The present invention relates to a railroad sleeper (1) for fixation of at least a pair of rails (2,2′) of a railroad network, comprising a contact surface (3), wherein each rail of the pair of rails (2,2′) is fixed spaced apart from each other, the railroad sleeper (1) being configured by comprising a hollow sector (4) delimited by association of the contact surface (3) with the anchorage walls (5,5′), thus establishing a free portion (17) adjacent to the anchorage walls (5,5′) and opposite the contact surface (3). The present invention further discloses an embodiment in which the hollow sector (4) of the railroad sleeper is delimited by a support surface and the process of manufacturing a railroad sleeper.

The invention relates to a sleeper for the track superstructure, which is manufactured in one piece from a plastic material, with the sleeper having an elongated base shape with two end sections, which are connected by a middle section of the sleeper and held at a distance and on their upper side in each case one contact surface is provided for in each case one rail to be supported on the respective end section with a reinforcement extending in the longitudinal direction of the sleeper being embedded into the middle section. In order to design such a plastic sleeper such that it has optimised strength and can be reliably manufactured even using cost-effective plastic/sand mixtures having a high proportion of sand, the invention proposes that the reinforcement extends over the length of the middle section, that the reinforcement is in each case anchored in the respective end section an edge region of the end sections assigned to the middle section and in that the reinforcement is wholly or partially arranged in the upper quarter of the height of the sleeper.

The invention relates to a sleeper for the track superstructure, which is manufactured in one piece from a plastic material, with the sleeper having an elongated base shape with two end sections, which are connected by a middle section of the sleeper and held at a distance and on their upper side in each case one contact surface is provided for in each case one rail to be supported on the respective end section with a reinforcement extending in the longitudinal direction of the sleeper being embedded into the middle section. In order to design such a plastic sleeper such that it has optimised strength and can be reliably manufactured even using cost-effective plastic/sand mixtures having a high proportion of sand, the invention proposes that the reinforcement extends over the length of the middle section, that the reinforcement is in each case anchored in the respective end section an edge region of the end sections assigned to the middle section and in that the reinforcement is wholly or partially arranged in the upper quarter of the height of the sleeper.

A molded composite cross tie and two molded, non-metallic composite tie plates are molded into a single molded railroad composite cross tie unit. The molded railroad composite cross tie unit is fully assembled and ready for laying a ballast and accepting railroad track. The molded, non-metallic composite tie plates are molded with a cant onto which railroad track may be laid. The railroad track is secured by either traditional spikes or screws. When secured by screws, holes are molded with thread that is compatible with the screws used to hold the railroad track in place. One molded, non-metallic composite tie plate is molded into each end of the molded composite cross tie. The separation between the two molded, non-metallic composite tie plates is determined by the gauge of the railroad track.

A molded composite cross tie and two molded, non-metallic composite tie plates are molded into a single molded railroad composite cross tie unit. The molded railroad composite cross tie unit is fully assembled and ready for laying a ballast and accepting railroad track. The molded, non-metallic composite tie plates are molded with a cant onto which railroad track may be laid. The railroad track is secured by either traditional spikes or screws. When secured by screws, holes are molded with thread that is compatible with the screws used to hold the railroad track in place. One molded, non-metallic composite tie plate is molded into each end of the molded composite cross tie. The separation between the two molded, non-metallic composite tie plates is determined by the gauge of the railroad track.

A railroad sleeper for fixation of at least one pair of rails of a railroad network, the railroad sleeper may include a contact surface, wherein each rail of the pair of rails is fixed thereto spaced apart from each other; anchorage walls extending downward from the contact surface, and having a support point at a bottom surface thereof, the anchorage walls having at least one aperture formed therein; and a void delimited by the contact surface and anchorage walls.

A railroad sleeper for fixation of at least one pair of rails of a railroad network, the railroad sleeper may include a contact surface, wherein each rail of the pair of rails is fixed thereto spaced apart from each other; anchorage walls extending downward from the contact surface, and having a support point at a bottom surface thereof, the anchorage walls having at least one aperture formed therein; and a void delimited by the contact surface and anchorage walls.

A plastic article is recited having a plastic shell including walls defining a cavity. Within the cavity is an in-situ foam core including expanded polymer beads. A layer of the expanded polymer beads includes a layer of distorted beads adjacent to the walls. The in-situ foam core has a thermal bond to the walls.

A plastic article is recited having a plastic shell including walls defining a cavity. Within the cavity is an in-situ foam core including expanded polymer beads. A layer of the expanded polymer beads includes a layer of distorted beads adjacent to the walls. The in-situ foam core has a thermal bond to the walls.

Embodiments of the present technology are directed to a grooved composite industrial block product. The industrial block products described herein may be manufactured from plastic materials. Methods for manufacturing such grooved composite block products are additionally described herein, and comprise filling a grooved block mold with a polymeric mixture comprising plastic materials. The grooved composite block products described herein may be utilized in various industrial applications, including as railroad ties and industrial matting.