INJECTION MOLDING SYSTEM CAPABLE OF DETECTING PRESSURE ABNORMALITY

• US 20150099026A1
• Filed: 10/06/2014
• Published: 04/09/2015
• Est. Priority Date: 10/07/2013
• Status: Abandoned Application

• Current Assignee: Fanuc Corporation
• Original Assignee: Fanuc Corporation
• Inventors: SHIRAISHI, Wataru
• Application Number:
  US14/506,727
• Publication Number:
  US 20150099026A1
• Time in Patent Office: Days
• US Class Current: 425/170
• CPC Class Codes: B29C 2945/76006 Pressure
• CPC Class Codes: B29C 2945/7621 nozzle
• CPC Class Codes: B29C 2945/76214 drive means
• CPC Class Codes: B29C 2945/76254 Mould
• CPC Class Codes: B29C 2945/76381 Injection
• CPC Class Codes: B29C 2945/76558 termination
• CPC Class Codes: B29C 2945/76943 compare with thresholds
• CPC Class Codes: B29C 2945/76973 By counting
• CPC Class Codes: B29C 45/77 of velocity or pressure of moulding material
• CPC Class Codes: B29C 45/84 Safety devices B29C45/7626 takes precedence

Abstract

An injection molding system includes an injection molding machine and a data management device. The injection molding machine includes an abnormality detection unit that detects an abnormality of a pressure on a resin in an injection cylinder, and the data management device includes a data storage unit that stores abnormality detection data on the resin pressure, including a resin pressure value obtained when the abnormality of the resin pressure is detected by the abnormality detection unit and the time and date of detection of the abnormality. Further, the injection molding machine includes a data analysis unit that analyzes the abnormality detection data and a determination unit that determines whether or not to output an alarm, based on the result of analysis of the abnormality detection data.

Claims

1. An injection molding system comprising an injection molding machine and a data management device, which are connected by a transmission unit for data transfer therebetween,

the injection molding machine comprising:

a fixed platen which holds a fixed-side mold;

a movable platen which holds a movable-side mold and which is arranged facing the fixed platen and slidable by a mold clamping mechanism; and

a cylinder arranged facing a surface opposite the surface of the fixed platen on which the fixed-side mold is mounted,

wherein the cylinder is configured to melt a resin therein so that the resin is injected from a nozzle mounted on the distal end of the cylinder into a space between the fixed-side mold and the movable-side mold, and

the injection molding machine further comprises an abnormality detection unit configured to detect an abnormality of a pressure on the resin in the cylinder, and

the data management device comprising;

a data storage unit configured to store abnormality detection data on the resin pressure, including a resin pressure value obtained when the abnormality of the resin pressure is detected by the abnormality detection unit and the time and date of detection of the resin pressure abnormality by the abnormality detection unit;

a data analysis unit configured to analyze the abnormality detection data on the resin pressure; and

/or

a determination unit configured to determine whether or not to output an alarm, based on the result of analysis by the data analysis unit,

wherein the injection molding machine includes the data storage unit, the data analysis unit, and/or the determination unit which are not included in the data management device.

2. An injection molding system comprising an injection molding machine,

the injection molding machine comprising:

a fixed platen which holds a fixed-side mold;

a movable platen which holds a movable-side mold and which is arranged facing the fixed platen and slidable by a mold clamping mechanism; and

a cylinder arranged facing a surface opposite the surface of the fixed platen on which the fixed-side mold is mounted,

wherein the cylinder is configured to melt a resin therein so that the resin is injected from a nozzle mounted on the distal end of the cylinder into a space between the fixed-side mold and the movable-side mold, and

the injection molding system comprising;

an abnormality detection unit configured to detect an abnormality of a pressure on the resin in the cylinder;

a data storage unit configured to store abnormality detection data on the resin pressure, including a resin pressure value obtained when the abnormality of the resin pressure is detected by the abnormality detection unit and the time and date of detection of the resin pressure abnormality by the abnormality detection unit;

a data analysis unit configured to analyze the abnormality detection data on the resin pressure; and

a determination unit configured to determine whether or not to output an alarm, based on the result of analysis of the abnormality detection data by the data analysis unit.

3. The injection molding system according to claim 1, wherein the abnormality detection unit detects the pressure abnormality when a predetermined pressure value is reached by a detection value of the resin pressure or when an increase of the resin pressure exceeds a predetermined degree.

4. The injection molding system according to claim 1, wherein the determination unit obtains a life index related to the life of a component of an injection unit based on the abnormality detection data on the resin pressure from the data analysis unit and outputs the alarm when the obtained life index is deviated from at least one preset reference value.

5. The injection molding system according to claim 4, wherein the life index is the total number of detections of the abnormality of the resin pressure.

6. The injection molding system according to claim 4, wherein the life index is a time difference between the time and date of an Nth (N:

set integer of 2 or more) detection of the resin pressure abnormality and the time and date of an (N−

1)th detection of the resin pressure abnormality.

7. The injection molding system according to claim 4, wherein the life index is the sum total of resin pressure values obtained at the time of detection of the resin pressure abnormality.

8. The injection molding system according to claim 4, wherein the life index is the total number of days when the resin pressure abnormality is detected.

9. The injection molding system according to claim 4, wherein a plurality of reference values are used as the at least one reference value and different alarms are generated corresponding to different reference values, individually.

10. The injection molding system according to claim 4, wherein the alarm is generated when the number of detections of the resin pressure abnormality during a predetermined period exceeds a reference value or when the ratio of the number of detections of the resin pressure abnormality during the predetermined period to the total number of detections exceeds a predetermined reference value.

11. The injection molding system according to claim 1, wherein a password is added to the abnormality detection data or the abnormality detection data is stored in an encrypted form as the data storage unit stores the abnormality detection data.

12. The injection molding system according to claim 1, wherein the abnormality detection value of the resin pressure and the life index are individually set for each component.