evaluation using the evaluation algorithm.
- the smoothing and/or standardization allows the extraction of comparable features for corresponding curves.
- the closing behavior of the check valve can be determined reliably and precisely regardless of the absolute values in the process. In particular, the consideration of absolute values is not necessary. The determination of the closing behavior is not impaired by outliers in the measured values.
- the at least one recorded curve is standardized for evaluation. This allows good comparability of the recorded curves, in particular for classification, regardless of the respective absolute values. Smoothing can be carried out optionally, for example in the case of very noisy signals.
- further processes of the respective injection molding cycle are adapted depending on the closing behavior determined by the evaluation algorithm.
- the pressure and/or duration of a holding pressure process can be adjusted in order to take into account different leakages due to different closing times of the check valve.
- the method allows adaptive process adjustment.
- the pressure and/or duration of a holding pressure process of the respective injection molding cycle is adjusted. This enables particularly precise process adjustment, in particular to compensate for different leaks due to different closing times of the check valve.
- the setting parameters of subsequent injection molding cycles in particular the dosing and/or injection process, can be adapted to improve the closing behavior of the check valve, in particular a closing time and/or a non-return valve efficiency of the check valve.
- the closing behavior can thereby be optimized, in particular iteratively.
- the closing behavior is determined for several injection molding cycles, in particular for all injection molding cycles. This allows essentially seamless monitoring and early detection of possible error states and their potential influence on the parts to be manufactured. Particularly preferred is to compare the determined closing behavior with a target value and/or with predetermined closing behavior.
- a temporal progression of the closing behavior and/or one or more parameters related thereto are determined over several injection molding cycles. From the progression of the closing behavior, for example, a trend can be determined as to the extent to which the closing behavior changes. This enables the condition of the injection molding machine to be monitored, for example monitoring a successive change in the closing time, the non-return valve efficiency, superimposed changes in the injection pressure and/or the injection speed.
- the evaluation algorithm is trained using training data from at least one training injection molding machine, the training injection molding machine having at least one sensor for detecting at least one course of the at least one variable characteristic of the injection process for several training injection molding cycles to generate the training data, and the training injection molding machine having an additional training sensor that at least indirectly measures the closing behavior of the check valve in the respective training injection molding cycle, measurement data from the training sensor being used for, in particular, automatic labeling of the training data.
- the closing behavior of the check valve can be clearly determined using the measurement data from the training sensor. This knowledge enables the training data to be easily labeled, in particular with regard to the closing state at the end of the injection process (fully closed, not closed, . . .
- the closing times, the non-return valve efficiency and/or other parameters that allow conclusions to be drawn about the closing behavior of the check valve By training with the training data labelled in this way, the knowledge gained with the help of the training sensor can be used in the injection moulding machine without the need for additional training. ning sensor is required. When operating the injection molding machine, especially a series machine, measurement data from the training sensor, if available at all, do not need to be taken into account for the evaluation.
- training data sets are generated, whereby the training data sets each contain the training data corresponding to the respective quantities characteristic of the injection process and the label determined with the help of the training sensor.
- the measurement data of the training sensor can, for example, be a time profile of a variable measured by the training sensor.
- the training sensor is arranged in particular in the area of the check valve, in particular behind the check valve in the plasticizing cylinder.
- the training sensor can have an ultrasonic sensor and/or a pressure sensor that is positioned behind the check valve in order to measure a state of the melt, in particular a melt pressure, behind the check valve.
- the closing behavior of the check valve can be directly deduced from the state of the melt behind the check valve.
- the training sensor of the training injection molding machine is a pressure sensor arranged behind the check valve for measuring the melt pressure behind the check valve.
- Measuring the melt pressure behind the check valve has proven to be particularly suitable for at least indirectly measuring the closing behavior of the check valve.
- the material flowing behind the check valve increases the melt pressure. When the check valve closes, the melt pressure decreases.
- the closing behavior can therefore be clearly determined by the start of an abrupt drop in the melt pressure behind the check valve.
