AE sensor mounting structure

JP7872414B1Active Publication Date: 2026-06-09NISSEI PLASTIC IND CO LTD

Patent Information

Authority / Receiving Office: JP · JP
Patent Type: Patents
Current Assignee / Owner: NISSEI PLASTIC IND CO LTD
Filing Date: 2025-06-13
Publication Date: 2026-06-09

AI Technical Summary

Benefits of technology

【0015】 請求項1に係る発明では、加熱筒に設けられるシース熱電対を利用し、このシース熱電対にAEセンサを取付ける。樹脂材料が砕けるときなどに発生するAE波は加熱筒→シース熱電対→AEセンサの順で伝達される。従来は、導波棒を挿入するための穴を加熱筒に設けていたが、本発明はそのような穴を設けない。

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Abstract

This provides an alternative mounting structure for AE sensors to the embedded type. [Solution] As shown in Figure 7(a), the temperature of the heating cylinder 14 is detected by the sheath thermocouple 22, and temperature information is transmitted as indicated by arrow (1). As shown in Figure 7(b), vibration is transmitted to the sheath thermocouple 22 as indicated by arrow (2), and this vibration is detected by the AE sensor 32. Therefore, the sheath thermocouple 22 plays two roles: acquiring temperature information and acquiring AE waves. Conventionally, the heating cylinder 14 had a hole specifically for inserting a waveguide rod, but in the present invention, a hole specifically for inserting a waveguide rod is not necessary.

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Claims

1. A mounting structure for an AE sensor when measuring AE waves emitted by an injection device, The injection device comprises a heating cylinder containing a screw, a heater wrapped around the heating cylinder, and a sheathed thermocouple for detecting the temperature of the heating cylinder. When the sheathed thermocouple is divided into an insertion portion that is inserted into the heating cylinder and an exposed portion that is exposed from the heating cylinder, An AE sensor mounting structure characterized in that the AE sensor is attached to the exposed portion via an attachment.

2. The mounting structure for the AE sensor according to claim 1, The attachment comprises a first plate and a second plate that sandwich the sheathed thermocouple, a flanged cylindrical member having a flange portion that follows the second plate and a cylindrical portion that houses the AE sensor, and a bolt that fastens the three plates—the first plate, the second plate, and the flange portion—together. An AE sensor mounting structure characterized in that the AE sensor housed in the cylindrical portion is in contact with the second plate.

3. The mounting structure for the AE sensor according to claim 2, An AE sensor mounting structure characterized in that the cylindrical portion is provided with a biasing member that presses the AE sensor against the second plate.

4. The mounting structure for the AE sensor according to claim 3, The mounting structure for an AE sensor is characterized in that the biasing member is a compression spring housed in the cylindrical portion.