New and improved railroad tie and method for making same

将热塑性聚合物、橡胶状聚合组分和增强填料混合，加热至380°F-440°F。然后将得到的混合物加入班伯里(Banbury)混合机(s10)，得到的混合物加入供应两个模具(s17)的转向器(s16)。控制正在填充的每一个模具的活塞速度，从而控制铸模产品沿其长度的密度。当每一个模具被充满时，将其沉入冷却水浴(50°F-60°F)(s20)，同时填充下一个模具。将这些模具依次转移到气冷轨道，从而完成该工艺。一般包括垂直于铸模产品纵轴的缺口的图案在铁道枕木和枕木下面的碎石之间提供摩擦表面。 Thermoplastic polymers, rubbery polymeric components and reinforcing fillers are mixed and heated to a range of 380° F. to 440° F. The resulting mixture is then fed into a Banbury mixer, with the resulting mixture fed into a diverter feeding two molds. The velocity of the piston of each mold being filled is controlled to thereby control the density of the molded product along its length. As each mold is filled, it is deposited in a cool water bath (50° F.-60° F.) while the next mold is being filled. The molds are sequentially transferred to an air cooling rack to complete the process. A texture, generally comprising indentations perpendicular to the longitudinal axis on the molded object, provides a frictional surface between the railway crosstie and the ballast beneath the crosstie.