Page 86 - 《橡塑技术与装备》英文版2026年2期

HINA R&P TECHNOLOGY AND EQUIPMENT

Table 1 Research plan table
Serial number Process Parameter Protocol Result Analysis Expected goal
A two-factor level experiment
was conducted with 3 types of Optimal parameter
1 Number of softening times frequencies and 3 types of roller analysis is conducted Determine the optimal
Blank softening distances, involving a total of 9 sets through the correlation combination of softening
trend chart of hardness
of parameters and 45 test pieces, with frequency and roller roller spacing and
frequency
2 Softening roller distance which were individually subjected to spacing
data detection and analysis
Evaluate the validity
of parameters based
Conduct single-factor variation on appearance quality,
tests with 3 different thin-pass Determine the optimal
3 Blank is thin and smooth Number of thin-pass times times, using 5 test pieces for and analyze the optimal thin-pass frequency
each parameter, and perform data parameters through trend parameter
charts of the number of
inspection and analysis
thin-passs and changes in
hardness
A two-factor level experiment
was conducted with four types of The minimum lap length
is determined by the
molding ring inner diameters and qualified rate of effective
three types of overlap lengths, Determine the optimal lap
4 Blank ring forming Lapping length bonding within the group,
resulting in 12 combinations of length
parameters. Each combination and the optimal lap length
is determined by the trend
involved 10 test pieces for data of tensile force change
collection and analysis
2 Results and analysis to pass through several times, and wait until it becomes soft."
2.1 Blank softening To analyze the influence of roller spacing and passing times on
Blank softening is a preparatory process for the re- the softening degree of the rubber compound, a combination
refining process, aiming to reduce the hardness of the verification test was conducted on roller spacing and passing
rubber compound and increase its overall temperature, times, using Shore A hardness to evaluate the softening degree
thereby enhancing the re-refining effect. In previous process of the rubber compound (lower Shore A hardness indicates
documents, the requirements for the softening process were better softening). Each combination was tested three times, and
simply "increase the roller spacing, allow the rubber compound the results are shown in table 2.

Table 2 Softening degree test
Rubber compound Rubber compound
Test Number Roll spacing/mm Number of passes/time Test Number Roll spacing/mm Number of passes/time
Shore hardness Shore hardness
1 1.7 3 48 24 2.85 5 38
2 1.7 3 46 25 2.85 5 37
3 1.7 3 50 26 2.85 7 49
4 1.7 3 47 27 2.85 7 48
5 1.7 3 44 28 2.85 7 50
6 1.7 5 43 29 2.85 7 47
7 1.7 5 47 30 2.85 7 49
8 1.7 5 39 31 4 3 58
9 1.7 5 50 32 4 3 59
10 1.7 5 39 33 4 3 61
11 1.7 7 48 34 4 3 60
12 1.7 7 40 35 4 3 58
13 1.7 7 50 36 4 5 58
14 1.7 7 47 37 4 5 57
15 1.7 7 31 38 4 5 60
16 2.85 3 51 39 4 5 53
17 2.85 3 50 40 4 5 54
18 2.85 3 55 41 4 7 58
19 2.85 3 51 42 4 7 57
20 2.85 3 50 43 4 7 60
21 2.85 5 42 44 4 7 53
22 2.85 5 39 45 4 7 56
23 2.85 5 43

·42· Vol.52，No.2