- the measurement behind the check valve is not influenced by other process states, so that the abrupt drop in the melt pressure is pronounced when the check valve closes. Atypical courses, in particular without the existence of an abrupt drop in the melt pressure despite the check valve closing, do not occur in particular.
- the injection molding machine being operated does not have the training sensor.
- the closing behavior of the check valve is determined solely on the basis of the variables characteristic of the injection process. Sensors that at least indirectly measure the closing behavior of the check valve are expensive and require a lot of maintenance.
- the training sensor is preferably dispensed with, which reduces the set-up and maintenance effort.
- the training injection molding machine is particularly preferably designed to be essentially the same as the injection molding machine to be operated, with the exception of the additional training sensor.
- the specific closing behavior in particular a determined category, a closing time and/or a non-return valve efficiency
- the injection molding machine can have an output unit for this purpose, for example in the form of a screen.
- measures can also be displayed that are derived from the specific closing behavior and are displayed to the operator for information and/or implementation by the operator.
- the injection molding machine has a plasticizing screw with a check valve to prevent backflow of plasticized material during an injection process, at least one sensor for detecting at least one course, at least one variable characteristic of the injection process, and a control unit.
- the control unit is designed to evaluate the at least one detected course of the at least one variable characteristic of the injection process using an evaluation algorithm trained by machine learning to determine a closing behavior of the check valve.
- the injection molding machine has in particular a clamping unit and a plasticizing unit, which may be known per se.
- the plasticizing unit may have a rotary sion drive for driving the plasticizing screw in rotation, in particular during a dosing process.
- the plasticizing unit can also have a translation drive for driving the plasticizing screw in translation, for example for its axial displacement during the injection process.
- the control unit controls in particular the injection process, preferably the complete injection molding cycle.
- the control unit is used in particular to monitor the closing behavior of the check valve.
- the control unit has in particular a data memory, a main memory and a processor for storing and executing the evaluation algorithm.
- the evaluation algorithm can, for example, be stored in a data memory of the control unit and loaded into the main memory and processor for execution.
- the at least one sensor comprises in particular a pressure sensor for detecting an injection pressure, a displacement sensor for detecting a particular axial screw position and/or injection speed, a torque sensor for detecting a torque of a rotary drive of the plasticizing screw and/or a sensor for detecting a drive torque of the linear drive of the plasticizing screw, in particular a torque sensor for detecting a torque of an electric motor of the linear drive.
- the injection molding machine preferably comprises several, in particular all, of the aforementioned sensors.
- the computer program product according to the invention for controlling and/or monitoring an injection molding machine has commands which, when the program is executed by a computer, cause the computer to execute an evaluation algorithm trained using machine learning methods to determine a closing behavior of a check valve of a plasticizing screw of an injection molding machine based on an evaluation of at least one course of at least one variable characteristic of an injection process.
- the computer program product can be executed in particular by means of a control unit of the injection molding machine.
- the computer program product has the advantages described in relation to the method.
- the computer program product can advantageously be designed to implement further of the optional method features described above.
- the computer program can be designed to control and/or read one or more sensors of the injection molding machine to record the at least one course to be evaluated.
- the computer program product is stored in particular on computer-readable data storage devices, in particular data storage devices that can be connected to a computer, for example in the form of a control unit of the injection molding machine, and/or can be used in these.
- the computer program product can comprise the data storage device.
- the computer program product can also be stored on a data storage device of a computer, in particular a control unit of the injection molding machine. Commands of the computer program product can be loaded into a processing unit of the computer, for example into a processor of the control unit, for execution.
- the evaluation algorithm is trained using training data from at least one training injection molding machine, the training injection molding machine having at least one sensor for detecting at least one course of at least one variable characteristic of an injection process for several training injection molding cycles for generating training data, and the training injection molding machine having an additional training sensor that at least indirectly measures the closing behavior of the check valve in the respective training injection molding cycle, measurement data from the training sensor being used for, in particular, automatic, labeling of the training data.
- the advantages and optional features of training the evaluation algorithm, in particular with regard to generating the training data correspond to the advantages or optional features described in relation to the method.
