Manufacturing of High-Load Engine Mounts From Rubber Composites (Natural Rubber and Carbon Black) with Novel Properties

Abstract

This paper explains the successful and simple process of generating a rubber mount with novel properties by incorporating carbon black particles type ISAF 220 at different ratios ([46, 56, 66, 76, 86] [pphr]). Rubber mounting was made using 100 % natural rubber and carbon powder that was applied to the master batch ratio (60 g). To achieve greater homogeneity, rubber and carbon were combined for several minutes. The rubber mount has been subjected to several tests at Babylon tires factory and Babylon University (tensile, elongation, modulus, compression, hardness, rebound resilience, specific gravity and fatigue tests). The best results were obtained from the rubber mount, as it had the ability to resist fatigue and could be used for a long period of time. It could also increase the number of cycles to 900 rpm. The rubber mount that was reinforced with carbon had a better resistance to the mechanical properties (tensile, hardness, fatigue and resilience). The results of the tensile strength, hardness, fatigue and resilience tests showed that additional quantities of carbon at 66 pphr increased the values by up to 18.95 Mpa, 64 Mpa, 600 Mpa and 55.5 Mpa, respectively.

Rice husk silica blended fillers for engine mount application

“…For the Shore A hardness, the measured values for all composites were within the ranges published by many studies 41 , 46 , 47 . A shore A hardness value between 45 to 70 has been reported to be the ideal hardness range for rubber engine mounts corresponding to an ideal filler loading range from 46 to 96 phr for high-load automotive rubber engine mounts 41 , 46 , 47 . Figure 4 c shows the Shore A hardness of the RHS/N772 natural rubber composites.…”

“…Transmissibility curves with rounded or flattened peaks are typically connected to vibration isolators that have high damping ratios. The research results of several studies 37 , 46 , 63 that low amplitude and high frequency require low damping and stiffness values while at low frequencies, typically less than 30 Hz, the rubber mount is expected to possess high stiffness and damping, are supported by the results of transmissibility curves obtained in this study. From the REMs’ vibration isolation efficiency curves shown in Fig.…”

“…Figure 6 shows the results for the tensile strength, tensile modulus, and tear strength of the RHS/N772 blended composites. Studies 44 , 46 , 48 , have shown that the increased modulus with increasing filler loading observed in the results was in part attributable to the effect of the rice husk silica particles in the composites. The excellent tensile strength and modulus of the composites can be attributed to the large specific surface area of the silica particles 48 .…”

“…Many studies 46 , 50 – 52 have also reported outstanding mechanical characteristics for rubber composites with filler loading levels between 50 and 70. A study 52 combined RHS with commercial silica to achieve optimal mechanical properties, adopting a filler blend ratio of 20/30 phr for RHS and commercial silica, respectively.…”