Graphical interface driven injection blow molding apparatus

• US 5,470,218 A
• Filed: 07/07/1993
• Issued: 11/28/1995
• Est. Priority Date: 07/07/1993
• Status: Expired due to Term

• Current Assignee: Wheaton, Inc. (Crown Holdings Incorporated)
• Original Assignee: Wheaton, Inc. (Crown Holdings Incorporated)
• Inventors: Jacoby, Bruce E., Barbosa, Rui M., Hillman, Michael J.
• Primary Examiner(s): HEITBRINK, TIMOTHY W
• Application Number:
  US08/088,427
• Time in Patent Office: 874 Days
• Field of Search: 425/143, 425/144, 425/145, 425/149, 425/150, 425/522, 264/40.5, 264/40.6, 264/40.7
• US Class Current: 425/144
• CPC Class Codes: B29C 2037/906 using visualisation means or linked accessories, e.g. screens, printers
• CPC Class Codes: B29C 2045/7606 Controlling or regulating the display unit
• CPC Class Codes: B29C 2049/78805 Computer or PLC control
• CPC Class Codes: B29C 2949/0715 the preform having one end closed
• CPC Class Codes: B29C 45/768 Detecting defective moulding conditions B29C45/84 takes precedence
• CPC Class Codes: B29C 49/06 Injection blow-moulding
• CPC Class Codes: B29C 49/78 Measuring, controlling or regulating

Abstract

An improved injection blow molding apparatus. The apparatus includes an injection blow molding machine having work stations and molds. The apparatus includes a process controller for operating the blow molding machine according to a set of processing parameters. Each processing parameter has a respective desired operating range. The apparatus includes a touch screen for inputting signals to the processor for commanding the process controller to adjust the processing parameters. Display software and hardware coupled to the process controller and the touch screen cause the monitor to display respective icons representing each processing parameter. The value of each respective processing parameter is displayed adjacent to the icon. Graphing software generates signals which are transmitted to the monitor. The monitor displays a graph of the selected processing parameter value as a function of time. The graph is plotted in response to an operator touching a portion of the touch screen beneath which the selected icon is displayed. Alarm software causes the monitor to display an alarm message. The alarm message identifies whether any one of the processing parameters is operating outside its desired operating range.

Claims

1. In an injection blow molding apparatus including a plurality of injection blow molding machines, each machine having a plurality of work stations and a plurality of molds, said molds including injection molds and blow molds, wherein work pieces in each machine are first injection molded, then blown and removed at successive work stations, the improvement comprising:

a plurality of process controllers and a plurality of processors for operating said plurality of machines, each of said process controllers coupled to a respective machine and to a respective processor and operating in accordance with a respective set of processing parameters, each processing parameter in each respective set having a respective desired operating range;

a plurality of monitors, each of said monitors coupled to a respective processor, each of said monitors displaying a plurality of command buttons and icons and having a respective touch screen, each touch screen transmitting signals to said respective processor for adjusting said processing parameters;

a master processor coupled to each of said plurality of processors, said master processor having a monitor, wherein each respective processor transmits a respective set of signals to said master processor representing a respective set of processing parameters being used by the respective one of said process controllers which is coupled to said respective processor, and wherein said master processor includes;

main menu means for causing said master processor to display a plurality of command buttons, each button representing a respective machine, for selecting one of said machines for which a respective one of said sets of processing parameters is to be displayed by said master processor,

display means for displaying a plurality of icons, each icon representing a respectively different processing parameter from said selected machine, and for displaying, adjacent to each of said icons, the value of each respective processing parameter, and

alarm means for displaying an alarm message identifying whether any one of said processing parameters in said selected machine is operating outside its desired operating range,

wherein said master processor and each one of said plurality of processors are coupled to a network, and each one of said plurality of processors includes;

means for detecting an error condition which prevents said one processor from transmitting data to said master processor;

means for automatically disconnecting said one processor from said network in response to said error condition; and

means for automatically establishing a new connection between said processor and said network, whereby said error condition is corrected.

2. Injection blow molding apparatus in accordance with claim 1, wherein each of the machines includes a monitor having a a touch screen, said touch screen transmitting signals to said processor of said machine for adjusting said processing parameters.

3. Injection blow molding apparatus in accordance with claim 2, wherein each of the machines includes display means coupled to said control means for causing said monitor to display an icon in the form of a picture of a portion of said machine, said icon representing a selected processing parameter and, adjacent to said icon, the value of said selected processing parameter.

4. Injection blow molding apparatus in accordance with claim 3, wherein each of the machines includes graphing means for transmitting to said monitor signals which cause said monitor to display a graph of said selected processing parameter value plotted as a function of time in response to an operator touching a portion of said touch screen beneath which said icon is displayed.