- Fig. 1 shows schematically an injection molding machine, with only the components of the injection molding machine essential to the invention being shown
- Fig. 2A - 2C schematically show time courses of various parameters characteristic of the injection process for different injection processes, which are evaluated to determine a closing behavior of a check valve of the plasticizing screw by means of an evaluation algorithm trained by machine learning
- Fig. 3 schematically shows a training injection molding machine for generating training data for training the evaluation algorithm, wherein the training injection molding machine has a training sensor which measures at least a direct closing behavior of the check valve, and
- Fig. 4A - 4C schematically show time courses of measured values of the training sensor of the training injection molding machine in Fig. 3 for the exemplary injection processes shown in Figs. 2A to 2C.
- Fig. 1 shows a schematic diagram of an injection molding machine 1.
- the injection molding machine 1 has a plasticizing unit 2.
- the plasticizing unit 2 can be moved to a fixed clamping plate 4 of a clamping unit (not shown) using a starting cylinder 3.
- the injection molding machine 1 has a control unit 5 for controlling the operation of the injection molding machine 1.
- the control unit 5 is in data communication with machine parts of the injection molding machine 1 via a data connection 6 for controlling the machine parts and/or for reading data from the machine parts, for example for reading sensors.
- Other components of the injection molding machine 1 are not shown for the sake of clarity.
- the plasticizing unit 2 has a plasticizing cylinder 7, a nozzle 8 and a plasticizing screw 9 that can be driven in a rotational and translational manner within the plasticizing cylinder 7.
- a rotary drive 10 is used to drive the plasticizing screw 9 in rotation.
- the rotary drive 10 is an electric drive.
- the plasticizing screw 9 can be driven in translation with the aid of a translation drive 11.
- the translation drive 11 has an electric motor, the rotary movement of which is converted via a ball screw drive 12 into a translational movement for driving the plasticizing screw 9 in translation.
- Plastic granulate 14 is fed into the plasticizing cylinder 7 via a filling funnel 13.
- the plastic granulate 14 is conveyed towards the nozzle 8 with the aid of the rotationally driven plasticizing screw 9 and is plasticized in the process.
- the plastic material is heated and melted via heating bands 15. The temperature is monitored by means of thermal sensors 16.
- the rotary drive 10 is active to drive the plasticizing screw 9. The dosing process continues until a predetermined amount of plastic melt 17 is dosed between the screw tip 18 of the plasticizing screw 9 and the nozzle 8.
- an injection process takes place.
- the plasticizing unit 2 is moved to the clamping plate 4 using the start-up cylinder 3.
- the plastic melt 17 is injected into the injection molding tool (not shown) via the nozzle 8 by an axial feed movement of the plasticizing screw 9.
- the feed movement of the plasticizing screw 9 takes place over an injection path or injection time.
- the plasticizing screw 9 is moved axially using the translation drive 11.
- the axial movement of the plasticizing screw 9 is speed-controlled, for example.
- the rotary drive 10 is passive and exerts a holding force to prevent the plasticizing screw 9 from rotating.
- the injection process is followed by a holding pressure process.
- pressure is maintained by means of a pressure control of the plasticizing screw 9 in order to compensate for shrinkage of the plastic material cooling down in the injection mold.
- the holding pressure process usually lasts until the so-called sealing point.
- the basic procedure for operating the injection molding machine 1 described above requires that the plastic melt can reach the front of the plasticizing screw 9 during the metering process.
- the plastic melt should not flow back along the plasticizing screw 9.
- a known non-return valve 20 is arranged in the area of the tip 18.
- the non-return valve 20 is designed as a check valve.
- the check valve opens due to the pressure of the plastic melt conveyed in the direction of the nozzle 8 during the metering process.
- a pressure difference arises between the plastic melt 17 in front of the check valve 20 and in areas behind the check valve 20, so that the check valve is pressed against the webs 21 of the plasticizing screw 9 and thus closes.
- the non-return valve 20 designed as a check valve is structurally simple and does not require any separate control.
