Servo-driven type mold clamping unit mold protection method
US6641757B2 · kind B2 · utility
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8References
6Claims
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Key dates
| Filing date | Feb 22, 2002 |
| Grant date | Nov 4, 2003 |
| Priority date | — |
| Expiry date | Feb 22, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2045/1792
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for protecting a mold of a servo-driven type mold clamping unit comprises the steps of (a) changing the torque output of the power source generated by a servo-motor subject to the position of a movable die of the mold, and (b) comparing the values set in an encoder of the servo-motor with signal received by the encoder when the movable die is in displacement so as to detect the presence of any foreign objects in the mold for determination of normal/abnormal handling control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.