5. Injection blow molding apparatus in accordance with claim 4, wherein each of the machines includes alarm means coupled to said control means for causing said monitor to display an alarm message identifying whether any one of said processing parameters is operating outside its desired operating range

6. Injection blow molding apparatus in accordance with claim 1, in which the master processor includes graphing means for transmitting to said master processor monitor signals which cause said monitor to display a graph of a selected processing parameter value plotted as a function of time in response to an operator touching a portion of the touch screen of the master processor beneath which said icon is displayed.

7. Injection blow molding apparatus in accordance with claim 6, further comprising:

storage means for storing data, wherein the graphing means comprises;

means for retrieving from the storage means a set of previously stored data values for the selected processing parameter;

means for assigning said data values to a plurality of subgroups, each respective subgroup having data values collected during an interval of time;

means for selecting a minimum value and a maximum value from one of said subgroups which is collected during said one interval; and

means for generating signals which cause said monitor to display a line segment extending from said minimum value to said maximum value, said line segment having a time coordinate equal to a time at which said data values within said subgroup were previously stored.

8. Injection blow molding apparatus in accordance with claim 6, wherein said master processor includes means for transmitting to said monitor of said master processor signals which cause said monitor to display a menu command button, wherein said icon and said value are displayed in response to an operator touching one of said portions of the touch screen of the master processor beneath which said menu command button is displayed.

9. Injection blow molding apparatus in accordance with claim 6, wherein said graph is displayed for a range of time coordinates, and wherein said graphing means include:

means for transmitting signals which cause said monitor to display a forward command button and a backward command button for changing said range of time coordinates for which said graph is displayed, in response to an operator touching one of said portions of said touch screen beneath which said forward command button and said backward command button are displayed.

10. Injection blow molding apparatus in accordance with claim 1, wherein said alarm means transmits to the monitor of the master processor signals which cause said alarm message to be displayed as text on a background field, said background field having a first color while each respective processing parameter value is within a respective desired operating range, said background field having a second color while any one of said processing parameter values exceeds a maximum value in said desired operating range, said background field having a third color while any one of said processing parameter values is less than a minimum value in said desired operating range.

11. Injection blow molding apparatus in accordance with claim 1, wherein said alarm message is displayed continuously.

12. Injection blow molding apparatus in accordance with claim 1, wherein said value of said selected processing parameter is displayed in the form of text on a background field, said background field having a first color while said value is within its desired operating range, said background field having a second color while said value exceeds a maximum value in said desired operating range, said background field having a third color while said value is less than a minimum value in said desired operating range.

13. Injection blow molding apparatus in accordance with claim 1, wherein said display means include means for displaying said icon and said value within a window on said monitor.

14. Injection blow molding apparatus in accordance with claim 13, wherein said alarm means include means for displaying said alarm message within said window.

15. Injection blow molding apparatus in accordance with claim 13, wherein said window is sized to fill said monitor.

16. Injection blow molding apparatus in accordance with claim 1, wherein each machine includes:

a barrel, a nozzle and a manifold, each having a respective temperature sensor,

wherein said display means cause the monitor of the master processor to display a respective temperature icon and a respective temperature data value measured by the sensor in each of said barrel, said nozzle and said manifold of said selected machine.

17. Injection blow molding apparatus in accordance with claim 1, wherein each of said molds of said selected machine has a temperature sensor, said blow mold has an air pressure sensor, and said display means transmit signals which cause said monitor of said master processor to display, for each respective mold, a temperature icon and a temperature data value measured by the respective temperature sensor, and cause said blow mold to display an air pressure icon and an air pressure data value measured by the air pressure sensor.

18. Injection blow molding apparatus in accordance with claim 1, wherein said selected machine includes an injection screw having a pressure sensor, and wherein said display means transmit signals which cause said monitor of said master processor to display a pressure icon and a pressure data value measured by said injection screw pressure sensor.

19. In an injection blow molding apparatus including a plurality of injection blow molding machines, each machine having a plurality of work stations and a plurality of molds, said molds including injection molds and blow molds, wherein work pieces in each machine are first injection molded, then blown and removed at successive work stations, the improvement comprising:

a plurality of process controllers and a plurality of processors for operating said plurality of machines, each of said process controllers coupled to a respective machine and to a respective processor and operating in accordance with a respective set of processing parameters, each processing parameter in each respective set having a respective desired operating range;

a plurality of monitors, each of said monitors coupled to a respective processor, each of said monitors displaying a plurality of command buttons and icons and having a respective touch screen, each touch screen transmitting signals to a respective processor for adjusting said processing parameters;

a master processor coupled to each of said plurality of processors, said master processor having a monitor, wherein each respective processor transmits a respective set of signals to said master processor representing a respective set of processing parameters being used by the respective one of said process controllers which is coupled to said respective processor;

a remote processor coupled to said master processor, said remote processor having a monitor, wherein said master processor transmits a respective set of signals to said remote processor representing the respective set of processing parameters received by the master processor,