- the disadvantage is that the closing behavior of the check valve 20 is not always reproducible depending on the injection process. In particular, error states can occur in which the check valve 20 does not close, does not close completely, or does not close in time.
- the control unit 5 is used to control the injection molding machine 1 to carry out the injection molding process, in particular the dosing process, the injection process and the holding pressure process.
- the control unit 5 is used to monitor the closing behavior of the check valve 5. For this purpose, a temporal progression of at least one variable characteristic of the injection process is determined. Suitable characteristic Variables are in particular an injection pressure IP, a torque TM of the translation drive 11, a torque RM of the rotation drive 10, an axial position SP of the plasticizing screw 9, a rotational speed RV of the plasticizing screw 9 and/or an injection speed SV. Different sensors are present on the injection molding machine 1 to record these variables.
- the injection pressure IP is the pressure with which the plastic melt 17 is injected into the tool.
- a pressure sensor 22 is arranged at the end of the plasticizing screw 9 facing away from the screw tip 18.
- the pressure sensor 22 can comprise one or more load cells.
- the plasticizing screw 9 is held in a fixed angular position by the rotary drive 10 (position control).
- the plastic melt 17 flowing behind the check valve 20 exerts a rotational force on the plasticizing screw 9 via the webs 21.
- the torque RM of the rotary drive 10 is the holding torque that the rotary drive 10 applies to hold the plasticizing screw 9 in position.
- a torque sensor 23 is connected to the rotary drive 10 to detect the torque RM.
- the torque TM of the translation drive TM is the drive torque of the electric motor of the translation drive 11, which is required to axially displace the plasticizing screw 9 during the injection process.
- the torque TM of the translation drive 10 is determined with the aid of a torque sensor 24 of the translation drive 11.
- the axial position SP of the plasticizing screw 9 is also called screw position.
- the screw position SP is determined by means of a position measuring sensor 25.
- the injection speed SV is the axial speed of the plasticizing screw 9, in particular during the injection process. It can be detected, for example, as a change in the position of the plasticizing screw 9 by means of the position measuring sensor 25.
- Figs. 2A to 2C the curves of the above-mentioned variables characteristic of the injection process are shown schematically over time t for different injection processes with different closing behavior of the check valve 20.
- the respective variables are shown in a standardized manner.
- the respective curve is shown for the injection process and, beyond the switchover time T, also for the holding pressure process.
- exemplary injection processes are shown in which the check valve 20 closes at a closing time S.
- the check valve 20 does not close. This is a fault condition in which the component quality cannot be guaranteed.
- the closing of the check valve 20 can usually be traced back to a local maximum of the torque RM of the rotary drive 10. Until the check valve 20 closes, plastic melt 17 penetrates behind the check valve and exerts a torque on the plasticizing screw 9. After the check valve 20 closes, this torque decreases. This is shown in Fig. 2C, where the torque R of the rotary drive 10 shows a clear local maximum at the closing time S. The closing of the check valve 20 is not always reflected in a maximum of the curve of the torque RM of the rotary drive 10. In the case shown in Fig. 2B, the check valve 20 closes without this being clearly deducible from the curve of the torque RM of the rotary drive. The same applies to the other variables characteristic of the injection process shown in Fig. 2B. In comparison with Fig. 2A, individual characteristics of the curves do not allow a clear distinction to be made between the closing of the check valve 20 in Fig. 2B and the fault condition in which the check valve 20 does not close in Fig. 2A.
- the control unit 5 has an evaluation algorithm 27 for determining the closing behavior of the check valve 20.
- the evaluation algorithm 27 is, for example, part of a Computer program product that is stored on a data memory of the control unit 5.
- the computer program product has instructions that, when executed by the processor of the control unit 5, execute the evaluation algorithm 27.
- the computer program product can, for example, be loaded into the main memory of the control unit 5 for execution by a processor of the control unit 5.
- the evaluation algorithm 27 was trained using methods of supervised machine learning.
