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Volume 14
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10.3390/machines14050565
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Article

Quantitative Investigation into Friction-Induced Vibration During Mold-Opening Transience in Ultra-High-Tonnage Two-Platen Injection Molding Machines with Massive Inertia and Constraint-Guided Sliding

by
Xiaozhou Chen
1,2,*,
Bin Han
1,
Wei Gu
1,
Meng Chen
2,
Chongyang Xie
1,
Lu Ren
3 and
Haibo Huang
1,2,*
1
School of Mechanical Engineering and Intelligent Manufacturing, Ningbo University, No. 818, Fenghua Road, Ningbo 315211, China
2
Fu Chun Shin (Ningbo) Machinery Manufacture Co., Ltd., No. 115, Haichuan Road, Ningbo 315211, China
3
Ningbo Institute of Dalian University of Technology, No. 26, Yucai Road, Ningbo 315016, China
*
Authors to whom correspondence should be addressed.
Machines 2026, 14(5), 565; https://doi.org/10.3390/machines14050565
Submission received: 22 April 2026 / Revised: 15 May 2026 / Accepted: 15 May 2026 / Published: 19 May 2026
(This article belongs to the Special Issue New Advances in Science of Mechanisms and Machines)
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Abstract

As extreme-scale manufacturing evolves, the dynamic response of heavy moving components under ultra-high loads becomes a critical design challenge. This study focuses on friction-induced vibration of a more than 30-ton movable mass during the mold-opening stage in a two-platen machine with a clamping force >17,000 kN. A mathematical model and a validated rigid/flexible multibody dynamics model with PID co-simulation were developed to analyze transient vibration using maximum acceleration amplitude and stability time as core metrics. The results show vibration stems from imbalance between anti-opening resistance and hydraulic driving force, amplified by vacuum collapse, static-to-dynamic friction transition at slide feet/rail interface and PID overshoot, featuring high amplitude density (>0.75 g), transience (<50 ms) and high impact (>60,000 N). The maximum vibration acceleration amplitude remains 79.22% even after there is no mold vacuum suction, indicating that a static friction force other than the vacuum suction is the dominant factor resulting in a severe friction-induced vibration. These mechanistic insights establish an applicable framework for the dynamic optimization of the heavy components in extreme-large-scale manufacturing equipment.
Keywords: movable platen; friction-induced vibration; multibody dynamics; force imbalance; vacuum suction movable platen; friction-induced vibration; multibody dynamics; force imbalance; vacuum suction

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MDPI and ACS Style

Chen, X.; Han, B.; Gu, W.; Chen, M.; Xie, C.; Ren, L.; Huang, H. Quantitative Investigation into Friction-Induced Vibration During Mold-Opening Transience in Ultra-High-Tonnage Two-Platen Injection Molding Machines with Massive Inertia and Constraint-Guided Sliding. Machines 2026, 14, 565. https://doi.org/10.3390/machines14050565

AMA Style

Chen X, Han B, Gu W, Chen M, Xie C, Ren L, Huang H. Quantitative Investigation into Friction-Induced Vibration During Mold-Opening Transience in Ultra-High-Tonnage Two-Platen Injection Molding Machines with Massive Inertia and Constraint-Guided Sliding. Machines. 2026; 14(5):565. https://doi.org/10.3390/machines14050565

Chicago/Turabian Style

Chen, Xiaozhou, Bin Han, Wei Gu, Meng Chen, Chongyang Xie, Lu Ren, and Haibo Huang. 2026. "Quantitative Investigation into Friction-Induced Vibration During Mold-Opening Transience in Ultra-High-Tonnage Two-Platen Injection Molding Machines with Massive Inertia and Constraint-Guided Sliding" Machines 14, no. 5: 565. https://doi.org/10.3390/machines14050565

APA Style

Chen, X., Han, B., Gu, W., Chen, M., Xie, C., Ren, L., & Huang, H. (2026). Quantitative Investigation into Friction-Induced Vibration During Mold-Opening Transience in Ultra-High-Tonnage Two-Platen Injection Molding Machines with Massive Inertia and Constraint-Guided Sliding. Machines, 14(5), 565. https://doi.org/10.3390/machines14050565

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