Determination of Physical Properties of Rubber Seed

ZHANG Qi-qi;WANG Tao;SUN Li-ying;College of Mechanical and Electrical Engineering,Hainan University;

rubber [Hevea brasiliensis(Willd.ex A.Juss.)Muell.Arg.];;seeds;;physical properties;;determination

To improve the comprehensive utilization of rubber seed and manufacture high effective hull devices, several physical properties of rubber [Hevea brasiliensis(Willd. ex A. Juss.)Muell. Arg.] seed including, geometrical size, different diameter, density, hull thickness, ruptures force, static coefficients of friction and etc. were evaluated. The results showed that the arithmetic and geometric diameter decreased with the increase of moisture content and was the minimum(20.883,20.633 mm, respectively) when moisture content was 35.4%. The sphericity increased from 0.850 to 0.868 with the increase of moisture content, showing a obvious linear relationship. The surface area decreased to the minimum at the moisture content35.4%, then increased with the moisture content increasing. Mass, volume and density all show obvious positive linear relationship with moisture content. The static coefficients of friction on steel plate and wood plate surface all increased linearly with the increase of moisture content, ranging from 0.254 to 0.331 and 0.222 to 0.417, respectively. Referring to rupture force, it decreased linearly in length and thickness; but the width decreased first then nonlinearly increased. The results could provide reasonable and reliable data support for the design and production of rubber-seed-relative machines such as huller, oil press and sorting machine, and offer original data reference for relative studies.