- the evaluation algorithm 27 has in particular at least one artificial neural network, in particular at least one deep neural network (DNN) and/or at least one suitable ensemble method, in particular random forest and/or gradient boosted tree, and/or at least one support vector machine (SVM).
- DNN deep neural network
- SVM support vector machine
- the evaluation algorithm 27 is trained to assign the determined curves of the quantities characteristic of the injection process to different closing behaviors by classifying the closing behavior into two or more categories. For example, the evaluation algorithm 27 classifies the curves into the categories: “check valve closed” (see Fig. 2B and 2C) or “check valve not closed” (see Fig. 2A). It is also possible to classify into further subcategories. For example, the closing of the check valve 20 can be in the subcategory "closed in time” or "closed late”. Further subcategories can relate to individual curves, for example "typical curve of the torque of the rotary drive” (see Fig. 2C) or “atypical curve of the torque of the rotary drive” (see Fig. 2B).
- the evaluation algorithm 27 evaluates the curves of at least one, in particular several, preferably all of the characteristic variables described above.
- the use of an evaluation algorithm 27 based on machine learning has the advantage that the evaluation is not restricted or dependent on fixed characteristic properties of individual curves (for example on a determinable maximum of the torque RM of the rotary drive 10).
- the evaluation algorithm 27 can in particular use methods of pattern recognition and/or image recognition to identify different characteristic ristic courses to be assigned to different closing behaviors independently of specific evaluation parameters. For example, the evaluation algorithm 27 can extract one or more features characterizing the course and use them for the evaluation.
- the evaluation algorithm 27 also determines further parameters of the closing behavior, in particular a most probable closing time S, using a suitable regression algorithm. By evaluating the curves, the evaluation algorithm 27 can determine the most probable closing time S without the need for characteristic properties of the curves at the closing time S.
- the closing behavior of the check valve 20 can be reliably determined. In particular, a fault condition can be detected early. If the check valve 20 does not close or closes too late, the parts produced can, for example, be subjected to a closer inspection in order to be able to detect and sort out faulty parts early on.
- the injection molding process can be adaptively adjusted, for example by adjusting the holding pressure time and/or holding pressure level. This can be done for future injection molding cycles or within the same injection molding cycle. Variations in the closing behavior of the check valve 20 can thus be compensated in order to avoid production fluctuations and rejects.
- the control unit 5 determines the closing behavior of the check valve 20, in particular a classified category of the closing behavior, the most probable closing time and/or the non-return valve efficiency, for several closing cycles, preferably for all closing cycles.
- the determined closing behavior can, for example, be stored and/or evaluated over a longer period of time.
- the current closing behavior can be compared with previous closing behavior and/or a temporal progression of the closing behavior can be determined over several injection molding cycles. This makes it possible to monitor a state of the injection molding machine 1, in particular of the plasticizing unit 2. For example, successive deviations of the probable Closing time, non-return valve efficiency, changes in pressure and/or other variables can be detected at an early stage. This allows maintenance measures to be initiated at an early stage, which reduces waste in production and increases the longevity of the machine.
- training data can be recorded during operation, for example by recording the respective variables characteristic of the injection process.
- the training data can then be labeled manually, for example by an experienced operator and/or taking into account the part properties.
- the evaluation algorithm 27 is preferably trained using training data that is generated and, in particular, automatically labeled using a special training injection molding machine.
- An exemplary training injection molding machine 30 is shown in Fig. 3.
- the training injection molding machine 30 essentially corresponds to the injection molding machine 1 in Fig. 1. Matching components have the same reference numerals and are not explained again.
- the training injection molding machine 30 differs from the injection molding machine 1 essentially by an additional training sensor 31.
- the training sensor 31 measures at least indirectly the closing behavior of the check valve 20.
- the training sensor 31 is a pressure sensor arranged behind the check valve 20 for measuring the melt pressure MP behind the check valve 20.
- the melt pressure MP depends directly on the plastic melt 17 flowing back behind the check valve 20. As soon as the check valve 20 is closed, no more plastic melt 17 flows in, so that the melt pressure MP decreases.
