Affiliation:
1. The State Key Laboratory of Fluid Power and Mechatronic Systems , College of Mechanical Engineering, Zhejiang University , Hangzhou 310027 , China
2. The Key Laboratory of 3D Printing Process and Equipment of Zhejiang Province , College of Mechanical Engineering, Zhejiang University , Hangzhou 310027 , China
Abstract
Abstract
An online and feasible clamping force measurement method is important in the injection molding process and equipment. Based on the sono-elasticity theory, an in situ clamping force measurement method using ultrasonic technology is proposed in this paper. A mathematical model is established to describe the relationship between the ultrasonic propagation time, mold thickness, and clamping force. A series of experiments are performed to verify the proposed method. Experimental findings show that the measurement results of the proposed method agree well with those of the magnetic enclosed-type clamping force tester method, with difference squares less than 2 (MPa)2 and errors bars less than 0.7 MPa. The ultrasonic method can be applied in molds of different thickness, injection molding machines of different clamping scales, and large-scale injection cycles. The proposed method offers advantages of being highly accurate, highly stable, simple, feasible, non-destructive, and low-cost, providing significant application prospects in the injection molding industry.
Subject
Materials Chemistry,Polymers and Plastics,General Chemical Engineering
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