Page 89 - 《橡塑技术与装备》英文版2026年1月

EQUIPMENT MANAGEMENT AND MAINTENANCE

Exploration of the lubrication system of the internal mixer

Qin Enchen, Wu Jianming, Cai Chao
(Sinochem (Fujian) Rubber & Plastics Machinery Co. LTD., Yiyang 413000, Hunan, China)
Abstract: This article conducts research and analysis on the design, working principle, and application
of the mixer lubrication system in the rubber industry. It explores the classification of lipid-based lubrication
and thin oil lubrication, and evaluates the impact of the lubrication system on equipment performance
and the precision of rubber compound formulations. At the same time, based on actual needs and existing
technologies, it points out the direction for reducing production costs and increasing product profits.
Key words: internal mixer; lubrication system; performance optimization; environmental protection;
intelligence
Classification number: TQ32 Article number: 1009-797X(2026)01-0043-06
Document code: B DOI:10.13520/j.cnki.rpte.2026.01.013

According to market research reports, the market size of The lubrication system of the internal mixer is mainly
China's rubber products industry in 2023 was approximately divided into two categories: grease lubrication and thin oil
828 billion yuan, and it is estimated that the global market size lubrication.
of rubber products will reach 150 billion US dollars by 2025. Lipid lubrication is suitable for applications such as
With the rapid development of the rubber industry, the rotor bearings, discharge door shaft bearings, feed door shaft
requirements for the performance of internal mixer have been bearings, sealing copper strips, ram piston rod bearings, and
continuously improved. Good lubrication can play a role in locking device support bearings. Usually, one or more electric
cooling, heat dissipation, and sealing of key components, and grease pumps are equipped, and the grease pump is typically
it is also the guarantee for the long-term stable operation of the equipped with a 0.25 kW motor with a rotational speed of 710
internal mixer. The absence of a lubrication system can lead to r/min. A single grease pump usually comes with a level switch
an increased failure rate of the internal mixer, or even prevent for low oil level alarm, facilitating timely oiling and avoiding
it from working properly. At the same time, the quality of the equipment damage due to oil shortage. Some grease pumps
lubrication and sealing performance of the rotor end face of are also equipped with automatic greasing systems to enhance
the internal mixer directly affects the accuracy of the rubber automation levels, but they require a higher level of on-site
compound formula and the stability of the rubber compound environmental conditions.
quality. It can be said that the small lubrication system plays a The other type is thin oil lubrication, which is mainly
crucial role in the normal operation of the internal mixer. This applied to the surfaces of the stationary and rotating rings, as
article will analyze and discuss the working principle, design, well as the lubrication between the rotor end face and the wear
and future development of the internal mixer lubrication plate. Except for small-sized internal mixers, most internal
system.

Biography: Qin Enchen (1993-), male, holds a Bachelor's degree in
1 Classification and configuration of Engineering and is an engineer, serving as a senior technical manager
lubrication system (mechanical), primarily engaged in the design of internal mixer and other
related work.

Vol.52，2026 ·43·