- the training sensor 31 enables clear statements to be made about the closing state of the check valve 20.
- the melt pressure MP which is detected using the training sensor 31, is plotted over time t for various injection processes.
- the injection processes shown in Figs. 4A to 4C correspond to those of the parameter curves shown in Figs. 2A to 2C.
- the melt pressure MP increases continuously up to the closing time S and drops abruptly after the check valve 20 closes. Irrespective of the course of the other characteristic variables, the melt pressure MP forms a characteristic maximum at the closing time, which allows concrete statements to be made about the closing behavior and the closing time S. In the event that the check valve 20 does not close, the melt pressure MP also has a clear course, which does not have a local maximum up to the switching time T.
- the closing time S, the non-return valve efficiency and the closing behavior can be reliably determined independently of other variables.
- the knowledge gained in this way can be used as a label for the training data.
- the training data obtained with the help of the training injection molding machine 30 can be automatically fabled using the melt pressure MP.
- the training injection molding machine 30 is used to run through a large number of injection molding cycles and its control unit 32 is used to record the respective course of the variables characteristic of the injection process, in particular the injection pressure IP, the torque TM of the translation drive 11, the torque RM of the rotation drive 10, the axial position of the plasticizing screw SP, the rotational speed RM of the plasticizing screw 9 and/or the injection speed SV.
- the melt pressure MP is recorded using the training sensor 31.
- the control unit 32 evaluates the melt pressure MP and determines the closing behavior and, if applicable, the closing time S and/or the non-return valve efficiency. These parameters are assigned to the training data as labels. Training data sets are generated from training data and the associated label.
- the evaluation algorithm can be trained using known machine learning methods.
- the trained evaluation algorithm 27 reliably determines the closing behavior without evaluating the melt pressure MP.
- the additional sensor is expensive and requires a lot of maintenance. Training with the help of the training injection molding machine allows, with the help of a data-driven evaluation, to derive information about the melt pressure MP from the other variables that are characteristic of the injection process, without the need for the training sensor 31.
- an ultrasonic sensor can be arranged in addition to or instead of a pressure sensor arranged behind the check valve, which detects the closing of the check valve using ultrasound.
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Software Systems (AREA)
- Physics & Mathematics (AREA)
- Computing Systems (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Evolutionary Computation (AREA)
- Data Mining & Analysis (AREA)
- Artificial Intelligence (AREA)
- Computational Linguistics (AREA)
- Medical Informatics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biomedical Technology (AREA)
- Biophysics (AREA)
- General Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Health & Medical Sciences (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP24731846.2A EP4713188A1 (de) | 2023-06-05 | 2024-06-04 | VERFAHREN ZUM BETRIEB EINER SPRITZGIEßMASCHINE, SPRITZGIEßMASCHINE UND COMPUTERPROGRAMMPRODUKT |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102023205218.0 | 2023-06-05 | ||
