Method for operating a device, computer program product and device for producing a product
A method for operating a device to produce a product includes capturing at least one quality data record that includes measured values of one or more quality parameters that each correspond to one property of the product. The method captures at least one associated machine data record including actual values of several adjustable machine parameters of the device, chronologically assigns the quality data record to the machine data record, and generates a first data record comprising chronologically-correlated measured values and actual values. The preceding steps are repeated at least once to generate at least one second data record. A correlation is determined between the quality parameter(s) and the machine parameter(s). The method provides a corresponding target value for at least one of the adjustable machine parameters on the basis of the control model, proceeding from a target value of the quality parameter(s).
1. A method for operating a blow molding device to produce a molded component, the method comprising a learning phase and a production phase, that makes it possible to dispense with a check in the subsequent production process of the particular products that are made:
providing the blow molding device with a controller and having a volume V and one or more adjustable machine parameters including temperature T and pressure P;
the learning phase comprising the steps of:
capturing, by the controller at least one quality data record comprising measured values of one or more quality parameters that each correspond to a physical property of the molded component;
capturing, by the controller, at least one associated machine data record comprising actual values of the one or more adjustable machine parameters of the blow molding device;
chronologically assigning, by the controller, the quality data record to the machine data record and generating a first data record comprising chronologically-correlated measured values and actual values;
repeating the preceding steps at least once to generate at least one second data record;
determining, by the controller, a correlation between the one or more quality parameters and the one or more adjustable machine parameters by comparing the captured first and second data records; and
creating a control model for the blow molding device based on the correlation; and
the production phase comprising the steps of:
providing, by the controller, a corresponding target value for at least one of the one or more adjustable machine parameters using the control model, proceeding from a target value of the one or more quality parameters;
comparing, by the controller, the actual values of the one or more adjustable machine parameters with the respective corresponding target value; and
controlling, by the controller, the blow molding device based on a deviation of the actual value of the one or more adjustable machine parameters from the respective corresponding target value.
2. The method according to claim 1 , further comprising:
capturing, by the controller, at least one environmental data record comprising measured values of one or more environmental parameters; and
assigning the measured values of the one or more environmental parameters chronologically to the machine data record in order to therefore form a part of the respective captured first and second data records.
3. The method according to claim 2 , further comprising:
capturing actual values of the one or more adjustable machine parameters and at least one of the one or more environmental parameters;
proceeding from the actual value and using the control model, outputting the measured values of the one or more quality parameters corresponding to the actual value;
comparing the actual values with the target value(s) of the quality parameter(s);
determining a deviation; and
controlling the device by proceeding from the deviation and based at least in part on the actual value of the at least one environmental parameter.
4. The method according to claim 3 , wherein capturing the actual values of the one or more adjustable machine parameters and of the at least one environmental parameters is performed continuously while the blow molding device is operating.
5. The method according to claim 3 wherein capturing the actual values of the one or more adjustable machine parameters and of the at least one environmental parameters is performed cyclically while the blow molding device is operating.
6. The method according to claim 3 , further comprising:
determining whether one or more of the actual values of the one or more adjustable machine parameters or the at least one environmental parameters captured while controlling is within a value range of the one or more adjustable machine parameters captured in the creation of the control model and/or the captured at least one environmental parameters.
7. The method according to claim 6 , comprising:
determining that one or more of the actual values is outside the value range;
determining that a deviation of the actual values repeatedly occurs; and
outputting an error signal.
8. The method according to claim 6 , comprising:
determining that one or more of the actual values is outside the value range;
determining that a deviation from the value range is significant for the control model; and
outputting an error signal.
9. The method according to claim 8 , wherein the deviation is significant if either (i) the deviating actual value relates to one or more adjustable machine parameter which is regulated with a high weighting to the target value of one or more quality parameters, or (ii) if the deviation has exceeded a predetermined threshold value.
10. The method according to claim 9 , comprising:
determining that the deviation is significant or repeatedly occurs; and
switching off the blow molding device, or requesting manual control interventions.
11. The method according to claim 1 , comprising:
capturing, by the controller, test results during operation of the blow molding device to produce the molded component;
wherein creating the control model for the blow molding device is performed based on the test results; and
wherein capturing the at least one quality data record and capturing the at least one associated machine data record are performed at least once on the basis of the test results.
12. The method according to claim 1 , wherein the first and second data records are determined by collecting a plurality of chronologically-correlated measured values and actual values from production plants and wherein creating the control model for the device uses the collected chronologically-correlated measured values and actual values.
13. The method according to claim 1 , wherein determining the control model is performed according to the correlation between the one or more quality parameters and the one or more adjustable machine parameters, taking into account the at least one of the one or more quality parameters by means of machine learning.
14. The method according to claim 1 , wherein the machine data record comprises a plurality of adjustable machine parameters, and the method comprises assigning a weighting of an influence of each one of the plurality of adjustable machine parameters on each of the one or more quality parameters to each of the one or more adjustable machine parameters according to the correlation with the one or more quality parameters of the quality data record.
15. The method according to claim 14 , further comprising:
regulating at least one of the one or more of the respective adjustable machine parameters with the respective weighting with respect to the one or more quality parameter(s) according to the control model.
16. A computer program product comprising commands which, when run on a computer, cause the device to execute the steps of the method according to claim 1 .
17. A device for molding a hollow body, comprising a computer program product according to claim 16 .
18. The device according to claim 17 , wherein the device is a component of a device configured for one or more of (i) injection molding or for blow molding, (ii) a dryer for starting material for the production of the product, (iii) an extrusion blowing device, or (iv) a stretching blowing device.
19. The device according to claim 18 , wherein the device is an extruder.