Method for establishing a target value

Patent metadata

Field	Value
Publication number	US-11148334-B2
Application number	US-202017070424-A
Country	US
Kind code	B2
Filing date	Oct 14, 2020
Priority date	Oct 15, 2019
Publication date	Oct 19, 2021
Grant date	Oct 19, 2021

Abstract

A target value progression for a process parameter functioning as a setting variable is established so that an actual value progression for a selected variable has a desired property, or the desired actual value progression itself ensues. The actual value progression occurring in relation to the first configuration is predetermined as a reference value progression for the selected variable, and a target value progression for the process parameter functioning as the setting variable is established by a computer so that the reference value progression as the actual value progression with the desired property or the desired actual value progression itself ensues when the shaping machine in the second configuration operates in a production cycle in accordance with the selected target value progression for the at least one process parameter functioning as the setting variable.

First claim

The invention claimed is:

1. A method of establishing a first target value progression for at least one process parameter functioning as a setting variable of a production cycle of a cyclically operating first shaping machine, wherein an actual value progression for at least one selected variable ensues when the first shaping machine operates in a production cycle in accordance with the first target value progression for the at least one process parameter functioning as the setting variable, wherein at least one desired property of the actual value progression for the at least one selected variable or a desired actual value progression itself is predetermined, and a second target value progression for the at least one process parameter functioning as the setting variable is so established by a computer that an actual value progression for the at least one selected variable with the at least one desired property or the desired actual value progression itself ensues, the method comprising:
with the first shaping machine in a first configuration in at least one production cycle, establishing the second target value progression for the at least one process parameter functioning as the setting variable such that an actual value progression for the at least one selected variable has the at least one desired property, or such that the desired actual value progression itself ensues; and
in a second shaping machine in a second configuration different from the first configuration, adapting the actual value progression occurring in relation to the first configuration as a reference value progression for the at least one selected variable, and establishing a third target value progression by the computer for the at least one process parameter functioning as the setting variable such that the reference value progression ensues as the actual value progression with the at least one desired property, or such that the desired actual value progression itself ensues, when the second shaping machine in the second configuration operates in a production cycle in accordance with the established third target value progression for the at least one process parameter functioning as the setting variable.

2. The method according to claim 1 , wherein the first shaping machine in the first configuration and/or the second shaping machine in the second configuration is in the form of a simulation simulatable by a computer, and the operation of determining the actual value progression is effected using the simulation and a computer by a corresponding one of the established second and third target value progressions for the at least one process parameter functioning as the setting variable such that the actual value progression afforded by the simulation has the at least one desired property, or such that the desired actual value progression itself ensues.

3. The method according to claim 1 , wherein the first shaping machine in the first configuration and/or the second shaping machine in the second configuration is in the form of a physically existing shaping machine and the operation of determining the actual value progression is effected using the physically existing shaping machine by a corresponding one of the established second and third target value progressions for the at least one process parameter functioning as the setting variable such that the actual value progression at the physically existing shaping machine has the at least one desired property or corresponds to the desired actual value progression.

4. The method according to claim 1 , wherein the first and second shaping machines in the first and the second configurations use an identical moulding tool in which at least one moulding is produced in the production cycle, and wherein the shaping machines are different from each other in relation to at least one of:
a plasticizing unit which serves to produce a moulding material for introduction into the moulding tool and/or to introduce the moulding material into the moulding tool;
an injection unit which serves to introduce a moulding material into the moulding tool;
a drive unit or electrical or hydraulic drive type;
a closing unit;
a material used for the moulding material;
production tolerances; and
machine parametrisation.

5. The method according to claim 1 , wherein the at least one process parameter of a production cycle, functioning as the setting variable, and the at least one selected variable which ensues when one of the first and second shaping machines in a production cycle operates in accordance with a corresponding one of the established second and third target value progressions for the at least one process parameter functioning as the setting variable relate to a plasticising process and/or an injection process of the production cycle.

6. The method according to claim 1 , wherein the at least one process parameter functioning as the setting variable and/or the at least one selected variable is or are selected from the group consisting of:
a time-dependent or travel-dependent profile of an injection speed of moulding material into a shaping tool;
a time-dependent or travel-dependent profile of an injection volume of moulding material into a shaping tool,
a switchover point from a time-dependent or travel-dependent profile for an injection speed of moulding material into a shaping tool to a time-dependent pressure profile;
a profile of a holding pressure after filling of a shaping tool with moulding material;
a time-dependent or travel-dependent profile of a metering speed of a plasticising unit;
a time-dependent or travel-dependent profile of a dynamic pressure of a plasticising unit;
a time-dependent or travel-dependent profile of a closing movement of a closing unit; and
a time-dependent or travel-dependent profile of an ejection movement of an ejection device.

7. The method according to claim 5 , wherein a portion-wise or complete progression with respect to the at least one selected variable is selected from the group consisting of:
a progression of a pressure of moulding material at least one selected position of one of the first and second shaping machines;
a progression in a volume flow of moulding material into a shaping tool;
a progression in speed during a holding pressure phase;
a flow front speed;
a mould internal pressure;
a metering speed of a plasticising unit;
a dynamic pressure of a plasticising unit;
a plasticizing moment of a plasticising unit;
a closing speed and/or closing force and/or torque of a drive unit of a closing unit; and
an ejection speed and/or ejection force and/or torque of a drive unit of an ejection device.

8. The method according to claim 1 , wherein the at least one desired property of the actual value progression for the at least one selected variable is selected from the group consisting of:
avoiding or limiting peaks in the actual value progression;
limiting a first and/or a higher derivative of the actual value progression;
predetermining reference points on a curve and associated tolerance ranges;
minimum and maximum values in given process phases or at specific travel or time points;
a maximum required time for carrying out a movement or selected phases of the production cycle or the entire production cycle;
a maximum amount of material which is injected by way of holding pressure; and
portion-wise or complete appearance of a time-dependent or travel-dependent progression.

9. A method of open-loop or closed-loop control of a cyclically operating first shaping machine, wherein a first target value progression is predetermined for at least one process parameter of a production cycle of the cyclically operating first shaping machine for open-loop or closed-loop co

Assignees

• Engel Austria Gmbh

Inventors

• Koppauer Herwig
• Pillwein Georg
• Springer Klemens
• Kilian Friedrich Johannes

Classifications

• B29C2945/76949

  using a learning system, i.e. the system accumulates experience from previous occurrences, e.g. adaptive control · CPC title

• G05B19/401

  characterised by control arrangements for measuring, e.g. calibration and initialisation, measuring workpiece for machining purposes (G05B19/19 takes precedence) · CPC title

• B29C2945/76933

  The operating conditions are corrected immediately, during the same phase or cycle · CPC title

• B29C2945/76936

  The operating conditions are corrected in the next phase or cycle · CPC title

• B29C45/76 Primary

  Measuring, controlling or regulating {(measuring in general G01; controlling or regulating in general G05)} · CPC title