| DE102023205218.0A DE102023205218A1 (de) | 2023-06-05 | 2023-06-05 | Verfahren zum Betrieb einer Spritzgießmaschine, Spritzgießmaschine und Computerprogrammprodukt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024251703A1 true WO2024251703A1 (de) | 2024-12-12 |
Family
ID=91465335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2024/065269 Pending WO2024251703A1 (de) | 2023-06-05 | 2024-06-04 | VERFAHREN ZUM BETRIEB EINER SPRITZGIEßMASCHINE, SPRITZGIEßMASCHINE UND COMPUTERPROGRAMMPRODUKT |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4713188A1 (de) |
| DE (1) | DE102023205218A1 (de) |
| WO (1) | WO2024251703A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102023205218A1 (de) | 2023-06-05 | 2024-12-05 | Sumitomo (Shi) Demag Plastics Machinery Gmbh | Verfahren zum Betrieb einer Spritzgießmaschine, Spritzgießmaschine und Computerprogrammprodukt |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0453720A (ja) * | 1990-06-22 | 1992-02-21 | Japan Steel Works Ltd:The | 射出成形機の射出装置の逆流ストローク算出方法及び装置 |
| US7713049B2 (en) * | 2007-07-17 | 2010-05-11 | Fanuc Ltd | Injecting molding machine having a torque detecting device |
| JP5144442B2 (ja) * | 2008-09-12 | 2013-02-13 | ファナック株式会社 | 射出成形機およびその逆流防止弁閉鎖状態判別方法 |
| DE102017004374A1 (de) * | 2016-05-12 | 2017-11-16 | Fanuc Corporation | Abriebgrössen-Schätzvorrichtung und Abriebgrössen-Schätzverfahren für das Rückschlagventil einer Spritzgiessmaschine |
| JP2023041084A (ja) * | 2021-09-13 | 2023-03-24 | Ubeマシナリー株式会社 | 射出成形方法 |
| DE102023205218A1 (de) | 2023-06-05 | 2024-12-05 | Sumitomo (Shi) Demag Plastics Machinery Gmbh | Verfahren zum Betrieb einer Spritzgießmaschine, Spritzgießmaschine und Computerprogrammprodukt |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4177399B2 (ja) * | 2006-10-27 | 2008-11-05 | 日精樹脂工業株式会社 | 射出成形機の制御方法 |
| DE102013111257B3 (de) * | 2013-10-11 | 2014-08-14 | Kraussmaffei Technologies Gmbh | Verfahren zur Prozessführung eines Formfüllvorgangs einer Spritzgießmaschine |
| JP6659647B2 (ja) * | 2017-09-29 | 2020-03-04 | ファナック株式会社 | 数値制御システム及び逆流防止弁状態検知方法 |
-
2023
- 2023-06-05 DE DE102023205218.0A patent/DE102023205218A1/de active Pending
-
2024
- 2024-06-04 EP EP24731846.2A patent/EP4713188A1/de active Pending
- 2024-06-04 WO PCT/EP2024/065269 patent/WO2024251703A1/de active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0453720A (ja) * | 1990-06-22 | 1992-02-21 | Japan Steel Works Ltd:The | 射出成形機の射出装置の逆流ストローク算出方法及び装置 |
| US7713049B2 (en) * | 2007-07-17 | 2010-05-11 | Fanuc Ltd | Injecting molding machine having a torque detecting device |
| JP5144442B2 (ja) * | 2008-09-12 | 2013-02-13 | ファナック株式会社 | 射出成形機およびその逆流防止弁閉鎖状態判別方法 |
| DE102017004374A1 (de) * | 2016-05-12 | 2017-11-16 | Fanuc Corporation | Abriebgrössen-Schätzvorrichtung und Abriebgrössen-Schätzverfahren für das Rückschlagventil einer Spritzgiessmaschine |
| JP2023041084A (ja) * | 2021-09-13 | 2023-03-24 | Ubeマシナリー株式会社 | 射出成形方法 |
| DE102023205218A1 (de) | 2023-06-05 | 2024-12-05 | Sumitomo (Shi) Demag Plastics Machinery Gmbh | Verfahren zum Betrieb einer Spritzgießmaschine, Spritzgießmaschine und Computerprogrammprodukt |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102023205218A1 (de) | 2024-12-05 |
| EP4713188A1 (de) | 2026-03-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE102020102370B4 (de) | Zustandsbestimmungsvorrichtung und zustandsbestimmungsverfahren | |
| DE69124530T2 (de) | Steuerung einer spritzgiessmaschine | |
| DE19743600B4 (de) | Verfahren zur Überwachung eines zyklischen Produktionsprozesses | |
| DE102019128177A1 (de) | Vorrichtung und verfahren zur zustandsbestimmung | |
| EP3057760B1 (de) | Verfahren zur beurteilung verfahrenstechnischer eigenschaften von spritzgiesswerkzeugen | |
