Inspection method for injection molding device, test mold, and inspection system

Patent metadata

Field	Value
Publication number	US-2021221041-A1
Application number	US-202117248294-A
Country	US
Kind code	A1
Filing date	Jan 19, 2021
Priority date	Jan 22, 2020
Publication date	Jul 22, 2021
Grant date	—

Abstract

An inspection method for an injection molding device includes: a first step of acquiring a first detection value from a sensor using a test mold having the sensor, the sensor measuring a temperature or pressure of a molten material injected from a first injection molding device into a cavity section demarcated by a fixed mold and a moving mold; a second step of injecting a molten material from a second injection molding device into the cavity section and acquiring a second detection value from the sensor; and a third step of performing an inspection using the first detection value and the second detection value.

First claim

What is claimed is:

1 . An inspection method for an injection molding device, the inspection method comprising:
a first step of acquiring a first detection value from a sensor using a test mold having the sensor, the sensor measuring a temperature or pressure of a molten material injected from a first injection molding device into a cavity section demarcated by a fixed mold and a moving mold; a second step of injecting a molten material from a second injection molding device into the cavity section and acquiring a second detection value from the sensor; and a third step of performing an inspection using the first detection value and the second detection value.

2 . The inspection method according to claim 1 , wherein
the second injection molding device is a device that is the first injection molding device used over years, and in the third step, change in state with time of the first injection molding device is inspected.

3 . The inspection method according to claim 1 , wherein
the first injection molding device and the second injection molding device are different devices, and in the third step, a variation in state of the first injection molding device and the second injection molding device is inspected.

4 . The inspection method according to claim 1 , wherein
in the third step, an abnormality in the second injection molding device is inspected.

5 . The inspection method according to claim 4 , wherein
in the third step, the inspection is performed using a machine learning model in which a correlation between the first detection value and the second detection value, and the abnormality, is learned.

6 . The inspection method according to claim 1 , wherein
the first detection value and the second detection value are time-series data resulting from acquiring an output from the sensor for a predetermined period.

7 . The inspection method according to claim 1 , wherein
the test mold has a sensor measuring a position of the moving mold.

8 . The inspection method according to claim 1 , wherein
the first injection molding device and the second injection molding device have a plasticizing unit having:
a rotor having a groove formed on an end surface;
a barrel arranged facing the end surface and having a communication hole formed therein; and
a heating unit.

9 . A test mold installed in an injection molding device, the test mold comprising:
a fixed mold; a moving mold; a cavity section demarcated by the fixed mold and the moving mold; and a sensor measuring a temperature or pressure of a molten material injected from the injection molding device into the cavity section.

10 . An inspection system for an injection molding device, the inspection system comprising:
a test mold having a fixed mold, a moving mold, a cavity section demarcated by the fixed mold and the moving mold, and a sensor measuring a temperature or pressure of a molten material injected from the injection molding device into the cavity section, the test mold being installed in the injection molding device; a terminal device having an acquisition unit that acquires a detection value from the sensor and a transmission unit that transmits the detection value; and a server having a receiving unit that receives the detection value transmitted from the transmission unit, an inspection unit that performs an inspection of the injection molding device using the detection value, and an output unit that outputs a result of the inspection.

Assignees

• Seiko Epson Corp

Inventors

• Sasagawa Kakeru

Classifications

• B29C45/77 Primary

  of velocity or pressure of moulding material · CPC title

• B29C45/78

  of temperature · CPC title

• B29C2945/7604

  Temperature · CPC title

• B29C2945/76257

  cavity · CPC title

• B29C2945/76949

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