wherein said master processor and said remote processor each include;

main menu means for displaying a plurality of command buttons, each button representing a respective machine, for selecting one of said machines for which a respective one of said sets of processing parameters is to be displayed,

display means for displaying a plurality of icons, each icon representing a respectively different processing parameter from said selected machine, and for displaying, adjacent to each of said icons, the value of its respective parameter, and

alarm means for displaying an alarm message identifying whether any one of said processing parameters in said selected machine is operating outside its desired operating range,

wherein said master processor, said remote processor and each one of said plurality of processors are coupled to a network, and each one of said plurality of processors includes;

means for detecting an error condition which prevents said one processor from transmitting data to said master processor;

means for automatically disconnecting said one processor from said network in response to said error condition; and

means for automatically establishing a new connection between said processor and said network, whereby said error condition is corrected.

20. Injection blow molding apparatus in accordance with claim 19, wherein the master processor is commanded from said remote processor.

21. In an injection blow molding apparatus including an injection blow molding machine having a plurality of work stations and a plurality of molds, which include injection molds and blow molds, wherein work pieces are first injection molded, then blown and removed at successive work stations, the machine including an injection screw having a pressure sensor and a position sensor, the apparatus including control means for operating said machine in accordance with a set of processing parameters, each processing parameter having a respective desired operating range, the improvement comprising:

a monitor having a a touch screen, said touch screen transmitting signals to said control means for adjusting said processing parameters;

display means coupled to said control means for causing said monitor to display an icon in the form of a picture of a portion of said machine, said icon representing a selected processing parameter and, adjacent to said icon, the value of said selected processing parameter, the display means including means for displaying a transfer mode control switch on said monitor;

graphing means for transmitting to said monitor signals which cause said monitor to display a graph of said selected processing parameter value plotted as a function of time in response to an operator touching a portion of said touch screen beneath which said icon is displayed;

alarm means coupled to said control means for causing said monitor to display an alarm message identifying whether any one of said processing parameters is operating outside a desired operating range;

means for transmitting signals to operate the machine in response to an operator touching a portion of said touch screen beneath which said transfer mode control switch is displayed, so that the injection mold is filled according to either one of a desired transfer pressure profile and a desired screw velocity profile;

means for measuring and displaying the position of the injection screw when the injection mold is filled, if the transfer pressure profile is used to control injection mode filling.

22. Injection blow molding apparatus in accordance with claim 21, wherein said alarm means transmits to said monitor signals which cause said alarm message to be displayed as text on a background field, said background field having a first color while each respective processing parameter value is within its respective desired operating range, said background field having a second color while any one of said processing parameter values exceeds a maximum value in said desired operating range, said background field having a third color while any one of said processing parameter values is less than a minimum value in said desired operating range.

23. Injection blow molding apparatus in accordance with claim 22, wherein said alarm message is displayed continuously.

24. Injection blow molding apparatus in accordance with claim 23 wherein said alarm means include means for displaying said alarm message within a window on said monitor.

25. In an injection blow molding apparatus including an injection blow molding machine having a plurality of work stations and a plurality of molds, which include injection molds and blow molds, wherein work pieces are first injection molded, then blown and removed at successive work stations, and including control means for operating said machine in accordance with a set of processing parameters, each processing parameter having a respective desired operating range, the improvement comprising:

a monitor having a a touch screen, said touch screen transmitting signals to said control means for adjusting said processing parameters;

display means coupled to said control means for causing said monitor to display an icon in the form of a picture of a portion of said machine, said icon representing a selected processing parameter and, adjacent to said icon, the value of said selected processing parameter;

graphing means for transmitting to said monitor signals which cause said monitor to display a graph of said selected processing parameter value plotted as a function of time in response to an operator touching a portion of said touch screen beneath which said icon is displayed, wherein the graphing means comprises;

(1) means for retrieving from the storage means a set of previously stored data values for the selected processing parameter,

(2) means for assigning said data values to a plurality of subgroups, each respective subgroup having data values collected by said control means during an interval of time,

(3) means for selecting a minimum value and a maximum value from one of said subgroups which is collected during said one interval, and

(4) means for generating signals which cause said monitor to display a line segment extending from said minimum value to said maximum value, said line segment having a time coordinate equal to a time at which said data values within said subgroup were previously stored; and

alarm means coupled to said control means for causing said monitor to display an alarm message identifying whether any one of said processing parameters is operating outside a desired operating range, said alarm means transmitting to said monitor signals which cause said alarm message to be displayed as text on a background field, said background field having a first color while each respective processing parameter value is within a respective desired operating range, said background field having a second color while any one of said processing parameter values exceeds a maximum value in said desired operating range, said background field having a third color while any one of said processing parameter values is less than a minimum value in said desired operating range.