| EP2583811B2 (de) | Verfahren zur Quantifizierung von Prozessschwankungen bei einem Einspritzvorgang einer Spritzgießmaschine | |
| EP2539785B1 (de) | Verfahren zur regelung eines spritzgiessprozesses | |
| WO2019185594A1 (de) | VERFAHREN ZUR AUTOMATISCHEN PROZESSÜBERWACHUNG UND PROZESSDIAGNOSE EINES STÜCKBASIERTEN PROZESSES (BATCH-FERTIGUNG), INSBESONDERE EINES SPRITZGIEßPROZESSES UND EINE DEN PROZESS DURCHFÜHRENDE MASCHINE ODER EIN DEN PROZESS DURCHFÜHRENDER MASCHINENPARK | |
| EP2824450A1 (de) | Verfahren zur Auswertung eines Messergebnisses einer thermischen Analyse, sowie Verwendung des Verfahrens, Rechnereinrichtung, Computerprogrammprodukt und System zur Ausführung des Verfahrens | |
| DE69006846T2 (de) | Verfahren zum unterscheiden nichtdefekter teile von defekten teilen bei spritzgiessmaschinen. | |
| DE112021005251T5 (de) | Zustandsbestimmungsvorrichtung und zustandsbestimmungsverfahren | |
| EP4713188A1 (de) | VERFAHREN ZUM BETRIEB EINER SPRITZGIEßMASCHINE, SPRITZGIEßMASCHINE UND COMPUTERPROGRAMMPRODUKT | |
| WO2019048552A1 (de) | Verfahren und vorrichtung zur herstellung von behältern aus thermoplastischem material | |
| DE60103125T2 (de) | Rheometrieverfahren und -vorrichtung sowie ihre anwendung zur steuerung der polymerherstellung | |
| EP4335622A1 (de) | Verfahren und vorrichtung zum behandeln von behältnissen mit identifikation ausgeleiteter behältnisse | |
| WO2011134863A1 (de) | Verfahren zur darstellung eines programmierbaren ablaufs für eine oder mehrere maschinen mit einem zyklisch wiederkehrenden maschinenbetriebsablauf | |
| DE112021005248T5 (de) | Zustandsbestimmungsvorrichtung und zustandsbestimmungsverfahren | |
| DE102019108997A1 (de) | Verfahren zum Bestimmen eines Lösungszustands eines Gases | |
| DE2446023C2 (de) | Verfahren zum Betrieb mindestens einer Formpresse | |
| DE112022003617B4 (de) | Spritzformmaschinen-bestehen/nicht-bestehen-bestimmungssystem | |
| DE60220327T2 (de) | Verfahren und Vorrichtung zur Bewertung von Kunststoffen unter Verwendung einer Spritzgiessmaschine | |
| WO2018197362A1 (de) | Verfahren zur kontrolle einer folienproduktion | |
| DE10222662B4 (de) | Verfahren zum Überwachen von Betriebsdaten einer Spritzgussmaschine | |
| EP3616013A1 (de) | Verfahren zur kontrolle einer folienproduktion | |
| EP2485889B1 (de) | Vorrichtung und verfahren zur weiterverarbeitung, insbesondere beleimung, von sackhalbzeugen |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 24731846 Country of ref document: EP Kind code of ref document: A1 |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 2024731846 Country of ref document: EP |
|
| ENP | Entry into the national phase |
Ref document number: 2024731846 Country of ref document: EP Effective date: 20251216 |
|
| ENP | Entry into the national phase |
Ref document number: 2024731846 Country of ref document: EP Effective date: 20251216 |
|
| ENP | Entry into the national phase |
Ref document number: 2024731846 Country of ref document: EP Effective date: 20251216 |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| ENP | Entry into the national phase |
Ref document number: 2024731846 Country of ref document: EP Effective date: 20251216 |
|
| ENP | Entry into the national phase |
Ref document number: 2024731846 Country of ref document: EP Effective date: 20251216 |
|
| ENP | Entry into the national phase |
Ref document number: 2024731846 Country of ref document: EP Effective date: 20251216 |
|
| ENP | Entry into the national phase |
Ref document number: 2024731846 Country of ref document: EP Effective date: 20251216 |
|
| ENP | Entry into the national phase |
Ref document number: 2024731846 Country of ref document: EP Effective date: 20251216 |