Page 85 - 《橡塑技术与装备》英文版2026年2期

TEST AND ANALYSIS

Study on the influence of raw material preparation on the performance
of FX-4 rubber sealing rings

Wang Bingxue, Xu Qianqian, Zhang Xiaofeng*
(Chengdu Hangli Group, Chengdu 611930, Sichuan, China)

Abstract: This article focuses on the three processes that significantly affect the performance of the
FX-4 rubber sealing ring during its preparation. Combination verification tests with different parameters and
levels are conducted, and corresponding testing items are performed to determine the optimal parameter
combination.
Key words: billet preparation; FX-4; rubber sealing ring; performance
Classification number: TQ32 Article number: 1009-797X(2026)02-0041-05
Document code: B DOI:10.13520/j.cnki.rpte.2026.02.011

FX-4 rubber has excellent high temperature resistance, rubber mixing machine. The roller gap is set to 1.7/2.85/4 mm,
vacuum resistance, and also strong acid resistance, resistance and the rubber compound is softened through 3/5/7 passes; the
to various oils, and ozone aging resistance. Its comprehensive roller gap is locked for thin passing, which is performed 10 to
performance is very excellent, making it a widely used rubber 15 times; ethyl acetate is used to overlap and bond the ends of
in the field of aero-engines. the rubber strip into a circle.
The preparation process of FX-4 rubber seal ring blanks The rubber compound undergoes two-stage curing.
involves three procedures: blank softening, blank thinning, The first stage is carried out using a curing press under the
and blank ring forming. This article focuses on these three conditions of 175 ℃ for 15 minutes at 13 MPa. The second
procedures, conducting combination verification tests with stage is conducted in an oven under the conditions of 250 ℃
different parameters and levels, performing corresponding for 8 hours.
testing items, and determining the optimal parameter Combination verification tests with different parameters
combination. This research is of great significance for and levels are conducted for blank preparation (blank softening,
ensuring the precision of our company's FX-4 rubber seal ring thinning, and blank ring forming), and corresponding testing
production process and the stability of product manufacturing items are carried out. The detailed scheme is shown in table 1.
quality.
1.3 Test method
1 Experiment GB/T 528-2009 "Rubber, Vulcanized or Thermoplastic-
1.1 Main equipment Determination of Tensile Stress-Strain Properties";
Rubber mixing machine, XK-250; curing press, HPC- GB/T 3452.1-2008 "O-Rings for Hydraulic and
100D, 100 t; microcomputer-controlled electronic universal Pneumatic Applications - Part 1: Dimensions and Tolerances";
testing machine, CMT4303, 1 t; oven, WG3006, maximum GB/T 531.1-2008 "Rubber, Vulcanized or Thermoplastic
operating temperature 300 ℃; flash tester, VX3200D, -Determination of Indentation Hardness-Part 1: Shore
resolution: 0.1 μm. Durometer Method (Shore Hardness)".
1.2 Sample preparation Biography: Wang Bingxue (1992-), male, engineer, mainly engaged in
The rubber compound is mixed and re-refined using a research in material engineering.

Vol.52，2026 ·41·