US 12,269,199 B2
Inspection method for injection molding device, test mold, and inspection system
Kakeru Sasagawa, Matsumoto (JP)
Assigned to SEIKO EPSON CORPORATION, Tokyo (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Jan. 19, 2021, as Appl. No. 17/248,294.
Claims priority of application No. 2020-008302 (JP), filed on Jan. 22, 2020.
Prior Publication US 2021/0221041 A1, Jul. 22, 2021
Int. Cl. B29C 45/80 (2006.01); B29C 45/77 (2006.01); B29C 45/78 (2006.01)
CPC B29C 45/80 (2013.01) [B29C 45/77 (2013.01); B29C 45/78 (2013.01); B29C 2945/76006 (2013.01); B29C 2945/7604 (2013.01); B29C 2945/76083 (2013.01); B29C 2945/7618 (2013.01); B29C 2945/76257 (2013.01); B29C 2945/76381 (2013.01); B29C 2945/76498 (2013.01); B29C 2945/76568 (2013.01); B29C 2945/76949 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An inspection method, comprising:
acquiring a first detection value from a sensor installed in a test mold, the sensor measuring a temperature or pressure of a first molten material injected from a first injection molding device into a cavity section of the test mold, wherein
the cavity section is demarcated by a fixed mold and a moving mold of the test mold,
the first detection value indicates first time-series data that results from acquiring an output from the sensor for a first predetermined period, and
the test mold is removably installed in the first injection molding device at a first time for the acquisition of the first detection value;
controlling a second injection molding device to perform an injection molding process to inject a second molten material from the second injection molding device into the cavity section of the test mold;
acquiring a second detection value from the sensor during the injection molding process, wherein
the test mold is removably installed in the second injection molding device at a second time for the acquisition of the second detection value, and
the second detection value indicates second time-series data that results from acquiring the output from the sensor for a second predetermined period;
determining whether a difference between a first value of the first time-series data and a second value of the second time-series data exceeds a threshold, wherein
the first value includes one of a peak value, an average value, or a median of the first time-series data, and
the second value includes one of a peak value, an average value, or a median of the second time-series data;
detecting an abnormality in the second injection molding device based on the determination that the difference exceeds the threshold, in a case where the second injection molding device corresponds to a device used over time; and
detecting, based on a comparison between the first detection value of the first molding device and the second detection value of the second injection molding device, a variation in a state of the first injection molding device and the second injection molding device, in a case where the second injection molding device is a different device from the first injection molding device and a configuration of the second injection molding device is same as a configuration of the first injection molding device.